钢箱拱桥缆索吊装施工技术研究
发布时间：2019-06-26 12:55
【摘要】：伴随着我国经济突飞猛进的增长,国家对基础建设有了更多的投资,尤其对我国高速公路的建设投资达到了一个高峰期。我国是一个多山多水的国家,其中山地面积是我国国土面积的69%,处于河流和山区的桥梁,由于所在的地理位置对我们桥梁的施工带来了很多的困难,既增加了施工难度,又增加了投资成本。因此,对通航有要求或流水比较急速的河流中,我们更多的采用缆索吊装施工法来修建我们所需要的桥型。这样,在这些地区修建桥梁时,缆索吊装才能显现出它的优势,所以缆索吊装施工技术的研究对桥梁施工有着非常重要的意义和作用,以适应这一类桥梁施工发展的需求。本文简述了拱桥的国内外发展状况,拱桥传统的施工方法及拱桥缆索吊装施工法的发展现状,缆索吊装施工法发展主要从缆索吊装理论研究和实际的工程应用两个方面进行了论述。论文以罗文大桥为工程背景,并参考南宁大桥缆索吊装施工技术,初步确定了罗文大桥缆索吊装系统各索的型号。对拱桥缆索吊装施工技术的关键点和塔架分析计算方法进行了总结。缆索吊装关键技术就是要控制塔顶的位移,从而减小塔架承受的弯矩,控制塔顶的位移主要是通过控制塔顶所受的水平力。根据索型的选择,介绍了四种悬索理论,分别是悬链线、抛物线、悬索曲线及摄动法理论。同时,本文根据悬索理论,主要计算了主索承载力及安全系数计算、主索应力计算及主索安装计算;牵引索的牵引力和牵引安全系数的计算;起重索的张力、接触应力及安全系数的计算;缆风索安全系数的计算。缆索吊装系统的塔架是缆索吊装中非常重要的结构,塔架结构安全关系到整个施工过程是否顺利进行,在以前的施工过程中,由于塔架系统设计的不合理造成了很多的不必要的事故。在本文中,利用有限元软件Midas对主塔架和扣塔系统进行了完整的建模,同时用Midas对塔架系统和扣塔系统的稳定性及杆件内力进行了分析计算,通过计算分析,主塔和扣塔杆件的受力在规定的范围之内,稳定性也满足规范的要求。
[Abstract]:With the rapid economic growth of our country, the state has more investment in infrastructure construction, especially in the construction of expressway in China has reached a peak. China is a mountainous and watery country, in which the mountain area is 69% of the land area of our country, and it is located in the river and mountain bridge. because of its geographical location, it has brought a lot of difficulties to the construction of our bridge, which not only increases the difficulty of construction, but also increases the investment cost. Therefore, in rivers with navigation requirements or rapid water flow, we use cable hoisting construction method to build the bridge type we need. In this way, when the bridge is built in these areas, the cable hoisting can show its advantages, so the research of cable hoisting construction technology is of great significance and function to the bridge construction, in order to meet the needs of the development of this kind of bridge construction. This paper briefly describes the development of arch bridge at home and abroad, the traditional construction method of arch bridge and the development status of cable hoisting construction method of arch bridge. The development of cable hoisting construction method is mainly discussed from two aspects: the theoretical research and practical engineering application of cable hoisting. Taking Luowen Bridge as the engineering background and referring to the cable hoisting construction technology of Nanning Bridge, this paper preliminarily determines the types of cables in the cable hoisting system of Luowen Bridge. The key points of cable hoisting construction technology of arch bridge and the analysis and calculation method of tower are summarized. The key technology of cable hoisting is to control the displacement of the top of the tower, so as to reduce the bending moment of the tower, and the displacement of the top of the tower is controlled mainly by controlling the horizontal force on the top of the tower. According to the selection of cable type, four kinds of suspension theories are introduced, which are catenary, parabola, suspension curve and perturbation method theory. At the same time, according to the theory of suspension cable, this paper mainly calculates the bearing capacity and safety factor of main cable, the calculation of main cable stress and main cable installation, the calculation of traction force and traction safety factor of traction cable, the calculation of tension, contact stress and safety factor of lifting cable, and the calculation of safety factor of cable wind cable. The tower of the cable hoisting system is a very important structure in the cable hoisting. The safety of the tower structure is related to whether the whole construction process is going smoothly or not. In the previous construction process, due to the unreasonable design of the tower system, a lot of unnecessary accidents have been caused. In this paper, the finite element software Midas is used to model the main tower and the tower buckle system, and the stability and internal force of the tower system and the tower buckle system are analyzed and calculated by Midas. Through the calculation and analysis, the force of the main tower and the buckle tower member is within the prescribed range, and the stability also meets the requirements of the code.
【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
本文编号：2506194
[Abstract]:With the rapid economic growth of our country, the state has more investment in infrastructure construction, especially in the construction of expressway in China has reached a peak. China is a mountainous and watery country, in which the mountain area is 69% of the land area of our country, and it is located in the river and mountain bridge. because of its geographical location, it has brought a lot of difficulties to the construction of our bridge, which not only increases the difficulty of construction, but also increases the investment cost. Therefore, in rivers with navigation requirements or rapid water flow, we use cable hoisting construction method to build the bridge type we need. In this way, when the bridge is built in these areas, the cable hoisting can show its advantages, so the research of cable hoisting construction technology is of great significance and function to the bridge construction, in order to meet the needs of the development of this kind of bridge construction. This paper briefly describes the development of arch bridge at home and abroad, the traditional construction method of arch bridge and the development status of cable hoisting construction method of arch bridge. The development of cable hoisting construction method is mainly discussed from two aspects: the theoretical research and practical engineering application of cable hoisting. Taking Luowen Bridge as the engineering background and referring to the cable hoisting construction technology of Nanning Bridge, this paper preliminarily determines the types of cables in the cable hoisting system of Luowen Bridge. The key points of cable hoisting construction technology of arch bridge and the analysis and calculation method of tower are summarized. The key technology of cable hoisting is to control the displacement of the top of the tower, so as to reduce the bending moment of the tower, and the displacement of the top of the tower is controlled mainly by controlling the horizontal force on the top of the tower. According to the selection of cable type, four kinds of suspension theories are introduced, which are catenary, parabola, suspension curve and perturbation method theory. At the same time, according to the theory of suspension cable, this paper mainly calculates the bearing capacity and safety factor of main cable, the calculation of main cable stress and main cable installation, the calculation of traction force and traction safety factor of traction cable, the calculation of tension, contact stress and safety factor of lifting cable, and the calculation of safety factor of cable wind cable. The tower of the cable hoisting system is a very important structure in the cable hoisting. The safety of the tower structure is related to whether the whole construction process is going smoothly or not. In the previous construction process, due to the unreasonable design of the tower system, a lot of unnecessary accidents have been caused. In this paper, the finite element software Midas is used to model the main tower and the tower buckle system, and the stability and internal force of the tower system and the tower buckle system are analyzed and calculated by Midas. Through the calculation and analysis, the force of the main tower and the buckle tower member is within the prescribed range, and the stability also meets the requirements of the code.
【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
【参考文献】
相关期刊论文 前1条
1 陈宝春;陈康明;赵秋;;中国钢拱桥发展现状调查与分析[J];中外公路;2011年02期
，本文编号：2506194
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