| 软土浅埋暗挖隧道开挖面扰动特性及稳定性分析 |
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| 引用本文： | 吉小明.软土浅埋暗挖隧道开挖面扰动特性及稳定性分析[J].铁道科学与工程学报,2007,4(4):56-60. |
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| 作者姓名： | 吉小明 |
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| 作者单位： | 广东工业大学(大学城)建设学院,广东,广州,510006 |
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| 基金项目： | 广东省岩土工程重点学科建设项目 |
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| 摘 要： | 分析了浅埋暗挖地铁软土隧道开挖后围岩扰动带应力、变形特性、表征方法。利用特征曲线法分析了地层预加固机理。以国内常用的管棚预加固技术为例,提出了利用混合物理论中体积分数概念来分析加固效果的方法,并给出了应用实例。实例计算分析结果表明:采用管棚预加固技术加固隧道拱部可降低地表沉降,但对降低开挖面挤出效应效果有限。
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| 关 键 词： | 开挖面稳定性 开挖扰动带 管棚加固法 有限元分析 |
| 文章编号： | 1672-7029（2007）04-0056-05 |
| 修稿时间： | 2007-05-10 |
Face stability analysis and disturbed behavior of shallow bored tunnel in soils |
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| JI Xiao-ming.Face stability analysis and disturbed behavior of shallow bored tunnel in soils[J].Journal of Railway Science and Engineering,2007,4(4):56-60. |
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| Authors: | JI Xiao-ming |
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| Institution: | Faculty of Construction, Guangdong University of Technology, Guangzhou 510006, China |
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| Abstract: | The characterization of excavation disturbed zone(EDZ) was analysed,and methodology was proposed to depict mechanical and deformation behaviour of EDZ in soils and soft rock tunnelling.The improvement and reinforcement mechanics were studied by use of reaction curve method.A mathematical framework based on a homogenization technique and finite element formula were presented in according to concept of volume fractions,which allowed.considering the main design parameters in simulating effects of grouted pipe-roofing reinforcement.A numerical example was given.The results of the present study indicate that it is relatively significant reduction in ground settlements while reduction of tunnel face extrusion is not significant. |
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| Keywords: | face stability excavation disturbed zone grouted pipe-roofing method finite element analysis |
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