邻近桥桩地铁车站施工数值模拟及敏感性分析

姜谙男; 塔拉; 李鹏

邻近桥桩地铁车站施工数值模拟及敏感性分析 English Version

大连海事大学道桥所,辽宁大连 116026

详细信息

作者简介:
姜谙男（1971- ），男，山东烟台人，博士，教授，主要从事地下工程及岩土工程的科研与教学工作。E-mail: jiangannan@163.com。

中图分类号: TU473
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出版历程
- 收稿日期: 2013-06-14
- 发布日期: 2013-11-24

Numerical simulation and sensitivity analysis for construction of metro station near bridge pile

Highway and Bridge Engineering Institute, Dalian Maritime University, Dalian 116026, China

摘要

摘要: 在城市中修建地铁隧道的过程中,开挖扰动对既有建筑和桥桩的影响问题特别值得关注。大连地铁2号线香工街车站采用明挖法施工,高架桥桥桩外边缘距离车站主体结构外墙净距仅2.55m,车站开挖对高架桥影响极大。采用数值模拟的方法研究隧道施工对近接高架桥的影响,模拟获得了各开挖时步的地层位移、最大主应力、围护桩位移和桥桩位移。在数值模拟基础上,采用正交设计方法,根据极差分析原理,分析E₂,μ₂,E₃,μ₃,c₃和φ₃6个因素对于地表沉降、桥墩沉降、桩体倾斜、支撑轴力及桥墩倾斜的影响,获得敏感性的排序。分析结果对于该工程的施工的反馈分析和方案评价具有积极的意义。
- 地铁车站 /
- 明挖 /
- 近接施工 /
- 三维数值模拟 /
- 敏感性
Abstract: In the construction process of metro tunnel, to special attention should be paid the problem of excavation disturbance affecting the adjacent piles of buildings and bridges. Xianggong Station of Dalian metro line No. 2 adopts the open excavation method. There is only a distance of 2.55 m between the trestle bridge pile and the external wall of main metro structure. How the tunnel excavation and supporting affect the trestle bridge is studied by means of numerical simulation. The displacements of ground strata, the maximum stresses and the displacements of skirt pipes and bridge piles are obtained. Based on the numerical simulation, by adopting the orthogonal method and the extreme difference method, the influences of six factors of E₂, μ₂, E₃, μ₃, c₃ and φ₃ on the settlements of ground surface and bridge pier, leanings of skirt pipes and bridge piles and supporting force are analyzed, and the sensitivity sequence of the factors is obtained. The analysis results have active meaning for the feedback analysis and construction scheme appraisement.
- metro station /
- open excavation /
- approaching construction /
- 3-D numerical simulation /
- sensitivity

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参考文献(7)

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