长江科学院院报 ›› 2017, Vol. 34 ›› Issue (7): 70-76.DOI: 10.11988/ckyyb.20160364

• 岩土工程 • 上一篇    下一篇

锚杆抗滑桩与普通抗滑桩加固黄土滑坡的对比试验研究

张 涛1,2, 门玉明3, 石胜伟1,2, 李寻昌3   

  1. 1.中国地质科学院 探矿工艺研究所,成都 611734;
    2.中国地质调查局 地质灾害防治技术中心,成都 611734;
    3.长安大学 地质工程与测绘学院,西安 710054
  • 收稿日期:2016-04-19 出版日期:2017-07-01 发布日期:2017-07-10
  • 作者简介:张 涛(1985-),男,湖南耒阳人,工程师,硕士,主要从事地质工程及地质灾害等方面的研究工作,(电话)17716156286(电子信箱)zhangtao0877@163.com。
  • 基金资助:
    中国地质调查局二级项目(DD20160278);中国地质调查局工作项目(1212011220171,1212010914021)

Comparative Model Test of Anti-slide Anchor Pile and Common Anti-slide Pile to Reinforce Loess Landslide

ZHANG Tao1,2, MEN Yu-ming3, SHI Sheng-wei1,2, LI Xun-chang3   

  1. 1.Institute of Mineral Prospecting Technology, Chinese Academy of Geological Sciences, Chengdu 611734, China;
    2.Technical Center for Geological Hazard Prevention and Control, China Geological Survey, Chengdu 611734, China;
    3.College of Geology Engineering and Geomatics,Chang’an University, Xi’an 710054, China
  • Received:2016-04-19 Online:2017-07-01 Published:2017-07-10

摘要: 通过开展3组不同桩锚结构(普通抗滑桩、锚杆抗滑桩)加固黄土滑坡的模型试验,测得不同桩锚模型的土体抗力、桩身弯矩及锚杆的应变,对不同结构形式的锚杆抗滑桩的受力形式、内力分布及破坏模式进行对比分析。结果表明:黄土滑坡防治中,锚杆抗滑桩受力结构呈“S”曲线状,桩顶位移平顺延续,土体抗力及桩身弯矩分布更均匀;增加桩顶锚杆排数,可以增大抗滑力;普通抗滑桩的破坏模式主要为塑性单铰破坏,锚杆抗滑桩主要为塑性单铰(或双铰)破坏,锚杆主要为弯剪-滑移破坏,桩周土主要为土拱塑性破坏。研究结果可为黄土滑坡防治中锚杆抗滑桩的设计理论提供技术支撑。

关键词: 锚杆抗滑桩, 普通抗滑桩, 模型对比试验, 黄土滑坡, 破坏模式

Abstract: The stress form, internal force distribution and failure mode of anti-slide anchor piles of different structures are compared and analyzed by measuring the soil resistance, bending moment of piles body and the strain of anchor in three model tests of reinforcing loess landslide by different pile-anchor structures (common anti-slide pile and anti-slide anchor pile). Results show that 1) in the prevention and control of loess landslide, the stress of anti-slide anchor pile displays an "S" shape, and the displacement of pile top is smooth and continuous, and the distributions of soil resistance and bending moment of pile body are more uniform; 2) increasing the number of anchors at the top of pile could increase the anti-slide force; 3) the failure mode of common anti-slide pile is mainly plastic single hinge damage, while that of anti-slide anchor pile is mainly single hinge (or double hinges) damage; the main failure of anchor is bending-shear slip damage, and that of the soil around pile is mainly plastic failure of soil arch. The research results provide technical support for the design theory of anti-slide anchor pile in loess landslide prevention and control.

Key words: anti-slide anchor pile, common anti-slide pile, comparative model test, loess landslide, failure mode

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