Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
The Use of the Continuity Factor as a Tool to Represent Representative Elementary Volume in Rock Engineering Design
KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Soil and Rock Mechanics.
2014 (English)Licentiate thesis, comprehensive summary (Other academic)
Place, publisher, year, edition, pages
Stockholm: KTH Royal Institute of Technology, 2014.
Series
TRITA-JOB. LIC, ISSN 1650-951X ; 2025
Keyword [en]
rock mass, scale effect, representative elementary volume, continuity factor
National Category
Geotechnical Engineering
Research subject
Civil and Architectural Engineering
Identifiers
URN: urn:nbn:se:kth:diva-144591OAI: oai:DiVA.org:kth-144591DiVA: diva2:714223
Presentation
2014-05-16, Sal B1, Brinellvägen 23, entreplan, KTH, Stockholm, 15:36 (English)
Opponent
Supervisors
Note

QC 20140428

Available from: 2014-04-28 Created: 2014-04-25 Last updated: 2014-04-28Bibliographically approved
List of papers
1. Numerical study on the continuity factor and the limits between continuous and discontinuous behaviors
Open this publication in new window or tab >>Numerical study on the continuity factor and the limits between continuous and discontinuous behaviors
2012 (English)In: ISRM International Symposium 28-30 May 2012, Stockholm, 2012Conference paper, Published paper (Refereed)
Abstract [en]

 Discontinuum approach or equivalent continuum approach is usually adopted in order to model the behavior of rock masses. The latter approach is more frequently used. However, this approach might be unacceptable for slightly-jointed rock masses. The continuity factor (CF), mainly derived from empirical experience, is defined as the ratio of the tunnel span to the block diameter. It is commonly used to determine whether a rock mass should be modeled as a continuum or a discontinuum material. Only a few analyses regarding the CF have been performed previously. In order to study the limits between continuous and discontinuous behavior, nu-merical analyses with UDEC have been performed. In these analyse, a rock mass with two sets of orthogonal joints are initially generated. From this rock mass, square areas corresponding to a certain CF are randomly chosen as models in UDEC. Confined compression test is conducted on the mentioned model and the constrained modulus (Dm) regarding this rock mass is calculated. Due to the variations of the relative loca-tions between the square and the joints cut inside, as well as the joint quantity and the joint lengths, several Dm are yielded for each CF. Several CFs are also analyzed and the results are compared with previous suggested limits between continuous and dis-continuous behaviors.

Keyword
rock mass behavior, continuity factor, excavation, joint
National Category
Geotechnical Engineering
Identifiers
urn:nbn:se:kth:diva-138851 (URN)
Conference
Eurock 2012
Note

QC 20140428

Available from: 2013-12-20 Created: 2013-12-20 Last updated: 2014-04-28Bibliographically approved
2. On the use of the continuity factor for rock mass properties based on a literature review of the representative elementary volume
Open this publication in new window or tab >>On the use of the continuity factor for rock mass properties based on a literature review of the representative elementary volume
2014 (English)In: Rock Engineering and Rock Mechanics: Structures in and on Rock Masses - Proceedings of EUROCK 2014, ISRM European Regional Symposium, Taylor & Francis Group, 2014, 427-431 p.Conference paper, Published paper (Refereed)
Abstract [en]

The REV (Representative Elementary Volume) is widely employed to define the scale limit when the continuum or discontinuum method is suitable for rock mass analyses. A simplified tool is needed as an aid to approximate this limit. The Continuity Factor (CF) was proposed by Palmstrom for this purpose. The definition of the CF implies that the joint spacing is the most significant parameter for the REV. However, other parameters might also influence the REV. In this paper, a literature review of derived REVs is performed. For each REV, the average block size is calculated. The correlation between the REV and the average block size index I-b is thereafter analyzed. The results show that a CF limit of approximately four may exist for the geometrical and the mechanical REV. If other parameters exists that significantly influence the REV are discussed.

Place, publisher, year, edition, pages
Taylor & Francis Group, 2014
Keyword
Permeability Tensor, Fracture System, Model
National Category
Geotechnical Engineering
Identifiers
urn:nbn:se:kth:diva-144582 (URN)000345985300067 ()2-s2.0-84901324228 (Scopus ID)978-1-138-00149-7 (ISBN)
Conference
2014 ISRM European Regional Symposium on Rock Engineering and Rock Mechanics: Structures in and on Rock Masses, EUROCK 2014, Vigo, Spain, 26 May 2014 through 28 May 2014
Note

QC 20150108

Available from: 2014-04-25 Created: 2014-04-25 Last updated: 2015-01-08Bibliographically approved
3. A comparison between the represenatative volume for circular excavations and rectangular rock mass samples
Open this publication in new window or tab >>A comparison between the represenatative volume for circular excavations and rectangular rock mass samples
(English)In: Rock Mechanics and Rock Engineering, ISSN 0723-2632, E-ISSN 1434-453XArticle in journal (Other academic) Submitted
National Category
Geotechnical Engineering
Identifiers
urn:nbn:se:kth:diva-144584 (URN)
Note

QS 2014

Available from: 2014-04-25 Created: 2014-04-25 Last updated: 2017-12-05Bibliographically approved

Open Access in DiVA

The Use of the Continuity Factor as a Tool to Represent Representative Elementary Volume in Rock Engineering Design(1298 kB)549 downloads
File information
File name FULLTEXT01.pdfFile size 1298 kBChecksum SHA-512
f167c180726a7d8f231df311d1a5704ef6b38411428714dfe1a060f0bbe4acc1806b8dc6ff08bb4ba8bcf497f67513d963a9ca06e00024f6a8521886565bd7f4
Type fulltextMimetype application/pdf

Search in DiVA

By author/editor
Zhou, Pin
By organisation
Soil and Rock Mechanics
Geotechnical Engineering

Search outside of DiVA

GoogleGoogle Scholar
Total: 549 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

urn-nbn

Altmetric score

urn-nbn
Total: 218 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf