Effect of Thermal Treatment on the Basic Friction Angle of Rock Joint

There is a lack of information about the temperature-dependent nature of the rock surface, which is one of the essential parameters to predict the surface friction. In the present study, we experimentally study the effect of temperature on the basic friction angle of the marble surface through the direct shear test under the low normal loading condition and tilting test (Stimpson/disk tilt test). The basic friction angle gradually decreases with the increase in temperature from 20°C to 600°C for the two kinds of the tilting test. The results indicate that the Stimpson test on samples with the length-to-diameter ratio of 2 can be more reliable to estimate the basic friction angle of the rock surface after exposure to high temperatures. The results illustrate that the sliding angle depends on the surface condition. With the increase in the repetitive measurements, the sliding angle decreases as the marble surface is cleaned, and the parameter increases as the marble surface is not cleaned.

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Measurement of the basic friction angle of planar rock discontinuities with three rock cores

Bulletin of Engineering Geology and the Environment ◽

10.1007/s10064-017-1045-0 ◽

2017 ◽

Vol 78 (2) ◽

pp. 847-856 ◽

Cited By ~ 7

Author(s):

C. C. Li ◽

N. Zhang ◽

J. Ruiz

Keyword(s):

Friction Angle ◽

Rock Discontinuities ◽

Basic Friction Angle ◽

Rock Cores

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The role of tilting rate and wear of surfaces on basic friction angle testing

Rock Mechanics and Rock Engineering: From the Past to the Future ◽

10.1201/9781315388502-39 ◽

2016 ◽

Cited By ~ 5

Author(s):

I Pérez-Rey ◽

L Alejano ◽

J Arzúa ◽

J Muralha

Keyword(s):

Friction Angle ◽

Basic Friction Angle

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Use of a tilting table to determine the basic friction angle of hard rock samples. Note

International Journal of Rock Mechanics and Mining Sciences & Geomechanics Abstracts ◽

10.1016/0148-9062(90)94960-2 ◽

1990 ◽

Vol 27 (2) ◽

pp. A76-A77

Keyword(s):

Hard Rock ◽

Friction Angle ◽

Rock Samples ◽

Basic Friction Angle ◽

Tilting Table

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Effect of Joint Characteristics and Geometries on Tunnel-Type Anchorage for Suspension Bridge

Applied Sciences ◽

10.3390/app112411688 ◽

2021 ◽

Vol 11 (24) ◽

pp. 11688

Author(s):

Hyunsung Lim ◽

Seunghwan Seo ◽

Junyoung Ko ◽

Moonkyung Chung

Keyword(s):

Rock Joint ◽

Three Dimensional ◽

Suspension Bridge ◽

Friction Angle ◽

Rock Joints ◽

Joint Orientation ◽

Pull Out ◽

Joint Characteristics ◽

Dimensional Finite Element ◽

Three Dimensional Finite Element

In this study, the pull-out behavior of a tunnel-type anchorage was examined by considering both geometric and rock joint characteristics. Three-dimensional finite element analyses were performed with reference to the tunnel-type anchorage cases designed and constructed in Korea. The factors influencing the anchorage response were analyzed: the enlarged part, anchorage spacing, joint orientation, spacing, and the shear strength of the rock joints. According to the numerical studies, the size of the enlarged part influenced the failure shape of the tunnel-type anchorage. It was found that the anchorage spacing, the relationship between the tunnel-type anchorage, and the joint orientation and spacing greatly influenced the pull-out behavior of the anchorage. Additionally, the friction angle had a larger impact on the anchorage’s pull-out resistance than the cohesion between the rock joints.

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