摘要
详细地研究了闭合裂纹在单轴、双轴载荷作用下,裂隙扩展、贯通的规律,应用8节点奇异等参单元模型来模拟节理尖端应力场的奇异性,实验和数值计算结果所得到的闭合裂隙的扩展规律具有较好的一致性,实验结果对研究裂隙岩体在开挖卸荷条件下的力学特性具有一定的参考价值。最后,将砂岩圆柱梁三点弯曲测试验得到的KIC,计算万家寨引黄工程总干一、二级泵站地下厂房在开挖和支护过程中围岩的破损区。
The propagation and coalescence mechanism of closed joints under uniaxial and biaxial compressive stress is studied by rock-like material model tests. 8-node singular isoparametric element mode is applied to simulate the stress field near crack tip. Both the numerical and experimental results of crack propagation are in consistence. The new results are useful to study mechanical properties of jointed rock mass. Furthermore, based on the laboratory test results of KIC the propagation area of fractures in surrounding rock mass of pump stations of Shanxi Yellow River Diversion Project during excavation and support is obtained.
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2003年第1期18-23,共6页
Chinese Journal of Rock Mechanics and Engineering
