风电基础等大体积混凝土的无损检测一直是工程难题，常规无损检测手段存在探测距离较浅，无法穿透内部密集钢筋网，不能应用在只有一个可测面的被测体中等缺点。内蒙某风电基础由于施工不当，内部存在冷缝等病害，为判断冷缝位置并评估其质量，对其进行了无损检测。选用声波散射成像技术，在克服拉姆波干扰，应用数学相控阵增强探测深度与分辨率后，得到了能清晰显示混凝土分层界面、冷缝分布和混凝土抗压强度分布的试验结果。其结果显示的低速界面与钻孔取芯得到的冷缝位置一致，为后续开展针对性修复工作提供了详实资料。

The quality test of large-volume concrete such as wind power foundation has always been an engineering problem. The conventional nondestructive testing methods have problems such as the shallow detection distance, the inability to penetrate the dense steel mesh inside, and the inability to detect on a measurable surface. In order to determine the location of cold joints and evaluate their quality, a wind power foundation in Inner Mongolia has undergone nondestructive testing due to its construction. In the case of overcoming Lamb wave interference and applying mathematical phased array to enhance the detection depth and resolution, acoustic scattering imaging technology can clearly show the results of concrete layered interface, cold joint distribution and intensity distribution. The results show that the low-speed interface is consistent with the fracture location displayed by drilling and coring, providing detailed information for subsequent targeted repair work.