Study on the Stability of the Geogrids-Reinforced Earth Slope under the Coupling Effect of Rainfall and Earthquake

Abstract

This paper focuses on understanding the dynamic response problem of flexible wrapped reinforced Earth slope under the coupling effect of earthquake and rainfall; a numerical calculation model of reinforced Earth slope considering the coupling effect of earthquake and rainfall was established. The dynamic response, pore pressure, and tensile stress distribution of the reinforcement under the rainfall before earthquake, the rainfall after the earthquake, and earthquake-rainfall are studied. The results show that the coupling effect of earthquake and rainfall is an influential factor in the dynamic analysis of reinforced Earth slopes, the analysis of which should be paid attention to and researched in the future. The combination of geogrid and soil effectively improves the deformation of the slope and the overall stability, reduces the secondary disaster of the slope, and provides a reference for the seismic construction design of the reinforced Earth slope.

Study on the Stability of Slopes Reinforced by Composite Vegetation Combined with a Geogrid under Rainfall Conditions

“…Rainfall infiltration is an important factor that induces slope instability [15,16]. Based on the theory of unsaturated seepage, Zhang et al established a hydraulic-mechanical coupling numerical calculation model for reinforced soil slopes and studied the effects of rainfall infiltration on the stress, displacement, and pore pressure of geogrid-reinforced soil slopes [17,18]. Zhang et al analyzed the seepage field distribution of root-fixed soil under rainfall conditions and found that when the root system continued to absorb water, the shear strength of unsaturated soil also increased [19,20].…”