Single-parameter gradation equation for coarse-grained soil and its applicability

被引：0
|
作者：
Wu Er-lu [1 ,2 ]
Zhu Jun-gao [1 ,2 ]
Wang Long [1 ,2 ]
Chen Ge [1 ,2 ]
机构：
[1] Hohai Univ, Key Lab, Minist Educ Geomech & Embankment Engn, Nanjing 210098, Jiangsu, Peoples R China
[2] Hohai Univ, Jiangsu Res Ctr Geotech Engn Technol, Nanjing 210098, Jiangsu, Peoples R China
来源：
ROCK AND SOIL MECHANICS | 2020年 / 41卷 / 03期
基金：
国家重点研发计划;
关键词：
gradation curves; gradation equation; coarse-grained soil; applicability; one parameter;
D O I：
10.16285/j.rsm.2019.0565
中图分类号：
P5 [地质学];
学科分类号：
0709 ; 081803 ;
摘要：
A gradation equation with one parameter is derived to describe continuous gradation of coarse-grained soil. The basic properties of the gradation equation are studied, and the ability of the gradation equation to reflect two typical gradation curves of continuous gradation is analyzed. The applicability of the gradation equation is verified by several gradation curves of coarse-grained soil used in earth-rock dam engineering, and the range of beta deduced for the gradation is well represented. The study shows that the gradation equation can reflect the two typical hyperbolic and sigmoidal, gradation curves. The range of gradation parameter is 0-1. the curve gradation equation expresses is hyperbolic for small value of the parameter, and is sigmoidal for large value of the parameter. The gradation equation widely applies for gradations of different coarse-grained soils used in earth-rock dam, and it is more practical than fractal gradation equation and continuous gradation equation. The equation parameter greater than 0.13 implies well representation of the gradation, which provides a basis for the gradation design of coarse-grained soil for earth-rock dam.
引用
收藏
页码：831 / 836
页数：6
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