孔内组合声波法在桩基完整性检测中的应用研究  

Research on the Application of Borehole Combined Acoustic Wave Method in Pile Integrity Testing

作　　者：李志宏 杨军 李柯柯 LI Zhi-hong;YANG Jun;LI Ke-ke(Guangzhou Airport Construction Investment Group Co.,Ltd.,Guangzhou 510800;Guangzhou Municipal Engineering Testing and Inspection Co.,Ltd.,Guangzhou 510520;Department of Civil Engineering,Tsinghua University,Beijing 100084)

机构地区：[1]广州机场建设投资集团有限公司,广州510800 [2]广州市市政工程试验检测有限公司,广州510520 [3]清华大学土木工程系,北京100084

出　　处：《广州建筑》2024年第8期60-63,共4页GUANGZHOU ARCHITECTURE

摘　　要：针对传统桩基检测方法应用的局限性,本文将孔内声波测井技术应用于桩身缺陷检测,利用高频超声波和低频、高功率超磁致伸缩声波,对钻孔周围不同距离范围内的桩身缺陷和浇筑质量进行定向检测。现场测试表明:孔内组合声波法可应用于桩身完整性检测,依靠孔内多向声波收发技术,该检测方法可定向检测桩身质量,检测结果不受桩长、桩径等参数影响;该方法结合钻芯检测使用,可采用一桩一孔布置,有效克服了钻芯法的“一孔之见”,降低了桩基钻芯检测成本。In response to the limitations of traditional pile foundation detection methods,this article applies borehole acoustic logging technology to pile body defect detection.High frequency ultrasound and low-frequency,high-power magnetostrictive sound waves are used to perform directional detection of pile body defects and pouring quality within different distance ranges around the drilling hole.On-site testing has shown that the application of the borehole combined acoustic wave method in pile integrity detection is feasible.With the help of its own electronic compass,this detection method can directionally detect the quality of the pile body,and the detection results are not affected by parameters such as pile length and diameter.This method,combined with coring extraction detection,can detect one pile through only one borehole,effectively overcoming the"one hole view"of the drilling method and reducing the cost of coring.

关 键 词：桩基检测 超磁致伸缩声波 超声波 灌注桩 素砼桩 

分 类 号：TU473.16[建筑科学—结构工程]