低应变反射波法在PHC管桩检测中的应用和探讨

Test Application and Discussion on Low Strain Reflection Method in PHC Steel Pipe

阐述了低应变反射波法检测桩体的原理,通过工程实例对低应变反射波法检测PHC管桩有关问题进行了探讨。结果表明,根据PHC管桩不同缺陷时所对应的波形变化可初步判断缺陷性质,对浅部缺陷用尼龙锤,应尽量减少接桩数量和加强接桩施工质量,低应变反射波法时域曲线分析可以结合频域曲线共同分析。

The test principles are elaborated on the low strain reflection method in steel pipe inspection. Related questions about the low strain reflection method are discussed in the PHC steel pipe. The results indicated that the flaw nature can be judged initially according to different flaws correspond the profile change in PHC steel pipe. The nylon hammer should be used in the shallow flaw. The pile extension quantity, should be reduced and the pile extension construction quality should enhanced as far as possible. The analysis between time domain curve with the frequency range curve can be unified together in low strain reflection method.