大跨度预应力混凝土连续梁桥合龙施工技术研究

Research of Closure Construction Techniques for Long-Span Prestressed Concrete Continuous Girder Bridge

合龙段施工是预应力混凝土连续梁桥施工的重要环节,关系到全桥的受力和线形状况。以某黄河大桥主桥合龙段的施工为工程背景,探讨了预应力混凝土连续梁桥合龙施工的时间选择、合龙方案的选择、合龙顺序、体系转换以及施工配重等方面的内容,为类似桥梁施工提供了有价值的技术资料。

The construction of closure segment is an important step in the construction of prestressed concrete continuous girder bridge and could have direct influences on the stressing conditions and geometry of the overall bridge. With reference to the closure segment construction of the main bridge of a bridge over Huanghe River, this paper studies the selection of time and methods for closure construction, closure sequences, system transformation and construction ballasting for the prestressed concrete continuous girder bridge, and the results of studying provide valuable technical reference to the construction of the similar bridges.