基于光纤测温技术对地下连续墙接缝质量缺陷检测的研究  

Research on Detection of Quality Defects of Diaphragm Wall Joints by Fiber Optic Temperature Measurement Technology

作　　者：王成荣[1] Wang Chengrong

机构地区：[1]上海市隧道工程轨道交通设计研究院

出　　处：《隧道与轨道交通》2021年第4期26-28,55,共4页Tunnel and Rail Transit

摘　　要：由于工程地质和地下水的复杂性,工程勘察、设计或施工过程往往出现许多不当,所以深基坑工程事故时有发生。其中相当大一部分事故是对基坑渗漏水控制不当而造成的。结合上海轨道交通18号线长江南路站基坑工程实践,以基于光纤测温技术的线性关系为依托,对地下连续墙施工过程中的接缝质量进行实时动态检测,并分别在地下连续墙施工阶段混凝土浇筑完成后凝固过程中,分析和研究水化热作用形成的混凝土温度变化的均衡性,以及基坑开挖前后阶段地下连续墙接缝部位的温度场变化,来判断是否存在异常区域,以此再来判断地下连续墙接缝是否存在质量缺陷。Due to the complexity of engineering geology and groundwater,mistakes may be made in engineering survey,design or construction process.Especially for deep excavation engineering,accidents occur from time to time,and a large part of them are caused by improper control of water leakage in excavation.Combined with the engineering practice of the excavation of South Changjiang Road Station of Shanghai Rail Transit Line 18,the quality of the joints during the construction of diaphragm wall is examined in real time and dynamically based on fiber optic sensing technology.The quality defect judgment is based upon the temperature change of heat of hydration during the hardening of concrete of diaphragm wall,and the temperature change at diaphragm wall joints before and after the excavation respectively.

关 键 词：光纤感测 地下连续墙 基坑渗漏水 测温 接缝缺陷 

分 类 号：TU476.3[建筑科学—结构工程] TU712.3[建筑科学—土工工程]