Research on Key Technology for Cross Slope Reconstruction of Cast-in-place Concrete Box Girder Bridge in Expressway
In view of the width and cross slope of a cast-in-place box girder bridge in expressway not meeting the current actual demand of traffic,four kinds of reconstruction schemes are proposed,such as speed limiting,direct bridge deck paving,cutting beam jacking and rotating deck paving,and increasing section method with bridge deck participating in stress.The stress state of the structure under the corresponding scheme is analyzed.The result shows that the most reasonable reconstruction scheme of the structure stress is determined as the latter two,such as the cutting beam jacking and rotating deck paving(suitable for the first segment),and increasing section method with bridge deck participating in stress(suitable for the second segment).The research result can provide the reference for the reconstruction of similar projects in the future.
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