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| Long-term stability analysis and deformation prediction of soft soil foundation pit in Taihu Tunnel |
Ao ZHOU1,2( ),Bin WANG2,*(),Jie-tao LI2,Xin ZHOU3,Wen-jun XIA3 |
1. School of Civil and Environmental Engineering, Hubei University of Technology, Wuhan 430068, China
2. State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China
3. Jiangsu Provincial Transportation Engineering and Construction Bureau, Nanjing 210004, China |
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Abstract An intelligent inversion system based on support vector machine (SVM) was established, and creep tests of soft soil were conducted in laboratory under the background of a large foundation pit project of Taihu tunnel. An innovative analysis method was proposed by combining the intelligent inversion and creep tests. The basic physical and mechanical parameters and creep parameters of relevant soil layers were determined combined with the monitoring data. The feasibility of the method in long-term stability analysis and deformation prediction of soft soil foundation pit under overloading was verified by analyzing the deformation at the site of soft soil foundation pit under overloading. The method was applied to the optimization design under overloading of Taihu tunnel, and good results were obtained.
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Received: 19 May 2021
Published: 24 April 2022
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| Fund: 国家自然科学基金资助项目（51709258，51979270）；中国科学院“百人计划”资助项目；江苏省交通工程建设局科技资助项目（212019YH111205） |
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Corresponding Authors:
Bin WANG
E-mail: 237696565@qq.com;bwang@whrsm.ac.cn
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太湖隧道软土基坑长期稳定性分析与变形预测
以太湖隧道某大型基坑工程为背景，构建基于支持向量机方法的智能反演系统，开展室内软土蠕变实验，提出结合智能反演和蠕变实验的分析方法. 结合现场监测数据，综合确定相关土层的基本物理力学参数及蠕变相关参数. 结合现场超载作用下软土基坑的变形进行分析，验证了该方法在进行软土基坑超载作用下长期稳定性分析及变形预测中的可适用性. 将该方法应用于太湖隧道的超载优化设计，取得了良好的效果.
关键词：
软土,
超载,
时效变形,
稳定性
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