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Home My WebLink About11_D4_STORMWATER CHAMBER DETAILS_05082021.pdf CMP DETENTION SYSTEM INSPECTION AND CMP DETENTION INSTALLATION GUIDE IN—SITU TRENCH WALL MAINTENANCE WHEN FLOWABLE FILL IS USED,YOU MUST PREVENT PIPE FLOATATION. PROPER INSTALLATION OF A FLEXIBLE UNDERGROUND DETENTION SYSTEM IF EXCAVATION IS REQUIRED,THE TRENCH WALL NEEDS TO BE CAPABLE OF TYPICALLY,SMALL LIFTS ARE PLACED BETWEEN THE PIPES AND THEN UNDERGROUND STORMWATER DETENTION AND INFILTRATION SYSTEMS MUST WILL ENSURE LONG-TERM PERFORMANCE.THE CONFIGURATION OF THESE SUPPORTING THE LOAD THAT THE PIPE SHEDS AS THE SYSTEM IS LOADED. IF ALLOWED TO SET-UP PRIOR TO THE PLACEMENT OF THE NEXT LIFT. THE BE INSPECTED AND MAINTAINED AT REGULAR INTERVALS FOR PURPOSES OF SYSTEMS OFTEN REQUIRES SPECIAL CONSTRUCTION PRACTICES THAT SOILS ARE NOT CAPABLE OF SUPPORTING THESE LOADS,THE PIPE CAN DEFLECT. ALLOWABLE THICKNESS OF THE CLSM LIFT IS A FUNCTION OF A PROPER PERFORMANCE AND LONGEVITY. BALANCE BETWEEN THE UPLIFT FORCE OF THE CLSM,THE OPPOSING PERFORM A SIMPLE SOIL PRESSURE CHECK USING THE APPLIED LOADS TO DIFFER FROM CONVENTIONAL FLEXIBLE PIPE CONSTRUCTION.CONTECH WEIGHT OF THE PIPE,AND THE EFFECT OF OTHER RESTRAINING INSPECTION ENGINEERED SOLUTIONS STRONGLY SUGGESTS SCHEDULING A DETERMINE THE LIMITS OF EXCAVATION BEYOND THE SPRING LINE OF THE MEASURES. THE PIPE CAN CARRY LIMITED FLUID PRESSURE WITHOUT PRE-CONSTRUCTION MEETING WITH YOUR LOCAL SALES ENGINEER TO OUTER MOST PIPES. PIPE DISTORTION OR DISPLACEMENT,WHICH ALSO AFFECTS THE CLSM INSPECTION IS THE KEY TO EFFECTIVE MAINTENANCE OF CMP DETENTION LIFT THICKNESS.YOUR LOCAL CONTECH SALES ENGINEER CAN HELP SYSTEMS AND IS EASILY PERFORMED.CONTECH RECOMMENDS ONGOING, DETERMINE IF ADDITIONAL MEASURES,NOT COVERED IN THIS GUIDE,ARE IN MOST CASES THE REQUIREMENTS FORA SAFE WORK ENVIRONMENTAND DETERMINE THE PROPER LIFT THICKNESS. ANNUAL INSPECTIONS.SITES WITH HIGH TRASH LOAD OR SMALL OUTLET APPROPRIATE FOR YOUR SITE. PROPER BACKFILL PLACEMENT AND COMPACTION TAKE CARE OF THIS CONCERN. CONTROL ORIFICES MAY NEED MORE FREQUENT INSPECTIONS.THE RATE AT a� BACKFILL-WELL GRADED WHICH THE SYSTEM COLLECTS POLLUTANTS WILL DEPEND MORE ON SITE FOUNDATION LIVE LOAD 4'GRANULAR AND SMALLER STAGE POURS AS REQUIRED TO SPECIFIC ACTIVITIES RATHER THAN THE SIZE OR CONFIGURATION OF THE CONSTRUCT A FOUNDATION THAT CAN SUPPORT THE DESIGN LOADING CONTROL FLOATATION AND PIPE SYSTEM.///// ///�/i DISTORTION/DISPLACEMENT EMBANKMENT CLSM APPLIED BY THE PIPE AND ADJACENT BACKFILL WEIGHTAS WELL AS MAINTAIN ITS INTEGRITY DURING CONSTRUCTION. \\%/\\%/ \%/\/\ /!\/\// !