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Collapsed tunnel's fate rests on site investigation


CONSULTANTS AND health and safety officals were this week considering whether surviving sections of the collapsed Gerrards Cross rail tunnel would have to be demolished.

A Health & Safety Executive spokesman said an intrusive site investigation by consultant White Young Green would determine whether the rest of the tunnel would be kept or dismantled.

Design and build contractor Jackson Civil Engineering was building the tunnel as part of a £20.3M air rights project for retailer Tesco. Jackson's consultant was White Young Green. The 30m section collapsed onto the busy London to Birmingham rail line at 7.30pm on Thursday 30 June (NCE 7 July).

The project involved installing a concrete vault over the twin track commuter line, which runs through a cutting.

The vault was then covered with fill to raise the floor of the cutting to original ground level.

Last week contractors completed removal of damaged concrete elements and fill from the railway in the collapse zone.

Jackson Civil engineering was this week checking construction work against design drawings to determine the cause of the collapse which hit a 30m section of the tunnel.

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