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Volume 36 Issue zk2
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LIN Hang, ZHONG Wen-wen, XIONG Wei, TANG Wen-yu, CAO Ping. Effect of bolt length and slope rate on optimum anchorage angle[J]. Chinese Journal of Geotechnical Engineering, 2014, 36(zk2): 7-11. DOI: 10.11779/CJGE2014S2002
Citation: LIN Hang, ZHONG Wen-wen, XIONG Wei, TANG Wen-yu, CAO Ping. Effect of bolt length and slope rate on optimum anchorage angle[J]. Chinese Journal of Geotechnical Engineering, 2014, 36(zk2): 7-11. DOI: 10.11779/CJGE2014S2002
shu

Effect of bolt length and slope rate on optimum anchorage angle

  • 1. School of Resources &
    Safety Engineering, Central South University, Changsha, 410083, China;
    2. Key Laboratory of Highway Construction &
    Maintenance Technology in Loess Region, Shanxi Transportation Research Institute, Taiyuan 030006, China;
    3. Key Laboratory of Mechanics on Disaster and Environment in Western China (Lanzhou University), Ministry of Education, Lanzhou 730000, China

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  • Received Date: July 27, 2014
  • Published Date: July 27, 2014
    Graphical Abstract
    • Abstract
  • The optimum anchorage angle is the important parameter in the design of anchoring engineering. In order to study the effect of bolt length and slope rate on the optimum anchorage angle, a numerical model for slopes is established using FLAC3D. It is found that the anchor length and the slope rate have great influence on the optimum anchorage angle. The results show that: (1) With the increase of anchor length, the factor of safety decreases at first and then remains stable, so there exists an effective length. The effective length decreases with the increase of anchorage angle. (2) The increase of anchorage angle will lead to the safety factor first to increase and then decrease, so there exists an optimum anchorage angle. The optimum anchorage angle will decrease linearly with the increase of bolt length. (3) When the anchorage angle is less than the optimum anchorage angle, the slope rate only has small impact on the safety factor. When the anchorage angle is the same as the optimum anchorage angle or larger than the optimum anchorage angle, the impact of the slope rate on the slope stability becomes more obviously, and the larger slope rate leads to the larger optimum anchorage angle.
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    • References (14)
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