Major Works Water Supply Scheme South Tripura District Replacement of 1 DTW SH Construction of Pump House pipeline laying for reconnection from new spot to existing pipeline and allied works at ONGC Gajalia Nabagram GP Satchand RD Block 2026 27

Earth work in excavation by mechanical means (Hydraulic excavator)/ manual means in foundation trenches or drains (not exceeding 1.5 m in width or 10 sqm on plan) including dressing of sides and ramming of bottoms, lift upto 1.5 m, including getting out the excavated soil and disposal of surplus excavated soil as directed, within a lead of 50 m. a) All Kinds of Soil

Filling available excavated earth (excluding rock) in trenches, plinth, sides of foundations etc. in layers not exceeding 20cm in depth, consolidating each deposited layer by ramming and watering, lead up to 50 m and lift upto 1.5 m. A)All kinds of soil

Supplying and filling in plinth, under floor, foundations etc. with sand (fine) from local quarry with all lifts including spreading in horizontal layers, watering, grading to required slope, ramming, consolidating and compacting each layer by using plate compactor or by any suitable method complete.

i) 1:2:4 ( 1 Cement: 2 fine sand : 4 well burnt brick aggregate 40 mm nominal size)

ii) 1 : 3 : 6 ( 1 cement : 3 fine sand : 6 graded well burnt brick aggregate of 40 mm nominal size)

iii) 1 : 4 : 8 ( 1 cement : 4 fine sand : 8 graded well burnt brick aggregate of 40 mm nominal size)

i) Foundations, footings, bases for columns

ii) Columns, piers, abutments, pillaras, posts and struts