| 盾构法施工对既有桥基础变位的影响分析 |
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| 引用本文： | 王菲,禚一.盾构法施工对既有桥基础变位的影响分析[J].铁道工程学报,2011(6). |
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| 作者姓名： | 王菲 禚一 |
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| 作者单位： | 铁道第三勘察设计院集团有限公司,天津,300142 |
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| 摘 要： | 研究目的:盾构法施工对周围土体及既有建筑物的影响极为复杂,分析盾构施工过程中对周围既有桥梁基础的影响具有重要的工程价值和研究意义。本文以某隧道开挖的工程实例为背景,采用ABAQUS通用有限元软件,建立了结构的三维有限元模型,考虑了土体及其与结构间的非线性特性,模拟了盾构法隧道开挖的完整施工过程,最终得到了盾构施工过程中既有桥梁的承台和桩基础的变位规律。研究结论:分析表明,在开挖过程中,在开挖掌子面压力的作用下,前方土体隆起,最大隆起量为4.287 mm;由于开挖引起的土体损失、土体应力释放以及盾尾空隙的共同作用,导致盾构正上方及盾构后方的土体发生沉降,最大沉降量为6.651 mm。盾构施工过程中,承台将发生较大的竖向、横向和纵向变位,不可忽略。进行既有桥梁上部结构分析时应考虑承台的基础变位影响。
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| 关 键 词： | 盾构施工 桥梁 三维有限元 动态模拟 相互作用 基础变位 |
Analysis of Impact of Shield Tunneling on Displacement of Existed Bridge Foundation |
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| WANG Fei,ZHUO Yi.Analysis of Impact of Shield Tunneling on Displacement of Existed Bridge Foundation[J].Journal of Railway Engineering Society,2011(6). |
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| Authors: | WANG Fei ZHUO Yi |
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| Institution: | WANG Fei,ZHUO Yi (The Third Railway Survey and Design Institute Group Corporation,Tianjin 300142,China) |
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| Abstract: | Research purposes:The shield tunneling has the complicated impact on surrounding soil and existed structures,and analysis of the impact of the shield tunneling on the surrounding bridge foundation has significant engineering value and research meaning.Taking a tunnel excavation project as the background,a 3D finite element model is established by using ABAQUS to simulate the whole shield tunnelling process on considering the nonlinear characteristics of the soil-structure,and the displacement laws of the br... |
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| Keywords: | shield tunnelling bridge 3D finite element dynamic simulation interaction foundation displacement |
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