›› 2018, Vol. 39 ›› Issue (S1): 275-281.doi: 10.16285/j.rsm.2018.0490

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Study of effect of shear velocity on mechanical characteristics of bolt-grout interface

CUI Guo-jian1,2, ZHANG Chuan-qing1,2, LIU Li-peng3, ZHOU Hui1,2, CHENG Guang-tan1,2   

  1. 1. State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan, Hubei 430071, China; 2. University of Chinese Academy of Sciences, Beijing, 100049, China; 3. China Institute of Water Resources and Hydropower Research, Beijing 100048, China
  • Received:2018-04-02 Online:2018-07-20 Published:2018-09-02
  • Supported by:

    This work was supported by the National Science Foundation of China(51279201, 51609266) and the Scientific Instrument Developing Project of the Chinese Academy of Sciences(YZ201344).

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Abstract: The mechanical response of the anchorage system under intermediate strain rate conditions is the key issue in the analysis and evaluation of the safety of the support structure when subjected to earthquake, considering that the bolt-grout interface is the weakest element in the anchoring system generally; its mechanical behavior under dynamic load are extremely important. Therefore, direct shear tests of bolt-grout interface are conducted under different levels of shear rate(0.06-30mm/min). The effects of shear rate on peak shear stress, shear strength parameters and normal deformation behavior under different normal stresses are analyzed detailedly. The test results show that under intermediate strain rate conditions, with the increase of shear rate, the peak shear stress first increase rapidly then almost keep constant, whereas cohesion and normal displacement show a change trend of first increase and then decrease. The test results can provide basic data for the dynamic response analysis of the anchorage system under intermediate strain rate condition.

Key words: bolt-grout interface, shear rate, direct shear test, shear strength

CLC Number: 

  • TU 711

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