基于Drucker-Prager分析深埋球形洞室弹塑性

基于岩体力学中关于深埋圆形洞室的假设和Drucker-Prager准则,推导了深埋球形洞室开挖后应力弹性分布、塑性分布和塑性区半径的公式,并用所得到的公式与圆形洞室进行了比较,算例表明,在相同荷载和岩体强度参数的前提下,球形洞室的受力比圆形洞室的受力合理。

Elastoplastic analysis for deeply covered up spheroid hole room based on Drucker-Prager

Based on the hypotheses about deeply covered up rotundity hole room in rock mechanics and Drucker-Prager criterion,the analytical expression about the stress distribution of flexible area,plastic area and the plastic zone radius of deeply covered up spheroid hole room are given.The compare is carried on with the deeply covered up rotundity hole room by use of the solution.Conclusions of discussion show that when the load and the strength parameters of rock mass is equal,the stress distribution about deeply covered up spheroid hole room is more reasonable than that of deeply covered up rotundity hole room.