【作者】 付铁军； 钟祖良； 詹树高； 王益； 陈宇波；

【Author】 FU Tiejun;ZHONG Zuliang;ZHAN Shugao;WANG Yi;CHEN Yubo;Chongqing Rail Transit (Group) Co.,Ltd;School of Civil Engineering,Chongqing University;China Construction Tunnel Construction Co.,Ltd;

【机构】 重庆市轨道交通(集团)有限公司； 重庆大学土木工程学院； 中建隧道建设有限公司；

【摘要】 灰岩地区岩溶发育,受隧道开挖地下水排放,导致溶蚀通道内岩土颗粒流失,易引发地表覆土层塌陷,为保障隧道建设和塌陷区域居民生命安全,减少塌陷损失,以重庆二横线西段岩溶塌陷为研究对象,结合隧道洞内外地质调查,分析得出土主隧道K9+800～K10+100段塌陷类型主要为"漏斗形",塌陷规模随着塌陷深度的增加不断扩大。结合塌陷影响因素将塌陷演变过程分为三个阶段,考虑外部因素对岩溶塌陷的影响,提出水流冲刷作用下上覆土层稳定性影响分析和周边建筑对塌陷区稳定性影响评价方法。针对塌陷区影响因素,采用监控量测+防排水系统+填埋灌注相结合的防治措施,为解决岩溶塌陷问题提供参考价值。更多还原

【Abstract】 Karst is developed in the limestone area.The groundwater is discharged by tunnel excavation,which leads to the loss of rock and soil particles in the dissolution channel.And it is easy to cause the collapse of the overlying soil layer.In order to ensure the safety of the residents in the tunnel construction and the collapsed area,and reduce the collapse loss,the karst collapse in the western section of the Chongqing Erheng Line is taken as the research objectcombiningwith geological survey inside and outside of the tunnel.It was analyzed the collapse typeof the K9+800 ～ K10+100 section of the Tuzhu Tunnel which is mainly " funnel-shaped".The size of the collapse continues to expand as the depth of the collapse increases.The collapse evolution process is divided into three stages combining the influencing factors of the collapse.A method for the analysis of the stability of the overlying soil layer under the action of water flow and the evaluation method of the influence of surrounding buildings on the stability of the collapsed area is proposed considering the influence of external factors on karst collapse.In view of the influencing factors in the subsidence area,a combination of monitoring and measurement+water-proof and drainage system+landfill perfusion is adopted to prevent and control karst collapse.It can provide reference value for solving the problem of karst collapse.更多还原