具有可持续回填的机械稳定土墙的性能评估:实验和数值方法

IF 1.5 4区 工程技术 Q3 ENGINEERING, CIVIL
Pushpraj Mandloi, Sanjana Sarkar, A. Hegde
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引用次数: 6

摘要

随着天然地质材料的日益枯竭,科学家和工程师们不得不寻找大规模实际应用的可替代的可持续回填材料。本文对两种可持续回填材料(钢渣和建筑垃圾)的性能进行了试验和数值研究,以期为机械稳定土(MSE)墙体回填提供可能。详细的表征,随后使用广泛的实验室实验材料的性能评估,包括强度和排水标准提出。三轴试验和加州承载比(CBR)强度试验结果表明,可持续回填材料的性能优于传统回填材料。矿渣和废渣具有良好的排渣能力,表明其作为备选回填体的可能性较大。此外,还对采用土工格栅加固的可持续回填体的强度增强方案进行了评价。最后,通过有限元数值分析,探讨了将这些材料应用于MSE原型墙的可行性。硬化土模型被用来有效地捕捉这些材料的非线性应力-应变行为。有限元分析结果表明,可持续回填材料具有多种优势。与标准充填体相比,含矿渣和CDW充填体的MSE墙体水平位移分别减少56%和70%。此外,可持续回填墙的配筋应变较低。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Performance assessment of mechanically stabilised earth walls with sustainable backfills: experimental and numerical approach
The growing depletion of natural geomaterials has forced scientists and engineers to look for alternate sustainable backfill materials in large-scale practical applications. The study presents the experimental and numerical investigation on the performance of two sustainable backfills, namely steel slag and construction and demolition waste (CDW) for possible Mechanically Stabilized Earth (MSE) wall backfill application. A detailed characterization followed by the performance evaluation of the materials using extensive laboratory experiments, encompassing the strength and drainage criteria is presented. Results of the triaxial and California Bearing Ratio (CBR) strength tests highlighted the superior performance of the sustainable backfill materials as compared to the traditional backfill material. The adequate drainage capacity of slag and CDW reflected encouraging possibility of utilising the materials as alternate backfills. In addition, the strength enhancement options of sustainable backfills using geogrid reinforcement have been evaluated. Finally, the feasibility of utilising the materials in a prototype MSE wall was investigated with the help of finite element numerical analysis. Hardening Soil model was used to effectively capture the non-linear stress-strain behaviour of these materials. Results obtained from finite element analysis demonstrated multiple benefits of sustainable backfill materials. In comparison to the standard backfill, MSE walls with slag and CDW backfill demonstrated 56% and 70% reductions in horizontal wall displacements, respectively. Moreover, lower reinforcement strains were observed in walls with sustainable backfills.
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来源期刊
CiteScore
3.70
自引率
16.70%
发文量
44
审稿时长
>12 weeks
期刊介绍: Engineering Sustainability provides a forum for sharing the latest thinking from research and practice, and increasingly is presenting the ''how to'' of engineering a resilient future. The journal features refereed papers and shorter articles relating to the pursuit and implementation of sustainability principles through engineering planning, design and application. The tensions between and integration of social, economic and environmental considerations within such schemes are of particular relevance. Methodologies for assessing sustainability, policy issues, education and corporate responsibility will also be included. The aims will be met primarily by providing papers and briefing notes (including case histories and best practice guidance) of use to decision-makers, practitioners, researchers and students.
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