A refined representation method of the particle size distribution curve based on grading entropy  

作　　者：Xing Li Qun Chen Zhaozhao Liu Cheng Zhou Chen Wang Chen Chen 

机构地区：[1]State Key Laboratory of Hydraulics and Mountain River Engineering,College of Water Resource and Hydropower,Sichuan University,Chengdu,610065,China

出　　处：《Particuology》2024年第5期302-311,共10页颗粒学报（英文版）

基　　金：This research was supported by the National Natural Science Foundation of China(grant No.41977239);the Sichuan Science and Technology Program(grant No.2022YFS0539).

摘　　要：The particle size distribution(PSD)curve is an important expression of the basic properties of the soil.The characteristic parameters such as median particle size D_(50),effective particle size D_(10),and some combinations of characteristic parameters can only represent some points of the PSD curve,failing to represent all information of the PSD curve.In this paper,a fraction characteristic parameter F that could reflect the fraction size variation of the PSD curve was introduced based on grading entropy.And a new presentation method of the A-B-F three parameters was proposed for a refined representation of the PSD curve.It was found that the newly constructed model not only better represents the differences in the width of PSD curves but also has a higher sensitivity than the A-B two-parameter model proposed by Lőrincz.For PSD curves with similar distributions,the new presentation method has a higher degree of discrimination than that of the D_(50)-C_(u)-C_(c) three-parameter or the four-parameter combination G_(c) proposed by Arshad.Finally,the application of this new method in describing the spatial nonuniformity distribution of depositions and predicting the soil hydraulic conductivity was discussed.The research results can provide a reference for the refined representation of PSD curves.

关 键 词：Grading entropy Particle size distribution curve Refined representation 

分 类 号：O3[理学—力学]