嵌岩桩加固补强效果检测

Testing of reinforcement effect of rock-socketed piles

针对嵌岩桩加固后是否达到要求的问题,提出通过比对加固前后的反射波及其小波分解各频带的波形和动刚度的变化,并将其与正常桩的波形和动刚度对比,必要时用静载荷试验或钻芯法验证的方法检测加固效果.结合工程实例,证实本方法的可行性,并能取得很好的效果.研究表明,加固后,原缺陷在反射波及其小波分解各频带的波形上无反映,动刚度值在正常范围时,可认为加固效果良好.

In order to study the reinforcement effect of the rock-socketed piles,through deeply investigating the changes of the reflected curve and its independent wavelet decomposition frequency bands and the dynamic stiffness before and after reinforcement,and comparing the reflected curve and its independent frequency bands and the dynamic stiffness after reinforcement with those of the perfect piles under the same conditions,validating with static load testing or core drilling method if necessary,the analysis and qualitative evaluation on the reinforcement effect of rock-socketed piles were carried out.Based on the practical examples,the feasibility of this method was proved and very good results can be achieved.The results show that the reflection of the original defects in the reflected wave is disappeared with the dynamic stiffness in the normal range,can be considered a good reinforcement effect.