Equivalent Compression Curve for Clay-Sand Mixtures Using Equivalent Void-Ratio Concept

Zeng，Yiwen1; Shi，Xiusong1; Chen，Wenbo2; Feng，Weiqiang3

2023-02-01

10.1061/(ASCE)GM.1943-5622.0002643

International Journal of Geomechanics   Impact Factor & Quartile

1532-3641

1943-5622

Clay-sand mixtures are deposited worldwide, such as naturally sedimentary soils and dredged clays in human activities. These mixtures usually have a fine fraction above the transitional fine content, and the compressibility is dominated by clay matrix and affected by sand fraction. In this paper, an explicit equivalent compression curve is proposed for clay-sand mixtures. This is done by directly incorporating the equivalent void ratio into the intrinsic compression model of the clay matrix. The roles of initial and evolving soil structure developed during the compression process are described by a structural variable, which can be directly computed from the experimental data. Experimental data compiled from various literature are used for evaluating the accuracy of the suggested model. They indicate that the proposed relationship of stress versus equivalent void ratio is simple yet effective to evaluate the compressibility of clay-sand mixtures with a wide spectrum of sand fraction. The model is also practically useful for estimating the compressibility of other gap-graded soils, such as clay-gravel mixtures. The proposed stress versus equivalent void-ratio equation is an elementary function and can be readily implemented into general elastoplastic models.

Clay-sand mixtures Compressibility Equivalent compression curve Equivalent void ratio Structure variable

SCI

English

Others

National Natural Science Foundation of China["51908193","52278346","51909194"] ; Research Grants Council of Hong Kong[16201419] ; Fundamental Research Funds for the Central Universities["B200201050","522020212"]

Engineering

Engineering, Geological

WOS:000899246300004

ASCE-AMER SOC CIVIL ENGINEERS

2-s2.0-85142507337

Scopus

1.Key Lab of Ministry of Education for Geomechanics and Embankment Engineering,Hohai Univ.,Nanjing,210098,China
2.Dept. of Civil and Environmental Engineering,The Hong Kong Polytechnic Univ.,Hung Hom,Kowloon,999077,Hong Kong
3.Dept. of Ocean Sciences and Engineering,Southern Univ. of Science and Technology,Shenzhen,1088 Xueyuan Ave.,518055,China

Zeng，Yiwen,Shi，Xiusong,Chen，Wenbo,et al. Equivalent Compression Curve for Clay-Sand Mixtures Using Equivalent Void-Ratio Concept[J]. International Journal of Geomechanics,2023,23(2).

Zeng，Yiwen,Shi，Xiusong,Chen，Wenbo,&Feng，Weiqiang.(2023).Equivalent Compression Curve for Clay-Sand Mixtures Using Equivalent Void-Ratio Concept.International Journal of Geomechanics,23(2).

Zeng，Yiwen,et al."Equivalent Compression Curve for Clay-Sand Mixtures Using Equivalent Void-Ratio Concept".International Journal of Geomechanics 23.2(2023).