某深基坑SMW工法支护监测结果分析  

Analysis of field measured results of supporting of Wujing Road tunnel by use of SMW method

作　　者：鲍立楠 李竹[2] 王世杰[3] 

机构地区：[1]天津市城投建设有限公司,天津300010 [2]铁道第三勘察设计院集团有限公司,天津300142 [3]北京城建勘测设计研究院,北京100101

出　　处：《岩土工程学报》2008年第S1期489-492,共4页Chinese Journal of Geotechnical Engineering

基　　金：天津市科技创新专项资金项目(07FDZDSF01200)

摘　　要：对天津站交通枢纽工程五经路地道SMW工法支护的基坑进行了系统的观测,获得了墙体水平位移、坑底隆起、立柱隆沉、墙顶竖向位移及坑外土体水平位移的实测结果。基于这些实测结果分析了开挖与支撑安装的空间效应对围护结构内力与变形的影响。特别对与基坑开挖卸荷相关的变形特征进行了分析。基坑开挖卸荷和相应的坑底回弹可引起围护系统产生显著的竖向位移,并可对围护结构安全产生影响。Extensive field monitoring and measurement were carried out on supporting of Wujing Road tunnel at Tianjin Railway Station by use of the SMW method.Field measured results of horizontal displacement of SMW walls,rebound of pit bottom,vertical displacement of soldier beams and the SMW walls along with horizontal displacement of soil behind the SMW walls were obtained.Based on the analysis of these data,the spacial effect of excavation and installation of struts on the internal forces and deformation of retaining system was studied.The deformation characteristics related to unloading due to removal of soil was specially analyzed.Significant vertical displacement of supporting system could be caused by rebound of pit bottom due to excavation and influence the safety of retaining structure.

关 键 词：SMW工法 基坑 现场观测 卸荷 隆起 

分 类 号：TU753[建筑科学—建筑技术科学]