中文摘要：

填料性质是影响土石混填路基压实效果的主要因素。本文用离散元程序PFC^2D建立土石混合料振动压实模型，从颗粒粗糙度、颗粒刚度、最大粒径、含石量对土石混合料压实效果进行分析。结果表明：以压实度为指标控制土石混填路基压实质量时，必须用最大粒径、含石量对标准干密度修正。研究弥补了宏观试验无法反应的微观问题，对工程实践有重要的指导意义。

英文摘要：

The filler of earth-rock subgrade affect its characteristic largely .The paper developed a vibration compaction model by PFC 2D to research different factors how to influence on the compaction for earth -rock subgrade.The factors include roughness , stiffness, the maximum size of aggregate and the content of rock .The results told that it＇s necessary to develop the maximum dry density prediction model respectively based on both maximum diameter and the content of stone when controlling compaction quality though degree of compaction .It helps to illustrate micro characteristics which can be gotten by macro experiments .