摘要
依托洞宫山隧道送、排风竖井,采用理想弹塑性材料本构关系及莫尔-库伦屈服准则,建立了三维有限元模型,对围岩受力及变形特征进行了分析.给出了围岩的应力与位移分布特征以及竖井周边特征点的变形大小.同时,把竖井简化为三维平面轴对称受力模型.利用弹性力学知识解答,得到了解析解.通过解析解与数值模拟的结果对比分析,得到了竖井围岩的变化规律,为超深竖井的施工提供参考.
Based on Gongshan tunnel blowing shaft and exhaust shaft, the ideal elasto- plastic material constitutive relation and Moore-the coulomb＇s yield criterion are used and a three-dimensional finite element model is built for the analysis of surrounding rock stress and deformation characteristics, and the surrounding rock stress and displacement distribution characteristics of the feature are pointed out according to the shaft deforma- tion size. But in the meanwhile, vertical shaft for 3D axisymmetrie simplified plane stress model based on the elastic mechanics is considered, an analytical solution is ob- tained. The change of surrounding rock by vertical shaft is analyzed according to the an- alytical solution and the numerical simulation result.
出处
《交通科学与工程》
2012年第2期61-66,共6页
Journal of Transport Science and Engineering
关键词
围岩
竖井
应力
应变
数值模拟
surrounding rock
shaft
stress
strain
numerical simulation
