Fathalla Mohamed F. El-Nahhas
Fathalla Mohamed F. El-Nahhas
Emeritus Professor at Structural Engineering
Career Information
Academic Information
Brief
• More than fifty years of experience in teaching undergraduate and postgraduate courses as well as professional training programs in Egypt and Canada on geotechnical engineering, foundations, tunnelling, underground structures, rock mechanics, engineering geology and numerical methods for geotechnical engineering.
• Supervised eightteen Ph. D. theses and 40 M. Sc. theses on various geotechnical engineering topics.
• Author (or co-author) of more than 100 papers on different aspects of geotechnical engineering, tunnelling, underground structures and geological engineering.
Awards
The Merit Prize of Ain Shams University in Engineering Sciences (2012).
The Egyptian Pendant of Excellence (1997).
The Egyptian State Prize in the Engineering Sciences (1996).
Undergraduate Distinction Award, Ain Shams University (1969-1972).
Books
El-Nahhas, F. (1975) Contact pressure under rectangular plates loaded at the edges. M. Sc. Thesis, Department of Structural Engineering, Ain Shams University, Cairo, Egypt.
El-Nahhas, F. (1977) Field measurements in two tunnels in Edmonton, Canada. M. Sc. Thesis, Geotechnical Engineering, University of Alberta, Canada, 85 p.
El-Nahhas, F. (1981) Behaviour of tunnels in stiff soils. Ph. D. Thesis, Geotechnical Engineering, University of Alberta, Canada, 305 p.
Eisenstein, Z.; El-Nahhas, F.; and Shalaby, A. (1987) Cairo Metro Research Project-Final Research Report. Submitted to International Development Research Centre, Ottawa and National Authority for Tunnels, Cairo.
El-Nahhas, F.; Sherif, M.; Abdullah, W.; Hadi, K. and Ghoneim, H. (2000) Long-term operation, monitoring and assessment of the drainage system at Shamiyah and Kaifan (Final Main Research Report). Report submitted to the Kuwaiti Ministry of Electricity and Water, Kuwait Institute for Scientific Research, 202 p.
Articles
Eisenstein, Z.; El-Nahhas, F.; and Thomson, S. (1979) Pressure-displacement relations of two systems of tunnel lining. Presented at the Spec. Session on Tunnels in Soft Ground, 6th Pan-American Conf. on Soil Mechanics and Foundation Engineering, Lima, Peru. Published in “Soft Ground Tunneling-Failures and Displacements”, Pub. A. A. Balkema, pp. 85-94.
Thomson, S. and El-Nahhas, F. (1980) Field measurements in two tunnels in Edmonton, Alberta, Canadian Geotechnical Journal, Vol. 17, No.1, pp. 20-33.
Eisenstein, Z.; El-Nahhas, F.; and Thomson, S. (1981) Strain field around a tunnel in stiff soil. Proc. 10th Int. Conf. on Soil Mech. and Found. Eng., Stockholm, Vol. 1, Session 2, pp. 282-288. (http://issmge.org/uploads/publications/1/35/1981_01_0052.pdf)
Medeiros, L. V.; El-Nahhas, F.; Smith, L. B.; and Eisenstein, Z. (1982) Modelling of the construction of an underground station. Proc. 4th Int. Conf. on Numerical Methods in Geomechanics, Edmonton, Vol. 2, pp. 929-934.
El-Kadi, F.; El-Nahhas, F.; and El-Nawawy, O. (1984) Experimental and analytical studies on beams and plates resting on elastic foundations. Proc. of Modern Trends in Reinforced Concrete Structures, Ain Shams University, Paper No. 8, 32 p.
El-Kadi, F. and El-Nahhas, F. (1984) SCPT-DCPT correlations for some Egyptian soils. Bulletin of Faculty of Engineering, Ain Shams University, Vol. 15, No. 1, pp. C12/1-C12/23.
El-Kadi, F. and El-Nahhas, F. (1985) Evaluation of swelling behaviour of expansive soil containing sand piles. Bulletin of Faculty of Engineering, Ain Shams University, Vol. 17, No. 1, pp. 365-394.
El-Nahhas, F. (1985) Finite element deformation analysis of an earth dam. Proc. of 20th Annual Conference on Statistics, Computer Science and Operation Research, Cairo University, Vol. 4, pp. 1-19.
El-Kadi, F. and El-Nahhas, F. (1985) Some analytical aspects of soil-structure interaction of shallow foundations. Proc. of 10th Annual Congress for Statistics, Computer Science, Social and Demographic Research, Ain Shams University, pp. 65-81.
