The stability of tunnel surrounding rock support in bad geological area is the key point to ensure safe construction.Based on the construction of extra-long tunnel in frozen soil region,the paper analyzes the cause mechanism and treatment method of surrounding rock instability in combination with regional hydrogeological condi-tions.The analysis shows that the stability of surrounding rock is poor,the joints are more developed,the rock is more broken,and the construction support is insufficient,which is the main influencing factor of the instability of surrounding rock.By improving the support mode,controlling the deformation of surrounding rock,and using soft-ware simulation calculation,the support effect is verified.Provide certain reference significance for the tunnel con-struction in bad geology area.
关键词
围岩失稳/地质勘察/岩性/模拟计算
Key words
surrounding rock instability/geological investigation/lithology/analog calculation
维普
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