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在扼要分析堆石料主要力学特性的基础上,在亚塑性理论框架内,采用扩展的Gudehus-Bauer亚塑性模型对堆石料因含水率发生变化引起的湿化行为进行建模预测。扩展模型除能考虑含水率对颗粒硬度的影响外,还能反映土体密实度、应力状态和含水率等对堆石料非线性和非弹性变形的影响。将该模型应用于心墙坝初次蓄水时应力变形的亚塑性计算分析中。结果表明,扩展模型能较合理地反映心墙堆石坝的湿化变形规律。
Based on a brief analysis of the main mechanical properties of rockfill materials, an extended Gudehus-Bauer sub-plasticity model was used to predict the wetting behavior of rockfill materials due to the change of water content within the framework of the sub-plasticity theory. In addition to considering the influence of moisture content on particle hardness, the extended model can also reflect the influence of soil compaction, stress state and moisture content on the nonlinear and inelastic deformation of rockfill materials. The model was applied to the sub - plastic calculation and analysis of stress and deformation during the initial impoundment of core dam. The results show that the extended model can reasonably reflect the wet deformation of core rockfill dam.