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| 地铁隧道施工引起地层位移规律的探讨 | |
| 引用本文： | 韩煊,李宁.地铁隧道施工引起地层位移规律的探讨[J].岩土力学,2007,28(3):609-613. |
| 作者姓名： | 韩煊 李宁 |
| 作者单位： | 1. 西安理工大学,岩土工程研究所,西安,710048;北京市勘察设计研究院,北京,100038 2. 西安理工大学,岩土工程研究所,西安,710048 3. 英国帝国理工学院,英国,伦敦,SW7 2AZ |
| 基金项目： | 北京市人事局北京市留学人员科技活动择优资助项目;北京市科委科研项目 |
| 摘 要： | 目前对城市隧道开挖所引起的地表以下地层的位移规律的认识还很不充分，长期以来只有定性地认识。英国学者Mair等人（1993年）根据在黏土中的有限实测资料，基于预测地表位移的Peck公式，考虑了沉降槽宽度随深度变化，从而提出了地表以下的位移计算公式。他们的研究成果被广泛引用，但是由于其仅适用于黏性土，且假定地表处沉降槽宽度参数为0.5，因此在应用上受到很大的限制。在Mair公式的基础上，着重讨论了沉降槽宽度参数随地层深度的变化趋势，并提出了修正计算公式，不仅可以考虑地表沉降槽宽度参数与0.5相差较大的情况，还适用于砂类土地层，因此比Mair公式具有更广泛的适用性。 |
| 关 键 词： | 隧道 地铁 地层位移 变形预测 沉降槽 沉降槽宽度参数 |
| 文章编号： | 1000-7598-（2007）03-0609-05 |
| 收稿时间： | 2006-02-23 |
| 修稿时间： | 2006-02-23 |
Study on subsurface ground movement caused by urban tunneling |
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| HAN Xuan,LI Ning,Jamie R.STANDING.Study on subsurface ground movement caused by urban tunneling[J].Rock and Soil Mechanics,2007,28(3):609-613. | |
| Authors: | HAN Xuan LI Ning Jamie RSTANDING |
| Institution: | 1. Geotechnical Research Institute, Xi’an University of Technology, Xi’an 710048, China; 2. Beijing Geotechnical Institute, Beijing 100038, China; 3. Imperial College of Science, Technology and Medicine, London, UK, SW7 2AZ |
| Abstract: | The research on subsurface ground movement has a great importance in terms of the evaluation of the risks to the subsurface structures and pipelines influenced by tunneling. However, this is a topic about which is little known. According to the research by Mair et al (1993) who analyzed the subsurface data from various tunneling projects and centrifuge tests in clays, subsurface settlement profiles could also be reasonably approximated by the form of a Gaussian distribution in the same way as surface settlement profiles. Their equation based on this observation is widely used. However, a fixed value for surface settlement trough-width parameters K is used for clay in the equation, which causes considerable errors for different geological conditions. Also, because of the data they used， Mair equation is only applicable to clays. Based on field data analysis, a normalized ratio ?d is suggested in this paper to account for the different geological conditions; and a modified Mair equation is established which is not only suitable for the cases surface settlement trough with different width parameters, but also can be used for sands. Thus this modified general expression can be used to predict the subsurface ground movement with a broader adaptability compared with the original Mair equation. |
| Keywords: | tunnel subway subsurface ground movement deformation prediction settlement trough trough width parameter |
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