NIT NO-52-2025-26-Annual repairing of leakage on various size of pipe line under RWSS Boraj, Rampurabadiya, Gudhabersal under Sub Division Dudu

Maintenance of pipelines irrespective of size & materia which includes Repairing of bursts & leakages pollution control, survey & removal of chocking, disconnection of illegal connections, collection & recording minimum 10 Nos. Residual chlorine samples during daily supply timings, interconnections and all works related to pipe line network in existing distribution / rising main pipe lines of all sizes by digging out suitable size of pit in soft and loose soil / hard soil including cutting of black top, WBM & CC top of road of any size at work site. This will also include cutting of pipe ends, fixing of pipe piece with jointing material to make repair leak proof and refilling of pit by execavated sand by ramming it at sides of pipe and upto ground level. For entire job contractor will use their own T&P, Contractor will his own resources shall arrange de_watering, jcb & tractor compressor if any and restore any amenity at his own cost damaged while performing the work in this item. the work includes daily pentrolling and repair the leakages within stipulated time and complete maintenaance of pipe line network of rising and distribution pipe line network within scope of work for per km pipe line per month. Jointing material shall be provided by department.

Minimum labour for a following kms pipelines to be deployed

01 km to 50 km one fitter-II & one beldar

51 km to 100 km one fitter-II & two beldar

101 km to 200 km two fitter-II & four beldar

201 km to 300 km three fitter-II & six beldar

301 km to 400 km four fitter-II & eight beldar

401 km to 500 km five fitter-II & ten beldar

Removing & Re-fixing of Precast concrete interlocking blocks for laying of pipe line by manual method, stacking of serviceable & non serviceable material separately, disposal of dismantled material lead up to 50 mtr. The C.C. interlocking paving blocks be laid on average 25 mm thick bed of coarse sand and the joints to be filled with fine sand. Laying procedure on compacted sub base as defined. Complete job is to be executed as per the directions of Engineer in charge. The rates to be inclusive of fixing of 70 percent reusable precast concrete interlocking block and cost of required new precast concrete interlocking block against damaged, including all lead and lift as per Technical specifications. (Interlocking block manufactured by fully computerized automatic stationery hydraulic vibro pressed machine & full computerized automatic batching plant of class A-1 as per BS:6717-2001. Tensile splitting strength and breaking load as per BS: 6717-2001 Colour: Grey cement natural colour. Variation in Dimension : Less than 1.6 mm Variation in thickness: Less than 3.2 mm)

Note: If existing precast block used more than 70%, than for every 1% use above 70%, deduction of 1% in cost shall be done for every 1% use above 70%.

60 mm thick.

Providing and laying in position cement concrete M10 grade nominal mix 1:3:6 (1 Cement : 3coarse sand : 6 graded stone aggregate 40 mm nominal size) in base course complete including all material, labour, machinery, lighting, guarding for road restoration work in trenches of pipe line and chamber work. Measurement for CC work to be made as per standard trench width specified in tender document and no extra payment shall be made be made for trench width more than specified, complete work as per technical specification and scope of work.