Numerical Simulation of Vibration Compaction Behavior of Soil Subgrade in Highway
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.
万方数据
维普
