【作者】 谭志宏； 唐春安； 杨天鸿； 芮勇勤；

【Author】 TAN Zhi-hong~1 TANG Chun-an~1 YANG Tian-hong~1 RUI Yong-qin~2 (1.CRISR,Northeastern University,Shenyang 110004,China;2.Changsha University of Science & Technology,Changsha 410076,China)

【机构】 东北大学岩石破裂与失稳研究中心； 长沙理工大学；

【摘要】 本文运用RFPA 系统的强度折减版以清水大桥5号断面为背景对桥墩底部溶洞区对其上部围岩稳定性的影响进行了数值分析研究。研究结果表明:岩溶对其上层围岩的影响范围随着深度的增大而变大;破坏效应带主要是在垂直于自由面的溶洞两侧;对多溶洞而言,应力主要集中在两溶洞破坏效应带之间的区域,并且主要在此发生破坏,而在其内部效应带之间则比较稳定。更多还原

【Abstract】 Karst caves is a important problem for the construction.This paper makes the research on numerical analysis of influenceof Karst caves under the pier on stability of its surrounding rock mass by using the RFPA software and yet analyses the instanceof No.5 plane of Qingshui Bridge.The following results has been given.The influenced area the caves made is relative to itsdepth,the deeper the depth is,the larger the area is.The destroying domino effect area is mainly concentrated on the area be-side the plane which is vertical to the free plane.If there are some caves,the stress is concentrated on the destroying dominoeffect area between two caves,and destroy occurs mainly there.更多还原