Method and device for determining safety degree of arch dam

By constructing a model of design conditions and time-dependent deformation conditions, the overload safety factor is obtained, which solves the problem of insufficient accuracy in determining the safety of arch dams in existing technologies and realizes dynamic safety monitoring of arch dams throughout their entire life cycle.

CN122333836APending Publication Date: 2026-07-03HUANENG LANCANG RIVER HYDROPOWER CO LTD +2
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Patent Information

Application Number
CN202610248553.1
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-03-02
Publication Date
2026-07-03

AI Technical Summary

Technical Problem

Existing methods for determining the safety of arch dams cannot reflect the long-term impact of time-dependent deformation on the dam's operational behavior, resulting in low accuracy in safety determination and making it difficult to provide precise data for dynamic safety monitoring of arch dams throughout their entire life cycle.

Method used

Design condition model and time-dependent deformation condition model were constructed, and water pressure overload analysis was performed to obtain the first and second overload safety factors. Based on these factors, the safety of the arch dam was determined. The parameters were verified by inverting parameters through field monitoring data to simulate the time-dependent deformation factors of the dam body, such as concrete creep and bedrock creep.

Benefits of technology

By quantitatively revealing the impact of time-dependent deformation on the operational behavior of arch dams, the comprehensiveness and accuracy of safety determination are improved, providing precise basis for dynamic safety monitoring of arch dams throughout their entire life cycle.

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Abstract

This invention provides a method and apparatus for determining the safety factor of an arch dam. The method includes: constructing a finite element model based on the geometric structure of the target arch dam; assigning values ​​to the finite element model based on design condition parameters to obtain a design condition model; assigning values ​​to the finite element model based on time-dependent deformation condition parameters to obtain a time-dependent deformation condition model; performing hydraulic overload analysis on both the design condition model and the time-dependent deformation condition model to determine a first overload safety factor and a second overload safety factor; and determining the safety factor of the target arch dam based on the first and second overload safety factors. The analysis, based on a dual-model comparative analysis framework of ideal design state and long-term operating state, can quantitatively reveal the impact of deformation on the working behavior of the arch dam, effectively solving the problem that a single-dimensional safety factor assessment cannot reflect the safety margin decay caused by time-dependent deformation, thus significantly improving the comprehensiveness and accuracy of determining the safety factor of high arch dams.
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