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  Authors

Mahesh P Shettar,ZELALEM MEBRATE EJETA,HAILE ALEMAYEHU ABDISA,ASHENAFI OLANA KITESSA,GETTNET TADESSA ABEGAZ

  Keywords

Subgrade, rail-track substructure, numerical modelling.

  Abstract


With the huge demand for high speed railways across the world, major emphasis is laid on safety and a reduction in the journey time. There is much talk about high speed trains plying at over 200 km/h in certain sectors of India. The first of such sectors being talked about is the Mumbai-Ahmedabad corridor, which would drastically slash the journey time by around 5 hours. This leads to huge quasi-static and dynamic loads on the track, which further accelerates the process of the formation of fines, ballast degradation (through abrasion, attrition and grain fracturing) and a potential accumulation of excess pore water pressure and high vertical deformations in the subgrade. Furthermore, this pumping action generated leads to an infiltration of fines into the subgrade. Under poor conditions of drainage and workmanship, severe cases of fouling occur where the sleepers are surrounded by mud that retains a pool of water around them. To prevent such formation of mud holes in the soil, the implementation of proper drainage is essential to prevent stagnation of water at the ends of the sleeper. This also contributes to the stability of the track substructure by ensuring separation of the fine subgrade soil underneath with the coarse ballast above. Certain advances have been made in the field of mud hole management. In their manual, A.R.T.C. Ltd. (2001, 2013) pointed out the stagnation of water due to the lack of drainage being the major contributor to mud hole formation. Various methodologies for the modelling of the ballast and subgrade layer have been suggested. Kruse and Popp (2003) suggested the use of the Molecular Dynamics method to model the granular material, where every single stone of the ballast is taken into account along with calculation of the contact forces from the overlap areas of particle geometries. Modelling of resilient rubber pads with future applications to a reduction in the ballast settlements have been performed by Knothe et al. (2003)

  IJCRT's Publication Details

  Unique Identification Number - IJCRT2106080

  Paper ID - 208232

  Author type - Indian Author

  Page Number(s) - a564-a567

  Pubished in - Volume 9 | Issue 6 | June 2021

  DOI (Digital Object Identifier) -   

  No Of Downloads - 1209

  Author Country - India, 587103, Bagalkot, Bagalkot, 587103, Science and Technology

  Publisher Name - IJPUBLICATION | www.ijcrt.org | ISSN : 2320-2882

  E-ISSN Number - 2320-2882

  Published Paper PDF : - http://www.ijcrt.org/papers/IJCRT2106080

  Published Paper URL: : - http://ijcrt.org/viewfull.php?&p_id=IJCRT2106080

  Published Paper PDF Downlaod: - download.php?file=IJCRT2106080

  Cite this article

Mahesh P Shettar,ZELALEM MEBRATE EJETA,HAILE ALEMAYEHU ABDISA,ASHENAFI OLANA KITESSA,GETTNET TADESSA ABEGAZ,   "A STUDY ON THE DEFORMATION CHARACTERISTICS OF SUBGRADE IN THE SIMULATION OF RAIL-TRACK SUBSTRUCTURE SYSTEM CONSIDERING HIGH TRAIN SPEEDS", International Journal of Creative Research Thoughts (IJCRT), ISSN:2320-2882, Volume.9, Issue 6, pp.a564-a567, June 2021, Available at :http://www.ijcrt.org/papers/IJCRT2106080.pdf

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