Evaluation of interfacial properties between rock mass and shotcrete

Bae, Gyu-Jin; Chang, Soo-Ho; Lee, Seok-Won; Park, Hae-Geun

doi:10.1016/j.ijrmms.2003.12.093

Cited by 5 publications

(1 citation statement)

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“…e rock is an artificial siltstone called John Stone, and the contact surface consists of a series of regular triangular shapes and irregular shapes based on analytical geometry theory. Bae et al [8] obtained the tensile strength, cohesion, friction angle, shear stiffness, and normal stiffness of the joints of shotcrete-surrounded rock at different ages through the indoor direct shear test. Yilmaz [9] introduced a test method for testing the shear strength of thin-layer shotcrete and rock contact surfaces invented by the Rock Mechanics Laboratory of Kingsoft University in South Africa.…”

Section: Introductionmentioning

confidence: 99%

Influence of Ground Temperature on Shotcrete-to-Rock Adhesion in Tunnels

Duan

Zhang

Lai

2019

Advances in Materials Science and Engineering

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Long and deep tunnels are increasingly designed and built worldwide, often in severe geothermal environments characterized by high temperature in the rocks. is issue cannot be ignored because high temperature definitely affects the strength of the adhesion between the concrete and the surrounding rocks, whatever the lining cast in place, segmental or sprayed using shotcrete. e causes of geothermal heat and the effect of the temperature on tunnel linings during and after their construction are recalled and discussed in this paper. Both temperature and humidity are shown to be the most relevant factors affecting adhesion strength, whose loss is related to the microdamage in the shotcrete layers closest to the rock. Possible ways to improve adhesion strength and to minimize the high-temperature detrimental effect are also presented and discussed.

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Section: Introductionmentioning

confidence: 99%

Influence of Ground Temperature on Shotcrete-to-Rock Adhesion in Tunnels

Duan

Zhang

Lai

2019

Advances in Materials Science and Engineering

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Shear strength characteristics of shotcrete–rock interface for a tunnel driven in high rock temperature environment

Tong

Karakus

Wang

et al. 2016

Geomech. Geophys. Geo-energ. Geo-resour.

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The shear behavior of shotcrete-rock interface same as the bond behavior plays a significant role on shotcrete behaviour in a tunnel. The shear strength of shotcrete-rock interface is noticeably affected by high temperature in high rock temperature tunnels. However, there are limited number of studies dedicated to investigate behaviour of shotcrete-rock interface in high temperatures. Therefore, a series of direct shear tests was performed, under the normal stress of 0.5, 1.0 or 1.5 MPa, to investigate the influence of high rock temperature on the shear characteristics of shotcrete-rock interface. Shotcrete-rock samples were cured under the temperature range of 20 to 100°C and the relative humidity of 55 or 95 % before shear tests. The results show that curing temperature, relative humidity and normal stress have significant impacts on the peak shear strength, however, only the normal stress has the same impact on the residual shear strength. The peak shear strength as well as peak cohesion reaches its maximum value at 60°C curing temperature with 55 % relative humidity level, and at 80°C curing temperature when the relative humidity is 95 %. The shear stressdisplacement curve presents various shapes in the section of post-shear due to the influence of high temperature and relative humidity.

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The shear behaviors of concrete-gypsum specimens containing double edge cracks under four-point loading conditions

Haeri

Sarfarazi

et al. 2022

Theoretical and Applied Fracture Mechanics

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Evaluation of interfacial properties between rock mass and shotcrete

Cited by 5 publications

References 0 publications

Influence of Ground Temperature on Shotcrete-to-Rock Adhesion in Tunnels

Influence of Ground Temperature on Shotcrete-to-Rock Adhesion in Tunnels

Shear strength characteristics of shotcrete–rock interface for a tunnel driven in high rock temperature environment

The shear behaviors of concrete-gypsum specimens containing double edge cracks under four-point loading conditions

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