软土层厚度和基坑宽度对地铁车站基坑变形的影响
臧延伟
Influence of Soft Soil Layer Thickness and Foundation Pit Width on Metro Station Foundation Pit Deformation
ZANG Yanwei
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作者信息:中国电建集团华东勘测设计研究院有限公司，311122，杭州
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Affiliation:HydroChina Huadong Engineering Co., Ltd., 311122, Hangzhou, China
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关键词:
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Key words:
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DOI:10.16037/j.1007-869x.2022.09.021
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中图分类号/CLCN:TU433：U231.4
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栏目/Col:研究报告
摘要:
为研究软土层厚度和基坑宽度对地铁车站基坑变形的影响，基于Plaxis软件建立了地铁车站基坑变形的二维有限元模型。根据模拟计算结果，分析了不同地层厚度和基坑宽度对基坑围护结构水平变形、基坑隆起变形和基坑外地表沉降的影响。研究结果表明：围护结构变形曲线呈抛物线；基坑隆起变形呈“中间大，两边小”的单峰值形态；不同基坑宽度下，地表最大沉降与软土层厚度呈线性关系。
Abstracts:
To study the influence of soft soil layer thickness and foundation pit width on metro station foundation pit deformation, a 2D finite element model of metro station foundation pit deformation is built based on Plaxis software. According to the simulation calculation results, the influence of different stratum thickness and foundation pit widths on foundation pit enclosure structure horizontal deformation, foundation pit heave deformation and foundation pit external ground surface settlement is analyzed. Research results show that the enclosure structure deformation curve is parabolic; foundation pit heave deformation displays single peak value form of ‘middle large, side small’; at different foundation pit widths, the maximum ground surface settlement and soft soil layer thickness displays linear relation.
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