Numerical Analysis of a 3D Unit Cell Model for Soft Soil Reinforced with Different Granular Columns

IF 1 Q4 ENGINEERING, CIVIL

Jordan Journal of Civil Engineering Pub Date : 2023-10-01 DOI:10.14525/jjce.v17i4.05

Yousfi Amin

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引用次数: 0

Abstract

Recycled aggregates have been increasingly considered in recent years, owing to the limited supply of natural aggregates coupled with the corresponding carbon footprint. Recycled aggregates are aggregates prepared from construction and demolition waste. Their use aims to reduce energy consumption and contributes to reducing waste harmful to the environment. This study is based on a number of numerical tests using the finite element method of PLAXIS 3D software with the elastic-perfectly plastic behavior model and the Mohr flow criterion for all materials. A unit cell model of soft soil treated with three types of granular columns was loaded to failure: ordinary stone columns (OSCs), sand-fiber mix (SFM) and recycled aggregate porous concrete pile (RAPP). An extensive parametric study was conducted to investigate the effect of column type, friction angle, elasticity modulus, column length and geotextile effective stiffness on the behavior of soft soils. The results of numerical tests indicated that the bearing capacity of the recycled aggregate columns is three times greater than that of columns of natural aggregates. The findings of this research are given in the form of load-settlement graphs, which made it possible to release recommendations to carry out works using this technique. KEYWORDS: Soft soil, Granular column, Numerical analysis, Unit cell, Bearing capacity, PLAXIS 3D software

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不同颗粒柱加筋软土三维单元胞模型的数值分析

近年来，由于天然骨料供应有限，加上相应的碳足迹，回收骨料越来越受到重视。再生骨料是从建筑和拆除废物中制备的骨料。它们的使用旨在减少能源消耗，并有助于减少对环境有害的废物。本研究基于PLAXIS 3D软件的有限元方法，采用弹塑性行为模型和Mohr流动准则对所有材料进行了数值试验。采用普通石柱(OSCs)、砂纤维拌合桩(SFM)和再生骨料多孔混凝土桩(RAPP)三种颗粒柱对软土地基进行荷载破坏的单胞模型。本文对柱型、摩擦角、弹性模量、柱长和土工布有效刚度对软土性能的影响进行了广泛的参数化研究。数值试验结果表明，再生骨料柱的承载力是天然骨料柱承载力的3倍。本研究的结果以荷载沉降图的形式给出，这使得可以发布使用这种技术进行工作的建议。关键词:软土，颗粒柱，数值分析，单元格，承载力，PLAXIS 3D软件

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来源期刊

Jordan Journal of Civil Engineering ENGINEERING, CIVIL-

CiteScore

2.10

自引率

27.30%

发文量

期刊介绍： I am very pleased and honored to be appointed as an Editor-in-Chief of the Jordan Journal of Civil Engineering which enjoys an excellent reputation, both locally and internationally. Since development is the essence of life, I hope to continue developing this distinguished Journal, building on the effort of all the Editors-in-Chief and Editorial Board Members as well as Advisory Boards of the Journal since its establishment about a decade ago. I will do my best to focus on publishing high quality diverse articles and move forward in the indexing issue of the Journal.