The Technical Index And General Design Method Of Mountainous Expressway

Highway is a band structures, miles long and wide coverage by the surrounding natural environment and social environment impact. Highway route design which is good or bad, has a seriously influence on investment, economic and social development, environmental protection and people's lives and property. Mountain highway design is restricted by natural conditions and social factors, and much more demanding emphasis on economic, security, environmental protection, fast, comfortable, and other multi-target processing coordination, General design and technology index use of mountain highway construction is especially important. This research is an objective demand for highway construction.Based on the full investigation on China's mountain highway design concepts, procedures and methods, this dissertation had studied the main method to determine the technical standards, design flexibility and routine selection method by emphasis on ecological harmony. It put forward an overall design Philosophy for China's national conditions; put forward the procedure of flexibility in highway design; discussed the "substandard" design; established an integrated optimization model for the major technical index. Maximum length of longitudinal slope, minimum length of horizontal curve radius were also discussed in this dissertation.