盾构下穿诱发框架结构沉降实测与模拟分析  

Settlement Monitoring and Simulation Analysis of Frame Structure Induced by Shield Tunneling

作　　者：刘庭金[1] 陈培钊 蔡良怡 林志威 LIU Tingjin;CHEN Peizhao;CAI Liangyi;LIN Zhiwei(State Key Laboratory of Subtropical Building and Urban Science,South China University of Technology,Guangzhou,Guangdong510640,China;School of Civil Engineering and Transportation,South China University of Technology,Guangzhou,Guangdong510640,China)

机构地区：[1]华南理工大学亚热带建筑与城市科学全国重点实验室,广东广州510640 [2]华南理工大学土木与交通学院,广东广州510640

出　　处：《施工技术（中英文）》2024年第4期74-80,149,共8页Construction Technology

摘　　要：为研究盾构隧道施工对上方框架结构的影响,以广州市综合管廊盾构斜交下穿中高层框架结构为工程背景,采用现场沉降监测及数值反演的方法分析结构的响应规律。结果表明:本工程盾构下穿位置的柱基沉降过程表现为主要沉降-沉降回弹-沉降稳定3个阶段;沉降较大的柱基主要分布在盾构轴线沿线位置,差异沉降较大的柱基则主要分布在盾构轴线的周边位置;盾构的穿越位置会影响建筑物的倾斜趋势;盾构穿越后及时进行洞内二次注浆,能减小框架结构在稳定阶段的沉降、不均匀沉降及整体倾斜。In order to study the influence of shield tunnel construction on the upper frame structure,taking the shield of Guangzhou utility tunnel undercrossing the middle and high-rise frame structure as the engineering background,the response law of the structure is analyzed by means of on-site settlement monitoring and numerical inversion.The results show that the settlement process of the column foundation at the undercrossing position of the shield in this project is mainly manifested in three stages:main settlement,settlement rebound and settlement stability.The column bases with large settlement are mainly distributed along the axis of the shield,and the column bases with large differential settlement are mainly distributed around the axis of the shield.The crossing position of the shield will affect the inclination trend of the building.The secondary grouting in the tunnel in time after the shield crossing can reduce the settlement,uneven settlement and overall inclination of the frame structure in the stable stage.

关 键 词：隧道 盾构 框架结构 沉降 监测 数值模拟 

分 类 号：TU94[建筑科学—建筑技术科学]