| The expressway Tongmai to 105 Daoban is situated in Linzhi region in Tibet.This section of the highway has the most typical geological disasters,and it is also the most dangerous segment. The road was built by soldiers in the 1950's .On the one hand the soldiers built the road;on the other hand they had to march.The road is located at the corner of Yalu Tsangpo River ,it belongs to the suture of Eurasian plate and Indian plate .Because of the considerable height difference along the Range-Gorge, the loosening and crushing mountain body,together with the strong seismic activity and powerful rainwater,there are various geological disasters along the road. Various geological disasters which has all kinds of type,high frequency and large sale of breaking out brought serious harm for the life and property of people. Therefore, for the sake of safety, effectively management and prediction the debris-flow and landslide alone the highway is really necessary. Aslo it's important to practice emergency rescue timely and effective when geological hazards occurred. Such task is one of the greatest problems of management and construction of montane expressway in the west of China, especially to the Tibet expressway.This paper employing the GIS, discuss the technological structure of management system for hazard prevention in expressway and management system for seismic information of mountain area. The system has been used on the management of Tongmai - 105Daoban expressway, providing decision - making supporting for the safe operation. And the main work is introduceted below in detail.(1) The management system for hazard prevention in expressway and seismic information of mountain area based on GIS is built. This system has three chief functions. The first is directing engineering facilities'construction and maintenance by managing and analyzing the debris flows and landslides along the freeway. The second is managing the fault infomation and seismic information. The last one is practicing emergency rescue timely and effective assistant decision-making when geological hazards occurred.(2) The overall design, including the database organizing, function, architecture and user interface design , of the hazard prevention thematic GIS are performed based on the following work: First, the field investigation of the geological disasters alone the Tongmai-105 Daoban expressway. second, collecting various kinds of relative data, such as the field records, words, pictures, videos. Third, analyzing the requirements of the thematic GIS.(3) The hazard prevention thematic GIS is developed by the ESRI ArcGIS and MS Visual Basic. This thematic GIS privedes various landslide,debris-flow,seismic information,fault infomation and emergency materials information query interface. To give a dynmatic, vusual view of the landslide, debris-flow, and entir expressway and its adjacent terrain, the function of 3D visualization models. The method for computing the stability properties of landslide and debris-flow in this system, as well as providing decision support to the emergency resue. Apart from these, the thematic mapping of the debris-flow, landslide and rainfall along the expressway can be made by this system.The major innovation of this thesis can be summarized as following two aspects:(1) In this paper, a management system for seismic information in expressway of high seismic mountain area based on GIS is built. And araising some chief functions in this system.(2) The mode of emergency resue for expressway of high intensitymountain area when geological hazards occurred is built. It is very helpfull to make decision analysis.
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