基坑开挖对邻近地铁隧道管片变形的影响规律
散骞骞1王长丹2,3周瑜亮2,3
Influence Pattern of Foundation Pit Exca-vation on Adjacent Metro Tunnel Segment Deformation
SAN QianqianWANG ChangdanZHOU Yuliang
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作者信息:1.1.中铁第四勘察设计院集团有限公司， 430061， 武汉;
2.2.同济大学道路与交通工程教育部重点实验室, 201804, 上海;
3.3.同济大学上海市轨道交通结构耐久与系统安全重点实验室, 201804, 上海
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Affiliation:China Railway Siyuan Survey and Design Group Co., Ltd., 430061, Wuhan, China
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关键词:
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Key words:
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DOI:10.16037/j.1007-869x.2022.08.027
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中图分类号/CLCN:U456.3+1
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栏目/Col:研究报告
摘要:
采用Plaxis三维有限元分析软件，建立有限元模型，模拟基坑开挖施工过程，研究基坑与邻近地铁隧道距离、基坑开挖深度及盾构隧道管片厚度等参数变化对隧道管片收敛变形的影响。由已知工程的实测数据验证了模型的有效性。研究结果表明：基坑与隧道距离的影响最大，管片厚度的影响次之，基坑开挖深度的影响最小。
Abstracts:
By adopting Plaxis 3D finite element analytical software, a finite element model is established to simulate foundation pit excavation construction process. The influence of parameters including the distance between foundation pit and the tunnel, the foundation pit excavation depth, and shield tunnel segment thickness on tunnel segment convergence deformation is studied. The field measured data of existing projects has verified the effectiveness of the model. Research results show that the distance between foundation pit and tunnel has the biggest influence, segment thickness is second to it, and the foundation pit excavation depth the least.
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