下承式钢箱系杆梁拱组合桥施工技术研究

发布时间：2018-01-16 07:29

本文关键词：下承式钢箱系杆梁拱组合桥施工技术研究　出处：《长安大学》2014年硕士论文　论文类型：学位论文

【摘要】：钢箱系杆拱桥具有诸多优点，，造型优雅美观、跨越能力大、承载能力高，在大跨度桥梁中占有较大优势。研究钢箱系杆拱桥的施工技术和受力性能具有重要的现实意义。本文以傅山路五跨下承式复式钢箱系杆梁拱组合桥为研究对象，主要研究内容如下：（1）总结钢箱系杆拱桥国内、外的发展、结构体系分类及结构计算方法。（2）详细介绍钢箱系杆拱桥下部结构施工工艺，包括：钻孔灌注桩、承台及墩台施工工艺。（3）对混凝土主梁现浇支架进行了详细设计与计算，支架主要构件的应力和变形均在规范容许的范围内，支架结构设计合理，满足施工要求。（4）钢箱拱加工时，需严格控制各个组成构件的加工精度，以防拼装成钢箱拱节段时，出现错位或应力集中现象。（5）钢箱拱吊装时须选择合适的设备，且节段间应设置定位块，以精确定位钢箱拱节段。（6）吊杆采用汽车吊进行安装和调整位置，并采用穿心千斤顶进行张拉，吊杆安装完成后应及时安装减震器并对其进行防护处理。（7）副拱系杆张拉工艺与主拱不同，采用悬浮张拉的特殊工艺，并对索力进行调整。
[Abstract]:The steel box tied arch bridge has many advantages, such as elegant and beautiful shape, large span capacity and high bearing capacity. It is of great practical significance to study the construction technology and mechanical performance of steel box tied arch bridge. This paper takes Fu Shan Road five-span through type composite bridge of steel box tie beam and arch as the research object. The main contents of the study are as follows: The development of steel box tied arch bridge at home and abroad, the classification of structure system and the method of structure calculation are summarized. The construction technology of steel box tied arch bridge is introduced in detail, including bored pile, pile cap and pier abutment. 3) the concrete main beam cast-in-situ support is designed and calculated in detail. The stress and deformation of the main components of the support are within the scope of the specification, and the design of the support structure is reasonable and meets the construction requirements. 4) in the process of steel box arch, the machining accuracy of each component should be strictly controlled to prevent the dislocation or stress concentration when the arch section of steel box is assembled. Steel box arch hoisting must select the appropriate equipment, and should be located between segments of the block to accurately locate the steel box arch segment. The suspension rod is installed and adjusted by car hoist, and tension is carried out by using the piercing Jack. After the installation of the boom, the shock absorber should be installed in time and treated with protection. Different from the main arch, the special technology of suspension tensioning is adopted, and the cable force is adjusted.
【学位授予单位】：长安大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U448.225;U445.4

【参考文献】