An adjustable external prestressed steel cable anchoring device

Abstract

The invention discloses an adjustable external prestressing steel cable anchoring device. The adjustable external prestressing steel cable anchoring device comprises an anchoring steel plate (2); an anchor backing plate (5) is arranged on the anchoring steel plate (2); a supporting steel plate (3) is arranged on one side of the anchor backing plate (5), and an anchorage device (8) is arranged on the other side of the anchor backing plate (5); the supporting steel plate (3) and the anchoring steel plate (2) are perpendicularly and fixedly connected; the supporting steel plate (3), the anchor backing plate (5) and the anchorage device (8) are provided with through holes correspondingly; and a gear sleeve device is arranged between the anchoring plate (2) and the supporting plate (3) and comprises a first sleeve structure and a second sleeve structure, and the first sleeve structure and the second sleeve structure are in matched connection through a thread. According to the adjustable external prestressing steel cable anchoring device, the stress magnitude of the external prestressing steel cable anchoring device can be adjusted through adjustment of the gear sleeve device.

Description

technical field [0001] The invention belongs to the technical field of bridge engineering construction, and more specifically relates to an adjustable external prestressed steel cable anchoring device. Background technique [0002] Bridge reinforcement is to improve the bearing capacity and service performance of components and even the entire structure through certain measures. There are many ways to strengthen bridges. Among them, external prestressing is a method of active reinforcement technology, which has a good reinforcement effect. , Simple construction and other advantages. [0003] However, there is a significant shortcoming in external prestressed reinforcement, which is specifically manifested in the loss of effective stress of the steel cable due to temperature, metal creep and cable relaxation after the prestressed steel cable is anchored. Therefore, after a period of time, the wire rope needs to be re-tensioned to increase the wire rope tension. On the one h...

AI Technical Summary

Problems solved by technology

On the one hand, there are no indications and warnings of prestress loss, resulting in potential safety hazards in the bridge structure; on the other hand, the process of re-tensioning requires the use of special equipment such as jacks, and the reserved length of steel cables after anchoring may not be enough, resulting in the need to replace them again Steel cable, large amount of work

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