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Experimental evaluation of geosynthetics interface friction with a new procedure by using inclined plane

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Abstract

One of the important applications of geosynthetics in the slopes, such as landfills and waste disposal areas, is to use them as lining systems. To create the above conditions, most geosynthetics are placed in multilayer systems in the slopes. In these cases, the interaction between the geosynthetic–geosynthetic composite system interfaces should be controlled. To characterize the friction at the geosynthetic interface, a European Standard describes the test with an inclined plane apparatus under low stress. Many studies have shown that this procedure is not able to determine the friction for many interfaces. In 2011, the “Force Procedure” was proposed to better characterize the friction angle at the geosynthetic interface. This new procedure still requires validations to be proposed to replace the existing European standard. Two new inclined planes have been developed to compare the force procedure with the displacement procedure on many geosynthetic interfaces and to confirm the interest to revise the European Standard.

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Abbreviations

g :

Acceleration due to gravity (= 9.8 m/s2)

F(β):

Force required restraining the upper box filled with soil

Fr(β):

Resulting force to restrain the empty upper box

GMB:

Geomembrane

GTX:

Geotextile

GSY:

Geosynthetic

N GSY :

Reactive force balancing the normal component of the soil weight

N RAIL :

Reactive force balancing the normal component of the upper box weight

T GSY :

Reactive force balancing the tangential component of the soil weight

T RAIL :

Reactive force balancing the tangential component of the upper box weight

W BOX :

Upper box weight

W SOIL :

Weight of the soil in the upper box

β :

Inclined plane inclination

β lim :

Plane-inclination angle separating steps 2 and 3 in the “Force Procedure”

β rupt :

Plane-inclination angle before the sliding

β 0 :

Plane-inclination angle at the static limit of equilibrium

β 50 :

Plane-inclination angle corresponding to an upper box displacement of 50 mm

δ :

Friction angle at the GSY interface

δ stan :

Friction angle determined by the “Standard Displacement Procedure”

γ :

Constant acceleration of the upper box

λ :

Parameter representing the friction plotted along the entire friction test in the “Force Procedure”

References

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Authors and Affiliations

  1. Department of Civil Engineering, Arak Branch, Islamic Azad University, Arak, Iran

    Payman Shaykhi & Seyed Hamid Lajevardi

  2. INSA-Lyon, GEOMAS, Univ. Lyon, 69621, Lyon, France

    Laurent Briançon

Authors
  1. Payman Shaykhi
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  2. Laurent Briançon
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  3. Seyed Hamid Lajevardi
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Correspondence to Seyed Hamid Lajevardi.

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Shaykhi, P., Briançon, L. & Lajevardi, S.H. Experimental evaluation of geosynthetics interface friction with a new procedure by using inclined plane. Innov. Infrastruct. Solut. 5, 109 (2020). https://doi.org/10.1007/s41062-020-00361-4

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  • DOI: https://doi.org/10.1007/s41062-020-00361-4

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