| 大断面基坑开挖全过程对既有隧道的变形影响分析 |
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| 引用本文： | 徐涛,陈梁.大断面基坑开挖全过程对既有隧道的变形影响分析[J].路基工程,2020,0(6):86-92. |
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| 作者姓名： | 徐涛 陈梁 |
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| 作者单位： | 中交第二公路勘察设计研究院有限公司,武汉430000;北京城建设计发展集团股份有限公司,北京100000 |
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| 摘 要： | 以合肥地铁3号线邻近的经开区大学城地下空间开发工程为背景，采用理论分析、数值模拟的方法，分析了基坑围护结构施工、基坑开挖及主体结构回筑过程中基坑对既有隧道的变形响应。研究结果表明:基坑施工对邻近既有隧道的影响主要以水平位移为主，同时大断面基坑开挖对隧道的影响较小；施工过程中，基坑及既有隧道结构的位移在容许的范围内，验证了围护结构的合理性。
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| 关 键 词： | 大断面基坑 既有地铁隧道 变形响应 施工全过程 有限元分析 |
| 收稿时间： | 2020-07-01 |
Analysis on the Influence of the Whole Excavation Process of Large Section Foundation Pit on the Deformation of Existing Tunnels |
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| Abstract: | Based on the underground space development project of the University Town in the economic development zone near Hefei Metro Line 3, the deformation response of the foundation pit to the existing tunnel in the process of the construction of foundation pit enclosure structure, foundation pit excavation and main structure reconstruction is analyzed by the method of theoretical analysis and numerical simulation. The results show that the influence of foundation pit construction on the adjacent existing tunnels is mainly horizontal displacement, while the influence of large section foundation pit excavation on the tunnel is small. During the construction, the displacement of the foundation pit and the existing tunnel structure is within the allowable range, which verifies the rationality of the enclosure structure. |
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