沱江大桥中跨合拢的顶推施工控制分析

The Construction Control of the Mid-span Joint of Tuojiang Bridge

连续刚构桥的合拢温度关系到成桥状态下的结构内力状态,为消除实际合拢温度与理论合拢温度的差异对结构内力的不利影响,介绍了一种合拢时采用顶推作业以消减温差效应的工程措施,分析结果表明该方法能有效降低因合拢温度差异所产生的内力效应.

The joint temperature of the continuous rigid frame bridge is important to the internal force of completed status of the bridge. In order to eliminate the bad influence of deferent temperatures between the actual joint and the theoretical joint on the internal force, a construction meansure is taken,overcoming the temperature difference effect by incremental launching construction in joint. The result indicates that the method can effectively reduce the internal force effect caused by the different joint temperatures.