In the construction process of the tunnel crossing fault fractured zone in the earthquake-prone area,construction monitoring is an important means to check whether the design and construction are reasonable and whether the surrounding rock and structure are safe and stable,and to ensure safety.This paper takes a tunnel crossing the fault fractured zone in the earthquake-prone area on Sichuan section of Xi'an-Chengdu passenger dedicated line as the engineering background.Through the regression analysis of the monitoring data,it is found that the convergence rate-time,cumulative convergence value-time relationship and cumulative settlement value-time relationship are logarithmic,and the settlement rate-time relationship is exponential.In addition,the steel frame support parameters are optimized by numerical simulation,the results of numerical simulation and construction monitoring show that the optimized vault settlement and horizontal convergence have obvious"convergence"trend with time,and the settlement of each section is less than the reserved deformation for construction excavation,which verifies that the adjusted support parameters are reasonable and feasible.The relevant conclusions can provide reference for the tunnel construction and similar engineering.
earthquake prone areafault fractured zonetunnel construction monitoringregression analysis
NETL
NSTL
万方数据
