摘要
以福州市某软土地基上的电力管廊基坑为对象,研究采用坑底被动区加固的技术措施替代坑底下道支撑,从而避免坑底换撑过程并增大坑内的施工作业面,且对其进行技术、经济比较。分析结果显示:采用坑底被动区加固的技术措施,可以显著提高软土地区支挡式基坑的稳定性,避免换撑并合理增大坑内施工作业的空间,且不需要增加过多投资,是一种适合支挡式管廊基坑的支护方式。研究成果为该工程建设提供依据,也可为类似工程提供参考。
Taking a foundation pit of power cable tunnels in a soft ground in Fuzhou as the object,this paper studies the technical measures of adopting passive reinforcement at the bottom of the foundation pit to replace the support at the bottom of the foundation pit,to avoid the process of replacing the support at the bottom of the foundation pit and increase the construction operation underground surface,and makes a technical and economic comparison.The analysis results show that:Adopt technical measures on the reinforcement of the passive area bottom,can significantly improve the stability of foundation pit retaining wall in soft soil area,avoid in support and reasonable increase of pit construction work space,and do not need to add too much investment,which is a suited type of utility tunnel excavation retaining wall for supporting method,research results provide the basis for the engineering construction,and also provide a reference for similar projects.
作者
陈孝湘
黄晓予
林宇彬
阮筱菲
李继宇
CHEN Xiaoxiang;HUANG Xiaoyu;LIN Yubin;RUAN Xiaofei;LI Jiyu(POWERCHINA Fujian Electric Power Engineering Co.,Ltd.,Fuzhou 350003,China;State Grid Fujian Power Economic Research Institute,Fuzhou 350012,China)
出处
《建筑结构》
CSCD
北大核心
2020年第S02期793-796,共4页
Building Structure
基金
中国电建建设股份有限公司2017年度重点科技项目(DJ-ZDXM-2017-37)
国网福建省电力有限公司经济技术研究院管理咨询项目(SGFJJY00SJWT1900021)
关键词
软土地基
综合管廊
支挡式
破坏模式
被动区加固
soft clay
utility tunnel
retaining structure
failure mode
passive zone reinforcement
