Reconstruction of Existing Damaged Manhole Sewer Pipe Line at SenthilNathan Nagar Near Sarojini nagar In Kumbakonam City Municipal Corporation MH depth of 450M

Amount

Earth work excavation and depositing on bank with an initial lead of 10m and initial lift of 2m in Hard stiff clay, stiff black cotton, hard red earth, shales, murrams, gravel, stoney earth, and earth mixed with small size boulders and hard gravelly soil -SS20B

First depth of 2 m

Second depth of 2 m

Third depth of 1 m

Supply and filling the foundatiion and basement with clear M sand in layers complying with standard specification including consolidation and watering etc. complete and as directed by , Officers.

P.C.C 1:4:8 (one cement, four sand and eight coarse aggregate) using S.R. cement and 40 mm H.B.G stone including mixing concrete, laying, curing and compacting of concrete etc., complete and as directed by the , Officers.

Reinforced cement concrete M30 using S.R. cement and 20mm size hard blue granite stone (machine crushed) excluding cost of reinforcement, fabrication and placing the grills in position and excluding cost of shoring and strutting but including curing, finishing and mixing concrete using mechanical mixer machine and compaction by machanical vibrator etc., complete and as directed by , Officers.

Upto 1.5 m

From 1.5 m to 4.5 m

Supplying fabricating and placing in position of RTS grills at all heights for reinforcement including cost of steel for all works and labour charges including cost of binding wire etc., complete for all RCC works and as directed by Officers. upto 16mm dia.

Supply and erection of steel centering, shuttering for soffits and sides including necessary supports and strutting for all RCC works using MS sheets of suitable size of BG 10 stiffened with MS angle of size 25 X 25 X 3mm for boarding laid over Silver Oak joists of size 10cm X 6.5cm spaced at 90cm c/c and supported by Casuarina Props 10cm - 13cm spaced at 75cm c/c etc., complete and as directed by , Officers.(Retrieved Materials should be taken back by the contractor.)

Plane surface From 0m to 3.3 m

Curved surface From 0 m to 3.3 m

Shoring, and strutting with sheet piles of size width 400 mm x height of 3m x thickness of 9mm as per IS 2314-1986 by driving on both sides of the trench from Ground Level up to the required depth and connecting the above sheet piles by horizontal strutting with sheet piles at an interval of 1.0m, fixing the sheet piles by connecting the horizontal strutting with casurina poles of 8cm to 10cm dia. at 1.50m interval and including removing the sheet piles after the pipelines are laid, jointed, tested, and stacking it safely for other uses. It includes the cost of sheet piles and casurina poles including labour charges for erecting the sheet piles, driving the sheet piles, removing the sheet piles, fixing Casurina poles, etc., complete and all other incidental charges for the depths, - 0-4mts.

Barricading work (Where the lines are in narrow width of municipality area, busy streets like Market, Bus-stand and in the Highways etc.) for laying of pipe line using casurina poles at 1.50m center to center (8cm to 10cm dia. and 1.80m height) vertical with horizontal poles in two rows, painting the vertical poles in the road facing sides with ready mix paint, tying the vertical and horizontal poles with coir rope including supplying, delivery and fixing of GI sheet (0.90m x 0.8mm thick) in the horizontal poles and fixing 75mm dia. reflectors including earth work excavation for fixing vertical posts and finally removing and stacking the materials safely for further use etc., complete and as directed by Dept officers.

Supplying and fixing of F.R.C Manhole frame with cover (60cm dia extra heavy duty) including cost and conveyance of all charges etc., complete as per standard specification

Supply and fixing of PVC encapsulated CI steps ( 1 No at 30 cm interval ) in the manhole including cost and conveyance of all charges etc., complete as per standard specification

Supply and Delivery of 400MM R.C.C. pipes. (excluding cost of sound pipe and jointing materials and earth work) and as directed by the TWAD Board Officers

Lowering RCC rigid pipes and specials to trench and laying to proper grade and alignment, jointing with PVC couplers with cement paste.

