TY - GEN
T1 - Numerical studies on the influence of column reinforcements with soil-binders on railway tracks
AU - Francisco, A.
AU - Paixão, A.
AU - Fortunato, Eduardo
AU - Varandas, J. N.
N1 - This work was carried out under the R&D project GroutRail, in collaboration with the company Mota-Engil Construções, S.A, and was co-funded by the European Regional Development Fund, through the POCI, in the scope of Portugal2020 and Lisb@2020 programs [POCI-01–0247-FEDER-017978]. Part of the work was conducted in the framework of the TC202 national committee of the Portuguese Geotechnical Society (SPG) “Transportation Geotechnics”, in association with the International Society for Soil Mechanics and Geotechnical Engineering (ISSMGE-TC202).
The first author’s postdoctoral fellowship [SFRH/ BPD/107737/2015] was financially supported by FCT. Fundação para a Ciência e a Tecnologia, through POCH, being co-funded by ESF and the national funds of MCTES, Portugal.
PY - 2018
Y1 - 2018
N2 - The reinforcement of railway track foundations, through injection of binders, without the need of removal of track components (i.e. rails, sleepers and ballast) has many advantages compared to traditional approaches, which normally are more complex, costly and strongly affect train operations. To contribute to a deeper understanding of issues associated with soil-binder column reinforcements, numerical studies were developed to analyse and compare different column layouts and to assess the effect of such reinforcements on the dynamic train-track interaction. To that aim, two three-dimensional numerical programs were used. Aspects of the train-track interaction and values of stresses and displacements on the track and trackbed layers are analysed and discussed. The results suggest that in similar problems of track platforms with uneven track stiffness, it is important to take into account the non-linear elastic behaviour of the ballast to obtain a more accurate three-dimensional load distribution.
AB - The reinforcement of railway track foundations, through injection of binders, without the need of removal of track components (i.e. rails, sleepers and ballast) has many advantages compared to traditional approaches, which normally are more complex, costly and strongly affect train operations. To contribute to a deeper understanding of issues associated with soil-binder column reinforcements, numerical studies were developed to analyse and compare different column layouts and to assess the effect of such reinforcements on the dynamic train-track interaction. To that aim, two three-dimensional numerical programs were used. Aspects of the train-track interaction and values of stresses and displacements on the track and trackbed layers are analysed and discussed. The results suggest that in similar problems of track platforms with uneven track stiffness, it is important to take into account the non-linear elastic behaviour of the ballast to obtain a more accurate three-dimensional load distribution.
UR - http://www.scopus.com/inward/record.url?scp=85061309738&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:85061309738
SN - 9781138544468
VL - 2
SP - 1431
EP - 1438
BT - Numerical methods in geotechnical engineering IX
A2 - Cardoso, António S.
A2 - Borges, José L.
A2 - Costa, Pedro A.
A2 - Gomes, António T.
A2 - Marques, José C.
A2 - Vieira, Castorina S.
PB - CRC Press/Balkema
T2 - 9th European Conference on Numerical Methods in Geotechnical Engineering, NUMGE 2018
Y2 - 25 June 2018 through 27 June 2018
ER -