水泥混凝土路面厚度、机场跑道以及巷道喷射混凝土厚度的检测，都具有重要意义和实用价值。目前大多数应用破损的取芯方法来验证厚度。如何用无损的方法检测厚度这是我们的课题。众所周知，混凝土是非均匀介质，特别是粗骨料的声散射给超声检测带来一定的难度。所以用超声波检 The thickness of cement concrete pavement, airport runway and the thickness of roadway shotcrete testing are of great significance and practical value. At present, most of the damaged coring methods are used to verify the thickness. How to use non-destructive method to detect the thickness This is our problem. As we all know, concrete is a heterogeneous medium, especially coarse aggregate acoustic scattering to bring certain degree of difficulty in ultrasonic testing. So with ultrasonic inspection