Study Of Construction Technology Of The Superstructure Of Huangcao Wujiang River Railway Bridge

Continuous rigid frame bridge is a kind of bridge structure form that is widely used in railroad and highway in recent decades. It is welcome by the reasonable strains and stresses, the beautiful configuration, the low protecting expenses etc. With the development and progress of the design, the constructing craft and material, the long span continuous rigid frame bridge usually has been designed to the three-direction prestressed concrete box beam with changing cross section. The span has been developed up to several hundred meters now.The main method for constructing continuous rigid frame bridge is cantilevered construction method. That is cantilevered concreting method in sections or cantilevered assembling method from the top of pier.Huangcao Wujing river railway bridge is located at Huangcao country in the Wulong county of Chongqing. It crosses the river with inclination of 50° because of the limit of the geology and a varied topography. The bridge is 75 m high. Through the comprehensive comparison of the technique and the economy, the bridge span is adopted to 1 X 32 m simple bearing bridge +(96+168 +96) m prestressed concrete continuous rigid frame bridge. Until now the bridge is the longest span in the continuous rigid frame double line railway bridge in our country.The constructing technology of the superstructure is one of the key constructing technologies to Huangcao Wujiang river railway bridge. This thesis carried out the detailed treatise and study for the constructing technique of 0# section, the design and constructing technique of the light hang-basket, the constructing technique of the continuous rigid frame beam, the spot constructing technique of the section in beside span, the technique of the closure section, the constructing technique of the three- direction prestressed concrete box beam with changing cross section, the line form control technique of the long-span continuous rigid frame bridge and etc. It can be as reference to constructing of the same kind of bridges.