Numerical analysis of the effect of joint geometric parameters on grouting process in jointed rock mass

A. Maadikhah, A. Mortazavi

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Today, grouting is used as an aid in ground improvement in most civil and mining projects. Groutability and grout penetration depth are subjects that are considered in grouting operation. As discontinuities compose the main paths for fluid flow in jointed rock mass, geometric characteristics, such as joint aperture, spacing and orientation, affect the grout flow. On the other hand, fluid flow in joint is a hydromechanical process and the state of applied stress on joint affects the fluid flow. Knowledge of these parameters has advantages in prediction of grouting results (grout penetration and intake). Unlike water (Newtonian fluid), stable cement-based grout usually acts as a Bingham fluid. In this study the effect of important joint geometric characteristics on grout intake and penetration depth was simulated hydromechanically using the UDEC code. The gained results show that grout intake and penetration depth increase as joint aperture and normal stiffness increase and in-situ stress decreases. Increase in joint spacing does not have any effect on penetration depth but decreases the grout intake. The effect of joint orientation on grouting process is strongly dependent on in-situ stress state.

Original languageEnglish
Title of host publicationISRM International Symposium - 5th Asian Rock Mechanics Symposium 2008, ARMS 2008
EditorsAbbas Mahdi, Abdolhadi Ghazvinian
PublisherInternational Society for Rock Mechanics
Pages1125-1133
Number of pages9
ISBN (Print)9781617823527
Publication statusPublished - Jan 1 2008
Externally publishedYes
Event5th Asian Rock Mechanics Symposium 2008, ARMS 2008 - Tehran, Iran, Islamic Republic of
Duration: Nov 24 2008Nov 26 2008

Publication series

NameISRM International Symposium - 5th Asian Rock Mechanics Symposium 2008, ARMS 2008

Conference

Conference5th Asian Rock Mechanics Symposium 2008, ARMS 2008
CountryIran, Islamic Republic of
CityTehran
Period11/24/0811/26/08

Keywords

  • Grout Intake
  • Grout Penetration Depth
  • Grout Rheology
  • Jointed Rock Mass
  • Numerical Analysis

ASJC Scopus subject areas

  • Geochemistry and Petrology
  • Geophysics

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  • Cite this

    Maadikhah, A., & Mortazavi, A. (2008). Numerical analysis of the effect of joint geometric parameters on grouting process in jointed rock mass. In A. Mahdi, & A. Ghazvinian (Eds.), ISRM International Symposium - 5th Asian Rock Mechanics Symposium 2008, ARMS 2008 (pp. 1125-1133). (ISRM International Symposium - 5th Asian Rock Mechanics Symposium 2008, ARMS 2008). International Society for Rock Mechanics.