Vibratory roller compaction is a well-known method in improving the mechanical properties of field rockfills. However, the meso mechanism of rockfill densification under vibratory roller compaction has not been understood clearly. This paper presents a discrete numerical method to simulate the vibratory roller compaction of field rockfills. Firstly, rockfill particles were modeled by irregular and stochastic clusters, which can be breakable. In addition, the segregation of field rockfills was replicated in a practical manner. Then, a new model of the vibratory roller was presented, in which the frame inertia was considered. Finally, the developed method was applied to simulate the vibratory roller compaction of field rockfills in the Shui Buya Project. Results show that (1) the numerical simulations of vibratory roller compaction of field rockfills agree well with the field experiments; thus, the feasibility and rationality of the developed simulation method are verified; (2) the dynamic response of field rockfills under vibratory roller compaction can be predicted by the presented numerical method with calibrated model and parameters; (3) the new roller model with frame inertia considered is much more accurate than the roller models in early studies. Thus, the developed discrete numerical method can be further adopted to explore the meso mechanism of rockfill densification under vibratory roller compaction in the future.

中文翻译：

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田间堆石场振动压路机压实的离散模拟

振动压路机压实是一种改善现场堆石场机械性能的众所周知的方法。然而，在振动压路机压实下堆石致密化的细观机理尚不清楚。本文提出了一种离散数值方法来模拟现场堆石场的振动压路机压实。首先，堆石颗粒是由不规则的随机簇模拟的，这些簇可能是易碎的。另外，野外堆石场的隔离以实用的方式进行了复制。然后，提出了一种新的振动辊模型，其中考虑了框架惯性。最后，将所开发的方法应用于Shui Buya项目中现场堆石料的振动压路机压实模拟。结果表明：（1）现场堆石料振动压实的数值模拟与现场试验吻合良好；从而验证了该仿真方法的可行性和合理性。（2）采用标定模型和参数的数值方法，可以预测振动压实过程中现场堆石料的动力响应。（3）考虑到框架惯性的新滚子模型比早期研究中的滚子模型要精确得多。因此，将来可以进一步采用改进的离散数值方法来探讨振动压实下堆石致密化的细观机理。（2）采用标定模型和参数的数值方法，可以预测振动压实下现场堆石料的动力响应。（3）考虑到框架惯性的新滚子模型比早期研究中的滚子模型要精确得多。因此，将来可以进一步采用改进的离散数值方法来探讨振动压实下堆石致密化的细观机理。（2）采用标定模型和参数的数值方法可以预测振动压实过程中场堆石料的动力响应。（3）考虑到框架惯性的新滚子模型比早期研究中的滚子模型要精确得多。因此，将来可以进一步采用改进的离散数值方法来探讨振动压实下堆石致密化的细观机理。