| 在裂隙岩体中开挖隧道的双场耦合蠕变分析 |
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| 引用本文： | 刘文剑,吴湘滨,张慧.在裂隙岩体中开挖隧道的双场耦合蠕变分析[J].岩土力学,2008,29(11):3011-3016. |
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| 作者姓名： | 刘文剑 吴湘滨 张慧 |
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| 作者单位： | 中南大学,地学与环境工程学院,长沙,410083 |
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| 基金项目： | 交通部西部交通建设科技项目
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| 摘 要： | 运用黏弹性断裂、蠕变理论,对裂隙围岩在开挖时的蠕变现象进行分析,建立了隧道开挖的双场耦合蠕变模型.运用Laplace转换,推导出围岩的径向位移函数表达式,分析了应力卸荷、渗流力的作用以及节理裂隙分布对径向位移的影响.同时,利用FLAC中的FISH语言编写了FISH函数,将计算隧道模型的数值及解析结果与实测数据进行了比较.计算结果表明,径向最大位移变化量并不在主应力最大方向,也不在隧道顶端,而是受地应力分布、渗透水压和节理分布综合作用形成偏压位移,其结果可为隧道支护提供借鉴.
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| 关 键 词： | 隧道卸荷 双场耦合蠕变分析 径向位移函数 FLAC模拟 |
| 收稿时间： | 2007-02-28 |
Analysis of two-field coupling creep of tunnel excavation in rich fracture rock |
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| LIU Wen-jian,WU Xiang-bin,ZHANG Hui.Analysis of two-field coupling creep of tunnel excavation in rich fracture rock[J].Rock and Soil Mechanics,2008,29(11):3011-3016. |
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| Authors: | LIU Wen-jian WU Xiang-bin ZHANG Hui |
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| Institution: | School of Geoscience and Environmental Engineering, Central South University, Changsha 410083, China |
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| Abstract: | Due to the change of stress field and the seepage field caused by tunnel excavation, unloading deformation is extremely complicated mechanical process in rich fracture rock. Viscidity elastic fracture and creeping theory are adopted, two-field coupling creep model of tunnel excavation in rich fracture rock is established; and Laplace transformation is applied to educe the expression of radial deformation function, in order to illuminates the influence of stress unloading distributions, seepage force and cre... |
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| Keywords: | tunnel unloading analysis of two-field coupling creep radial deformation function FLAC simulation |
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