\ \\/! EMBANKMENT INSPECTIONS SHOULD BE PERFORMED MORE OFTEN IN EQUIPMENT jABovEAND BELOW \\\\ TION \/\/\ WASHDOWN AREAS,IN CLIMATES WHERE SANDING AND/OR SALTING IF SOFT OR UNSUITABLE SOILS ARE ENCOUNTERED,REMOVE THE POOR \\ \j\,\\/\\/\\/\\/\\/\ /\\/\/\/\\/\\ \\/\\/\\/\\/\\/\/\ BEDDING)WITH UNIFORMLY /i/%// j/j/j OPERATIONS TAKE PLACE,AND IN OTHER VARIOUS INSTANCES IN WHICH ONE SOILS DOWN TO A SUITABLE DEPTH AND THEN BUILD UP TO THE \\/// //////////// /////////////////////////// GRADED BEDDING LAYER. //\\//\\/j \\//\\//� WOULD EXPECT HIGHER ACCUMULATIONS OF SEDIMENT OR ABRASIVE/ •.• ". \j�\jam\ APPROPRIATE ELEVATION WITH A COMPETENT BACKFILL MATERIAL.THE BEDDING-WELL GRADED CORROSIVE CONDITIONS.A RECORD OF EACH INSPECTION IS TO BE STRUCTURAL FILL MATERIAL GRADATION SHOULD NOT ALLOW THE GRANULARAND SMALLER j\� / ////�/\\\///// / ///// / / /j/ / / /j/�/ /j MAINTAINED FOR THE LIFE OF THE SYSTEM MIGRATION OF FINES,WHICH CAN CAUSE SETTLEMENT OF THE DETENTION WEIGHTED PIPE WITH MOBILE SYSTEM OR PAVEMENTABOVE. IF THE STRUCTURAL FILL MATERIAL IS NOT CONCRETE BARRIERS COMPATIBLE WITH THE UNDERLYING SOILS AN ENGINEERING FABRIC SHOULD BACKFILL PLACEMENT (OR OTHER REMOVABLE WEIGHTS) MAINTENANCE BE USED AS A SEPAR SOME CASES,USING A STIFF REINFORCING CMP DETENTION SYSTEMS SHOULD BE CLEANED WHEN AN INSPECTION GEOCURF6gWpl �/€j EX VATIO 194Y LACEMENT FILL QUANTITIES. MATERIAL SHALL BE WORKED INTO THE PIPE HAUNCHES BY MEANS OF THE AMOUNT OF UNDERCUT GEOGRID WASN'T USED REVEALS ACCUMULATED SEDIMENT OR TRASH IS CLOGGING THE DISCHARGE SHOVEL-SLICING,RODDING,AIR TAMPER,VIBRATORY ROD,OR OTHER EFFECTIVE EMBANKMENT METHODS. CONSTRUCTION LOADING ORIFICE. \ \ \ \ \ \\ MAXIMUM UNBALANCE LIMITED ACCUMULATED SEDIMENT AND TRASH CAN TYPICALLY BE EVACUATED T02 LIFTS(APPROX.i6") TYPICALLY,THE MINIMUM COVER SPECIFIED FOR A PROJECTASSUMES H-20 //\\//\\// THROUGH THE MANHOLE OVER THE OUTLET ORIFICE.IF MAINTENANCE IS NOT j //i/i / i / LIVE LOAD.BECAUSE CONSTRUCTION LOADS OFTEN EXCEED DESIGN LIVE r! I x _----- _----- / / \ \ \\\\\EMBANKMENT PERFORMED AS RECOMMENDED,SEDIMENT AND TRASH MAY ACCUMULATE IN ////i\//i////i//i//i//i -- -- - ----/_lmi\// `\\/\\// PIPEA (PIPE PIPEC PIPED \\/\\/ LOADS,INCREASED TEMPORARY MINIMUM COVER REQUIREMENTS ARE FRONT OF THE OUTLET ORIFICE.MANHOLE COVERS SHOULD BE SECURELY �ivv/vv/v%v v/v% vv%vvwv/�/ vv�/v%wv ivviv�/�v�Ivv/vv/ �i�/i�/i // GEOGRID ij/ij/ij //�//�� NECESSARY.SINCE CONSTRUCTION EQUIPMENT VARIES FROM JOB TO JOB, SEATED FOLLOWING CLEANING ACTIVITIES.CONTECH SUGGESTS THAT ALL BEDDING unNsuRne�esoIRSPLACE A vA/vA/vA/vA/vA/vA/vA/vA/vA/vA/vA/vA/vA/vA/ /vA/vA IT IS BEST TOADDRESS EQUIPMENT SPECIFIC MINIMUM COVER OR NEAR THE INLETANDSYSTEMS BE DESIGNED�THE OUTLET ORIFITH AN NSPECTION CE.SHOULD T BEOLE SITUATED AT NECESSARY O REQUIREMENTS WITH