2012年4月下 施工技术 第41卷第363期 CONSTRUCTION TECHNOLOGY 67 基坑周围深层土体沉降预测研究 尹盛斌1，丁红岩2 (1.汤臣（中国）有限公司，上海200122：2.天津大学建筑工程学院.天津300072) 【摘要】工程经验表明：任意的围护结构变形形式均可近似利用正向转动、反向转动及挠曲等3种基本变形模式进 行拟合，且通过对基坑开挖过程的有限元数值模拟可知，当围护结构发生上述3种基本变形模式时，坑外深层土体 沉降存在较为明显的分布规律.利用3种基本变形模式对围护结构的侧移曲线进行拟合，求得所对应的最大位移 值，然后根据3种基本模式所对应的坑外深层土体沉降曲线分布，求得每一基本模式所对应的坑外深层土体沉降 分量，并进行叠加，从而求得坑外深层任意点的沉降值. [美键词]地下工程：基坑：沉降：数值分析：基本变形模式 【中图分类号]TU443 [文献标识码]A [文章编号]1002-8498(2012)08-0067-06 Research on Prediction of Sub-surface Settlement to Foundation Excavation Yin Shengbin' Ding Hongyan2 (1.Tomson Group in Shanghai Shanghai 200122.China: 2.4e可f Civil Engineering 7 ianjin University Tiangjin300072 China) Abstract:The project experience shows that arbitrary displacement pattern of the retaining wall can be fitted using the three basic deformation modes which are the forward rotation reverse rotation and deflection.The numerical simulation of the foundation excavation shows that for the three basic deformation modes the dislribution of the sub-surface settlement of the soil can be fitted by experienee curves.Esing the three basic deformation modes arbitrary displacement pattern of the retaining wall can be fitted and the maximum displacement value for each basic deformation mode also can be obtained. Based on the experience curve calculated by the trumerical analysis method the corresponding ponent of the sub-surface settlement for each basic deformation mode can be calculated.Then adding the three ponents of the sub-surface settlem...
基坑周围深层土体沉降预测研究.pdf
