灌注桩超声波衰减系数成像方法研究

A Study on Ultrasonic Attenuation Coefficient Tomography for Cast-in-Place Pile

对带有空洞缺陷体的灌注桩模型进行了超声波成像观测,用反投影技术对波幅数据进行了衰减成像计算,所得图像清晰地显示出桩内空洞缺陷体的部位,并与速度成像相比较,其结果证明了该方法的有效性。

On the basis of the measured date of ultrasonic tomography for the cast-in-place pile which has a void defect, the back projection technique is used to calculate ultrasonic attenuation tomography. The result clearly shows the position of the void,and it is also compared with velocity tomography. It is proved that ultrasonic attenuation tomography on back projection technique is an effective imaging algorithm for cast-in-place pile.