新旧现浇箱梁桥拼接时机分析

Analysis on splicing opportunity of new and old cast-in-situ box girder bridge

运用梁格法对某新旧现浇箱梁拼接前后的平面变形进行了分析,通过在四种拼接时机下平面变形的对比,结合施工工期确定了最优的拼接时机,以确保拓宽后桥梁的正常运营。

Applying grillage method,this paper analyzes the horizontal deformation before and after old and new cast-in-situ box girder.Through comparing plane deformation under four kinds of splicing opportunities,combining with construction schedule,it determines optimum splicing opportunity,with a view to ensure the normal operation after the bridge widening.