基于PFC^(3D)软件的砂砾石料缩尺方法对比研究  

Comparative Study on Scaling Methods of Sand and Gravel Materials Based on PFC^(3D)Software

作　　者：常玉鹏 杨凌云[1] 孟书一 刘广乾 CHANG Yu-peng;YANG Ling-yun;MENG Shu-yi;LIU Guang-qian(PowerChina Northwest Engineering Corporation Limited,Xi'an 710065,China;School of Civil Engineering and Architecture,Xi'an University of Technology,Xi'an 710048,China)

机构地区：[1]中国电建集团西北勘测设计研究院有限公司,陕西西安710065 [2]西安理工大学土木建筑工程学院,陕西西安710048

出　　处：《水电能源科学》2025年第3期89-92,共4页Water Resources and Power

摘　　要：研究砂砾石料缩尺效应对精准预测砂砾石坝的强度特性有重要意义。通过室内大型静三轴试验和基于PFC^(3D)软件的数值模拟计算,分析了原级配砂砾石料强度特征及剔除法、等量替代法、相似法、混合法4种不同缩尺方法对砂砾石料力学性质的影响。结果表明,PFC^(3D)软件具有较好的数值模拟效果。四种不同缩尺方法(σ_(1)-σ_(3))-ε_(1)特征差异性明显,原级配砂砾石料具有较高的强度和明显的塑性破坏特征。原级配砂砾石料在经过不同缩尺方法缩尺后,其粘聚力c均会被降低,而内摩擦角φ的变化则与所采用的缩尺方法有关。研究成果为进一步反推原级配砂砾石料强度参数奠定了基础。The study of the scaling effect of sand and gravel materials is of great significance for accurately predicting the strength of sand and gravel dams.Through large-scale static triaxial tests and numerical simulation calculations based on PFC^(3D)software,the strength characteristics of original grade sand and gravel materials and the effects of four different scaling methods,namely removal method,equal substitution method,similarity method,and mixing method,on the mechanical properties of sand and gravel materials were studied.The results show that PFC^(3D)software has a good numerical simulation effect.There are significant differences in(σ_(1)-σ_(3))-ε_(1)characteristics among the four different scaling methods,and the original grade sand and gravel material has high strength and obvious plastic failure characteristics.After being scaled down by different scaling methods,the cohesive force c of the original grade sand and gravel material will be reduced,and the change of friction angleφis related to the scaling method used.The research results have laid the foundation for further inferring the strength parameters of the original graded sand and gravel materials.

关 键 词：砂砾石料 缩尺效应 PFC~(3D) 三轴试验 数值模拟 原级配 

分 类 号：TV41[水利工程—水工结构工程]