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- Title
Influence of Gradient on Stability of Soil Slope Containing Roots.
- Authors
Haili ZHU; Yanting LI; Lu SONG
- Abstract
Abundant herbaceous and shrub roots play an important role in preventing water and soil erosion and increasing shallow slope stability. In order to make a quantitative analysis on the contribution of root system to slope stability under different slope gradient, an unconsolidated and undrained triaxia丨 compression test was conducted to measure the shear strengths of soil and root-soil composite in the two slopes in eastern Qinghai Province. In addition, under the protection of plant roots, the effect of gradient on stability of soil slope was investigated by limit equilibrium method. The results showed that the stability coefficient of soil slope planted with two kinds of brush was decreased with the increase in slope gradient, and the stability coefficient increment of soil slope containing Atriplex canescens roots was higher than that containing Caragana korshinskii roots. When the slope gradient ranged from 25°to 50°,the stability coefficient of soil slope planted with Atriplex canescens or Caragana korshinskii ranged from 0.80 to 1.38. However, when the slope gradient exceeded 55°, the increment of stability coefficient of soil slope became small.
- Subjects
SLOPE stability; PLANT roots; HERBACEOUS plants; SOIL erosion; SHEAR strength of soils
- Publication
Agricultural Science & Technology, 2015, Vol 16, Issue 10, p2350
- ISSN
1009-4229
- Publication type
Article