Construction of protection work at Subbung Bridge in Siang District.

Amount

SH:- RCC Retaining Wall

Excavation for Structures (Earth work in excavation of foundation of structures as per drawing and technical specification, including setting out, construction of shoring and bracing, removal of stumps and other deleterious matter, dressing of sides and bottom and backfilling with approved material.) Ordinary rock (not requiring blasting) Manual Means Depth upto 3 m ( with de-watering)

PCC 1:3:6 in Foundation (Plain cement concrete 1:3:6 nominal mix in foundation with crushed stone aggregate 40 mm nominal size mechanically mixed, placed in foundation and compacted by vibration including curing for 14 days.)

Supplying, fitting and placing HYSD bar reinforcement in substructure complete as per drawing and technical specifications.

Supplying, fitting and placing HYSD bar reinforcement in superstructure complete as per drawing and technical specifications.

Centring and shuttering including strutting, propping etc and removal of form work for : a) Foundation, footings, bases of columns etc. and mass concrete.

b) Walls (any thickness) including attached pilasters, buttresses, plinth and string courses etc.

Plain/Reinforced cement concrete in sub-structure complete as per drawing and technical specifications. RCC Grade M20 Using concrete Mixer a) Height upto 5m

b) Height 5m to 10m

Providing weep holes in Brick masonry/Plain/Reinforced concrete abutment, wing wall/return wall with 100 mm dia AC pipe, extending through the full width of the structure with slope of 1V :20H towards drawing foce. Complete as per drawing and Technical specifications.

Back filling behind abutment, wing wall and return wall complete as per drawing and Technical specification Sandy material

SH: Gabian Structure

Excavation for Structures (Earth work in excavation of foundation of structures as per drawing and technical specification, including setting out, construction of shoring and bracing, removal of stumps and other deleterious matter, dressing of sides and bottom and backfilling with approved material.) Ordinary rock (not requiring blasting) Manual Means Depth upto 3 m ( with de-watering)

Gabian Structure for Erosion Control, River Training Works and Protection works Providing and constructing gabian structures for erosion control, river training works and protection works with wire crates of size 2 m x 1 m x 0.3 m each divided into 1m compartments by cross netting, made from 4 mm galvanised steel wire @ 32 kg per 10 sqm having minimum tensile strength of 300 Mpa conforming to IS:280 and galvanizing coating conforming to IS:4826, woven into mesh with double twist, mesh size not exceeding 100 mm x 100 mm, filled with boulders with least dimension of 200 mm, all loose ends to be securely tied with 4 mm galvanised steel wire.

Back filling behind abutment, wing wall and return wall complete as per drawing and Technical specification. Sandy material

Shri Tatung Jamoh