Name of Work:- Establishment of RAIN WATER HARVESTING IN AWASH VIKASH AT HIG POCKET PARK
Sl. No.
Item Description
1
Excavation in Foundation
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Earthwork in excavation by mechanical or manual means in all types of soil (including soft rock). Includes trimming of sides, leveling of bottom, and disposal of surplus soil within 50m lead
3
Drilling a vertical bore (150mm to 200mm diameter) using a DTH or Reverse Rotary rig to a depth of 20-30 meters (or until a sandy/permeable layer is reached)
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Supply and installation of ISI-marked PVC or Stainless Steel V-Wire Screen casing pipes. This includes a mix of \\"blind\\" pipes and \\"slotted/perforated\\" pipes to allow water to seep into the ground.
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Supplying and fixing 150mm dia perforated PVC pipefor the borewell, including bottom cap and top screen.
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Construction of a Rectangular Desilting Chamber(1*1*1 m^3) brick work with common burnt clay includes 1:4 cement mortar, internal plastering with waterproofing compound and a PCC base (1:3:6).
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Excavation Volume
8
PCC Base (1Cement:3Sand:6Aggregate)
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Fly ash brick masonry
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Internal Plastering with Waterproofing
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Supply and filling of the filter chamber with layers of:
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Base: Boulders/Cobbles (40-100mm)
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Middle: Gravel (10-20mm)
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Top: Coarse River Sand (well-washed).
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Providing heavy-duty Pre-cast RCC covers or Cast Iron (CI) gratings to withstand pedestrian or light vehicular traffic. Must include lifting hooks for maintenance access
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Site Cleaning & Debris Removal
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