Study on the Influence of Typical Plant Roots on the Stability of Slope in the Hilly Areas of the Lower Yangtze River

Abstract

Plant roots have a positive effect on shallow landslides on slopes. In order to study the influence of typical vegetation on the slope stability in the hilly area of the lower reaches of the Yangtze River, the triaxial test was used to obtain the shear strength parameters of the root-soil complex of typical vegetation of Salix babylonica and Pterocarya stenoptera in the hilly areas of the lower Yangtze River. On this basis, the slope stability calculation model based on the limit element theory is established. The safety factor of the reinforced slope was calculated under three kinds of slope conditions (30°, 39°, 45°), and the influence of root type, position and depth on the slope stability was analyzed. Studies have shown that different types of plant roots mainly affect the stability of slope by enhancing the cohesion of soil. The improvement of slope stability by root system is related to the reinforcement position of root system. The effect of vegetation root on the reinforcement effect of slope The range is roughly in the vicinity of the sliding surface of the slope, and the closer to the sliding surface, the better. Plant roots have a peak effect on the slope at a certain depth, not as deep as possible. This paper provides a reference for studying the influence of vegetation on slope stability, and provides a reference for guiding the slope greening in the hilly areas of the lower Yangtze River.