YOUR LOCAL CONTECH SALES ENGINEER DURING GET INSIDE THE SYSTEM TO PERFORM MAINTENANCE ACTIVITIES,ALL GRADE THE FOUNDATION SUBGRADE TO A UNIFORM OR SLIGHTLY SLOPING 8"LOOSE LIFTS BEDDING YOUR PRE-CONSTRUCTION MEETING. APPROPRIATE PRECAUTIONS REGARDING CONFINED SPACE ENTRY AND OSHA REGULATIONS SHOULD BE FOLLOWED. GRADE.IF THE SUBGRADE IS CLAY OR RELATIVELY NON-POROUS AND THE CONSTRUCTION SEQUENCE WILL LAST FOR AN EXTENDED PERIOD OF TIME, ANNUAL INSPECTIONS ARE BEST PRACTICE FOR ALL UNDERGROUND SYSTEMS. IT IS BEST TO SLOPE THE GRADE TO ONE END OF THE SYSTEM.THIS WILL IF AASHTO T99 PROCEDURES ARE DETERMINED INFEASIBLE BY THE DURING THIS INSPECTION,IF EVIDENCE OF SALTING/DE-ICING AGENTS IS ALLOW EXCESS WATER TO DRAIN QUICKLY,PREVENTING SATURATION OF THE GEOTECHNICAL ENGINEER OF RECORD,COMPACTION IS CONSIDERED ADDITIONAL CONSIDERATIONS OBSERVED WITHIN THE SYSTEM,IT IS BEST PRACTICE FOR THE SYSTEM TO BE SUBGRADE. ADEQUATE WHEN NO FURTHER YIELDING OF THE MATERIAL IS OBSERVED RINSED,INCLUDING ABOVE THE SPRING LINE SOON AFTER THE SPRING THAW UNDER THE COMPACTOR,OR UNDER FOOT,AND THE GEOTECHNICAL BECAUSE MOST SYSTEMS ARE CONSTRUCTED BELOW-GRADE,RAINFALL AS PART OF THE MAINTENANCE PROGRAM FOR THE SYSTEM. ENGINEER OF RECORD(OR REPRESENTATIVE THEREOF)IS SATISFIED WITH THE LEVEL OF COMPACTION. CAN RAPIDLY FILL THE EXCAVATION;POTENTIALLY CAUSING FLOATATION GEOMEMBRANE BARRIER AND MOVEMENT OF THE PREVIOUSLY PLACED PIPES.TO HELP MITIGATE MAINTAINING AN UNDERGROUND DETENTION OR INFILTRATION SYSTEM IS POTENTIAL PROBLEMS IT IS BEST TO START THE INSTALLATION AT THE EASIEST WHEN THERE IS NO FLOW ENTERING THE SYSTEM.FOR THIS , A SITE'S RESISTIVITY MAY CHANGE OVER TIME WHEN VARIOUS TYPES OF FOR LARGE SYSTEMS,CONVEYOR SYSTEMS,BACKHOES WITH LONG REASON,IT IS A GOOD IDEA TO SCHEDULE THE CLEANOUT DURING DRY SALTING AGENTS ARE USED,SUCH AS ROAD SALTS FOR DEICING AGENTS.IF REACHES OR DRAGLINES WITH STONE BUCKETS MAY BE USED TO PLACE DOWNSTREAM END WITH THE OUTLET ALREADY CONSTRUCTED TO ALLOW WEATHER. BACKFILL. ONCE MINIMUM COVER FOR CONSTRUCTION LOADING ACROSS A ROUTE FOR THE WATER TO ESCAPE.TEMPORARY DIVERSION MEASURES SALTING AGENTS ARE USED ON OR NEAR THE PROJECT SITE,A THE ENTIRE WIDTH OF THE SYSTEM IS REACHED,ADVANCE THE EQUIPMENT THE FOREGOING INSPECTION AND MAINTENANCE EFFORTS HELP ENSURE GEOMEMBRANE BARRIER IS RECOMMENDED WITH THE SYSTEM.THE TO THE END OF THE RECENTLY PLACED FILL,AND BEGIN THE SEQUENCE MAY BE REQUIRED FOR HIGH FLOWS DUE TO THE RESTRICTED NATURE OF UNDERGROUND PIPE SYSTEMS USED FOR STORMWATER STORAGE CONTINUE GEOMEMBRANE LINER IS INTENDED TO HELP PROTECT THE SYSTEM FROM AGAIN UNTIL THE SYSTEM IS COMPLETELY BACKFILLED.THIS TYPE OF THE OUTLET PIPE. TO FUNCTION AS INTENDED