Stochastic finite element analysis of surrounding rock and lining of tunnels under external water pressure
DING Hao 1 2 3, JIANG Shuping 2 3, YANG Linde 1
1. Department of Geotechnical Engineering Tongji University Shanghai 200092 China 2. Department of Tunnel Engineering Chongqing Communications Research Design Institute Chongqing 400067 China 3. Key Laboratory of Communications of Tunnel Construction Maintenance Technology Chongqing 400067 China
Abstract：In order to investigate the bearing behaviors of surrounding rock and lining of tunnels under external water pressure, the numerical simulation based on the stochastic finite element method (SFEM) is conducted to analyze the behaviors of Longtan tunnel. In SFEM, the response surface method (RSM) and the Monte-Carlo method are adopted. In the analysis, the following calculations are made: i) fitting responsive surface equation, ii) analysis on probability sensitivities and correlations. It is shown that the failure mode of the lining under external water pressure is mainly compressive failure; the increase of the elastic modulus of surrounding rock is more effective than that of the lining. Based on the analysis, in lining design and tunnel construction under external water pressure, the following factors should be considered the bearing characteristics of surrounding rock, the calculation model of layer structure method and the grouting effects including water plugging and reinforcement.
丁浩；蒋树屏；杨林德；. 外水压下隧道围岩与衬砌的随机有限元分析[J]. 岩土工程学报, 2009, 31(4): 643-647.
DING Hao 1 2 3, JIANG Shuping 2 3, YANG Linde 1. Stochastic finite element analysis of surrounding rock and lining of tunnels under external water pressure. Chinese J. Geot. Eng., 2009, 31(4): 643-647.
