JOURNAL OF YANGTZE RIVER SCIENTIFIC RESEARCH INSTI ›› 2018, Vol. 35 ›› Issue (6): 128-134.DOI: 10.11988/ckyyb.20161243

• INSTRUMENTATION DEVELOPMENT AND TESTING TECHNIQUES • Previous Articles     Next Articles

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 Online:2018-06-01 Published:2018-06-16

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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