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Improving Ground geomechanical characteristic for Ground movement control in urban zone

نهمین همایش ملی تونل
Year: 1390
COI: ITC09_093
Language: EnglishView: 1,455
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H.R Pasand Masoumi - Ms.c student in Amirkabir University of Tehran;
H Salari Rad - Assistant professor of amirkabir university
k sarrafi - Ms.c of Rock mechanics , Amirkabir University of Tehran


Tunneling operation Analyses in 3D conditions is a widely used method to calculate tunneling induced settlement profiles as well as soil structure interactions. The potential of damage, for the surface and/or underground structures can be estimated using powerful finite difference method (FDM). However, setting up a realistic model that would be able to achieve this goal is rather difficult. In this paper, a 3D FDM analysis has been conducted to assess tunneling induced settlement and stress redistribution phenomena along with movements around shallow soft ground tunnels excavation. Displacements recorded during construction of the Line 1 subway Tunnel in Tehran formation were compared with the predicted values to validate numerical estimations. Back analysis carried out on FDM results of soil zone, the data groups that have best accordance with recorded measurements were selected. The results show that grouting has significant effect on tunnel stability and back analysis results have accordance with soil geotechnical properties and grouted zone. Soil strength parameters improved several times and soil permeability decrease significantly. Surveying groutability showed that an increasing in grouting pressure, makes grouting possible in this zone


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This Paper COI Code is ITC09_093. Also You can use the following address to link to this article. This link is permanent and is used as an article registration confirmation in the Civilica reference:

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Pasand Masoumi, H.R and Salari Rad, H and sarrafi, k,1390,Improving Ground geomechanical characteristic for Ground movement control in urban zone,09th Iranian Tunneling Conference,Tehran,

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  • In the construction of the Tehran metro Line 1, grouting ...
  • method .Tunnelling and Underground Space Technology. Vol. 18, Issues 2-3, ...
  • Consultants engineer report SANO, 2004. Tehran subway line 1, Initial ...
  • Jafari, M. R., Au S. K., Soga K, Bolton M.D., ...
  • Mahdoori, S., Fathi, E. 2007. Determination rock-mass geomechanic ...
  • In 10 June 2008 during top-face excavation of north tunnl ...
  • _ grouting for Jubilee Lie Extensiono. Symposium on Geotechnical Aspects ...
  • Schweiger, H. F. and Falk, E. (1998). Reduction of settlement ...
  • Raffle, ..F. Greenwood, D.A; 1961; The relation between the rheological ...
  • Coulter, P., 2004. Influence of tunnel jet-grouting on ground deformation ...

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