中文核心期刊
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重庆交通大学学报（自然科学版）

重庆交通大学学报（自然科学版） ›› 2019, Vol. 38 ›› Issue (07): 66-71.DOI: 10.3969/j.issn.1674-0696.2019.07.11

• 道路与铁道工程 • 上一篇    下一篇

深基坑开挖对临近运营铁路的变形影响

詹涛1，胡长明2，钱伟丰3，蒋鑫驰2   

  1. (1. 南昌轨道交通集团有限公司，江西 南昌 330038； 2. 西安建筑科技大学 土木工程学院，陕西 西安 710055； 3. 南昌工学院 建筑工程学院，江西 南昌 330108)
  • 收稿日期:2018-03-29 修回日期:2018-06-11 出版日期:2019-07-02 发布日期:2019-07-02
  • 作者简介:詹涛(1981—)，男，江西南昌人，高级工程师，主要从事城市轨道交通方面的研究。E-mail:2825398065@qq.com。
  • 基金资助:
    国家自然科学基金项目(51408463)；陕西省教育厅专项科研计划项目(15JK1413)

Influence of Deep Excavation Construction on the Deformation of Adjacent Railway in Operation

ZHAN Tao1，HU Changming2，QIAN Weifeng3，JIANG Xinchi2   

  1. (1. Nanchang Rail Transit Group Co., Ltd., Nanchang 330038, Jiangxi, P. R. China; 2. College of Civil Engineering, Xian University of Architecture and Technology, Xian 710055, Shaanxi, P. R. China; 3. College of Architecture Engineering, Nanchang Institute of Science and Technology, Nanchang 330108, Jiangxi, P. R. China)
  • Received:2018-03-29 Revised:2018-06-11 Online:2019-07-02 Published:2019-07-02

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摘要： 以南昌地铁3号线上沙沟车站临近既有铁路线的基坑工程为依托，采用有限元软件对基坑开挖的全过程进行模拟，分析了基坑开挖对临近运营铁路的变形影响及铁路加固方案的可靠性。结果表明：在基坑开挖过程中，最大轨道轨距偏差、轨道水平差异沉降接近报警值，影响列车正常运行。设置钻孔灌注桩与旋喷止水桩后，能有效减小基坑开挖对铁路的变形影响，加固效果显著。基坑的空间效应在坑角处十分明显，隔离结构的设置使空间效应更加复杂，易引起位移突变，应在今后的实际工程中引起重视。

关键词: 铁道工程, 岩土工程, 深基坑, 运营铁路, 轨道变形, 空间效应, 数值模拟

Abstract: Based on the excavation engineering of Shangshagou Station near the existing railway line on Nanchang Metro Line 3, the whole process of foundation pit excavation was simulated by the finite element software. Meanwhile, the influence of foundation pit excavation on deformation of adjacent railway in operation and the reliability of railway reinforcement schemes were both analyzed. The results show that: during the excavation of foundation pit, the maximum track gauge deviation and horizontal differential settlement of track approach the alarm value, which affects the normal operation of train. After setting drilling piles and sealing up piles with jet grouting, the effect of foundation pit excavation on railway deformation can be effectively reduced, and the reinforcement effect is remarkable. The space effect of the deep excavation is obvious at the pit angle. The setting of the isolation structure makes the spatial effect more complex and causes the displacement mutation easily, which should be paid attention to in future practical projects.

Key words: railway engineering, geotechnical engineering, deep excavation, railway in operation, rail deformation, space effect, numerical simulation

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