A method for real-time determination of the elevation of a steel girder cable-stayed bridge during cantilever construction

By decomposing the pre-lifting value during construction and establishing the component quality relationship, the cantilever construction elevation of the steel beam cable-stayed bridge can be calculated in real time, solving the problem of difficulty in accurately determining the elevation during construction and improving construction accuracy.

CN117702641BActive Publication Date: 2026-05-29JSTI GRP INSPECTION & CERTIFICATION CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
JSTI GRP INSPECTION & CERTIFICATION CO LTD
Filing Date
2024-01-02
Publication Date
2026-05-29

AI Technical Summary

Technical Problem

In the cantilever construction of steel girder cable-stayed bridges, existing technologies make it difficult to accurately determine the construction elevation in real time, resulting in large errors after the structure is installed and making it difficult to match the design alignment.

Method used

By decomposing the pre-lift value into multiple parts and establishing the relationship between the mass of each component, the construction elevation is calculated in real time using simple multiplication and addition operations. This includes decomposing the pre-lift value and deformation on the left and right sides, and calculating the actual elevation in combination with the design elevation.

Benefits of technology

It enables real-time and accurate calculation of elevation during on-site installation, improves the precision of structural elevation control, and reduces construction errors.

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Abstract

The present application relates to the technical field of bridge construction, particularly relates to a kind of steel beam cable-stayed bridge cantilever construction elevation real-time determination method, a kind of steel beam cable-stayed bridge cantilever construction elevation real-time determination method, comprising the following steps, design elevation of steel beam cable-stayed bridge cantilever segment is H0, determine design elevation H0, construction pre-lift value of steel beam cable-stayed bridge cantilever segment is ΔH, determine steel beam cable-stayed bridge cantilever segment construction pre-lift value ΔH, control elevation of steel beam cable-stayed bridge cantilever segment is H, calculate H, the present application can be directly calculated according to the actual installation sequence of field Structure actual elevation by simple multiplication and addition operation, relative deformation can also be further calculated, increase structure elevation control precision.
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