TECHNICAL SPECIFICATIONS For CIVIL AND …

1 1 GOVERNMENT OF INDIA DEPARTMENT OF ATOMIC ENERGY BHABHA ATOMIC RESEARCH CENTRE ARCHITECTURE & CIVIL engineering DIVISION TECHNICAL SPECIFICATIONS For CIVIL AND PUBLIC HEALTH WORKS (August 2007) TECHNICAL SPECIFICATIONS for CIVIL and Public Health Works 2 INDEX DESCRIPTION PAGE 1. General 2 2. Pile foundation 3 3. Earthwork 8 4. Anti Termite Treatment 21 5.

2 Reinforced Cement Concrete 25 6. Form work 56 7. PVC Water Stops 63 8. Reinforcement steel 64 9. Structural steel 67 10. Brick work 79 11. Stone Masonry 81 12. Rubble Stone Hard Core 83 13. Flooring 84 14. Wood work 111 15. Aluminium works 128 16. MS pressed steel doors, Rolling shutters, 137 Grills 17. Plastering work 142 18 Water proofing treatment 149 19. Painting 153 20. False Ceiling 184 21. Dismantling & Demolition 194 3 DESCRIPTION PAGE 22.

3 RCC pipes 196 23. Fencing 201 24. Road works 207 25. Precast RCC Jali 222 26. Expansion joints 224 27. Rough Shahabad stone pavement 226 & paver blocks 28. Public Health works. 229 1 SECTION - V S P E C I F I C A T I O N S 2 S P E C I F I C A T I O N S GENERAL : The detailed SPECIFICATIONS given hereafter are for the items of works described in the schedule of quantities attached herein, and shall be guidance for proper execution of work to the required standards.

4 It may also be noted that the specification are of generalized nature and these shall be read in conjunction with the description of item in schedule of quantities and drawings. The work also includes all minor details of construction which are obviously and fairly intended and which may not have been referred to in these documents but are essential for the entire completion in accordance with standard engineering practice. The Chief Engineer, A&CED, shall be the sole deciding authority as to the meaning, interpretations and implication for various provisions of the SPECIFICATIONS and his decision in writing shall be final and binding on all concerned. In case any difference or discrepancy between the SPECIFICATIONS and the description in the schedule of quantities, the schedule of quantities shall take precedence. In case any difference or discrepancy between the SPECIFICATIONS and the drawing, the specification shall take precedence.

5 Unless specifically otherwise mentioned, all the applicable latest codes and standards published by the Bureau of Indian Standards and all other standards, shall govern in all respects of design, workmanship, quality, properties of materials, method of testing and method of measurements. * * * * * 3 SPECIFICATIONS FOR PILE FOUNDATION TECHNICAL SPECIFICATIONS FOR BORED CAST-IN-SITU PILES SCOPE : This specification covers construction of load bearing concrete bored cast-in- situ piles of appropriate diameter which can transmit the load of the structure to the soil by both resistance developed at the tip by end bearing and along the surface of the pile shaft by friction. Tenderer shall be responsible for the construction of the entire pile foundation system as proposed by the Department in its tender drawing and schedule and shall guarantee the stability of the pile foundation system offered against the risks of settlement and other type of damage to the structure.

6 The Tenderer shall submit his offer as per Department's schedule of work, SPECIFICATIONS and drawings. EQUIPMENT & ACCESSORIES: The equipment and accessories shall depend on the type of bored cast-in-situ piles chosen for the job and shall be selected giving due consideration to the sub-soil strata, ground water conditions, type of founding materials and the required penetration, manner of operation etc. For Bored cast-in-situ piles percussion boring by suitable drilling rigs using direct mud circulation (DMC) methods is to be adopted and the size of the cutting tool shall not be less than the diameter of the pile by more than 75 mm. Bentonite shall be used as drilling mud and its basic properties shall conform to Appendix - 'A' of 2911 (PartI/Section-2) (LR). Tremie shall be used for placing concrete into the bore holes. GENERAL CONSIDERATIONS: The construction of pile foundation shall be in such a way that the load from the structure it supports, can be transmitted to the soil without causing any soil failure & without causing such settlement, differential or total under permanent transient loading as may result in structural damage and/or functional distress to the buildings.

7 When working near the existing structures, any damage to such structures shall be made good at no extra cost to the Department. The contractor shall, therefore, take adequate care to avoid any damage to the existing structures. In case of deep excavations adjacent to piles proper shoring or other suitable arrangement shall be done at no extra cost to the Department to guard against the lateral movement of soil or releasing the confining soil stress. As per loading details. piles will be required to withstand vertical load axial or otherwise and horizontal load associated with moments. Axial load from a pile should be transmitted to the soil through skin friction along the shaft and end-bearing at its tip. A horizontal load shall be transmitted to the sub-soil by horizontal sub-grade reaction generated in the upper part of the pile shaft. 4 Coarse Aggregate Fine Aggregate & Water: Coarse aggregate fine aggregate and water shall conforming to IS 456 ( ) and 383 ( ).

8 Concrete: Concrete to be used for the pile shaft shall be as specified. Materials and method of manufacture for cement concrete shall, in general, be in accordance with the method of concrete under the condition of pile installation. Consistency of concrete mix for cast-in-situ piles shall be suitable to the method of installation of piles. Concrete mix shall be so designed as to have a homogeneous mix having a flowable character consistent with the method of concreting of pile. The slump of concrete shall range between 150 to 180 mm depending on the method/manner of concreting. Minimum cement content shall be 400 kg per cubic metre. In case of piles where concreting is done under water or drilling mud using methods other than tremie 10% extra cement over that required for the design grade of concrete at specified slump shall be used subject to minimum quantities of cement specified above. Cost of excess cement over the minimum quantity specified shall be borne by the contractor.

9 For mix design, manufacture, placing etc. specification for cement concrete given hereinafter shall be referred. WORKMANSHIP: Control of piling installation: Bored cast-in-situ piles shall be installed by employing suitable drilling rigs using a combination of bailer and a suitable chisel with DMC method. Bore hole shall be stabilized by bentonite as drilling mud and concreting shall be done by use of tremie only. Control of Alignment: Piles shall be installed as accurately as possible as per the designs and drawings. Greater care should be exercised in respect of installation of single pile or piles in two pile groups. The piles shall be installed vertically with tolerance as stipulated by IS: 2911 (Part-1/Section-2) (Latest revision). Piles shall not deviate by more than 75 mm or D/6 whichever is less in case of piles having diameter less than 600 mm, 75 mm or D/10 whichever is more in the case of piles having diameters more than 600 mm from their designed positions at the working level.

10 In the case of a single pile in a column, positional tolerance should no be more than 50 mm or D/6 which ever is less (100 mm in case of piles having diameter more than 600 mm). In case of piles deviating beyond these limits, contractor shall carry out necessary remedial measures duly approved by the Department at no extra cost. Piles that are deviated to such an extent that the resulting eccentricity cannot be taken care of by a redesign of the pile cap or plinth beams, the piles should be re-placed or supplemented by one or more additional piles at no extra cost to the Department. A minimum length of two/three metres of temporary guide casing up to piling platform shall be inserted in each bored pile after completion of bailer driving. Additional length or temporary casing may be used depending on the condition of the strata, ground water level etc. Founding level: The bore hole shall be advanced by chisel and direct mud circulation method after installation of guide casing till the required founding level is reached.