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Analysis of vertical displacement characteiristics of various construction methods for light rail bridges
Pages: 69-74
Year: Issue:  3
Journal: Geotechnical Investigation & Surveying

Keyword:  light railvertical displacementbalanced cantilever construction methodbridge constructiontwist construction method;
Abstract: Due to the different construction technology and materials used,there are many differences among vertical displacements of various bridge consruction methods.Based on an elevated light rail project,main construction technology and layout of monitoring points are presented.Then monitoring data of vertical displacements on the basis of four types of bridges,including small precast box girder,continuous cast-in-site box girder,balanced cantilever construction and twist construction method,are analyzed precisely.It was concluded that vertical displacement of constructing bridges are influenced by three factors which are dead loads,concrete creep and prestressed tension.What is more,the impacts of the three factors on various bridge construction methods are discrepant largely.Besides,vertical displacement ranges of the four types of bridge construction methods are described and some advices for engineering construction are provided.
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