Bridge half-range pass-keeping construction method and half-range bridge beam slab stabilizing device

Abstract

The invention relates to the technical field of bridge rebuilding construction, and provides a bridge half-range pass-keeping construction method for carrying out half-range pass-keeping construction operation on a bridge with a bridge floor formed by transversely splicing a plurality of beam plates. Firstly, a lane on one side of an old bridge is dismantled and recorded as a dismantled half range, and a lane on the other side of the old bridge is kept still and recorded as a pass-keeping half range; inward extrusion stress is applied to the left side and the right side of the pass-keeping half-range bridge deck; then, the half range of the new bridge is constructed at the original position where the half range is dismantled, and after the half range of lane of the new bridge is open to traffic, the extrusion stress on the half range of bridge floor is cancelled; and finally, the pass-keeping half range of the old bridge is dismantled, and the other half range of the new bridge is built on the original site. Meanwhile, the invention further provides a half-range bridge beam plate stabilizing device matched with the applied extrusion stress. According to the scheme, the traffic capacity of the road can be kept in the whole process of bridge construction. And the dangerous situation caused by instability of the communication keeping part of the old bridge is avoided.

Description

technical field [0001] The invention relates to the technical field of bridge renovation construction, in particular to a construction method for half-width protection of old bridges, and a supporting device for stabilizing half-width bridge girder slabs. Background technique [0002] Renovation and flipping of bridges on existing roads is different from bridge construction on brand-new roads. In many cases, the original bridges have to maintain a certain traffic capacity during the renovation period. At this time, it is generally carried out to remove one side of the lane, that is, half of it, and then maintain the capacity of the other half to allow all original vehicles to enter the reserved half of the lane for traffic. [0003] However, many old bridges that need to be rebuilt and covered are different from the current integrated box girder bridges. Instead, multiple beams and slabs are spliced ​​horizontally, that is, in the left and right directions to form the bridge...

AI Technical Summary

Problems solved by technology

Removing half of the bridge deck and concentrating the vehicles on the other half to keep the vehicles unblocked is the half-width construction. The traffic flow becomes larger, which will easily cause a large bending moment on the beam plate of the bridge, or the sudden braking of the vehicle will exert force on the bridge deck. In the case of a large reaction force, the wet joints of the bridge slab are cracked under force, and even the entire beam slab moves in translation

It is difficult to guarantee the safety of Baotong's half-width bridge during construction

[0004] The general solution in the prior art is to use steel plates to directly fix the girder and slab of the Baotong half-width bridge, and the steel plates are fixed by expansion bolts. The damage affects the normal opening of half of the pass

The device can only be installed on the bottom surface of the bridge. It is very difficult for personnel to hoist the installation and construction, and it is not easy to dismantle the device later.

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