深圳地铁下水径车站施工过程安全性评估探讨

摘要

安全性评估指数研究作为一种分析结构受力过程安全性的理论手段在隧道仿真及监测数据处理等方面有着越来越广泛的应用.结合深圳地铁5号线下水径车站隧道工程的设计和施工,通过采用有限差分法程序FLAC3D进行模拟,探讨了在Mohr-Coulomb破坏准则下采用应力路径法及主应力空间法对地铁车站施工过程进行安全性评估分析的方法;得出了三维受力状态下,主应力空间法计算安全评估指数更为准确的结论.%Safety assessment has become a theoretical means for analyzing metro security, and has been widely applied in tunnel simulation and monitoring data disposal recently. With an investigation of the safety assessment analysis method in Mohr - Coulomb failure criterion, and through the finite differential code FLAC3D simulation, the method of stress path and principal stress space are used to analyze the safety assessment in the design and construction of Xiashuijing Section of Shenzhen Metro Line 5. The a-chievement indicates that the principal stress space method is more accurate for analyzing safety assessment.