Tunnel excavation construction method
A tunnel excavation and construction method technology, which is applied in tunnels, tunnel linings, earthwork drilling, etc., can solve the problems of variable cross-section construction difficulty, heavy construction workload, and severe cross-section changes, so as to avoid the risk of excavation expansion, The effect of small construction workload and simple process
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[0038] Hereinafter, the concept, specific steps and technical effects of the present invention will be further described in conjunction with the accompanying drawings to fully understand the purpose, features and effects of the present invention.
[0039] Such as figure 2 As shown, in the subway tunnel excavation construction method provided by the present invention, the tunnel to be excavated includes the first mainline tunnel conventional section 11, the first mainline tunnel expansion section 12, and the second mainline tunnel conventional section 13, The second mainline tunnel enlarged section 14, the largest section tunnel section 16. Because the method provided by the present invention is mainly used for the excavation and construction of subway section tunnels containing crossover and stop lines, therefore, the conventional section of the first main line tunnel mentioned here refers to the tunnel section that only accommodates the first main line ; The conventional sectio...
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