Advertisement

Shear Behaviors of Saturated Loess in Naturally Drained Ring-Shear Tests

  • Shun WangEmail author
  • Wei Wu
  • Wei Xiang
  • Qingbing Liu
Part of the Springer Series in Geomechanics and Geoengineering book series (SSGG)

Abstract

A series of ring-shear tests was conducted on saturated loess to investigate the effects of shear rates and normal stress levels on the shear behaviors. The test results revealed that the effect of shear rate on shear strength of loess is strongly dependent on the normal stress levels. The peak friction coefficient of the samples is positively dependent on the shear rate when relatively low normal stress was imposed, whereas shear rate do not significantly affect the peak or residual friction coefficient for samples under high normal stress levels. But on the contrary, the residual shear strength of samples with pre-exiting failure surface increase slightly with increased shear rate under high normal stress level while kept constant under low normal stress level. Excess pore pressure was estimated to have built up within the shear zone and then can lead to a reduction in the shear strength after failure occur and the degree of reduction in post-failure shear strength was evaluated by the brittleness index.

Keywords

shear behavior loess slope ring-shear test localized liquefaction 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    Yumin, W.: Loess Landslide in “West to East Gas Pipeline Project”. Oil&Gax Transporlation and Sponage 4, 8–11 (2005)Google Scholar
  2. 2.
    Dahal, R.K., et al.: Comparative analysis of contributing parameters for rainfall-triggered landslides in the Lesser Himalaya of Nepal. Environmental Geology 58, 567–586 (2008)CrossRefGoogle Scholar
  3. 3.
    Buma, J., Dehn, M.: A method for predicting the impact of climate change on slope stability. Environmental Geology 35, 190–196 (1998)CrossRefGoogle Scholar
  4. 4.
    Sassa, K., et al.: Dynamic properties of earthquake-induced large-scale rapid landslides within past landslide masses. Landslides 2, 125–134 (2005)CrossRefGoogle Scholar
  5. 5.
    Wang, G., et al.: Experimental study on the shearing behavior of saturated silty soils based on ring-shear tests. Journal of Geotechnical and Geoenvironmental Engineering 133, 319–333 (2007)CrossRefGoogle Scholar
  6. 6.
    Dai, F.-C., Wang, S.-J., Lee, C.F.: The drained residual strength of volcanics derived soil sampled on Lantau island, Hong Kong. Journal of Engineering Geology 6, 223–229 (1998)Google Scholar
  7. 7.
    Poulos, S.J.: The steady state of deformation. Journal of the Geotechnical Engineering Division 107, 553–562 (1981)Google Scholar
  8. 8.
    Wang, F., Sassa, K.: Relationship between grain crushing and excess pore pressure generation by sandy soils in ring-shear tests. Journal of Natural Disaster Science 22, 87–96 (2000)CrossRefGoogle Scholar
  9. 9.
    Stark, T.D., Choi, H., McCone, S.: Drained shear strength parameters for analysis of landslides. Journal of Geotechnical and Geoenvironmental Engineering 131, 575–588 (2005)CrossRefGoogle Scholar
  10. 10.
    Sassa, K.: Prediction of earthquake induced landslides. In: Senneset, K. (ed.) Landslides. Proceedings of the 7th International Symposium on Landslides, vol. 1, pp. 115–132. Balkema, Rotterdam (1996)Google Scholar
  11. 11.
    Kramer, S.L., Seed, H.B.: Initiation of soil liquefaction under static loading conditions. Journal of Geotechnical Engineering 114, 412–430 (1988)CrossRefGoogle Scholar
  12. 12.
    Bishop, A.W.: Progressive failure with special reference to the mechanism causing it. In: Proceedings of the Geotechnical Conference on Shear Strength Properties of Natural Soils and Rocks, vol. 2, pp. 142–150. Norwegian Geotechnical Institute, Oslo (1976)Google Scholar
  13. 13.
    Fukuoka, H., et al.: Observation of shear zone development in ring-shear apparatus with a transparent shear box. Landslides 3, 239–251 (2006)CrossRefGoogle Scholar

Copyright information

© Springer International Publishing Switzerland 2015

Authors and Affiliations

  1. 1.Institut für GeotechnikUniversität für BodenkulturViennaAustria
  2. 2.Three Gorges Research Center for Geo-hazard, Ministry of EducationChina University of GeosciencesWuhanChina

Personalised recommendations