Shear strength characteristics of two saprolitic soils

被引：59

作者：

Gan, JKM

Fredlund, DG

机构：

[1] Department of Civil Engineering, University of Saskatchewan, Saskatoon

来源：

CANADIAN GEOTECHNICAL JOURNAL | 1996年 / 33卷 / 04期

关键词：

saprolites; shear strength; matric suction; triaxial; direct shear; coarse-grained soils;

D O I：

10.1139/t96-085-307

中图分类号：

P5 [地质学];

学科分类号：

0709 ; 081803 ;

摘要：

The saturated and unsaturated shear strength behavior of an undisturbed, completely decomposed fine ash tuff and an undisturbed, completely decomposed granite from Hong Kong were studied using direct shear and triaxial tests. The completely decomposed fine ash tuff is a fine- to medium-grained saprolite. The completely decomposed granite is a coarse-grained saprolite. Results show that matric suction increases the shear strength of both soils. The extent of the increase in the shear strength with matric suction is related to the soil-water characteristic curve for the soil and to the amount of dilation during shear. The effect of matric suction on the shear strength was more pronounced for the fine- to medium-grained completely decomposed fine ash tuff than for the coarse-grained completely decomposed granite. These studies on the saprolitic soils provide insight into the understanding of the shear strength of unsaturated, coarse-grained soils.

引用

页码：595 / 609

页数：15