（1 中国建筑科学研究院有限公司， 北京 100013；2 北京珠穆朗玛绿色建筑科技有限公司， 北京 102212）

［摘要］为了研究装配式混凝土结构内部缺陷的检测方法，设计制作了含有不同类型缺陷的装配式混凝土结构用叠合构件，并对试件内部缺陷进行了基于阵列超声和电磁波雷达的无损检测方法试验研究。结果表明：阵列超声法检测得到的结果与试件内部缺陷设计情况吻合度较高，通过不同二维断面成像的分析，可有效识别混凝土内部孔洞、夹杂及脱空等缺陷；当缺陷与测试面间不存在钢筋或钢筋处于内部缺陷边缘且缺陷尺寸较大时，采用电磁波雷达法可有效地定位混凝土构件内部缺陷，但对于非金属类夹杂或孔洞可能会出现漏检情况。与阵列超声法相比，水平投影定位精度偏差较大，通过后处理软件得到的水平二维图像内部缺陷位置及大小的准确性也有待进一步提高。研究结果可为装配式混凝土结构质量控制和验收提供参考和依据。

［关键词］装配式混凝土结构； 内部缺陷； 无损检测； 阵列超声法； 电磁波雷达法

中图分类号：TU375文献标识码：A文章编号：1002-848X(2020)09-0026-06

Experimental study on nondestructive detection test of internal defects of prefabricated concrete structure

ZHANG Jinfeng1, SUN Bin1, MAO Shiyang1, ZHANG Yuzhao2

(1 China Academy of Building Research， Beijing 100013， China；2 Beijing Everest Green Building Technology Co., Ltd.， Beijing 102212， China)

Abstract:In order to study the detection methods of internal defects in prefabricated concrete structures, laminated components for prefabricated concrete structures containing different types of defects were designed and manufactured. The internal defects of the test specimens were tested experimentally using array ultrasonic and electromagnetic wave radar nondestructive detection methods. The results show that the results obtained by the array ultrasonic method are in good agreement with the internal defect design of the test piece. Through the analysis of different two-dimensional cross-sectional imaging, defects such as holes, inclusions and voids in the concrete can be effectively identified; when there is no reinforcement between the defect and the test surface or the reinforcement is on the edge of the internal defect and the defect size is large, the electromagnetic wave radar method can be used to effectively locate the internal defects of the concrete component, but non-metallic inclusions or holes may be missed. Compared with the array ultrasound method, the horizontal projection positioning accuracy has a large deviation, and the accuracy of the position and size of the internal defects of the horizontal two-dimensional image obtained by the post-processing software needs to be further improved. The research results can provide reference and basis for quality control and acceptance of prefabricated concrete structures.

Keywords:prefabricated concrete structure; internal defect; nondestructive detection；array ultrasonic method; electromagnetic wave radar method

*国家重点研发计划项目（2016YFC0701800），中国建筑科学研究院应用技术研究课题（20150112330730050），住房和城乡建设部科技项目（2016-K5-043）。

作者简介：张晋峰，硕士，高级工程师，Email：20588951@qq.com。