| Steel box girder bridge is used widely because of its light weight, long span, easy totransport and construction period short etc, Based on the background of the steel boxgirder bridge A ramp construction of Xiao Xi Chong, this thesis research on the keytechniques of fabrication, installation, and joining together in the process of steel boxgirder. The main work is as follows:（1）Analysis of the main factors of the steel box girder fabrication quality, Make upscientific steel box girder of fabrication plan, including the material selection principles,quality control measures, fabrication equipment, the choice frame fabrication, weldingprocedure qualification and steel box girder assembly method，and at last, give thefabrication process and procedures. of the steel box girder.（2）According to the installation of steel box girder, Formulated a temporary supportinstallation, Gave transportation scheme and beam section joining together weldingtechnology of steel box girder segment. To ensure the safe lifting, this paper gives thehoisting installation calculation of the beam segment（3）Based on the difficulty of steel box girder bridge engineering construction quality,Analysis two aspects of the welding quality and geometric accuracy control, Gives thequality control requirements.（4）Make coating process of steel box girder, and gives the painting common problemsand remedial measures. |
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