Stay cable and bridge tower anchored prefabricated prestressed concrete anchor beam structure

Abstract

The utility model discloses a stay cable and bridge tower anchored prefabricated prestressed concrete anchor beam structure, and aims to effectively reduce the steel consumption, the manufacturing, transportation, construction and maintenance difficulty, improve the durability of the structure and effectively reduce the construction cost. The structure comprises a ladder-shaped concrete prefabricated part, the ladder-shaped concrete prefabricated part comprises concrete vertical tower walls vertically extending on the two sides in the transverse direction and concrete anchor beams vertically arranged at intervals, and the two ends of each concrete anchor beam are fixedly connected with the concrete vertical tower walls on the same side; reserved steel bars embedded into cast-in-place concrete of the bridge tower concrete tower wall are arranged on the outer side wall of the concrete vertical tower wall, and the ladder-shaped concrete prefabricated parts are fixedly connected between the two side walls of the bridge tower concrete tower wall through prestressed steel beams distributed in the cross sections of the concrete anchor beams; stay cable anchoring tooth blocks are embeddedin the two ends of each concrete anchor beam.

Description

technical field [0001] The invention relates to an anchorage system for cable-stayed cables and concrete bridge towers, in particular to a prefabricated prestressed concrete anchor beam structure for anchoring cable-stayed cables and bridge towers. Background technique [0002] The anchoring methods of traditional stay cables and concrete bridge towers are generally divided into three anchoring methods, namely prestressed anchorage system, steel anchor beam anchorage system and steel anchor box anchorage system. Conventional prestressed anchorage systems were widely used before 2000, but now domestic steel anchor boxes and steel anchor beams tend to be used. [0003] Different from the conventional steel anchor beam, the prefabricated prestressed concrete anchor beam prefabricates the anchor beam of each stay cable, the anchor tooth plate and the thinner part of the tower wall together, and then uses the tower crane to lift it in place, and then pours the tower wall on site ...

AI Technical Summary

Problems solved by technology

[0007] 2. Manufacturing and transportation difficulties

[0008] The steel anchor box part of the steel anchor beam of the cable-stayed cable needs to be welded with thick shear plates, pressure plates and side plates, and stiffeners must be set inside the steel anchor beam, which is difficult to manufacture. In addition, the steel anchor beam is made of road Transportation is difficult, especially when the bridge is located in a difficult and dangerous mountain area, the transportation cost is very high

[0009] 3. Construction difficulties

[0010] Installed by tower crane, there is conflict between shear nails and ordinary steel bars, and it is difficult to pour concrete

[0011] 4. Difficult to maintain

Steel structure, it is difficult to dehumidify, and the inner space of the steel anchor box anchored by the cable is small, so it is difficult to inspect and maintain; the maintenance cost is high

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