服役期水工混凝土主动控温系统设计研究  

Research and design of active temperature control system for hydraulic concrete in service period

作　　者：吴正桥[1] 卢晓春[2] 陈博夫 吕从聪 杜彬 WU Zhengqiao;LU Xiaochun;CHEN Bofu;LV Congcong;DU Bin(China Water Resources Beifang Investigation,Design and Research Co.Ltd.,Tianjin 300222;College of Hydraulic and Environmental Engineering,China Three Gorges University,Yichang,Hubei 443002;Yichang Tianyu Science and Techology Co.,Ltd.,Yichang,Hubei 443002)

机构地区：[1]中水北方勘测设计研究有限责任公司,天津300222 [2]三峡大学水利与环境学院,湖北宜昌443002 [3]宜昌天宇科技有限公司,湖北宜昌443002

出　　处：《水力发电学报》2021年第11期83-90,共8页Journal of Hydroelectric Engineering

基　　金：国家自然科学基金面上项目(51879145);国家自然科学基金青年科学基金项目(52009068)。

摘　　要：针对服役期水工混凝土在“早期控温、后期保温”措施下温度不可控的现状,为减小表层混凝土内外温差,预防温度裂缝的发生,提出了对服役期水工混凝土进行主动控温的方法,考虑到调控过程中涉及的温湿耦合问题,以温湿应变最小原则为衡量标准,就控温系统中的控温管道埋设深度、间距及调控温度等进行了研究。研究结果表明主动控温能够有效减小环境温度骤降带来的不利应变,同时调温管道埋设深度与间距在0.3 m左右,调控温度在最大温度降幅36.5%时,调控过程中的温湿应变最小,控温效果最佳。Temperature of hydraulic concrete in service period is not controllable under the measures of early temperature control and later thermal insulation.To reduce the temperature gradient near a concrete surface and prevent temperature cracking,we develop a method for active control of hydraulic concrete in service period.We construct a temperature control system and examine the buried depth and spacing of its temperature control pipelines and its regulated temperature,considering temperature-humidity coupling in the regulation and applying a measure based on the principle of minimizing temperature-humidity strain.The results show active temperature control can effectively reduce the adverse strain caused by a sudden drop in ambient temperature.And the best temperature control effect and lowest temperature-humidity strain are achieved at a buried depth of 0.3 m,pipe spacing of 0.3 m,and a regulated temperature drop up to 36.5%.

关 键 词：主动控温 水工混凝土 调温管道 温湿应变 

分 类 号：TV431[水利工程—水工结构工程]