Abdrabbo Fathi M, Gaaver Khaled E, Elwakil Amr Z, Khalifa Shahinaz A
Structural Engineering Department, Faculty of Engineering, Alexandria University, Alexandria, Egypt.
Faculty of Engineering, Alexandria University, Alexandria, Egypt.
Sci Rep. 2024 Nov 28;14(1):29628. doi: 10.1038/s41598-024-77587-0.
Planning embankments demands comprehensive studies to select suitable materials, enhance soil stability, ensure optimal performance, and comply with building code requirements and sustainability standards. This study offers an evaluation of various alternatives and their effectiveness for constructing embankments on weak soil using the 2D finite element software Plaxis 8. It highlights the convergence of different techniques, offering flexibility in selecting the optimal strategy for projects. The behaviour of multilayer clayey soil under an embankment of lightweight filling materials such as mixed sawdust or geo-foam and that carrying an embankment of traditional fill material improved by deep replacement techniques like concrete piles (CP), deep-mixing columns (DMC), stone columns (SC), and sand piles (SP) were compared considering factors like stress distribution, pore water pressure, and settlement of the soil. The results demonstrate that lightweight materials reduced settlement by 11-98% and stress by 5-89%, while deep replacement techniques reduced settlement by 8.5-75% and stress by 44-88%. Notably, the study underscores the effectiveness of DMC in promoting soil reuse compared to CP.
规划堤坝需要进行全面研究，以选择合适的材料、增强土壤稳定性、确保最佳性能，并符合建筑规范要求和可持续性标准。本研究使用二维有限元软件Plaxis 8对在软弱土壤上建造堤坝的各种替代方案及其有效性进行了评估。它突出了不同技术的融合，为项目选择最佳策略提供了灵活性。考虑到应力分布、孔隙水压力和土壤沉降等因素，比较了多层粘性土在混合锯末或泡沫聚苯乙烯等轻质填充材料堤坝下以及在通过混凝土桩（CP）、深层搅拌桩（DMC）、石柱（SC）和砂桩（SP）等深层置换技术改良的传统填充材料堤坝下的行为。结果表明，轻质材料使沉降减少了11% - 98%，应力减少了5% - 89%，而深层置换技术使沉降减少了8.5% - 75%，应力减少了44% - 88%。值得注意的是，该研究强调了与CP相比，DMC在促进土壤再利用方面的有效性。
