当桩身存在某些缺陷而造成桩身砼密度或截面积或速度变化时，必然引起波阻抗

当桩身存在某些缺陷而造成桩身砼密度或截面积或速度变化时，必然引起波阻抗的差异，从而产生波的反射和叠加，这些信号被放置在桩顶的传感器所接收，这个过程受桩的弹性模量、土的剪切模量及桩土体系刚度等诸多因素的影响。

結果 (英文) 1:

When the pile has some defects caused the pile of concrete density or area or speed changes, inevitably lead to impedance differences, resulting in a wave of reflection and stacking, these signals are placed on top of the sensor receives, this process of elastic modulus of pile and soil shear modulus and influence of rigidity of pile-soil system, and many other factors.

結果 (英文) 2:

When the pile there are some defects caused by the pile of concrete density or cross-sectional area or speed changes, would inevitably lead to differences in acoustic impedance, resulting in wave reflection and superimposed, these signals are placed on top of the pile received by the sensor, this procedure Effect of elastic modulus by the pile of soil shear modulus and pile soil system stiffness and many other factors.

結果 (英文) 3:

When there are some defects in the pile, the difference of the wave impedance, which is caused by the difference of the wave impedance, and the reflection and stacking of the wave, is placed in the sensor of the pile top.