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Behaviour of Rock Fractures under Grout Pressure Loadings: Basic Mechanisms and Special Cases
KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Soil and Rock Mechanics. (Jord och bergmekanik)
2009 (English)Doctoral thesis, comprehensive summary (Other academic)
Place, publisher, year, edition, pages
Stockholm: KTH , 2009. , 102 p.
Series
Trita-JOB PHD, ISSN 1650-9501 ; 1012
Keyword [en]
Fracture mechanics, grouting, jacking
National Category
Building Technologies
Identifiers
URN: urn:nbn:se:kth:diva-9787OAI: oai:DiVA.org:kth-9787DiVA: diva2:128462
Public defence
2009-01-22, F3, KTH, Lindstedtsvägen 26, Stockholm, 10:00 (English)
Opponent
Supervisors
Note
QC 20100714Available from: 2008-12-19 Created: 2008-12-17 Last updated: 2010-07-15Bibliographically approved
List of papers
1. Fracture dilation during grouting
Open this publication in new window or tab >>Fracture dilation during grouting
2009 (English)In: Tunnelling and Underground Space Technology, ISSN 0886-7798, Vol. 24, 126-135 p.Article in journal (Refereed) Published
Abstract [en]

Sealing underground excavations from ingress of water constitutes a large part of both the cost and the risk for many infrastructure projects. In this paper we present a mechanical model for the rock mass response when grouting hard jointed rock. The model predicts a stiff and a non-stiff behaviour and a transition between them that is dependent on the relationship between the grouting pressure and the in situ stress conditions. The predictions are consistent with previously published measurements and explain grouting behaviour that has been difficult to model with previous methods.

Keyword
Grouting; Contact pressure; Fracture mechanics; Jacking
National Category
Materials Engineering
Identifiers
urn:nbn:se:kth:diva-9788 (URN)10.1016/j.tust.2008.05.004 (DOI)000263423700002 ()2-s2.0-58249094409 (Scopus ID)
Note
QC 20100714Available from: 2008-12-19 Created: 2008-12-19 Last updated: 2010-12-06Bibliographically approved
2. Fracture-Fracture Interaction during Grouting
Open this publication in new window or tab >>Fracture-Fracture Interaction during Grouting
2010 (English)In: Tunnelling and Underground Space Technology, ISSN 0886-7798, Vol. 25, 199-204 p.Article in journal (Refereed) Published
Abstract [en]

Sealing of self-supporting underground constructions is often done with grouting or pre-grouting, most often with cementitious grouts. In order to achieve sufficient sealing, fine fractures must be penetrated long distances before the grout hardens. This is achieved with high injection pressures that rivals the in situ stress normal to the fractures. In this paper, the interaction of parallel fractures during high pressure grouting is modelled and the influence of the resulting dilation is discussed. Both linear and non-linear fracture stiffness is used in the modelling.

Keyword
Grouting; Fracture mechanics; Jacking; Non-linear fracture stiffness
National Category
Building Technologies
Identifiers
urn:nbn:se:kth:diva-9789 (URN)10.1016/j.tust.2009.11.003 (DOI)000276288400001 ()2-s2.0-77949540285 (Scopus ID)
Note
QC 20100714Available from: 2008-12-19 Created: 2008-12-19 Last updated: 2011-01-12Bibliographically approved

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CiteExportLink to record
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Citation style
  • apa
  • harvard1
  • ieee
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More styles
Language
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  • Other locale
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Output format
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