Specifications Part 1 - Water Supply, Sewerage and Tube Well Works

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12.17.10 Construction of backfill envelope and final backfilling of the trenchesDWC PE Piping System with well compacted Backfill Envelope along with thebottom and sides of trench (native soil) work together to support soiloverburden and superimposed (traffic) loads. The carefully constructed BackfillEnvelop has three distinct but non-isolated stages (Ref. enclosed C/S DrawingIII, Annexure I).The construction need to be done stage by stage as per thesequence stated below:Bedding portionUp to Haunch levelRemaining portionThe material for backfill envelop shall be in accordance with the structuraldesign of flexible buried conduit as per relevant international codes mentionedin the list of Standards as normative references of EN 13476 /1 & 3. It can bethe same material that were removed in the course of excavation or it can befine sand/course sand/gravel / moram /other form of course / fine aggregatesdepending on the effected Design Load [Overburden + Superimposed (Live)load]. However, in no circumstances, the flexible pipe should not be embeddedin cement concrete (un- reinforced or reinforced) which invariably inducesundesired rigidity in the system.The remaining portion of backfilling which do not contribute to the structuralintegrity of the system may be the materials that were removed in thecourse of excavation or any other foreign material as may be required tosuit the particular site condition. These materials shall consist of at leastclean earth and shall be free from large clod or stone above 75 mm, ashes,refuse and other injurious materials.After completion of lying of pipes, etc, first the Backfill Envelope shall beconstructed as per design around the pipe. Voids must be eliminated byknifing under and around pipe or by some other indigenous tools.The compaction, by hand rammers or compactors with necessary wateringto a possible maximum level of proctor density shall be ensured.Backfilling shall start only after ensuring the water tightness test of joints forthe concerned sewer segments. However, partial filling may be donekeeping the joints open.Precautions shall be taken against floatation (if at all necessary) as per thespecified methodology and the minimum required cover. For indicativeDrawing See Fig IV, Annexure II.12.17.11 Continuity Test /Hydraulic TestingContinuity of the pipe segments in between two manholes is required to beensured in the same modality as practiced for non-pressure RCC pipeline.Hydraulic testing of pipes shall be done, if specifically asked for by the client forany specific stretch. The procedure for hydraulic testing shall be similar to thatfor non-pressure RCC pipes.12.17.12 Measurements:The lengths of pipe shall be measured in the running meters nearest to a cm aslaid, lowered and jointed from in side of one manhole to the inside of the othermanhole. The length shall be taken along the centre line of the pipes.12.17.12.1 All fittings such as bends, junction, etc., which shall not be measuredseparately. Excavation, refilling, shoring and timbering in trenches and cementUrban Administration & Development Department Page 146
concreting where ever required shall be measured separately under relevantitem of work.12.17.12.2 Security money for testing should be kept at 10 % of the value of the work.After testing of the complete sewerage system to the satisfaction of theengineer in-charge the same shall be released.12.17.13 Rate12.17.13.1 The rate shall include the cost of material and labour involved in all theoperation described above including the cost of concrete which shall bepaid separately.Urban Administration & Development Department Page 147
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GOVERNMENT OF MADHYA PRADESHDEPARTM
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Branch(i) A special form of cast ir
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A valve in which the closure to an
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Sullage waste Water:Spent water fro
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Laying:The approximate positions of
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CHAPTER NO.1CAST IRON SOCKET AND SP
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Socket and spigot pipes Class AWeig
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1.5 .4 Pipe shall be tested hydrost
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1.9.3 Mass (weight) of the various
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Diameter (mm)Weight (approx) kgHeav
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1.9.3.11 Cast iron plugs:-Diameter
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1.12.7 Caulking may be done with pn
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2.5 Thrust Blocks2.5.1 In case of b
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2.9.3 Should any test of the pipe l
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CHAPTER NO.3CAST IRON PIPES AND SPE
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3.4.2.2 Cast iron flanged spigot:-R
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3.4.2.6 All flanged cast iron tees:
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Nominal diameterTable 2.3Refer Tabl
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Table No.3.8DimensionWall thickness
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CHAPTER NO. 4DUCTILE IRON PRESSURE
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Nominal Diameter Outer diameter of
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4.3.2.4 Where the coating material
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Nominal DiameterDN (mm)Table No. 4.
