Stormbloc User Manual
Contents
1. If the system is installed within the groundwater table it is advisable that encapsulation of the system is carried out to ensure the system is 100 watertight Failure to do so could reduce the available storage capacity of the Stormbloc system 4 Designing the Stormbloc Tank The Stormbloc system comprises of 6 different components 4 1 Stormbloc Modules 4 2 Connection Pieces 4 3 End Plates Pipe Adapters 4 4 Stormbloc Inspect Modules Access Chambers and Upstream Catchpits 4 5 Inlet and Outlets 4 6 Geotextiles and Geomembranes 4 1 Stormbloc Modules The main infiltration or storage tank is comprised Example of Stormbloc modules in a configuration to suit the If 60 m is required then the number of modules to be used location A single 0 8 m x 0 8 m x 0 66 m module can be calculated as follows holds 0 401 m of stormwater and so the design should 60 0 401 149 63 incorporate a sufficient number of modules to provide 150 No Stormbloc modules should be used the required volume These could be arranged in the configuration 12mx4 mx 1 32 m The base layer should be laid directly onto the 7 i y 15 modules long x 5 modules wide x 2 modules deep geotextile or membrane The blocks should be laid such that the tunnels are in line creating access through the system d d O Ty ad Bd The two available module sizes offer a high level of Si Pele Pele Ter flexibility in the desig2. ly International stormwater VS NN MN INI ab ed d utu za ad Se e d we Es m arati VR LANI UA data Stormbloc User Manual al wah aa mam X uw x EL NNN AY M M i turning water around Stormbloc Storage amp Infiltration System Regulatory and guidance documents such as PPS 25 and Building Regulations are putting increasing demands on developers and engineers to consider sustainable drainage systems SUDS wherever possible and to incorporate source control approaches into surface water drainage systems sustainable drainage systems SUDS are increasingly being used to mitigate the flows and pollution from runoff The philosophy of SUDS is to replicate as closely as possible the natural drainage from a site before development and to treat runoff to remove pollutants so reducing the impact on receiving watercourses This requires a reduction in the rate and volume of runoff from developments combined with treatment to remove pollutants as close to the source as possible 1 CIRIA C609 2004 Sustainable Drainage Systems Hydraulic structural and water quality advice Integrated Stormwater Systems As with all Hydro s Stormwater Systems Stormbloc and Stormbloc Inspect can be integrated with or used in place of what are becoming increasingly known as soft SUDS solutions such as swales ponds lagoons etc Hydro International i
3. Our History Our Advantage Hydro International was formed in 1980 to promote the Hydro International is committed to a policy of continuous hydrodynamic separator and vortex flow control technology Product development Our understanding of integrated around the world water management ensures that sustainable site specific solutions set the standards We have also been promoting source control and what are now commonly known as Sustainable Drainage Systems To ensure that research outputs are of the highest SUDS for well over a decade quality Hydro International utilises state of the art testing technology and analytical techniques both in house and through independent centres of excellence Contact us Today If you require assistance with design or would like further information on any of our other stormwater products call us at 01275 337977 or visit us on line at www hydro international biz We look forward to working with you Hydro International stormwater United Kingdom Hydro International Water amp Wastewater Prickwillow Road Ely Cambridgeshire CB7 4TX Tel 44 0 1353 645700 Fax 44 0 1353 645702 mm mmm vm mm e bei Pa oa www hydro international biz d S a 3 F 17 Hydro International otormwater Shearwater House Clevedon Hall Estate Victoria Road e Clevedon BS21 7RD Tel 01275 878371 Fax 01275 874979 United States Hydro International Stormwater amp Wet Wea
4. pipe adapter end plate can be supplied to be requested at time of order The pipe adapter end plate should then be located over the tunnel and screwed into the vertical columns to either side of the tunnel using the screws provided the use of an electric screwdriver is recommended Aflexible pipe coupling by others to suit the outer diameter of the pipe and the outer diameter of the spigot 250 mm should be used to form a positive connection between the pipe and the spigot on the pipe adapter if required Larger diameter pipe connections up to 500 mm ID can be made using a Stormbloc Inspect Chamber Where pipe connections are to be made a cross should be cut in the geotextile or membrane and the triangular flaps created by the cut should be sealed around the pipe Stormbloc modules 800 x 800 x 660 mm Snap loc End Plate on All Unused Tunnels SES by Hydro Flexible Adapter coupling to suit OD of diameter 225 mm pipe and OD of adapter end plate spigot diameter 259 mm By others 225 mm diameter pipe by others Step 6 Attach end plates Typical Installation Method 9 Geotextile Membrane Installation The sides and top of the Stormbloc modules should be completely covered by the geotextile and or membrane as appropriate The geotextile membrane should have sufficient overlap at the joints such that no backfill material or fines can enter the modules The geotextile membrane
