本文根据小浪底排沙洞预应力出口闸室结构模型试验,对模型混凝土配合比设计方法和技术进行了试验研究.结果表明,经过仔细设计,可使模型混凝土的力学变形性能基本上与原型混凝土相同或相近(这是常用的石膏等材料难以做到的).该项研究成果对钢筋混凝土和预应力钢筋混凝土结构模型试验具有一定的参考价值. In this paper, based on the structural model test of prestressing outlet lock chamber of sand discharge tunnel in Xiaolangdi station, the experimental research on the design method and technology of model concrete mix ratio is carried out. The results show that after careful design, the mechanical deformation performance of model concrete is basically the same as that of prototype concrete Or similar (which is difficult to do with commonly used materials such as gypsum) .The results of this study have some reference value for the model test of reinforced concrete and prestressed reinforced concrete structures.