贝雷片钢拱架在山区河流上拆桥和建桥的应用

主要阐述了搭设一次贝雷片钢拱架,既拆除了旧桥又建了新桥。一是贝雷片钢拱架在旧桥拆除中如何拼接安装的方法。二是利用拆除旧桥的钢拱架搭设新桥5.593 m高的钢管支架。采用了在钢管支架纵向底部和顶部各设置4排圆弧钢管支撑于拱座上,使钢拱架与钢管支架组合成整体刚性拱架,两者共同受力,有效加大了拱架的应用跨径和钢管支架的高度。

Application of the Behre Piece Steel Arch Centering in Bridge Demolishing and Construction over Mountainous Rivers

One time Behre piece steel arch centering was elaborated,serving the purpose of both demolishing the old bridge and constructing a new bridge.The method of installing Behre piece steel centering splices while demolishing the old bridge was introduced.And the steel arch demolished was utilized to put up the new bridge's 5.593m high steel pipe support.4 row of circular arc steel pipe were used to support respectively in the steel pipe support longitudinal base and the crown on the skewback,causing the steel centering and the steel pipe support combines the overall rigid arch centering,both common stress,has enlarged the arch centering application span and the steel pipe support altitude effectively.