探地雷达在检测预应力梁钢绞线孔注浆效果的应用  

THE APPLICATION OF GROUND PENETRATING RADAR TO THE DETECTION OF THE DUCT GROUTING EFFECT OF BRIDGE PRESTRESSED STEEL STRAND

作　　者：李鸿军[1] 黎冬林 化得钧[1] 朱建[1] 魏星[1] 

机构地区：[1]四川省煤田地质工程勘察设计研究院,四川成都610072

出　　处：《物探与化探》2013年第4期696-700,共5页Geophysical and Geochemical Exploration

基　　金：湖南省教育厅科研项目(JB3040)

摘　　要：利用探地雷达进行预应力孔道注浆质量检测,根据Maxwell方程时域有限差分与Yee氏剖分网格,采取广义完全匹配层(GPML)作为吸收边界,对钢绞线注浆孔道中同埋深不同形状的含水及含气空洞进行二维正演,并结合工程进行开窗验证,总结得出同埋深不同形状、不同类型缺陷的探地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必要的理论依据。The ground penetrating radar has such merits as high-resolution, nondestructive operation, rapidness and intuitiveness, and these merits play an important role in the quality of grouting testing of prestressed duct. Using the generalized completely Matched Lay- er （GPML） as absorbing boundary and based on the Maxwell Finite Difference Time Domain methods （FDTD） and Yee grid, the au- thors made two-dimensional GPR simulation of the water and gas saturated grouting holes with the same depth and different shapes in the steel strand and, in combination with engineering window verification, summarized the characteristics and regularity of duct grouting defects of radar image. The method provides essential foundation for the grouting fullness degree of corrugated pipe tested by ground penetrating radar.

关 键 词：探地雷达 预应力孔道 含水含气空洞 时域有限差分 干扰波消减 工程质检 

分 类 号：P631[天文地球—地质矿产勘探]