Experimental study on the collapse evolution law of unlined tunnel in Boulder-Cobble mixed formation

Yiwen Qin,Jinxing Lai,Xiaoyong Cao,Wenbo Zan,Zhihua Feng,Yongli Xie,Weimin Zhang

Tunnelling and Underground Space Technology（2023）

引用 7|浏览16

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摘要

•The surrounding rock’s collapse evolution shows exhibits suddenness, staging, and grouping.•Damage to the vault area has a greater impact than the sidewall area.•Control strategies for tunnel collapse in boulder-cobble mixed formations were proposed and verified.

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关键词

Boulder-Cobble Mixed formation,Collapse evolution,Pressure arch,Similar model test,Instability control strategy

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