| The main features of the SouthWest airport are: high embankment, intensive earthquake, complicated geological conditions, soft soil distribution and the short construction period. The crucial and also the chief challenge of the airport construction in this region is how to maintain the stability of the embankment.The general magnitude of earthquake in this area (Lugu Lake airport) is around magnitude 7.0. And the altitude is 3200m; the maximum height of the embankment is 50m. The thickness of the weak soil under some aera of the embankment is above 10m. However, the main factors, which induce the landslide, are: the rainfall penetration and the earthquake. It is very important to find the rule of landslide under the rainfall and earthquake. And furthermore, a quantitative analysis model for landslide precaution will be signality.The use of software Geo-Studio, create seepage finite element model, simulate high fill slope seepage under rainfall variation and the stability of slopes.Through the studying on slope stability induced by earthquakeand qualitaivly analyzing the relation between the slope stability and seismic force.Base on the New mark theory,modifying the influence mechanism of earthquake to the high embankment slope of Lugu Lake airport and the rule of the slope stability.The author built the dynamic analysis(7,8°) model of the slope to calculate and studied the stability coefficient and the timely relation chart . The works shown in this paper can provide the reference and theory support for the actual project. |
