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Method for reinforcing midspan of ordinary three-span steel continuous beam bridge
The invention discloses a method for reinforcing a midspan of an ordinary three-span steel continuous beam bridge. The method comprises the following steps: building a construction operation platform; treating the surface of a midspan bottom plate; jacking up two side spans by virtue of a jack and then dismantling a side span support seat; lowering the jack to be lower than the side span support seat; calculating to obtain the lowered value of the jack relative to the side span support seat; unloading dead load bending moment of the midspan, and then pasting and fixing with a steel plate; jacking up the edge spans by virtue of the jack, and reinstalling the dismantled side span support seat at the original position; and lowering the jack, relocating the edge spans on the side span support seat, and then shifting out the jack. According to the method, by unloading the dead load bending moment of the midspan and then pasting and fixing with the steel plate, the steel plate can participate into the activities of bearing the load of a car and then adding dead load, can also participate into the activity of bearing the dismantled dead load bending moment; the bending bearing capacity of the main girder can be effectively improved; meanwhile, the material properties of reinforcing steel plate can be put into a relatively full play; and the bridge safety is not affected by lowering the jack in the construction process.
Method for reinforcing midspan of ordinary three-span steel continuous beam bridge
The invention discloses a method for reinforcing a midspan of an ordinary three-span steel continuous beam bridge. The method comprises the following steps: building a construction operation platform; treating the surface of a midspan bottom plate; jacking up two side spans by virtue of a jack and then dismantling a side span support seat; lowering the jack to be lower than the side span support seat; calculating to obtain the lowered value of the jack relative to the side span support seat; unloading dead load bending moment of the midspan, and then pasting and fixing with a steel plate; jacking up the edge spans by virtue of the jack, and reinstalling the dismantled side span support seat at the original position; and lowering the jack, relocating the edge spans on the side span support seat, and then shifting out the jack. According to the method, by unloading the dead load bending moment of the midspan and then pasting and fixing with the steel plate, the steel plate can participate into the activities of bearing the load of a car and then adding dead load, can also participate into the activity of bearing the dismantled dead load bending moment; the bending bearing capacity of the main girder can be effectively improved; meanwhile, the material properties of reinforcing steel plate can be put into a relatively full play; and the bridge safety is not affected by lowering the jack in the construction process.
Method for reinforcing midspan of ordinary three-span steel continuous beam bridge
XUE XINGWEI (author) / ZHANG MINJIANG (author) / ZHANG HAI (author) / WANG ZECHENG (author)
2015-05-27
Patent
Electronic Resource
English
IPC:
E01D
BRIDGES
,
Brücken
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