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Discussion papers | Copyright
https://doi.org/10.5194/nhess-2018-270
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

Research article 25 Sep 2018

Research article | 25 Sep 2018

Review status
This discussion paper is a preprint. It is a manuscript under review for the journal Natural Hazards and Earth System Sciences (NHESS).

Influence of shearing rate on the residual strength characteristic of three landslides soils in loess area

Baoqin Lian1,2, Jianbing  Peng1, Xingang Wang3, and Qiangbing Huang1 Baoqin Lian et al.
  • 1College of Geological Engineering and Surveying, Chang'an University, Key Laboratory of Western China Mineral Resources and Geological Engineering, Xi'an 710054, China
  • 2Department of Geology & Geophysics, Texas A&M University, College Station, TX 77843-3115, United States
  • 3State Key Laboratory of Continental Dynamics, Department of Geology, Northwest University, Xi'an 710069, China

Abstract. In order to investigate the effect of the shearing rate on the residual shear strength of slip zone soils, a series ring shear tests were carried out on slip zone soils from three landslides in loess area at the two shearing rates (0.1mm/min and 1mm/min). The slip zone soil specimens used in present study were from the northwest of China. Results indicated that the shear displacement to achieve the residual stage for specimens with higher shearing rate is greater than that of the lower rate. Relationship between the residual friction coefficients and normal stress shows that the residual friction coefficients for all specimens under the lower normal stress were greater than that under the higher normal stress at two shearing rate. Furthermore, the difference in the residual friction angle фr at the two shearing rates, фr (1)фr (0.1), under each normal stress level were either positive or negative values, with the maximum absolute value of фr (1)фr (0.1) reach up to 2.218°. However, the difference фr (1)фr (0.1) under all normal stresses was negative, which indicates that the residual shear parameters reduced with the increasing of the shearing rate in loess area.

Baoqin Lian et al.
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