Russian Federation
Russian Federation
Russian Federation
Purpose: to investigate the effect of different test methods on the shear properties of geomaterials and to determine the test method that provides the most consistent shear strength results. Demonstrate the need to include shear test methods for geosynthetic materials in state standards. Determination of interaction properties of geosynthetic composite “KAPLAM” with soil. Methods: a 300×375 mm shear machine was used to perform shear tests at the soil-geomaterial interface with normal loads ranging from 100 to 500 kPa. These tests were performed according to the American standard ASTM D5321. Results: the relationships obtained from the tests allow the identification of the test methodology that produces the most significant shear strength results and an understanding of the fundamental mechanisms underlying the observed shear strength. The need for further investigation of this methodology on other geosynthetics is identified. Practical relevance: overall, these results have important implications for the design of railway embankment slopes, ISDS lining systems and shear strength testing. The tests provide better modelling of field conditions and a more accurate representation of the shear strength of composite materials.
Shear, geocomposite, coefficient of friction, tangential stress, normal stress, deformation
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3. ASTM D5321. Standard Test Method for Determining the Shear Strength of Soil-Geosynthetic and Geosynthetic-Geosynthetic Interfaces by Direct Shear.
4. ASTM D6243. Standard Test Method for Determining the Internal and Interface Shear Resistance of Geosynthetic Clay Liner by the Direct Shear Method
5. DIN EN ISO 12957-1. Geokunststoffe — Bestimmung der Reibungseigenschaften — Teil 1: Scherkastenversuch (ISO 12957-1:2005); Deutsche Fassung EN ISO 12957-1:2005.
6. DIN 60009. Geokunststoffe — Prüfung und Bestimmung des Verbundbeiwerts mit Boden im Herausziehversuch.
7. GOST 12536-2014. Grunty. Metody laboratornogo opredeleniya granulometricheskogo (zernovogo) i mikroagregatnogo sostava.
8. GOST 22733-2016. Grunty. Metod laboratornogo opredeleniya maksimal'noy plotnosti.
9. GOST 12248.1-2020. Grunty. Opredelenie harakteristik prochnosti metodom odnoploskostnogo sreza.