El-Nahhas, F.(1986) Spatial mode of ground subsidence above advancing shielded tunnels, Proceedings of International Congress on Large Underground Openings, Florence, Italy, Vol. 1, pp. 720-725.
El-Kadi, F.; El-Nahhas, F.; and Hamouda, A. (1986) Shear behaviour of shelly soils. Bulletin of Faculty of Engineering, Ain Shams University, Vol. 18, No. 1, pp. 174-188.
El-Kadi, F.; El-Nahhas, F.; and El-Ashal, A. (1986) Iterative analysis of foundations resting on swelling soils. Proc. of Micro-Computers in Civil Engineering, Cairo, Ain Shams University, Egyptian Society of Engineers, Canadian Society of Civil Engineers, Paper No. 7, 15 p.
El-Nahhas, F. and Harris, M. (1987) Finite element simulation of deformation of an earth dam constructed on yielding subsoil. Proc. of 12th Int. Cong. for Statistics, and Computer Science Research, Cairo, Egypt, Vol. 9, pp. 331-347.
El-Nahhas, F. (1987) Prediction of ground movement adjacent to a supported deep excavation. Proc. of 9th African Regional Conference on Soil Mechanics and Foundation Engineering, Nigeria, Vol. 1, pp. 285-291.
El-Nahhas, F.; Harris, M.; and Hughes, J. (1988) Geotechnical assessment of pile foundation of an old building. Proc. of Int. Conf. on Structural Safety, Ain Shams University and McMaster University, Session VII, Paper No. 8, 15 p.
Howeedy, F.; El-Nahhas, F.; and Sheded, L. (1988) Physical and mechanical engineering properties of slightly cemented soil. Bulletin of Faculty of Engineering, Ain Shams University, Vol. 22, No. 1, pp. 173-185.
El-Nahhas, F.; Eisenstein, Z.; Shalaby, A. H.; Abdel-Salam, M.; and El-Bedaiwy, S. (1988) Geotechnical performance of diaphragm walls during construction of Cairo Metro tunnel. Proc. Int. Congress on Tunnels and Water, ITA, Madrid, Spain, Vol. 1, pp. 259-266.
El-Nahhas, F.; El-Kadi, F.; and Hamdy, U. (1989) Finite element deformation analysis of tunnels. Proc. of the Int. Conf. on Structural Engineering, Ain Shams University & Canadian Society of Civil Engineers, Paper No. 24, Session 4A, 14 p.
El-Kadi, F.; El-Nahhas, F.; and El-Mahdy, O. (1989) Analysis of grid foundations resting on elastic soils. Proc. of the Int. Conf. on Structural Engineering, Ain Shams University & Canadian Society of Civil Engineers, Paper No. 40, Session 6A, 16 p.
El-Kadi, F.; El-Nahhas, F.; and El-Mossallamy, Y. (1989) Analysis of pile-raft-soil interaction. Proc. of the Int. Conf. on Structural Engineering, Ain Shams University & Canadian Society of Civil Engineers, Paper No. 41, Session 6A, 20 p.
El-Nahhas, F.; Eisenstein, Z.; and Shalaby, A. H. (1989) Behaviour of diaphragm walls during construction of Cairo Metro. Proc. of the 12th Int. Conf. on Soil Mechanics and Foundation Engineering, Rio de Janeiro, Brazil, pp. 1483-1486. (http://issmge.org/uploads/publications/1/33/1989_03_0004.pdf)
El-Nahhas, F.; El-Kadi, F.; and Hamdy, U. (1989) Soil deformation around shallow and deep tunnels in stiff soils. Proc. of the Int. Cong. on Progress and Innovation in Tunnelling, ITA, Toronto, Canada. Vol. 1, pp. 281-288.
El-Nahhas, F.; El-Kadi, F.; and Shalaby, A. G. (1990) Field measurements during construction of a compressed air tunnel in Cairo. Proc. of the Int. Congress on Tunnels and Underground Works-Today and Future, Chengdu, China, pp. 375-382 (Also see T & UST Journal, Pergamon Press, Vol. 6, No. 1 pp. 123-127.
El-Nahhas, F.; Eisenstein, Z.; and Shalaby, A. H. (1990) In-situ behaviour of Orabi subway station during construction. Proc. of First Alexandria Conference on Structural and Geotechnical Engineering, Alexandria University, Egypt, Vol. 1, pp. 189-198.
