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Re-injection of groundwater by pressurizing a segmental tunnel lining with permeable backfill

Rosberg, Jan-Erik LU and Aurell, Oskar (2010) In Tunnelling and Underground Space Technology 25(2). p.129-138
Abstract
Recently, within a tunneling project, a method for reinjecting discharged groundwater at tunnel level has been investigated. The method was performed by pressurizing a long section of the lining With ungrouted pea gravel as backfill, in a rock mass with low hydraulic conductivity. Water was reinjected through watertight lining into a section where un-grouted pea gravel was used as backfill. The pressure response was measured both behind the lining and in the rock mass, the latter by means of several observation wells drilled from ground level. Reinjecting water into a rock mass by pressurizing a lining with a permeable backfill (Such as un-grouted pea gravel) was found to be possible and feasible. Well testing methods developed for... (More)
Recently, within a tunneling project, a method for reinjecting discharged groundwater at tunnel level has been investigated. The method was performed by pressurizing a long section of the lining With ungrouted pea gravel as backfill, in a rock mass with low hydraulic conductivity. Water was reinjected through watertight lining into a section where un-grouted pea gravel was used as backfill. The pressure response was measured both behind the lining and in the rock mass, the latter by means of several observation wells drilled from ground level. Reinjecting water into a rock mass by pressurizing a lining with a permeable backfill (Such as un-grouted pea gravel) was found to be possible and feasible. Well testing methods developed for vertically drilled wells, such as a step injection test and constant head/pressure tests, Were used and found to be applicable, even for testing at tunnel level. It was also found that well known analytical Solutions, developed for vertically drilled wells, can be used for interpretation, e.g. transmissivity from tests performed at tunnel level and from the pressure response in two of the observation wells. (c) 2009 Elsevier Ltd. All rights reserved. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Hallandsas project, Segmental lining, Permeable backfill, Re-injection, Well testing
in
Tunnelling and Underground Space Technology
volume
25
issue
2
pages
129 - 138
publisher
Elsevier
external identifiers
  • wos:000275232400005
  • scopus:74149093954
ISSN
1878-4364
DOI
10.1016/j.tust.2009.10.002
language
English
LU publication?
yes
id
2002c6a3-ad25-4bae-9769-e2ebe7b7ee21 (old id 1589285)
date added to LUP
2010-04-20 12:59:08
date last changed
2018-05-29 12:24:50
@article{2002c6a3-ad25-4bae-9769-e2ebe7b7ee21,
  abstract     = {Recently, within a tunneling project, a method for reinjecting discharged groundwater at tunnel level has been investigated. The method was performed by pressurizing a long section of the lining With ungrouted pea gravel as backfill, in a rock mass with low hydraulic conductivity. Water was reinjected through watertight lining into a section where un-grouted pea gravel was used as backfill. The pressure response was measured both behind the lining and in the rock mass, the latter by means of several observation wells drilled from ground level. Reinjecting water into a rock mass by pressurizing a lining with a permeable backfill (Such as un-grouted pea gravel) was found to be possible and feasible. Well testing methods developed for vertically drilled wells, such as a step injection test and constant head/pressure tests, Were used and found to be applicable, even for testing at tunnel level. It was also found that well known analytical Solutions, developed for vertically drilled wells, can be used for interpretation, e.g. transmissivity from tests performed at tunnel level and from the pressure response in two of the observation wells. (c) 2009 Elsevier Ltd. All rights reserved.},
  author       = {Rosberg, Jan-Erik and Aurell, Oskar},
  issn         = {1878-4364},
  keyword      = {Hallandsas project,Segmental lining,Permeable backfill,Re-injection,Well testing},
  language     = {eng},
  number       = {2},
  pages        = {129--138},
  publisher    = {Elsevier},
  series       = {Tunnelling and Underground Space Technology},
  title        = {Re-injection of groundwater by pressurizing a segmental tunnel lining with permeable backfill},
  url          = {http://dx.doi.org/10.1016/j.tust.2009.10.002},
  volume       = {25},
  year         = {2010},
}