摘要
对于既有轨道交通区间隧道上方的深基坑开挖,采用“三轴搅拌桩‘门式加固’+抽条开挖+抗拔桩”等多种技术措施,减少了基坑土体卸载过程中引起的隧道纵向不均匀变形。通过合理安排各个工序,确保施工速度,进而控制整个隧道的变形量,可供相关工程借鉴。
For the deep foundation pit excavation above the existing tunnel in the rail transit section,it adopts the technical measures of three axis mixing pile door reinforcement+strip excavation+anti-pulling pile,which reduces the longitudinal uneven deformation of the tunnel caused by the unloading of the foundation pit soil.By arranging each process reasonably,ensuring the construction speed,and then controlling the deformation of the whole tunnel,it can be used for reference for the related projects.
作者
陈方
CHEN Fang(Shanghai Huangpu River Cross-River Facility Investment&Construction Development Co.,Ltd.,Shanghai 200040,China)
出处
《中国市政工程》
2021年第2期84-87,128,共5页
China Municipal Engineering
关键词
基坑
软土地基
卸载
门式加固
抽条开挖
抗拔桩
foundation pit
soft soil foundation
unloading
door reinforcement
strip excavation
anti-pulling pile