Design method of uplift bearing capacity of excavated foundation of power transmission line

By equating the slip surface of the excavated foundation with a straight slip surface model, the calculation of the uplift bearing capacity of the excavated foundation is simplified, the complex calculation problem in the existing technology is solved, and a simple and efficient bearing capacity design is realized.

CN116992690BActive Publication Date: 2026-07-24POWERCHINA FUJIAN ELECTRIC POWER SURVEY & DESIGN INST CO LTD +1
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Patent Information

Application Number
CN202311096427.1
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2023-08-29
Publication Date
2026-07-24
Estimated Expiration
2043-08-29

AI Technical Summary

Technical Problem

In the current power industry, the calculation process for the ultimate uplift bearing capacity of the excavated foundation of overhead transmission lines is complex and difficult to apply effectively in actual engineering.

Method used

The slip surface of the excavated foundation is equivalent to a straight line AB. A straight slip surface model is constructed, and the ultimate pull-out bearing capacity of the excavated foundation is obtained by calculation. The bearing capacity is designed using the equivalent internal friction angle and the soil self-weight, and a bearing capacity table is compiled for engineers to use.

Benefits of technology

It simplifies the calculation of the pull-out bearing capacity of excavated foundations, requiring only 3 unknown parameters, providing a convenient design method and improving the efficiency and accuracy of engineering applications.

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Abstract

The present application relates to a kind of transmission line excavated foundation uplift bearing capacity design method, by the equivalent straight line AB of excavated foundation uplift soil mass slip surface, construct straight line slip surface model, deduce a kind of excavated foundation uplift bearing capacity calculation formula from straight line slip surface model, the formula only contains 3 unknown parameters, respectively, according to the equivalent internal friction angle of equivalent internal friction angle excavated foundation bottom diameter D and straight line slip surface model height h that the cohesion and internal friction angle in geology are equivalent according to shear stress equivalence principle, calculation is simple and convenient for engineers to use, by the classification of equivalent internal friction angle, compile into bearing capacity table, for engineering personnel to use, provide great convenience for engineers.
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