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针对堆石料浸水后的湿化变形并不是瞬时产生,而是一个渐进发展过程,建议将湿化变形进行时变计算。首先采用Prandtl-Reuss流动法则推导了湿化剪切应变分量,然后叠加湿化体积应变分量,获得三维湿化应变分量;通过分析三维湿化应变分量和单轴应力状态下的湿化应变的关系,指出有关文献推导的三维湿化应变分量计算公式不严谨;然后类比于堆石料流变变形计算公式,推导了湿化变形时变计算公式。实例分析表明,湿化引起坝顶沉降随时间逐渐增大,变形稳定的时间与湿化变形速率呈反比关系。
Aiming to the wet deformation after flooding of rockfill material is not instantaneous, but a gradual development process, it is recommended to make wetting deformation time-varying calculation. First, the wetting shear strain component is deduced by the Prandtl-Reuss flow rule, and then the wetting volume strain component is superimposed to obtain the three-dimensional wetting strain component. By analyzing the relationship between the three-dimensional wetting strain component and the uniaxial stress wetting strain It is pointed out that the formulas for calculating the three-dimensional wetting strain components deduced from the literature are not rigorous. Then, the formula for calculating the time-varying of wetting deformation is deduced by analogy with the formula of rheological deformation of rockfill. The case study shows that the wet settlements cause the crest settlement to gradually increase with time, and the time of deformation stability is inversely proportional to the wetting deformation rate.