堆石料湿化试验变形过程分析

堆石料湿化变形是堆石坝变形的主要组成部分之一。由于堆石料具有流变特性，难以区分堆石料湿化过程中的湿化变形和流变变形。本文采用糯扎渡高心墙堆石坝弱风化花岗岩堆石料，进行了常规三轴试验与饱和湿化三轴试验，对饱和湿化试验中堆石料试样充水饱和过程以及发生的各类变形进行分析。研究表明，在三轴湿化试验中，堆石料试样的充水饱和过程通常会持续一定长的时间。在这个过程中，堆石料试样不仅发生湿化瞬时变形，也会发生一定大小的湿化湿态流变。本文提出了一个进行堆石料饱和湿化试验过程分析的迭代方法，可分离计算在堆石料试样充水饱和过程中所发生的湿态流变的大小，并采用迭代分析后的模型参数，对本文进行的饱和湿化试验进行了定量分析和全过程模拟计算，拟合效果较好，验证了方法的合理性和实用性。

Process analysis of wetting deformation test of rockfill materials

The wetting deformation of rockfill material is the main component of post-construction deformation in earth-rockfill dams. Due to the creep characteristics of rockfill, it is usually difficult to distinguish the wetting deformation and creep deformation during the wetting process of rockfill. In this paper, conventional triaxial tests and triaxial wetting tests were carried out using the weakly weathered granite rockfill of Nuozhadu high earth-rockfill dam, to investigate the deformation characteristics of rockfill specimens during the wetting process. The results show that in the triaxial wetting test, the water-filling process of rockfill specimen usually lasts for a certain period of time. During this process, the rockfill specimen undergoes not only wetting-induced instantaneous deformation but also a certain amount of wet-state creep deformation. This paper presents an iterative method for analyzing the saturated wetting process of rockfill, which can separate and determine the wet-state creep deformation that occurs during specimen wetting. Then, using the model parameters obtained by the iterative method, quantitative analysis and whole-process simulation for the saturated wetting test were carried out. The good fitting effect verifies the rationality and practicability of the proposed method.