An Empirical Dilatancy Model for Coarse-Grained Soil under the Influence of Freeze-Thaw Cycles

被引：1

作者：

Ye, Yangsheng ^{[1
]}

Cai, Degou ^{[1
]}

Tian, Shuang ^{[2
,3
]}

Yan, Hongye ^{[1
]}

Ling, Xianzhang ^{[2
,3
]}

Tang, Liang ^{[2
,3
]}

Wu, Yike ^{[2
,3
]}

机构：

[1] China Acad Railway Sci Corp Ltd, Railway Engn Res Inst, Beijing 100081, Peoples R China

[2] Harbin Inst Technol, Sch Civil Engn, Harbin 150090, Peoples R China

[3] Harbin Inst Technol, Chongqing Res Inst, Chongqing 401135, Peoples R China

来源：

MATERIALS | 2022年 / 15卷 / 09期

关键词：

freeze-thaw cycles; coarse-grained soil; dilatancy; empirical equations; ELASTOPLASTIC CONSTITUTIVE MODEL; MECHANICAL-PROPERTIES; PREDICTION MODEL; STRENGTH; STRAIN;

D O I：

10.3390/ma15093167

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

In the era of high-speed trains, it is very important to ensure the safety and stability of rail tracks under adverse conditions including seasonal freezing and thawing. Freeze-thaw cycles (FTCs) affecting the engineering performance of coarse-grained soil (CGS) is one of the major reasons for track deterioration. The reported results of a number of static freeze-thaw triaxial tests on the shear behaviour of CGS are analysed herein. It was observed that confining pressure (sigma(3)) and FTCs have a significant influence on the shear behaviour of CGS. In this paper, an empirical mathematical model has been proposed to capture the dilatancy of CGS subjected to FTCs during shearing. The empirical constants a, b, and c proposed in the model are a function of sigma(3) and FTCs. The results of the model have been compared with the laboratory experiments and are found to be in good agreement.

引用

页数：10

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