Outstanding issues in excavation of deep and long rock tunnels: a case study
Excavation of deep and long tunnels faces several distinctive challenges such as unknown geological structures, high groundwater pressure, and high in situ stress, as compared with conventional tunnels. The deep and long Taining tunnel in Fujian Province, South China, was excavated in complex geolog...
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crcansciencepubl:10.1139/cgj-2013-0087 2024-09-09T19:51:22+00:00 Outstanding issues in excavation of deep and long rock tunnels: a case study Zhang, Guo-Hua Jiao, Yu-Yong Wang, Hao 2014 http://dx.doi.org/10.1139/cgj-2013-0087 http://www.nrcresearchpress.com/doi/full-xml/10.1139/cgj-2013-0087 http://www.nrcresearchpress.com/doi/pdf/10.1139/cgj-2013-0087 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Geotechnical Journal volume 51, issue 9, page 984-994 ISSN 0008-3674 1208-6010 journal-article 2014 crcansciencepubl https://doi.org/10.1139/cgj-2013-0087 2024-08-01T04:10:01Z Excavation of deep and long tunnels faces several distinctive challenges such as unknown geological structures, high groundwater pressure, and high in situ stress, as compared with conventional tunnels. The deep and long Taining tunnel in Fujian Province, South China, was excavated in complex geological settings. This tunnel had to pass through various squeezing fault zones and intensely jointed zones. Large deformations and high-pressure groundwater were frequently encountered during excavation. To predict the potential adverse geological structures, a comprehensive method, which included tunnel seismic prediction and ground penetration radar detection as well as horizontal drilling, was developed. Energy release and pressure reduction, as well as timely sealing, pre-excavation curtain grouting, and radial grouting were adopted to control the high-pressure groundwater. Countermeasures including improvement of support stiffness, double-layered primary support, and pre-support, increase of preset deformation, grouting reinforcement, and timely installation of permanent lining were taken to ensure safe construction in the surrounding rock masses under high in situ stress. Article in Journal/Newspaper Long Rock Canadian Science Publishing Long Rock ENVELOPE(-61.198,-61.198,-62.689,-62.689) Canadian Geotechnical Journal 51 9 984 994 |
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Open Polar |
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Canadian Science Publishing |
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crcansciencepubl |
language |
English |
description |
Excavation of deep and long tunnels faces several distinctive challenges such as unknown geological structures, high groundwater pressure, and high in situ stress, as compared with conventional tunnels. The deep and long Taining tunnel in Fujian Province, South China, was excavated in complex geological settings. This tunnel had to pass through various squeezing fault zones and intensely jointed zones. Large deformations and high-pressure groundwater were frequently encountered during excavation. To predict the potential adverse geological structures, a comprehensive method, which included tunnel seismic prediction and ground penetration radar detection as well as horizontal drilling, was developed. Energy release and pressure reduction, as well as timely sealing, pre-excavation curtain grouting, and radial grouting were adopted to control the high-pressure groundwater. Countermeasures including improvement of support stiffness, double-layered primary support, and pre-support, increase of preset deformation, grouting reinforcement, and timely installation of permanent lining were taken to ensure safe construction in the surrounding rock masses under high in situ stress. |
format |
Article in Journal/Newspaper |
author |
Zhang, Guo-Hua Jiao, Yu-Yong Wang, Hao |
spellingShingle |
Zhang, Guo-Hua Jiao, Yu-Yong Wang, Hao Outstanding issues in excavation of deep and long rock tunnels: a case study |
author_facet |
Zhang, Guo-Hua Jiao, Yu-Yong Wang, Hao |
author_sort |
Zhang, Guo-Hua |
title |
Outstanding issues in excavation of deep and long rock tunnels: a case study |
title_short |
Outstanding issues in excavation of deep and long rock tunnels: a case study |
title_full |
Outstanding issues in excavation of deep and long rock tunnels: a case study |
title_fullStr |
Outstanding issues in excavation of deep and long rock tunnels: a case study |
title_full_unstemmed |
Outstanding issues in excavation of deep and long rock tunnels: a case study |
title_sort |
outstanding issues in excavation of deep and long rock tunnels: a case study |
publisher |
Canadian Science Publishing |
publishDate |
2014 |
url |
http://dx.doi.org/10.1139/cgj-2013-0087 http://www.nrcresearchpress.com/doi/full-xml/10.1139/cgj-2013-0087 http://www.nrcresearchpress.com/doi/pdf/10.1139/cgj-2013-0087 |
long_lat |
ENVELOPE(-61.198,-61.198,-62.689,-62.689) |
geographic |
Long Rock |
geographic_facet |
Long Rock |
genre |
Long Rock |
genre_facet |
Long Rock |
op_source |
Canadian Geotechnical Journal volume 51, issue 9, page 984-994 ISSN 0008-3674 1208-6010 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/cgj-2013-0087 |
container_title |
Canadian Geotechnical Journal |
container_volume |
51 |
container_issue |
9 |
container_start_page |
984 |
op_container_end_page |
994 |
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1809920658117754880 |