Composite anchoring structure on guyed tower end of cable-stayed bridge

Abstract

The invention relates to a composite anchoring structure on the guyed tower end of a cable-stayed bridge. A plurality of steel anchor boxes with end box chambers are overlapped, and cast concrete with reinforcing bars penetrating through pinholes is arranged on the end box chambers. The box chambers are arranged on both ends of a steel anchor box and share the same end plate, a faceplate is arranged correspondingly opposite to the end plate, the end plate and the faceplate are connected by lateral plates on both sides to form a box chamber structure, the lateral plates are provided with a plurality of pinholes, and through holes are arranged on the lower part of the faceplate so that guyed sleeves can penetrate through. The invention accelerates the construction speed of a bridge tower, is convenient to manufacture, and has favorable durability.

Description

technical field [0001] The invention belongs to the technical field of bridge engineering, and in particular relates to an anchoring structure of a cable-stayed tower end of a cable-stayed bridge. Background technique [0002] The cable force of the long-span cable-stayed bridge is relatively large, so that the anchorage area of ​​the cable tower is subjected to a strong concentrated force. If the prestressed cable tower anchoring method is used, a considerable amount of hoop prestressing force needs to be configured to meet the force requirements, and the difficulty of construction and later maintenance will increase accordingly. Therefore, long-span cable-stayed bridges are anchored by steel anchor boxes or steel anchor beams combined with concrete tower walls. Steel anchor boxes or steel anchor beams are used to bear most of the horizontal force, and concrete is used to bear most of the vertical force. The advantages of the two materials meet the stress requirements of t...

AI Technical Summary

Problems solved by technology

For example, the exposed steel anchor box must be prestressed in the hoop direction on the tower wall, adding a large number of high-altitude prestressing construction links, making the construction speed slower

Although the built-in steel anchor box structure can control the width of the crack through reinforcement, the durability of the structure will inevitably be reduced if the reinforcement is corroded by the atmospheric environment for a long time at the crack.

In addition, the steel bars of the cable tower are densely packed, and the cable sleeves of the built-in steel anchor box will collide with the steel bars when passing through the tower wall, which is very difficult to deal with.

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