This paper explores the effect of particle rolling resistance on the mechanical behaviour of silty sand under various shearing conditions. The elastic–plastic spring–dashpot rolling resistance model was employed, and drained and undrained triaxial tests were conducted on silty sand with various fines contents and rolling resistance. It was found that the rolling resistance of fines contents had a strong impact on the critical state, peak state, phase transformation state as well as zero-dilatancy state of silty sands. Moreover, depending on the correlation between rolling resistance of coarse and fine particles, fines can positively or negatively contribute to the overall structure of silty sand. Increasing the rolling resistance of fines enhances the liquefaction resistance of silty sands. Thus, the presence of fines of high rolling resistance in the sand can result in a marked decrease in collapsibility or liquefaction susceptibility compared with the presence of fines of lower rolling resistance.

本文探讨了在不同剪切条件下颗粒滚动阻力对粉质砂土力学行为的影响。使用了弹塑性弹簧-阻尼器的滚动阻力模型，并对粉尘含量和滚动阻力各不相同的粉砂进行了排水和不排水的三轴试验。研究发现，细粉含量的滚动阻力对粉砂的临界状态，峰状态，相变状态以及零膨胀状态有很大影响。而且，取决于粗颗粒和细颗粒的滚动阻力之间的相关性，细粉可对粉砂的总体结构产生正面或负面的影响。增加细粉的滚动阻力可提高粉质砂的抗液化性。从而，