| 大断面黄土隧道加宽过渡段变形特性三维数值分析 |
| Three dimensional Numerical Analysis of Widened Location’s Deformation Properties of Large Section Loess Tunnel |
| 投稿时间：2013-04-02 |
| 中文关键词:大断面 黄土隧道 加宽段 变形 三维数值 |
| 英文关键词:large section loess tunnel widened location deformation three dimensional numerical |
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| 中文摘要: |
| 针对三车道公路隧道加宽段空间跨度大，加宽过渡段设计难度大的难题。以某三车道黄土隧道为依托，采用三维有限元仿真的方法，对加宽过渡段的支护结构和围岩的变形规律进行了研究。研究结果表明：加宽过渡段处初支结构的变形呈现不对称性。距过渡段10 m范围以外加宽段围岩变形趋于对称。加宽段施工对正常段的围岩变形影响较小，对加宽段围岩的影响范围约为10 m。故在三车道公路隧道的加宽段施工过程中，除加强支护外，距离过渡断面的前10 m加宽段施工应提高监控量测频率。 |
| 英文摘要: |
| For the problem of three lane highway tunnel widened location’s large span and difficulty in its design，a three lane loess highway tunnel is taken as an example. The 3D finite element simulation is adopted to study the deformation regularity of surrounding rock around the widened location．The research results are as follow： The deformation of surrounding rock around the widened location is unsymmetrical. The deformation of surrounding rock beyond 10 m from the widened boundary tends to be symmetrical. The influence of widened location construction on the surrounding rock deformation of regular location is small. The range of influence on the widened location is about 10 m. Besides enforcing the supporting structure, the monitoring frequency of surrounding rock deformation should be increased for the widened location construction within 10 m of the widened section in the construction of three lane highway tunnel. |
| 孙志杰.大断面黄土隧道加宽过渡段变形特性三维数值分析[J].石家庄铁道大学学报：自然科学版,2014,(3):18-22. |
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