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以土石坝黏土心墙料为研究对象,结合工程实际情况,考虑不同固结围压对黏土心墙料动力特性的影响。通过循环振动三轴试验,对黏土心墙料在选定的5组固结围压状态下表现出来的动力特性进行研究,得出固结围压的变化对其产生的影响。在研究的固结围压范围内,固结围压对动弹性模量的影响较大,动弹性模量随固结围压的增大而提高;最大动弹性模量与平均主应力间具有良好的幂函数关系,随着平均主应力的增大呈指数增长;阻尼比曲线与动剪模量比曲线在不同的固结围压状态下表现出了良好地归一化特性。
With the core material of clay dam as the research object, considering the actual engineering conditions, the influence of different consolidation confining pressure on the dynamic characteristics of the clay core wall material is considered. Through the cyclic vibration triaxial test, the dynamic characteristics of the clay core wall material under the condition of the selected five groups of consolidation confining pressure are studied, and the influence of the consolidation confining pressure on it is obtained. In the range of confining confining pressure studied, the confining confining pressure has a greater influence on the dynamic elastic modulus, and the dynamic elastic modulus increases with the consolidation confining pressure increasing. The maximum dynamic elastic modulus and the average principal stress have The good power function relationship increases exponentially with the increase of the average principal stress. The damping ratio curve and the dynamic shear modulus ratio curve show good normalization characteristics under different consolidation confining pressures.