基于颗粒破碎特性的堆石材料级配演化模型

赵飞翔; 迟世春; 米晓飞

doi:10.11779/CJGE201909015

基于颗粒破碎特性的堆石材料级配演化模型 English Version

赵飞翔^{1, 2},
迟世春^1,2, ,,
米晓飞^{1, 2}

1. 海岸与近海工程国家重点试验室（大连理工大学）,辽宁大连 116024;
2. 工程抗震研究所建设工程学部水利工程学院（大连理工大学）,辽宁大连 116024

基金项目: 国家重点研发计划项目（2016YFB0201001）

详细信息

作者简介:
赵飞翔(1991— ),男,博士研究生,主要从事岩石颗粒破碎特性的研究工作。E-mail: zhaofx0506@163.com。

通讯作者:
迟世春，E-mail：schchi@dlut.edu.cn

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- 文章访问数: 244
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出版历程
- 收稿日期: 2018-11-20
- 发布日期: 2019-09-24

Gradation evolution model based on particle breakage characteristics for rockfill materials

ZHAO Fei-xiang^{1, 2},
CHI Shi-chun^1,2, ,,
MI Xiao-fei^{1, 2}

1. State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian 116024, China;
2. Institute of Earthquake Engineering, Faculty of Infrastructure Engineering, Dalian University of Technology, Dalian 116024, China

摘要

摘要: 颗粒破碎会改变土体级配,进而影响其应力应变等力学行为。针对现有技术手段难以实时确定加载过程中颗粒破碎与级配变化的现状,依据天然岩石颗粒的破碎特性,建立了一个基于颗粒强度的级配演化模型。模型中应力参数采用增量加载法,可预测加载过程中的级配演化。由单粒强度试验确定颗粒破碎特性和模型参数,试验结果表明颗粒强度服从Weibull分布。筛分颗粒破碎后的碎片发现,粒径累计分布可用正态曲线拟合,且不同粒组的粒径累计分布相似。最后,模型计算结果与三轴试验数据的对比分析表明,模型可以较好地预测试样在加载过程中的级配变化。
- 颗粒破碎特性 /
- 堆石料 /
- 粒径分布 /
- 级配演化 /
- 三轴试验
Abstract: Particle crushing will change the density and gradation curves of geotechnical materials, and then influence their stress-strain behavior. The proposed gradation evolution model, based on the particle breakage characteristics of natural rocks, is to obtain the information of particle breakage and gradation which is difficult to be dealt with by normal technical means during loading process. The stress parameter of the model adopts the incremental loading method, so the model can predict the evolution of gradation during experimental process. The particle breakage characteristics and model parameters are determined through the crushing tests on a single particle. The experimental data obtained from the tests show that the particle strength obeys the Weibull distribution. In addition, the grain-size distributions after crushing tests are normally distributed, and the distributions of different groups are similar. Finally, the proposed model is proved to be able to predict the gradation variation of rockfill materials correctly through comparative analysis of the calculated results and triaxial test data.
- particle breakage characteristic /
- rockfill material /
- grain-size distribution /
- gradation evolution /
- triaxial test

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参考文献(22)

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