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Steel box girder mid-span continuous section ultra-long span integral lifting construction method
A super-long span integral lifting construction method for a midspan continuous section of a steel box girder comprises the construction steps that firstly, segment division design is carried out on a full-bridge steel box girder, the length of a steel box girder segment of the midspan integral lifting section is smaller than the designed span length of a midspan, and a structure that a girder body of two side spans is in a cantilever structure from the pier top to the midspan is formed; 2, through accurate simulation calculation, deformation and stress influences are eliminated; thirdly, side span temporary supports are installed, and side span beam bodies are hoisted; fourthly, a pier top cantilever section lifting device is installed; step 5, arranging a pedestal and assembling a steel box girder; sixthly, the pier top cantilever section lifting device is connected with the lifting point anchoring structure; seventhly, hoisting is conducted after a lifting system is debugged; 8, after lifting in place, closure welding construction is conducted; ninthly, the cantilever structure is dismantled; and tenthly, a bridge deck system and accessory structures are constructed. According to the method, the super-long span of the midspan continuous section of the steel box girder can be integrally and stably lifted, dislocation is not prone to occurring, and the construction efficiency is improved.
一种钢箱梁中跨连续段超长跨径整体提升施工方法，施工步骤为：步骤一：对全桥钢箱梁进行节段划分设计，其中中跨整体提升段的钢箱梁节块长度短于中跨的设计跨度长度，形成两段边跨的梁体在墩顶向中跨悬臂的结构；步骤二：通过精确模拟计算，并消除变形及应力影响；步骤三：进行边跨临时支架安装、边跨梁体吊装；步骤四：安装墩顶悬臂段提升装置；步骤五：布设台座拼装钢箱梁；步骤六：墩顶悬臂段提升装置与吊点锚固结构连接；步骤七：提升系统调试后起吊；步骤八：提升到位后进行合龙焊接施工；步骤九：进行悬臂结构拆除；步骤十：进行桥面系及附属结构施工。本方法能将钢箱梁中跨连续段超长跨径整体平稳提升，不易发生错位，提高施工效率。
Steel box girder mid-span continuous section ultra-long span integral lifting construction method
A super-long span integral lifting construction method for a midspan continuous section of a steel box girder comprises the construction steps that firstly, segment division design is carried out on a full-bridge steel box girder, the length of a steel box girder segment of the midspan integral lifting section is smaller than the designed span length of a midspan, and a structure that a girder body of two side spans is in a cantilever structure from the pier top to the midspan is formed; 2, through accurate simulation calculation, deformation and stress influences are eliminated; thirdly, side span temporary supports are installed, and side span beam bodies are hoisted; fourthly, a pier top cantilever section lifting device is installed; step 5, arranging a pedestal and assembling a steel box girder; sixthly, the pier top cantilever section lifting device is connected with the lifting point anchoring structure; seventhly, hoisting is conducted after a lifting system is debugged; 8, after lifting in place, closure welding construction is conducted; ninthly, the cantilever structure is dismantled; and tenthly, a bridge deck system and accessory structures are constructed. According to the method, the super-long span of the midspan continuous section of the steel box girder can be integrally and stably lifted, dislocation is not prone to occurring, and the construction efficiency is improved.
一种钢箱梁中跨连续段超长跨径整体提升施工方法，施工步骤为：步骤一：对全桥钢箱梁进行节段划分设计，其中中跨整体提升段的钢箱梁节块长度短于中跨的设计跨度长度，形成两段边跨的梁体在墩顶向中跨悬臂的结构；步骤二：通过精确模拟计算，并消除变形及应力影响；步骤三：进行边跨临时支架安装、边跨梁体吊装；步骤四：安装墩顶悬臂段提升装置；步骤五：布设台座拼装钢箱梁；步骤六：墩顶悬臂段提升装置与吊点锚固结构连接；步骤七：提升系统调试后起吊；步骤八：提升到位后进行合龙焊接施工；步骤九：进行悬臂结构拆除；步骤十：进行桥面系及附属结构施工。本方法能将钢箱梁中跨连续段超长跨径整体平稳提升，不易发生错位，提高施工效率。
Steel box girder mid-span continuous section ultra-long span integral lifting construction method
一种钢箱梁中跨连续段超长跨径整体提升施工方法
ZHANG KUNQIU (author) / HUANG YUN (author) / ZHANG JIANLING (author) / HU LIKAI (author) / LI GEN (author) / LIN GUOQIANG (author) / WEI WENYANG (author) / GAN DANNING (author) / HUANG HONGGANG (author) / LU ZEPING (author)
2024-06-04
Patent
Electronic Resource
Chinese
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