Analyzing the deformation and failure of geosynthetic-encased granular soil in the triaxial stress condition. Issue 6 (December 2020)

• Record Type: Journal Article
• Authors: Song, Fei; Jin, Yangtao; Liu, Huabei; Liu, Jie
• Is Part Of: Geotextiles and geomembranes. Volume 48:Issue 6(2020:Dec.)
• Page Start: 886
• Page End: 896
• Publication Date: 2020-12
• Subjects: Geosynthetics -- Geosynthetic-encased granular soil -- Equivalent stiffness -- Apparent cohesion -- Analytical method -- Triaxial stress condition; Membranes (Technology) -- Periodicals; Membranes (Technology); Periodicals; Electronic journals; 624.189
• DOI: 10.1016/j.geotexmem.2020.06.007
• Languages: English
• ISSNs: 0266-1144

Abstract

Abstract: The equivalent strength and stiffness of geosynthetic-encased soil are two important parameters for analysis of cellular geosynthetic-reinforced foundations and earth structures. However, limited analytical approaches exist for the estimation of these parameters, and this limitation hinders their applications in geotechnical engineering practice. In this study, an analytical method is proposed for the prediction of the stress-strain response of geosynthetic-encased soil by employing the soil response in the triaxial stress condition and the theory of thin cylinders. This method has the advantages of theoretical rigorousness and convenience for use and can consider soil nonlinearity, soil dilatancy, soil plasticity and soil-geosynthetic interaction. Different types of yield criteria for soils can be readily incorporated into the proposed method. The proposed method is validated against the results of triaxial compression tests on geosynthetic-encapsulated sand. The good agreement between the predicted stress-strain curves and the measured curves demonstrates the effectiveness of the method. In addition, design tables and parametric studies are provided by employing the formulated analytical method for application purposes. Highlights: In this study, an analytical incremental method was proposed for the prediction of the stress-strain response of geosynthetic-encased soil. It has the advantage of theoretical rigorousness and convenience for use and can consider soil dilatancy, and soil-geosynthetic interaction. The proposed method was validated against the results of triaxial compression tests on geosynthetic-encapsulated sand.