长江科学院院报 ›› 2018, Vol. 35 ›› Issue (6): 128-134.DOI: 10.11988/ckyyb.20161243

• 仪器设备与测试技术 • 上一篇    下一篇

高恒阻滑坡监测锚索静力拉伸特性试验及应用

陶志刚1a,1b,2,杨伟1a,1b,刘卫欣3,蒋超超1a,1b,陈伊凡1a,1b   

  1. 1.中国矿业大学北京 a.深部岩土力学与地下工程国家重点实验室; b.力学与建筑工程学院, 北京 100083;
    2.绍兴文理学院 岩石力学与地质灾害实验中心, 绍兴 312009;
    3.河北工程大学 科学技术研究院,河北 邯郸 056038
  • 收稿日期:2016-11-26 修回日期:2017-01-19 出版日期:2018-06-01 发布日期:2018-06-16
  • 作者简介:陶志刚(1981-),男,河北邯郸人,讲师,博士,硕士生导师,主要从事岩体力学与工程灾害控制理论的教学工作。E-mail:taozhigang@263.net
  • 基金资助:
    国家自然科学基金项目(41502323,41602308); 浙江省山体地质灾害防治协同创新中心开放基金(PCMGH-2016-Z-02)

Anchor Cable of High Constant Resistance for Landslide Monitoring: Static Tensile Test and Engineering Application

TAO Zhi-gang1,2,3, YANG Wei1,2, LIU Wei-xin4, JIANG Chao-chao1,2, CHEN Yi-fan1,2   

  1. 1.State Key Laboratory for Geomechanics and Deep Underground Engineering, China University of Mining and Technology,Beijing 100083, China;
    2.School of Mechanics and Civil Engineering, China University of Mining and Technology, Beijing 100083, China;
    3.Center of Rock Mechanics and Geoharzards, Shaoxing University, Shaoxing 312009, China; 4.Research Institute of Science and Technology, Hebei University of Engineering, Handan 056038, China
  • Received:2016-11-26 Revised:2017-01-19 Published:2018-06-01 Online:2018-06-16

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摘要： 实践证明利用传统预应力锚索进行露天矿山滑坡灾害监测预警,当滑动力超过预应力锚索材料破断力时会发生锚索被拉断破坏的现象,从而导致整个监测系统失效。针对上述情况,一种具有负泊松比特性的高恒阻大变形滑坡监测锚索被研发出来,且广泛应用于露天矿山滑坡监测领域。首先描述了高恒阻滑坡监测锚索的结构组成;然后,建立了高恒阻力学模型,揭示了其大变形的工作机理;接着,通过一系列静力拉伸条件下力学特性室内试验,试验结果证明,高恒阻锚索拉伸时,可保持500 kN的恒阻力,最大延伸量可达850 mm,揭示高恒阻滑坡监测锚索在几何尺度与应变尺度上的负泊松比效应;最后,将该锚索应用于南芬露天铁矿边坡安全监测现场,成功对“2010-0731滑坡”全过程进行了监测预警,为其在类似工程中的应用提供了理论和实践依据。

关键词: 滑坡监测, 高恒阻滑坡监测锚索, 静力拉伸试验, 负泊松比, 力学模型, 监测预警

Abstract: Practice has proved that in using traditional pre-stressed cable for the monitoring and early warning of open-pit mine landslide, cables would fracture and result in failure of the whole monitoring system when sliding force is higher than the material strength of pre-stressed cables. In view of this, Prof. Manchao He developed a system of anchor cables with high constant resistance for monitoring large deformation. The system has been used in open-pit mine for landslide monitoring. In this paper, the effect of negative Poisson’s ratio of the cables is revealed in geometric and strain dimensions through indoor static tensile tests. The structure of the high constant-resistance cable is described, and the working mechanism of monitoring large deformation is analyzed by establishing a mechanics model of high constant resistance. Results manifest that the cable of high constant-resistance can be stretched to a maximum of 850 mm with a constant resistance of 500 kN. The cable has been applied to the safety monitoring of slope at Nanfen open-pit iron mine, and provided monitoring and early-warning for the landslide on 31st July, 2010.

Key words: landslide monitoring, cables of high constant-resistance for landslide monitoring, static tensile test, negative Poisson’s ratio, mechanical model, monitoring and early-warning

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