缆索吊扣系统在大跨钢箱系杆拱桥施工过程中的应用研究

发布时间：2018-09-01 13:42

【摘要】：钢箱系杆拱桥在我国正处在高速腾飞的发展时期,无论是在城市桥梁还是高速公路或者高速铁路桥梁中的应用都是越来越受到设计工作者的青睐。但是,我国桥梁界对钢箱拱桥的复杂的施工技术和新颖的施工工艺研究依然较为滞后,这直接影响到了钢箱拱桥在我国更进一步的发展和应用。其中,缆索吊扣系统作为钢箱系杆拱桥的关键施工方法和工艺,对其进行应用研究尤为必要。本文根据多年来缆索吊扣系统在钢箱系杆拱桥中的应用实践,以兰州市中心滩黄河大桥为工程背景,对缆索吊扣系统在大跨钢箱系杆拱桥施工过程中的应用进行了研究。主要工作如下:(1)查阅各种相关参考文献资料,对拱桥的发展做了回顾,对钢拱桥的结构特点及主要结构形式及施工方法进行了介绍,同时介绍了工程概况、缆索吊扣体系的组成、技术性能以及参数。(2)论文根据缆索吊装—斜拉扣挂施工方法,使用有限元软件MIDAS/CIVIL对缆索吊扣系统进行分析模拟,在各种荷载工况组合下,对索力系统进行分析计算,对索鞍的各组成部分进行检算,并且分析计算缆索扣吊体系各类型杆件的轴力和应力组合,以及结构在任意荷载作用下的塔顶水平位移。通过分析计算,保证在整个吊装过程中缆索吊扣体系的安全。(3)对悬索理论以及弹性—刚性支承法进行了简介,分析中心滩黄河大桥主桥的主拱肋吊装过程,依据扣索张拉一次到位的控制思想,中心滩黄河大桥采用扣挂合一的方式施工,这样可以提高拱肋的合龙精度及对拱轴线很好的控制。
[Abstract]:Steel box tied arch bridge is in the period of rapid development in our country. The application of steel box tied arch bridge in urban bridge, highway or high-speed railway bridge is more and more favored by designers. However, the complex construction technology and novel construction technology of steel box arch bridge are still lagging behind, which directly affects the further development and application of steel box arch bridge in China. As the key construction method and technology of steel box tied arch bridge, it is necessary to study its application. Based on the application of cable hoisting system in steel box tied arch bridge for many years and taking the Huantan Yellow River Bridge in central Lanzhou City as the engineering background, this paper studies the application of cable suspension fastening system in the construction process of long span steel box tie arch bridge. The main works are as follows: (1) the development of arch bridge is reviewed, the structural characteristics, main structural forms and construction methods of steel arch bridge are introduced, and the general situation of engineering is introduced. The composition, technical performance and parameters of cable hoisting system. (2) according to the construction method of cable hoisting and cable-stayed buckling system, the finite element software MIDAS/CIVIL is used to analyze and simulate the cable hoisting system. The cable force system is analyzed and calculated, the components of cable saddle are checked and calculated, and the axial force and stress combination of various types of cable buckle and suspension system are analyzed and calculated, as well as the horizontal displacement of tower top under arbitrary load. Through analysis and calculation, the safety of cable hoisting system is guaranteed. (3) the theory of suspension and the method of elastic-rigid support are briefly introduced, and the main arch rib hoisting process of the main bridge of Huantan Yellow River Bridge is analyzed. According to the control idea of once in place of buckling cable tension, the Huantan Yellow River Bridge is constructed by the combination of buckle and hoisting, which can improve the closing precision of arch rib and control the arch axis well.
【学位授予单位】：兰州交通大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U445.4

【相似文献】