一种既有轨道交通高架区间承台的帮宽结构
By constructing a widened pier around the existing elevated rail transit section pier and connecting them with prestressed steel strands to form an integral load-bearing structure, the problem of uneven bridge settlement caused by the separation of old and new concrete was solved, and the stable support and safe renovation of the pier structure were achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHINA RAILWAY 24TH BUREAU GROUP CO LTD
- Filing Date
- 2025-08-01
- Publication Date
- 2026-07-17
AI Technical Summary
In the renovation and construction of existing elevated sections of rail transit, the existing technology increases the load-bearing capacity by pouring concrete around the existing abutment to expand its size. However, it is difficult to form an integral load-bearing system between the old and new concrete, which leads to the separation of the old and new concrete structures during long-term operation, causing uneven settlement of the bridge and even safety accidents.
A new, widened foundation is constructed around the existing foundation and connected by prestressed steel strands to form an integral structure. The existing foundation and the widened foundation work together to bear the load, and the crisscrossing prestressed steel strands improve the overall integrity and load-bearing capacity.
This design achieves good integrity and load-bearing capacity between the existing and widened foundations, ensuring stable support for the bridge structure above and avoiding uneven settlement caused by the separation of old and new concrete, thus ensuring construction safety.
Smart Images
Figure CN224514038U_ABST
Abstract
Claims
1. A widening structure of a viaduct deck of an existing rail transit elevated section, for widening an existing deck, characterized in that: The structure includes a widened foundation surrounding the existing foundation. The widened foundation and the existing foundation are connected by prestressed steel strands to form an integral structure. The two ends of the prestressed steel strands are anchored to the corresponding existing foundation or the widened foundation. A certain gap is left between the existing foundation and the widened foundation, and this gap is filled and compacted by pouring concrete.
2. The widened structure of a support platform of an elevated section of an existing rail transit according to claim 1, characterized in that: Several prestressed steel strands are arranged in a crisscross pattern between the existing foundation and the widened foundation, and the prestressed steel strands are misaligned with each other.
3. The widened structure of a support platform of an elevated section of an existing rail transit according to claim 1, characterized in that: Two or more layers of prestressed steel strands are provided along the height direction of the existing foundation and the widened foundation, with the prestressed steel strands in each layer being evenly spaced.
4. The widened structure of a support platform of an elevated section of an existing rail transit according to claim 1, characterized in that: The two ends of the prestressed steel strand are anchored by sealing concrete.
5. The widened structure of a support platform of an elevated section of an existing rail transit according to claim 1, characterized in that: Pipes for the prestressed steel strands to pass through are provided in the existing foundation and the widened foundation.
6. The widened structure of a support platform of an elevated section of an existing rail transit according to claim 1, characterized in that: A new pile foundation is installed below the widened pier.