| 崇文门站施工允许地表沉降及三维有限元模拟分析 |
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| 引用本文： | 朱正国,乔春生,赖永标.崇文门站施工允许地表沉降及三维有限元模拟分析[J].工程地质学报(英文版),2006,14(2):257-262. |
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| 作者姓名： | 朱正国 乔春生 赖永标 |
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| 作者单位： | 北京交通大学土木建筑工程学院,北京100044 |
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| 摘 要： | 建设中的北京地铁五号线崇文门站下穿既有地铁一号线区间隧道,为保证既有地下铁道正常运营和地下结构的安全,需严格控制新建车站施工引起的地层位移。结合新建车站暗挖施工及既有线地铁的实际情况,分析和计算穿越既有隧道施工地表允许沉降值。为了控制地表沉降,确保施工安全,拟采用小刚度管棚或大刚度顶管作超前预支护,用3D-S igm a三维有限元软件进行施工效应的计算模拟,掌握大管棚和顶管预支护洞室的力学效应,预测车站施工引起既有隧道的沉降量。最后分析比较两种预支护的支护效果,为选择合理的预支护方案提供参考。
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| 关 键 词： | 顶管 预支护 三维有限元 地表沉降 |
| 文章编号： | 1004-9665/2006/14（02）-0257-06 |
| 收稿时间： | 2005-05-08 |
| 修稿时间： | 2005-07-14 |
ALLOWABLE GROUND SUBSIDENCE BY CONSTRUCTION OF THE CHONGWENMEN STATION AND ITS SIMULATION WITH THREE-DIMENSIONAL FINITE ELEMENT METHOD |
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| ZHU Zhengguo,QIAO Chunsheng,LAI Yongbiao.ALLOWABLE GROUND SUBSIDENCE BY CONSTRUCTION OF THE CHONGWENMEN STATION AND ITS SIMULATION WITH THREE-DIMENSIONAL FINITE ELEMENT METHOD[J].Journal of Engineering Geology,2006,14(2):257-262. |
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| Authors: | ZHU Zhengguo QIAO Chunsheng LAI Yongbiao |
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| Institution: | School of Civil Engineering and Architecture,Beijing Jiaotong University,Beijing 100044 |
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| Abstract: | The Chongwenmen station of Beijing metro line No.5 goes beneath the existing subway line No.1.In order to guarantee the normal operation of the existing metro line and the safety of underground construction,the stratum displacement caused by construction must be well controlled.This paper presents the analysis of allowable ground subsidence during construction the Chongwenmen station project.In order to control the ground subsidence and guarantee the safety of construction,big pipe umbrella of small rigidity or pipejacking of greater rigidity is used as pre-support.In this paper,three-dimensional finite element software,3D-Sigma,is used to simulate effects of the construction and estimate the subsidence of the interval tunnel caused by the construction.At the end,effects of big pipe umbrella and pipejacking pre-support are analyzed and compared,which can provide guidelines for selection of appropriate presupport scheme. |
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| Keywords: | Pipejacking Pre-support Three-dimensional finite element Ground subsidence |
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