二道垭隧道开挖与支护的数值模拟分析  

Numerical simulation analysis and its application of tunnel excavation and support of the Erdaoya tunnel

作　　者：刘豆豆[1] 陈卫忠[1] 杨建平[2] 伍国军[2] 李晓静[1] 杨为民[1] 

机构地区：[1]山东大学土建与水利学院岩土与结构工程研究中心 [2]中国科学院武汉岩土力学研究所,湖北武汉430071

出　　处：《山东大学学报（工学版）》2007年第1期80-85,共6页Journal of Shandong University（Engineering Science）

基　　金：国家自然科学基金(No.50579087);国家自然科学基金重大研究计划(No.90510019)

摘　　要：大量工程实践表明,岩体工程开挖后的应力调整和变形并不是瞬时完成,本文采用大型有限元工程模拟分析软件ABAQUS,模拟二道垭隧道的开挖与支护过程,研究隧道开挖后考虑不同的应力释放比例后再支护时,围岩的变形及锚杆的受力情况.计算结果表明:对于松软岩层来说,考虑应力释放后再支护的计算结果更好地反映工程围岩的变形和破坏特性.A large number of engineering examples show that the stress adjust and displacement of rock mass during excavation are not completely instantaneous. The FEM numerical ABAQUS is used to simulate the excavation and support process of the Erdaoya tunnel. The mechanical behavior of the surrounding rock mass and bolts under different stress release ratios is obtained from numerical simulations. The results show that the calculation results for consideration of stress release is better for soft rock, in reflecting the deformation and its danmge character of engineering.

关 键 词：数值模拟 围岩 支护 应力释放 

分 类 号：TU457[建筑科学—岩土工程]