Joint connection mode for prefabricated spliced bridge pier with flexible layer arranged at bottom of pier and cushion cap and realization method thereof

Abstract

The invention discloses a joint connection mode for a prefabricated spliced bridge pier with a flexible layer arranged at the bottom of the pier and a cushion cap and a realization method thereof. The flexible layer at the bottom of the prefabricated pier, longitudinal reinforcements extending out from the bottom of the prefabricated pier, pre-buried metallic bellows in the cushion cap, preserved grooves in the top face of the cushion cap and self-compaction high-strength micro-expansion grouting materials grouted through the metallic bellows are involved in the joint connection mode. An overlapped steel plate rubber layer is installed at the bottom of the bridge pier and formed with the bridge pier in a cast and prefabricated mode, the self-compaction high-strength micro-expansion grouting materials are grouted into the pre-buried metallic bellows in the cushion cap and overflow so that the grooves can be filled with the grouting materials, and then the longitudinal reinforcements extending out from the bottom of the prefabricated bridge pier are inserted into the pre-buried metallic bellows until the bottom of the prefabricated bridge pier is inserted into the grooves to be compacted. The construction mode is simple; the bridge pier is formed in a prefabricated mode, in this way, the on-site construction speed of projects is increased, and the quality of the projects is improved; due to the overlapped steel plate rubber layer arranged at the bottom of the prefabricated bridge pier, the ductility of the bridge pier can be obviously improved, and the damage degree of the plastic hinge region of a pier stud is reduced.

Description

technical field [0001] The invention relates to the technical field of rapid bridge construction, and is mainly used for reliable connection and performance improvement of prefabricated assembled piers and bearing platform nodes in the rapid bridge construction process. Background technique [0002] With the development of construction industrialization, the role of prefabricated assembly technology in bridge construction has become increasingly prominent. The bridge rapid construction technology is to prefabricate the main components of the bridge structure in the prefabrication yard, transport the prefabricated components to the bridge construction site by large-scale transportation machinery, and use hoisting equipment to hoist the prefabricated components into place, and only a small number of processes can be completed quickly on site Construction of bridge structures. The construction of prefabricated bridges will greatly reduce the amount of work at the bridge constr...

AI Technical Summary

Problems solved by technology

[0003] At present, the bridge structure design based on the concept of ductile anti-seismic design allows the concrete in the plastic hinge area of ​​the pier to be crushed and severely damaged when a strong earthquake occurs, which is often difficult to repair after the earthquake

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