A method for mid-span closure of two hanging baskets working together

By using a double-hanging basket collaborative operation method for mid-span closure, the problems of slow construction process connection and extended construction period were solved, achieving efficient and safe mid-span closure construction of bridges, and improving construction efficiency and project quality.

CN122304291APending Publication Date: 2026-06-30CHINA GEZHOUBA (GRP) FIRST ENG CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CHINA GEZHOUBA (GRP) FIRST ENG CO LTD
Filing Date
2026-04-27
Publication Date
2026-06-30

AI Technical Summary

Technical Problem

The existing mid-span closure process suffers from problems such as slow construction sequence, extended construction period, high construction safety risks, and increased costs. In particular, in the cantilever casting construction of long-span continuous rigid frame bridges, the asymmetric adjustment method leads to low construction efficiency and difficulty in quality control.

Method used

The mid-span closure method using double hanging baskets involves moving the main bodies of the hanging baskets on both sides of the closure section in the center and connecting them with sliding beams to form an independent load-bearing track. After disconnecting the original connection, the formwork system is moved synchronously. The docking and movement of the formwork system are achieved by using a pull-locking mechanism and a drive device to construct a closed pouring space.

Benefits of technology

This technology enables closure construction without retracting the hanging basket or dismantling the formwork, significantly shortening the construction period, reducing costs, simplifying high-altitude operation procedures, and improving construction efficiency and project quality.

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Abstract

This invention provides a method for mid-span closure using a double-hanging-basin collaborative operation. The method involves moving the main bodies of the hanging baskets on both sides of the closure section to their maximum centering distance; connecting the two sliding beams as a whole and anchoring them to the pre-formed segment; disconnecting the sliding beams from the main truss to form an independent load-bearing track; disconnecting the formwork system from the main truss and suspending it on the sliding beams; synchronously moving the formwork system to the closure section position and fixing it to the main truss to create a closed pouring space; and finally, positioning the inner formwork and pouring concrete. This invention fully utilizes existing hanging basket components for in-situ reuse, eliminating the need for additional closure scaffolding. It avoids the cumbersome procedures of retracting the hanging baskets and reinstalling the formwork in traditional processes. While significantly shortening the construction period and reducing costs, it enhances the structural rigidity and safety of the construction system and effectively ensures the construction accuracy and appearance quality of the closure section.
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