双洞交叉的施工稳定性分析及支护设计

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Abstract The numerical simulation analysis and optimal design for the intersection of diversion tunnel and discharge tunnel are conducted. The stability and strength of the bolt and shotcrete of the tunneling are simulated and checked firstly，and then the stresses in the final lining system are calculated and checked for the diversion tunnel. The later excavated discharge tunnel to intersect the former diversion tunnel is also simulated and the safety behavior is checked with the construction sequences of bolting and shotcreting and final lining. The optimal shotcreting timing and the size and the thickness of lining are proposed finally.

Key words： intersection of two tunnels constructing stability FEM numerical simulation analysis

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https://rockmech.whrsm.ac.cn/EN/Y2002/V21/I11/1627