| 崇文门站顶管预支护方案三维有限元分析 |
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| 引用本文： | 朱正国,冯卫星,孙明磊. 崇文门站顶管预支护方案三维有限元分析[J]. 北京交通大学学报(自然科学版), 2006, 30(1): 47-50 |
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| 作者姓名： | 朱正国 冯卫星 孙明磊 |
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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;石家庄铁道学院土木工程分院,河北,石家庄,050043 |
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| 摘 要： | 北京地铁五号线崇文门站,下穿既有地铁一号线区间隧道,车站顶板与区间隧道底板间距2.858 m.为了严格控制既有环线区间隧道的沉降,确保环线地铁运营安全,首次采用了顶管作超前预支护.考虑不同的顶管直径以及周围地层的弹性模量对地表、拱顶和既有线的变形影响,用3D-Sigma三维有限元软件进行施工效应的计算模拟,掌握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.计算表明用大刚度的顶管作超前预支护,可以满足既有线地铁运营和城市地表建筑物变形控制要求.
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| 关 键 词： | 顶管 预支护 三维有限元 施工效应 |
| 文章编号： | 1673-0291(2006)01-0047-04 |
| 收稿时间： | 2005-01-19 |
| 修稿时间： | 2005-01-19 |
Analysis of Scheme on Technical of Pipe-Jacking Pre-Support in Chongwenmen Subway Station with Three-Dimensional Finite Element |
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| ZHU Zheng-guo,FENG Wei-xing,SUN Ming-lei. Analysis of Scheme on Technical of Pipe-Jacking Pre-Support in Chongwenmen Subway Station with Three-Dimensional Finite Element[J]. JOURNAL OF BEIJING JIAOTONG UNIVERSITY, 2006, 30(1): 47-50 |
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| Authors: | ZHU Zheng-guo FENG Wei-xing SUN Ming-lei |
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| Affiliation: | 1. School of Civil Engineering and Architecture, Beijing Jiaotong University, Beijing 100044, China; 2. School of Civil Engineering of the Shijiazhuang Railway Institute, Shijiazhuang, Hebei 050043, China |
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| Abstract: | Chongwenmen Station of No. 5 line of Beijing subway goes beneath the existing No. 1 line of the interval tunnel of Beijing subway. The distance between the roof of the station and the bottom board of the interval tunnel is 2. 858 m. In order to control the subsidence of the interval tunnel and guarantee the safety of operation strictly, pipe-jacking is used as pre-support for the first time. Threedimensional finite element software, 3D-Sigma, is used to calculate and simulate the construction effect. The mechanical effect of the hole room with pipe-jacking pre support is grasped well in this paper. In addition, the subsidence of the interval tunnel because of the construction of the station is forecasted. The computation indicated that pipe-jacking being used as pre-support can satisfy the request of distortion controlling for existing subways and city buildings. |
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| Keywords: | pipe-jacking pre-support three-dimensional finite element construction effect |
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