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利用Ansys/Ls-Dyna3D软件建立振动压路机振动碾压土壤过程的三维模型,对振动压实过程进行仿真分析和试验研究,计算的结果满足工程精度要求,土壤表层沉降量和土壤竖向应力误差在10%以内,可用于指导施工。研究表明,在振动压实过程中,土壤的竖向应力沿轮宽方向对称分布,在距轮缘1/5~1/4处竖向应力衰减明显,提出施工中宜取1/5~1/4轮宽作为振动压实重叠宽度的建议,并据此进行试验,结果显示压实12遍后土壤压实度极差仅为0.6%,压实度均匀性较好。
The three-dimensional model of vibration compaction process of vibratory roller was established by Ansys / Ls-Dyna3D software. The vibration compaction process was simulated and tested. The calculated results satisfied the requirements of engineering precision. The soil surface subsidence and soil vertical stress error were in the range of Less than 10%, can be used to guide the construction. The results show that in the process of vibrating compaction, the vertical stress of soil distributes symmetrically along the wheel width direction, and the vertical stress attenuation is obvious at 1/5 ~ 1/4 from the rim. It is suggested that 1/5 ~ 1 / 4 wheel width as the vibration compaction width of the proposed overlap, and based on the test results show that compaction 12 times after the poor soil compaction degree of only 0.6%, better compaction uniformity.