Characterization of a soil-rough structure interface using direct shear tests with varying cyclic amplitude and loading sequences under a large cyclic testing cycle condition

2021 ◽  
Author(s):  
Peerapong Jitsangiam ◽  
Suriyavut Pra-ai ◽  
Marc Boulon ◽  
Orianne Jenck ◽  
Xiaobin Chen ◽  
...  
Keyword(s):  
Direct Shear ◽  
Cyclic Testing ◽  
Shear Tests ◽  
Direct Shear Tests ◽  
Cycle Condition

scholarly journals Sand- and Clay-Photocured-Geomembrane Interface Shear Characteristics Using Direct Shear Test

2021 ◽  
Vol 13 (15) ◽  
pp. 8201
Author(s):  
Lihua Li ◽  
Han Yan ◽  
Henglin Xiao ◽  
Wentao Li ◽  
Zhangshuai Geng
Keyword(s):  
Soil Surface ◽  
Friction Angle ◽  
Direct Shear ◽  
Tensile Crack ◽  
Shear Tests ◽  
Interface Shear ◽  
Direct Shear Tests ◽  
Carbon Black Powder ◽  
Shear Characteristics ◽  
Impermeable Layer

It is well known that geomembranes frequently and easily fail at the seams, which has been a ubiquitous problem in various applications. To avoid the failure of geomembrane at the seams, photocuring was carried out with 1~5% photoinitiator and 2% carbon black powder. This geomembrane can be sprayed and cured on the soil surface. The obtained geomembrane was then used as a barrier, separator, or reinforcement. In this study, the direct shear tests were carried out with the aim to investigate the interfacial characteristics of photocured geomembrane–clay/sand. The results show that a 2% photoinitiator has a significant effect on the impermeable layer for the photocured geomembrane–clay interface. As for the photocured geomembrane–sand interface, it is reasonable to choose a geomembrane made from a 4% photoinitiator at the boundary of the drainage layer and the impermeable layer in the landfill. In the cover system, it is reasonable to choose a 5% photoinitiator geomembrane. Moreover, as for the interface between the photocurable geomembrane and clay/sand, the friction coefficient increases initially and decreases afterward with the increase of normal stress. Furthermore, the friction angle of the interface between photocurable geomembrane and sand is larger than that of the photocurable geomembrane–clay interface. In other words, the interface between photocurable geomembrane and sand has better shear and tensile crack resistance.

scholarly journals Rapid prototyping of geosynthetic interfaces: Investigation of peak strength using direct shear tests

2017 ◽  
Vol 45 (6) ◽  
pp. 674-687 ◽  
Author(s):  
Gary John Fowmes ◽  
Neil Dixon ◽  
Liwei Fu ◽  
Catalin Alexandru Zaharescu
Keyword(s):  
Rapid Prototyping ◽  
Peak Strength ◽  
Direct Shear ◽  
Shear Tests ◽  
Direct Shear Tests
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