The Effect of Hydraulic Hysteresis on the Shear Strength of Clayey Soils under Partially Saturated States
- DOI
- 10.2991/isaeece-17.2017.29How to use a DOI?
- Keywords
- Unsaturated soil; soil-water retention; hydraulic hysteresis; clayey soil; shear strength
- Abstract
Hydraulic hysteresis is a common phenomenon in unsaturated soils. The soil-water retention curve from the drying process is different from the one from the wetting process due to the effect of hydraulic hysteresis. The soil strength is strongly affected by the soil-water characteristics. Hence, hydraulic hysteresis can have an important effect on the shear strength of a soil. The direct shear tests under the drying and wetting conditions were done to explore the effect mechanism of the hydraulic paths on the shear strength of clayey soils. The results show that shear strengths of the clayey soils have the obviously peak values at low water contents for the drying paths. And the strain softening characteristics of the clayey soils are exhibited. However, the strain hardening is exhibited under high water content conditions for the drying paths. The strain hardening is always occurred for the wetting paths. The shear strengths of the clayey soils are obviously different from the wetting and drying paths although the water content of the samples and loaded normal stress are the same. The shear strength loss ratio, is introduced to quantify the difference of shear strength of clayey soils under different hydraulic paths. The shear strength loss ratio is between 8% and 18%, which shows that hydraulic hysteresis has an important influence on the shear strength of clayey soils.
- Copyright
- © 2017, the Authors. Published by Atlantis Press.
- Open Access
- This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).
Cite this article
TY - CONF AU - Haifeng Lu AU - Pan Chen PY - 2017/03 DA - 2017/03 TI - The Effect of Hydraulic Hysteresis on the Shear Strength of Clayey Soils under Partially Saturated States BT - Proceedings of the 2017 2nd International Symposium on Advances in Electrical, Electronics and Computer Engineering (ISAEECE 2017) PB - Atlantis Press SP - 154 EP - 161 SN - 2352-5401 UR - https://doi.org/10.2991/isaeece-17.2017.29 DO - 10.2991/isaeece-17.2017.29 ID - Lu2017/03 ER -