Gunn et al 2018 Deterioration model Con and Building Mats 170 668 678.pdf (13.83 MB)
Download file

Deterioration model and condition monitoring of aged railway embankment using non-invasive geophysics

Download (13.83 MB)
journal contribution
posted on 08.05.2018, 13:49 authored by David Gunn, J. Chambers, B. Dashwood, A. Lacinska, Tom DijkstraTom Dijkstra, S. Uhlemann, R. Swift, M. Kirkham, Antoni E. Milodowski, J. Wragg, S. Donohue
Effective management of railway infrastructure is becoming increasingly reliant upon remote condition monitoring of geotechnical asset condition. Current monitoring approaches focus on confirmation of the morphological effects caused by subsurface processes driving deterioration. However, geophysical imaging offers new opportunities for ‘predict and prevent’ practices, providing access to monitoring internal property change patterns preceding these morphological responses. Geophysical methods utilize disturbances that propagate through and holistically sample earthworks and are especially suited to imaging the unique heterogeneity of aged embankments. In this case study, surface wave seismic surveys are interpreted to construct a stiffness ground model consistent with a heterogeneous embankment comprising local borrow materials. Time-lapse electrical resistivity imaging was also used to investigate and visualise ground water ingress and movement within this ground model. Ground water movement was shown to be highly dynamic, responding very quickly to local storm events with infiltration into the embankment within hours. Subsequent wetting and drying cycles throughout the embankment's lifespan have caused the dissolution, mobilisation and re-precipitation of soluble minerals within the fill materials. This process has driven the deterioration of the fill fabric, which is evidenced in thin sections by voids and localised rupture about in situ mineral growths. Finally, we provide a framework showing how geophysical methods could support more risk-based asset management practices of the future.

Funding

This paper has been made possible via funding from a number of sources including (inter alia): BGS (NERC) Scientific Programme, RCUK iSMART (EP/K027050/1) and the emda ALERT-ME (Project No. 0650).

History

School

  • Architecture, Building and Civil Engineering

Published in

Construction and Building Materials

Volume

170

Pages

668 - 678

Citation

GUNN, D. ... et al, 2018. Deterioration model and condition monitoring of aged railway embankment using non-invasive geophysics. Construction and Building Materials, 170, pp.668-678.

Publisher

© Elsevier

Version

AM (Accepted Manuscript)

Publisher statement

This work is made available according to the conditions of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) licence. Full details of this licence are available at: https://creativecommons.org/licenses/by-nc-nd/4.0/

Acceptance date

06/03/2018

Publication date

2018-03-23

Notes

This paper was published in the journal Construction and Building Materials and the definitive published version is available at https://doi.org/10.1016/j.conbuildmat.2018.03.066.

ISSN

0950-0618

Language

en