Mountainous Road Slope (Landslide) Seismic Disaster Evaluation And Countermeasure

As a sporadic natural disaster, seismic not only immediately causes huge losses about people ' s life and property but also accompanies or induce a large number of seismic geology disasters. In Chinese because of lot of mountainous and seismic,there are lots of earthquake slopes and landslides. With the implementation of large developing strategy west china,more roads will biult in mountain area and passing though strong earthquake region and rupture zone can't be avoided, this research about highway engineering slopes and landslides earthquake stability is very important.Because of the effect of earthquake on slope and landslide is a complex dynamical process,but at present, seismic designof the slope and landslide still used pseudo-static method based on limit equilibrium theory in the《Specifications of Earthquake Resistant Design for Highway Engineering》, it seriously hindered seismic disaster evaluation from quantity view. According to subject trend, the dynamic design theory based on seismic response analysis is the development direction , It was mismatched with current specification and the theory have been't used in seismic designof the slope and landslide,two kind of theory on dynamics and statics has one coordinated and transitional process in a relative long time. this paper regards Sichuan-Tibet Highway from tongmai to 105 road team and strong earthquake district of xipan highway as experiment line,by the analysis on the stability of the loose deposits and soil slope and landslide under earthquake with using of dynamic finite difference method,seismic disaster mode are proposed,seismic disaster evaluation of two kinds slope and landslide are realized. Scenario planning about aseismic measures is proposed according to seismic disaster mode. This paper puts forward conventional aseismic measures suggestion under seismic disaster mode' guidance. It provides scientific basis for engineering design in control that kind of project and has important theoretical and practical significance.Scope and production studied in the paper as follows:1. The analysis on 18 the loose deposits slope and landslide in Sichuan-Tibet Highway from tongmai to 105 road team and 7 soil slope and landslid in strong earthquake district of xipan highway seismic stability is completed by using of FLAC-3D based on elastic-plastic theory. The analysis results can make seismic stability along the two lines be mastered from entirety.2.By statistical analysis on seismic stability results,put forward loose deposits and soil slope and landslide seismic disaster mode evaluation method,seismic disaster mode are proposed and seismic disaster evaluation of two kinds slope and landslide are realized.3.According to different level raod seismic fortification goal in《Specifications of Earthquake Resistant Design for Highway Engineering》, fields seismic intensity and seismic disaster mode,puts forward conventional aseismic measures suggestion.