El-Nahhas, F.; Moustafa, A.; and Abdel-Tawab, S. (1990) Geotechnical characteristics of limestone formations of Gebel Mokattam area. Proc. of First Alexandria Conference on Structural and Geotechnical Engineering, Alexandria University, Egypt, Vol. 1, pp. 9-19.
El-Nahhas, F. (1991) Ground settlement above urban tunnels constructed using bentonite slurry machines. Proc. of Int. Symposium on Tunnelling in Congested Cities - National Authority for Tunnels, The Egyptian Society of Engineers and International Tunnelling Association, pp. 61-74.
El-Nahhas, F.; El-Kadi, F.; and Shalaby, A. G. (1991) Subsidence contour maps for a compressed air tunnel. Proc. of the First Geotechnical Engineering Conference, Cairo University, pp. 161-170.
El-Nahhas, F. (1991) Design and construction of self-hardening cut-off wall for new Esna Barrage and Power Project, Egypt. Proc. of Al-Azhar Engineering Second International Conference, Al-Azhar University, Cairo, Vol. 3, pp. 67-81.
El-Nahhas, F. (1991) Nonlinear behaviour of some geotechnical problems. Proc. of Al-Azhar Engineering Second International Conference, Al-Azhar University, Cairo, Vol. 3, pp. 249-263.
Moustafa, A.; El-Nahhas, F.; and Abdel-Tawab, S. (1991) Engineering geology of Mokattam city and vicinity, eastern Greater Cairo, Egypt. Engineering Geology Journal, Elsevier Sci. Pub., Vol. 31, pp. 327-344.
El-Nahhas, F.; El-Kadi, F.; and Shalaby, A. G. (1991) Field measurements during construction of a compressed air tunnel in Cairo. Journal of Tunneling and Underground Space Technology, Pergamon Press, Vol. 6, No. 1, pp. 123-127.
El-Nahhas, F.; El-Kadi, F.; and Ahmed, A. (1992) Interaction of tunnel linings and soft ground. Journal of Tunneling and Underground Space Technology, Pergamon Press, Vol. 7, No. 1, pp. 33-43. Also in Proc. of Int. Symposium on Current Experiences in Tunnelling, National Authority for Tunnels and the International Tunnelling Association, Cairo, 1991, pp. 253-272.
El-Nahhas, F. (1992) Construction monitoring of urban tunnels and subway stations. Journal of Tunneling and Underground Space Technology, Pergamon Press, Vol. 7, No. 4, pp. 425-439.
El-Nahhas, F.; El-Kadi, F.; Khafagy, A.; and Mazen, H. (1992) Settlement of piled-raft foundation of a tall building. Proc. of Int. Colloquium on Structural Engineering - Ain Shams Univ., Egyptian Society of Engineers and Canadian Society of Civil Eng., Vol. 1, pp. 181-193.
El-Nahhas, F. and Ahmed, A. (1992) Deformation and strength characteristics of rock formations in Mokattam area. Proc. of Int. Colloquium on Structural Engineering-Ain Shams Univ., Egyptian Society of Engineers, and Canadian Society of Civil Eng., Vol. 2, pp. 561-571.
El-Nahhas, F. (1993) Tunnelling under Cairo using bentonite slurry machines. Proc. of Int. Congress on Options for Tunnelling 1993. ITA. Amsterdam. pp. 351-361.
Sherif, M.; El-Nahhas, F.; and Yassin, R. (1993) Model tests on shallow foundations resting on soil containing a cavity. Proc. of Al-Azhar Engineering Third Int. Conference, Cairo, pp. 231-241.
El-Nahhas, F.; Ahmed, A.; and Awad, G. (1993) Time-dependent deformation analysis of earth embankments. Proc. of Al-Azhar Engineering Third Int. Conference, Cairo, pp. 321-334.
El-Nahhas, F. (1994) Some geotechnical aspects of shield tunnelling in the Cairo area. Proc. of Int. Congress on Tunnelling and Ground Conditions. ITA, Cairo, Published by Balkema, Netherlands, pp. 11-16.
El-Nahhas, F.; Ahmed, A.; El-Gammal, A.; and Abdel-Rahman, A. (1994) Modelling of braced excavation for subway stations. Proc. of Int. Congress on Tunnelling and Ground Conditions. ITA, Cairo, Published by Balkema, Netherlands, pp. 105-111.
Hassan, A. and El-Nahhas, F. (1994) Assessment of hydraulic efficiency of grouted plug between diaphragm walls. Proc. of Int. Congress on Tunnelling and Ground Conditions. ITA, Cairo, Published by Balkema, Netherlands, pp. 327-331.
