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中文摘要：
通过对块石路堤不同块石厚度及上覆砂砾石厚度结构情况下块石路基温度场模拟结果的分析,研究了路堤结构、块石内部温度、渗流瑞利数Ra、不同对流模式临界瑞利数Rac的变化及其与路堤冷却效果的关系。结果表明,冬季块石层内空气对流模式是影响块石路堤冷却效果的最关键因素,以保证冬季块石层内空气形成对流模式(1,1)和(2,1)为主的路堤结构对路基具有最佳的冷却效果。该对流模式下,冬季路堤块石层空气能与外界形成大的对流循环,使路基最有效吸收外界冷能,最大限度冷却。
英文摘要：
通过对块石路堤不同块石厚度及上覆砂砾石厚度结构情况下块石路基温度场模拟结果的分析,研究了路堤结构、块石内部温度、渗流瑞利数Ra、不同对流模式临界瑞利数Rac的变化及其与路堤冷却效果的关系。结果表明,冬季块石层内空气对流模式是影响块石路堤冷却效果的最关键因素,以保证冬季块石层内空气形成对流模式(1,1)和(2,1)为主的路堤结构对路基具有最佳的冷却效果。该对流模式下,冬季路堤块石层空气能与外界形成大的对流循环,使路基最有效吸收外界冷能,最大限度冷却。
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