基坑开挖对既有轨道桥梁结构的影响分析

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英文篇名：Analysis of the Effect of Foundation Pit Excavation on Existing Rail Bridge Structure 作者：文庆 英文作者：WEN Qing;Chongqing Architectural Design Institute of China; 关键词：有限元 ; 三维数值模型 ; 基坑开挖 ; 既有轨道桥梁结构 英文关键词：finite element;;three-dimensional numerical model;;excavation of foundation pit;;existing track bridge structure 中文刊名：JMDB 英文刊名：Journal of Jiamusi University(Natural Science Edition) 机构：重庆市设计院; 出版日期：2019-07-15 出版单位：佳木斯大学学报(自然科学版) 年：2019 期：v.37;No.161 语种：中文; 页：JMDB201904008 页数：4 CN：04 ISSN：23-1434/T 分类号：30-33

摘要

依托重庆市新燕尾山隧道工程,采用有限元软件Midas GTS,建立了拟开挖基坑与既有轨道桥梁结构的三维数值模型。通过计算得出了分别在有无支护桩条件下基坑开挖引起既有轨道桥梁结构的变形量,并认为支护桩在基坑开挖过程中对轨道桥梁结构变形有较好的抑制作用,且基坑开挖对既有轨道桥梁结构影响较小,风险可控。
        Relying on Chongqing New Yanweishan Tunnel Project,a three-dimensional numerical model for the excavation of foundation pit and the existing track bridge structure has been established by the finite element software Midas GTS. Based on calculation, the deformation of the existing track bridge structure caused by excavation of foundation pits with or without support piles is obtained, and it is considered that the retaining pile has a good inhibitory effect on the structural deformation of the track bridge during the excavation of foundation pit, and foundation pit excavation has less impact on existing rail bridge structure.

引文

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