碾压混凝土坝精细数字化施工质量控制

郑祥 米元桃

摘 要：针对传统碾压混凝土坝施工常规工艺和质量控制技术存在的不足，依托乌弄龙水电站碾压混凝土筑坝施工工艺，基于数字化在线馈控技术方案，开发了仓面碾压热层密实性关联参数采集仪器及变态混凝土智能型加浆与振捣施工设备组合施工工艺，构建了碾压混凝土压实质量评价模型及变态混凝土振捣质量评价模型，基于云服务平台开发了相应工艺效果实时馈控系统，形成了碾压、注浆及振捣三位一体的集成化质量管控方法，实现了碾压混凝土施工质控精细化，工程实践应用效果显著。

关键词：碾压混凝土坝;精细化施工;质量控制;数字化;乌弄龙水电站

Abstract：Aiming at the shortcomings of conventional process and quality control technology in the construction of traditional roller compacted concrete （RCC） dam， relying on the construction of Wunonglong RCC Dam， based on the digital online feedback-control technology scheme， firstly， the acquisition instruments of the density parameters of compacted layers and the combined construction process of intelligent grout and vibration construction equipment for the metamorphic concrete were developed. Secondly， the evaluation models of compaction quality of RCC and vibration quality of the metamorphic concrete were established. Thirdly， the real-time feedback-control system of the corresponding process effect had been developed based on the cloud service platform， thus， the integrated quality control method of compaction， grout and vibration was formed. The fine quality control during RCC construction was realized， and the application effect of engineering practice was remarkable.

Key words： roller compacted concrete dam; lean construction; quality control; digitalization; Wunonglong Hydropower Station

碾压混凝土（RCC）重力坝具有施工简单、胶凝材料用量少、不设纵缝（也可少设或不设横缝）、施工导流容易、工程造价低等优点，在水利水电工程中应用极为广泛。以薄层通仓碾压为特点的碾压混凝土筑坝技术，碾压作业施工质量控制是筑坝成功的关键，对大坝成型质量有重要影响。目前，施工现场主要采用核子密度仪法实时检测碾压热层压实质量[1]，但这种通过少量随机取点测值代表全仓面压实质量的方法可靠性低、表征性差，且测量过程繁琐、测值结果不稳定;此外，对碾压混凝土坝变态区域注浆及振捣作业没有严格量化可行的质量评价方法[2]。因此，针对现有施工工艺难以满足碾压混凝土快速施工精细化控制要求的现状，深入研究碾压混凝土坝施工精细数字化馈控技术，对提高施工质量、加快施工进度、节约工程成本具有重要的工程应用价值。……