BY IDENTIFYING RECOMMENDED REGULAR THE POTENTIAL ADVERSE EFFECTS THAT MAY RESULT FROM THE USE OF CONSTRUCTION SEQUENCE PROVIDES ROOM FOR STOCKPILED BACKFILL INSPECTION AND MAINTENANCE PRACTICES.INSPECTION AND MAINTENANCE DIRECTLY BEHIND THE BACKHOE,AS WELLAS THE MOVEMENT OF CATCH BASIN RELATED TO THE STRUCTURAL INTEGRITY OF THE PIPE OR THE SOUNDNESS SUCH AGENTS INCLUDING PREMATURE CORROSION AND REDUCED ACTUAL CONSTRUCTION TRAFFIC.MATERIAL STOCKPILES ON TOP OF THE INLET OF PIPE JOINT CONNECTIONS IS BEYOND THE SCOPE OF THIS GUIDE. q E'0R6k'tFT-'S ENGINEER OF RECORD IS TO EVALUATE WHETHER SALTING BACKFILLED DETENTION SYSTEM SHOULD BE LIMITED TO 8-TO 10-FEET HIGH WATER _WATER PAVED PARKING LOT AGENTS WILL BE USED ON OR NEAR THE PROJECT SITE,AND USE HIS/HER AND MUST PROVIDE BALANCED LOADING ACROSS ALL BARRELS.TO BEST JUDGEMENT TO DETERMINE IF ANY ADDITIONAL PROTECTIVE DETERMINE THE PROPER COVER OVER THE PIPES TO ALLOW THE MEASURES ARE REQUIRED.BELOW IS ATYPICAL DETAIL SHOWING THE MOVEMENT OF CONSTRUCTION EQUIPMENT SEE TABLE 1,OR CONTACT YOUR PLACEMENT OF A GEOMEMBRANE BARRIER FOR PROJECTS WHERE SALTING LOCAL CONTECH SALES ENGINEER. WATER ELEVATION IN DETENTION SYSTEM AGENTS ARE USED ON OR NEAR THE PROJECT SITE. FINISHED FUNCTIONING SYSTEM 20 MIL PE IMPERMEABLE TYPICAL BACKFILL SEQUENCE OUTLET CONTROL 18 12'FOR iT'e-g6'mI LINER OVER TOP OF PIPE 6FOR tg2-ANO>t LIMITS OF \ \ \ \ \'EMBANKMENT Q REQUIRED —IFILL ] 6 C7 3 0 >I D. The design and Information shown on thls drawing Is provided PROJECT No.: SEC.No.: DATE: as a service to the project owner,engineer and contractor by DoContech Enoinsered Solutions LLC("Contech').Neither this �� _\ITCAIJ 4811 7367 5/3/2021 LU drowing,nor any pan thereof,may be used,mImoducedor ' NTE \\� �� DY07387 NORTH 3RD AVENUE DUPLEXES g modified In any manner without the poor written consent of ll ��.,F�` `�r� DESIGNED: DRAWN: Contech.Failure to comply is done at the user's own risk and INFILTRATION CHAMBER Contech expressly tlisclaims any liability or responsibility for DYO DYO F ENGINEERED SOLUTIONS LLC CMP DETENTION SYSTEMS su n use. r If discre ties between the supplant information which www.ContechES.com Bozeman, MT CHECKED:DYO APPROVED:DVO Pan PP Pon CONTECH hedrawin is based and actual fieldcendicneamencountered DYODS g 9025 Centre Pointe Dr.,Suite 400, West Chester,OH 45069 DETENTION SYSTEM SHEET NO.: �4 d as site work progresses,these discrepancies must be reported X to Contech immediately for reevaluation of the design.Contech W accepts no liability for tlesigns based on missing,incomplete or 800-338-1122 513-645-7000 513-645-7993 FAX DRAWING inaccurate information supplied!b ethers. 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