| 陈文昭,高全臣,江俊设.软土基坑SMW工法墙墙顶位移与嵌固比关系模拟试验研究[J].南华大学学报(自然科学版),2011,25(2):89~94.[CHEN Wen-zhao1,2,GAO Quan-chen1,JIANG Jun-she2.Simulation Test Study on the Relation of the Displacementon the Top of SMW With the Embedded-ratio[J].Journal of University of South China(Science and Technology),2011,25(2):89~94.] |
| 软土基坑SMW工法墙墙顶位移与嵌固比关系模拟试验研究 |
| Simulation Test Study on the Relation of the Displacementon the Top of SMW With the Embedded-ratio |
| 投稿时间：2011-03-04 |
| DOI： |
| 中文关键词: 模型试验 数值模拟 墙顶位移 嵌固比 拟合曲线 指数模型 预测预报 |
| 英文关键词:model test numerical simulation the displacement on the top of wall embedded-ratio fitting curve the model of exponential function,fo |
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| 中文摘要: |
| 基于相似理论设计了SMW工法支护的软土深基坑支护开挖试验模型，由模型试验测得了各级开挖稳定后的SMW工法墙墙顶位移；在模型试验基础上，采用大型非线性有限元软件ABAQUS建立了特征墙段的三维有限元数值分析模型，由数值分析也获得了各级开挖工况下墙顶位移.比较了基坑模型试验及其数值模拟分析结果，并采用指数模型拟合了SMW工法墙墙顶位移与嵌固比关系曲线.结果表明：采用指数模型拟合SMW工法墙墙顶位移与嵌固比关系可取得良好的拟合效果.工程施工中，可采用指数模型预测预报SMW工法墙随基坑开挖产生的墙顶水平位移.施工过程中，加强墙顶位移监测，绘制墙顶位移与嵌固比关系曲线，将预测位移值与实测值进行分析对比，可以了解支护结构实际所处的工作状态及变形阶段，从而可以预防工程事故发生. |
| 英文摘要: |
| Based on the theory of Similarity,the model of trial pit supported by SMW and the displacement-values on the top of wall after excavation were measured.Based on the model test,three-dimensional finite element analysis model of characteristic-wall was made by the large-scale non-linear finite element software ABAQUS and the displacements on the top of SMW at each excavation-step was obtained.The results of the pit model test and numerical simulation analysis were compared and the relation curve of the displacement with embedded-ratio was fitted by means of the model of exponential function.It was shown that good fitting effect could be obtained when the relation curve of the displacement with embedded-ratio was fitted by means of the model of exponential function.In engineering construction,the displacement-values on the top of wall as the excavation could be forecasted by the model of exponential function.To prevent the engineering accidents happen,the displacement-values on the top of wall should be monitored and the relation curve of the displacement with embedded-ratio should be drawn.By analysing and comparing the measured-values with its forecast-values,one can find out the actual working state of the supporting system and assess its stage of deformation and thereby prevent the happening of accident. |
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