考虑细观单粒强度的堆石料破碎特性研究

迟世春; 王峰; 贾宇峰; 李士杰

doi:10.11779/CJGE201510005

考虑细观单粒强度的堆石料破碎特性研究 English Version

大连理工大学海岸与近海国家重点试验室，辽宁大连 116024

基金项目: 国家自然科学基金项目（51179024,51379029）

详细信息

作者简介:
迟世春（1964- ），男，山东高密人，教授，博士生导师，从事土石坝工程研究工作。E-mail: schchi@dlut.edu.cn。

中图分类号: A
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出版历程
- 收稿日期: 2015-01-18
- 发布日期: 2015-10-19

Modeling particle breakage of rockfill materials based on single particle strength

State Key Lab of Coastal and Offshore Engineering, Dalian University of Technology, Dalian 116024, China

摘要

摘要: 颗粒破碎是影响堆石料力学性质的主要因素之一，但由于测试手段的限制，荷载作用过程中堆石的颗粒破碎难以实时度量，因而影响堆石料力学特性的深入研究。通过单粒强度试验，发现同一粒组的堆石料单粒强度较好地服从Weibull分布，而破碎后颗粒的粒径级配曲线基本服从分形分布。在此基础上，推求了堆石料三轴试验过程中级配的演化过程，给出了颗粒破碎的实时预测方法，与三轴试验结果比较，验证了本文方法的有效性。
- 堆石料 /
- Weibull分布 /
- 分形破碎 /
- 单粒强度
Abstract: The existing researches indicate that the mechanical properties of rockfill materials are significantly affected by the particle crushing. In order to reproduce the fundamental features of particle breakage, the changes of the particle size distribution (PSD) have to be described in mathematical form, i.e., to track the evolution of the PSD. This is difficult for the triaxial test processes due to the measurability limit of particle breakage. The single particle strength of the rockfill is measured and the crushing sample is sieved. The results show that the strengths of particles obey the Weibull statistics, and that the fractal distribution is found for PSD of crushed aggregates. Based on those findings, the changes of PSD can be described during the triaxial test process, the breakage of the triaxial tests is simulated, and the results reveal that the breakage process well agrees with the experimental data.
- rockfill material /
- Weibull distribution /
- fractal crushing /
- single-particle strength

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参考文献(19)

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