A method for positioning cofferdams for bridge construction based on BeiDou positioning

By using the BeiDou RTK system, fluid-structure interaction modeling, and filtering optimization, combined with error compensation and monitoring mechanisms, the problem of unstable positioning accuracy of cofferdams in complex aquatic environments was solved, achieving high-precision and long-term stable positioning results.

CN120178281BActive Publication Date: 2026-05-26GUANGXI ZHUANG AUTONOMOUS REGION CONSTR ENG QUALITY INSPECTION CENT CO LTD
View PDF 2 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2025-03-18
Publication Date
2026-05-26

AI Technical Summary

Technical Problem

Existing technologies struggle to achieve high-precision, long-term stable positioning of cofferdams in complex waters and dynamic environments. In particular, RTK systems are susceptible to electromagnetic interference, Kalman filters have limited filtering effects in nonlinear environments, H∞ filters cannot be adjusted in real time, and there is a lack of real-time monitoring and error feedback mechanisms, resulting in unstable positioning accuracy.

Method used

By employing the BeiDou RTK system combined with differential correction, fluid-structure interaction modeling, unscented Kalman filtering state estimation, and H∞ optimization filtering, along with error compensation and monitoring mechanisms, the system optimizes positioning accuracy and adapts to environmental changes through real-time monitoring and error feedback.

Benefits of technology

It achieves high-precision, long-term stable positioning in complex aquatic environments, improves the robustness and anti-interference ability of the system, and ensures the dynamic optimization and long-term stability of the cofferdam positioning.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN120178281B_ABST
    Figure CN120178281B_ABST
Patent Text Reader

Abstract

This application relates to the field of high-precision positioning technology in water surface construction, and discloses a method for positioning a cofferdam for bridge construction based on BeiDou positioning, including the following steps: S1, BeiDou RTK initialization, setting up a reference station, obtaining the initial position of the cofferdam, and using differential correction to achieve centimeter-level positioning; S2, fluid-structure interaction modeling, establishing a dynamic model of the cofferdam under the action of water flow, tides, and wind based on computational fluid dynamics methods, and calculating the stress and deformation of the cofferdam using finite element analysis; S3, unscented Kalman filter state estimation, calculating the current position, velocity, and error range of the cofferdam based on historical position information of the cofferdam and prediction data from fluid-structure interaction modeling. This invention ensures the timeliness of error correction through an error loop feedback mechanism and real-time alarm function, improving the robustness and stability of the system, and significantly enhancing the positioning accuracy and reliability of the cofferdam during construction.
Need to check novelty before this filing date? Find Prior Art

Citation Information

Patent Citations

  • Underwater sensor node positioning method based on layered ocean current model

    CN110730415A

  • Cofferdam positioning method and system for bridge construction based on Beidou positioning

    CN117388894A