隧道衬砌注浆后地质雷达检测图像判释研究  

Study on Image Interpretation of GPR Detection After Tunnel Lining Grouting

作　　者：刘愿愿 蒋欢 杨振荣 王祖耀 LIU Yuan-yuan;JIANG Huan;YANG Zhen-rong;WANG Zu-yao(China Jikan Research Institute of Engineering Investigations and Design,Co.,Ltd.,Xi’an,Shaanxi 710000,China;CCCC Second Highway Engineering Co.,Ltd.,Xi’an,Shaanxi 710000,China)

机构地区：[1]机械工业勘察设计研究院有限公司,陕西西安710000 [2]中交第二公路工程局有限公司,陕西西安710000

出　　处：《黑龙江交通科技》2023年第4期106-108,共3页Communications Science and Technology Heilongjiang

摘　　要：以隧道衬砌混凝土成分固定,电参数基本固定为基础,根据反射系数分析了不同介质填充隧道衬砌背后空腔时地质雷达的典型波形特征,并通过检测实例验证了分析的正确性。分析表明:如果空腔顶面的地质雷达反射波为反相反射波,则空腔填充物为潮湿水泥浆。如果空腔顶面的地质雷达反射波为同相反射波,存在多次反射波或第二个波峰幅值接近于第一个波谷,则空腔填充物为空气。如果空腔顶面的地质雷达反射波为同相反射波,不存在多次反射波且第二个波峰幅值接近于第一个波峰,则空腔填充物为干燥水泥浆。这种判释方法弥补了衬砌施工中地质雷达检测隧道质量的局限性,为地质雷达进一步发展提供了新思路。Based on the fixed composition of tunnel lining concrete,and its electrical parameters is basically fixed,this paper analyzes the typical waveform characteristics of GPR when different media fill the cavity behind tunnel lining according to the reflection coefficient,and verifies the correctness of the analysis through inspection examples.The analysis shows that if the GPR reflection wave on the top surface of the cavity is an inverse reflection wave,the cavity filling is moist cement slurry.If the GPR reflected wave on the top surface of the cavity is in-phase reflected wave,there are multiple reflected waves or the amplitude of the second wave peak is close to the first wave trough,the cavity is filled with air.If the GPR reflection wave on the top surface of the cavity is in-phase reflection wave,there is no multiple reflection wave and the amplitude of the second wave peak is close to the first wave peak,the cavity filling is dry cement slurry.This interpretation method makes up for the limitations of GPR in detecting tunnel quality brought by the progress of lining construction methods,and provides a new idea for the further development of GPR.

关 键 词：地质雷达 隧道衬砌 检测 三振相 

分 类 号：U433[交通运输工程—道路与铁道工程]