探地雷达在水工建筑物地基病害检测中的应用  

Application of GPR in Foundation Disease Detection of the Hydraulic Structures

作　　者：谢蒙[1] 汤金云[1] 

机构地区：[1]中水珠江规划勘测设计有限公司,广东广州510610

出　　处：《人民黄河》2012年第9期105-107,共3页Yellow River

摘　　要：通过现场试验,研究了探地雷达电磁反射波在钢筋混凝土干扰背景下的特点。通过对深部弱信号的有效提取,并结合现场实际资料,得出了强干扰条件下地基病害异常时探地雷达反射波的特征。指出:探测人工建筑物地基基础时,可选择中心频率稍高的天线,获得适宜的探测深度,提高空间分辨率;连续测量时,应尽量减小天线最大移动速度,保证对目标体的扫描频次;只要合理确定目标体物理特征及工作环境、测网布置、测量参数、电磁波速度,就可得出强干扰条件下探地雷达反射波特征,对地基病害异常体准确成像。Following the test on site, we researched the characteristics of GPR electromagnetic radar, and the GPR reflection echo＇ s characteristics could be obtained via extraction for deeply weak signal and combining field practical data when foundation disease was abnormal. That detecting foundation basis of artificial building, we can select HF antenna for obtaining suitable detection depth and improving spatial resolution ratio. We must decrease the largest speed of antenna for guaranteeing the number of scanning when doing continuous measurement. We can image accurately foundation disease abnormal, and obtain GPR reflection characteristics in efficient extraction if determine reasonably the target physical characteristics, working environment, layout of survey grid, measurement parameters and electromagnetic speed.

关 键 词：探地雷达 地基病害检测 钢筋混凝土 

分 类 号：TV223.3[水利工程—水工结构工程]