Numerical Analysis of Settlement of Soft Ground Induced by Subway Station Construction Load

刘耀凯; 王绍君; 张威

doi:10.13409/j.cnki.jdpme.2013.s1.002

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Numerical Analysis of Settlement of Soft Ground Induced by Subway Station Construction Load

更新时间：2025-12-11

- Numerical Analysis of Settlement of Soft Ground Induced by Subway Station Construction Load
- Vol. 33, Issue S1, Pages: 20-24(2013)
- 作者机构：
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- DOI：10.13409/j.cnki.jdpme.2013.s1.002
  CLC： 231;TU433
- Published：2013
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[1]刘耀凯,王绍君,张威.地铁站施工荷载对软土地表沉降的数值分析[J].防灾减灾工程学报,2013,33(S1):20-24.

刘耀凯, 王绍君, 张威. Numerical Analysis of Settlement of Soft Ground Induced by Subway Station Construction Load[J]. 2013, 33(S1): 20-24.
[1]刘耀凯,王绍君,张威.地铁站施工荷载对软土地表沉降的数值分析[J].防灾减灾工程学报,2013,33(S1):20-24. DOI： 10.13409/j.cnki.jdpme.2013.s1.002.

刘耀凯, 王绍君, 张威. Numerical Analysis of Settlement of Soft Ground Induced by Subway Station Construction Load[J]. 2013, 33(S1): 20-24. DOI： 10.13409/j.cnki.jdpme.2013.s1.002.

摘要

目前我国软土地区城市地下空间迅速发展

高层建筑的深基坑、地下轨道交通地铁车站及隧道区间的建设带来了一系列岩土工程问题。针对目前施工中的问题

本文结合宁波软土地区某地铁站深基坑工程

揭示随着地铁深基坑分层降水、分步开挖和分步支撑的施工步序

触发地面沉降的机理。采用有限元软件FLAC建立了考虑施工步序的宁波某地铁车站深基坑计算模型

计算分析不同施工步序下的地表沉降。研究结果表明

不同施工步序对地表沉降的影响作用不同

其中降水的影响作用随着开挖的加深而增强;在深基坑的开挖过程中

基坑外侧20m范围内的土体沉降急剧变化

工程技术人员比较重视

而2030m范围内的土体沉降差异较大

也易引发工程事故

对此不容忽视;控制基坑外侧土体的水平位移能够有效减小地表沉降

保护周边建筑和市政管线。

Abstract

At present

the development of urban underground space in soft soil area is prosperous in our country.The construction of deep foundations pits of high-rise buildings

subway stations and the tunnel brings a series of geotechnical engineering problems.Aiming at the problems in the construction

combining with a deep excavation subway station in soft soil area of Ningbo

considering construction steps

the land subsidence mechanism related to drawdown steps

excavation steps and support steps is studied.Computational model of deep pit of Ningbo subway station including construction steps is established using FLAC.Surface subsidence under different constructi

on steps is obtained.Research shows that the construction process has large influence on surface subsidence.The effect of drawdown enhances with the deepening of pit.The ground in the range of 20mout of the foundation pit subsides sharply in the process of deep foundation pit excavation

which should be taken more attention.The settlement difference of surface in the scope of 20

0mis large and easily causes engineering accident

which should not be ignored. Surface settlement can be effectively reduced by controlling the lateral horizontal displacement of soil in foundation pit

which can protect the surrounding buildings and municipal pipelines.

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references

深基坑变形控制研究进展及在宁波地区的实践 [J]. 郑荣跃,曹茜茜,刘干斌,刘晓虎. 工程力学 . 2011(S2)

浅埋暗挖隧道施工性态的数值模拟与分析 [J]. 王绍君,刘宗仁,陶夏新. 土木工程学报 . 2007(06)

复杂条件下城市地铁隧道施工地表沉降研究 [D]. 吴波. 西南交通大学 2003

Displacement control in tunnels excavated by the NATM: 3-D numerical simulations [J] . Márcio Muniz de Farias,álvaro Henrique Moraes Júnior,André Pacheco de Assis. Tunnelling and Underground Space Technology incorporating Trenchless Technology Research . 2003 (3)

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