ABAQUS software was applied to simulate vibration compaction process of the roller.The dynamic response and variation of compaction degree were studied under various rolling mode,rolling combination,loose paving thickness D and velocity of roller V.The result shows that the order of the maximum vertical stress(S33)max and the vertical displacement(U3)max under different rolling methods is that strong vibration＞weak vibration＞static compaction,and(S33)max remains unchanged with increase of rolling number N while(U3)max and K increase rapidly when N=1.The rolling combination has little effect on the volumetric stress p of subgrade soil under different rolling modes.It has remarkable on vertical displacement U3 of subgrade soil.The vertical displacement percentage P and the compactmess K values of subgrade soil with different loose paving thickness under combination 1 are greater than those of rolling combination 2.Under different combinations,P,K values are the largest when D=40 cm.The rolling combination and the rolling speed have significant influence on P and K under the given loose paving thickness.When the rolling velocity is smaller,P and K are larger,but the difference between P and K in combination 1 is more significant than that in combination 2.
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