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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
FWCI0.46083754
Citation statistics
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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