梁拱组合桥梁整体顶推到位后体系转换技术研究

摘要

梁拱组合桥梁是目前城市桥梁常用的桥型之一,其钢结构部分进行整体顶推施工将是未来的一种趋势.临时构件的拆除顺序与吊杆的张拉顺序是梁拱组合桥进行整体顶推施工的关键.以3跨连续梁拱组合结构的杭州钱江八桥作为工程背景,研究梁拱组合桥梁整体顶推到位后体系转换时,临时构件的拆除顺序与吊杆的张拉顺序,并对吊杆的合理张拉力值进行分析.%Beam-arch combined bridge is one of the most common urban bridges at present, integral push construction to its steel structure part will be a trend in the future. The dismantle sequence of temporary members and tension sequence of boom is the key of integral push construction. In this paper, the 3-span continuous beam-arch combined structure Hangzhou Jianjiang No. 8 bridge is adopted as project background, this paper studied dismantle sequence of temporary members and tension sequence of boom at the time of system change technology for beam-arch combined bridge when integrally pushed to position, and give analysis to rational tensile force of the boom.