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Bulletin of Engineering Geology and the Environment

, Volume 75, Issue 4, pp 1639–1647 | Cite as

An experimental study of the mechanical characteristics of fractured loess in western China

  • Ping SunEmail author
  • Jianbing Peng
  • Liwei Chen
  • Quanzhong Lu
  • Ogbonnaya Igwe
Original Paper

Abstract

Microstructural changes in the loess deposits due to the presence of joint planes is one of the primary causes of the geohazards (ground fissures, ground subsidence, landslides, collapses, and soil and water losses) that occur in the loess regions of western China. By means of uniaxial tensile tests and triaxial shear tests conducted under different confining pressures, we tested fractured loess Q2 samples with five fracture plane inclination angles (0°, 30°, 45°, 60°, and 90°) taken from Sanyuan County, Shaanxi Province in western China, where geohazards are prevalent. Analysis of the tensile stress–strain and shear stress–strain relationships of the fractured loess specimens revealed the characteristics of the fractures that induce instability in this area. These results provide important baseline data for future research on the mechanism of geohazards in the loess regions of western China.

Keywords

Fractured loess Tensile Shear Stress–strain relationship Fracture characteristics 

Notes

Acknowledgments

This work was supported by the National Natural Science Foundation of China (NSFC, award no. 41472296) and the National Science and Technology Pillar Program during the 12th 5-year Plan Period (award no. 2012BAK10B02). The authors would like to sincerely thank the editor as well as the reviewers of this paper, who put forward useful comments that improved the manuscript substantially.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2015

Authors and Affiliations

  • Ping Sun
    • 1
    • 2
    Email author
  • Jianbing Peng
    • 3
  • Liwei Chen
    • 4
  • Quanzhong Lu
    • 3
  • Ogbonnaya Igwe
    • 5
  1. 1.Institute of GeomechanicsChinese Academy of Geological SciencesBeijingChina
  2. 2.Key Laboratory of Neotectonic Movement and GeohazardMinistry of Land and ResourcesBeijingChina
  3. 3.College of Geology Engineering and GeomaticsChang’an UniversityXi’anChina
  4. 4.China Nuclear Power Engineering Corporation, Ltd.BeijingChina
  5. 5.Department of GeologyUniversity of NigeriaNsukkaNigeria

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