Experimental study on the collapse evolution law of unlined tunnel in Boulder-Cobble mixed formation
Tunnelling and Underground Space Technology(2023)
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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