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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℃。
By studying the influence of different climate conditions on the temperature control of roller compacted concrete at Guanyinyan Hydropower Station during summer and at low temperature, the fine control of concrete construction process is discussed. First of all, the analytical method was used to study the temperature rise during the low temperature and high temperature periods from the machine mouth to the warehousing process. Then, through elaborate simulation calculation, the process of roller compaction was simulated, the daily temperature change was considered, The effect of the highest temperature. The results show that under the same pouring temperature, the influence of daily temperature during pouring on the maximum internal temperature of concrete is only 0.4 ℃, while the temperature rise of concrete during transport can differ by 6 ℃. Therefore, the focus of the hot season is through the optimization and control of transport links to improve the microclimate and other measures, the maximum temperature of concrete can be improved about 6 ℃, the maximum temperature can be reduced by 2 ~ 3 ℃.