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| Application of Temporary Buttress in Erecting Large Span Steel Truss Arch Bridge |
| WANG Xiao － jing |
| The Second Engineering Co． Ltd，China Zhongtie Major Bridge Engineering Group Co． Ltd，Nanjing，Jiangsu 210015，China |
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Abstract Research purposes: The local stress and deformation of the member bar of the steel girder of the large steel truss arch bridge in the course of the erection are bigger than those in the usage course of the bridge． Therefore，the temporary facility like the suspension cable tower is often used for construction of such kind of bridge． The temporary buttress has never been used for construction of such kind of bridge in China． As the Weiyi Bridge in Liuzhou has features of the big span of the steel truss arch and the poor lateral stability，the research is done on the key construction technologies of this bridge for using the buttress to erect the large span steel truss arch bridge．
Research conclusions: As the simplest and the most commonly － used means，the temporary buttress can be used as the external auxiliary member of the steel truss arch for erecting the large span steel truss arch bridge，and by using it，the requirement of the linear adjustment for the steel truss arch can be met． By using active control technologies for controls of the vertical and horizontal shifts and the elevation，the arch and tie bar of the steel truss arch can be gathered up，the up and down operation of the whole steel truss arch bridge can be avoided and the measures for the closure adjustment of the steel truss arch bridge can be simplified．
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Received: 28 November 2012
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2013, Vol. 30 
