秦岭Ⅱ线隧道围岩在不同温度下蠕变变形的有限元分析

Creep Analysis of Surrounding Rock of Qinling Tunnel Ⅱ at Different Temperatures by FEM

基于秦岭隧道围岩在不同温度下蠕变特性的试验结果及现场实测初始地应力和物理力学参数 ,本文用弹—粘塑性有限元方法对秦岭Ⅱ线导洞围岩在不同温度下变形的时效性进行了模拟计算 ,一方面可预计围岩是否会发生蠕变失稳 ,另一方面计算结果可为围岩的支护设计提供科学依据。

Based on the test results and field measuerment of initial ground stress and physical mechanical parameters of creep characteristics,the time dependent property of surrounding rock of Qinling tunnelⅡ at different temperatures was simulated using elasto viscoplastical FEM,on one hand,whether the creep damage would accur or not can be predicted,on the other hand,the calculating results can be regard as scientific basis for supporting design of surrounding rock.