Ahmad Hussein
Department of Geotechnical Engineering, Faculty of Civil Engineering, Tishreen University, Latakia, Syria.
Heliyon. 2025 Jan 7;11(2):e41710. doi: 10.1016/j.heliyon.2025.e41710. eCollection 2025 Jan 30.
This study investigates the performance of a skirt sand pile (SSP) system beneath a circular shallow footing using three-dimensional finite element analysis calibrated against a large-scale experimental setup. The SSP, measuring 8.00 m in length and 1.00 m in diameter, was analyzed in a soft clay-sandy soil environment. The Mohr-Coulomb, hardening soil, and linear elastic models were employed to simulate the soil and structural elements. The innovative aspect of this study lies in the comprehensive evaluation of the SSP system's load-bearing capacity and settlement behavior, revealing its superior performance compared to deep cement pile (DCP). Numerical results demonstrated LBR improvements of 1.7 and 1.4 at settlement ratios (s/B%) of 10 % and 15 %, respectively, for the SSP, compared to LBRs of 1.3 and 1.1 for DCM. Additionally, the study explores the significant Influence of increasing SSP length (by 180 %), which resulted in a much greater increase in load-bearing capacity compared to similar changes in DCM. Another key innovation is the analysis of soil cohesion and friction angle effects, where increasing these parameters resulted in a reduction in settlement ratios from 36 % to 12 %, with the load-bearing capacity improving from 2 to 3.7. A significant and innovative aspect of this study is the soil-skirt sandpile interaction, which was found to have a much greater effect on the load-bearing capacity and settlement behavior than the traditional soil-deep cement pile interaction. This study provides critical insights into the efficacy of SSP systems in enhancing foundation performance, offering a cost-effective, efficient alternative to traditional deep cement pile, especially in layered clay-sand soil environments. The findings provide practical guidance for optimizing foundation design and improving the sustainability of geotechnical engineering solutions.
本研究采用三维有限元分析方法，并根据大型试验装置进行校准，以研究圆形浅基础下方裙式砂桩（SSP）系统的性能。在软黏土 - 砂土环境中对长度为8.00米、直径为1.00米的裙式砂桩进行了分析。采用摩尔 - 库仑模型、硬化土模型和线弹性模型来模拟土体和结构单元。本研究的创新之处在于对裙式砂桩系统的承载能力和沉降特性进行了全面评估，揭示了其相对于深层水泥桩（DCP）的优越性能。数值结果表明，与深层水泥搅拌桩（DCM）的极限承载力比（LBR）分别为1.3和1.1相比，裙式砂桩在沉降比（s/B%）为10%和15%时，极限承载力比分别提高了1.7和1.4。此外，该研究还探讨了裙式砂桩长度增加180%的显著影响，与深层水泥搅拌桩的类似变化相比，其承载能力有了更大的提高。另一个关键创新点是对土的黏聚力和摩擦角效应的分析，增加这些参数会使沉降比从36%降至12%，同时承载能力从2提高到3.7。本研究的一个重要创新点是土 - 裙式砂桩相互作用，发现其对承载能力和沉降特性的影响比传统的土 - 深层水泥桩相互作用大得多。本研究为裙式砂桩系统在提高基础性能方面的有效性提供了关键见解，为传统深层水泥桩提供了一种经济高效的替代方案，特别是在层状黏土 - 砂土环境中。研究结果为优化基础设计和提高岩土工程解决方案的可持续性提供了实际指导。
