Experimental study of grouting reinforcement influence on mechanical properties of rock fracture
LIU Quansheng1，2，3，LEI Guangfeng1，LU Chaobo4，PENG Xingxin1，ZHANG Jing1，WANG Juntao1
(1. State Key Laboratory of Geomechanics and Geotechnical Engineering，Institute of Rock and Soil Mechanics，Chinese Academy of Sciences，Wuhan，Hubei 430071，China；2. School of Civil Engineering and Architecture，Wuhan University，Wuhan，Hubei 430072，China；3. Key Laboratory of Geotechnical and Structural Safety Engineering of Hubei Province，Wuhan University，Wuhan，Hubei 430072，China；4. Guangxi Transportation Research Institute，Nanning，Guangxi 530000，China)
Abstract：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.
刘泉声1，2，3，雷广峰1，卢超波4，彭星新1，张 静1，王俊涛1. 注浆加固对岩体裂隙力学性质影响的试验研究[J]. 岩石力学与工程学报, 2017, 36(S1): 3140-3147.
LIU Quansheng1，2，3，LEI Guangfeng1，LU Chaobo4，PENG Xingxin1，ZHANG Jing1，WANG Juntao1. Experimental study of grouting reinforcement influence on mechanical properties of rock fracture. , 2017, 36(S1): 3140-3147.
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2017, Vol. 36 
