HINDUSTAN PETROLEUM CORPORATION LIMITEDADDL ATF-APT TANKAGE PROJECT- BAHADURGARH TERMINAL (TENDER FOR MISCLLANEOUS WORK)

4- SOLING & HARDCORE 1.00.00

GENERAL

1.01.00

The work covered under this specification includes all type of soling work either by rubble stones laid under floors / hard core under foundations, hand packed, complete as per under mentioned specification and applicable drawings.

2.00.00

RUBBLE STONE SOLING

2.01.00

The rubble stone shall be of best variety of black trap / granite / basalt or other approved variety of stone available locally. The stone shall be hard, durable, free from defects and of required size and shall be approved by the Engineer in-charge before incorporation in the work.

2.02.00

Preparation of Surface & laying:

2.02.01

The bed on which rubble soling is to be laid shall be cleared of all loose materials, levelled, watered and compacted and got approved by the Engineer In-charge before laying rubble soling. Cable or pipe trenches if shown in the drawing and as required by the Engineer in-charge shall be got done before the soling is started.

2.02.02

Over the prepared surface, the stone shall be set as closely as possible and well packed and firmly set. The stones shall be of full height and shall be laid so as to have their bases of the largest area resting on the sub-grade. Soling shall be laid in one layer of 230mm or 150mm or other specified thickness and no stones shall be less than 230mm or 150mm depth or specified thickness of soling with a tolerance of 25mm.

2.02.03

After packing the stones properly in position, the interstices between them shall be carefully filled with quarry spoils of stone chips of larger size possible to obtain a hard, compact surface. Spreading of loose spoils or stone chips is prohibited.

2.02.04

The entire surface shall be examined for any protrusions and the same shall be knocked off by a hammer and all interstices shall be filled with approved murrum. Excess murrum if any over the surfaces shall be removed. Unless otherwise specified, the murrum shall be supplied by the contractor at his own cost from the selected areas. The surfaces shall then be watered and consolidated with mechanical or sufficiently heavy wooden tampers and logrammers as approved by the Engineer in-charge to give the required slope or level and dense sub-base. After compaction, the surface shall present clean

4-Soling & Hardcore

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HINDUSTAN PETROLEUM CORPORATION LIMITEDADDL ATF-APT TANKAGE PROJECT- BAHADURGARH TERMINAL (TENDER FOR MISCLLANEOUS WORK)

look. Adequate care shall be taken by the contractor while laving and compacting the rubble soling to see that concrete surfaces in with soling are not damaged. 3.00.00

HARD CORE FOR FOUNDATIONS

3.01.00

Where specifically mentioned in the drawings, hard core layer shall be provided as a preparatory surface to receive blinding concrete/ leveling course.

3.02.00

Hard core layer shall comprise of well graded broken stones 80mm nominal size with the following gradation: IS Sieve designation 80 mm 63 mm 40 mm 20 mm 10 mm

% ing 100 85-100 0-30 0-5 0-5

3.03.00

The hard broken stones layer shall be directly placed over the compacted layer of under lying soil in layers. The stones shall be hand packed and crevices filled with broken stones.

3.04.00

Each layer shall be covered with clean river sand and thoroughly worked into the crevices with a water jet. Additional layers of sand shall be placed on top and worked into the void spaces. The process shall be repeated until no more sand and water get into the voids.

3.05.00

earth rammer shall be used to compact each layer if directed by Consultant.

3.06.00

The thickness and area covered beyond the blinding concrete shall be as indicated in the drawings or as indicated by Consultant.

4-Soling & Hardcore

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