低应变反射波法检测桩基浅部缺陷的效果分析

Effect and Analysis of Detecting Shallow Defective Pile with Low Strain Reflected Wave Method

基于低应变动反射波法的基本原理,结合工程实例,介绍了工程中常见的浅部缺陷桩,并详细分析了实际检测工作中典型的浅部缺陷桩的低应变反射波曲线。分析了桩身浅部缺陷产生的原因,并根据大量的实测资料,归纳了检测中经常遇到的各种浅部缺陷桩的波形特征和技术要点,以提高检测准确率,为合理利用低应变法进行桩基检测提供参考。

This paper briefly introduces the basic principle of the low strain dynamic testing method,and combining with the project example,introduces the shallow defective foundation pile in project commonly found,and detailedly analyzes the low strain reflected wave curve of the typical shallow defective foundation pile in the actual testing work.In addition,it analyzes the causes of the shadow defects.According to a lot of measured data,the waveform characteristics and technical points of various common defective piles in detection are summarized to improve detection accuracy,which provides reference for reasonable application of the low strain method in pile foundation detection.