5. should be cut to allow the pipes to enter the system Note Care should be taken to ensure that the geotextile membrane is not torn or punctured during installation 10 Impermeable Membrane Sealing Cover the Stormbloc tank with the impermeable membrane to create a watertight seal in accordance with the membrane manufacturer s recommendations The membrane should be cut and sealed appropriately where pipe connections are to be made Step 7 Finish geotextile and attach pipes and access shafts 11 Lateral Backfilling The connection pieces between the modules will generally prevent any lateral slipping when backfilling With smaller installations it is recommended that the modules are restrained whilst backfilling It is recommended that the lateral backfilling is comprised of suitable non angular granular material eg Type 1 or Type 2 granular sub base or Class 6P selected granular material as defined in the Department for Transport Specification for Highway Works SHW This material is compacted in 150 mm Step 8 Lateral backfilling layers by means of a vibrating plate compactor and installed in accordance with Tables 6 1 or 8 1 of the SHW It is to be ensured that the geotextile membrane overlaps are not pulled apart torn or punctured Typical Installation Method 12 Cover Backfill Above the System Installation under Landscaped Non trafficked Areas Stormbloc should be installed
6. time Reduces capital costs on overall project Dimension 1 Layer 2 Layers 3 Layers BELL i MAMA 1 Optional Inlet 360 rotation Ventilation Ke Mi ee wx Upper Inlet Boone has dh ht jhe e LEES T4 Ww gt DN x DM dr ANIL 4 A B d E CT Al 0 DC dh pc AES pii D A LE S i ut F E 5 Av E d kN BL a e 1 F vr Ki Lower Inlet Inspection PIE K Ze 5 d Vs 5 d TEB Pipe Invert Access W i 15 d d d 81 lm Level 45 mm gt D xc NOME ETWT See Above Base Z i of Unit Sto rm 0 OC Applications Due to its modular nature Stormbloc can be arranged in any number of configurations for both infiltration and storage Typical examples include A large shallow infiltration or storage blanket typically 1 block deep with a minimum depth of 350 mm An infiltration trench typically quite narrow and long depth length combinations are infinitely variable A large infiltration or storage structure typically rectangular or square in plan with depth to suit An individual soakaway typically relatively small serving single or small numbers of dwellings Design Hydro International offers a free outline design service ensuring the most efficient and cost effective solution for infiltration soakaway and storage structures A further more detailed Hydrological Analysis service is also ava
7. E MT ELE RAE PA FR ELA 515 90 006 Stormbloc Module half block Mass 12 kg TEET d E Le TUTTI k dul 519 90 001 Single Layer Connector Mass 0 02 kg Half Block Connector Mass 0 01 kg 519 90 014 Parts List Product Code Description 519 90 004 Multi layer Connector Mass 0 04 kg 519 90 200 Snap loc End Plate no hole Mass 1 35 kg 519 90 215 150 mm dia hole 519 90 220 200 mm dia hole 519 61 150 150 mm dia Adapter Socket Mass 0 45 kg 519 61 200 200 mm dia Adapter Socket Mass 0 745 kg 510 90 000 225 Adapter End Plate Mass 1 30 kg 250 mm dia 5 mm mm mm mm pm mm mm mm 8 Order Parts List Product Code 515 01 000 1 layer 0 66 m deep 515 02 000 2 layers 1 32 m deep 515 03 000 3 layers 1 98 m deep 515 50 551 1 m long 515 50 552 2 m long 515 50 553 3 m long 515 50 521 1 m long 515 50 522 2 m long 515 50 523 3 m long Description Stormbloc Inspect Mass 24 kg per layer Extension Shaft Without Inlet Connection Mass 17 5 kg m Extension Shaft With Inlet Connection Mass 17 5 kg m CUu Tuum rs H pann For more than 25 years Hydro International s commitment to product research and development has set industry standards With a proven track record Stormbloc is the storage system N technology driving design
8. Loadings The maximum depth to the base of the units is limited by the lateral sideways pressure that acts on the units This is due to earth and water pressure and the effects of surcharges on the surface The exact pressure from groundwater should be assessed on a site by site basis if groundwater is present above the base of the units Depth to Base If the depth to the base of the system is greater than 3 5 m please contact Hydro International for specific design assistance Installation with a depth to base of up to 6 m may be possible under certain conditions Backfill Cover Stormbloc should be installed with a minimum depth of cover of 500 mm under landscaped non trafficked areas to protect from damage with gardening or agricultural implements For installations where the system will be subject to loading from traffic the depth of cover should allow the dispersion of surface loading in particular point loads such that the loading to the top of the Stormbloc is distributed evenly and limited to no more than 275 kN m 27 tonnes m2 The material should be carefully compacted in layers to form a depth to suit the maximum expected loads please see Sections 11 and 12 for further information The total mass of ground cover above the modules should not exceed the maximum long term loading limit of 80 kN m 8 tonnes m This equates to up to 3 6 m of stone backfill maximum density of 2 2 t m As a general guide the following depths of
9. TENANCE IF REQUI A SINGLE RMBLOC IS SHOWN MULTIPLE LAYERS CAN ALSO Typical Stormbloc installation section where Stormbloc Inspect chambers are not utilised Liotta Ge SOULS nbus ribs bibana FACH HESPE TH HPO TBH CHAMBIB CATOH PIT ABD OR STORE Dia HALF MDIRLES TIME i BY OTHERS F amp TOURFBLOCA INSPECT Stema u ae FALH E NOT BEING USEDI tt HL UELL ILL IT TITT H 4 i ipM LET L 11 E 1 TITI LL TITHTTI LILI TID TIT n 1 1 H 1 1t UU HLH UL II ULI HS UU 1111 1 11 GEOTEXTLE HCHBRA TO BE CUT WHERE PPE ANS END PLATE EMD PLATES NOTE CHAMBERS PROVIDE ACCESS TO INTEGRA TUNNELS FOR INSPECTION amp MAINTENANCE IF REQUIRED Typical Stormbloc installation plan where Stormbloc Inspect chambers are not utilised Parts List Note Hydro International will calculate the correct quantity of components for your given tank size and supply them as part of your order for the Stormbloc modules Product Code Description 515 90 005 Stormbloc Module full block Mass 20 kg Fag Fa gn i d be ETSI Ts Eat bh d agi ed bf HEAR A TL LIT E SL E CY XA E 259g R a I fe Lr ET LITT ALT ELT E STILL SLT E AF i mea IL
