东营黄河大桥上部结构施工支架及挂篮关键技术

Key Support and Cradle Technologies in Construction of Dongying Yellow River Bridge Superstructures

东营黄河大桥主桥上部结构(116+200+220+200+116)m预应力混凝土刚构连续结合梁的箱梁采用菱形挂篮悬臂施工法。介绍了主墩和次主墩0号块施工分别选取的支架方案,以及现浇直线段的支架方案。阐述了挂篮的试压方法,并对其试压结果进行了分析。

Diamond-shaped cradle cantilever construction method is adopted for box girders of the prestressed concrete continuous rigid frame beams in the section of superstruetures （ 116 ＋ 200 ＋ 220 ＋ 200 ＋ 116）m of the main bridge of the Dongying Yellow River Bridge, The paper introduces the support schemes respectively selected for construction of blocks No. 0 of the main pier and secondary main pier and the cast- in- situ straight section. The trial loading method with cradles is explained and its trial loading results are analyzed.