Construction of RCC culvert with Boulder protection at Boro Dong Near chayabasti L.P. School under SOPD (PWD) for the year 2022-23 in Udalguri District_TN_18_2

Amount

3.4.i. Construction of embankement with approved material obtained from borrow pits with a lift upto 1.5m, transporting to site, spreading, grading to required slope and compacting to meet requirement of Tables 300.1 and 300.2 with a lead upto 1000m as per Technical Specification Clause 301.5 (i) Private land.

4.1 Construction of granular Sub-base by providing well graded material, spreading in uniform layers with motor grader on prepared surface, mixing by mix in place method with rotavator at OMC, and compacting with smooth wheel roller to achive the desired density, complete as per Technical Specification Clause 401. (ii) For grading - II Materials.

14.6 Providing and laying filter material underneath pitching in slopes complete as per drawing and technical specifications Clause 1302.

Providing and laying of Boulder apron laid in wire crates with 4mm dia GI wire conforming to IS: 280 and IS: 4826 in 100mm X 100mm mesh (woven diagonally) including 10 percent extrafor laps and joints laid with stone boulders weighing not less than 25 Kg each as per drawing and technical specification Clause 1301.

Providing and laying pitching on slopes laid over prepared filter media as per drawing and technical specifications Clause 1302.

Construction of subgrade and earthen shoulders with approved material obtained from borrow pits with all lifts and laids, transporting to site, spreading, grading to required slope and compacted to meet requirement of table 300.2 with lead upto 1000m as per Technical Specification Clause 303.1 (i) Private land.

SLAB CULVERT 11.1 Earthwork in excavation for structures as per technical specification Clause 305.1 including setting out, construction of shoring and bracing, removal of stumps and other deleterious material and disposal upto a lead of 50m, dressing of side I. Ordinary soil (i) Upto 3m depth A. Manual Means (Depth upto 3m)

11.4 PCC 1:3:6 in Foundation (Plain cement concrete 1:3:6 nominal mix in foundation with crushed stone aggregate 40mm nominal size mechanically mixed, placed in foundation and compacted by vibration including curing for 14 days) A. With crushed stone. I. P.C.C. grade M 10 (i) Nominal mix 1:3:6

11.4 Plain/Reinforced cement Concrete in open Foundation complete as per Drawing and Technical Specifications. B. PCC Grade M 15 III. PCC grade M 15, (i) Nominal mix 1:2.5:4

11.6 Stone masonry work in cement mortar in foundation complete as per technical specifications Clauses 702, 704, 1202 & 1203. I. Coursed rubble masonry (1st sort) in 1:4 cement mortar

11.4 Plain/Reinforced cement Concrete in open Foundation complete as per Drawing and Technical Specifications. IV. RCC Grade M 20

13.5 Providing and laying cement concrete wearing course M 30 grade including reinforcement complete as per technical specifications clauses 800 and 1206.3

12.11 Providing and laying filter media with granular crushed aggregates as per specification to a thickness of not less than 600mm with smaller size towards the soil and bigger size towards the wall and providing over the entire surface behind abutment, wing

12.9 Providing weepholes in brick masonry/stone masonry, plain/reinforced concrete abutment, wing wall, return wall with 100mm dia AC pipe extending through the full width of the structures with slope of 1 (V) : 20 (H) towards drawing face complete as per drawing

12.6 Supplying, fitting and placing HYSD bar reinforcement (Fe 415) in substructure complete as per drawings and technical specification Clauses 1002, 1005, 1010 & 1202.

13.6 Construction of RCC railing of M30 Grade in-situ with 20mm nominal size aggregate, rue to line and grade, tolerance of vertical RCC post not to exceed 1 in 500, centre to centre spacing between vertical post not to exceed 2000mm, leaving adequate space

13.10 Drainage Spouts complete as per drawing and Technical specification.

Prasanna Das

Arjun Saha