围岩抗力系数作为隧道设计中的重要参数,一直作为工程界的热点研究问题;但对于高烈度地区和地震活跃地区而言,常规方法测试获得的围岩抗力系数显然是过于理想的.借鉴了地震工程中拟静力分析的方法,将地震力抽象成一个水平加速度,建立了相应的计算模型.通过构建分析参量函数的方法,提取了内部支撑力的量、水平地震加速度、隧道埋深和半径之比、岩土体容重、岩土体黏聚力、岩土体内摩擦角的内部联系关系;将围岩抗力系数和地震加速度作为变量,埋深和半径之比等量为常量,在Bottero和Kummar的研究基础上进行了敏感性分析,获得了在不同条件下围岩抗力系数和地震加速度之间的函数关系.研究对高烈度地区的隧道围岩抗力系数的获取具有重要的帮助意义.%As an important parameter in the design of tunnels,the resistance coefficient of surrounding rock has been a hot research topic in the field of engineering.But for the high intensity region and the active area of the earthquake,the traditional resistance coefficients of the surrounding rock to direct the tunnels designs are obviously too ideal.It is enlightened from the pseudo static analysis in earthquake engineering,the seismic force is abstracted into a horizontal acceleration,and the corresponding calculation model was established.The constructing of the analysis parameters function absorbed the internal relations of the internal relations between the amount of internal support force,horizontal seismic acceleration,the ratio of soil bulk density,soil bulk density,and the internal friction angle of rock and soil.The sensitivity analysis was carried out based on Kummar's and Bottero's theories,acquiring the relation functions between the resistance coefficients with the seismic accelerations under different constant conditions.This study has significant meaning for the acquisition of the resistance coefficients of tunnels surrounding rock in high intensity area.
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