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根据西北口面板堆石坝混凝土面板温度应力计算成果，结合观测资料显示的面板裂缝的特征，讨论了垫层料对混凝土面板的约束情况，提出了不同于大坝混凝土的强弱约束概念。
According to the calculation results of temperature stress of concrete slab in Northwest Face Concrete Face Rockfill Dam and the characteristics of face slab cracks observed by observational data, the restraint condition of concrete slab with cushion material is discussed and the concept of strength constraint different from that of dam concrete is proposed.