Hosny, A. and El-Nahhas, F. (1994) Role of geotechnical monitoring in quality management of tunnelling projects. Proc. of Int. Congress on Tunnelling and Ground Conditions, ITA, Cairo, Published by Balkema, Netherlands, pp. 584-591.
El-Nahhas, F. and Ali, H. (1995) Deformation of self-hardening cutoff during construction of the New Esna Barrage, Egypt. Proc. of Eleventh African Regional Conference on Soil Mech. and Foundation Engineering, Cairo, Vol. 2, pp. 42-54.
El-Nahhas, F.; Ahmed, A.; and Esmail, K. (1996) Ground displacements around multiple tunnels constructed using closed face machines. Proc. of Seventh Int. Colloquium on Structural and Geotechnical Eng., Ain Shams Univ., Cairo, Vol. 1, pp. 213-227.
El-Nahhas, F.; Ahmed, A.; and Esmail, K. (1997) Prediction of ground subsidence above tunnels in Cairo. Proc. of Fourteenth Int. Conf. on Soil Mechanics and Foundation Eng., Hamburg, Vol. 3, pp. 1453-1456.DOI: 10.13140/RG.2.1.4458.1203 (http://issmge.org/uploads/publications/1/31/1997_03_0015.pdf)
El-Nahhas, F.; El-Sakhawy, R.; and Mohammed, E. (1997) Pressure on unyielding retaining wall provided with shelf. Proc. of Al-Azhar Engineering Fourth International Conference, Cairo, Vol. 4, pp. 53- 62.
Samieh, A. and El-Nahhas, F. (1997) Geotechnical response of earth embankment constructed on clayey foundation during construction. Proc. of Al-Azhar Engineering Fourth International Conference, Cairo, Vol. 4, pp. 307- 319.
Morsy, M.; El-Nahhas, F.; and Iskander, G. (1997) An effective stress model for analyzing an embankment, case history. Proc. of Third Alexandria Conference on Structural and Geotechnical Engineering, Alexandria University, Egypt, pp. 325-334.
El-Nahhas, F.; Sherif, M.; and Yassin, R. (1998) Assessment of continuous foundations constructed on ground containing cavities, Proc. of the Arab Conference on Repair and Rehabilitation of Structures, Arab League, Cairo, Egypt, Vol. 1, pp. 387-410.
Abdrabbo, F.; Abdel-Lateef, H.; and El-Nahhas, F. (1998) Effect of tunnelling on adjacent structures. Proc. of the Int. Cong. of Int. Association for Engineering Geology and the Environment, Vancouver, Canada, pp. 3769-3774.
El-Nahhas, F.; Ahmed, A.; and Assaf, O. (1998) Analysis of in-situ walls interaction with the ground. Proc. of Eighth Int. Colloquium on Structural and Geotechnical Eng., Ain Shams Univ., Cairo, Vol. 3, pp. 211-220.
El-Nahhas, F.; Awad, T.; and Abdel-Moatty, N. (1998) Prediction of ground heave due to swelling of multi-layered soil deposits. Proc. of Eighth Int. Colloquium on Structural and Geotechnical Eng., Ain Shams Univ., Cairo, Vol. 3, pp. 398-409.
Abdrabbo, F.; El-Nahhas, F.; and Abdel-Lateef, H. (1999) Field measurements during construction of sewage tunnel. Proc. of the Third National Conference of the Geo-Institute of ASCE.
El-Nahhas, F.; Abel-Rahman, M.; and Hassaneen, A. (1999) A case study of lowering groundwater table at Elkobba palace, Cairo. Proc. of the Second Int. Conference on Groundwater Level Control in Urbanized Areas, Mansoura University, Egypt.
Mossaad, M.; Cutler, J.; Ghoneim, H.; Senay, Y.; and El-Nahhas, F. (1999) Implementation of a geotechnical monitoring program in a pilot drainage project in Kuwait. Proc. of the Second Int. Conference on Groundwater Level Control in Urbanized Areas, Mansoura University, Egypt. DOI: 10.13140/RG.2.1.3671.6888
El-Nahhas, F. (1999) Soft ground tunnelling in Egypt: geotechnical challenges and expectations. Journal of Tunnelling and Underground Space Technology, Pergamon Press, Vol. 14, No. 3, pp. 245-256.
El-Nahhas, F.; Jefferis, S.; Abdullah, W.; and El-Shinnawy, A. (1999) One-dimensional leaching-settlement experiments on undisturbed samples of soils from Kuwait. Proc. of the 52nd Canadian Geotechnical Conference, Saskatchewan, Canada, pp. 31-38.
