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Open AccessArticle

The Experimental Study of the Temperature Effect on the Interfacial Properties of Fully Grouted Rock Bolt

1
Department of Building Materials, School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, China
2
Key Laboratory of High-speed Railway Engineering, Ministry of Education, Southwest Jiaotong University, Chengdu 610031, China
3
Key Laboratory of Transportation Tunnel Engineering, Ministry of Education, Southwest Jiaotong University, Chengdu 610031, China
*
Author to whom correspondence should be addressed.
Appl. Sci. 2017, 7(4), 327; https://doi.org/10.3390/app7040327
Received: 9 January 2017 / Revised: 11 March 2017 / Accepted: 24 March 2017 / Published: 27 March 2017
(This article belongs to the Special Issue Structural Health Monitoring (SHM) of Civil Structures)
This study analyzes the phenomenon of performance deterioration in fully grouted rock bolts in tunnels with a dry, hot environment and high geothermal activity with a focus on temperature effects on interfacial bond performance. Three groups of fully grouted rock bolt specimens were designed based on similar mechanical principles. They were produced and maintained at 20 °C, 35 °C, and 50 °C. Through the indoor gradual loading tensile test of specimens, variations of axial force and shear stress between the rock bolt and mortar adhesive interface were obtained under different environmental temperatures. Distribution of the axial force and shear stress on the anchorage section were found under different tensile forces. Results showed that, with an increase in specimen environmental temperature, maximum shear stress of the rock bolt section became smaller, while shear stress distribution along the rock bolt segment became more uniform. In addition, the axial force value at the same position along the pull end was greater, while axial stress along the anchorage’s length decayed faster. With an increase in tensile force under different temperatures, the axial force and maximum shear stress of rock bolt specimens along the anchorage section has a corresponding increase. View Full-Text
Keywords: tunneling engineering; fully grouted rock bolt; interfacial bond strength; shear stress; axial force distribution tunneling engineering; fully grouted rock bolt; interfacial bond strength; shear stress; axial force distribution
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MDPI and ACS Style

Li, F.; Quan, X.; Jia, Y.; Wang, B.; Zhang, G.; Chen, S. The Experimental Study of the Temperature Effect on the Interfacial Properties of Fully Grouted Rock Bolt. Appl. Sci. 2017, 7, 327. https://doi.org/10.3390/app7040327

AMA Style

Li F, Quan X, Jia Y, Wang B, Zhang G, Chen S. The Experimental Study of the Temperature Effect on the Interfacial Properties of Fully Grouted Rock Bolt. Applied Sciences. 2017; 7(4):327. https://doi.org/10.3390/app7040327

Chicago/Turabian Style

Li, Fuhai; Quan, Xiaojuan; Jia, Yi; Wang, Bo; Zhang, Guibin; Chen, Siyin. 2017. "The Experimental Study of the Temperature Effect on the Interfacial Properties of Fully Grouted Rock Bolt" Appl. Sci. 7, no. 4: 327. https://doi.org/10.3390/app7040327

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