高、低应变法在基桩完整性检测中的对比分析

A Comparison Study Between High Strain Method and Low Strain Method on Pile Integrity Testing

高、低应变法检测基桩完整性具有相同的理论基础,但是由于输入能量的不同,它们在波速、衰减特性、缺陷定位能力以及判定缺陷程度可靠性等方面存在着一定的差异。本文从理论上分析了产生这些差异的原因,同时结合一些典型案例,说明了两者在基桩完整性的检测中各有优缺点,可以相互补充。

Though the basic theory of high strain method and low strain method on pile integrity testing are the same. Because the inputting energy of which are not on the same level, they also have differences on some aspects such as wave speed, attenuation characteristic, the ability of locating defects and the reliability of judging the extent of defects. The reasons which caused these differences are discussed in this paper. At the same time, some typical cases are analyzed. It is indicated that the two methods each have their advantages and disadvantages, they can complement each other.