水泥土重力式挡墙在基坑围护中的变形特性研究  

Study on Deformation Characteristics of Gravity Retaining Wall

作　　者：李俊俊[1,2] 汪中林[1] 程成[1] 肖桃李[1] 

机构地区：[1]长江大学城市建设学院,湖北荆州434023 [2]武汉市汉阳区建筑管理站,湖北武汉430050

出　　处：《长江大学学报（自然科学版）》2017年第1期67-70,共4页Journal of Yangtze University(Natural Science Edition)

基　　金：湖北省自然科学基金项目(2015CFB667);湖北省教育厅科学技术研究项目(Q20141307)

摘　　要：重力式挡墙支护结构是以自身重力来维持挡土墙在土压力作用下的稳定,是目前国内比较常见的一种支护形式。为研究水泥土重力式挡墙在基坑围护中的变形特性,针对湖北某水泥土重力式挡墙支护结构基坑工程,通过现场取土样进行室内研究,优化设计方案,并结合施工现场监测技术,对监测数据进行研究。重点分析基坑支护结构位移及地表沉降的变化情况,探讨基坑变形规律。结果表明,各项监测数据均在设计预警值内;重力式挡墙支护结构对临近建筑物及道路沉降具有良好的控制作用;室内试验研究能为基坑支护设计进行优化;监测数据可为基坑开挖提供参考与指导,有效保证基坑施工安全。该研究结果可为类似基坑工程提供参考与指导。Gravity retaining wall is a kind of support structure which is based on its own gravity to maintain the stability of retaining wall under earth pressure.In order to study the deformation characteristics of cement-soil gravity retaining wall in foundation pit,for the foundation pit engineering of cement-soil gravity retaining wall supporting structure in Hubei,the soil samples in the working site are researched for optimizing the design scheme,and combined with monitoring technology in construction site,the monitoring data are studied,the change of deep horizontal displacement and vertical displacement on the top of support structure and surface subsidence is emphatically analyzed,the deformation law of foundation pit is discussed.The results show that the monitoring data are both lower than the warning value,the supporting structure of gravity retaining wall has a good control on the settlement of adjacent buildings and roads,the indoor test research can optimize the design of foundation pit support,monitoring data provide reference and guidance for the excavation of the foundation pit,it effectively ensures the safety of foundation pit construction.The research results can provide reference for similar projects.

关 键 词：基坑工程 重力式挡墙 监测 变形 

分 类 号：TU170[建筑科学—建筑理论]