复合土钉支护变形特性的实测分析  

The analysis of comosite soil nailing support in deformation characteristics

作　　者：张庆山[1] 胡敏云[1] 夏玲涛[1] 

机构地区：[1]浙江工业大学建筑工程学院,浙江杭州310032

出　　处：《浙江工业大学学报》2009年第6期689-693,698,共6页Journal of Zhejiang University of Technology

摘　　要：结合杭州市某软土基坑复合土钉支护工程的施工过程,现场变形监测记录和杭州软土地基的特性,分析和研究复合土钉墙支护的水平位移与沉降规律,得出水平位移随深度呈抛物线形式分布,最大水平位移在基坑中下部;基坑周边地表沉降都很小.并且分析了主要影响因素如施工顺序、支护形式和周边环境等,得出结论:基坑开挖应该先开挖周围无管线或建筑物的区域;复合土钉支护比纯水泥搅拌桩支护能更好的控制基坑变形;周边环境的影响很大,对靠近建筑物与交通主干道的基坑要加强支护措施,严格控制基坑变形.Based on deformation monitoring records of an excavation in soft soil in Hangzhou,which was supported by composite soil nailed wall,the deformation development of excavation in soft soil was analyzed,the result indicated that the horizontal displacement with depth forms a parabolic distribution,the maximum horizontal displacement was at the lower part of the foundation;surface settlement around foundation pit was small.And the main influencing factors such as the construction sequence,supporting forms, surrounding environment were analyzed,concluding that excavation should be conducted firstly at the position where was no digging around pipelines or struetures; composite soil nailing was better than pure cement mixing pile to control deformation; if the foundation pit was near to the heavily traffic road and building, it should be strengthened to strictly control the deformation.

关 键 词：软粘土 复合土钉支护 基坑工程 现场监测 

分 类 号：TU196[建筑科学—建筑理论]