岩土工程学报Issue(10)：1908-1914,7.DOI:10.11779/CJGE201410019
主应力方向对围岩稳定性的影响
Effect of principal stress orientation on stability of surrounding rock of tunnels
摘要
Abstract
In order to investigate the effect of principal stress orientation on the stability of the surrounding rock of tunnels, experimental and numerical studies are performed. Cement mortar models are applied, and two cases for the tunnel with and without cracks are considered. Photoelastic experiments are conducted to confirm the results of the cement mortar model tests. In the numerical simulation, the plastic damage of concrete damaged plasticity is adopted. The stresses at the points around the tunnel and the stress intensity factor of crack tips are calculated, and the results are in good agreement with the experimental ones. The results show that for the tunnel without cracks, when the angel of principal stress orientation and tunnel wallθ=45°, the compressive strength is the lowest;for the tunnel with a crack, when the angel of crack direction and tunnel wallβ=130°, the stress intensity factor of crack tips is the largest, and the compressive strength is the lowest, and for the tunnel withβ=130°, whenθwas small orθ=70°, the lowest compressive strength occurs.关键词
主应力方向/隧道/数值模拟/应力强度因子Key words
principal stress orientation/tunnel/numerical simulation/stress intensity factor分类
建筑与水利引用本文复制引用
李元鑫,朱哲明,范君黎..主应力方向对围岩稳定性的影响[J].岩土工程学报,2014,(10):1908-1914,7.基金项目
国家重点基础研究发展计划（973计划）项目（2010CB732005）；国家自然科学基金项目（51074109）；四川省科技计划项目（2014JY0002）；油气藏地质及开发工程国家重点实验室资助项目 （）
