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针对官地水电站大坝碾压混凝土施工冬季内部温度较高、内外温差偏大、存在开裂风险的问题,采用有限元法对官地大坝的施工过程进行了数值模拟,重点研究其二期冷却过程中的温度控制及应力控制问题。仿真分析结果表明,采用新的保温措施和通水冷却方案后,大坝混凝土的内部温度可降至22℃以下,可正常蓄水;在整个二期冷却过程中,大坝混凝土约束区部位的最大温度应力为1.54MPa,满足混凝土的应力控制标准,说明该工程二期冷却过程是可控的,所设计的温控方案可行。
Aiming at the problem that the interior temperature of dam RCC construction in Guandi Hydropower Station is high in winter and the temperature difference between inside and outside is large, there is a risk of cracking. The construction process of Guandi Dams is numerically simulated by finite element method. Process temperature control and stress control issues. The simulation results show that the internal temperature of the dam concrete can be reduced to less than 22 ℃ after the new insulation measures and the water-cooling scheme are adopted. During the entire second-stage cooling process, the dam concrete confinement area Maximum temperature stress of 1.54MPa, to meet the concrete stress control standards, indicating that the second phase of the project cooling process is controlled, the design of the temperature control program feasible.