观音岩大坝高温季节高低温时段混凝土温控影响研究  

Study on Influence of Guanyinyan Dam Concrete Temperature Control between High and Low Temperature Period in High Temperature Season

作　　者：张磊[1] 李小群 张宏 赵红卫 刘英强 ZHANG Leit LI Xiaoqun ZHANG Hong ZHAO Hongwei LIU Yingqiang(State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin, China Institute of Water Resources and Hydropower Research, Beijing 100038, China Datang Guanyinyan Hydropower Development Co., Ltd., Kunming 650011, Yunnan, China)

机构地区：[1]中国水利水电科学研究院流域水循环模拟与调控国家重点实验室,北京100038 [2]大唐观音岩水电开发有限公司,云南昆明650011

出　　处：《水力发电》2017年第1期35-37,47,共4页Water Power

基　　金：国家自然科学基金资助项目(50909105);国家重点研发计划项目(2016YF0201000);水利部行业公益科研专项(200801007);中国水科院院专项项目资助

摘　　要：通过研究观音岩水电站夏季高温时段和低温时段不同气候条件对碾压混凝土温控的影响,探讨混凝土施工过程的精细化控制。首先,采用解析法研究机口到入仓过程低温和高温时段温度回升情况;然后通过精细化的仿真计算,模拟碾压施工的过程,考虑日气温变化,研究入仓到浇筑过程气候差异对混凝土最高温度的影响。结果表明,相同浇筑温度下,浇筑过程的日气温变化对混凝土内部最高温度的影响仅有0.4℃,而运输过程高温和低温时段混凝土温度回升值可相差6℃。因此高温季节重点是通过优化控制运输环节辅以改善仓面小气候等措施,混凝土温度回升最大可以改善6℃左右,最高温度最多能降低2~3℃。The temperature control influence for RCC pouring of Guanyinyan Hydropower Station between high and low temperature period in summer is studied to discuss the fine construction control of RCC. Firstly, the temperature rises at low and high temperature periods in concrete transportation process from mixer to pouring surface are researched by analytical method. Secondly, the process of rolling construction is finely simulated and the influence of climate difference in pouring stage on highest temperature of concrete is studied after considering air temperature change. The results show that the influence of daily temperature change on highest temperature of internal concrete in pouring stage is only 0.4 ℃, but the influence in transportation process can achieve 6 ℃. Therefore, the maximum temperature rise of concrete can be improved by about 6 ℃and the highest temperature can be reduced about 2℃ - 3 ℃ by controlling concrete transportation process and improving pouring surface mieroclimate in high temperature season.

关 键 词：碾压混凝土 干热河谷 温控防裂 观音岩水电站 

分 类 号：TV315[水利工程—水工结构工程]