【摘要】 军用洞库多依托山脉来建造,其稳定性受当地岩体条件影响较大。在前人研究的基础上,采用数值模拟方法,分析不同地应力与节理倾角对洞库稳定性的影响。数值计算结果表明:较大的水平地应力有利于大跨度洞室的稳定;同时,当节理倾角小于55°或侧压系数大于1. 25时,洞库开挖安全系数均大于1;当节理倾角较大时,随着水平地应力的增大,洞库安全系数整体上明显呈增大状态;当节理倾角较大且测压系数小于1. 50时,安全系数随节理倾角的增大而明显减小。更多还原

【Abstract】 The construction of the military cavern rely on the mountains. Its stability is greatly influenced by local rock condition. In this paper,on the basis of previous studies,we analyze the influence of different tectonic stress and joint inclination of the stability of cavern by the method of numerical simulation. Numerical results show that,the large horizontal tectonic stress is beneficial to the stability of large span caverns; at the same time,when the joint orientation is less than 55 degrees or the lateral pressure coefficient is greater than 1. 25,the safety factor of cavern is greater than 1; when the joint orientation is large enough,the safety factor of cavern significantly increased with the increase of horizontal tectonic stress; when the joint orientation is large and the pressure coefficient is less than 1. 50,the safety factor of cavern decreases obviously with the increase of joint orientation.更多还原