Connecting method and device for bridge-lifted thin-wall hollow pier and original pier column
A thin-walled hollow pier and connecting device technology, which is applied in bridges, bridge parts, bridge maintenance, etc., can solve problems such as inability to adapt to bridge jacking technology and unfavorable force, and achieve improved concrete quality, high connection reliability, and improved The effect of ductility
Inactive Publication Date: 2013-03-27
HOHAI UNIV
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Problems solved by technology
After the bridge is raised, the stress under the horizontal force is more unfavorable. The ordinary method of connecting only the longitudinal steel bars cannot meet the requirements of the bridge jacking technology. Therefore, the bridge jacking connection technology must be innovated.
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[0021] Below in conjunction with illustration, device of the present invention and construction method are further described:
[0022] Such as figure 1 As shown, the connection device between the thin-walled hollow pier and the original pier column after the bridge is lifted includes the outer steel plate 4, the inner steel plate 5, the stud 6 and the cross support 7, and the outer steel plate 4 is provided with bleeding holes 9 and grouting The holes 8 are uniformly fixed with the pegs 6 inside the outer steel plate 4 and the inner steel plate 5 respectively, and the outer steel plate 4 and the inner steel plate 5 are reinforced and connected by the cross support 7 .
[0023] The connection method of the connection device between the thin-walled hollow pier and the original pier column after the bridge is jacked up includes the following steps:
[0024] The first step, the preparation for heightening the pier column - before the heightening connection of the pier column, fir...
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The invention discloses a bridge reconstruction and reinforcement technology and particularly relates to a connecting technology for a bridge-lifted thin-wall hollow pier. The connecting device provided by the invention is composed of vertical reinforcements, reinforcement stirrups, self-compaction micro-expansion concrete, exterior steel plates, interior steel plates, toggle pins and cross supports. The vertical reinforcements are same as the vertical reinforcements used on the original pier column structure in size and amount; the reinforcement stirrups are closed, and the density of the reinforcement stirrups is increased in the full range of a heightening section; the toggle pins are welded on the surfaces of the exterior steel plates and the interior steel plates, and meanwhile, the exterior steel plates and the interior steel plates can be used as templates for pouring the concrete at the heightening section; the exterior steel plates are provided with grouting holes and bleeding holes; and the interior steel plates are crossly supported and reinforced. By using the connecting technology provided by the invention, the steel plate and concrete combination stress performance can be improved, connection reliability between the heightening part and the original pier column is high, and the requirements for strength, rigidity and stability can be met, so that the connecting technology is wide in application range.
Description
technical field [0001] The invention relates to a bridge reconstruction and reinforcement technology, in particular to a connection technology of a thin-walled hollow pier after the bridge is lifted, and belongs to the field of civil engineering bridge engineering reconstruction. Background technique [0002] With the rapid development of my country's transportation industry, the operating capacity of vehicles is also increasing, and their operating heights are also increasing accordingly. This makes the clear height of a considerable number of over-the-line bridges and channel bridges unable to meet the needs of the normal operation of the under-bridge lines. The traditional method is to demolish the original bridge and build a new bridge that meets the requirements, but this method will cause a great waste of resources, and the construction period is long, and the social and economic effects are poor. If the substructure and superstructure of the original bridge can be use...
Claims
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Login to View More IPC IPC(8): E01D22/00E01D19/02
Inventor 袁爱民程宏斌吉伯海吴闻秀何雨钱守龙
Owner HOHAI UNIV