A kind of external prestressed reinforcement expansion anchor box of cover beam and reinforcement method
An external prestressing and anchoring box technology, applied in bridge reinforcement, bridges, bridge construction, etc., can solve problems such as insufficient prestressing, effective stress reduction, structural diseases, etc., to achieve simple and convenient reinforcement operations, ensure stability, and ensure reliability controlling effect
Active Publication Date: 2018-10-30
HUBEI UNIV OF TECH
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Problems solved by technology
Due to the unavoidable loss of prestress after the prestressed steel tendons are stretched in the project, the structure often suffers from defects, deflection and cracks. One of the important reasons is that the effective stress of the internal prestressed steel tendons decreases, resulting in insufficient prestress, and The conventional anchoring system cannot stretch the prestressed steel tendon again, that is, it is very difficult to increase the effective stress in the prestressed steel tendon again
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[0037] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not constitute a conflict with each other.
[0038] figure 1 It is a cross-sectional view of an external prestressed reinforcement expansion anchor box of a cover beam according to an embodiment of the present invention. figure 2 It is a schematic structural diagram of an external prestressed reinforcement expansion anchor box for a cover beam according to an embodiment of the present invention. Such as figure 1 and figure 2 As shown...
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The invention discloses an external prestressed reinforcement and expansion anchoring box for a cover beam. The anchoring box comprises an anchoring box rear plate (1), an anchoring box front plate (2) and an anchoring box bottom plate (4), the anchoring box front plate (2) is provided with a first limiting steel plate (501) and a second limiting steel plate (502), one end of the anchoring box rear plate (1) is provided with a first guide slot plate (601) and a second guide slot plate (602), and the other end of the anchoring box rear plate (1) is provided with a third guide slot plate (603) and a fourth guide slot plate (604). The first limiting steel plate (501) is matched with the first guide slot plate (601) and the second guide slot plate (602), and the second limiting steel plate (502) is matched with the third guide slot plate (603) and the fourth guide slot plate (604), so that a chamber is formed. A chamber partition plate (8) is arranged between the anchoring box front plate(2) and the anchoring box rear plate (1). The invention also discloses a reinforcement method for the cover beam. According to the external prestressed reinforcement and expansion anchoring box for the cover beam, the cover beam is reinforced through a first inner cavity and a second inner cavity, and it is ensured that the prestressing force can be enhanced by means of tensioning again after theprestressing force is lost.
Description
technical field [0001] The invention belongs to the technical field of bridge road construction, and more specifically relates to an expansion anchor box and a reinforcement method for external prestressed reinforcement of a cover beam. Background technique [0002] The cover beam is an important component connecting the upper and lower in the bridge structure, which plays the role of transferring the load of the upper structure to the lower structure. However, with the continuous increase of traffic volume, the load level of many bridge cap beams can no longer meet the actual needs, and they are faced with the problem of demolition and reconstruction; coupled with the defects in design, construction, operation, maintenance management and other aspects in actual operation, large-scale 1. The overload of heavy vehicles makes the cover girder bear greater local pressure, which leads to various diseases of the cover girder structure in some bridges. Whether it is to avoid demo...
Claims
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IPC IPC(8): E01D22/00E01D19/02
CPCE01D19/02E01D22/00
Inventor 高泽宇
Owner HUBEI UNIV OF TECH