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Repair to BT roads at Jaggayyapet Lime Stone Mines. - Vizag Steel

Repair to BT roads at Jaggayyapet Lime Stone Mines. - Vizag Steel

Repair to BT roads at Jaggayyapet Lime Stone Mines. - Vizag Steel

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1.0<br />

2.0<br />

VISAKHAPATNAM STEEL PLANT<br />

SPECIFICATION FOR ROAD AND PAVING WORKS<br />

SCOPE:<br />

The scope of work under this contract covers the maintenance of Roads and Drains inside<br />

the plant area, complete in all respects as shown in the drawings (if any) and as<br />

indic<strong>at</strong>ed in the specific<strong>at</strong>ions and BOQ.<br />

GENERAL:<br />

The work shall confirm <strong>to</strong> the "Specific<strong>at</strong>ion for road and bridge work" published by the<br />

Indian Road Congress (IRC) on behalf of the Govt. of India, Ministry of Surface Transport<br />

(Road Wing), New Delhi.<br />

2.1 Earth work:<br />

2.1.1 Prepar<strong>at</strong>ion of Cut form<strong>at</strong>ion:<br />

The Section <strong>to</strong> be constructed shall be excav<strong>at</strong>ed or formed <strong>to</strong> levels shown on the<br />

drawings. The bot<strong>to</strong>m of the excav<strong>at</strong>ion shall be compacted as specified and the<br />

bot<strong>to</strong>m and size checked for conformance <strong>to</strong> drawings in respect of cross-section and<br />

Gradient with a scr<strong>at</strong>ch templ<strong>at</strong>e moving over guides loc<strong>at</strong>ed suitably. The templ<strong>at</strong>e shall<br />

have points placed not more than 200 mm apart and shall be an exact elev<strong>at</strong>ion of the<br />

cross section. All high points shall be removed and low areas backfilled after<br />

scarifying and providing proper bond. The surface shall be rolled with 8 <strong>to</strong> 10 <strong>to</strong>n<br />

power roller <strong>to</strong> <strong>at</strong>tain the specified Compaction. Haulage of m<strong>at</strong>erials over the formed<br />

surface shall not be permitted.<br />

The sub-grade shall comply with the following requirements:<br />

a) No soft spots shall be present;<br />

b) It shall be properly drained during construction;<br />

c) The minimum compaction <strong>at</strong> sub-grade level shall be not less than 100% of maximum<br />

Labora<strong>to</strong>ry dry density as per IS:2720 (Part - VII).<br />

Where the m<strong>at</strong>erial in the sub-grade (th<strong>at</strong> is within 0.5 Metre of the lowest part of the<br />

pavement) has a density less than 100% of the maximum dry density determined according<br />

<strong>to</strong> IS:2720 (Part-VII), the same shall be loosened <strong>to</strong> a depth of 500 mm and Compacted<br />

in 250 mm thick loose layers in accordance with the requirements of Clause 2.1.3. Any<br />

unsuitable m<strong>at</strong>erial encountered <strong>at</strong> the form<strong>at</strong>ion level shall be removed <strong>to</strong> a depth<br />

indic<strong>at</strong>ed by the Engineer and replaced with suitable m<strong>at</strong>erial compacted in accordance<br />

with Clause 2.1.3. In rocky form<strong>at</strong>ions, the surface irregularities shall be corrected and<br />

the levels brought up <strong>to</strong> the specified elev<strong>at</strong>ion with sub-base or base m<strong>at</strong>erial as directed<br />

by the Engineer, laid and compacted in accordance with the respective specific<strong>at</strong>ions for<br />

these m<strong>at</strong>erials.

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