Review on the Effects of Soil Moisture on Mechanical Properties of Soil Reinforcement by Plant Roots

doi:10.11924/j.issn.1000-6850.casb14120109

Abstract

Abstract: In order to analyze the mechanism of soil moisture influencing the mechanical properties of soil reinforcement by plant roots, to reveal the mechanism of soil reinforcement by plant roots and scientifically prevent soil erosion, effects of soil moisture on root distribution, root tensile strength, root-soil interaction, shear properties of root-soil composites and mechanical models of root reinforcement were analyzed. The present status and trend of mechanical properties of soil moisture on soil reinforcement by plant roots were discussed. The results indicated that root distribution was closely related to the effects of soil reinforcement by roots. However, quantitative research on relationships between soil moisture and root distribution and soil reinforcement was still insufficient. The influence of soil moisture on failure patterns of roots in shearing soils and on the mechanical effects of root reinforcement were still unclear, although it was considered in the hydraulic effects of soil reinforcement by plant roots. Besides, the existing mechanical models of root reinforcement were established without considering or sufficiently integrating with soil moisture, and the relative importance of the influencing factors were unclear. The results improved the understanding of the mechanism of rainfall on stability of slopes covered by plants, and provided theory basis for further research on interaction between soil moisture and soil reinforcement by plant roots.

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