Mechanical properties of steel-plastic grating and its application in fractured rock slope support project

Abstract

Anchor network support is an effective method for rocky slope support, but the defects of metal mesh in anchor network support structure to lead to the decrease of support effect and increase of support cost, which cannot be ignored. In view of the disadvantages of the metal mesh support, the steel-plastic grid is introduced into the anchor mesh support structure. In order to study the mechanical properties of steel-plastic grating and its application effect in rocky slope support, the influence mechanism of mesh size and node form on the mechanical properties of steel-plastic grating was studied by indoor experiments, and the feasibility of applying steel-plastic grating to high slope support structure was investigated by field tests. The conclusion of the study shows that the strength is maximum when the mesh size is 1:1 and the force distribution is uniform, but for the unidirectional force situation, the steel-plastic geogrid with a transverse to longitudinal ratio of 1:1.5 mesh is more economical. The influence law of nodal protrusion on the reinforcing effect of steel-plastic grating. The friction coefficient of the interface of steel-plastic grating is related to the interface of tendon and soil, and the friction coefficient of the interface is proportional to the mesh size, and the degree of influence of the nodes on the friction resistance is larger, and the larger the nodes, the better the reinforcement effect. The feasibility of steel-plastic grating applied to high slope support structure provides experience for similar construction projects.