摘要
北京城市副中心行政办公区政通东路综合管廊从既有地铁6号线盾构区间上方穿过,具有'大断面、浅覆土、近距离'的特点,施工难度和风险较大。经过理论分析和数值模拟,采用'顶进穿越、卸一还一、土体加固'的处理技术,减弱了上方土体开挖产生的卸载效应导致既有盾构隧道出现隆起变形的影响,从而保证了既有地铁区间结构的稳定性和地铁列车的正常营运。
Utility tunnel of Zhengtong East Road in the secondary city center of Beijing crossing above the shield interval of the existing subway line No.6 with the characteristics of large cross section,shallow covering soil,close range,the construction is difficult and risky.Through theoretical analysis and numerical simulation,the technical measures including jacking method,weighing,soil reinforcement are used,which decrease the effect on the existing subway tunnel due to excavation unloading,the stability of the existing subway tunnel structure and the normal operation of subway are ensured.
作者
毕成双
BI Chengshuang(Shanghai Municipal Engineering Design Institute(Group)Co.,Ltd.,Shanghai 200092,China)
出处
《施工技术》
CAS
2019年第17期89-92,共4页
Construction Technology
关键词
综合管廊
地铁
竖向变形
顶进
数值模拟
utility tunnel
subways
vertical deformation
jacking
simulation
