土工基础

›› 2019, Vol. 33 ›› Issue (3): 239-242.

• 工程实录 •    下一篇

特大基坑对市域铁路安全风险及影响分析

蒋 颖1,武守相1,张德海1,黄 伟2   

  1. （1.中国市政工程中南设计研究总院有限公司，武汉 430010;2.铁二院华东勘察设计有限责任公司，杭州 310004)
  • 收稿日期:2019-04-15 修回日期:2019-04-22 出版日期:2019-06-20 发布日期:2019-08-16
  • 作者简介:蒋 颖（1978-），男，高级工程师，研究方向为城市轨道交通及隧道工程设计。
  • 基金资助:

    中国市政工程中南设计研究总院有限公司科研课题（项目编号KY-N-L-2018-002）

Impact of Large Deep Excavation on the Safety Hazards of Rail Transit

JIANG Ying1, WU Shouxiang1, ZHANG Dehai1, HUANG Wei2   

  1. (1.Central and Southern China Municipal Design & Research Institute Co., Ltd., Wuhan 430010
    ;2.CREEC East China Survey and Design Co., Ltd., Hangzhou 310004)
  • Received:2019-04-15 Revised:2019-04-22 Online:2019-06-20 Published:2019-08-16

摘要： 特大基坑施工易给周边环境敏感要求较高的市域铁路带来不利的安全影响，基坑围护应根据周边环境不同进行分段设计，临近市域铁路段采用混凝土斜撑与斜包撑进行支护，并结合基坑分块分段施工及时施加支撑体系，减少基坑无支撑防护时间，加固基坑主动区的土体，减少水土流失。采用数值计算方法对基坑开挖时温州市域铁路S1线桥台及周边站房的影响进行分析，结果表明，可知该方案对市域铁路的影响可控，设计合理。

关键词: 特大基坑, 市域铁路, 斜包撑, 加固, 桥台

Abstract: The large foundation excavation will likely induce adverse effect on the operation of the adjacent rail transit, which is sensitive to the vibration and deformation. The design of the supporting structure for the foundation excavations near the rail transit should consider the site-specific environments. In this paper, a case history of the deep excavation near a rail transit line in Wenzhou is presented. The supporting for the proposed excavation area near the transit line was designed by using reinforced concrete rakers and earth berm support. Further, zoned excavation and temporary supporting system. Other effective methods, such as, reduce the time for the unsupported excavated area, ground improvement at the passive earth pressure zone at the bottom of excavation and minimize the soil erosion, could also considered. The paper also presents a numerical study results of foundation excavation effect on the transit bridge abutment of Line S1 and other adjacent train station structures. 

Key words: Large Deep Excavation, Rail Transit, Earth Berm Support, Ground Improvement, Bridge Abutment