Mossaad, M.; El-Nahhas, F.; and Al-Sumait, A. (2000) Drawdown-deformation behaviour in a pilot drainage project in Kuwait. Proc. of the Fourth International Geotechnical Conference, Cairo University, Egypt, pp. 625-649.
El-Nahhas, F.; Hassan, A.; Helmy, H.; and Abdel-Sayed, H. (2000) Geotechnical characteristics of coastal deposits in the Red Sea region. Civil Engineering Research Journal, Al-Azhar University, Cairo, Egypt, Vol. 22, No. 4, pp. 1727-1741.
Abdrabbo, F.; El-Nahhas, F.; and Abdel-Lateef, H. (2001) Construction and monitoring of wastewater tunnel. Proc. of the Regional Conference on Geotechnical Aspects of Underground Construction in Soft Ground, Shanghai, China.
Sadek, A.; El-Nahhas, F.; and El-Shinnawy, A. (2001) Neural network predictive tools for settlement responses due to long-term dewatering activities. Proc. of the Fourth International Conference on Structural and Geotechnical Engineering, Alexandria University, Egypt, pp. 997-1010.
Abdrabbo, F.; El-Nahhas, F.; and Abdel-Lateef, H. (2001) Ground subsidence above wastewater tunnel in Alexandria. Proc. of the Fourth International Conference on Structural and Geotechnical Engineering, Alexandria University, Egypt, pp. 1011-1018.
El-Nahhas, F.; Hassan, A.; Helmy, H.; and Abdel-Sayed, H. (2001) Some geotechnical constrains on the development of Red Sea coastal areas. Proc. of the Ninth Int. Colloquium on Structural and Geotechnical Eng., Ain Shams Univ., Cairo.
El-Nahhas, F. M. and Morsy, M. M. (2002) Comparison of the measured and computed performance of propped diaphragm retaining wall in Egypt. Proc. of the Int. Symposium on Numerical Models in Geomechanics, Rome, Italy, DOI: 10.1201/9781439833797-c86, pp. 579-586.
El-Nahhas, F. M.; Helmy, H. M.; and Abdullah, S. I. (2002) Settlement of the raft foundation of an elevated tank, Proc. of the Third Int. Middle East Regional Conference on Civil Engineering Technology, ASCE-Egypt Section, Cairo.
Abdel-Motaal, M.; El-Nahhas, F.; and Behairy, M. (2003) Mitigation of liquefaction hazards using gravel piles. Proc. of the Tenth Int. Colloquium on Structural and Geotechnical Eng., Ain Shams Univ., Cairo, Vol. 4, Paper No.: GE36.
El-Nahhas, F. (2003) Geotechnical aspects of controlling groundwater levels in urban areas. A Keynote Paper, Proc. of the Tenth Int. Colloquium on Structural and Geotechnical Eng., Ain Shams Univ., Cairo, Vol. 6, KL4.
Abu-Zeid, M. M.; El-Nahhas, F. M.; Dowidar, H. M.; and Hashem, W. A. (2004) Petrography and engineering geology of the foundation bedrocks in El-Obour area, east of Cairo, Egypt. Middle East Journal of Scientific Research, Ain Shams University, Vol. 18, pp. 81-105.
Abdel-Motaal, M.; El-Nahhas, F.; and Wahidy, M. (2004) Seismic water pressure mobilization behind yielding retaining walls. Journal of the Egyptian Geotechnical Society, Vol. 15, Part 1, pp. 103-116.
Hasan, H. A.; El-Nahhas, F. M.; and Belal, A. M. (2005) Application of the convergence-confinement approach to analyze the rock-lining interaction in tunnels (case study: Whitemud-Creek tunnel). Proc. of the Eleventh Int. Colloquium on Structural and Geotechnical Eng., Paper No. E05GE19, Ain Shams Univ., Cairo.
Hasan, H. A.; El-Nahhas, F. M.; and Belal, A. M. (2005) Analysis of rock-lining interaction for circular tunnels using the finite element simulation. Proc. of the Eleventh Int. Colloquium on Structural and Geotechnical Eng., Paper No. E05GE20, Ain Shams Univ., Cairo.
Abdel-Motaal, M.; Khairy, A. T.; and El-Nahhas, F. M. (2006) Effect of tunnel presence on the change of the free field seismic response. Journal of the Egyptian Geotechnical Society, Vol. 17, Part 1, pp. 107-122.
