RIVER TRAINING AND PROTECTION WORKS



CHAPTER : 15.0
RIVER TRAINING AND PROTECTION WORKS
Item No. Descriptions Unit Rate
15.1 Providing and laying boulders apron on river bed for protection against scour with stone boulders weighing not less than 40 kg each complete as per drawing and Technical specification. A Boulder laid dry without wire crates. 2259.00 cum 2259.00
15.2 Boulder apron laid in wire crates (Providing and laying of boulder apron laid in wire crates made with 4mm dia GI wire conforming to IS: 280 & IS:4826 in 100mm x 100mm mesh (weaved diagonally) including 10% extra for laps and joints laid with stone boulders weighing not less than 40 kg each.) cum 2469.00
15.3 Cement concrete blocks (size 0.5 x 0.5 x 0.5 m) (Providing and laying of apron with cement concrete blocks of size 0.5x0.5x0.5 m cast in-situ and made with nominal mix of M-15 grade cement concrete with a minimum cement content of 250 kg/cum as per IRC: 21-2000.) cum 5182.00
15.4 Providing and laying Pitching on slopes laid over prepared filter media including boulder apron laid dry in front of toe of embankment complete as per drawing and Technical specifications    
  A  Stone/Boulder cum 2259.00
  B Cement Concrete blocks of size 0.3x0.3 x0.3 m cast in cement concrete of Grade M15 cum 5182.00
15.5

Providing and laying Filter material underneath pitching in slopes complete as per drawing and Technical specification

cum  1405.00
15.6

Geotextile Filter

(Laying of a geotextile filter between pitching and embankment slopes on which pitching is laid to prevent escape of the embankment material through the voids of the stone pitching/cement concrete blocks as well as to allow free movement of water without creating any uplift head on the pitching.)

sqm 242.00
15.7

Toe protection

(A toe wall for toe protection can either be in dry rubble masonry in case of dry rubble pitching or pitching with stones in wire crates or it can be in PCC M15 nominal mix if cement concrete block have been used for pitching . Rates for toe wall can be adopted from respective clauses depending upon approved design. The rate for excavation for foundation, dry rubble masonry and PCC M15 have been analysed and given in respective chapters.)

   
15.8 Providing and laying Flooring complete as per drawing and Technical specifications laid over cement concrete bedding.    
  A  Rubble stone laid in cement mortar 1:3 cum 5835.00
  B Cement Concrete blocks Grade M15 cum 6824.00
  C Cement Concrete Grade M15 cum 5080.00
15.9 Dry rubble Flooring cum 2628.00
15.10 Curtain wall complete as per drawing and Technical specification    
  A  Stone masonry in cement mortar (1:3) cum 5297.00
  B  Cement concrete Grade M15 cum 5080.00 cum 5080.00
15.11 Flexible Apron :Construction of flexible apron 1 m thick comprising of loose stone boulders weighing not less than 40 kg beyond curtain wall. cum 2321.00
15.12 Gabian Structure for Retaining Earth (Providing and construction of a gabain structure for retaining earth with segments of wire crates of size 7 m x 3 m x 0.6 m each divided into 1.5 m 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 x 100 mm, filled with boulders with least dimension of 200 mm, all loose ends to be tied with 4 mm galvanised steel wire) cum 2470.00
15.13 Gabian Structure for Erosion Control, River Training Works and Protection works (Providing and constructing gabain structures for erosion control,river training works and protection works with wire crates of size 2 mx 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.) cum 3057.00

*****