混凝土结构缺陷的雷达检测方法研究  

A research on concrete structure defects detection by GPR

作　　者：刘金龙[1] 陆伟东[1] 路宏伟[2] 杨放[1] 曹华[1] 

机构地区：[1]南京工业大学土木工程学院,江苏南京210009 [2]江苏省建设工程质量监督总站,江苏南京210009

出　　处：《四川建筑科学研究》2009年第6期91-93,共3页Sichuan Building Science

基　　金：江苏省建设厅科技项目(JS200616)

摘　　要：介绍了探地雷达技术在混凝土结构无损检测中的应用原理,针对混凝土结构中钢筋干扰下缺陷雷达图像识别这一难点,制作了无钢筋和有钢筋的缺陷混凝土板,进行对比试验研究,得到了孔洞、裂缝、不密实等缺陷在无钢筋和有钢筋情况下的雷达波图像典型特征并做出识别,同时对注水后裂缝进行针对性试验。并将该方法应用到实际工程缺陷查找中,经取芯验证,雷达图像异常特征与缺陷实际位置吻合较好,取得了良好效果。The principle of the Ground Penetrating Radar （GPR） for testing concrete structure was presented. To overcome the difficulty in determining radar diagram with defects under steel bar, two special concrete slabs were made, one with steel bar, and the other with no steel bar,for compared experiment. The image characteristics of the defects under steel bar and no steel bar were shown. Crack injected water was also particular studied. Then this method was used to the engineering to detecting defects of concrete structure. The drilling verified that the anomaly characteristics of the GPR accorded with true position of the defects.

关 键 词：雷达 探地雷达 雷达图像 缺陷 干扰 

分 类 号：TU431[建筑科学—岩土工程]