10. ackfill above system system should be carried out using Type 1 or Type 2 sub base again in accordance with the SHW The initial 300 mm of cover over the blocks should be compacted using a vibration plate or other laminar working device Once this initial 300 mm of material is compacted other types of compaction plant can be used provided its mass per metre width is 2300 kg Once there is 500 mm of well compacted material above the blocks heavier compaction plant can run across the top of the system up to a maximum of 5000 kg mass per metre width In addition with this depth of cover tipper trucks and excavators can traverse over the top of the system provided that the wheel load for the vehicle does not exceed 50 kN fully loaded It is important to avoid turning the heavy machinery directly on top of the tank The tipper excavators should only traverse the tank in straight line passes If a change in Step 10 Finished surfacing direction is required then the machine should drive off the tank turn and drive back on in the correct direction It is also important to note that all of the backfill material should not be tipped moved to a single area and that it is spread over as large an area as possible All other construction plant should not traffic over the system unless assessment based on the Stormbloc maximum permissible loading characteristics demonstrate it is acceptable Cranes or their outriggers should not be used ov
11. ay be slippery particularly in wet or frosty conditions Single Layer Designs of 0 66 m Deep Modules Stormbloc modules on the bottom layer are connected with neighbouring rows using only the horizontal connecting pieces in the centre of each edge as shown in Section 4 2 page 11 Connections should only be made on the top of the modules ie connections are not required on the underside of the tank Single Layer Designs of 0 35 m Deep Modules The 0 35 m deep modules should be installed such that the text imprinted on the module is at the bottom edge The half block connectors should be located in the square openings at the top of the support pillars as shown in Section 4 2 page 11 Multi layer Designs For installations of multiple layers of 0 66 m deep modules or where 0 66 m modules and 0 35 m deep modules are used together the multi layer connectors should be used The 0 35 m deep modules should form Connections the top layer of the system and be oriented so that the text imprinted is at the bottom edge of the module Starting with the bottom layer the multi layer connectors should be used to connect the centre of each edge of neighbouring modules The modules of subsequent layers may then be located on the multi layer connectors Typical Installation Method Connector Type Application Requirement Single Layer For installations of one layer of On the top surface of the module 0 66 m modules in the centre o
12. ectly if you require a list of independent membrane specialists who have previous experience of Stormbloc installations Typical Installation Method 1 Transport Stormbloc is generally delivered with 4 No 0 66 m or 8 No 0 35 m deep modules packaged together The modules should preferably be unloaded with a forklift telehandler or other suitable lifting equipment The access tunnels of the lower modules can be used as the lifting points either by inserting the forks or by fastening with lifting belts or straps The modules should not be dropped or thrown from vehicles and impacts should be avoided Each 0 66 m deep module weighs 20 kg while each 0 35 m deep module weighs 12 kg making the blocks easy to manhandle 2 Storage For safety reasons no more than 2 packages 4 No 0 66 m or 8 No 0 35 m modules with a total height of no more than 2 7 m should be stacked one above the other In the event of a storm high winds the modules should be secured and if possible not stacked The modules can be stored outside however the storage time should be restricted to a maximum of one year During this time it is recommended that the material should be protected against direct exposure to sunlight store in the shade or cover with suitable material It is possible to move the module around the site by hand or with suitable equipment Before the system is installed the parts should be examined for damage sustained in trans
13. equired A flexible pipe coupling will be required to connect the pipe see page 18 for further information 150 mm to 500 mm ID Pipes If Stormbloc Inspects are used then the Stormbloc system can accept direct connections from 150 to 500 mm ID x NNN TYD LAL TTN LN AAA JN IND IN UNE NUN NA NI e z Fa J LA Fj LT TTT T INL NDT N ra N N N FIFA MIN INL NLIS L AL TL TALL TL LS LM TAL Du PE TNL Tail TAU N INTL N IN NUNN VAN INL A iv M aM mg mm mmm mmm ees Detail Design 4 4 Stormbloc Inspect Modules Access Chambers and Upstream Catchpits Stormbloc Inspect Modules The Stormbloc Inspect modules can be used in a number of ways to increase the accessibility of the Stormbloc system and for making inlet and outlet pipe connections Options i Inlet and Outlet Connection Points Stormbloc Inspect modules can be used as the main connection point for the inlet and outlet pipes The pipe can be connected at a high or low level using the cut out sections of the Stormbloc Inspect modules The maximum possible inside diameter of the pipes is 500 mm and up to 587 mm outside diameter ii Extension Piece The Stormbloc Inspect modules are supplied with an extension piece to take the inspection chamber up to ground level A pipe connection can be made directly to this extension piece giving the option of an inlet with a full 360 degree radiu
