Record Details

STABILITY ANALYSIS OF A SHALLOW DEPTH METRO TUNNEL: A NUMERICAL APPROACH

DSpace at IIT Bombay

View Archive Info
 
 
Field Value
 
Title STABILITY ANALYSIS OF A SHALLOW DEPTH METRO TUNNEL: A NUMERICAL APPROACH
 
Creator MONJEZI, M
RAHMANI, BN
TORABI, SR
SINGH, TN
 
Subject Numerical modelling
Soil nailing
Shield tunnelling
Subsidence
 
Description In this paper, an attempt has been made to use numerical modelling for simulating a long halt in construction process at a shallow depth metro tunnel and investigate the effects of soil nailing to increase the tunnel face strength. Finite difference software FLAC with high applicability in a continuum environment was adopted for this study. The tunnel is being excavated for Tehran metro project. Shield tunnelling with roadheader and back hoe cutting tools is applied in the excavation process. Mohr-Coulomb elasto-plastic constitutive law is considered to model the ground. After two months halting in excavation process, tunnel instability and ground subsidence were recorded in thirteen different monitoring points. Numerical simulation results showed a close approximation (11-16%) between measured and FLAC computed displacements of the tunnel crown in case of unsupported face, which is in close proximity and a proof indicates the reliability of simulation. Also, simulation results exhibit a significant reduction in the ground subsidence and tunnel instability in case of supported face by means of the soil nailing.
 
Publisher POLISH ACAD SCIENCES, STRATA MECHANICS RES INST
 
Date 2014-10-15T15:23:55Z
2014-10-15T15:23:55Z
2012
 
Type Article
 
Identifier ARCHIVES OF MINING SCIENCES, 57(3)535-545
http://dx.doi.org/10.2478/v10267-012-0035-0
http://dspace.library.iitb.ac.in/jspui/handle/100/15144
 
Language en