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4.7.2.3 Lengths of FittingsThe perm
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during the jointing operations. As
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CHAPTER NO.5:UNPLASTICIZED PVC PIPE
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NominaloutsideDiameter(Nominalsize)
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5.10 Handling and storage5.10.1 Bec
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a)b) Size of the fitting and the ap
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5.14.5 Trench Bottom5.14.5.1 The tr
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CHAPTER NO.6CAST IRON VALVES6.1 App
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efore painting. All exposed machine
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with the main. For large aqueduct p
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6.4.7 Nominal sizes :-6.4.7.1 The r
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Table No.6.6Material for different
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CHAPTER -7GALVANIZED IRON PIPES, SP
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7.4.2 Globe Valves- The globe valve
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7.6 Testing of valves:-7.6.1 Genera
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NominalBoreDimensions and Nominal M
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7.10 Testing of Pipes :Following te
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Nominal BoreMinimum Outside Minimum
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7.15.2.2 Taper Screw Plug TestSocke
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7.20.2 All pipes and fittings shall
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S.NoTolerance and ovality is given
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8.7.2 The pipe shall be as uniform
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directional changes within the tren
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Page 102 and 103: 8.26.6.3 PP Saddles8.26.6.3.1 The b
Page 104 and 105: g Bypass Pipe Carbon Steel IS1239(p
Page 106 and 107: 9.4.1 Coupling Area of jointThis is
Page 108 and 109: Table No. 9.3Hydrostatic Design Pre
Page 110 and 111: polyester belts with a minimum widt
Page 112 and 113: 9.19.4 Straight continues lengths o
Page 114 and 115: Table No. 10.2(Refer Table No.1 IS
Page 116 and 117: 1592-2003. The tolerances on the in
Page 118 and 119: 10.5.2.5 Weight of cast iron plain
Page 120 and 121: 10.5.2.9 Weight of cast iron Plain
Page 122 and 123: 10.8.1.1 Width- The width of the tr
Page 124 and 125: 10.11.2 Cast Iron Detachable Joints
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Page 128 and 129: 10.18.9.1 After the test has been c
Page 130 and 131: CHAPTER NO- 11SALT GLAZED STONEWRE
Page 132 and 133: 11.3.2 Each pipe and fittings may a
Page 134 and 135: on each horizontal rail which is fi
Page 136 and 137: 11.7.7 The joint with cast iron or
Page 138 and 139: CHAPTER NO- 12UNPLASTICIZED NON-PRE
Page 140 and 141: 12.4 Dimensions of Pipes:12.4.1 Mea
Page 142 and 143: 12.8 Trench:-(See Drawing No.3)12.8
Page 144 and 145: 12.13.3 Care should be taken to lea
Page 146 and 147: 12.17.6 HandlingFollowing Recommend
Page 150 and 151: CHAPTER - 13REINFORCED CEMENT CONCR
Page 152 and 153: Diameter ThicknessStrength Test Req
Page 154 and 155: Table 13.5(Refer Clause 8.2 IS 458
Page 156 and 157: efore the next pipe is laid. Adequa
Page 158 and 159: 13.11.4 The water shall be filled t
Page 160 and 161: Chapter - 14SEWER APPURTENANCES14.1
Page 162 and 163: provided with cover of medium duty
Page 164 and 165: 14.3.5.4.3 (c) By drop in previous
Page 166 and 167: 14.5.3.4 Where the diameter of the
Page 168 and 169: 14.7.4 Heavy reinforced concrete co
Page 170 and 171: 14.11 By pass:By pass arrangements
Page 172 and 173: acetate paper, silt drums, ropes, i
Page 174 and 175: 14.22. Automotive Suction Machine :
Page 176 and 177: 14.25.3 Brick Masonry Chamber : Aft
Page 178 and 179: 15.2.5 Lift: the vertical distance
Page 180 and 181: ensure that drilling has been done
Page 182 and 183: accepted deductions (stated as a pe
Page 184 and 185: described in IS 4031 (Part-5) : 198
Page 186 and 187: v) Cleat bolt of size M-10vi)vii)Se
Page 188 and 189: 15.17.5.3 To protect persons from i
Page 190 and 191: 15.17.5.19. Wherever a socket or co
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Page 194 and 195: 15.17.14.7 Clear out space shall be
Page 196 and 197: 15.17.15.7.1 Ordinarily no surplus
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Water Supply pipes lines should be
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16.3.3 Failure to remove the ridge
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16.9.12 The cover shall be capable
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17.7 Development of tube-well with
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17.13.4 Fine enough to prevent the
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(iv) No. of slots per m 429(v) % Ar
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Annexure: ADRILLING OF TUBE WELL1.
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particularly those having clay or s
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5.3.2 The shape of the openings sho
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5.7.3.6.1 The contractor shall deve
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STRATACHATANNEXURE-2Mohalla/BastiNa
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LocationApparentResistivelyAB/2Inte
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GRAVEL PACKED TUBE WELLSGAVEL PACKE
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HAND PUMP PLATEFORMUrban Administra
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Urban Administration & Development
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Specifications Part 1 - Water Supply, Sewerage and Tube Well Works

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