隧道围岩反分析与施工数值模拟

结合殷家岩隧道施工,对隧道围岩进行了位移反分析,得到了围岩松动区的弹性模量;应用反分析结果进行数值模拟,预测后续施工步的位移和应力;同时,将预测结果与现场观测进行比较,检验反分析结果。结果表明,利用反分析得到的围岩参数预测后续施工步的位移与现场观测结果比较吻合。

Back Analysis of the Surrounding Rocks of Tunnels and Numerical Simulation of Tunnel Construction

In this paper,displacement back analysis was made for the tunnel surrounding rock of Yin Jia-yan tunnel,and elastic modulus in loose part was get.Displacement and stress in follow-up construction procedure was predicted by the results of back analysis.Meanwhile,the comparison between forecast results and actual measurable data was done to check the result of back analysis.Result show that forecasting displacement with parameters got from back analysis is coincide with the actual measurable displacement.