14. er the top of the Stormbloc system 13 Final Inspection Following the installation it is good practice to inspect all catchpits silt traps and inspection manholes to ensure they are free from construction debris and contamination Maintenance Instructions The patented inspection maintenance tunnels within each Stormbloc module allows almost the entire volume of the construct to be inspected via CCTV camera and flushed through A catchpit chamber immediately upstream of the system is recommended as this will reduce the amount of silt entering the installation For larger installations it may also be advantageous to add further catchpits to the system design or an advanced vortex silt trap such as the Downstream Defender by Hydro International The collection sump s should not be allowed to overfill as this will lead to silt carry over into the Stormbloc modules As all schemes are different the frequency at which the catchpit s should be emptied will need to be determined on site For small soakaways and individual infiltration tanks it will generally only be necessary to ensure that the catchpits silt traps are free from debris such as leaves or sediment It is recommended that any system be inspected no less frequently than at monthly intervals for the first 3 months and thereafter at 6 monthly intervals In addition it is suggested that the installation is inspected immediately following the first storm event whenev
15. er this should occur post installation Individual maintenance schedules should be drawn up using the information obtained from the initial inspections It should also be noted that more regular inspections may be required should the catchpit s fill more frequently and or if the initial inspections reveal that maintenance cleaning will be required more regularly than at six month intervals Flushing of the system can be achieved using a jetting system with a 150 bar pump pressure ie approximately 80 bar at the nozzle at a discharge flow of 300 l min The jet nozzle should be introduced to the system via the Stormbloc Inspect manhole and the integral inspection maintenance tunnel The silt should be flushed to the Stormbloc Inspect or catchpit manhole and removed from there References 1 Water Research Centre 2001 Sewers for Adoption 5th Edition 7 Construction Industry Research and Information 2 Department for Transport Local Government and the Regions 2001 Planning Policy Statement PPS Note 25 Development and Flood Risk 3 The Building Regulations 2000 amended 2001 Approved Document H3 4 British Standards Institute 1973 CP312 Part 1 1973 British Standard Code of Practice for Plastics Pipework Thermoplastics Material General Principles and Choice of Material 5 Building Research Establishment 1991 BRE Digest 365 Soakaway Design 6 Construction Industry Research and Association 1995 CIRIA Repo
16. f each edge that neighbours another module Multiple Layers For multiple layer installations On the top surface of the modules on the lower layer in the centre of each edge that neighbours another module Single Layer For installations of one layer of 0 35 m Located in the square pillars on the 0 35 m deep deep modules top plate of the modules modules 7 Stormbloc Inspect Chambers Where Stormbloc Inspect Chambers are incorporated in the system design these should be located within the excavation for the Stormbloc and fully contained within the membrane geotextile liner The pre cut square openings should be orientated to line up with the tunnel sections of the Stormbloc modules and any pipes connected to the adapters provided For multiple layer systems care should be taken to ensure that the individual chamber components are installed in the correct order The top surface of the installation should be covered by the membrane geotextile before the cone is placed on the shaft Once the cone is located in position an opening can be cut in the membrane and the extension shaft located on the cone The extension shafts are supplied in 1 m 2 m or 3 m lengths as standard to be specified at time of order but can be cut on site to suit the depth of the installation The extension shaft has an internal diameter of 500 mm and an external diameter of 600 mm A cover frame and support ring not supplied should be f
17. ground cover above the Stormbloc modules should be adhered to according to the likely traffic loading Loading Class Minimum Ground Cover Landscaped area with no access for vehicular traffic Roads and HGV loading yards traffic loading 44 t 1000 mm The actual loading rate on the modules should always be checked by the system designer The material used for the construction above the Stormbloc system should be selected according to the surface loadings A non angular granular material nominally 100 mm thick should be used immediately next to the geotextile or membrane surrounding the system so as to protect it from puncturing Alternatively a geotextile fleece may be used Detail Design 3 5 Gradient Stormbloc can be laid to a gradient to aid the flow of stormwater through the system Stormbloc has however been designed and developed to provide resistance to loads applied predominantly in the vertical plane Laying Stormbloc to a gradient will therefore slightly reduce the transient and long term loads that the system can withstand Gradients of 1 100 should generally not be exceeded 3 6 Flotation If itis necessary to install a Stormbloc system within the groundwater table then flotation needs to be considered In simple terms there needs to be a greater force acting over the system ie the weight of the backfill to compensate for the up thrust caused by buoyancy This should be checked by the system designer
