Variable tension leg shaped pontoon bridge foundation

By adopting a variable tension leg-type irregular floating box bridge foundation in the floating bridge foundation, and utilizing the combination of a variable hydraulic rod system and tension legs, the stability problem of tension leg floating foundations under complex sea conditions was solved, and the wind and wave resistance and stability of the structure were improved.

CN116163197BActive Publication Date: 2026-06-26CHINA RAILWAY BRIDGE SCI RES INST LTD +2
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
CHINA RAILWAY BRIDGE SCI RES INST LTD
Filing Date
2022-12-30
Publication Date
2026-06-26

AI Technical Summary

Technical Problem

Existing tension leg floating foundations cannot adapt to complex sea conditions, have low structural safety, and are prone to instability.

Method used

The irregularly shaped floating box bridge foundation adopts a variable tension leg type. By setting multiple variable hydraulic rod systems and tension legs at intervals around the circumference of the floating box body, the variable hydraulic rod systems can adapt to the horizontal or vertical displacement of the floating box body. In conjunction with the tension legs of the seabed foundation, the performance of wind and wave load resistance is improved.

Benefits of technology

It enhances the stability of the bridge structure, reduces swaying and rolling, reduces the number of tension legs required and the manufacturing difficulty, and improves the overall structure's resistance to wind and wave loads.

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    Figure CN116163197B_ABST
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Abstract

The application discloses a variable tension leg type special-shaped pontoon bridge foundation, and relates to the technical field of floating foundation structures. The foundation comprises a pontoon main body, a plurality of tension leg systems and a plurality of tension legs. The pontoon main body is used for being connected with the bottom of a bridge pier and providing buoyancy. A plurality of variable hydraulic rod systems are circumferentially and intervalled arranged on the outer side of the pontoon main body. Each variable hydraulic rod system can be adaptively stretched and contracted when the pontoon main body is horizontally or vertically displaced. One end of each tension leg is connected with one variable hydraulic rod system, and the other end is used for being connected with a seabed foundation. The pontoon main body is arranged at the bottom of the bridge pier, thereby providing a floating foundation for the bridge pier. When the pontoon main body is horizontally or vertically displaced, the plurality of variable hydraulic rod systems are adaptively stretched and contracted, thereby cooperating with the tension legs connected with the seabed foundation, so that the wind and wave load resistance performance of the overall structure is improved, and the pitching and rolling of the bridge are reduced.
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