Influence of load parameters during landslide slope reinforcement with soil nails based on self-drilling hollow steel bars on their bearing capacity and strength properties

Abstract

Introduction. Soil nails are widely used to reinforce landslide slopes and ground-retaining structures in many countries, including Russia. The interaction of soil nails with the soil base is of high interest to both engineers and researchers. The method of increasing the stability of landslide slopes with soil nails has proved to be versatile and cost-effective. However, the process of designing soil nails is usually carried out using empirical and semi-empirical methods that may ignore a number of important factors.Aim. To determine the most optimal angle of soil nail inclination, as well as to analyze the characteristics of soil movement of a landslide slope along a potential sliding surface and their influence on the bearing capacity of the soil nail and its strength characteristics.Materials and methods. A review of scientific publications on the influence of load parameters during landslide slope reinforcement with soil nails based on self-drilling hollow steel bar on their bearing capacity and strength properties was carried out. The review sample included 11 publications most relevant to the topic under study. Calculations were carried out using the PLAXIS 2D software environment.Results. The conducted calculations and literature review allowed the optimal angle of soil nail inclination in the slope to be established, which corresponds to a value ranging from 0° to 5° to the horizon. The study also showed that the development of shear stresses along the soil nail in time exhibits a non-uniform nature. Therefore, the assumption of a constant value of shear stresses along the entire length of the nail or anchor root can lead to an overestimation of the soil bearing capacity.Conclusions. The obtained results have confirmed the relevance of further research into the influence of load parameters during the reinforcement of landslide slopes using soil nails.