| 不同埋深及偏压角度条件下隧道力学特性 |
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| 引用本文： | 罗晶,彭立敏,施成华,黄生文,高林,雷明锋. 不同埋深及偏压角度条件下隧道力学特性[J]. 铁道科学与工程学报, 2012, 9(4): 75-78 |
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| 作者姓名： | 罗晶 彭立敏 施成华 黄生文 高林 雷明锋 |
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| 作者单位： | 1. 中南大学土木工程学院,湖南长沙410075;启东市政府投资项目工程建设中心,江苏启东226200
2. 中南大学土木工程学院,湖南长沙,410075 |
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| 摘 要： | 运用MIDAS有限元程序建立浅埋偏压隧道数值计算模型,探讨了隧道偏压角度和埋深对洞室稳定性的影响程度及衬砌结构受力变化规律。研究结果表明:随着偏压角度的增加,隧道围岩各特征点抗剪安全系数整体下降,隧道洞室的稳定性逐渐降低;随隧道拱顶埋深的增大,隧道结构内力偏压特征逐渐减弱。
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| 关 键 词： | 浅埋偏压隧道 隧道洞口 数值分析 位移 应力 |
Stress characteristics of tunnel under different buried depths and bias angle conditions |
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| LUO Jing , PENG Li-min , SHI Cheng-hua , HUANG Sheng-wen , GAO Lin , LEI Ming-feng. Stress characteristics of tunnel under different buried depths and bias angle conditions[J]. Journal of Railway Science and Engineering, 2012, 9(4): 75-78 |
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| Authors: | LUO Jing PENG Li-min SHI Cheng-hua HUANG Sheng-wen GAO Lin LEI Ming-feng |
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| Affiliation: | 1(1.School of Civil Engineering,Central South University,Changsha 410075,China; 2.Qidong Municipal Construction Centre,Qidong 226200,China) |
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| Abstract: | The influence of cavern stability and stress variation of lining structure caused by buried depth and bias angle were discussed according to the numerical analysis model of shallow-buried bias tunnel established by MIDAS finite element program.A series results were obtained.The shear safety factors of tunnel linning feature points were declined,and the stability of the cavern was reduced gradually with the increase of the unsymmetrical loading angle.Meanwhile,the unsymmetrical loading characteristics of tunnel structural internal force are decline gradually with the increase of the depth of tunnel vault. |
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| Keywords: | shallow tunnel with unsymmetrical loadings tunnel portal section numerical analysis displacement stress |
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