Analysis of Soil-Geosynthetic Interfaces Shear Strength Through Direct Shear Tests

• Type: Article in International Conference Proceedings Book
• Date: 2013

Authors

Fernanda Ferreira (Author) FEUP; Castorina Silva Vieira (Author) FEUP; Maria de Lurdes Lopes (Author) FEUP

Conference proceedings International

Title: DESIGN AND PRACTICE OF GEOSYNTHETIC-REINFORCED SOIL STRUCTURES

Pages: 44-53

International Symposium on Design and Practice of Geosynthetic-Reinforced Soil Structures / 26th Italian National Conference on Geosynthetics

Bologna, ITALY, OCT 14-16, 2013

Indexing

ISI Proceedings

ISI Web of Knowledge - 7 Citations

Scopus - 11 Citations

Scientific classification

FOS: Engineering and technology > Civil engineering

CORDIS: Technological sciences > Engineering > Civil engineering

Other information

Authenticus ID: P-008-WGA

Abstract (EN): This paper describes an experimental study carried out in a large scale direct shear apparatus to evaluate the behaviour of several soil-geosynthetic interfaces. To assess the influence of soil type on soil-geosynthetic interfaces shear strength, two soils with different characteristics were employed: a clean poorly graded sand and a well graded residual soil from granite, typical of northern Portugal. In addition to soil type, other parameters with influence on the interfaces shear strength were analysed, namely, the soil relative density and the geosynthetic type. Therefore, direct shear tests were performed for different values of soil relative density, using two distinct geosynthetics with the same nominal tensile strength: a biaxial woven geogrid and a uniaxial geocomposite reinforcement. For the different interfaces and test conditions, the curves shear stress versus shear displacement are presented and discussed, taking into account the peak and large displacement shear strength of the interfaces. The shear strength envelopes are analysed regarding the interface friction angle and the apparent cohesion. The interface shear strength coefficients are obtained and compared for the different experimental conditions.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 10