南昌生米大桥拱肋三角区支架体系的设计与施工

Design and Construction of Scaffolding System Used at Triangle Zones of Arch Ribs of Shengmi Bridge in Nanchang

南昌生米大桥为钢管混凝土中承式系杆拱桥,跨径布置为(75+228+228+75)m,该桥三角区拱肋混凝土采用现浇法施工,其支架的可靠性对施工安全和质量至关重要。介绍三角区混凝土拱肋现浇法施工,支架体系的设计与施工。

The Shengmi Bridge in Nanchang is a half-through tied arch bridge of concretefilled steel tubes with span arrangement （75 ＋228＋228＋ 75） m. At the triangle zones of arch ribs of the Bridge, the concrete thereof is constructed by cast-in-place method, and the reliability of the scaffolding system used for the concrete construction is thus of vital importance to the safety and quality at construction stage. In this paper, the construction of the concrete at the zones by the cast in-place method is presented, and the design and construction of the scaffolding system are described in details as well.