Sadek, A.W.; El-Nahhas, F.; and El-Shinnawy, A. (2006) Neural network predictive tools for settlement responses due to long-term dewatering activities. European Journal of Scientific Research, Volume 14, Issue 2, June, pp. 276-286
El-Nahhas, F. M. (2006) Tunnelling and supported deep excavations in the Greater Cairo. Keynote Paper at the Int. Symposium on Utilization of Underground Space in Urban Areas, ETS & ITA, Sharm El-Sheikh, pp. 27-56.
El-Nahhas, F. M.; Abdel-Rahman, M. T.; and Iskander, G. M. (2006) Utilization of grouting techniques for construction of underground structures in urban areas. Int. Symposium on Utilization of Underground Space in Urban Areas, ETS & ITA, Sharm El-Sheikh, Paper No. 36.
El-Mossalamy, Y. M.; El-Nahhas, F. M. and Essawy, A. S. (2006) Innovative use of piled raft foundation to optimize the design of high-rise buildings. Proc. of the Tenth Arab Structural Engineering Conference, pp. 347-358.
El-Nahhas, F. M.; Abdel-Motaal, M.; and Khairy, A. T. (2006) Engineering safety of tunnels during earthquakes, Workshop on Safety of Tunnels and Underground Structures, Technical Paper No. 4, ITA & Ministry of Transport, Riyadh, KSA.
Helmy, H. M.; El-Nahhas, F.; and Tawfik, M. M (2007) Stabilization of jointed sedimentary rock slopes using anchored wall. Proc. of the Sixth International Conference on Structural and Geotechnical Engineering, Alexandria University, Egypt, pp. 1011-1018.
El-Nahhas, F.; Ali, H. A.; El-Araby, S. M.; and Abdelbary, H. E. (2007) Inverse design of NATM tunnels using neural networks. Proc. of the Twelfth Int. Colloquium on Structural and Geotechnical Eng., Ain Shams Univ., Cairo, Paper No.: GTE045.
El-Nahhas, F.M.; Ali, H. A..; Helmy, H. M.; and El-Kadi. A. F. (2008) Assessment of pile integrity utilizing non-destructive testing of model concrete piles. Journal of the Egyptian Geotechnical Society, Vol. 19, Part 1/2, June, 15 p.
El-Nahhas, F.M.; El-Kateb, T. M. and Ewais, A.M. (2008) Back-analysis of a tunnelling case history: numerical approach. Advances in Transportation Geotechnics – Ellis, Yu, McDowell, Dawson & Thom (eds), Publ. Taylor & Francis Group, London, DOI: 10.1201/9780203885949.ch58, pp. 433-438.
El-Nahhas, F.M. and El-Mossalamy, Y. M. (2008) Prediction of settlement trough induced by tunnels constructed using bentonite slurry TBMs. Journal of the Egyptian Geotechnical Society, Vol. 19, Part 2.
El-Nahhas, F.M.; El-Mossalamy, Y. M.; and Tawfik, M. M. (2009) Assessment of the skin friction of large diameter bored piles in sand. Proc. of Seventeenth Int. Conf. on Soil Mechanics and Geotechnical Engineering, Alexandria, Egypt, 4-9 October, Published by IOS Press, Amsterdam, Netherlands. ISBN 978-1-60750-031-5, Vol. 2, pp. 1173-1176. (http://issmge.org/uploads/publications/1/21/STAL9781607500315-1173.pdf)
El-Nahhas, F.M. and El-Mossalamy, Y. M. (2009) The role of small strain constitutive model for predicting differential settlement above tunnels. Proc. of the Thirteenth Int. Colloquium on Structural and Geotechnical Eng., Ain Shams Univ., Cairo, Paper No.: GTE014, DOI: 10.13140/2.1.4956.0968 .
El-Nahhas, F.M.; Sanad, A. M.; and Kassem, M. M (2010) Finite difference modeling of groundwater control in urban environment: Case Study. Proc. of the ASCE Sixth Int. Engineering & Construction Conference IECC’6, Cairo, Egypt, Vol. 1, pp. 511-518.
Hassan, H. A.; Belal, A. M.; Kamal, I. M.; and El-Nahhas, F.M, (2010) Field and numerical study of the effect of geotechnical condition on wave propagation of underground explosion in rock mass. Proc. of the ASCE Sixth Int. Engineering & Construction Conference IECC’6, Cairo, Egypt, Vol. 2, pp. 1029-1043.
Abd Elatty, A. S.; El-Nahhas, F. M.; El-Mossallamy, Y. M.; and El-Baz, A. M. (2012)Experimental and analytical investigation of the effect of groundwater flow on the thermal characteristics of soil. Proc. of the International Engineering Conference on Design and Innovation in Infrastructure, Zaytoonah University, Amman, Jordan, Paper D1, 21p.
