Practical calculation method of arbitrary ground surface settlement outside basement considering the whole process of excavation

被引：0
|
作者：
Cheng K. [1 ,2 ,3 ]
Xu R. [2 ,3 ]
Ying H. [2 ,4 ]
Li B. [5 ]
Zhang J. [5 ]
机构：
[1] China Railway 11th Bureau Group Co. Ltd., Wuhan
[2] Research Center of Coastal and Urban Geotechnical Engineering, Zhejiang University, Hangzhou
[3] Engineering Research Center of Urban Underground Development of Zhejiang Province, Hangzhou
[4] Institute of Geotechnical Engineering Science, Hohai University, Nanjing
[5] Zhejiang Province Architectural Design and Research Institute, Hangzhou
来源：
Zhongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Central South University (Science and Technology) | 2023年 / 54卷 / 05期
基金：
中国国家自然科学基金;
关键词：
longitudinal settlement; metro basement; standard model; transverse settlement; whole process excavation;
D O I：
10.11817/j.issn.1672-7207.2023.05.019
中图分类号：
学科分类号：
摘要：
Based on the collected 16 cases of Hangzhou metro basement, the relative "standardized model" of basement was firstly established, including the physical parameters of basement, excavation process and soil distribution, and the three-dimensional finite element modeling analysis was carried out. By comparing the ground surface settlement obtained from the numerical model with the measured data as well as the existing solutions from the published literature, the accuracy of the numerical model was verified. Subsequently, a practical calculation method considering the dynamic excavation was proposed to predict the transverse and longitudinal ground surface settlement outside excavation. Finally, the deformation characteristics of ground surface settlement during each stage could be furthely analyzed. The results show that when the excavation depth exceeds 7 m, the transverse ground surface settlement outside the excavation is transforms from "cantilever" to "three-stage" broken line distribution. With the increase of excavation depth, the transverse ground surface settlement and its transverse distance to excavation increase significantly. The proposed model and method are both accurate. © 2023 Central South University of Technology. All rights reserved.
引用
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页码：1851 / 1862
页数：11
相关论文
共 31 条
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