大温差地区连续梁转体施工综合技术研究及应用

发布时间：2018-01-09 13:02

本文关键词：大温差地区连续梁转体施工综合技术研究及应用　出处：《城市建设理论研究(电子版)》2016年35期 　论文类型：期刊论文

【摘要】：随着国家高速铁路的迅猛发展,转体法施工大跨度预应力钢筋混凝土连续梁已经广泛应用于一些跨主要陆地交通道路和跨既有铁路的桥梁施工中。它可以将位于障碍上的桥梁结构置于障碍物外或近地面作业,大大减小安全风险,降低施工难度。跨乌奎高速公路转体桥连续梁工程地处新疆乌鲁木齐市,该地区夏季白天日照强烈且日照时间长,昼夜温差大,日照温差和较大的水化热会使箱梁内部产生过高的温度应力,从而影响连续箱梁的施工质量和安全使用,同时温度影响转体精度。本文对连续梁转体施工的各个过程进行数值仿真模拟,以探求各个施工阶段箱梁内应力和变形的变化规律,研究科学的施工方案,确保T型刚构转体过程安全可靠,也可为今后同类工程设计和施工提供参考。
[Abstract]:With the rapid development of national high-speed railway. The long span prestressed reinforced concrete continuous beam construction by rotary method has been widely used in the construction of some bridges that span the main land traffic roads and the existing railways. It can place the bridge structure located on the barrier outside the barrier. Or near the ground. It is located in Urumqi, Xinjiang. The summer sunshine in this area is strong, the sunshine time is long, and the temperature difference between day and night is large. The difference of sunshine temperature and the large heat of hydration will cause excessive temperature stress inside the box girder, which will affect the construction quality and safe use of continuous box girder. At the same time, temperature affects the precision of rotation. In order to explore the variation law of stress and deformation of box girder in each construction stage, this paper simulates each process of continuous beam rotation construction, and studies the scientific construction scheme. To ensure the safety and reliability of T-type rigid frame rotation process, it can also provide reference for similar engineering design and construction in the future.
【作者单位】：中铁第四勘察设计院集团有限公司;
【分类号】：U445.4
【正文快照】： 正文:1概况兰新铁路第二双线乌鲁木齐新客站至动车运用所区间跨乌奎高速公路特大桥为全线的控制性工程,桥梁在跨越乌奎高速公路处以(40+61+40)m连续梁通过。主梁在平行于高速公路两侧采用支架现浇施工,现浇完成后,32#墩逆时针转87°,33#墩逆时针转90°合拢。转体重量35000KN,

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