Abd Elatty, A. S.; El-Nahhas, F. M.; El-Mossallamy, Y. M.; and El-Baz, A. M. (2012)Effect of surrounding soil thermal conductivity on the effective pipe-to-borehole thermal resistance in vertical ground heat exchangers. Proc. of the International Engineering Conference on Design and Innovation in Infrastructure, Zaytoonah University, Amman, Jordan, Paper D5, 27p.
Abdel-Rahman, A. H.; El-Nahhas, F.M.; El-Mossalamy, Y. M.; and Ibrahim, M. A. (2013) Cyclic versus monotonic loading of reinforced earth walls. Journal of the Egyptian Geotechnical Society, Vol. 19, Part 1, pp. 232-251.
El-Nahhas, F. M. (2013) Tunnelling and underground structures in Egypt: Past, Present and Future. Proc. of the Arabian Tunnelling Conference, Dubai, United Arab Emirates, pp. 348-357.
El-Mossalamy, Y. M.; El-Nahhas, F.M.; and Al Deab, M.M. (2013) Three-dimensional modelling of a piled raft foundation in calcareous cemented sand in Kuwait. Journal of the Egyptian Geotechnical Society, Accepted for publication.
Abdel-Rahman, A.H.; El-Nahhas, F. M.; El-Mossallamy, Y. M.; and Sayed, M.A. (2014) Pullout and displacements of Geogrid reinforcement embedded in sands during earthquakes. Proc. of the International Workshop on Advanced Composites for Engineering Applications - Sustainable Structures and Smart Materials, German University in Cairo (GUC) New Cairo, Egypt.
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Abdel-Motaal, M. A.; El-Nahhas, F.M.; and Khiry, A. T. (2014) Mutual seismic interaction between tunnels and the surrounding granular soil. HBRC Journal, Housing and Building National Research Center, Vol. 10, pp. 265-278 http://dx.doi.org/10.1016/j.hbrcj.2013.12.006
El-Mossalamy, Y. M.; El-Nahhas, F.M.; and Al-Deab, M. M. (2015) Piled raft foundation in calcareous cemented sand in Kuwait City. Proc. of the Fourteenth Int. Conference on Structural and Geotechnical Eng. (ICSGE 14), Ain Shams Univ., Cairo, Session 3, Paper No: 5.
El-Nahhas, F.M.; El-Mossalamy, Y. M.; and El-Shamy, A. A.(2015) 3D Analysis of ground settlement induced by mechanized tunnelling. the Fourteenth Int. Conference on Structural and Geotechnical Eng. (ICSGE 14), Ain Shams Univ., Cairo, Session 11, Paper No: 3.
Elsamni, T.; Kamal, R.; Iida, H.; Otsuka, T. and El-Nahhas, F.M. (2015) Practice of maintenance works for Ahmed Hamdi Tunnel under sever condition of saline water. Proc. of the Fourteenth Int. Conference on Structural and Geotechnical Eng. (ICSGE 14), Ain Shams Univ., Cairo, Session 11, Paper No: 5.
Elshanawany, A. M.; Mansour, M. F.; and El-Nahhas, F. M. (2016) Numerical Modelling of the time-dependent behavior of tunnels in clays – Case Study. Proc. of the Ninth Alexandria International Conference on Structural and Geotechnical Engineering, Alexandria University, Egypt, Paper GT15, 10 p.
Hamed, O. M.; Mansour, M. F.; Abdel-Rahman, A. H.; and El-Nahhas, F. M. (2017) Investigating the behavior of an existing quay wall using the characteristic parameters of Port-Said Clay, Egypt. World Applied Sciences Journal, Vol. 35, No. 3, pp. 483-499. (DOI: 10.5829/idosi.wasj.2017.483.499)
Hamed, O. M.; Mansour, M. F.; Abdel-Rahman, A. H.; and El-Nahhas, F. M. (2017) Geotechnical characterization of Port-Said Clay. Proceedings of the 19th international Conference on Soil Mechanics and Geotechnical Engineering, Seoul, pp. 2991-2994.
Mansour, M. F.; El-Nahhas, F. M.; and Elshanawany, A. M. (2021) Short and Long-term Behaviours of Bored Tunnels in Port-Said Clay. Geotechnical and Geological Engineering Journal, Springer Nature Switzerland AG., 39 (6), 4563-4580
El-Nahhas, F.M.; El-Mossallamy, Y. M.; and Sheta, M. (2025) Geotechnical Performance of a Supported Deep Excavation without Grouted Plug in Cairo, Egypt. Journal of Engineering Research (JER), Special Issue for International Conference on Advances in Structural and Geotechnical Engineering (ICASGE'25) 14-17 April, Hurghada, Egypt. Session 11, Vol. 9, No. 2.
