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总结高地应力软岩隧道大变形成因,比较各种大变形预测技术,归纳大变形防治措施。分析表明:大变形形成机制、变形模式与一般围岩变形破坏不同,需要加强研究;目前还没有形成一套系统、完善和易于推广应用的现场地质分析、监测试验、分析评价预测体系;在支护参数方面,需要一套预测预报方法体系和相应工程对策;针对不同机制、不同等级的大变形,需制定合理大变形防治措施。以期为今后软岩大变形稳定性控制提供有益参考。
Summarizes the causes of large deformation of soft rock tunnels in high geostress and compares various large deformation prediction techniques to summarize the measures of prevention and control of large deformation. The analysis shows that the mechanism of large deformation and the deformation mode are different from the deformation and destruction of the surrounding rock in general. Therefore, there is no need to develop a set of system for site geological analysis, monitoring and testing, analysis and evaluation and prediction system. In terms of parameter protection, a set of prediction and forecasting methods and corresponding engineering measures are needed. For different mechanisms and different levels of large deformations, reasonable measures for prevention and control of large deformations should be formulated. In order to provide a useful reference for the future stability control of large deformation of soft rock.