基于渗流—应力耦合作用的边坡稳定性分析-水工结构工程专业论文.docxVIP

万方数据 万方数据 Abstract With the increase of national investment in infrastructure, large number of geotechnical problems appear. Among them, the stability problem of slope and foundation pit is particularly evident. Especially in the coastal areas, rock and soil is affected by groundwater seepage, a lot of slope instability accidents are due to the action of groundwater. There is great practical significance to research the effect of groundwater seepage on slope stability. The dissertation selects a typical profile of slope as an example and uses the software FLAC3D to model and calculate it, analyzes the condition of slope stability by the cloud of stress and displacement. By changing the underground water level, explores the mechanism of groundwater on slope by the change of slope stability circumstances. Based on the π theorem and strength reduction method, the paper calculates the safety factor of the slope under different combinations of the parameters, analyzes the influence of the strength parameters of rock and soil on the slope stability, and establishes a function of π parameters between safety factor and influencing factors. The results show that, in these rock and soil strength parameters, the influence of cohesion and friction on the safety factor is more obvious than tensile strength. The dissertation takes a foundation pit slope in Guangzhou as the research object and establishes the three-dimensional model of it, respectively calculates and analyzes the stability of the slope under three conditions of dry, seepage and stress not coupled, seepage and stress coupled; the safety factors of slope under three conditions are 1.7, 1.4 and 1.1, it illustrates that the effect of groundwater seepage coupled slope stress field on slope stability is obvious, it is very necessary to take the coupling effect of groundwater and slope into consideration when analyzing the stability of the aqueous slope; the conclusion provides a reference for slope stability