18. hat incorporate more than one layer the multiple layer connector 2 should be used to join the layers in place Single Layer Designs 0 35 m Deep Modules For 0 35 m deep Stormbloc modules in a single layer design the half block layer connectors 3 should be located in the square openings at the top of the support pillars as shown below Connectors Plan View Showing Location of Connectors for 0 35 m deep modules 3 Single Layer 0 35 m deep modules For installations of one layer of 0 35 m modules In the square pillars on the top plate of the modules E At i Detail Design 4 3 End Plates and Pipe Adapters All tunnel ends should be covered with an end plate to prevent backfill entering the modules Where pipe connections are required modified end plates are provided depending on the size of pipe used Snap loc End Plates End plates are used where no pipe entry is required into a tunnel These plates simply snap into position and take seconds to locate 100 to 150 mm ID Pipes If a 100 or 150 mm diameter pipe is used a snap loc end plate with the appropriate size hole will be provided A pipe spigot is also provided to ensure a positive connection between the pipe and the Stormbloc module Provided that pipe details are confirmed at the time of order these holes will be pre cut in the end plate prior to arrival on site 225 mm ID Pipes For 225 mm pipe connections a special adapter plate is r
19. ilable if required The use of good engineering practice and awareness of the limitations of all materials used will avoid construction and operational problems Hydro International has an expert and dedicated workforce capable of providing advice on many aspects of system design Design Steps Summary 1 Storage Volume Calculation Calculation of required storage volume 2 Location and Layout Selection of the most appropriate location according to loading rates soil types adoption constraints and the position of the water table 9 Depth and Dimensions of the System Identification of the plan area cross sectional area depth to invert and depth of cover 3 1 Depth of subgrade layer Lateral loadings Depth to base 3 4 Backfill cover depth Gradient Flotation 4 Designing the Stormbloc Tank 4 1 Stormbloc modules selection of the most suitable Stormbloc sizes and configurations 4 2 Connection pieces identification of connection pieces and endplates required 4 3 End plates and pipe adapters 4 4 Stormbloc Inspect modules access chambers and upstream catchpits 4 5 Inlet outlet and vent pipe requirements 4 6 Geotextile and membrane protection Detail Design 1 Storage Volume Calculation The system designer needs to calculate the volume of l storage required There are a number of suitable methods Design Requirements that can be used to calculate the storage volume
20. ion with CCTV cameras maintenance and cleaning if required Advantages ww 099 Fully accessible for inspection and maintenance through the patented 222 mm x 570 mm tunnel within the blocks High void ratio 9596 high storage volume an 800 mm x 800 mm x 660 mm block holds 0 401 m of stormwater Lightweight with high strength Zero instances of failure extensive track record in the UK and Europe Strong enough to be used under trafficked areas including roads and HGV areas BBA certification pending Delivery generally 1 2 weeks Simple and quick to install Shallower 350 mm deep blocks available ALT h LAM nn VV A na Physical Properties E rario at sect Deon eeo 39 Ultimate Compressive Strength 330 kN m Short Term Vertical Characteristic 275 kN m Strength at Yield Short Term Horizontal Characteristic 100 kN m Strength at Yield Long Term Vertical Compressive 80 kN m Strength otructural Testing Stormbloc has undergone extensive 3rd party structural testing and FEA modelling to ensure that it is capable of withstanding the high loading forces that are likely to occur under heavily trafficked areas as well as long term loading imposed by the ground cover above the system The modules are manufactured in accordance with ISO 9001 2000 and are constantly monitored and tested to ensure that they are free from defects otormbloc Inspect Unrivalled Acce
21. it storage 3 Excavation The area for the installation should be excavated according to the design If the maximum depth from finished cover level to the base of the Stormbloc is greater than 3 5 m structural support to the tank may be required and advice should be sought from Hydro International Step 1 Excavation 4 Sub Base The base of the excavation should have a sand or gravel subgrade layer This should be approximately 100 mm deep and be flat and even Extra care may need to be taken with this subgrade layer for larger installations particularly for multi layered designs Step 2 Lay sub base Ip PO T 5 Geotextile Membrane The entire system is to be wrapped with a suitable geotextile for infiltration applications or a suitable membrane for attenuation systems please refer to Section 4 6 page 15 Before the modules are installed the geotextile membrane should be laid over the subgrade level The sheet s of geotextile membrane should be Step 3 Lay geotextile membrane large enough such that it can lap over the edge of the modules by at least 200 mm D Stormbloc Modules and Connections The base layer of modules should be laid onto the geotextile following the layout as shown on the design They should be laid such that the inspection tunnels are in line creating access throughout the length of the system Care should be taken when walking on the Stormbloc modules as they m
22. itted to the top of the extension shaft such that any traffic loadings are transmitted to the support ring rather than exerted directly onto Step 4 Lay first layer of Stormbloc modules the extension shaft and Stormbloc Inspect Step 5 Lay second layer of Stormbloc modules Typical Installation Method 8 End Plates All tunnel ends should be covered with an end plate Snap loc end plates will be provided to cover the tunnel openings where no pipe connections are to be made It is possible to cut 100 mm 150 mm or 200 mm holes in these plates using the circular templates On provision of the pipe details number type and outside diameter the end plates can be delivered to site with pre cut holes and adapters to suit the inlet outlet and vent pipe connections This information should be Taataa si AV aaa provided at the time of order to ensure the correct number and type of end plates and adapters are included with the deliveries Failure to provide this information will result in only standard snap loc end plates being provided For pipe connections of 150 mm or less the snap loc end plates can be cut with the appropriate holes and an adapter socket with a 150 mm ID can be provided to make a positive connection between the pipe and the Stormbloc module If required a flexible pipe coupling by others can be used to secure the pipe to the socket For 225 mm diameter pipe connections an alternative
