Self-resetting multi-section prefabricated assembled pier and construction method

The self-resetting multi-segment pier technology, which uses prefabricated segment splicing and shallow socket connection, solves the problems of poor terrain adaptability and insufficient seismic performance in mountainous construction, and achieves efficient and low-cost pier construction and improved seismic performance.

CN121675302APending Publication Date: 2026-03-17CHONGQING JUNENG CONSTR GRP ROAD & BRIDGE ENG CO LTD +3
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Patent Information

Application Number
CN202511901732.2
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-12-16
Publication Date
2026-03-17

AI Technical Summary

Technical Problem

Existing multi-segment precast bridge piers have poor terrain adaptability, are inconvenient to construct in mountainous areas, have insufficient seismic performance, insufficient joint stability and positioning accuracy, are difficult to control in terms of cost and schedule, and have poor self-resetting ability.

Method used

The method of prefabricated segment splicing and shallow socket connection, combined with unbonded prestressed tendons and mixed reinforcement, provides self-resetting capability, improves seismic performance and overall stiffness. The formwork is prefabricated in the factory and assembled on site, and the tenon structure and grouting sleeve are used for precise positioning and connection.

Benefits of technology

It improves the integrity, rigidity, and bearing capacity of bridge piers, reduces construction costs and time, enhances seismic performance and self-resetting ability, adapts to construction in narrow and complex terrain, and reduces the difficulty and cost of post-earthquake repair.

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Abstract

The invention discloses a self-resetting multi-section prefabricated assembled pier and a construction method, the self-resetting multi-section prefabricated assembled pier comprises a prefabricated cover beam, a pier column and a pier bearing platform, the pier column is formed by splicing a plurality of prefabricated sections, and is connected with the prefabricated cover beam through the prefabricated section located at the top; the prefabricated bent cap is connected with the pier bearing platform through a prefabricated section located at the bottom in a bell and spigot joint mode, and the non-adhesive prestressed tendons are connected with the prefabricated bent cap and the pier bearing platform and provide self-resetting capacity for the pier. According to the multi-section prefabricated assembled pier with the self-resetting capacity and the construction method, the formworks are prefabricated in a unified mode in a factory, the efficiency is improved while the prefabrication and construction cost is reduced, the mode of prefabricated section splicing and shallow socket connection is adopted, construction in narrow and complex terrains is facilitated, prestressed tendons used for self-resetting are arranged, and the construction efficiency is improved. The overall anti-seismic performance is improved, the integrity, rigidity and bearing capacity of the assembled pier are improved, the service life is prolonged, and meanwhile the maintenance cost is reduced.
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