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Studies on Geotextile/ Soil Interface Shear Behavior Ali A. Mahmood Civil Engineer, P.O.Box 473, Cote St. Luc, Montreal, H4V 2Z1, Quebec, Canada NorAzazi Zakaria Lecturer, School of Civil Engineering, Universiti Sains Malaysia, Perak Branch Campus, Seri Iskandar, 31750 Tronoh, Perak, Malaysia Fauziah Ahmad Deputy Dean, School of Civil Engineering, Universiti Sains Malaysia, Perak Branch Campus, Seri Iskandar, 31750 Tronoh, Perak, Malaysia |
ABSTRACT
Shear frictional behavior of soil/geosynthetic interfaces plays a pivotal role in the overall performance of geotextile-reinforced roads. Since a substantial proportion of the total land area in many Southeast Asian countries is composed of organic soils, it was seen of particular importance to investigate the shear frictional behavior of such soils when subjected to loading with geotextiles used as reinforcement.
Two types of soils were used; organic silty clay and a fill material, which is a sandy type of soil.
Shear box tests were performed to determine the shear strength parameters of the soils and to investigate the shear frictional behavior of the soil/geotextile interfaces.
It appears from the results of the shear box tests performed that there exists a relationship between the tensile strength of the geotextile used and the shear strength of its interface with the organic clay, with the shear strength of the interface increasing with the increasing tensile strength of the geotextile.
The shear strength of geotextile/fill interfaces did not show a consistent relationship with the geotextile tensile strength.
