地下管道漏水引发基坑失稳机理探讨  

Discussion on Underground Pipe Leakage Induced Instability Mechanism of a Foundation Pit

作　　者：孙静[1] 张华[1] 

机构地区：[1]三峡大学三峡库区地质灾害教育部重点实验室,湖北宜昌443002

出　　处：《三峡大学学报（自然科学版）》2007年第6期505-509,共5页Journal of China Three Gorges University：Natural Sciences

基　　金：国家自然科学基金资助项目(50609012)

摘　　要：城市基坑开挖施工过程中,如果施工不当或者基坑变形等原因可能引起城市输水管道破损,管道漏水常常引发基坑失稳.以深圳某基坑失稳为例,分析了管道轻微破损和严重破损漏水时基坑边壁非饱和土体中孔隙水压力场的变化,以及基坑边壁土体稳定性随时间的变化,探讨了此类基坑失稳的原因.During urban foundation pit excavation, underground pipes are occasionally damaged by inappropriate constructions or large deformation. Pipe leakage sometimes induces foundation pit failure. A failure case of a foundation pit in Shenzhen is illustrated. The pore water pressure distributions in unsaturated side of the foundation pit are simulated both for slightly damaged and severely damaged cases. By applying the pore water pressure results to slope stability analysis,the safety factor of the foundation pit cut slope stability is calculated at different simulating time. Then,the instability reasons and features of the study case are discussed.

关 键 词：基坑失稳 管道漏水 非饱和渗流 稳定性分析 

分 类 号：TU99[建筑科学—市政工程]