Underground pipe gallery rapid construction trolley, formwork and construction method

CN122169526APending Publication Date: 2026-06-09CCCC SECOND HARBOR ENGINEERING CO LTD +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CCCC SECOND HARBOR ENGINEERING CO LTD
Filing Date
2024-12-06
Publication Date
2026-06-09

AI Technical Summary

Technical Problem

In existing underground utility tunnel construction, the embedded structures are easily blocked by concrete grout, resulting in complex and inefficient construction. In particular, cleaning is difficult during the installation of cable supports, which requires a lot of manpower.

Method used

The system employs a non-removable formwork and an inner formwork trolley. The inner formwork support of the inner formwork trolley is connected to the non-removable formwork via an adjustable connecting rod. Pre-embedded steel plates are fixed with nuts, which are used to connect cable supports and truss reinforcement at different stages. Combined with the outer formwork sliding formwork trolley, it enables rapid formwork erection and dismantling.

Benefits of technology

It improved construction efficiency, reduced the time for erecting and dismantling formwork, simplified the installation process of cable supports, saved labor, and improved overall construction efficiency.

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Abstract

This invention provides a rapid construction trolley, formwork, and construction method for underground utility tunnels. It includes an inner formwork trolley, whose inner formwork support is connected to a non-removable formwork via multiple adjustable connecting rods. Pre-embedded steel plates are embedded within the non-removable formwork and fixedly connected to multiple nuts. Nuts near the outer edge are connected to the adjustable connecting rods before pouring and to cable supports after pouring. Nuts near the inner edge are fixedly connected to the reinforcing steel bars of the truss. This invention improves construction efficiency by utilizing the non-removable formwork, saving time required for formwork erection and dismantling, and allowing for early dismantling of the inner formwork trolley, further enhancing construction efficiency. The pre-embedded steel plates and nuts within the non-removable formwork facilitate formwork erection, fixed installation of the reinforcing steel bars, and subsequent installation of cable supports, further improving construction efficiency. This invention significantly improves construction efficiency and saves labor, especially for the embedding of cable support components and subsequent cable support installation.
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