The Regional Earthquake Destructive Assessment And The Slope Stability Research On The Five-hundred-meter Aperture Spherical Telescope Site

The Regional Earthquake Destructive Assessment and The Slope Stability is the two important engineering geological problem influencing the Five-hundred-meter Aperture Spherical Telescope site. The article is guided by the system engineering geology, and take the new Geotectonic movement, Earthquake geology, Rock mass mechanics, Slope engineering, Gray theory , Dynamics theory and digital simulation as the tool to assess the regional earthquake effect on the site and analyze the slope stability of the site. The achievements obtained is list as follow:(1) The dominance fracture zone that controls the regional stability of the site is ascertained by adopting the method of gray relevancy analysis.(2) The probability and magnitude of the regional earthquake are forecasted by analyzing the occurring mechanics of regional earthquake and its statistics.(3) Using artificial earthquake wave to confirm the time sequence of earthquake occurring and using time history analysis method of finite element to confirm the earthquake decay regulation in the site's region and the time history curve of earthquake wave's acceleration.(4) The model of deformation and failure of the slope in the site is distinguished as the slide- tensile splitting (caused by the pressure).(5) Base on the ANSYS software, using the finite element method to simulate the characters of the stress and deformation of the nature slope and the arc-excavating slope, which are caused by the gravity and earthquake force.(6) Associating the results of the finite element and the limit equilibrium method, the stability of the slope site is distinguished and the protection scheme of the slope is suggested.In this article, the author firstly introduces the theory of earthquake engineering to assess the region stability, and firstly applies the dynamics of finite element to analyze the earthquake effect, and firstly uses the dynamic finite element method to study the stability of arc bedrock slope. The originality innovation achievements not only have the theory guide meaning for the construction of the site, but have the great significance for advancing the conventional site selection theory of engineering geology and enriching the study methods of slope stability as well.