混凝土灌注桩桩身完整性的精细化复测和定量化评估

The Refined Retest and Quantitative Evaluation for the Integrity of Concrete Cast-in-Situ Piles

声波透射法检测混凝土灌注桩桩身完整性,当采用钻芯法进行验证检测且结果与声测法不一致时,如何进行综合分析相关规范未有具体规定。论文提出了精细化复测和定量化评估的方法:将钻芯孔和声测管组成新的声测管体系,进行声波法精细化复测,根据复测结果描绘出缺陷的轮廓线,确定缺陷的大概范围,估算出缺陷的面积和桩身完整性系数,最终给出该桩的综合分析结果,为设计复核和工程验收提供参考。

The acoustic transmission method is used to detect the integrity of the concrete cast-in-situ piles.When the drill core method is used to verify and test and the results are inconsistent with the acoustic measurement method,there is no specific specification on how to conduct comprehensive analysis.This paper proposes a method of refined retest and quantitative evaluation:the core hole and the acoustic pipe form a new acoustic pipe system,the refined retest of the acoustic transmission method is carried out,the contour of the defect is drawn according to the retest result,and the approximate range of the defect is determined through the contour,the area of the defect and the integrity factor of the pile are estimated,and the comprehensive analysis result of the pile integrity is finally given to provide basis for design review and engineering acceptance.