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    快速地铁列车荷载下软土地基沉降数值模拟研究

    雷华阳, 张磊, 许英刚, 梁建文, 巴振宁

    雷华阳, 张磊, 许英刚, 梁建文, 巴振宁. 快速地铁列车荷载下软土地基沉降数值模拟研究[J]. 岩土工程学报, 2019, 41(S1): 45-48. DOI: 10.11779/CJGE2019S1012
    引用本文: 雷华阳, 张磊, 许英刚, 梁建文, 巴振宁. 快速地铁列车荷载下软土地基沉降数值模拟研究[J]. 岩土工程学报, 2019, 41(S1): 45-48. DOI: 10.11779/CJGE2019S1012
    shu
    LEI Hua-yang, ZHANG Lei, XU Ying-gang, LIANG Jian-wen, BA Zhen-ning. Numerical simulation of settlement of soft soil foundation under fast metro train loads[J]. Chinese Journal of Geotechnical Engineering, 2019, 41(S1): 45-48. DOI: 10.11779/CJGE2019S1012
    Citation: LEI Hua-yang, ZHANG Lei, XU Ying-gang, LIANG Jian-wen, BA Zhen-ning. Numerical simulation of settlement of soft soil foundation under fast metro train loads[J]. Chinese Journal of Geotechnical Engineering, 2019, 41(S1): 45-48. DOI: 10.11779/CJGE2019S1012
    shu

    快速地铁列车荷载下软土地基沉降数值模拟研究  English Version

    • 1. 天津大学土木工程系,天津 300354;
      2. 天津大学滨海土木工程结构与安全教育部重点实验室,天津 300354

    基金项目: 国家重点研发计划（2017YFC0805402）; 土木工程防灾国家重点实验室开放课题基金项目（SLDRCE17-01）; 国家自然科学基金项目（51578371）
    详细信息
      作者简介:

      雷华阳(1974—),女,河北冀州人,博士,教授,博士生导师,主要从事岩土工程等方面的教学和科研工作。E-mail:leihuayang74@163.com。

    Numerical simulation of settlement of soft soil foundation under fast metro train loads

    • 1. Department of Architectural Engineering, Tianjin University, Tianjin 300072, China;
      2. Key Laboratory of Coast Civil Structure Safety of Ministry of Education, Tianjin University, Tianjin 300072, China

    摘要

      摘要
    • 摘要: 地铁列车荷载作用下软土地基会产生沉降,如工后沉降和不均匀沉降等,影响其使用性能和使用寿命。为研究不同速度地铁列车荷载作用下软土地基的沉降特性,采用有限元软件ABAQUS建立三维动力有限元模型,对比分析了常规时速（80 km/h）和较快时速（120 km/h）下土体的沉降规律,并结合理论经验修改公式预测地铁运营工后沉降量。研究结果表明：列车运行速度越大,隧道下卧土体的波动越大,沉降曲线轮轨分布现象越明显,地表沉降槽的横向影响范围也越大,约为隧道轴线两侧各4.5倍隧道直径,但其工后沉降随地铁行车速度的增大而减小;在快速地铁列车荷载作用下土体竖向沉降的影响范围为3倍隧道直径;线路运营后一年沉降量约为57 mm,占累积沉降量的30%,20年后的累计沉降量约为190 mm。
      Abstract: The soft soil foundation will have settlement under the action of subway train load, such as post-construction settlement and uneven settlement, which will affect its service performance and service life. In order to study the settlement characteristics of soft soil foundation under different speed subway train loads, the finite element software ABAQUS is used to establish a three-dimensional dynamic finite element model. The settlement laws of the soil at normal speed (80km/h) and faster speed (120 km/h) are compared and analyzed, and by combining with the theoretical experience, the formula is modified to predict the post-construction settlement of the subway operation. The results show that, the greater the running speed of the train, the greater the fluctuation of the soil under the tunnel, the more obvious the distribution of the wheel-rail of the settlement curve, and the greater the lateral influence range of the surface settlement trough, which is about 4.5 times the diameter of the tunnel at both sides of the tunnel axis, but its post-construction settlement decreases with the increase of subway speed. The influences of vertical settlement of the soil under the action of fast subway train is 3 times the tunnel diameter. After the operation of the line, the settlement is about 57 mm in one year, accounting for 30% of the accumulated settlement, and the accumulated settlement after 20 years is about 190 mm..
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      • 参考文献(13)
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    出版历程
    • 收稿日期:  2019-04-27
    • 发布日期:  2019-07-14

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