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MODERN TUNNELLING TECHNOLOGY 2019, Vol. 56 Issue (5) :13-18    DOI:
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Experimental Study on Creep Characteristics of Anchored Rocks
(College of Architecture and Civil Engineering, Xi′an University of Science and Technology, Xi′an 710054)
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Abstract Support with anchor bolts is one of the main supporting methods in underground engineering. In order to understand the long-term mechanical behavior of anchored rock mass, the standard sandstone specimens were drilled along radial direction and prestress was applied, and the mechanical behavior of rock creepage before and after anchoring was studied by indoor uniaxial compression creepage test. The results show that significant improvement of mechanical behavior of the anchored rock and restrain effect of radial deformation are obtained; after rock anchoring, the average axial transient deformation and radial transient deformation and creep deformation of the rock specimen reduce by 27%, 60% and 14% respectively; in light of the deformation characteristics of the rock specimen, it is to adopt Burgers model to describe the rheological behavior of the two kinds of rock specimen and to analyze the law of parameters changes of the rheological model.
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SONG Yongjun CHE Yongxin REN Jianxi ZHANG Kun
Keywords： Rock mechanics   Anchored rock   Creep characteristic   Burgers model     
Abstract： Support with anchor bolts is one of the main supporting methods in underground engineering. In order to understand the long-term mechanical behavior of anchored rock mass, the standard sandstone specimens were drilled along radial direction and prestress was applied, and the mechanical behavior of rock creepage before and after anchoring was studied by indoor uniaxial compression creepage test. The results show that significant improvement of mechanical behavior of the anchored rock and restrain effect of radial deformation are obtained; after rock anchoring, the average axial transient deformation and radial transient deformation and creep deformation of the rock specimen reduce by 27%, 60% and 14% respectively; in light of the deformation characteristics of the rock specimen, it is to adopt Burgers model to describe the rheological behavior of the two kinds of rock specimen and to analyze the law of parameters changes of the rheological model.
Keywords： Rock mechanics,   Anchored rock,   Creep characteristic,   Burgers model     
Cite this article:   
SONG Yongjun CHE Yongxin REN Jianxi ZHANG Kun .Experimental Study on Creep Characteristics of Anchored Rocks[J]  MODERN TUNNELLING TECHNOLOGY, 2019,V56(5): 13-18
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http://www.xdsdjs.com/EN/      或     http://www.xdsdjs.com/EN/Y2019/V56/I5/13
　
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