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Experimental and DEM simulation of sandy soil reinforced with H–V inclusions in plane strain tests

机译:HV夹杂物加固的砂土平面应变试验与DEM模拟

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摘要

Horizontal–vertical (H–V) reinforcing elements are a new type of soil reinforcementnin geotechnical engineering. The advantages of this reinforcement have been validated by a series ofntriaxial compression tests in which all of the three principal stresses play a role in the stress–strain–nstrength response. However, many geotechnical designs involve soil mass subjected to plane strainnconditions. In this paper, laboratory plane strain compression tests were carried out with differentnheights of vertical inclusions along with horizontal reinforcement under four different confiningnstresses. In order to gain some insight into the driving micromechanics that govern the macroscalenbehaviour, the discrete-element method was used to model the behaviour of the reinforced soils andnthe modelling results were compared with the experimental results. The comparison showed that thenpredictions of the numerical analyses matched well with the experimental data in terms of macromechanicalnresponses. Finally, it can be concluded from the analyses that a specified improvement innstrength can be achieved using H–V inclusions compared with using only horizontal reinforcement.
机译:水平-垂直(HV)加固元件是岩土工程中的新型土壤加固。这种增强的优势已通过一系列三轴压缩试验得到了验证,其中三个主应力均在应力-应变-强度响应中起作用。但是,许多岩土工程设计都涉及承受平面应变条件的土壤质量。本文在四个不同的约束应力下,对不同高度的垂直夹杂物以及水平钢筋进行了实验室平面应变压缩试验。为了了解控制宏观尺度行为的驱动微力学原理,使用离散元方法对加筋土的行为进行建模,并将建模结果与实验结果进行比较。比较表明,在宏观力学响应方面,数值分析的预测与实验数据吻合良好。最后,从分析中可以得出结论,与仅使用水平钢筋相比,使用HV夹杂物可以实现特定的改善强度。

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  • 来源
    《Geosynthetics International》 |2013年第3期|162-173|共12页
  • 作者单位

    1Lecturer Department of Civil Engineering Shanghai University Shanghai 200072 P.R. ChinaTelephone: +86 21 56331447 Telefax: +86 21 56332265 E-mail: lin_yliang@163.com2Professor Department of Civil Engineering Shanghai University Shanghai 200072 ChinaTelephone: +86 21 56331971 Telefax: +86 21 56332265 E-mail: mxzhang@shu.edu.cn (Correspondingauthor)3Professor Department of Engineering College of Engineering Mathematics and Physical SciencesUniversity of Exeter Exeter Devon EX4 4QF UK Telephone: +44 1392 723640 Telefax: +44 1392217965 E-mail: A.A.Javadi@ex.ac.uk4Lecturer Department of Civil Engineering Shanghai University Shanghai 200072 ChinaTelephone: +86 21 56331447 Telefax: +86 21 56332265 E-mail: ye.lu@shu.edu.cn5PhD candidate Department of Civil Engineering Shanghai University Shanghai 200072 ChinaTelephone: +86 21 56331447 Telefax: +86 21 56332265 E-mail: zsl303@163.com;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Geosynthetics; Horizontal–vertical (H–V) reinforcing element; Reinforced soil; Plane strain test; Discrete-element method; Shear band;

    机译:土工合成材料;水平-垂直(HV)增强元件;加筋土;平面应变测试;离散元素法;剪切带;

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