第七届全国岩土工程实录交流会特邀报告——杭州地铁一号线湘湖站基坑事故再议  

Discussion on Accident of Foundation Excavation of Xianghu Station of Hangzhou Subway No.1 Line Again

作　　者：李广信[1] 

机构地区：[1]清华大学水沙科学与水利水电工程国家重点实验室,北京100084

出　　处：《岩土工程技术》2015年第6期273-279,共7页Geotechnical Engineering Technique

基　　金：国家自然科学基金项目(51279085);重点基础研究发展计划(973)项目(2013CB036402);水沙科学与水利水电工程国家重点实验室(2013-KY-4)

摘　　要：对7年前发生的杭州地铁湘湖站基坑事故进行了较全面地分析,从施工、设计和管理诸方面提出了讨论。也对我国相关的基坑规范及其应用提出了质疑。作者认为,对该工程事故施工者负有不可推脱的责任;同时也指出,在基坑稳定分析中对饱和软黏土使用固结不排水强度指标和饱和重度是不当的,设计对于高灵敏度软黏土没有给予应有地重视,在整个施工过程中没有封闭风情大道是一个失误。In the paper,some discussions on accident of foundation excavation of Xianghu Station of Hangzhou subway No.1 line are proposed from construction,design and management.Some questions are proposed about codas concerned with building foundation excavation and its applications.It is indicated that constructors have important blame in the accident.In the design of the engineering,there are mistakes.For example,in analyses of stability against overturning of retaining structure,overall stability by Swedish circle method and stability against heaving of pit bottom,if the CU shear strength parameters of saturated clay are adopted,the resistant force has to be calculated by buoyant unit weight rather than by saturated unit weight of soil.The high sensitive of clay is not paid enough attention.It is an important fault that the Fengqing road is not closed during the construction.

关 键 词：基坑工程 强度指标 高灵敏度黏土 水土合算 

分 类 号：TU47[建筑科学—结构工程]