23. n and depth of the system If a combination of full blocks 660 mm deep and half blocks 350 mm deep are being used then the half blocks must form the top layer of the system orientated so that the text imprinted on the half block is at the bottom edge Detail Design 4 2 Connection Pieces There are three types of connection pieces that are used with the Stormbloc modules The number of connection pieces required for single and multi layered designs are shown in the table below Single Layer Designs 0 66 m deep modules Stormbloc modules on single layer designs are connected with neighbouring rows using only the single layer horizontal connecting pieces 1 in the centre of each edge that neighbours another module The horizontal connecting pieces should be laid alternately lengthwise and crosswise as shown below Connectors FARE E M Qe maia E HEEE Plan View Showing Location of Connectors for 0 66 m deep modules 1 Single Layer 0 66 m deep modules Connector Types For installations of one layer of 0 66 m modules O 2 Q Q 7 On the top surface of the module in the centre of each edge that neighbours another module module Requirement 2 Multiple Layers 0 66 m deep modules For multiple layer installations On the top surface of the modules on the lower layer in the centre of each edge that neighbours another Multi Layer Designs For designs t
24. nted Pipe connections can be made from multiple directions into the Stormbloc system The use of Stormbloc Inspect Chambers provides a continuous flow path through the system regardless of changes of flow direction and offers access for inspection maintenance at critical points eg inlet change of flow direction The Stormbloc system can be installed practically anywhere including under roads footpaths car parks public open spaces landscaped areas gardens tennis courts and playing fields For infiltration systems consideration should be given to the soil conditions of the intended location of the tank The soil should have a suitable percolation rate typically 0 05 m hr should be free of contaminants and should not have a high groundwater level 3 Detail Design Depth and Dimension of the System The Stormbloc system is highly flexible and allows the system designer to consider a range of options not normally available with other storage systems There are however certain limiting factors that need to be considered 3 1 3 2 3 3 3 4 Depth of Subgrade Layer The base of the excavation should form a sound working platform and have a sand or gravel subgrade layer to provide a level support base for the system This should be at least 100 mm deep and be flat and even Extra care should be given to this subgrade layer for larger installations and in particular for multilayered designs Lateral
25. riation in the physical properties of available geotextiles and membranes which should be selected according to specific site conditions For illustrative purposes some of the key characteristics of typical geotextiles suitable for use with Stormbloc Infiltration systems are given in the table below Non Woven Geotextile Physical Properties for Infiltration Systems Water Permeability ei Minimum CBR Puncture Resistance N Minimum Weight aim Note Figures taken from manufacturer s data sheet Potential purchasers specifiers are advised to check that this information has not been superseded and should satisfy themselves that the chosen geotextile is fit for the intended USE The geotextile should have a greater permeability than that of the surrounding soll Impermeable Membrane Physical Properties for Storage Attenuation Note Figures taken from manufacturer s data sheet Potential purchasers specifiers are advised to check that this information has not been superseded and should satisfy themselves that the chosen geomembrane is fit for the intended use As a minimum the membrane should be joined using a suitable double sided jointing tape For installations where there is a risk of contaminants within the surrounding ground or where the groundwater level is above the base of the system advice on suitable membrane with welded joints should be sought from a specialist supplier please contact Hydro International dir
26. rom a suitable location on the surface such as via Stormbloc Inspect Chambers manholes or rodding points Traditional catchpits or silt traps are not very effective at preventing finer particles from entering any system and any trapped material can often be re entrained during subsequent storm events and passed into the infiltration or storage media It is however still good practice to include catchpits silt traps prior to any infiltration or storage system Any chambers or manholes immediately upstream of a Stormbloc installation should preferably be built as catchpits or silt traps to capture larger or settleable material Where Stormbloc Inspect Chambers cannot be used the manhole chambers adjacent to the Stormbloc system provide access through the inlet pipes to the tunnels for inspection and maintenance If required a complete treatment train approach can be provided with the use of the Downstream Defender and Up Flo Filter products which remove a wide range of pollutants including floatable debris sediments nutrients metals oils grease organics and bacteria see below Downstream Stormbloc Hydro Brake Up Flo Filter Defender Flow Control Hydro International s Complete Stormwater Management System 4 5 Inlet Outlet and Vent Pipe Requirements The size and number of pipes being connected to the system should be sufficient to be able to convey the maximum expected flow rates from the site into the modules witho
