الفهرس 
EL-SALAM TUNNEL PROJECT AND INTRODUCTIONOnly 14 pages are availabe for public view
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Abstract
The project of El-Salam Syphon under Suez Canal is considered one of the big
and important projects at this time. So, an advanced method of nonlinear hybrid finite
element analysis of tunnels is applied. The mechanical behavior of the used materials
for the soil model is studied within the nonlinear elastic model (Duncan model), and
the nonlinear inelastic model (Druger-Prager elastic-perfectly plastic model) separately
and the results are compared with each other. The numerical results with the field
parameters for both the soil and lining are compared with the field measurements
obtained from the El-Salarn Syphon under Suez Canal and it is in a good agreement
with the field data. The case of the complete construction of the first tunnel, is known as long term.
displacement, the main task of this case is to evaluate the response of the first tunnel
a long period after construction of the secondary lining.An elasto-plastic model based on Druger- Prager elastic -perfectly plastic model
in the three-dimensional analysis is prepared for simulating the soil continuum with
haJfthe model is excavated and the bentonite slurry machine (TBM) is working at the
end of excuation, comparison of the results with actual case of the El-Salam Syphon
under Suez Canal shows the effects of the method of soil support and those of the
ground condition on the displacement field around the excavation and on the liner
loading system.
Four cases are considered in ana’ysis of multiple tunnels spaced by 15meters
centerline to centerline with the spacing to diameter ratio equal 2.30, according to the
stages of construction. The different contour maps for stresses and displacement are
analyzed for each case and the effect of excavation of one tunnel on the nei&hboring
tunnels is also analyzed.