基桩完整性检测中的波速问题

Wave velocity problems in integrity test of pile foundation

运用波动力学理论 ,分析了应力波在三维状态下的纵波波速与一维状态下纵波波速的区别 ,指出在用反射波法判别基桩浅部缺陷的深度时 ,应考虑三维效应对应力波波速的影响 ,所采用的波速应为正常波速的 1.2倍。

Applying wave mechanics the differences of the longitudinal speed of stress wave in three-dimension and one dimension status are analyzed. Author points out that the influences of three-dimensional effect on speed of stress wave must be considered when reflection method is used to measure the depth of shallow defects in pile foundation. On this account the practical speed should be considered as 1.2 times larger than normal speed.