Abstract
Taking the high and steep slope of a ski resort as the background, in order to ensure the structural safety of the slope in the subsequent complex rainfall environment, the calculation principle of unsaturated soil slope stability is summarized, and the parameter interaction analysis is proposed. The numerical simulation method is used to study the influence of various rainfall types on slope stability; combined with a multiparameter combination, the slope stability is analyzed. The results show that different types of rainfall have a significant impact on the safety factor of the slope, the safety factor of the slope under the front rainfall type is the smallest, the minimum value is 1.38, and the front rainfall mostly occurs in the late summer, so it is necessary to avoid construction in the late summer or do a good job of safety monitoring in the late summer. Through setting monitoring points, it is found that the pore water pressure of the three positions from small to large is in the order of slope toe<slope middle<slope top, and the pore water pressure at the slope toe is basically 0 kPa. At this time, the matric suction at the slope toe is the minimum, so the protection should be strengthened. In the combination analysis of the four parameters, the direct effect and coupling effect of C15 are at a small level, which indicates that when the four parameters fluctuate together, the mutual coupling is not the effect of a single parameter, which provides a theoretical reference for the follow-up related research.
Highlights
With the development of the national economy, a large number of railways, highways, water conservancies, mines, towns, and other facilities are built, especially in the construction of hills and mountainous areas
Lin et al [10] obtained the conclusion that the low rainfall intensity and long duration rainfall will increase the pore water pressure of deep soil, resulting in sliding failure and large-scale landslide
In view of the stability of high and steep slopes under complex conditions, this paper analyzes the stability of slopes in a ski resort under four different rainfall conditions by using GeoStudio finite element analysis software
Summary
With the development of the national economy, a large number of railways, highways, water conservancies, mines, towns, and other facilities are built, especially in the construction of hills and mountainous areas. Ping et al [17] took a natural loess slope in Jingyang as the research object, carried out artificially simulated rainfall experiments of the large loess slope under different rainfall intensities, and summarized the water infiltration law and deformation failure mode of the loess slope. Cai et al [23], based on the principle of saturatedunsaturated seepage, taking the low highway slope in Yunnan Province as the research object, calculated and analyzed the slope stability and reliability under different rainfall intensities by using GeoStudio finite element software. The best coupling combination is proposed by using the method of parameter combination analysis, and the internal mechanism of the influence of rainfall infiltration on slope stability is analyzed, providing guidance and guarantee for subsequent construction and operation
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