暗挖通道下穿沉箱基础初期支护结构安全性分析  

SAFETY ANALYSIS OF THE PRIMARY SUPPORT STRUCTURE OF THE UNDERCUT CAISSON FOUNDATION

作　　者：陈英才 闫鑫雨 谭竹青 CHEN Ying-cai;YAN Xin-yu;TAN Zhu-qing(Rail Tramsit Bramch,China Comumications Construction Co,Ltd.,102200,Bejing,China;CCCC(Guangzhou)Coustruction Co,Ltd,511466,Guangzbou,China)

机构地区：[1]中国交通建设股份有限公司轨道交通分公司,北京102200 [2]中交(广州)建设有限公司,广州511466

出　　处：《建筑技术》2024年第5期536-538,共3页Architecture Technology

摘　　要：基于地铁车站紧急联络通道下穿建筑物开挖过程中极易引发的较大变形问题,对下穿过程隧道沉箱基础变形和加固措施进行总结分析,采用有限元分析软件对下穿过程进行数值模拟,根据现场监控量测数据结果分析效果。结果表明:由于上部沉箱的棚架作用,开挖过程中初期支护主要承受初期支护及沉箱间覆土的厚度及较小部分沉箱下传的作用力,研究结果可为类似项目施工提供借鉴。Based on the large deformation problem easily caused by the excavation of the underpass building of the emergency communication channel of the subway station, the deformation and reinforcement measures of the tunnel and caisson foundation during the underpass process were summarized and analyzed. The finite element analysis software was used to conduct numerical simulation of the underpass process, and the effect was analyzed according to the results of the on-site monitoring and measurement data. The results show that, due to the scaffolding effect of the upper caisson, the initial support mainly bears the thickness of the initial support and the covering soil between caissons,as well as the downward force of a small part of caissons. The research results can provide reference for similar projects.

关 键 词：地铁车站 数值模拟 下穿施工 

分 类 号：TU924[建筑科学—建筑设计及理论]