基于离散元法的ATB-30沥青碎石混合料级配设计  

Gradation Design of ATB-30 Asphalt Crushed Stone Mixture Based on Discrete Element Method

作　　者：贾文斌 JIA Wen-bin(Shanxi Lujie Engineering Consulting Co.,Ltd.,Taiyuan,Shanxi 030006,China)

机构地区：[1]山西路杰工程咨询有限公司,山西太原030006

出　　处：《山西交通科技》2020年第3期47-50,共4页Shanxi Science & Technology of Transportation

摘　　要：基于离散元法进行ATB-30的级配设计,通过构建虚拟试验,以抗压强度最优为原则初步提出了粗集料级配;采用改进的k法,根据抗压强度与劈裂强度最优为原则提出了细集料级配,并通过抗压强度最优为原则逐步缩小级配范围。经室内试验验证,优选出的级配综合路用性能不低于规范中值级配,离散元法确定级配无需繁琐的试验且高效,重点在于确定合适的模型参数。The gradation design of ATB-30 was carried out based on the discrete element method.By building virtual experiments,a preliminary proposal of the coarse aggregate gradation based on the principle of optimal compressive strength was made.According to the principle of optimal compressive strength and splitting strength,the fine aggregate gradation was proposed by using the improved k method,and the gradation range was gradually reduced by the principle of optimal compressive strength.It was verified by laboratory tests that the comprehensive pavement performance of optimal gradation was not lower than the standard median gradation.Using the discrete element method to determine the gradation is efficient without tedious tests.In this research,the key point was determining the appropriate model parameters.

关 键 词：大粒径沥青混合料 级配 离散单元法 ATB-30 

分 类 号：U414.75[交通运输工程—道路与铁道工程]