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31 May 2005

Mott MacDonald wins new contract for Delhi Metro

Mott MacDonald’s Indian company, Dalal Mott MacDonald, has been awarded the detailed design for Mandi House metro station by Delhi Metro Rail Corporation. The £9 million project is part of Line 3 of the new Delhi Metro.

Mandi House station is a single level underground station 27 m wide at each end increasing to 57 m in the middle with 185 m long side platforms. A mezzanine level midway along the platforms provides ticketing and plant room space either side of the tracks with a single bridge connecting the two halves of the station at mezzanine level for circulation. There are four entrances, two escalators and four lifts.

The station is located under Sikandra Road, an important and busy thoroughfare. In order to minimise traffic disruption, much of the station is to be built top-down which means the diaphragm wall panels are built from ground level and will form the permanent walls of the station. Excavation is then made to the underside of the roof level and the roof constructed. The ground level roads are then restored while construction proceeds underground with a smaller site area on the surface. The presence of many utilities crossing the station adds to the complexity of the roof structure.

Working to a tight schedule to suit the construction programme, Dalal Mott MacDonald’s role involves developing the detail design for all structural and architectural elements of the project. Electrical and mechanical design is being undertaken by Delhi Metro Rail Corporation, which also prepared the outline structural and architectural designs.

Construction of the station is already underway and is scheduled to be completed by May 2006.


Note to editors
On line 2 of the Delhi Metro, Mott MacDonald was the contractor’s designer and undertook the full structural and architectural design of the lines including six underground stations plus the E&M design for the system. This included design of Connaught Place station, an interchange with line 3, including line 3 platforms and the link tunnel between line 2 and line 3. Mott MacDonald also liaised with the designers of the west section of Line 3 to ensure compatibility of the underground station designs.
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