摘要
文中以郑州金融岛外环地下道路工程的上跨地铁四号线区间基坑为工程背景,首先通过工程案例搜集和研究,总结上跨地铁的基坑工程在设计与施工中常用的保护措施;其次采用PLAXIS-3D软件对基坑的施工过程进行动态模拟,分别对分坑开挖、土体加固以及设置抗拔桩等措施进行了规律性研究。依据研究结果分析出不同工程措施对降低基坑开挖对既有下卧地铁隧道影响的有效性及规律性,为类似工程设计提供相关参考。
This paper takes the foundation pit of outer ring underground road in Zhengzhou financial Island over Subway Line 4 as an example.First of all,common protection measures in the design and construction of the foundation pit engineering overpassing subway are summarized by investigating similar cases.Secondly,regularity study of related measures including excavation of each pit,soil reinforcement and setting of uplift pile is carried out via dynamic simulation of the construction process in Plaxis-3 D.Finally,the effectiveness and regularity of different measures to reduce the impact of foundation pit excavation on existing subway tunnel,which provides relevant reference for similar engineering design.
作者
巩生龙
GONG Shenglong(Shanghai Municipal Engineering Design Institute(Group)Co.,Ltd.,Shanghai 200092,China)
出处
《低温建筑技术》
2021年第5期107-111,共5页
Low Temperature Architecture Technology
关键词
上跨地铁
数值模拟
基坑开挖
overpass subway tunnel
numerical simulation
pit excavation