400 mm RCC Pipe

Benching :- P.C.C 1:2:4 (one cement, two sand and four coarse aggregate) using S.R. cement and 20 mm H.B.G stone including mixing concrete, laying, curing and compacting of concrete etc., complete and as directed by the , Officers.

Refilling the outside of the well with excavated earth (other then sand) complying with standard specification for filling the foundation including watering consolidation etc., complete as directed by the , Officers.

Disposal of surplus excavated earth in pipe laying and road restoration works etc.,transporting to the sites specified by Engineer within 5 Km lead, including loading, spreading etc., complete and as directed by the Engineer.

Dewatering using 3HP to 70HP diesel engine pumpset including Hire charges, cost of Diesel, Engine oil, pump operator, labour charges, conveyance of pumpset and fuel to site and back, loading, unloading and any other incidental charges etc., complete.(up to 7.5 HP)

Supply and delivery of submersible centrifugal sewage non-clog pumps, vertical spindle type pump , wear resistance with submersible motor for the various duty conditions. Pump shall be capable of handling min 100 mm solid size with sewage specific gravity of up to 1.05. Pump shall be of robust construction, Liquid passages shall be finished smooth and designed as to allow free passage to solids. Pump Impeller should be of Non-clog semi open type , single vane / multi vane preferably contra bloc or vortex impeller design. Double mechanical seal with silicon carbide faces should be provided to protect the motor from ingress of sewage along the shaft. The critical speed of the rotor shall be at least 30% above the operating speed. Pumps should have double bearings between the pump & motor. The bearings life shall be minimum 100,000 hrs of operation with greased for life. Pump should be provided with automatic coupling device including pedestal, duck foot bend, stainless steel guide pipe or related accessories of suitable size to facilitate lifting and lowering into guide rails for easy maintenance. Pump shall be provided with a stainless steel lifting chain conforming to BS 970 Gr 304. Pump speed shall be of 9600 rpm for high duty pumps and 960/1450 rpm for low duty pumpsets. Casing and impeller should be of CI Gr. FG 260 :IS210 more preferably with hardened impeller.Shaft should be of stainless steel AISI 410. All the fasteners and bolts shall be of AISI 410.The submersible motor shall be operated with 3ph, 415 V(+or– 10%), 50Hz(+or-5 %) dry induction type. Motor shall be capable of giving rated output without reduction in the expected life span when operated continuously. The rotating assembly shall be dynamically balanced as per standards. The starting current of the motor shall not exceed 200% of rated full load current for Star / Delta or ATS starting under any ircumstances .The motor shall be suitable for full voltage star delta / ATS starting. The locked rotor current of the motor shall not exceed 600% of full load current unless otherwise specified. Motor shall be designed to withstand 120% of rated speed for two minutes without any mechanical damage, in either direction of rotation. The motor vibration shall be within the limit specified in applicable standards . Motor should be of IE2, explosion proof compatible for VFD operation together with star-Delta /ATS starter, protection against increase in stator winding temperature (15 deg Celsius), bearing temperature, leakage in the stator housing and terminal box shall be provided and to be suitably interlocked with the control panel for tripping the pump in case of increase in temperature beyond set limit. Insulation class shall be of “Class H” and degree of protection shall be of IP 68 as per IS 4691. Motor shall be suitable for continuous operation in fully submerged or partially submerged condition.The pumpset shall be supplied with power cable of PVC insulated and PVC sheathed, copper, flexible, round type with required conductor size and number of cores as per starting method and of specified length for continuous use under water and air. The control cable of PVC insulated, PVC sheahed, flexible for stator winding temperature sensor 3core x 1.5 sq.mm copper conductor and for bimetallic switches 2core x 1.5 sqmm copper conductor shall be provided. Motor shall be supplied with 10m of round submersible copper cable of suitable size. Discharge 200 to 300 M3/hour

G I PIPES (MEDIUM) AS PER IS 1239/PART I/2004 150 MM

Selva Construction