Construction method of combined bridge pier suitable for alpine region

By using a combined structure of ordinary concrete core and ultra-high performance concrete outer ring in bridge piers in high-altitude and cold regions, and combining it with demolding technology for precast bridge pier outer ring and special inner mold, the problems of freeze-thaw damage and high cost of bridge piers have been solved, and economical and efficient bridge pier construction has been achieved.

CN117488661BActive Publication Date: 2026-05-26CHINA RAILWAY CONSTR PROPERTY TECH CO LTD +1
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Patent Information

Application Number
CN202311379701.6
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2023-10-24
Publication Date
2026-05-26
Estimated Expiration
2043-10-24

AI Technical Summary

Technical Problem

In cold regions, bridge piers constructed with ordinary concrete are susceptible to freeze-thaw damage, while using ultra-high performance concrete increases project costs.

Method used

The bridge adopts a composite pier structure. The inner core of the pier is made of ordinary concrete, while the outer ring of the pier is made of ultra-high performance concrete and is prefabricated in the processing plant. The inner surface of the outer ring of the pier is set with pits, which are formed by combining a special inner mold or bubble wrap to facilitate demolding. The outer ring of the pier is used as a template on the construction site.

Benefits of technology

It not only met the freeze-thaw resistance requirements of the bridge piers, but also reduced the amount of ultra-high performance concrete used, thus lowering project costs, shortening the construction period, and improving the strength and demolding efficiency of the bridge piers.

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Abstract

This invention discloses a composite bridge pier suitable for high-altitude and cold regions, comprising an inner core and an outer ring. The outer ring encloses the inner core and is made of ultra-high-strength concrete. The inner core is cast on-site from ordinary concrete, while the outer ring is prefabricated in a factory. This composite bridge pier uses only the more expensive ultra-high-strength concrete in the outer ring, which meets the requirements for freeze-thaw resistance while reducing the amount of ultra-high-strength concrete used, thus balancing project costs. Furthermore, the prefabricated outer ring can be directly used as a formwork for the bridge pier on-site, eliminating the material costs and installation / disassembly costs associated with traditional formwork construction.
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