Publications
- , " Inverse Design of NATM Tunnels By Neural Networks ", 12th International Colloquium on Structural and Geotechnical Engineering, Ain Shams University, Cairo, Egypt., 2007
- Mohamed F. Mansour, Fathalla M. El-Nahhas, Amr M. Elshanawany, " Short and Long-term Behaviours of Bored Tunnels in Port-Said Clay ", Geotechnical and Geological Engineering, 2021
- , " 3D ANALYSIS OF GROUND SETTLEMENT INDUCED BY MECHANIZED TUNNELLING ", , 2015
- , " PILED RAFT FOUNDATION IN CALCAREOUS CEMENTED SAND IN KUWAIT CITY ", , 2015
- , " Mutual seismic interaction between tunnels and the surrounding granular soil ", HBRC Journal, 2014
- , " Tunnelling and Underground Structures in Egypt: Past, Present and Future ", , 2013
- , " Soft ground tunnelling in Egypt: Geotechnical challenges and expectations ", Tunnelling and Underground Space Technology 14 (3), 245-256, 1999
- , " Prediction of ground subsidence above tunnels in Cairo ", , 1997
- , " Strain field around a tunnel in stiff soil ", , 1981
Research Projects
FUNDED RESEARCH PROJECTS:
1978-1980 Geotechnical In-Situ Performance of an Experimental Tunnel in Edmonton, Canada (Part of the research program for the Ph. D. degree at the University of Alberta). Funding agencies: The National Research Council of Canada, The City of Edmonton, and The University of Alberta, Canada.
1984-1987 Geotechnical In-Situ Performance of the Diaphragm Walls during Construction of the Regional Line of Cairo Metro; Principal Egyptian Investigator. Funding agencies: International Development Research Centre, Canada with in-kind contributions from the Egyptian National Authority for Tunnels, the University of Alberta and the Ain Shams University.
1987-1990 Geotechnical Behaviour of Tunnels in Some Egyptian Soils; (Part of the research program for the Ph. D. degree of Dr. A. G. Shalaby at Ain Shams University); Project Leader. Funding provided by Ain Shams University.
1997-2000 A Pilot Drainage Project for Lowering Groundwater Table under the Kuwait City: Long-term operation, monitoring and assessment of the drainage system at Shamiyah and Kaifan; Project Leader. Project conducted at the Kuwait Institute for Scientific Research and funded by the Kuwaiti Ministry of Electricity and Water.
2004-2006 Stability Assessment of the Southern Cliff of Mokkatum Plateau; Project Manager. Project conducted at the Soil Mechanics and Foundations, Ain Shams University and funded by El-Nasr Company for Construction and Development.
TECHNICAL ADVISORY PANELS:
1. Review and technical approval of repair works of the existing Ahmed Hamdi Highway Tunnel under Suez Canal. Also, supervision of in-situ monitoring system for assessment of new lining during canal deepening & widening (1992-1996 for The Suez Canal Authority).
2. Assessment of the problems encountered during the development of the New City of El-Minia (1993 for the Ministry of New Urban Communities).
3. Geotechnical evaluation of the sand dunes areas around El-Obour City and proposing general guidelines of the foundation recommendations for the new developments in these areas (1994 for the Ministry of New Urban Communities).
4. Investigation of the problems encountered during the construction of El-Salam Syphon under Suez Canal (1997 for the Ministry of Public Works and Irrigation).
5. Conducting studies on the needed rehabilitation engineering works for Saqqara Archaeological Sites: the step pyramid and the southern tomb at Saqqara as well as three main sites at Memphis (Mit Rahina) the capital of ancient Egypt with formal proposals to perform detailed studies and tender documents (2000-2003 for the Ministry of Culture).
6. Assessment of the geological and engineering aspects of the northern cliffs stability of the Mokkatum Plateau, Cairo (2008-2009 for the Cairo Governorate).
7. Final technical review of all conducted studies on the crossing of Line 3 Tunnel of Cairo Metro under the Wastewater Spine Tunnel at Bab Sharia Square, Cairo (2010 for the Ministry of Transport).
8. Dispute Review Board-Mediation Committee on Line 3, Phases 1 and 2 of Cairo Metro (2013-2014 for the Ministry of Transport).