Based On Gis Highway Along The Geological Hazard Assessment

China is one of the countries which have the most seriously geological hazards in the world.With the high speed development of our economy,the ecological environment along the highway was damaged to a different degree by the highway constructing and mine exploitation.These damages may cause or even aggravate all kinds of geological hazards.But with the frequent occurrence of the geological disasters along highway,the information and the datum about the disasters have been accumulated,whereas these datum are unable to be made use of betimes and effectively in the traditional methods. The optimum way to save,dipose and utilize the information is to establish the database system of geological hazards along highway by GIS technique.Based on the collections of relevant historical information and field investigations, and geographic and geological environment conditions along the Tongsan superhighway Shandong section,this paper conducted a survey on the types,distribution characteristics and regularities of the geological disasters.And a geological disasters database system of the highway lines was established by using the geographic information system.On this basis,and according to the features of geological disasters along highway, the basic index system for comprehensive evaluation of geological hazards along highway has been constructed,and some factors are selected to be the main influence index for the development and formation of geological hazards,such as topographic feature,geologic structure,structure of rock and soil,human engineering activity,and so on.Then the criterion of the evaluation factor and the criterion value of the corresponding factor are also given.The Analytic Hierarchy Process is used to ascertain the weight coefficient,and the method of two-level fuzzy comprehensive judgment is used to evaluate the risk of geological disasters along the highway under the extensive influence of the multi-disasters and a diagram is given to evaluate the risk of different areas along Shandong section.Furthermore,the paper also provides appropriate measures to prevent the different geological disasters along highway.