| 明挖隧道深基坑施工对近邻高速公路桥梁桩基的影响研究 |
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| 引用本文： | 余富先.明挖隧道深基坑施工对近邻高速公路桥梁桩基的影响研究[J].路基工程,2021,0(2):181-186. |
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| 作者姓名： | 余富先 |
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| 作者单位： | 中铁隧道集团三处有限公司，广东深圳 518000 |
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| 摘 要： | 以明挖隧道深基坑施工与近邻高速公路桥梁桩基的深（圳）中（山）通道工程为研究对象，采用有限元方法建立三维有限元模型，分析隧道基坑施工对近邻桥梁桩基的影响。结果表明:现有基坑围护结构设计方案和施工工况，其筑岛施工和暗埋段施工过程对既有沿江高速桥梁桩基的影响较小；水平附加位移（朝基坑侧位移）和竖向附加位移（沉降）均在规范允许范围内；主线隧道基坑开挖施工将在既有桥梁桩基中产生附加内力，应提前对既有桥梁采取保护措施。
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| 关 键 词： | 明挖隧道 深基坑 围护结构 近邻结构 桥梁桩基 数值模拟 |
| 收稿时间： | 2020-11-05 |
Study on the Influence of Open Excavation Tunnel Deep Foundation Pit Construction on Bridge Pile Foundation of Adjacent Highway |
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| Abstract: | In this paper, the channel project of open excavation tunnel deep foundation pit construction and the bridge pile foundation of adjacent highway in Shenzhen—Zhongshan is used as the research object. The finite element method is used to establish a three-dimensional finite element model and analyze the influence of the tunnel foundation pit construction on the adjacent bridge pile foundation. The results show that: according to the design plan of the existing foundation pit retaining structure and construction conditions, the island construction and the buried section construction process have little impact on the bridge pile foundation of the existing highway along the river, and the horizontal additional displacement (toward the foundation pit lateral displacement) and vertical additional displacement (settlement) are within the allowable range of the code. However, due to the excavation of the main line tunnel foundation pit, a certain internal force will be generated in the existing bridge pile foundation, and the protective measures should be taken in advance for the existing bridge. |
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