桩的旁孔透射波法检测技术进展与应用实例

综述了旁孔透射波法检测技术的研究与应用进展,重点阐述了桩身缺陷的检测分析原理,认为对于顶部裸露的在建工程桩,由桩身透射到旁孔的弹性波路径短、干扰小且能反映缺陷以下桩身质量及桩底位置的信息,比常用的反射波法能够更为全面可靠地评价基桩质量状况,并以一个工程实例说明了技术的具体应用过程,结果表明,其实测信号明晰,能够反映缺陷以下桩身的质量信息。

Progress of parallel seismic testing for piles ans a case study

This paper briefly reviews the research and application progress of parallel seismic testing, focusing on the principle of detection of defects in pile shafts. It is considered that for piles under construction with an exposed top shaft, parallel seismic testing can provide a more comprehensive and reliable evaluation of the pile quality as compared with the conventional reflected wave method, because it has a shorter wave propagation path and lower interference, and can provide additional information on the quality of the pile shaft below the defect position and the location of the pile bottom. A case study was performed to show the application process of parallel seismic testing. The results show that measured signals of parallel seismic testing are clear and can reflect information on the quality of the pile part below the defect position.