Soil Improvement of Alluvial Deposits Under High-Speed Railway Embankment: Field Case Study

Mridakh, Ahmed Hamza; Lahlou, Fouad; Ejjaaouani, Houssine; Mridekh, Abdelaziz; Labied, Hassan

doi:10.1007/s10706-019-00855-8

Cited by 4 publications

(3 citation statements)

References 32 publications

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“…Pelaksanaan metode preloding adalah dengan memberikan beban berupa timbunan yang nilainya sebesar beban konstruksi yang akan bekerja. Beberapa penelitian telah dilakukan dan menunjukkan bahwa metode preloading efektif dalam mempercepat waktu konsolidasi, baik dilakukan sendiri (Filippo dkk., 2016;Mridakh, 2019) atau dikombinasikan dengan Prefabricated Vertical Drains kk (Zhang, dkk., 2018;Indraratna dkk., 2016;Cascone dan Biondi, 2013;Wang dkk., 2018).…”

Section: Pendahuluanunclassified

Analisis Percepatan Konsolidasi Tanah Lunak dengan Metode Preloading Menggunakan Software GeoStudio 2018 R2

Setiawan,

Chrismaningwang,

Denaldi

2024

MATEKSI JTS UNS

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Highways are one of the transportation infrastructures frequently used in Indonesia. Due to the road's construction on unstable soil, it is currently in a vulnerable state of failure. Since areas with good soil characteristics are limited, sometimes structures need to be built on problematic soils. Therefore, it is necessary to improve the quality of the problematic soil to reduce the potential threat of road damage caused by the problematic subgrade. One of the attempts is using preloading for soil improvement. This research focuses on how to overcome soft soil consolidation with the preloading method using GeoStudio software. The analysis's outcomes, which were examined by software, will be compared to calculations before improvement. SIGMA/W and SLOPE/W analyses provided by GeoStudio were performed by using two different types of embankments, i.e.,

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Section: Pendahuluanunclassified

Analisis Percepatan Konsolidasi Tanah Lunak dengan Metode Preloading Menggunakan Software GeoStudio 2018 R2

Setiawan,

Chrismaningwang,

Denaldi

2024

MATEKSI JTS UNS

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“…In the last decade and due to the development of numerical modeling methods to solve challenging geotechnical problems, researcher have advanced their research methods to predict soft soil behaviour while using prefabricated vertical drains [2], when some presented a complete detailed studies based on numerous matching method when using PVD's [3] [4]. Similarly, in the studied area multiple publications have been published in regards of soil behaviour prediction under the Moroccan high speed railway Embankment [5] [6] [7], of which soft soil behaviour was studied during Classe A and Classe C prediction for precise numerical simulation objective in Sebou area [5] [7]. In addition to studying artesian pressure effect of soft soil behaviour in Drader area under the HSRL.…”

Section: Numerical Modelingmentioning

confidence: 99%

Vertical drainage of compressible soils under the Moroccan high-speed railway line

Mridakh¹,

Ejjaaouani²

2023

E3S Web Conf.

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This research work presents the high-speed railway line (HSRL) case study constructed on soft soils deposits. The performance of the improvement method combining both PVD’s (Prefabricated vertical drains) and surcharge preloading was evaluated herein based on numerical simulation approach to predict the induced deformations during the HSRL construction phase. For this aim, the performance of the PVD-assisted preloading was evaluated based on in situ measurement database from a selected well instrumented embankment. From the results, it was observed that the use of the PVD and preloading was found as the most efficient improvement method for improved section. In addition, multiple modelling approaches were used for the studied section to evaluate the usefulness of the published literature on the PVD- surcharge system performance. For that, is was concluded that the well-developed numerical approaches in the literature is an encouraging factor for using the PVD-preloading improvement method in both practice and research.

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“…e unique feature of DEM is that it can capture the behavior of individual particles and their interaction from a particulate scale [19], and unlike traditional numerical methods such as the finite element method (FEM) [20][21][22], it can analyze large discontinuous deformation. Boosted by advanced commercial software such as PFC3D, which was developed by Itasca, DEM has been successfully applied in various research disciplines [23][24][25].…”

Section: Discrete Element Modelingmentioning

confidence: 99%

A Numerical Study of Railway Ballast Subjected to Direct Shearing Using the Discrete Element Method

Zhao

Chen

2020

Advances in Materials Science and Engineering

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Railway ballast is a coarse granular material used to carry train loads and provide drainage for the rail tracks. This study presents numerical explorations of the mechanical performance of ballast aggregates subjected to direct shear tests. The discrete element method (DEM) was used to investigate the microscopic characteristics of ballast aggregates during shearing while considering contact distribution, particle rotation, and particle displacement. By testing the angle of repose of ballast aggregates, the parameters for the DEM contact model could be calibrated. Four specimens were prepared and then subjected to different normal pressures. The results show that the contact between ballast particles intensifies in terms of the amount and magnitude as the normal pressure increases. A Fourier analysis was applied to investigate the anisotropy of contact normal and the contact forces for ballast aggregates at different shearing phases. The rotational and translational movements of ballast particles were investigated, and this investigation revealed that particle rotation gradually increased as the shearing propagated. Four regions in the aggregates were identified according to the translational pattern of ballast particles. The results of this research provide an in-depth analysis of microscopic characteristics from a particulate scale.

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Soil Improvement of Alluvial Deposits Under High-Speed Railway Embankment: Field Case Study

Cited by 4 publications

References 32 publications

Analisis Percepatan Konsolidasi Tanah Lunak dengan Metode Preloading Menggunakan Software GeoStudio 2018 R2

Analisis Percepatan Konsolidasi Tanah Lunak dengan Metode Preloading Menggunakan Software GeoStudio 2018 R2

Vertical drainage of compressible soils under the Moroccan high-speed railway line

A Numerical Study of Railway Ballast Subjected to Direct Shearing Using the Discrete Element Method

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