本文介绍了水下不分散混凝土新技术在面积大、厚度薄、施工干扰大的三百门水闸除险加固工程应用中 ,原材料的质量、混凝土生产过程、混凝土质量及施工工艺的控制、检测手段。结果证明 :水下不分散混凝土在该工程的应用是成功的 ,质量控制手段是有效的 ,工程全部质量指标达到或超过设计要求。 This paper introduces the new underwater non-dispersive concrete technology in the area of ​​?? large area, thin thickness, large construction interference Sanjiang sluice reinforcement project application, the quality of raw materials, concrete production process, concrete quality and construction process control, detection methods . The results show that the application of underwater undispersed concrete in this project is successful and the quality control measures are effective. All the quality indexes of the project meet or exceed the design requirements.