Tunnel type anchorage anti-pulling bearing capacity calculation method and system
By deriving the mechanical equilibrium equation based on the Mohr-Coulomb strength criterion, the problems of wedge effect and failure mode identification in the calculation of the pull-out bearing capacity of tunnel anchorages are solved, realizing more accurate and safer bearing capacity calculation, which is applicable to the design of suspension bridge engineering.
Patent Information
- Application Number
- CN202610531737.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-04-21
- Publication Date
- 2026-07-17
AI Technical Summary
Existing technologies fail to adequately consider the contribution of the normal stress increment generated by the wedge effect of the anchor plug to the shear strength in the calculation of the pull-out bearing capacity of tunnel anchorages in suspension bridges, and fail to accurately distinguish between the two failure modes of the surrounding rock body failure and the contact surface slip failure.
Based on the Mohr-Coulomb strength criterion, the mechanical equilibrium equations of the contact surface between the anchor plug and the surrounding rock under the ultimate failure state are established. The analytical formula for pull-out bearing capacity considering the wedge effect and the influence of initial in-situ stress is derived. By comparing the two modes of surrounding rock failure and interface failure, the safety and accuracy of the calculation results are ensured.
It improves the accuracy and safety of the calculation of the pull-out bearing capacity of tunnel anchorages, conforms to the principle of engineering safety and conservatism, can more comprehensively reflect the potential failure modes of anchorages, and has a simple calculation formula and convenient parameter acquisition, making it suitable for rapid verification and scheme comparison in engineering.
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Figure CN122413694A_ABST