Rehabilitation of 1200mm and 1400mm dia trunk sewer line by open technology method from PNB Apartment to Red light crossing of Sector-3/4, Dwarka in Matiala Constituency under EE(P )-SR-II. NIT-16

Temporary / permanent plugging and blocking of sewer line, branch connections for diversion of flows and removals of all plugs etc. on completion of work.1200 mm Dia Sewer

Temporary / permanent plugging and blocking of sewer line, branch connections for diversion of flows and removals of all plugs etc. on completion of work 1400 mm Dia Sewer

Providing everything else required for diversion of flow by pumping and / or by passing and to maintain the sewerage system functioning normal and managing the flow without any surcharging overflows etc. during the rehabilitation works of the sewer line to the satisfaction of the Engineer-in-charge. 1200 mm Dia Sewer line

Providing everything else required for diversion of flow by pumping and / or by passing and to maintain the sewerage system functioning normal and managing the flow without any surcharging overflows etc. during the rehabilitation works of the sewer line to the satisfaction of the Engineer-in-charge. 1400 mm Dia Sewer line

Loosen desilt and thoroughly clean and remove debris and objects such as boulders, bricks etc, bacteriological slimes, roots, encrustations, grease, carbonated deposits, etc from the sewer line by super sucker machine including disposal of silt / debris / malba / objects etc, to the dumping sites as per the direction of the engineer-in-charge, within the Delhi NCT area. 1200 mm Dia Sewer for slab-IV: for 50% to 60% silt

Loosen desilt and thoroughly clean and remove debris and objects such as boulders, bricks etc, bacteriological slimes, roots, encrustations, grease, carbonated deposits, etc from the sewer line by super sucker machine including disposal of silt / debris / malba / objects etc, to the dumping sites as per the direction of the engineer-in-charge, within the Delhi NCT area. 1400 mm Dia Sewer for slab-IV: for 50% to 60% silt

Pre-rehabilitation colour CCTV/ Photographic survey including pan and zoom inspection of laterals and defects and submission of video tapes or CD inclusive of colour photographs at every 10m interval printed off video printer to the Engineer in total 2 sets. Also allow for laser profiling of the sewer at every 10m interval and submit drawings with 4 diameter measurements (vertical, horizontal and cross measurements)

Design, manufacture, supply, deliver on site and install any one of these structural lining system (UV cured CIPP or Hot water cured CIPP or GRP or MWSL, or Geo polymer) including preparatory site work such as making good the sewer etc, grouting (wherever applicable)/ sealing of cracks and joints suitable as per site and local repairs to provide structural action consistent with the assumptions made in the structural design and construction of working shaft(wherever applicable) and reinstatement and making good of rehabilitated sewer and lateral connections etc and end sealing of the migration gap between the liner wall to wall (inner face between two successive manholes. This item is payable subject to completion of manholes/Chambers rehabilitation within the

Design, manufacture, supply, deliver on site and install any one of these structural lining system (UV cured CIPP or Hot water cured CIPP or GRP or MWSL or Geo polymer) including preparatory site work such as making good the sewer etc, grouting (wherever applicable)/ sealing of cracks and joints suitable as per site and local repairs to provide structural action consistent with the assumptions made in the structural design and construction of working shaft(wherever applicable) and reinstatement and making good of rehabilitated sewer and lateral connections etc and end sealing of the migration gap between the liner wall to wall (inner face between two successive manholes. This item is payable subject to completion of manholes/Chambers rehabilitation within the

Rehabilitation of manholes/chamber, including removal of old plaster, sealing of leaks, preparing surface after thorough cleaning, washing including.I)Application of 12 mm thick plaster with High strength, abrasion- resistance epoxy reinstatement mortar over a coat of Epoxy Resin concrete/ mortar bond coat of approved brand and manufacture . The plaster shall be applied on a well prepared surface after thorough cleaning and washing upto 1 meter high from top of benching and channel.II) 12 mm cement plaster of mix 1:4 (1 cement : 2 Coarse sand) on remaining portion of manhole including cost of necessary scaffolding, curing and finishing etc ,providing& applying Epoxy Resin coating for Steel/ Concrete chemical and acid resistant resin based protective coating with hardener in two or more coats of approved brand and manufacture to give a minimum thickness of 400 microns including preparation of surface etc over the plastered surface.III) Installation of new SFRC EXTRA HEAVY duty (EHD35) FRAME & COVER marked with DJB, SEWER, EHD35 year of manufacture trade name to required level as specified including installation of PVC encapsulated footrests as per requirement, and directed by the Engineer in charge. Manhole of dia 1830mm upto I.L =5 m

Add or Deduct per meter depth for rehabilitation of manholes/chambers including removal of old plaster, sealing of leaks, preparing surface after thorough cleaning, washing, application of 12 mm thick plaster 1:4 ( 1 SR cement: 4 Coarse sand),including cost of necessary scaffolding, curing and finishing etc., providing& applying Epoxy Resin coating for Steel/ Concrete chemical and acid resistant resin based protective coating with hardener in two or more coats of approved brand and manufacture to give a minimum thickness of 400 microns including preparation of surface etc, installation of P.V.C encapsulated footsteps as per requirement and directed by the Engineer in charge. Manhole of dia 1830mm

Post Linning/ Rehabilitation CCTV video survey/Photographic survey of the rehabilitated sewer (prior to commissioning) and submit video/photographic records in CD and still photographs taken at 10m interval in 2 sets.

Rectify settled sewers with new S & S RCC NP3 class pipes Conforming to IS:458 by narrow trench excavation method or trenchless method as required so as to make the sewer functional without any reverse gradient as per approval of the Engineer induding supply, transport, delivery & construction. After rehabilitation of the sewer, the contractor shall restore the ground/footpath surface to its original condition as per CPWD specifications and as directed by The Engineer-in- charge. (The cost of construction of new Man holes shall be paid under relevant item of BOQ.) (i) 1200mm dia sewer depth upto 7.50m

Rectify settled/sunken sewers by methods dewatering such as micro-tunneling & including cost of Pipe jacking method by installing stainless steel collared, 3mm thick HDPE lined RCC NP4 jacking pipes as manufactured conforming to IS:438-2003 in all soil/conditions at sitable 17 depths including entry & exit shafts and construction of new manholes as required so as to make the sewer functional without any reverse gradient as per approval of the Engineer including supply, transport, delivery & construction & jet grouting to stablise ground and or fill voids etc, as required to prevent ground movement and disturbance to nearby structure & amenities including filling of pits & disposal of Surplus earth & malba etc and making the connections with the existing sewers complete. After rectification of the sewer, the contractor shall restore the ground/footpath surface to its by The Engineer-in-charge (g) 1200mm dia sewer line