摘要
采用三维非线性有限元弹塑性损伤力学对琅琊山地下电站的Y岔圆形调压井的洞室围岩进行了分析计算,对各种工况下的围岩稳定和支护参数的合理性进行了评述.根据岩体损伤开裂后的应力应变关系,提出了变损伤刚度迭代计算方法,有效地反应了岩体损伤开裂后的围岩破坏特性;采用隐式锚杆柱单元模拟锚杆的支护效应,合理地反应了洞室开挖过程中的锚杆支护受力特性.通过对地下Y岔圆形调压井洞室围岩稳定分析计算,论证了该方法的可行性与合理性,为同类地下工程问题演示了一套完整的分析计算方法.
The stability of Langyashan throttled surge chamber in rock mass with steep obliquity is analysed by using three-dimensional nonlinear FEM. Stability of surrounding rock mass and the rationality of the anchorage support parameters for all cases are reviewed. The failure state of damaged surrounding rock and the force-bearing state of anchorage support are both efficiently responsed by using variable stiffness iterative computing method submitted here and adopting hidden anchor bars unit imitate anchorage supporting effects at the same time. The feasibility and rationality of this method are verified with a case study of a surge shaft with a Y-type bifurcation. It is a better numerical analysis method for resolving similar questions.
出处
《武汉大学学报（工学版）》
CAS
CSCD
北大核心
2003年第5期55-59,100,共6页
Engineering Journal of Wuhan University
关键词
有限元
调压井
锚杆
围岩
分析计算
finite element analysis
surge chamber
anchor
stability of surrounding rock mass
numerical analysis method
