Abstract：Research purposes: Aiming at the features of the long construction period and bearing heavy load of the main tower of the large － span bridge，the research is done on the construction technology of the steel － concrete coincided tower of the middle － tower structure of the 2 × 1 080 m three － tower and two － span suspension bridge of Maanshan Changjiang River bridge．
Research conclusions: Through optimizing the matching ratio of concrete and studying the engineering testing，the structural style of the concrete column was adopted． In this way，the position between the bottom segment of the steel tower and the concrete surface could be well adjusted and the rather big space could be provided for tamping the concrete． Also the grouting was conducted to the top part for ensuring the flatness and compactness of the mass steel －concrete coincided section． By optimizing and selecting the reasonable hoisting process，the precise positioning between the cross girder and T1，T2 was ensured while by using 5 200 t/m tower crane，the construction concept of the " segment being prefabricated in plant and assembled in site" was realized and the the construction period was shortened by 1 /3．
Liu Qiong，Huang Caiping， etc． Experimental Research on the Load Carrying Performance of Steel － concrete Junction in Box Girder of Cable － stayed Bridge［J］．Journal of Railway Engineering Society，2009( 9) : 46 －49．
2011, Vol. 28 
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