Stability Analysis Of Building Foundation Considering Extreme Snow Disaster

China is one of the countries with the most serious natural disasters in the world. The disasters have many species and distribution, and the occurrence frequnency regions wide high. With the global climate change and rapid development of China's economy and society, the risk of the natural disasters becomes more serious, and the lost becomes haveier. After the southern extreme snow disaster in 2008, China pays more attention to the natural disasters.In January 2008, the snow disaster occurred in southern China. The snow disaster lasted for a long time, huge influence range, and deeply damage, all of this was historical rare. Big range, high strength snow and ice melt caused hundreds of geological disasters which caused heavy damages to railways, highways, ports, power project, mining project and hydropower project. In order to research the effect to the stability of southern building foundation caused by the extreme snow disaster, in this paper the analyses of the current specification stability analysis methods had been made, then combining with snow and ice conditions proposed building foundation destructive characteristics of the southern architectural, the affect factors to stability of building foundation in condition of extreme snow disaster had been proposed. By using the indoor experiment, finite element analysis and theoretical calculation methods, change rules of the stability of common building foundation, soil slope foundation and bedding rock slope foundation had been proffered. The main research works are as follows:â‘ The summarizes of the current specification for domestic building foundation stability analysis methods had been made, then combining with the failure characteristicses and reasons of building foundation in condition of extreme snow disaster, the affect factors to stability of building foundation in condition of extreme snow disaster had been proposed: the freeze-thaw cycle times of the foundation soil and the soil freeze-thaw depth.â‘¡With simulation of the extreme snow disaster, conventional soil mechanics parameters tests, moisture migration tests, direct shear tests, unconfined compressive strength tests and consolidation tests with typical red clay of southern China had been made, then the research to change rule of soil physical parameters on important impact factors had been made.â‘¢By using finite element analysis with FLAC3D software, combining indoor test results, the research to the stability of common building foundation and soil slope foundation had been made, then the change rule of the stability of these two kinds of foundations had been researched.â‘£Ice bulge force concept had been proposed, and then correction to expression of stability of sliding and over turning of bedding rock slope had been made. Research on sensitivity of stability in different fracture water depth, slope hight, slope angle, sliding surface angle and silding surface conditions had been made.