[1]王志超,甘露,赖金星,等.盾构下穿铁路路基钢轨变形及路基沉降分析[J].深圳大学学报理工版,2018,35(4):389-397.[doi:10.3724/SP.J.1249.2018.04389]
　WANG Zhichao,GAN Lu,LAI Jinxing,et al.Analysis of track deformation and subgrade settlement of shield tunnel construction crossing existing railway[J].Journal of Shenzhen University Science and Engineering,2018,35(4):389-397.[doi:10.3724/SP.J.1249.2018.04389]
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盾构下穿铁路路基钢轨变形及路基沉降分析()
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《深圳大学学报理工版》[ISSN:1000-2618/CN:44-1401/N]

卷:
第35卷
期数:
2018年第4期
页码:
389-397
栏目:
土木建筑工程
出版日期:
2018-07-10

文章信息/Info

Title:
Analysis of track deformation and subgrade settlement of shield tunnel construction crossing existing railway
作者:
王志超; 甘露; 赖金星; 贺思悦; 王修领
长安大学公路学院，陕西西安 710064
Author(s):
WANG Zhichao;  GAN Lu;  LAI Jinxing;  HE Siyue;  and WANG Xiuling
School of Highway, Chang’an University, Xi’an, 710064, Shaanxi Province, P.R.China
关键词:
隧道工程; 地铁盾构; 铁路路基; 深孔注浆; 钢轨变形; 路基沉降; 有限元
Keywords:
tunnel engineering;  metro;  railway subgrade;  deep hole grouting;  rail deformation;  subgrade settlement;  finite element
分类号:
U 455
DOI:
10.3724/SP.J.1249.2018.04389
文献标志码:
A
摘要:
为研究地铁盾构下穿铁路路基过程中钢轨变形与路基沉降的变化规律，分析路基深孔注浆的加固效果，基于天津地铁7号线盾构施工下穿某铁路工程，采用有限元软件Midas-NX对盾构下穿既有铁路过程进行动态模拟，分析了盾构穿越过程中有无深孔注浆时钢轨的水平与竖直变形以及盾构施工完成后铁路路基竖向位移的分布规律. 结果表明，钢轨的横向变形随施工过程经历了两次先增大后减小的过程，并沿轨身呈对称状分布；钢轨变形在盾构两次到达铁路正下方时达到极值，沿轨身沉降槽中心随施工步逐渐向工程中心移动；土层经深孔注浆加固后，钢轨的横向、竖向位移以及路基沉降分别减小了85.1%、76.7%和74.1%，有利于保证铁路在地铁盾构过程中的安全性.
Abstract:
To study the changes of track deformation and subgrade settlement of the shield tunnels across the existing railway, and analysis of reinforcement effect of deep hole grouting in subgrade based on the shield construction of Tianjin Metro Line 7, the dynamic simulation using the finite element software Midas-NX was carried out, the horizontal and vertical deformations of the rail and the distribution of the vertical displacement of the railway subgrade after the completion of the shield construction were analyzed. The results showed the transverse deformation of the rail underwent two times processes of first enlargement through the construction, and there was a symmetrical distribution along the rail body; the deformation of the rail reached the extreme value when the shield reached the bottom of the railway two times, and the center of the settlement trough along the rail gradually moved to the engineering center with the construction step; after reinforced by deep hole grouting, the lateral and vertical displacement of the rail and the settlement of the roadbed reduced by 85.1%, 76.7% and 74.1%, respectively, which was beneficial to ensure the safety of the railway in the subway shield process.

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更新日期/Last Update: 2018-06-20