混和梁斜拉桥中跨加载合龙施工技术

摘要

主跨926 m的鄂东长江公路大桥是一座边跨为混凝土梁，中跨为钢箱梁的混合主梁斜拉桥。根据该桥的结构特点，分析合龙条件、不同合龙方案对成桥线形和应力的影响，最终确定采取加载合龙的施工技术。文中介绍了加载合龙的具体流程、关键技术及实施效果，为同类型桥梁提供参考。%The Edong Highway Bridge over the Changjiang River with a 926 m main span is a hybrid girder cable-stayed bridge with its side span being a concrete beam and mid-span being a steel box girder. According to the structural characteris-tics of the bridge, the effect on the bridge geometry and stress by closure conditions and different closure schemes is analyzed, and the construction scheme of loading closure is finally decided. This paper introduces the specific process, key technology and implementation effect of the closure process, providing references for same types of bridges.