关键词: 贝雷桁架, 支架施工, 稳定性, 混凝土箱梁

Abstract: Taking the southern approach bridge of Yudong Yangtze River Bridge as the research object, which applies the cast-in-place construction technology to continuous box girder on Bailey beams stent, the stent-reaction forces under different conditions of cast-in-place box girder are obtained through Dr 3.0 bridge finite element analysis software. Then Bailey truss structure model established by ANSYS 9.0 finite element analysis software is applied to check the spatial stability in the construction of Bailey truss structure. The relevant stability coefficients and the corresponding instability modes are obtained. Eventually, relevant recommendations to prevent such instability of Bailey stent are given.

Key words: Bailey truss structure , stent construction , stability , concrete box girder ;