【作者】 谭志宏； 唐春安； 曹武安；

【Author】 TAN Zhi-hong~1 TANG Chun-an~2 CAO Wu-an 1.CRISR,Northeastern University,Shenyang 110004,China; 2.School of Civil & Hydraulic Engineering,Dalian University of Technology,Dalian 116024,China

【机构】 东北大学 岩石破裂与失稳研究中心； 大连理工大学 土木水利学院；

【摘要】 利用大连力软公司开发的基于强度折减法的 RFPA-Slope 对顶溶洞对于隧道围岩稳定性的影响进行了数值模拟分析,直观地得到了不同尺寸跟距离的溶洞对稳定性的影响以及隧道的破坏过程,同时求得安全系数。数值分析结果表明：顶溶洞对隧道围岩稳定性影响差别相对不大,对隧道的破坏形式影响单一,溶洞越大,相距越远,影响相对也就越小,但是其中存在一个安全系数最小点。在工程中,要注意隧道围岩自身的稳定性。更多还原

【Abstract】 The stability numerical analysis on wall rock of the karst cave at the top of the tunnel was conducted by using the RFPA-Slope incorporated with strength reduction.The numerical results show that the difference of the failure of the cave with different size and distance at the top of the tunnel is not obviously.With the augment of the diameter and the distance of cave,the safety factor declined first,then rose.There is a least point of the safety factor.In addition,the fracture process obtained with RFPA-Slope is significantly meaningful for the investigation of failure mechanism of slope.更多还原