A review of the Namntall Tunnel project with regard to grouting performance
The 6 km tunnel under the Namntall hill is a part of the Botniabanan railway project in northern Sweden. The tunnels were excavated by means of drilling and blasting and with, for Scandinavian conditions, a normal grouting routine. The grouting is performed to reduce water ingress into the tunnel to...
Published in: | Tunnelling and Underground Space Technology |
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Online Access: | https://doi.org/10.1016/j.tust.2010.01.009 https://research.chalmers.se/en/publication/122954 |
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ftchalmersuniv:oai:research.chalmers.se:122954 2023-05-15T17:44:42+02:00 A review of the Namntall Tunnel project with regard to grouting performance Stille, Björn Gustafson, Gunnar 2010 text https://doi.org/10.1016/j.tust.2010.01.009 https://research.chalmers.se/en/publication/122954 unknown http://dx.doi.org/10.1016/j.tust.2010.01.009 https://research.chalmers.se/en/publication/122954 Civil Engineering Inflow Grouting Zones Fractured rock Case study 2010 ftchalmersuniv https://doi.org/10.1016/j.tust.2010.01.009 2022-12-11T07:09:52Z The 6 km tunnel under the Namntall hill is a part of the Botniabanan railway project in northern Sweden. The tunnels were excavated by means of drilling and blasting and with, for Scandinavian conditions, a normal grouting routine. The grouting is performed to reduce water ingress into the tunnel to the level defined in the contract. When the water ingress requirements proved difficult to meet, it was obvious that the geological and the hydrogeological conditions in the tunnel would dictate the work processes. A distinctive change in rock conditions influenced both grouting performance and seepage into the tunnel. The rock conditions and the grouting were quantified throughout the project and these are summarized in this paper. It can be concluded that the strongest correlation is between the water ingress, the hydrogeological conditions and the density of the zones and the conditions in and around these zones. The paper suggests a different approach to hydrogeological prognosis and the grouting process, such as distribution of grouting classes, increased mixer capacities and regular use of two grouting rounds. (C) 2010 Elsevier Ltd. All rights reserved. Other/Unknown Material Northern Sweden Chalmers University of Technology: Chalmers research Tunnelling and Underground Space Technology 25 4 346 356 |
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Open Polar |
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Chalmers University of Technology: Chalmers research |
op_collection_id |
ftchalmersuniv |
language |
unknown |
topic |
Civil Engineering Inflow Grouting Zones Fractured rock Case study |
spellingShingle |
Civil Engineering Inflow Grouting Zones Fractured rock Case study Stille, Björn Gustafson, Gunnar A review of the Namntall Tunnel project with regard to grouting performance |
topic_facet |
Civil Engineering Inflow Grouting Zones Fractured rock Case study |
description |
The 6 km tunnel under the Namntall hill is a part of the Botniabanan railway project in northern Sweden. The tunnels were excavated by means of drilling and blasting and with, for Scandinavian conditions, a normal grouting routine. The grouting is performed to reduce water ingress into the tunnel to the level defined in the contract. When the water ingress requirements proved difficult to meet, it was obvious that the geological and the hydrogeological conditions in the tunnel would dictate the work processes. A distinctive change in rock conditions influenced both grouting performance and seepage into the tunnel. The rock conditions and the grouting were quantified throughout the project and these are summarized in this paper. It can be concluded that the strongest correlation is between the water ingress, the hydrogeological conditions and the density of the zones and the conditions in and around these zones. The paper suggests a different approach to hydrogeological prognosis and the grouting process, such as distribution of grouting classes, increased mixer capacities and regular use of two grouting rounds. (C) 2010 Elsevier Ltd. All rights reserved. |
author |
Stille, Björn Gustafson, Gunnar |
author_facet |
Stille, Björn Gustafson, Gunnar |
author_sort |
Stille, Björn |
title |
A review of the Namntall Tunnel project with regard to grouting performance |
title_short |
A review of the Namntall Tunnel project with regard to grouting performance |
title_full |
A review of the Namntall Tunnel project with regard to grouting performance |
title_fullStr |
A review of the Namntall Tunnel project with regard to grouting performance |
title_full_unstemmed |
A review of the Namntall Tunnel project with regard to grouting performance |
title_sort |
review of the namntall tunnel project with regard to grouting performance |
publishDate |
2010 |
url |
https://doi.org/10.1016/j.tust.2010.01.009 https://research.chalmers.se/en/publication/122954 |
genre |
Northern Sweden |
genre_facet |
Northern Sweden |
op_relation |
http://dx.doi.org/10.1016/j.tust.2010.01.009 https://research.chalmers.se/en/publication/122954 |
op_doi |
https://doi.org/10.1016/j.tust.2010.01.009 |
container_title |
Tunnelling and Underground Space Technology |
container_volume |
25 |
container_issue |
4 |
container_start_page |
346 |
op_container_end_page |
356 |
_version_ |
1766146970925137920 |