考虑冷却水效应的闸墩混凝土施工期温度场研究  

Research on temperature field of gate pier concrete during construction period considering the effect of cooling water

作　　者：张朋军 付有洪 李金磊 ZHANG Peng-jun;FU You-hong;LI Jin-lei(The Third Engineering Co.,LTD of China Railway Seventh Group,Xian 710032,China;North China University of Water Resources and Electric Power,Zhengzhou 450045,China)

机构地区：[1]中铁七局集团第三工程有限公司,西安710032 [2]华北水利水电大学,郑州450045

出　　处：《广西水利水电》2021年第5期9-12,共4页Guangxi Water Resources & Hydropower Engineering

摘　　要：温度变化对于大体积混凝土结构施工期的安全至关重要。在大体积混凝土内部埋设冷却水管是最有效的温控防裂措施,这就很有必要对埋设冷却水管结构的温度场进行分析研究。本文基于大体积混凝土温度场理论,针对采用冷却水管进行控温的闸墩,采用有限元热流耦合法模拟冷却水管的作用,对闸墩混凝土施工期三维温度场进行了仿真分析。分析表明,研究所采用的冷却水方案是可行的,能够有效地降低温度场峰值、减小混凝土内外温差、控制混凝土浇筑初期的温度,达到减少甚至消除结构裂缝的目的。Temperature change is very important for the safety of mass concrete structures during construction period.Embedding cooling water pipes inside the mass concrete is the most effective temperature control and crack prevention measure.It is necessary to analyze and study the temperature field of the mass concrete structures with embedded cooling water pipe.Based on the theory of mass concrete temperature field,finite element heat flow coupling method was adopted to simulate the effect of cooling water pipe.The three-dimensional temperature field of the gate pier concrete during the construction period was simulated.The results of analysis demonstrate the adopted cooling water scheme is feasible,able to effectively lower the peak of temperature field,reduce the temperature gradient between inside and outside of concrete,control the temperature at the initial stage of concreting construction,and achieve the purpose of reducing or even eliminating the structural crack.

关 键 词：闸墩 冷却水管 热流耦合 温度场 温控防裂 

分 类 号：TV322[水利工程—水工结构工程]