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Pressure Infiltration Characteristics of Foam for EPB Shield Tunnelling
Tao Xu1; Adam Bezuijen2; Wan-Huan Zhou1
2019-11-29
Conference Name4th International Conference on Geotechnics for Sustainable Infrastructure Development (GEOTEC HANOI)
Source PublicationLecture Notes in Civil Engineering: GEOTECHNICS FOR SUSTAINABLE INFRASTRUCTURE DEVELOPMENT
Volume62
Pages235-239
Conference DateNOV 28-29, 2019
Conference PlaceHanoi, VIETNAM
CountryVIETNAM
Publication PlaceSINGAPORE
PublisherSPRINGER-VERLAG SINGAPORE PTE LTD
Abstract

Infiltration of pressurised foam into saturated sand has been investigated in a laboratory setup that provides a comparable hydraulic gradient as in real tunnels. It appears that the permeability of sand for foam decreases as FER of the foam increases until a limit FER (approximately 15 for the foaming agent and sand used in this experiment). For higher FERs the permeability remains more or less constant. It was found that a ‘dry’ foam (FER = 20) is not essential for formation of a low permeable layer in the sand, even a ‘wet’ foam (FER = 5) can form a low permeable layer. When the discharge is less than that corresponding to the drilling velocity of a TBM, there will be no foam spurt and consequently no zone with low permeability. Without a low permeability plastering at the tunnel face the pressure applied through the foam will be less effective to stabilize the face.

KeywordFoam Epb Shield Infiltration Permeability Fer
DOI10.1007/978-981-15-2184-3_29
URLView the original
Indexed ByCPCI-S
Language英語English
WOS Research AreaEngineering
WOS SubjectEngineering, civilEngineering, Geological
WOS IDWOS:000613129800029
Scopus ID2-s2.0-85076766832
Fulltext Access
FWCI0.4768729
Citation statistics
Cited Times [WOS]:0   [WOS Record]     [Related Records in WOS]
Document TypeConference paper
CollectionDEPARTMENT OF CIVIL AND ENVIRONMENTAL ENGINEERING
Corresponding AuthorTao Xu
Affiliation1.University of Macau,Macao,Macao
2.Ghent University,Ghent,Belgium
First Author AffilicationUniversity of Macau
Corresponding Author AffilicationUniversity of Macau
Recommended Citation
GB/T 7714
Tao Xu,Adam Bezuijen,Wan-Huan Zhou. Pressure Infiltration Characteristics of Foam for EPB Shield Tunnelling[C]. SINGAPORE:SPRINGER-VERLAG SINGAPORE PTE LTD,2019:235-239.
APA Tao Xu,Adam Bezuijen,&Wan-Huan Zhou.(2019).Pressure Infiltration Characteristics of Foam for EPB Shield Tunnelling.Lecture Notes in Civil Engineering: GEOTECHNICS FOR SUSTAINABLE INFRASTRUCTURE DEVELOPMENT,62,235-239.
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