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.