Combined prefabricated bridge pier connection structure and its construction method

Abstract

The invention relates to a combined precast bridge pier connecting structure and a construction method thereof. The connecting structure is a component for connecting each precast segment of the precast bridge pier. The two ends of the prefabricated segment are provided with wet joint cavities, and a plurality of grouting channels communicating with the wet joint cavities at the two ends are arranged inside the prefabricated segment. The connecting structure comprises an upper prefabricated segment, a lower prefabricated segment and a UHPC tenon. The wet joint cavity of the upper and lower prefabricated segments and the grouting passage enclose a cavity for pouring to form the UHPC tenon. The UHPC tenon is provided with a reinforcing bar cage, and the two ends of the reinforcing bar cage are respectively located in the grouting passage of the upper and lower prefabricated segments. The invention also includes a construction method for prefabricating and assembling bridge piers by adopting the connecting structure. The technical proposal of the invention not only enhances the compression resistance and tensile resistance of the joint of the prefabricated bridge piers segments, but also improves the mechanical property of the whole bridge pier, has simple structure, short construction period and strong seismic performance.

Description

technical field [0001] The invention belongs to the field of bridge engineering, and in particular relates to a combined prefabricated bridge pier connection structure and a construction method thereof. Background technique [0002] With the vigorous development of bridge construction in our country, the construction environment of bridges has attracted more and more attention from all walks of life, especially bridges built in cities. Comparing with the traditional cast-in-place concrete bridge, the section-assembled piers have the advantages of short construction period, prefabricated components in the precast yard, and less interference from the surrounding environment. Among them, the connection mode and connection quality between prefabricated and assembled pier segments directly affect the mechanical performance and seismic performance of the pier as a whole. Therefore, a reliable and simple segment connection method is the key to the application of prefabricated pier...

AI Technical Summary

Problems solved by technology

The existing prefabricated assembled pier segment connection methods are relatively few, and the specific implementation methods are relatively cumbersome, and the connection quality is difficult to guarantee

[0003] CN107675610A discloses a structure and method for segmental connection of prefabricated assembled bridge piers. By applying ultra-high performance concrete UHPC between prefabricated bridge piers, the compressive and tensile properties of ultra-high performance concrete UHPC are used to solve the problem of prefabricated bridge piers. The problem of weak segmental connections

However, it uses cast-in-place UHPC joints to realize the connection of prefabricated sections. Although the connection structure and method of prefabricated pier sections are improved, the compressive and tensile properties of the joints of prefabricated pier sections are improved, but the structure Complex, long construction period, uneven distribution of stress and strain at the joints, poor overall mechanical and seismic performance of the bridge pier

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