杭州塘大桥吊杆更换施工控制研究
发布时间：2018-10-11 19:11
【摘要】：近20多年来,我国建造了数量众多、形式各一的钢管混凝土拱桥,受到地形、通航条件等限制,平原地区多以中、下承式钢管混凝土系杆拱桥为主。但是由于该桥型在我国兴起的比较晚,设计时未能考虑到吊杆的更换问题,由于种种原因,对吊杆的理论认识不深入。同时,由于受工艺、设计、施工等条件的限制,一些早期的系杆拱桥存在着吊杆防腐性能差等一系列缺陷。本文以杭州塘大桥吊杆更换为背景,对系杆拱桥吊杆更换施工技术进行研究。 本文主要研究内容如下： 1)收集资料概述了系杆拱桥的发展状况、类型和特点； 2)概述了几种吊杆力的测试方法,着重介绍了振动法测试吊杆力的原理和方法及注意事项； 3)总结了吊杆更换的几种方法,并详细介绍了临时兜吊法更换吊杆的原理及方法； 4)以早期建设的系杆拱桥吊杆更换为背景,应用有限元软件建立更换吊杆分析模型,通过计算索力逼近实测索力,控制系杆位移,更换新吊杆使全桥新吊杆力接近均匀的理论索力； 5)结合工程实践,对系杆拱桥吊杆更换的前期检测、中期施工监控的全过程进行了总结和探讨,形成一套系杆拱桥吊杆更换的工艺技术。
[Abstract]:In the past 20 years, a large number of concrete filled steel tubular arch bridges have been built in China, which are limited by topography, navigation conditions and so on. However, due to the late rise of the bridge type in our country, the replacement of the suspension rod has not been taken into account in the design. For various reasons, the theoretical understanding of the suspension rod is not thorough. At the same time, because of the limitation of technology, design and construction, some early tied arch bridges have a series of defects, such as poor anticorrosion performance of suspenders. In this paper, the construction technology of suspender replacement of tied arch bridge is studied based on Hangzhou Tangtang Bridge suspender replacement. The main contents of this paper are as follows: 1) the development status, types and characteristics of tied arch bridge are summarized by collecting data, 2) several measuring methods of suspender force are summarized. This paper introduces emphatically the principle, method and matters needing attention of measuring the force of suspenders by vibration method, 3) summarizes several methods of replacement of suspenders, and introduces in detail the principle and method of replacing suspenders by temporary hoist method. 4) based on the replacement of suspenders of the early construction of tied arch bridge, the finite element software is used to establish the analytical model of replacement suspenders. The cable force is approximated to the measured cable force by calculating the cable force, and the displacement of the tie rod is controlled. The theoretical cable force of the new suspender force of the whole bridge is close to uniform by replacing the new suspension rod. 5) combined with the engineering practice, the paper summarizes and discusses the whole process of the early detection and the interim construction monitoring of the replacement of the suspenders of the tied arch bridge. Form a set of tie arch bridge suspenders replacement technology.
【学位授予单位】：重庆交通大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U445.7
本文编号：2264944
[Abstract]:In the past 20 years, a large number of concrete filled steel tubular arch bridges have been built in China, which are limited by topography, navigation conditions and so on. However, due to the late rise of the bridge type in our country, the replacement of the suspension rod has not been taken into account in the design. For various reasons, the theoretical understanding of the suspension rod is not thorough. At the same time, because of the limitation of technology, design and construction, some early tied arch bridges have a series of defects, such as poor anticorrosion performance of suspenders. In this paper, the construction technology of suspender replacement of tied arch bridge is studied based on Hangzhou Tangtang Bridge suspender replacement. The main contents of this paper are as follows: 1) the development status, types and characteristics of tied arch bridge are summarized by collecting data, 2) several measuring methods of suspender force are summarized. This paper introduces emphatically the principle, method and matters needing attention of measuring the force of suspenders by vibration method, 3) summarizes several methods of replacement of suspenders, and introduces in detail the principle and method of replacing suspenders by temporary hoist method. 4) based on the replacement of suspenders of the early construction of tied arch bridge, the finite element software is used to establish the analytical model of replacement suspenders. The cable force is approximated to the measured cable force by calculating the cable force, and the displacement of the tie rod is controlled. The theoretical cable force of the new suspender force of the whole bridge is close to uniform by replacing the new suspension rod. 5) combined with the engineering practice, the paper summarizes and discusses the whole process of the early detection and the interim construction monitoring of the replacement of the suspenders of the tied arch bridge. Form a set of tie arch bridge suspenders replacement technology.
【学位授予单位】：重庆交通大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U445.7
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