Stability Analysis of Slopes on Both Sides of Highway in Geotechnical Area under Rainfall Conditions

Abstract

The objective of this study is to correctly analyze the slope stability, strengthen the guidance of engineering construction, and ensure the safety of people’s lives and property. In this study, the numerical simulation software Geo-Studio is used to simulate the stability variation rules of the slope on both sides of the highway in the rocky region when the angles of the upper and lower slope of the platform width are changed under the action of light rain for a long time respectively, and the corresponding comparison analysis is made with the corresponding natural working condition. The results show that the infiltration of rainwater has a great influence on the slope on both sides of the highway in the geotechnical area, which is mainly reflected in the decrease of the stability of the multi-level slope, the significant change of the sliding surface (including the location, size, shape, etc. of the sliding surface), the potential instability form of the slope (overall stability and local stability), and the slow but continuous change of the pore water pressure in the soil. Through the rainfall test on the highway slope, it is found that the instability mechanism of the slopes on both sides of the highway in the geotechnical area is affected by the conditions of rainfall intensity, rainfall duration, cumulative rainfall capacity, and rainfall patterns. In addition, the changes of rainfall infiltration rate in the side slope of highway in rock and soil area and the migration rules of water field in side slope are also obtained. The findings of this study can be used as a reference and basis for engineering design and construction. Moreover, the safety coefficient of the slope after renovation meets the stability requirement. Therefore, the slope engineering treatment measures on both sides of the highway can effectively deal with the hidden disaster brought by landslide deformation or instability.