| With the fast development of communication construction in our county, mangy existing bridges needs to be demolitioned and reconstructioned because the lack of headroom under the bridge .The demolition and reconstruction of existing bridges on the cross, will face a long construction period, high cost and environmental impact on the surrounding .How to solve the problem? The synchro jacking-up bridge technology came into being. It provides a bridge builder who is quick and affordable way to transform, to make the project cost and the impact on the surrounding environment to a minimum.And the translation technology, to make the bridge superstructure to the horizontal movement. Combination of both, transformation of the old bridge has unparalleled advantages.It is a broad prospect of new technology. But now ,Synchro jacking-up and translation technology of engineering design and construction depends on the past experience, especially in the bridge from the great, complex structures, long distance ,the lack of scientific and theoretical basis. Many issues need to be further studied.The paper takes a main-span 64 meters, weight 4800 tons of arch bridge as a background.It uses the general finite element procedure to carry on the analysis.It analysis the influence of rising insynchronism to the superstructure supporting capacity,and the reaction of the supports and the influence of load change to the original bridge pier,the temporary pillar and the pile foundation endogenic force..It provides a useful solution for large-scale lifting and translation.The auther mainly applies MIDAS software to analyse various jacking-up schems and obtain major monitor position in every scheme,which will supply some realiable method in construction control.The auther expects the research of this technique can be promoted for the large-scale lifting bridge and translation.And the paper can give assistance for jacking-up and translation technology futher spreading and development. |
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