Semi-empirical Model for Predicting the Bearing Capacity of Reinjectable and Prestressed Anchors

One of the most unknown facts related to anchor design is determining of the required anchored length to resist the applied prestressing on the anchor. For this design, it is necessary to estimate the bond stress generated at the bulb-ground contact. In this research, an equation is proposed to esti...

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Bibliographic Details
Published in:Geotechnical and geological engineering 2024-11, Vol.42 (8), p.7699-7712
Main Authors: Fernandes, Marcos Túlio, Pitanga, Heraldo Nunes, Ferraz, Roberto Lopes, Porto, Thiago Bomjardim
Format: Article
Language:English
Subjects:
Bearing capacity
Bond stress
Bonding
Civil Engineering
Contact pressure
Contact stresses
Design
Design analysis
Earth and Environmental Science
Earth Sciences
Empirical equations
Geotechnical Engineering & Applied Earth Sciences
Hydrogeology
Impact analysis
Injection
Original Paper
Penetration resistance
Performance evaluation
Prestressing
Proof testing
Semiempirical equations
Sensitivity analysis
Soil analysis
Soil resistance
Soil stresses
Soil types
Soils
Terrestrial Pollution
Variables
Vertical penetration
Waste Management/Waste Technology
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Summary:One of the most unknown facts related to anchor design is determining of the required anchored length to resist the applied prestressing on the anchor. For this design, it is necessary to estimate the bond stress generated at the bulb-ground contact. In this research, an equation is proposed to estimate the bond stress which was achieved by analyzing 136 anchor performance and proof tests. Additionally, a sensitivity analysis was also conducted to detect the influence of each variable on the bond stress, besides a performance evaluation of the semi-empirical equations for the bearing capacity evaluation. Based on these analyses, it was possible to identify effective vertical stress as the variable causing the most impact on bond stress. The influence of injection pressure, injection number, and penetration resistance index altered with the soil types analyzed. Information about the expected prediction interval of bond stress is provided for each soil type.
ISSN:0960-3182
1573-1529
DOI:10.1007/s10706-024-02946-7