基于数值模拟的某水工隧洞围岩参数反演研究

The Parameter Inversion of Surrounding Rock of a Hydraulic Tunnel Based on Numerical Simulation

本文主要对某水工隧洞的安全监测资料进行分析,得到某指定断面开挖过程中的围岩收敛变形过软件进行数值计算,分别从应力应变及位移方面进行分析,根据实测的围岩收敛变形对部分围岩的参数进行反演。结果表明,现场实测值与数值模拟的计算值拟合度高,从而验证所得参数的可靠度,为水工隧洞安全监控指标的拟定提供了依据。

This paper mainly analysed the safety monitoring data of a hydraulic tunnel,and obtained the convergence deformation process of surrounding rock during excavation of a specified section.The ANSYS finite element software was used for modeling,and Flac3D software was used for numerical calculation.The stress,strain and displacement were analyzed separately,and the parameters of some surrounding rocks were inverted according to the measured convergence deformation of surrounding rocks.The results showed that the fitness between the field measured values and the calculated values of numerical simulation was high,which verified the reliability of the parameters obtained,and provided a basis for the formulation of safety monitoring indicators for hydraulic tunnels.