The performance characteristic of spherical boulder in the georadar detection
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摘要: 花岗岩风化壳中分布的孤石对工程建设有较大的危害,较准确地探明孤石的大小及分布具有重要的实际意义。笔者采用现场实测和数值模拟相结合的方法对球状孤石在探地雷达探测成果中的表现特征进行了研究。结果表明:雷达波在孤石处出现了明显的孤形反射,反射弧的张开宽度随孤石直径、埋深的的增加而增大;雷达波中孤石顶点处反射弧的曲率半径与孤石直径近似呈线性关系,与孤石埋深近似呈二次多项式关系。所得结论对孤石分布地区探地雷达探测成果的正确解释有一定的指导作用。Abstract: The boulder distributed in granite weathering crust has great harm on the engineering construction. Accurately determine the size and distribution of boulder has important practical significance. In this paper, by adopting the combination of field measurement and numerical simulation method to study the performance characteristic of spherical boulder in the georadar detection. The following conclusions are drawn:There is an obvious of radar wave in the boulder reflection. The open width of reflex is increase with the boulder diameter and the buried depth. In radar wave ,the radius of curvature of vertices has approximate linear relationship with the boulder di?ameter. And has Quadratic polynomial relationship with the buried depth. The conclusions obtained in this paper have a certain guiding role on analyzing georadar detection results about boulder.
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Key words:
- ground penetracting radar /
- forward modeling /
- FDTD /
- boulder detect
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