27. rt 156 Infiltration Drainage Manual of Good Practice Information Association 1997 The SUDS Manual C 697 8 Micro Drainage The Micro Drainage Suite of Programs Website www microdrainage co uk 9 Hydro International Stormcel User Manual 10 Hydro International Stormwater Package Brochure 11 WTB Geotechnics SC Membrane Technical Data Sheet 12 WTB Geotechnics AZTEX SPR14 Geotextile Technical Data Sheet Typical Installation Drawings IMPERMEABLE MEMBRANE END PLATES STORMBLOCe MODULES GEOTEXTILE PIPE ADAPTERS 800mm x 800mm x 660mm EACH SURROUNDING ENTIRE SYSTEM BY OTHERS VENT PIPE SIZE AND NUMBER TO SUIT DESIGN J EzmzmEZ Emm 5 22 2556 el elc z m Gei WA Sa Se ESL 525252 CH Een SI Za SE CSE EWEN ELLE 5 2 5 ZS ei aS EE PSPSPS 2 DLL c Ls LL aS E Ka ESI Say EH Pa Ps LE beb cy CICI Cok ok Scc PSZS2S g EE KE Kr we SV S3 SZ 2 Been Een PSDSDS PSPSPS PSE P lt P lt P lt D ASP PSPSPS PSPSPS PSPEDS P lt P lt P lt PPI lt lt SUBGRADE LAYER OPTIONAL CUT OUT DISTRIBUTION PIPE SAND OR GRAVEL SIDE PIPE LOCATORS SIZE AND NUMBER TO min DEPTH 100mm SUIT DESIGN BY OTHERS SE GE TO BE CUT WHERE PIPE JOINS END PLATE IF STORMBLOC INSPECT IS NOT BEING USED CHAMBERS PROVIDE ACCESS TO INTEGRAL ELS FOR INSPECTION amp MAIN
28. s iii Location Stormbloc Inspect modules can be installed at any point within the system to give access to the tunnels or to make a pipe connection on the side of the system iv Catchpit Receptacle Stormbloc Inspect modules can be used to form a catchpit receptacle within the system v Flow Path Direction Changes in direction of the main flow path can be accommodated using a Stormbloc Inspect Chamber allowing a continuous dedicated flow path and access directly to the point of the change of direction ET n Tatty TUPI A INTER PIS Tita LIT n I BEER Veti ne LII LII See ee OEE a TET OP E TIT IILE TUTTI TIR aN Sale ae zl o seno arraren nmn T i UL PTET ETER TEI IRU H L ETETE FERETE t RER x E P Lu e Goler ETER TTT inn LI UU 4 HTHETTEITHETHITIE LIT HUE Extension Piece Inlet on 5 Extension Piece an 7 4 360 rotatable HE EEN WERL Inlet Low Level Inlet ee vf EEE EEE EEE E HEE HHH E H Connection s up Connection H Je e THE TR E to 500 mm ID e F 1 A FE li sp Plan and Section of Stormbloc System Showing Different Connection Possibilities Using Stormbloc Inspect Detail Design Catchpits and Inspection Maintenance Access The Stormbloc system is directly accessible for maintenance and inspection via the patented access tunnel within each block Access to these tunnels should be provided f
29. s committed to providing integrated products and solutions that support Sustainable Drainage Systems In addition to Stormbloc and Stormbloc Inspect Hydro International also provides other solutions for commercial developers and designers Combined our products provide comprehensive sustainable solutions to meet the most stringent regulations Our Stormwater Product Portfolio includes Stormbloc Stormwater Storage and Infiltration System A block type structure with a patented maintenance inspection tunnel for aa providing underground surface water infiltration and storage systems Stormbloc Inspect A stackable modular access unit offering unrivalled accessibility to any Stormbloc installation Stormcell and Stormcell Lite Stormwater Storage Systems A low cost underground storage system suitable for installation beneath roads car parks and amenity areas Stormcell is installed utilising a patented pipework system which prevents the entry of silts and grits into the storage volume StormBank Rainwater Harvester The latest addition to the stormwater range of products The StormBank can be used to replace treated mains water for use in toilets garden and outdoor use StormBank Pro for large commercial developments and StormBank Garden exclusively for garden watering are also available Hydro Brake Flow Control A self activating vortex flow control that provides
30. see references These vary from relatively simple manual To be able to carry out storage calculations we require methods to sophisticated simulation models the following site specific information As part of Hydro Internationals free design service we offer Infiltration Systems an estimated storage volume using the industry standard 1 Design Kee Period drainage modelling software suite WinDes 2 Site Location 51 Drained Impermeable Area 4 Soil Infiltration Rate General design guidance on modelling of Stormbloc and Hydro Brake Flow Controls can also be found on our Storage Systems Design Return Period website www hydro international biz Site Location 2 3 Drained Impermeable Area 4 Maximum Allowable Discharge Rate The soil infiltration rate should be derived from a site porosity test using a recognised method eg BRE digest 365 2 Location and Layout Consider the most appropriate and cost effective location for the infiltration storage facility The flexibility afforded by Stormbloc combined with the substantial reduction in volume required when compared with gravel pits for instance allows the design of storage into locations that would be impractical for traditional systems Due to the modular nature of the system Stormbloc can be assembled to virtually any size shape depth or configuration and obstructions such as trees pipework and rock outcrops can easily be circumve
