A mountain tunnel reconstruction expanding excavation construction method
A construction method and technology for tunnel construction, applied in tunnels, tunnel linings, earthwork drilling, etc., to control construction risks, ensure safety and quality, and reduce load work ΔT
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[0031] The present invention will be further elaborated and illustrated below in conjunction with the accompanying drawings and specific embodiments. The technical features of the various implementations in the present invention can be combined accordingly on the premise that there is no conflict with each other.
[0032] The construction method of reconstruction and expansion of mountain tunnels, the steps are as follows:
[0033] (1) Ascertain the position and relative size of the collapse cavity of the old tunnel
[0034] Use geological radar and other equipment to find out the location and relative size of the collapsed cavity of the old tunnel, mark it on the lining surface of the old tunnel, and make a construction record, which will be used as the basis for the reconstruction design of the old tunnel.
[0035] (2) In the section where there is no cavity in the tunnel, the excavation, support and construction shall be carried out according to the requirements of convent...
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