基桩低应变法检测浅部缺陷实例分析  

Case Analysis of Detecting Shallow Defects Using Low Strain Method for Foundation Piles

作　　者：王建华 WANG Jianhua(Guangdong Jianke Transportation Engineering Quality Testing Center Co.,Ltd.Guangzhou 510599,China;Guangdong Transportation Infrastructure Intelligent Detection Engineering Technology Research Center Guangzhou 510599,China)

机构地区：[1]广东建科交通工程质量检测中心有限公司,广州510599 [2]广东省交通基础设施智能检测工程技术研究中心,广州510599

出　　处：《广东土木与建筑》2024年第9期114-116,126,共4页Guangdong Architecture Civil Engineering

摘　　要：通过低应变法检测的基本原理和实际工程中的应用,对低应变法检测信号中浅部出现缺陷反射波的情况进行研究。得出在低应变法检测时,灌注桩护筒直径、充盈系数、地质条件都会影响检测结果的准确判定,且检测信号存在缺陷反射波时,宜使用不同质量、材质的激振设备或进行机械滤波来提升采集信号的有效性,并结合开挖、超声波法和钻芯法等不同方法进行判断,以保证基桩完整性类别判定的准确性。Through the basic principle of low strain method detection and its practical application in engineering,this study investigates the occurrence of shallow defect reflection waves in low strain method detection signals.When using the low strain method for testing,the diameter of the pile casing,filling coefficient,and geological conditions can all affect the accurate determination of the testing results.When there are reflected waves with defects in the testing signal,it is advisable to use excitation equipment of different qualities and materials or perform mechanical filtering to improve the effectiveness of the collected signal.Different methods such as excavation,ultrasonic method,and core drilling method should be combined to make judgments to ensure the accuracy of the determination of the integrity category of the foundation pile.

关 键 词：浅部缺陷 低应变法检测 超声波法检测 钻芯法检测 开挖验证 

分 类 号：U443.15[建筑科学—桥梁与隧道工程]