| 新建铁路隧道下穿既有铁路施工引起的地表沉降控制标准研究 |
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| 引用本文： | 朱正国,李兵兵,李文江,朱永全.新建铁路隧道下穿既有铁路施工引起的地表沉降控制标准研究[J].中国铁道科学,2011,32(5). |
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| 作者姓名： | 朱正国 李兵兵 李文江 朱永全 |
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| 作者单位： | 1. 石家庄铁道大学土木工程学院,河北石家庄,050043
2. 河北省电力勘测设计研究院,河北石家庄,050031 |
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| 基金项目： | 国家自然科学基金资助项目(50908153); 铁道部科技研究开发计划项目(2008G024-B) |
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| 摘 要： | 新建铁路隧道下穿既有铁路施工时引起地表沉降,这时对既有铁路运营安全的影响主要受控于轨道的前后高低差.采用ANSYS二维有限元方法,对新建铁路隧道下穿既有铁路工程建立数学模型,模拟计算不同最大等效应力、地质条件、隧道埋深、隧道结构形式等96种工况下的地表沉降量.并利用Peck公式回归分析得到96种工况下的沉降槽宽度系数.对模拟结果和回归结果进行数据分析,推导出沉降槽宽度系数与隧道埋深的关系式,以及地表最大沉降最与地层弹性模量、最大等效应力、隧道埋深的关系式.在此基础上,根据地表沉降曲线的正态分布规律、沉降槽宽度系数的数学意义和轨道的前后高低差管理值,推导得到新建铁路隧道下穿各等级既有铁路时的地表沉降控制标准.
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| 关 键 词： | 铁路隧道 下穿施工 地表沉降 控制标准 等效应力 |
Study on Ground Surface Settlement Control Standard Induced by Construction of New-Built Railway Tunnel Under-Passing Existing Railway |
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| ZHU Zhengguo,LI Bingbing,LI Wenjiang,ZHU Yongquan.Study on Ground Surface Settlement Control Standard Induced by Construction of New-Built Railway Tunnel Under-Passing Existing Railway[J].China Railway Science,2011,32(5). |
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| Authors: | ZHU Zhengguo LI Bingbing LI Wenjiang ZHU Yongquan |
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| Institution: | ZHU Zhengguo1,LI Bingbing2,LI Wenjiang1,ZHU Yongquan1(1.School of Civil Engineering,Shijiazhuang Tiedao University,Shijiazhuang Hebei 050043,China,2.Hebei Electric Power Design & Research institute,Shijiazhuang Hebei 050031,China) |
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| Abstract: | Ground surface settlement occurs when the new-built railway tunnel under-passing the existing railway is constructed.At this time,the influence on the operation safety of the existing railway is mainly controlled by track irregularities.ANSYS 2-D FEM was adopted to establish the mathematical model for the engineering of new-built railway tunnel under-passing the existing railway.By which ground surface settlement was simulated under 96 conditions of different maximum equivalent stress,geological condition,b... |
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| Keywords: | Railway tunnel Under-passing construction Ground surface settlement Control criterion Equivalent stress |
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