Calculation of lateral displacement of soils under diaphragm wall in large and deep excavation
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摘要: 大面积深基坑施工过程中，基坑外土体可通过围护墙下向坑内移动，这一移动趋势与着基坑施工对周边环境的影响密切相关。通过建立围护墙下土体位移的模型，推导了与基坑面积、基坑开挖深度、围护墙插入深度及土性相关的围护墙下土体位移的计算方法。并与工程实测数据进行了比较分析。进而讨论了影响围护墙下土体位移的各因素的作用以及因素之间的相互关联。Abstract: During the construction of large and deep foundation, the soils may move into the excavation beneath the diaphragm wall. This phenomenon closely relates with the influence on the surroundings. The soils beneath the diaphragm wall are modeled, and a method is deduced for calculating the soil displacement considering the excavation area, excavation depth, length of diaphragm wall and soil properties. A comparison between the analytical results and the monitoring data as well as the parameter studies on the soil displacements are then carried out.
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Keywords:
- large and deep excavation /
- excavation area /
- excavation depth /
- lateral displacement
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[1] 刘国彬, 王卫东. 基坑工程手册[M]. 2版. 北京: 中国建筑工业出版社, 2009. (LIU Guo-bin, WANG Wei-dong. Excavation engineering manual[M]. 2nd ed. Beijing: China Architecture and Building Press, 2009. (in Chinese)) [2] 高大钊. 土力学与基础工程[M]. 北京: 中国建筑工业出版社, 1998. (GAO Da-zhao. Soil mechanics and foundation engineering[M]. Beijing: China Architecture and Building Press, 1998. (in Chinese))（本文责编 李运辉）
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