Soil-geosynthetic interface strength properties from inclined plane and direct shear tests - A comparative analysis

• Type: Article in International Conference Proceedings Book
• Date: 2016

Authors

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

Conference proceedings International

Title: GA 2016 - 6th Asian Regional Conference on Geosynthetics: Geosynthetics for Infrastructure Development, Proceedings

Pages: 925-937

6th Asian Regional Conference on Geosynthetics: Geosynthetics for Infrastructure Development, GA 2016

8 November 2016 through 11 November 2016

Indexing

Scopus - 10 Citations

Other information

Authenticus ID: P-00M-WVT

Abstract (EN): Direct shear tests are typically used to estimate soil-geosynthetic interface shear strength under relatively high normal stress values. For low values of normal stress, mechanical difficulties related to the control of normal stress may affect the accuracy of results. The inclined plane test is an alternative method to evaluate interface properties under low confining pressures. This paper establishes a comparison between the results from inclined plane and direct shear tests carried out to characterise the interfaces between two geosynthetics and a granite residual soil under dry and moist conditions. Test results show that soil-geosynthetic interface shear strength parameters estimated from direct shear tests were consistently higher than those evaluated by inclined plane tests. Despite the differences in the normal stresses and kinematics associated with the distinct methods, it was possible to describe, with reasonable accuracy, the soil-geosynthetic interface shear strength over the normal stress range of 5-150 kPa, using a Mohr-Coulomb shear strength envelope.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 13