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Use of electrical imaging in site investigations for a railway tunnel through the Hallandsås Horst, Sweden

Dahlin, Torleif LU ; Bjelm, Leif LU and Svensson, Conny LU (1999) In Quarterly Journal of Engineering Geology & Hydrogeology 32(2). p.163-173
Abstract
Investigations over two major tectonic zones in the Hallandsås Horst, Southern Sweden were carried out in connection with a railway tunnelling project. A combination of resistivity imaging, core drilling and geophysical logging was found to provide a good overview of the variation in rock quality and detailed information on the engineering geological characteristics and genesis of the strata. Resistivity data, acquired along parallel lines over the zones using multi-electrode equipment, were processed by means of automatic inversion software to generate sections showing the variation of resistivity with depth. Wireline core drilling at selected points gave an almost complete core recovery, which revealed major sedimentary sequences and... (More)
Investigations over two major tectonic zones in the Hallandsås Horst, Southern Sweden were carried out in connection with a railway tunnelling project. A combination of resistivity imaging, core drilling and geophysical logging was found to provide a good overview of the variation in rock quality and detailed information on the engineering geological characteristics and genesis of the strata. Resistivity data, acquired along parallel lines over the zones using multi-electrode equipment, were processed by means of automatic inversion software to generate sections showing the variation of resistivity with depth. Wireline core drilling at selected points gave an almost complete core recovery, which revealed major sedimentary sequences and heavily weathered crystalline rocks that were previously unknown or only partially known despite conventional core drilling and percussion drilling. Geophysical borehole logging confirms the resistivity imaging results, and would be a particularly valuable complement to core logging in cases where significant core loss occurs. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
drilling, geophysics, site investigation: resistivity, tunnels
in
Quarterly Journal of Engineering Geology & Hydrogeology
volume
32
issue
2
pages
163 - 173
external identifiers
  • Scopus:0033494750
DOI
10.1144/​GSL.QJEG.1999.032.P2.06
language
English
LU publication?
yes
id
7cd88043-6c77-4ea8-b914-88535f128438 (old id 2344575)
date added to LUP
2012-02-27 14:18:05
date last changed
2016-04-16 11:13:54
@misc{7cd88043-6c77-4ea8-b914-88535f128438,
  abstract     = {Investigations over two major tectonic zones in the Hallandsås Horst, Southern Sweden were carried out in connection with a railway tunnelling project. A combination of resistivity imaging, core drilling and geophysical logging was found to provide a good overview of the variation in rock quality and detailed information on the engineering geological characteristics and genesis of the strata. Resistivity data, acquired along parallel lines over the zones using multi-electrode equipment, were processed by means of automatic inversion software to generate sections showing the variation of resistivity with depth. Wireline core drilling at selected points gave an almost complete core recovery, which revealed major sedimentary sequences and heavily weathered crystalline rocks that were previously unknown or only partially known despite conventional core drilling and percussion drilling. Geophysical borehole logging confirms the resistivity imaging results, and would be a particularly valuable complement to core logging in cases where significant core loss occurs.},
  author       = {Dahlin, Torleif and Bjelm, Leif and Svensson, Conny},
  keyword      = {drilling,geophysics,site investigation: resistivity,tunnels},
  language     = {eng},
  number       = {2},
  pages        = {163--173},
  series       = {Quarterly Journal of Engineering Geology & Hydrogeology},
  title        = {Use of electrical imaging in site investigations for a railway tunnel through the Hallandsås Horst, Sweden},
  url          = {http://dx.doi.org/10.1144/​GSL.QJEG.1999.032.P2.06},
  volume       = {32},
  year         = {1999},
}