The Horizontal Vibration Problems Of Railway Bridge And The Investigation & Probe In The Comprehensive Cure Of Chuhe Railway Bridge Around Nanjing For Jinhu-railway

Since the implementation of train speed-lifting program of Railway Department,both car and bridge dynamic function to the train running on the bridge has become a more important issue,in particular because of the insufficient strength and rigidity of part of bridge's horizontal structure,the horizontal vibration has topped the main obstacle to speed-lifting when rustling train passing the bridge. This thesis is based on the study and research of the horizontal vibration problem of Nanking section of Jinhu Railroad.1. After a series of comprehensive testing and structure analysis to various bridges on the Guangshe,Huning,Jinqin,Shenshan,Jingguang.ln our opinion,the key problems of the railroad bridge are as follows:(1) bridge construction is not well at the request of the railroad train speed- lift ,primarily because of low dynamic property of the horizontal frame ;(2) the bad liability of the bridges structure, concrete beam's horizontal plank coupling form; the low capacity of some of the bridges. Pinpointing the existing problems,we bring up the corresponding countermeasures.2. Based on a series of testing,examination,research and analysis conducted how to lift the speed on Nanking Section,Jinhu Road ,we explore the possibilities of solving the obstacles of Nanking segment of bridges for realizing railroad speed- lift soon due to its subframes and steel plate beams. We produced authentic and convincing data.3. After the vibration test and analysis on the Chuhe Bridge,we drafted to reinforce the bridge's double -pillar type light buttresses. We accomplished the testing buttresse reinforcement while under the premises of without railroad break-off. It outlined one of the optical methods to reinforcing the double-pillar buttresses of the whole bridge .4. Regarding the various diseases(defects) generating from the Chuhe Bridge ,We applied new technique,new materials,new procedures to ensure the structure stability and sound bridge structure appearance,for further enhancing and exploring and expanding the possibility of disease controlling technology.