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Simply supported hollow plate girder bending resistance reinforcement method
A simply supported hollow plate girder bending resistance reinforcement method has the construction steps of demounting ancillary facilities of a bridge deck, chiseling hinge joints between girders and a bridge deck cast-in-situ layer, and retaining the girders; setting up operation platforms used for construction to carry out surface treatment on the girders; jacking the girders through jacks under the precondition that safety of the girders is guaranteed; removing mid-span bending moments of dead load of the girders; sticking steel plates after the bending moments of dead load of the girders are removed; pouring concrete to the hinge joints and the bridge deck cast-in-situ layer; synchronously uninstalling the jacks after the curing time is reached, so that the girders are located on supports, and then removing the jacks; pouring concrete to the hinge joints and the bridge deck cast-in-situ layer; restoring the ancillary facilities of the bridge deck, and completing the bending resistance reinforcement of the girders. The simply supported hollow plate girder bending resistance reinforcement method has the beneficial effects that the steel plates are stuck after the mid-span bending moments of dead load of the girders are removed, thus the steel plates can not only participate in the bearing of the load of automobiles and later-imposed dead load, but also participate in the bearing of the removed bending moments of dead load, so that the bending resistance bearing capacity of the girders can be improved; the steel plates are stuck when the strain stress of rebars at mid-span tensile regions of the girders is decreased, so that the material performance of the reinforcing steel plates can be fully exerted better.
Simply supported hollow plate girder bending resistance reinforcement method
A simply supported hollow plate girder bending resistance reinforcement method has the construction steps of demounting ancillary facilities of a bridge deck, chiseling hinge joints between girders and a bridge deck cast-in-situ layer, and retaining the girders; setting up operation platforms used for construction to carry out surface treatment on the girders; jacking the girders through jacks under the precondition that safety of the girders is guaranteed; removing mid-span bending moments of dead load of the girders; sticking steel plates after the bending moments of dead load of the girders are removed; pouring concrete to the hinge joints and the bridge deck cast-in-situ layer; synchronously uninstalling the jacks after the curing time is reached, so that the girders are located on supports, and then removing the jacks; pouring concrete to the hinge joints and the bridge deck cast-in-situ layer; restoring the ancillary facilities of the bridge deck, and completing the bending resistance reinforcement of the girders. The simply supported hollow plate girder bending resistance reinforcement method has the beneficial effects that the steel plates are stuck after the mid-span bending moments of dead load of the girders are removed, thus the steel plates can not only participate in the bearing of the load of automobiles and later-imposed dead load, but also participate in the bearing of the removed bending moments of dead load, so that the bending resistance bearing capacity of the girders can be improved; the steel plates are stuck when the strain stress of rebars at mid-span tensile regions of the girders is decreased, so that the material performance of the reinforcing steel plates can be fully exerted better.
Simply supported hollow plate girder bending resistance reinforcement method
XUE XINGWEI (author) / WAN LIANG (author)
2015-08-05
Patent
Electronic Resource
English
IPC:
E01D
BRIDGES
,
Brücken
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