Study On The Key Issues Of Highway Bridge Design In Mountain Area

Highway construction in the mountain areas become more and more. with the fast development of highway, and the strategy implementation of the Development of Western China. As a result of complex geological mountain topography, bridge become a important part of highay in mountain areas. Therefore, the research of the bridge design in mountain areas has has important practical significance.By conbining the experience from a number of mountain highway bridge design work in recent years, the author analysis and research on the common and difficult issues of highway bridge design in mountain areas, and put forword some empirical solutions.This paper mainly research on four parts: firstly, through comprehensive analysis the issues of prefabricated structures in programming and beam, board layout of higway bridge superstructure design in mountain areas, gives a drtailed layout method by combining the practice. Secondly, carry out reaseach on the stress analysis of prestressed concrete beams with cast-in-place process of structural, put forwords stress uniformity coefficent parameterξby combining ,which can be used to evaluate the result of structural stress analysis. Through specific examples of bridge design to prove the the effectiveness of the stress uniformity coefficent parameterξin optimizing the structure. Thirdly, research on the flexible high-pier design methods of high-pier and long-span bridge substructure in mountain areas, and gives some conclusions.Finally, analysis the foundation design under the conditions of complex engineering geological, and gives design examples by project.This paper discusses key issues of highway bridge in mountain areas as followed aspects systemically: bridge superstructure design, bridge substructure design, bridge foundation design. This will do helpful to the development of bridge design in mountain areas.