Dwarf Pylon Cable-stayed Consolidation Method On The Application Research Of Beam Type Bridge

With the rapid development of our country's economic construction and then brought more and more traffic flow. The old bridges appear many defects and diseases, especially the problem of excessive midspan cross deflects, this cannot meet the current rapid development of traffic flow. Therefore the application of bridge reinforcement technology is very important.This paper firstly introduces several common reinforcement methods about the upper structure of continuous girder bridge:increasing beam section reinforcement method, pasting steel reinforcement method, pasting CFRP reinforced method, externally prestressing reinforcement method, changing structure system consolidation method, etc.; Meanwhile, this paper expounds the characteristics of various reinforcement methods, various suitable scopes. First the dwarf pylon cable-stayed consolidation method in changing structure system consolidation method was proposed, and the implementation scheme and advantages of the dwarf pylon cable-stayed consolidation method are stated.Secondly, the reinforcement basic principle and structure of dwarf pylon cable-stayed structure consolidation method are discussed in detail. So that dwarf pylon cable-stayed consolidation method of study takes an important role in guide.Finally, the three different spans continuous girder bridges reinforcement method are used the dwarf pylon cable-stayed reinforcement structure, and respectively affecting the parameters of the dwarf pylon cable-stayed structure consolidation method (reinforcement effects of stay-cable spacing, stay-cable numbers, bridge pylon height and initial tension) are optimized. These three different spans in using dwarf pylon cable-stayed structure consolidation method have various optimal parameters.