Exploring the influence of size-related factors on geocell-reinforced soil response using coupled continuum-discontinuum analysis

IF 4.7 1区 工程技术 Q1 ENGINEERING, GEOLOGICAL Geotextiles and Geomembranes Pub Date : 2024-01-04 DOI:10.1016/j.geotexmem.2023.12.008
Haibo Wang , Ge Gao , Mohamed A. Meguid , Yi Pik Cheng , Lulu Zhang
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Abstract

Size-related factors, such as the dimensions and cell count of geocell, play a crucial role in determining the effectiveness of soil reinforcement. In this study, a 3D coupled framework that leverages the strengths of both continuum and discontinuum methods was developed to investigate the influence of pocket size and multi-cell configuration on geocell-reinforced soils. To unveil the impact of size-related factors on soil-geocell interactions, reinforced soils containing various geocell configurations (single large-sized cell, multiple small-sized cells), as well as geocell-free soils subjected to increasing levels of confining pressure were extensively examined. This thorough investigation aimed to establish correlations between macroscopic responses and underlying micromechanical mechanisms. Our findings revealed that the presence of the geocell not only enhances the densification of interparticle contacts and reduces the number of floating particles that contribute minimally to load support, but also facilitates the concentration of force chains within the geocell structure. This leads to an increase in elastic stiffness along the loading axis. These observations highlight that the geocell's confining mechanism enhances both the load-carrying capacity and the infill rigidity, thereby preventing lateral soil spreading. In essence, the geocell serves to increase the soil's ability to withstand load and maintain its structural integrity laterally.

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利用连续-非连续耦合分析探索与尺寸相关的因素对土工格室加固土壤响应的影响
与尺寸相关的因素,如土工格室的尺寸和单元数,在决定土壤加固效果方面起着至关重要的作用。本研究开发了一个三维耦合框架,充分利用连续和非连续方法的优势,研究土工格室尺寸和多单元配置对土工格室加固土壤的影响。为了揭示尺寸相关因素对土壤-土工格室相互作用的影响,我们广泛研究了包含各种土工格室配置(单个大尺寸格室、多个小尺寸格室)的加固土壤,以及承受不断增加的约束压力的无土工格室土壤。这项深入研究旨在建立宏观响应与潜在微观力学机制之间的相关性。我们的研究结果表明,土工格室的存在不仅增强了颗粒间接触的致密性,减少了对荷载支撑作用微乎其微的浮动颗粒的数量,还促进了土工格室结构内力链的集中。这导致沿加载轴的弹性刚度增加。这些观察结果表明,土工格室的约束机制增强了承载能力和填充刚度,从而防止了土壤的横向扩散。从本质上讲,土工格室的作用是提高土壤的承载能力,并保持其横向结构的完整性。
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来源期刊
Geotextiles and Geomembranes
Geotextiles and Geomembranes 地学-地球科学综合
CiteScore
9.50
自引率
21.20%
发文量
111
审稿时长
59 days
期刊介绍: The range of products and their applications has expanded rapidly over the last decade with geotextiles and geomembranes being specified world wide. This rapid growth is paralleled by a virtual explosion of technology. Current reference books and even manufacturers' sponsored publications tend to date very quickly and the need for a vehicle to bring together and discuss the growing body of technology now available has become evident. Geotextiles and Geomembranes fills this need and provides a forum for the dissemination of information amongst research workers, designers, users and manufacturers. By providing a growing fund of information the journal increases general awareness, prompts further research and assists in the establishment of international codes and regulations.
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