低应变检测管桩局限性及联合孔内摄像判定完整性研究  

Study on the Limitations of Low Strain Detection of Pipe Piles and Integrity of Combined Camera Through the Hole Determination

作　　者：刘洋洋 LIU Yangyang(Shenzhen Gangjia Engineering Test&Inspection Co.,Ltd.)

机构地区：[1]深圳市港嘉工程检测有限公司

出　　处：《广东建材》2024年第8期75-77,共3页Guangdong Building Materials

摘　　要：预应力混凝土管桩应用普遍,质量检测内容为完整性与承载力。低应变法作为检测桩身完整性的普查方法,有高效、检测周期短的优点,但是低应变法无法对竖向裂缝有效的识别,对工程是一种极大的质量隐患。因此本文探讨了低应变法的局限性与孔内摄像技术的优点,将两种方法进行对比与结合,提出了在已知低应变法判定结果的前提下,采用孔内摄像技术进一步确定桩身综合完整性类别的方法。对桩身竖向裂缝排查检和检测提供了保障。The application of prestressed concrete pipe piles is widespread,and the quality inspection content includes integrity and bearing capacity.The low strain method,as a survey method for detecting the integrity of pile bodies,has the advantages of high efficiency and short detection period.However,the low strain method cannot effectively identify vertical cracks,which is a great quality hazard to engineering.Therefore,this article explores the limitations of the low strain method and the advantages of borehole imaging technology.By comparing and combining the two methods,a method is proposed to further determine the comprehensive integrity category of the pile body using borehole imaging technology,given the known results of the low strain method.It provides assurance for the inspection and detection of vertical cracks in the pile body.

关 键 词：预应力混凝土管桩 桩身完整性 孔内摄像 竖向裂缝 局限性 

分 类 号：TU473.1[建筑科学—结构工程]