声波透射法采用CBV判据分析桩身混凝土质量

Analysis of Defects in Casting in-situ Pile through CBV Defect-Criterion by crosshole sonic logging Testing

本文对比了声波透射法桩基检测中各种不同判据的优缺点,提出了采用多次逼进拟合法对声测管管距偏移进行修正后得出的CBV判据,并通过试验验证和工程实例表明基于声速的CBV缺陷判据能更加准确地对桩身缺陷进行判别。

This paper compared the advantages and shortages of defect - criterions used in crosshole sonic logging testing of casting in - situ pile. Then it introduced the CBV Defect - Criterion that based on acoustic velocity of pile which came from the correction of the deviation of acoustic pipe - distance by multiple - approach fitting. In the end, the author illustrated that CBV Defect - Criterion can qualify the defects in pile more accurately through experiment and a practical experience.