铭选大桥设计

The Design of Minxuan Bridge

铭选大桥为三跨拱桥，主孔为净跨９０ｍ的钢管砼中承式肋拱，两边跨为静跨４８ｍ钢筋砼上承式肋拱，不但造型美观，而且解决了恒载不平衡推力问题．根据地形地质条件，选用组合式桥台，钢筋砼空心板，柱基或刚性扩大基础，保证了下部结构与基础的受力和刚度要求，方便了施工。

Minxuan Bridge is a three-span arch bridge with main span(90m) of half-through concrete filled steel tubular rib arch and two side spans(48m) of reinforced concrete rib arches, not only beautiful but also a solution for the unbalance thrust of dead load. In order to meet the demands of carrying capacity and rigidity good quality and low cost, combined abutments, hollow reinforced concrete piers, pile or rigid extending footing are used according to the topology and hydrology conditions of the site.