Study On The Characters Of Geological Hazards And Risk Division For New Town Planning Of Beijing Miyun

Beijing city as the capital of china,is the country’s political center,culture center,also is the world’s famous ancient capital and modern international city,Beijing is to build a world city as its goal,and constantly improve its system status and function in the world city,to enhance its international influence.In the process of city high speed process,due to Beijing area of complex topographic,geological conditions,and more serious development of geologic structure,especially with the 2008 Beijing GDP into trillion yuan internationalization big city,with more than 8%annual growth rate of rapid development situation of geological disasters and the city development,the contradiction is more acerb and outstanding,already became one of the important factors restricting Beijing sustainable development.Based on the" Beijing city master plan(2004-2020)" in" two axes,two belts,the capital of much center" structure of the eastern development belt to build capital international exchange service important foreign affairs activities of the base of the"Beijing Miyun Metro prophase planning of regional engineering geological survey" project is relied on,collected using a field survey and survey summary of geological disasters,soil properties,regional geological environment on the basis of such data,the article analyses and concludes the main types of collapse of Miyun town planning area of geological hazards:debris flow,landslide,active faults and sand liquefaction and so on,and in accordance with the geological hazards investigation and its development trend forecasting,determining the evaluation system,taking GIS system as a platform,using cluster analysis method,overlaying the evaluated factor of grid and the space,to make a classification pedigree chart and realize Metro planning of geological disaster risk zoningMiyun’s Metro geology disaster risk zoning provides the important geological basis for new town planning and design and construction of Miyun in Beijing,and also provides scientific reference for the development of Beijing City.