Show simple item record

dc.contributor.authorJin-long, Liu
dc.contributor.authorHamza, Omar
dc.contributor.authorDavies-Vollum, K. Siân
dc.contributor.authorJie-qun, Liu
dc.date.accessioned2018-09-26T15:01:53Z
dc.date.available2018-09-26T15:01:53Z
dc.date.issued2018-07-12
dc.identifier.citationJin-long, L. et al. (2018) 'Repairing a shield tunnel damaged by secondary grouting', Tunnelling and Underground Space Technology, 80(313).en
dc.identifier.issn0886-7798
dc.identifier.doi10.1016/j.tust.2018.07.016
dc.identifier.urihttp://hdl.handle.net/10545/622992
dc.description.abstractThis paper reports on a repair work which has recently been conducted for a metro tunnel in Hefei city, China. The tunnel has been originally constructed using shield method where synchronous grouting was used to fill the gaps between the tunnel segments and soil. Following a regular maintenance inspection of the tunnel, several leakage issues were identified between three stations. Secondary grouting was adopted as a solution to block the tunnel leakage, however, shortly after the start of grouting work, the track and track bed were found to be unevenly uplifted with significant cracks in the tunnel’s segments. The paper describes and discusses key aspects of this case study including ground conditions, leakages patterns of the tunnel, recorded volumes and injection pressure of the secondary grouting, as well as survey data of track displacement and segment cracks. The investigation confirmed that the situation was caused by an inappropriate implementation of the secondary grouting, particularly by high grouting pressure (significantly higher than the geostatic pressure), large volumes of injected grout, and poor selection of grouting locations. Ground Penetrating Radar (GPR) was conducted to inspect the tunnel conditions before commencing the structural repair work, which revealed that there were no voids under the track bed of the affected zone. The study presents simplified strategies used to repair the damage while maintaining minimum disturbance to the affected segments.
dc.description.sponsorshipAnhui provincial department of education program for visiting professors (grant No. gxfxZD2016216) and Hefei university academic leaders’ project (grant No. 2016dtr01)en
dc.language.isoenen
dc.publisherElsevieren
dc.relation.urlhttps://linkinghub.elsevier.com/retrieve/pii/S0886779818301378en
dc.rightsArchived with thanks to Tunnelling and Underground Space Technologyen
dc.rights.urihttp://creativecommons.org/licenses/by-sa/4.0/*
dc.subjectShield tunnellingen
dc.subjectLeakageen
dc.subjectSecondary groutingen
dc.subjectTrack beden
dc.subjectUpliften
dc.subjectRepairen
dc.titleRepairing a shield tunnel damaged by secondary grouting.en
dc.typeArticleen
dc.contributor.departmentUniversity of Derbyen
dc.contributor.departmentHefei Universityen
dc.identifier.journalTunnelling and Underground Space Technologyen
dcterms.dateAccepted2018-07-08
refterms.dateFOA2019-07-12T00:00:00Z
html.description.abstractThis paper reports on a repair work which has recently been conducted for a metro tunnel in Hefei city, China. The tunnel has been originally constructed using shield method where synchronous grouting was used to fill the gaps between the tunnel segments and soil. Following a regular maintenance inspection of the tunnel, several leakage issues were identified between three stations. Secondary grouting was adopted as a solution to block the tunnel leakage, however, shortly after the start of grouting work, the track and track bed were found to be unevenly uplifted with significant cracks in the tunnel’s segments. The paper describes and discusses key aspects of this case study including ground conditions, leakages patterns of the tunnel, recorded volumes and injection pressure of the secondary grouting, as well as survey data of track displacement and segment cracks. The investigation confirmed that the situation was caused by an inappropriate implementation of the secondary grouting, particularly by high grouting pressure (significantly higher than the geostatic pressure), large volumes of injected grout, and poor selection of grouting locations. Ground Penetrating Radar (GPR) was conducted to inspect the tunnel conditions before commencing the structural repair work, which revealed that there were no voids under the track bed of the affected zone. The study presents simplified strategies used to repair the damage while maintaining minimum disturbance to the affected segments.


Files in this item

Thumbnail
Name:
Publisher version
Thumbnail
Name:
1-s2.0-S0886779818301378-main.pdf
Size:
2.712Mb
Format:
PDF
Description:
copy of the paper

This item appears in the following Collection(s)

Show simple item record

Archived with thanks to Tunnelling and Underground Space Technology
Except where otherwise noted, this item's license is described as Archived with thanks to Tunnelling and Underground Space Technology