顶推施工法在波形钢腹板组合箱梁中的应用研究

发布时间：2018-02-04 02:11

本文关键词： 波形钢腹板组合箱梁顶推导梁设计施工工艺普通混凝土箱梁桥技术性能　出处：《湖南大学》2014年硕士论文　论文类型：学位论文

【摘要】：顶推施工方法在预应力混凝土桥梁以及钢箱梁的施工中已大量应用，技术也非常成熟。波形钢腹板组合箱梁作为一种新型钢混组合桥梁结构，在国内的应用也日益增多，桥型选择和施工方法也非常多，但鲜见采用顶推方法进行施工，国内的研究也相对较少。随着波形钢腹板箱梁桥的逐渐盛行，本文选择顶推施工方法在波形钢腹板组合箱梁中的应用进行研究，希望为同类桥梁的设计和施工提供参考。本文主要进行了以下几方面的工作：（1）介绍了顶推施工的发展历程、受力特点及在各种桥型上的应用情况，综述了波形钢腹板组合箱梁的特点、优势以及国内外的应用情况，并概述了波形钢腹板运用顶推法施工的优势以及特点。（2）采用经典导梁解析法分析了导梁的长度、刚度、重度对施工中主梁的受力影响，并给出了导梁与主梁在长度、刚度、重度方面的最佳比例，确定了在施工过程中的最不利荷载工况。（3）详细论述了普通混凝土箱梁桥、波形钢腹板箱梁桥采用顶推法施工的施工工艺，并对这两种桥型在顶推施工指标上进行了综合对比，凸显出了波形钢腹板箱梁桥运用顶推法施工的优势。（4）以一座中等跨径箱梁为例，采用顶推方法施工，分别按照普通混凝土箱梁桥和波形钢腹板箱梁桥进行了结构设计、配束设计、导梁设计，，并运用桥梁专业分析软件Midas，对这两种桥梁结构进行了顶推施工全过程分析和结构验算，根据计算结果，从静力性能和经济性能方面对这两种类型桥梁进行了对比。希望通过本文的研究，能丰富我国波形钢腹板组合箱梁的施工技术，并对其设计提供一定借鉴，为推动我国桥梁技术的发展提供一定的参考。
[Abstract]:The jacking construction method has been widely used in the construction of prestressed concrete bridges and steel box girders, and the technology is very mature. The corrugated steel web composite box girder is a new type of steel-concrete composite bridge structure. The application in our country is increasing day by day, the bridge type selection and construction method is also very many, but rarely uses the push-back method to carry on the construction, the domestic research is also relatively few, along with the waveform steel web box girder bridge gradually prevailing. In this paper, the application of jacking construction method in composite box girder with corrugated steel webs is studied in the hope of providing reference for the design and construction of similar bridges. The main work of this paper is as follows: This paper introduces the development course, force characteristics and application in various bridge types of jacking construction, and summarizes the characteristics, advantages and application situation of corrugated steel web composite box girder at home and abroad. The advantages and characteristics of using the pushing method in the construction of corrugated steel web are summarized. The influence of the length, stiffness and weight of the guide beam on the stress of the main beam in construction is analyzed by using the classical guide beam analytical method, and the optimum ratio of the guide beam to the main beam in length, stiffness and weight is given. The most unfavorable load condition in the construction process is determined. This paper discusses in detail the construction technology of ordinary concrete box girder bridge and corrugated steel web box girder bridge by pushing method, and makes a comprehensive comparison between these two kinds of bridge types on the index of jacking construction. It highlights the advantages of box-girder bridge with corrugated steel webs. Taking a medium span box girder as an example, the structure design, beam matching design and guide beam design are carried out according to ordinary concrete box girder bridge and corrugated steel web box girder bridge respectively. By using the bridge professional analysis software Midas, the whole process analysis and structure checking calculation of the two kinds of bridge structures are carried out, according to the calculation results. The static performance and economic performance of these two types of bridges are compared. It is hoped that the research in this paper can enrich the construction technology of the corrugated steel web composite box girder in China, and provide some reference for the design of the composite box girder, as well as for promoting the development of bridge technology in our country.
【学位授予单位】：湖南大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U445.462

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