堆石料蠕变模型及参数求取

通过大型三轴蠕变仪对两河口水电站混合料的蠕变特性进行试验研究,对其蠕变机理和模型进行探讨。结果表明两河口水电站混合料的轴向和体积蠕变可以用幂函数来描述,轴向初始蠕变和轴向蠕变指数与轴向主应力差关系可用幂函数表示;体积初始蠕变与平均主应力成线性关系,体积蠕变指数与平均主应力成幂函数关系。模型参数可通过蠕变特性试验确定,最后对模型参数的影响因素进行了分析。

The research of rockfill creep model and parameters

In this paper,experimental research is conducted on the creep characteristics of the mixture of Lianghekou Hydropower Station through three axis creep apparatus. The creep mechanism and model are discussed. The axial and volumetric creep of the mixture of Lianghekou Hydropower Station can be described by a power function. The initial axial creep and axial creep index could be represented by a power function with the axial stress difference;the volume of the initial creep and the average principal stress is linear and volumetric creep index and average principal stress are a power function relationship. Determination of creep model parameters can be obtained by experiment,and the factors which influence the model parameters were analyzed.