Research on the Technology of Using Bridge Erecting Machine for Dismantling Cantilever Anchored Beam Bridges Across Existing Lines
For bridges across waterways,railways,highways,etc.,in order not to affect the passage below,it is difficult to dismantle and rebuild most of them.Especially for long-span bridges,how to dismantle safely and efficiently is a topic worth studying.Therefore,combined with the demolition and reconstruction project of Xinhua Bridge,which is located in the bustling downtown of Zhuzhou and spans 9 tracks,the relevant technology of using bridge erecting machine to dismantle cantilever anchored beam bridge across the existing line is studied.Results show that the existing front legs of the bridge erecting machine are transformed into separate legs with left and right independent expansion,so that the left and right separate legs of the bridge erecting machine run on the top of the beam and the surface of the beam with a height difference of 2.8 m,which solves the problem that the bridge erecting machine cannot move horizontally.It is an innovation to adjust the center of gravity axis and lifting center of gravity line to ensure the stability of the beam body.Using the modified bridge erecting machine to remove the cantilever anchored beam bridge across the existing line,it saves 40 d than the original construction period,and is a safe,economic and efficient method of bridge removal,and the relevant experience is worth learning.
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