利用小波阈值去噪的反射波护堤抛石量检测方法试验

水利工程中抛石堤岸数量众多,抛石的数量检测是抛石质量检验的一项重要指标,对工程质量控制、造价控制、竣工验收或后期隐患排查具有重要意义。而目前的抛石数量检测方法较少,效果不佳;为有效检测抛石量,试验采用地质雷反射观测法对护堤抛石方量进行了检测,运用折衷的小波阈值去噪方法对雷达抛石断面图像进行去噪处理,获得了准确的抛石断面边界;并将每段抛石近似为棱台计算了抛石方量,最终总抛石方量为14 700方,误差率3.52%,与实际工程量吻合良好,验证了利用小波去噪的地质雷达抛石数量检测方法的可行性,为其他工程的抛石量检测提供新的思路和途径。

Research on the method for the quantity measurement of embankment ripraps by using GPR technique with wavelet threshold de-nosing

There are a lot of riprap-embankments in hydraulic projects, and the quantity detection of ripraps is an important part of quality inspection that it is significant and necessary for either its constructions or maintenances. But the efficient way to measure the quantity is lacked at present. For measuring the ripraps quantity accurately, the experiment decided using GPR technique to detect the quantity of embankment ripraps, using wavelet compromise threshold way to remove the signal noise from radar images. And we got the accurate sectional views of embankment ripraps. Meanwhile, each segment of the ripraps considered as a prismoid was calculated its quantity and the final result was well consistent with the quantity of actual data, of which the total amount of embankment ripraps was 14700 m₃ with the only 3.52% error rate, verifying the feasibility of the GPR way in riprap detections and providing an new idea of detection ways for another similar works.