Protection of Power House Building against Shooting boulders CHEP-II

Shotcreting R.C.C. columns, beams and slabs etc. in layers wit approved design mix concrete having the specified minimum characteristic compressive strength [with ordinary portland cement, coarse sand and graded stone aggregate of 10 mm maximum size in proportion as per design criteria] including the cost of centering and shuttering at edges and corners etc. as directed by Engineer-in- Charge Note: Rates shall include the providing necessary ground wires etc. The levelling gauges, if used, shall be paid for separately. Payment under this item shall be made only after proper wet curing has been done and surface has been satisfactorily evaluated by sounding/ tapping with a blunt metal instrument. 50mm thick in Grade M 25 with cement content not less than 330 kg per cum

Providing and fixing hard drawn steel wire fabric of size 75 x25 mm mesh or other suitable size wire mesh to be fixed & firmly anchored to the concrete surface by means of “L” shaped mild steel shear key welded with existing reinforcement including the cost of materials, labour, tool & plants as approved by Engineer-in-charge.

Supply and fixing of 50mm dia HDPE perforated pipe (SN-8) as weep holes 500mm long, with non-woven geotextile filter sock at inner end, all materials & labour

Providing and installation of soil nailing system using 100 mm dia rotary/percussion drilled boreholes (7 m deep, inclined at 15°), including supply and fixing of 25 mm dia Fe-500 HYSD bars with PVC centralizers, pressure grouting with cement-sand slurry (1:1.5, w/c 0.45) by grout pump, fixing of MS bearing plates with nuts and washers, and application of anti-corrosion epoxy coating on exposed portions, complete in all respects

Providing and fixing double scaffolding system (cup lock type) on the exterior side, up to seven storey height made with 40 mm dia M.S. tube 1.5 m centre to centre horizontal and vertical tubes joining with cup and lock system with M.S. tubes, M.S. tube challies, M.S. clamps and M.S. staircase system in the scaffoldings for working platform etc. andmaintaining it in a serviceable condition for the required duration as approved and removing it thereafter. The scaffolding system shall be stiffened with bracings, runners, connection with the building etc. wherever required for inspection of work at required locations with essential safety features for the workmen etc complete as per directions and approval of Engineer-in-charge. The elevational area of the scaffolding shall be measured for payment purpose. The payment will be made once irrespective of duration of scaffolding.

Carriage of material By Mechanical Transport including loading, unloading and stacking

Cement avg 05 km

Sand average 03 km