Reserch On Comprehensive Optimization In Route Scheme Of Railway In The Glacial Debris Flow Area

At present, with the rapid development of railway in our country, the construction of railway focuses gradually toward the frigid mountain area in west. However, the geological condition in this area is complex and many disasters in there. Glacier debris flow is a common geological disaster in the region, and there is no mature experience of constructing railway. Therefore, it is need to research on the route scheme of railway in glacial debris flow area urgently.Given there is few analysis of route scheme of railway in glacier debris flow area at home and abroad,and based on the analysis of glacier debris flow, the dissertation researched the strategy of route scheme in this area. Through establishing the comprehensive optimization index system of route scheme and the fuzzy evaluation model, the route scheme has been optimized. The dissertation’s main work and results are as follows:First, understanding the disaster is the precondition of railway route selection. Based on the analysis of glacial debris flow, the dissertation systematically analyzed the glacial debris flow categories, occurrence mechanism, formation conditions, features and hazards.Then, based on the cognition of glacial debris flow, the dissertation studied how to avoid or reduce the effects of disaster. According to the characteristics of constructing railway in glacial debris flow area, it put forward that the route scheme should be based on geology and risk oriented, project and economy suppled. Meanwhile, the dissertation reserched the overall route scheme selection principle of railway, the strategy in different glacial debris flow area and the strategy of bridge and tunnel selecting.Finally, given that a railway route often has several available schemes, the paper studied how to select comprehensively in numerous solutions. Based on analyzing the main factors that affect the route scheme, the dissertation built the optimization index system of railway route scheme in the glacial debris flow area.There is a total of 5 layers of indexes, including 18 detailed indicators, and they reflect the most factors that affected the railway route scheme in glacial debris flow area. Based on analytic hierarchy process and fuzzy mathematics method, the dissertation built the comprehensive optimization model of route scheme in glacial debris flow area. Used the model analyzing the engineering, the result showed that the model is useful and scientific in the evaluation of railway route scheme, and it also can offer reference for similar projects in the future.