泥岩隧洞围岩渐进性变形与破坏机制探索

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Abstract In order to solve the problem of sustained large deformation of mudstone tunnel surrounding rock after construction，the geological conditions revealed by tunnel excavation and measured deformation law are combined，as well as the corresponding numerical experiments. Result shows that some impermeable layers exist in the tunnel surrounding rocks and subsequent excavation led to destruction of surrounding rock impermeable layer. Then the groundwater flows to dry zone and softens the surrounding rocks of original dry zone gradually，which result in re-deformation of stabilized surrounding rock and damage of supporting structures. Through the comprehensively comparative analysis of treatment measures in numerical experiments and field tests，the measure of platoon and guide is more reasonable，economical and effective.

Key words： tunnelling engineering mudstone tunnel deformation mechanism of surrounding rocks treatment measure monitoring numerical experiments

Received: 18 September 2013

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https://rockmech.whrsm.ac.cn/EN/Y2014/V33/IS1/3087

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