| 钻孔灌注桩施工过程对邻近隧洞影响数值分析 |
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| 引用本文： | 马文琪,朱珍德.钻孔灌注桩施工过程对邻近隧洞影响数值分析[J].河北工程大学学报,2017,34(4):32-36. |
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| 作者姓名： | 马文琪 朱珍德 |
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| 作者单位： | 河海大学 岩土力学与堤坝工程教育部重点实验室, 江苏 南京 210098;河海大学 江苏省岩土工程技术工程研究中心, 江苏 南京 210098,河海大学 岩土力学与堤坝工程教育部重点实验室, 江苏 南京 210098;河海大学 江苏省岩土工程技术工程研究中心, 江苏 南京 210098 |
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| 基金项目： | 国家自然科学基金资助项目（51579081，51379065） |
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| 摘 要： | 针对单排钻孔灌注桩施工过程对邻近隧洞的影响问题,运用FLAC3D建立三维简化模型,分析隧洞与桩间距S、桩长L对既有隧洞变形的影响规律。研究结果表明:隧洞竖向位移与S大致呈分段线性变化规律;为保证桩基施工过程中的隧洞结构稳定,S不宜小于6 m;桩长改变了桩底与隧洞在水平位置的关系,对既有隧洞的位移影响表现为有峰顶的双段线,桩底高程宜避免位于隧洞拱顶和拱底之间。
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| 关 键 词： | 钻孔灌注桩 邻近隧洞 FLAC3D 竖向位移 |
| 收稿时间： | 2017/8/1 0:00:00 |
Numerical analysis on bored pile construction for adjacent existing tunnel |
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| Authors: | MA Wenqi and ZHU Zhende |
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| Affiliation: | Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University, Nanjing 210098, China;Jiangsu Research Center for Getechnical Engineering Tecnology, Hohai University, Nanjing 210098, China and Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University, Nanjing 210098, China;Jiangsu Research Center for Getechnical Engineering Tecnology, Hohai University, Nanjing 210098, China |
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| Abstract: | Based on a cross-tunnel bridge construction project,the effects of two factors -the distance between tunnel and pile (S) and the length of the pile (L) on the tunnel deformation are analyzed in the FLAC3D model. The results showthat the vertical displacement of the tunnel and S are approximately piecewise linear. In order to ensure the stability of the tunnel structure during the construction of the pile foundation,S should not be less than 6m;Relative position between pile and the tunnel is determined by the length of pile,the bottom of the pile should be avoided at the arch of the tunnel. |
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| Keywords: | bored pile adjacent existing tunnel FLAC3D vertical deformation |
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