采用阵列超声成像技术对双面叠合剪力墙结构进行无损检测，发现检测成像结果的目标对象深度与其实际深度存在较大误差。通过有限元仿真分析误差成因，发现检测深度误差是由后浇混凝土与两侧预制混凝土内部声速间的差异造成的，且可采用射线跟踪技术来改善检测结果。浇筑了强度不同的双层混凝土试块进行阵列超声成像检测，进一步确认深度检测误差和成因，发现原检测误差达10%以上；采用射线跟踪技术来改善成像结果，其误差小于3%。上述结果对双面叠合剪力墙内部的阵列超声成像检测具有指导意义，可以根据具体检测精度需求进行选择，对于高精度检测项目，可采用射线跟踪技术对采集到的数据进行后处理，以减小深度检测误差，提高检测精度。

Nondestructive testing of double-sided superimposed shear wall structures was carried out by array ultrasonic imaging technology. It was found that there existed large errors between the depth of targeted object and the actual depth. The causes of the error were analyzed by theory and finite element simulation. The results showed that the error was caused by the difference between the strength of the postcast concrete and that of the precast concrete on both sides, and the ray tracking technology can be used to improve the detection results. The double-layer concrete test blocks with different strengths were poured, and array ultrasonic imaging was carried out to further confirm the detection errors and causes. It was found that the detection errors were more than 10%. Ray-tracking technology was used to improve imaging results, with an error of less than 3%. The above results had guiding significance for array ultrasonic imaging detection in double-sided superimposed shear walls.