N.I.T. NO.27 (2021-22), Item No. 2

Plugging of the existing sewer line manhole with 2 nos MS Sheet 6 mm thick angle iron frame and braces shutters to be shutted with wooden struts and filling the manhole with empty cement (PVC) bags filled up with earth up to suitable depth to avoid leakage the sewerage on the u/s side to be pumped with suitable nos & capacity of pumps, till the work is completed so as to keep reduce the pressure to the required extent to the plugged Manhole. Necessary arrangement to be made for pumping for any leakage noticed in the manhole or to replug in the case of heavy leakages. the Steel shutters and the eart filled PVC cement bags shall be removed after the completion of work and then the manhole shall be desilted 1000 mm dia sewer

1100 mm dia sewer

1200mm Dia Sewer

1400mm Dia Sewer

1700mm Dia Sewer 78548.75/1800*1700

2) Loosen desilt and thoroughly clean and remove debris and objects such as boulders, bricks etc, bacteriological slimes, roots, encrustations, grease, carbonated deposits, etc from the sewer line including disposal of silt / debris / malba / objects etc, to the dumping sites as per the direction of the engineer-in-charge, within the Delhi NCT area. 1000 mm dia sewer

1100 mm dia sewer

1200mm Dia Sewer

1400mm Dia Sewer

1700mm Dia Sewer(11124.10+8789.40)/2= 9956.75

3) Online Pipe inspection & Acoustic profilling of trunk sewer pipelines (900mm to 2000mm Dia)in Delhi ijn running condition without stoppage of flow using robotic marine trekker platform for the purpose of silt-level estimation including mobilization of equipment,preparation of electronic report and submission in 3 sets of DVDs.

4) Raising manhole cover and frame slab to required level including dismantling existing slab and making good the damage as required (Raising depth of manhole to be paid separately) : Circular manhole 140 cm dia with circular cover 600 mm dia of grade EHD - 35

Brick work with modular extruded brunt fly ash clay sewer bricks (Conforming to IS: 4885 ) in cement mortar 1:4 (1 cement : 4 coarse sand) in foundation and plinth :Cement Mortar 1:4 ( 1 cement : 4 coarse sand)

Supplying and stacking at site SFRC manhole frame and cover with steel fibre of ISI marked conforming to IS 12592 part I of HD -20/ EHD -35 with matching frame of class HD 20 IS: 12692 /EHD-35 IS: 12592 part II with 875 mm external dia and clear 560 mm internal dia EHD-35

7) Providing orange colour safety foot rest of minimum 6 mm thick plastic encapsulated as per IS : 10910, on 12 mm dia steel bar conforming to IS: 1786, having minimum cross section as 23 mmx25 mm and over all minimum length 263 mm and width as 165 mm with minimum 112 mm space between protruded legs having 2 mm tread on top surface by ribbing or chequering besides necessary and adequate anchoring projections on tail length on 138 mm as per standard drawing and suitable to with stand the bend test and chemical resistance test as per specifications and having manufacture’s permanent identification mark to be visible even after fixing, including fixing in manholes with 30x20x15 cm cement concrete block 1:3:6 (1 cement : 3 coarse sand : 6 graded stone aggregate 20 mm nominal size) complete as per design.

Providing & erecting 2.0 m high temporary barricading at site as per drawing / direction of Engineer -in - charge which includes writing and painting ,arrangement for traffic diversion such as traffic signals during construction at site for day and night ,glow lamps, reflective signs, making ,flags, caution tape as directed by the engineer -in- charge. The barricading provided shall be retained in position at site continuously i/c shifting of barricading from one location to another location as many times as required during the execution of the entire work till its completion. Rate includes its maintenance for damages, painting, all incidentals, labour materials, equipments and works required to execute the job. The barricading shall not be removed without approval of Engineer - in - charge (Note-One time payment shall be made for providing barricading from start of work till completion of work i/c shifting. The barricading provided shall remain to be the property of the contractor on completion of the work)

12 mm cement plaster :1:4 (1 cement : 4 coarse sand)

Neat cement punning

V.N.ENGINEERING COMPANY