Journal of Jilin University(Earth Science Edition) ›› 2021, Vol. 51 ›› Issue (5): 1570-1577.doi: 10.13278/j.cnki.jjuese.20200275

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Reinforcement-Mud-Rock Bonding Test Based on FAST-1 New High Strength Anchoring Agent

Liu Quanwei1, Huang Cheng1, Liu Linsheng1, Ye Shoujie1, Zang Guoqiang2, Gao Wenlong3, Zhang Jin4   

  1. 1. Qingdao Metro Line 6 Co. Ltd., Qingdao 266100, Shandong, China;
    2. Shandong Xurui Environmental Geotechnical Engineering Investigation and Design Co. Ltd., Qingdao 266100, Shandong, China;
    3. Qingdao Branch, SGIDI Engineering Consulting(Group) Co. Ltd., Qingdao 266100, Shandong, China;
    4. School of Civil Engineering, Qingdao University of Technology, Qingdao 266033, Shandong, China
  • Received:2020-11-26 Online:2021-09-26 Published:2021-09-29
  • Supported by:
    Supported by the Youth Fund of National Natural Science Foundation of China (41702320)

Abstract: In order to study the anchoring performance and optimal anchoring length of the FAST-1 new high strength anchoring agent, the bonding performance of the reinforced slurry rock system based on the FAST-1 new high strength anchoring agent was studied from many aspects through the ultimate pull-out test under continuous load. The continuous curve model with good fitting effect was selected to calculate the relative slip, which can effectively reflect the bonding properties of different interfaces, and the effective calculation method of reinforcement slurry length was optimized. It is found that when the water material ratio is in a certain range (0.22-0.31), and it affectes the failure mode of the anchor structure in the drawing process. The smaller the water material ratio, the greater the bond strength, but the worse the fluidity; The bonding performance of the anchoring agent to the rock stratum is greater than that of the anchor cable; Increasing the contact area between the anchor cable and the slurry consolidation body can effectively improve the anchoring performance. It is concluded that the new anchoring agent has the characteristics of high early strength, and the design strength can be reached with 24 h; The anchorage length is related to the length of the anchor body. It is suggested that the anchorage length is 10.0d-15.0d(d is the diameter of the anchor cable).

Key words: anchoring agent, bonding strength, bonding displacement, anchorage length

CLC Number: 

  • U455
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