探地雷达在预应力梁钢绞线孔道注浆质量检测中的应用  

Application of ground penetrating radar in grouting quality testing in duct of prestressed steel strand

作　　者：化得钧[1] 王齐仁[1] 王坤[2] 黄玉凤[1] 张建[1] 邓国文[1] 

机构地区：[1]湖南科技大学土木学院,湖南湘潭411201 [2]安徽省交通投资集团有限责任公司,安徽合肥230088

出　　处：《煤田地质与勘探》2013年第3期46-50,共5页Coal Geology & Exploration

摘　　要：混凝土桥梁波纹管的注浆饱满程度直接关系到桥梁的安全和使用寿命,目前还没有能够准确检测波纹管注浆质量的方法。使用广义完全匹配层(GPML)作为吸收边界,依据时域有限差分法(FDTD),对钢绞线注浆孔道中同埋深不同大小的空洞进行二维正演,并结合工程进行开窗验证,总结不同缺陷的雷达图像特征及其规律,为探地雷达法检测波纹管注浆饱满度提供了理论依据。The grouting fullness degree of concrete bridge is directly related to the bridge safety and life. However, the present methods cannot accurately test the corrugated pipe grouting quality of corrugated pipe. The paper, using the generalized completely matched layer （GPML） as absorbing boundary, based on the finite difference of time domain （FDTD）, made 2-D GPR simulations of the grouting hole with same depth and different size in the steel strand, in combination with engineering window verification, summarized the characteristics and rules of duct grouting defects in radar image. The method provides theoretical foundation for detection of grouting fullness de- gree of corrugated pipe by ground penetrating radar.

关 键 词：探地雷达 预应力孔道 时域有限差分 干扰波消减 注浆质量 

分 类 号：TU47[建筑科学—结构工程]