Stability of Geogrid-Reinforced High-Fill Slopes: A Review of Experimental and Numerical Advances

Geogrid Reinforcement Technology is one of the most widely used slope stabilization techniques in modern geotechnical engineering. In the following paper, the recent research achievements and development trends of geogrid reinforcement technology will be systematically introduced from the perspective of four aspects: interface interaction characteristics, strength properties of the reinforcement, numerical simulation and analysis, and long-term service performance. Based on the existing 40 core publications in the related field, the following conclusions can be drawn: Firstly, the study of interface characteristics has evolved from the analysis of the macro level to the exploration of anisotropy characteristics, cyclic responses, and environmental degradation effects; however, there is still a big gap between the micro-mechanisms and the macro-analysis; Secondly, the results of the triaxial test show that the main function of the geogrid is to improve the cohesion of the soil; Thirdly, the problem of particle fragmentation in special soils, such as calcareous sand and coral sand, has become a key point in the current study. (3) Numerical simulation methods have developed from traditional macroscopic finite element analysis to FEM-DEM coupled multi-scale methods. The application of green reinforcement materials and new structures has expanded the engineering application range of numerical simulations; (4) the study of long-term performance has changed from empirical judgment to full-scale monitoring and data assimilation, while long-term prediction models under coupled conditions of multiple fields still need improvement. This paper aims to identify the gaps of current research and forecast the direction of future study based on a review of the current status of related research, which can serve as a comprehensive reference for related studies.