采用最小二乘法原理和1stopt工具箱方法对青银高速公路济南黄河三桥混凝土构件实测超声波声速值、回弹值和强度值进行回归分析,分析各相关数据的变化规律并对其进行拟合,得出该桥梁混凝土构件超声回弹综合测强专用曲线;通过抽样试验验证了该曲线的准确性,为该桥梁后期混凝土构件强度测定提供了一种快速、间接的无破损检测方法。 The least square method and 1stopt toolbox method were used to regression analysis of the measured ultrasonic sound velocity, springback value and intensity of the concrete member of Jinan-Yellow River Third Bridge of Qingyin Expressway, the variation regularity of each relevant data was analyzed and fitted, The concrete curves of ultrasonic rebound comprehensive strength measurement of concrete components of the bridge were obtained. The accuracy of the curves was verified by the sampling test, which provided a rapid and indirect nondestructive testing method for the strength measurement of the concrete members in later stage of the bridge.