Research Of Construction Monitoring Of Large Span Concrete-filled Steel Tubular Tied Arch Bridges

In recent years, Our country began to vigorously strengthen the construction of transport infrastructure, which span CFST arch bridge in the rapid development of China provides excellent conditions.As CFST Arch Bridge can give full play the advantages of steel pipe as the subsequent construction of stiff skeleton, Majority of Concrete Filled Steel Tubular Arch Bridge with no bracket cable-stayed buckle hanging construction method using jack tensioning buckle cable suspended fight each segment in order, until the main arch close. In this paper, Nanchong City, Xia Zhongba Jialing River Bridge, dam engineering background to study the long-span CFST Arch Bridge Construction Monitoring. The main contents are as follows:①Long Span CFST Arch Bridge construction methods, and the characteristics of each method are described and compared;②To study the non-bracket cable-stayed the buckle hanging construction features, advantages and disadvantages of the key technical issues and construction process, and some of these issues to present their views;③No bracket cable-stayed deduction linked to the construction Rib Erection cable force calculated several different ways;④Of arch bridge erection process simulation analysis using finite element software MIDAS Civil, Cable forces calculated in three different cable force calculation, compare, choose the most reasonable method as a basis for construction, other methods as proofreading;⑤Full-bridge MIDAS CIVIL simulation analysis model, to calculate the length of the boom processing, guidance Arch Bridge prefabricated, and after the close of the main arch rib section Rib stress checking;⑥Construction monitoring data with theoretical calculations of this article to compare the reliability of the finite element model and numerical method for checking this article.