大体积混凝土仓面智能喷雾控制模型

Intelligent spray control for the concrete curing of mass concrete bins

水电工程外界环境复杂,许多大坝的坝址具有大风、干热和强日照等复杂多变的气象条件,气候条件和地理位置的特殊性决定了必须突破常规的大坝混凝土仓面环境监控模式,才能满足大坝高质量建设的需要。为了更好地调节仓面气候,加强对温控施工的管控,减少危害性裂缝的产生,该文提供一套仓面气候自动控制系统。该系统在试验的基础上建立仓面外环境温度、设备和仓面小环境关系模型,以及仓面内外环境温度和混凝土温度的回升关系模型。基于该模型以及改进的智能化控制的喷雾设备,实现浇筑过程中根据浇筑要求、外界环境温度,调节喷雾机的喷雾强度、开关,从而实现仓面气候的自动调节,控制混凝土浇筑温度和仓面湿度在合理范围内。

The external environment around hydropower projects is very complex. Many dam sites have complex, variable meteorological conditions, such as strong winds, dry heat and intense sunshine. The particular climate and geographical conditions require changes to the conventional monitoring method for individual concrete dam surfaces to provide high-quality dam construction. The concrete environment, especially the temperature, needs to be carefully controlled during construction to reduce the occurrence of harmful cracks. This paper describes an automatic control system for mass concrete climate control. Experimental data was used to develop a model that related the outside environmental temperature and the equipment characteristics to the concrete surface conditions with another model to relate the temperatures inside the concrete to the concrete surface temperature. These two models were then used to design intelligent spray equipment for use during the pouring process that adjusts the spray intensity based on the pouring requirements and the ambient temperature to automatically control the concrete climate to give the correct concrete temperature and humidity ranges.