Volume List  / Volume 5 (2)



DOI: 10.7708/ijtte.2015.5(2).02

5 / 2 / 93-107 Pages


Hamdy.H.A. Abd-el.rahim - Department of Civil Engineering, Assiut University, Assiut, 71516, Egypt -

Mahmoud Enieb - Department of Civil Engineering, Assiut University, Assiut, 71516, Egypt -

Ahmed Abdelmoamen Khalil - Department of Civil Engineering, Shoubra faculty of Engineering, Benha University Benha, 11629, Egypt -

Abdou SH.Ahmed - Department of Civil Engineering, Assiut University, Assiut, 71516, Egypt -


The study objective of this paper is analysis of different loads affecting the urban railway tunnel systems to determine the optimum tunnel system (single tunnel or twin tunnel). A case study is The Greater Cairo metro line No. 4, which passes under the River Nile in Egypt land. Analysis of settlement and stresses was carried out using three different finite element programs (Ansys, Plaxis and Rocscience Phase). We obtained optimum dimension of the model for the different tunnel systems. Also, vertical and horizontal bed River Nile settlements were computed for single and twin tunnel by the above mentioned programs. The comparison between the two systems in terms of bending moments and settlement is presented. Also, the procedures of construction of the twin tunnel underneath the River Nile were discussed. Moreover, the effect of the train loads on the settlement profile and the horizontal displacement of bed River Nile were evaluated for single and twin tunnel systems. Based on the calculated result, higher stresses in bottom tunnel (twin tunnel system) increased by 100% about stresses in a single tunnel. When trains pass through the tunnel, stresses decrease about 10% for single tunnel and about 5% for twin tunnels.

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Authors would like to acknowledge the providing of data by the members of National Authority of Tunnels in Cairo.


Ardaman – ACE. 2009. Geological Cross Section Profiles of Cairo Metro Line 4.


Chehade, F.H.; Shahrour, I. 2008. Numerical analysis of the interaction between twin-tunnels: Influence of the relative position and construction procedure, Tunnelling and Underground Space Technology. DOI: http://dx.doi.org/10.1016/j.tust.2007.03.004, 23(2): 210-214.


Chen, S-L.; Gui, M-W.; Yang, M-C. 2012. Applicability of the principle of superposition in estimating the ground surface settlement of twin- and quadruple-tube tunnels, Tunnelling and Underground Space Technology. DOI: http://dx.doi.org/10.1016/j.tust.2011.10.005, 28(2012): 135-149.


Garner, C.E.; Coffman, R.A. 2012. Subway tunnel design using a ground surface settlement profiles to characterize an acceptable configuration, Tunnelling and Underground Space Technology. DOI: http://dx.doi.org/10.1016/j.tust.2012.06.013, 35(2013): 219-226.


Khalil, A. 2002. The Effect of Different Design Parameters of Suburban Curved Tracks on Wear and Lifetime of Rails, Doctoral thesis. 141 p.


Mazek, S.A. 2011. 3-D Nonlinear Numerical Analysis to study the Performance of Twin Tunnel System, Civil Engineering Department, Military Technical College, Cairo, Egypt.


Mazek, S.A.; Almannaei, H.A. 2013. Finite element model of Cairo metro tunnel-Line 3performance, Ain Shams Engineering Journal. DOI: http://dx.doi.org/10.1016/j.asej.2013.04.002, 4(4): 709-716.


Migliazza, M.; Chiorboli, M.; Giani, G.P. 2009. Comparison of analytical method, 3D finite element model with experimental subsidence measurements resulting from the extension of the Milan underground, Computers and Geotechnics. DOI: http://dx.doi.org/10.1016/j.compgeo.2008.03.005, 36(1-2): 113-124.


Moller, S.C. 2006. Tunnel induced settlements and structural forces in linings. Doctoral thesis. 174 p.


National Authority for Tunnels (NAT). 2009. Ardaman-ACE, Boring Holes for Line No. 4 project.


National Authority for Tunnels (NAT). 2010, 2011, 2012. Japan International Cooperation Agency (JICA), Project Documents.


Nejati, H.R.; Ahmadi, M.; Hashemolhosseini, H.; Hayati, M. 2012. Probabilistic Analysis of Ground Surface Vibration Due to Train Movement, a Case Study on Tehran Metro Line 4, Geotechnical and Geological Engineering. DOI: http://dx.doi.org/10.1007/s10706-012-9528-z, 30(5): 1137-1146.


Wang, C.; Su, Z. 2011. Feasibility Study on Step Method Excavation of Tunnels with Large Cross Section and Small Interval. In International Conference on Environmental Science and Engineering. DOI: http://dx.doi.org/10.1016/j.proenv.2012.01.316, 12(Part A, 2012): 550-554.


Wang, Z.; Wong, R.C.K.; Li, S.; Qiao, L. 2012. Finite element analysis of long-term surface settlement above a shallow tunnel in soft ground, Tunneling and Underground Space Technology. DOI: http://dx.doi.org/10.1016/j.tust.2012.02.010, 30(2012): 85-92.