Experimental study of grouting reinforcement influence on mechanical properties of rock fracture

被引：0
|
作者：
Liu Q. [1 ,2 ,3 ]
Lei G. [1 ]
Lu C. [4 ]
Peng X. [1 ]
Zhang J. [1 ]
Wang J. [1 ]
机构：
[1] State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan, 430071, Hubei
[2] School of Civil Engineering and Architecture, Wuhan University, Wuhan, 430072, Hubei
[3] Key Laboratory of Geotechnical and Structural Safety Engineering of Hubei Province, Wuhan University, Wuhan, 430072, Hubei
[4] Guangxi Transportation Research Institute, Nanning, 530000, Guangxi
来源：
Yanshilixue Yu Gongcheng Xuebao/Chinese Journal of Rock Mechanics and Engineering | 2017年 / 36卷
基金：
中国国家自然科学基金;
关键词：
Grouting reinforcement; Mechanical properties; Rock fracture; Rock mechanics;
D O I：
10.13722/j.cnki.jrme.2016.0459
中图分类号：
学科分类号：
摘要：
Grouting technique reinforced the fractured rock mass significantly, and it has a great effect on the mechanical properties of rock fracture surface. A fractured rock specimen production method was presented to study the influence of grouting on mechanical properties of fractured rock mass, overcoming the difficult problems of the original rock fissure sampling. The grouting reinforcement test was carried out with the self-developed fractured rock mass grouting platform, in which the fractured specimens produced with the proposed method The normal-shear loading tests were carried out. It is indicated that artificial fractured specimens and original rock fissures are of good geometric similarity, satisfying indoor physical test requirements. The normal and tangential mechanical properties are changed significantly by grouting reinforcement. After grouting, the peak shear strength and residual strength of rock fractures and the resistance to deformation of fracture surface increase greatly. The normal load will affect tangential behavior of fissure, tangential strength increases with the normal loading. The overall strength and stability of the rock mass increase by the grouting with the enhancement of mechanical properties of rock fractures. © 2017, Science Press. All right reserved.
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页码：3140 / 3147
页数：7
相关论文
共 16 条
  • [1] Tremblay D., Simon R., Aubertin M., A constitutive model to predict the hydro-mechanical behavior of rock joints, Proceedings of Ottawa Geo, pp. 2011-2018, (2007)
  • [2] Kulhaway F.H., Stress deformation properties of rock and rock discontinuities, Engineering Geology, 9, 4, pp. 327-350, (1975)
  • [3] Wong Robina H.C., Lin P., Tang C., Et al., Mechanisms of crack coalescence of pre-existing flaws under biaxial compression, Chinese Journal of Rock Mechanics and Engineering, 21, 6, pp. 808-816, (2002)
  • [4] He M., Xue T., Peng Y., A new way of determining mechanical parameters of engineering rock masses, Chinese Journal of Rock Mechanics and Engineering, 20, 2, pp. 225-229, (2001)
  • [5] Bai S., Ren W., Feng D., Et al., Research on the strength behavior of rock containing coplanar close intermittent joints by direct shear test, Rock and Soil Mechanics, 20, 2, pp. 10-16, (1999)
  • [6] Barton N., Choubey V., The shear strength of rock joints in theory and practice, Rock Mechanics and Rock Engineering, 10, 1-2, pp. 1-54, (1977)
  • [7] Bandis S., Lumsden A.C., Barton N., Experimental studies of scale effects on the shear behavior of rock joints, International Journal of Rock Mechanics and Mining Sciences and Geomechanics Abstracts, 18, 1, pp. 1-21, (1981)
  • [8] Ge X., Mechanical behaviors and analog analytical method of joint and weak intercalation in rock mass, Rock and Soil Mechanics, 1, 1, pp. 54-75, (1979)
  • [9] Ge X., Mechanical behaviors and analog analytical method of joint and weak intercalation in rock mass, Rock and Soil Mechanics, 1, 2, pp. 57-72, (1979)
  • [10] Chen W., Yang J., Zou X., Et al., Research on macro mechanical parameters of fractured rock mass, Chinese Journal of Rock Mechanics and Engineering, 27, 8, pp. 1569-1575, (2008)
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