A method for composite reinforcement of existing building dense rib floor
By tensioning prestressed steel strands at the top and bottom of the ribbed floor slab, inserting hook steel bars and grouting anchors, and combining this with UHPC concrete reinforcement, the problem of structural damage in the ribbed floor slab was solved, achieving efficient reinforcement and improved structural stability.
CN117166804BActive Publication Date: 2026-06-12SHANGHAI URBAN CONSTRUCTION MUNICIPAL ENGINEERING (GROUP) CO LTD
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- SHANGHAI URBAN CONSTRUCTION MUNICIPAL ENGINEERING (GROUP) CO LTD
- Filing Date
- 2023-08-14
- Publication Date
- 2026-06-12
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Figure CN117166804B_ABST
Abstract
The application discloses a method for composite reinforcement of existing building dense rib floor, comprising the following steps: drilling holes on the upper and lower parts of the wall and the original cast-in-place beam of the dense rib floor to be reinforced, and prestressed steel strand is passed through the holes and the ends are anchored; a plurality of vertical through holes are drilled in the hollow brick area of the dense rib floor at intervals, and grouting anchor rods are correspondingly inserted from top to bottom in the vertical through holes; a plurality of grouting holes are arranged on the middle pipe wall of the grouting anchor rod at intervals; high-pressure concrete slurry is injected into the grouting anchor rod, and the concrete slurry seeps into the gaps between the hollow bricks after filling the vertical through holes, so that the grouting anchor rod is combined with the hollow bricks to form an integrated whole; UHPC concrete material is used to spray and reinforce the upper and lower surfaces of the dense rib floor; and the prestressed steel strand is tensioned after 1 day of spraying. The application has the advantages that the hollow brick structure can be lifted by the dense rib floor by arranging the grouting anchor rod in the hollow brick structure.
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Citation Information
Patent Citations
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