Effects of initial density and drying-wetting cycle on soil water characteristic curve of unsaturated loess

被引：0

作者：

Liu Feng-yin ^{[1
]}

Zhang Zhao ^{[1
]}

Zhou Dong ^{[2
]}

Zhao Xu-guang ^{[3
]}

Zhu Liang ^{[1
]}

机构：

[1] Xian Univ Technol, Inst Geotech Engn, Xian 710048, Shaanxi, Peoples R China

[2] Yellow River Engn Consulting Co Ltd, Zhengzhou 450003, Henan, Peoples R China

[3] China Water Resources Pearl River Planning Survey, Guangzhou 510610, Guangdong, Peoples R China

来源：

ROCK AND SOIL MECHANICS | 2011年 / 32卷

关键词：

unsaturated soil; soil-water characteristic curve; initial density; drying-wetting cycle;

D O I：

暂无

中图分类号：

P5 [地质学];

学科分类号：

0709 ; 081803 ;

摘要：

Soil water characteristic curve (SWCC) plays a significant role in unsaturated soil mechanics. There are several factors influencing the soil water characteristic curve, such as initial density, dry-wetting cycle and stress, etc. A series of tests are carried out by means of GCTS-type SWCC device for soil water characteristic curve for remoulded unsaturated loess specimens at different bulk densities. Based on test results, after a well-adapted selection of soil water characteristic curve model, the influence of initial bulk density on unsaturated loess soil water characteristic curves are studied through analyzing the best-fitting curve parameters. The two drying-wetting cycles tests for a specimen at certain initial density are also carried out; and the corresponding hysteretic curves are obtained. By developing the concept named "degree of hysteresis" and analyzing the differences of volumetric water content in the drying-wetting cycle test, the SWCC hysteresis behaviour of unsaturated loess is preliminarily studied. The aforesaid results may play a significant role in the investigations on stress-dependent soil water characteristic curve model and the force-water coupled constitutive model.

引用

页码：132 / +

页数：6