External prestressed reinforcement structure for old bridge and construction method thereof
An external prestressing and reinforcing structure technology, which is applied in the field of bridge and structural engineering in civil engineering, can solve the problems of unclear force transmission path, difficult manufacturing and installation of anchor plates, and achieve uniform force, convenient construction and simple structure. Effect
Active Publication Date: 2014-12-03
CHENGDU BORUIJI BRIDGE TECH
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Problems solved by technology
[0004] The purpose of the present invention is to provide an external prestressed reinforcement structure of an old bridge and its construction method, which solves the problems in the prior art that the force transmission path of the anchor plate is not clear, and the manufacture and installation are relatively difficult
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[0029] Such as Figure 1~3 As shown, the external prestressed reinforcement structure of the old bridge includes an anchor plate 1, a prestressed steel cable 2, a supporting slider 3, a shock absorber 4, and a prestressed anchor set on the bridge body, and the old bridge is T-beam bridge. Specifically, there are more than four anchor pads, all of which are fixed to the webs at the ends of the T-beam. In order to avoid deformation of the anchor pads due to long-term stress, the reinforcement effect of the present invention is not good, so the anchor The backing plate includes a fixed connecting plate 5, a supporting plate 6 arranged at one end of the fixed connecting plate, a cylindrical first pressure-bearing steel pipe 7 arranged on the fixed connecting plate and connected to the supporting plate, and arranged on the fixed connecting plate and the first The ribs 8 between the pressure-bearing steel pipes and the bolt holes 9 arranged on the fixed connecting plate. There are ...
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The invention relates to an external prestressed reinforcement structure for an old bridge and a construction method thereof. The problem that an anchor bearing plate has an unclear force transfer path and the manufacturing and installation are difficult in the prior art are solved. The external prestressed reinforcement structure comprises an anchor bearing plate, a prestressed cable, a supporting slide block, a damping device and a prestressed anchorage device which are arranged on the bridge body, wherein the prestressed anchorage device is fixed with the anchor bearing plate and the supporting slide block; the anchor bearing plate comprises a fixed connecting plate, a supporting plate arranged at one end of the fixed connecting plate, a cylindrical first pressure-bearing steel tube connected with the supporting plate, a ribbed plate arranged between the fixed connecting plate and the first pressure-bearing steel tube, and a bolt hole formed on the fixed connecting plate; and the prestressed cable penetrates through the first pressure-bearing steel tube and is anchored to the supporting plate through an extrusion sleeve. The invention also provides a construction method of the external prestressed reinforcement structure. The external prestressed reinforcement structure is reasonable in design, simple in structure, convenient in construction, high in safety and suitable for popularization, and after the structure is arranged on the bridge, the stability of the bridge can be greatly improved.
Description
Technical field [0001] The invention belongs to the field of bridge and structural engineering in the civil engineering discipline, and specifically relates to an external prestressed reinforcement structure of an old bridge and a construction method thereof. Background technique [0002] At present, for the upper structure of reinforced concrete beam bridge, due to design and construction defects, overload, material deterioration, temperature, stress, and corrosion will all damage the bridge and cause insufficient bearing capacity. The prestressed tie rods are added to the original structure to form a composite structure by installing anchoring measures (anchor pads, support sliders) outside the upper structure of the bridge, and work together under the action of external loads. The load is redistributed between the original structure and the prestressed tie rods to make The prestressed tie rod bears part of the stress. Thereby reducing the original beam stress level and improv...
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IPC IPC(8): E01D22/00
Inventor 杨睿
Owner CHENGDU BORUIJI BRIDGE TECH