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postgraduate thesis: TBM tunnelling through unfavourable ground conditions : a case study, SSDS tunnel F, Hong Kong

TitleTBM tunnelling through unfavourable ground conditions : a case study, SSDS tunnel F, Hong Kong
Authors
Issue Date2013
PublisherThe University of Hong Kong (Pokfulam, Hong Kong)
Citation
Lokusethu Hewage Don, D. H.. (2013). TBM tunnelling through unfavourable ground conditions : a case study, SSDS tunnel F, Hong Kong. (Thesis). University of Hong Kong, Pokfulam, Hong Kong SAR. Retrieved from http://dx.doi.org/10.5353/th_b5094859
AbstractA study of the Strategic Sewage Disposal Scheme (SSDS) Stage 1 Tunnel F in Hong Kong was carried out as it is a great example of deep sub-sea hard rock TBM tunnelling through unfavourable, fault-affected ground conditions with heavy water inflows. The main objective of this study was to document events that took place during Tunnel F excavation and collate geological and geotechnical data related to the excavation, to aid future tunnel designers and contractors to assess the risk involved with such tunnelling projects. Data relevant to Tunnel F was collected from many personnel involved with the excavation, and from the Hong Kong Geological Survey (HKGS) of the Geotechnical Engineering Office. Geological maps, ground investigation data, tunnel mapping records, ground water inflow records and grouting records were reviewed and used to summarise the ground conditions and to analyse various potential relationships. Knowledge of ground conditions is the most important requirement for any tunnelling project. This dissertation addresses the differences between actual and predicted ground conditions and the consequences of lack of ground investigation data. The major difference between predicted and observed ground conditions during Tunnel F excavation was the amount of water ingress into the tunnel. Hundreds of liters per minute of water at up to 13bar pressure was encountered from a few probe and grout holes. In the Tolo Channel Fault area, low Q values and very high ground water inflows were experienced, and heavy temporary support and large grout volumes were required to complete the tunnel.
DegreeMaster of Science
SubjectTunneling - China - Hong Kong - Case studies
Boring machinery - China - Hong Kong - Case studies
Engineering geology - China - Hong Kong - Case studies
Dept/ProgramApplied Geosciences
Persistent Identifierhttp://hdl.handle.net/10722/192957

 

DC FieldValueLanguage
dc.contributor.authorLokusethu Hewage Don, Danuska Hasitha-
dc.date.accessioned2013-12-14T06:23:20Z-
dc.date.available2013-12-14T06:23:20Z-
dc.date.issued2013-
dc.identifier.citationLokusethu Hewage Don, D. H.. (2013). TBM tunnelling through unfavourable ground conditions : a case study, SSDS tunnel F, Hong Kong. (Thesis). University of Hong Kong, Pokfulam, Hong Kong SAR. Retrieved from http://dx.doi.org/10.5353/th_b5094859-
dc.identifier.urihttp://hdl.handle.net/10722/192957-
dc.description.abstractA study of the Strategic Sewage Disposal Scheme (SSDS) Stage 1 Tunnel F in Hong Kong was carried out as it is a great example of deep sub-sea hard rock TBM tunnelling through unfavourable, fault-affected ground conditions with heavy water inflows. The main objective of this study was to document events that took place during Tunnel F excavation and collate geological and geotechnical data related to the excavation, to aid future tunnel designers and contractors to assess the risk involved with such tunnelling projects. Data relevant to Tunnel F was collected from many personnel involved with the excavation, and from the Hong Kong Geological Survey (HKGS) of the Geotechnical Engineering Office. Geological maps, ground investigation data, tunnel mapping records, ground water inflow records and grouting records were reviewed and used to summarise the ground conditions and to analyse various potential relationships. Knowledge of ground conditions is the most important requirement for any tunnelling project. This dissertation addresses the differences between actual and predicted ground conditions and the consequences of lack of ground investigation data. The major difference between predicted and observed ground conditions during Tunnel F excavation was the amount of water ingress into the tunnel. Hundreds of liters per minute of water at up to 13bar pressure was encountered from a few probe and grout holes. In the Tolo Channel Fault area, low Q values and very high ground water inflows were experienced, and heavy temporary support and large grout volumes were required to complete the tunnel.-
dc.languageeng-
dc.publisherThe University of Hong Kong (Pokfulam, Hong Kong)-
dc.relation.ispartofHKU Theses Online (HKUTO)-
dc.rightsCreative Commons: Attribution 3.0 Hong Kong License-
dc.rightsThe author retains all proprietary rights, (such as patent rights) and the right to use in future works.-
dc.subject.lcshTunneling - China - Hong Kong - Case studies-
dc.subject.lcshBoring machinery - China - Hong Kong - Case studies-
dc.subject.lcshEngineering geology - China - Hong Kong - Case studies-
dc.titleTBM tunnelling through unfavourable ground conditions : a case study, SSDS tunnel F, Hong Kong-
dc.typePG_Thesis-
dc.identifier.hkulb5094859-
dc.description.thesisnameMaster of Science-
dc.description.thesislevelMaster-
dc.description.thesisdisciplineApplied Geosciences-
dc.description.naturepublished_or_final_version-
dc.identifier.doi10.5353/th_b5094859-
dc.date.hkucongregation2013-

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