Response of soil consolidation mechanical properties of Hippophae rhamnoides roots to rejuvenation of mowing
A single root ultimate tensile test and a root soil interface pull-out friction test were con-ducted using a TY-8000 tensile machine and the root system of Hippophae rhamnoides,a pioneer shrub for soil and water conservation in the arid and semi-arid areas of Inner Mongolia to investigate the effect of mowing measures on the mechanical properties of roots.The effect of mowing on the soil fixation mechani-cal properties of Hippophae rhamnoides root system was analyzed.The results showed that the ultimate an-ti-tension and resistance tensile force of a single root were positively correlated with the diameter as a pow-er function under the conditions of mowing and non-mowing when the measured root diameter was 0-5.0 mm.The ultimate tensile strength of a single root and the tensile shear strength of the root soil interface were negatively correlated with the diameter as a power function.In the representative root diameter class of Hippophae rhamnoides ranging from 0.5 to 1.5 mm,the average ultimate anti-tension of a single root in mowing was 31%higher than that in non-mowing.The average ultimate tensile strength of a single root in-creased by 37%and the average pull-out shear strength increased by 30%.It is indicated that the diameter has an impact on the strength of tensile and shear of the Hippophae rhamnoides root system,and the prop-erties of tensile and shear have been improved after the mowing treatment.
Hippophae rhamnoidesroot systemtensilefriction characteristicsshear strengthmowingwater and soil conservationbiomechanics
NETL
NSTL
万方数据
维普
