We performed a series of small-scale physical modeling tests on two types of multiple ball-shaped nodular underreamed anchors under vertical uplift loading conditions using transparent soil and particle image velocimetry. Three sets of numerical investigations were also carried out to study the effect of anchor structure parameters on uplift bearing capacity. The results show that a larger ball diameter efficiently enhances ultimate bearing capacity, and the distance between two neighboring balls is closely associated with the bearing capacity of the ball 'shoulder' and shear resistance along the enlargement sides. An optimal design parameter is recommended to achieve the anchor's maximum ultimate bearing capacity.
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Translated from Osnovaniya, Fundamenty i Mekhanika Gruntov, No. 1, p. 18, January-February, 2020.
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Chen, C., Xia, Y. & Ni, Q. Investigation on the Working Mechanism and Structural Parameters Optimization of Multiple Ball Shaped Nodular Anchors. Soil Mech Found Eng 57, 49–56 (2020). https://doi.org/10.1007/s11204-020-09636-5
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DOI: https://doi.org/10.1007/s11204-020-09636-5