31. ssibility for Stormbloc Installations Advantages Product Profile e The Stormbloc Inspect has the same dimensions The Stormbloc Inspect offers an unrivalled level as the Stormbloc modules and is fully stackable of accessibility to any Stormbloc installation This o Can be integrated within all Stormbloc modular access chamber sited within the tank has installations identical dimensions to a Stormbloc module and e The volume of Stormbloc Inspect contributes to the so can easily be incorporated into the layout of the required storage capacity infiltration or storage system Each unit has an inlet side for optimum pipe connection into the Stormbloc installation Each Stormbloc Inspect unit offers connection points High and low level inlet connections possible on all four sides for direct access to the inspection 0 Can accept inlet outlet connections up to 500 mm tunnels on the Stormbloc modules or for connection internal diameter of inlet and outlet pipes to the system at any point e Enables optimum accessibility for inspection and maintenance Excellent access to the installation via 500 mm internal diameter extension shaft to ground level e Reduces need for separate manhole chambers e The use of a standard vented manhole cover in conjunction with the Stormbloc WA mmm Inspect unit removes the need for separate ventilation structures Extension Shaft 500 mm ID Reduces installation
32. superior hydraulic performance over conventional flow regulators with _ patented features that reduce maintenance requirements Our STH range of Hydro Brake s is na CERRIESCREIOA IH FREAIT Fi eee STH Range of flow control Hydro Brake Flow Controls the only BBA Approved vortex Downstream Defender An advanced hydrodynamic vortex separator designed to remove sediment floatables and associated pollutants from stormwater Up Flo Filter A high rate modular stormwater treatment filter featuring a patented upward flow path with a unique Drain Down design The filter targets a wide range of pollutants including floatable debris fine sediments nutrients metals oils and grease organics and bacteria Save the Rain Campaign Save the Rain is a major campaign to make water saving second nature in every UK household and protect Britain s dwindling water resources The campaign is being run in association with British Water and the UKRHA and is sponsored by Hydro International Visit www savetherain info Stormbloc What is it Stormbloc is a cellular block type structure used for providing below ground surface water infiltration or storage The unique advantage of Stormbloc over other crate type systems on the market is the patented inspection maintenance tunnel through each block offering clear flow paths through the system This allows for inspect
33. ther 94 Hutchins Drive Portland ME 04102 Tel 1 207 756 6200 Fax 1 207 756 6212 Hydro International Wastewater 2925 Aloclek Drive Suite 140 Hillsboro OR 97124 Tel 1 503 615 8130 Fax 1 503 615 2906 2009 Hydro International All rights reserved STBUM B 0209 lreland HRD Technologies Tootenhill House Rathcoole Co Dublin Tel 353 0 1 4013964 Fax 353 0 1 4013978 UKAS ENVIRONMENTAL MANAGEMENT QUALITY MANAGEMENT Certificate No 0961366
34. ut restriction Typically the inlet pipes and outlet pipes for an on line storage system will be connected to the lower tunnel on the modules and a vent pipe will be connected to the upper tunnel Using standard end plates the maximum pipe size that can be connected is 150 mm internal diameter However using the 225 mm pipe connector a 225 mm internal diameter pipe can be attached and pipes up to 500 mm internal diameter can be connected via a Stormbloc Inspect Chamber Pipes can also be connected to the side of the Stormbloc modules using the optional cut out piece incorporated into each module This can accommodate a maximum outside pipe diameter of 180 mm Provided ventilated covers are used vent pipes allow the system to fill with stormwater without restriction by allowing displaced air to escape through the adjacent access chambers As a general rule of thumb the number of 100mm diameter vent pipes required should equal the number of inlet pipes entering the Stormbloc system If Stormbloc Inspects are used then vent pipes are not required as the Stormbloc Inspect modules will allow the system to vent directly to atmosphere again provided ventilated covers are used Detail Design 4 6 Geotextile and Membrane Protection Depending upon the application the entire system should be wrapped with either a suitable geotextile for infiltration or an impermeable membrane for storage attenuation There is a great degree of va
35. with a minimum depth of cover of 500 mm to protect from future damage with gardening or agricultural implements Care needs to be taken during the construction phase and consideration given to the effects of site traffic when minimal depths of cover are used It is recommended that the backfill material be compacted in order to avoid differential settling Construction Methods Above the Stormbloc Modules Trafficked Areas Where Stormbloc is used beneath trafficked areas selection and compaction of the fill above and around the units is particularly important Whilst we make general recommendations on the type of fill required the engineer has overall responsibility and can substitute this with other material depending on the required engineering performance of the sub base road construction above In either instance we recommend that sidefill and backfill are selected and compacted in accordance with the SHW The Stormbloc system should be installed as detailed in this manual and encapsulated in an impermeable membrane and protective geotextile fleece where appropriate or permeable geotextile We recommend that the fill to the sides of the system should be Type 1 or Type 2 granular sub base or Class 6P selected granular material as defined in the SHW This material is compacted in 150 mm layers and installed in accordance with tables 6 1 or 8 1 of the SHW We recommend that the backfill over the top of the Stormbloc Step 9 B
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