Special construction method for dragging main beam of extra-large bridge

• Main Authors: XU SHAOPING, GUO WANHUI, MENG FANWEI, LIANG PENGGANG, CHANG YANHUA, JIANG XINHE, SUN BAIFENG, GUO JIANQIANG, JIANG BO, TANG ZHENYA, MA TIANCHANG, SU CHUNSHENG, HAO YUFENG
• Format: Patent
• Language: Chinese; English
• Published: 16.06.2020
• Subjects: ASSEMBLY OF BRIDGES; CONSTRUCTION OF BRIDGES; CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES; FIXED CONSTRUCTIONS; OR VIADUCTS

The invention discloses a special construction method for a main beam of a lower dragging extra-large bridge, which comprises the following steps of: S02: 0 # section construction: pouring twice, andforming a support by once pouring; s03, hanging basket construction is conducted, specifically, a hanging basket is moved forwards to the front end of the zero beam section, and the formwork erectingelevation is determined; and erecting a formwork to bind the No.1 beam section steel bars and finish the arrangement of the prestressed pipeline. Aiming at the conditions that the span of a main beamis 200 m, the length of double cantilevers is large, the width-to-span ratio of a box girder is small, and the construction technical difficulty is large when the construction period goes through strong wind seasons and winter, smooth construction is guaranteed, and good practicability is achieved. 本发明公开了一种下拖特大桥主梁专项施工工法，包括步骤S02：0#段施工：分两次浇筑，托架按一次浇筑成型；步骤S03：挂篮施工：将挂篮前移至0号梁段前端，确定立模标高；立模绑扎1号梁段钢筋及完成预应力管道布置。针对主梁跨度200m，双悬臂长度长、箱梁宽跨比