SPECIAL REPAIRS FOR REPLACEMENT OF CI/DI MS PIPE LINE AND CONNECTED ITEMS AT NEW NSB AREA UNDER GE (U-II) VISAKHAPATNAM

M & L for Earthwork excavation in trenches not exceeding 1.5 m in width and not exceeding 1.5 m in depth, in all types of soil, for laying pipelines, including dressing of sides, ramming of bottoms, and getting out the excavated material. The work shall include necessary shoring, strutting, dewatering as required, complete all as specified and directed by the Engineer-in-Charge.

Returning, filling, and compacting excavated earth in trenches, including spreading, leveling, watering, and well ramming in layers not exceeding 25 cm thickness, complete all as specified and directed by the Engineer-in-Charge.

Removing excavated material to a distance not exceeding 50 m, including loading, unloading, and depositing the same at a location as directed, at a level not exceeding 1.5 m above the starting point, complete all as specified and directed by the Engineer-in-Charge.

Material and Labour for Plain Cement Concrete (PCC) of mix 1:2:4 (Type B1) using 20 mm nominal size graded crushed stone aggregate, for thrust blocks, anchor blocks, and pipe supports, and other mics work including necessary excavation, centering and shuttering/ formwork, mixing, placing in position, compacting by mechanical vibrator, finishing to required line, level and shape, and curing, complete all as specified and directed by the Engineer-in-Charge.

M & L for cutting of existing road surface (bituminous/BT, WBM, or cement concrete road) to required width and depth for laying of pipelines, including marking, cutting with appropriate tools/machines, breaking, removing and disposal of excavated materials/debris within specified lead, complete all as specified and directed by the Engineer-in-Charge. Note:- The work shall include taking necessary precautions to avoid damage to adjoining structures/services and maintaining safety during execution.

Supply, laying, jointing, testing and commissioning of 250 mm diameter, Class K-9 Ductile Iron (DI) pipe conforming to IS: 8329:2000, centrifugally cast (spun) pressure pipe with socket and spigot ends, suitable for push-on joints, including rubber gaskets/jointing materials, complete all as specified and directed by the Engineer-in-Charge. Note:- The pipes shall be provided with external zinc coating with a finishing layer of bitumen, and internal cement mortar lining with bituminous seal coat, complete in all respects, including handling, loading, unloading, laying, alignment, jointing, testing, and commissioning.