RESEARCH ON BEARING PERFORMANCE OF NEW COMPOSITE SUCTION CAISSON FOUNDATION UNDER UNIAXIAL AND COMBINED LOADING

Liu Bo; Li Gang; Chen Yangming; Cui Shaoyun; Yan Yue; Xu Ruizhe

doi:10.19912/j.0254-0096.tynxb.2024-1359

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Acta Energiae Solaris Sinica ›› 2025, Vol. 46 ›› Issue (12) : 681-692. DOI: 10.19912/j.0254-0096.tynxb.2024-1359

RESEARCH ON BEARING PERFORMANCE OF NEW COMPOSITE SUCTION CAISSON FOUNDATION UNDER UNIAXIAL AND COMBINED LOADING

Liu Bo¹, Li Gang¹, Chen Yangming¹, Cui Shaoyun¹, Yan Yue², Xu Ruizhe²

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Abstract

This paper introduces a new composite suction caisson foundation. In this paper, the commercial software Abaqus was used to carry out finite element calculations on the foundation, and the effects of foundation embedment depth and soil strength on the bearing capacity under different loading conditions were investigated; Failure mechanisms of composite suction caisson foundations in homogeneous and normally consolidated clays under uniaxial, coplanar composite loading were simulated; The failure envelopes under coplanar composite loading were calculated; A set of close-formed mathematical expressions was presented; And based on the existing research results of the existing skirted circular foundation, the enhancement effect of the small suction caisson on the outer side of the new foundation on the bearing performance is comparatively analyzed. The results of the study show that： the small outer suction caissons have a significant effect on both uniaxial and composite loading performance of this foundation. Due to the evolution of the failure mechanism, the new type of foundation has a better improvement in torsional bearing capacity than other ultimate bearing capacities. The three small suction caissons of composite suction caisson foundation significantly expand failure envelopes in V-H, V-M, H-M, V-T, T-H and T-M loading spaces. The H-M failure envelope gradually shifts towards the first quadrant with increasing embedment depth.

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bearing capacity / foundations / clay / failure envelope / numerical analysis / suction anchor

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Liu Bo, Li Gang, Chen Yangming, Cui Shaoyun, Yan Yue, Xu Ruizhe. RESEARCH ON BEARING PERFORMANCE OF NEW COMPOSITE SUCTION CAISSON FOUNDATION UNDER UNIAXIAL AND COMBINED LOADING[J]. Acta Energiae Solaris Sinica. 2025, 46(12): 681-692 https://doi.org/10.19912/j.0254-0096.tynxb.2024-1359

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