声波透射法判定基桩质量方法的改进及试验研究

IMPROVING THE METHOD OF JUDGING THE QUALITY OF PILE BY CROSSHOLE SONIC LOGGING AND INVESTIGATION

通过分析目前声波透射法检测基桩混凝土质量并判定基桩完整性类别时存在的不足,提出一种改进方法。根据对试验模型桩的检测分析,结果表明:采用声波透射法检测基桩混凝土质量时,对基桩的完整性类别进行定量化划分具有可行性。改进后的完整性系数β不仅能够准确探测缺陷的存在,而且还能够对不同严重程度的缺陷作出区分,缺陷越严重,则β值越小。β值同缺陷的严重程度具有很好的相关性,对缺陷严重程度的反应较为准确。

The disadvantage of detecting and judging the quality of pile by crosshole sonic logging is studied and analysed,a new method is put forward.According to the test results,the paper analyses the feasibility of judging the integrality grade of pile by crosshole sonic logging.The integrality coefficient β can not only detect the defect of pile but also distinguish the degree of the defect.The β has a good relativity with the defect.it can respond to the defect truly.