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  1. Dr Andrew McNamara
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Contact Information

Contact

Visit Dr Andrew McNamara

CG08, Tait Building

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Postal Address

City, University of London
Northampton Square
London
EC1V 0HB
United Kingdom

About

Background

Andrew McNamara was employed in the civil engineering industry for more than twenty years gaining considerable experience in construction processes associated with deep excavations before undertaking PhD research that involved a major study into the influence of new techniques used to reduce ground movements around deep excavations. Upon completion of his PhD he was awarded a post doctoral research fellowship at the Geotechnical Engineering Research Centre to enable him to develop and implement construction process related centrifuge research led by industry. In this role he initiated a number of major projects and was appointed as a Senior Lecturer in 2004.

He was a member of the winning team for the Fleming Award in 2004, awarded for excellence in geotechnical design and construction in recognition of work on the Moorhouse draught relief shaft for Crossrail. In 2005 he was awarded a Diploma of the Henry Adams Award, jointly with Professor RN Taylor, by the Institution of Structural Engineers for a paper on his doctoral work and also a Telford Prize, jointly with Dr PRJ Morrison and Dr TOL Roberts by the Institution of Civil Engineers for a paper on the design and construction of a deep shaft for Crossrail.

He is currently a co-opted member of the British Geotechnical Association Executive Committee and invited member of the ISSMGE technical committee TC2 for Physical Modelling in Geotechnics.

Qualifications

PhD Civil Engineering, City University London, 2001
MSc Geotechnical Engineering, City University London, 1998
BEng (Hons) Civil Engineering, Kingston University, 1995

Employment

2004 - to date City University London, Senior Lecturer
2001 - 2004 City University London, Postdoctoral Research Fellow
1998 - 2001 City University London, EPSRC Research Student
1990 - to date Skanska UK Building, Principal Geotechnical Engineer
1987 - 1990 Fairclough Building Ltd, Design Engineer
1984 - 1987 Ward & Partners, Draughtsman
1980 - 1984 Pell Frischmann & Partners, Draughtsman

Oher appointments

2008 - to date University of London, Visiting Lecturer
2008 - 2012 University of the West of Scotland, External Examiner
2006 - to date RKD Consultant Ltd, Consultant
2009 - to date STEM Ambassador

Areas of expertise

Control of ground movements around deep excavations, geotechnical issues related to construction processes, physical modelling (with special emphasis on centrifuge modelling of deep excavations and deep foundations).

Research

Research interests

- Use of enhanced base stiffness to control ground movements around deep excavations.
- The effectiveness of mass concrete thrust blocks as lateral support for excavations.
- Load bearing capacity of novel pile groups
- High capacity friction piles

Research Students

Name
Rohit Gorasia
Thesis Title
BEHAVIOUR OF RIBBED PILES IN CLAY
Name
Leonora Begaj
Thesis Title
GEOTECHNICAL CENTRIFUGE MODEL TESTING FOR PILE FOUNDATION RE-USE
Further Information
In recent years development is at premium in many European cities. With life cycles of 25-30 years of buildings in financial cities and about 40 years in regional centres the ground is becoming more and more congested with redundant foundations. As the underground development of services and infrastructure already confines the location of building foundations, redundant foundations only add to this problem.
The research described in this thesis, using centrifuge model testing, describes how the existing pile foundations in overconsolidated clay are likely to behave when their loading conditions are changed by unloading caused by demolition and subsequent reloading. This is done with the view to re-use the existing pile foundations for the new redevelopments. The influence of the new foundations on the existing foundations is also described. By re-using the foundations, the use of raw materials is reduced, the energy consumption for construction is reduced, the volume of soil from foundation construction is eliminated and the construction time significantly reduced, consequently reducing the whole costing of a structure.
Experimental data was obtained from series of twenty one centrifuge model tests
undertaken at 60g. The geometry of the model was such that it was possible to test two sets of foundations with each test. The performance of piles in overconsolidated clay when subjected to load/unload/reload cycles and the influence of supplementary piles used to achieve the required capacity were investigated. The model tests include comparison of the behaviour of bored piles when supplemented with mini piles of different length, number and spacing (centre to centre distance between the mini piles and the existing centre pile).
An increase in capacity was observed when single piles were subjected to load cycles. It was found that this increase in capacity is dependent on the previous loading conditions of the pile. The behaviour of enhanced piles was characterised using a single pile test as datum test. The influence of these novel pile groups on the existing pile was dependent on the number, length of the mini-piles in the group and centre to centre spacing between the existing and new pile foundation.

Publications

Conference Papers and Proceedings (24)

  1. McNamara, A.M., Divall, S., Goodey, R.J., Gorasia, R.J., Halai, H., Rose, A.V., Stallebrass, S.E., Taylor, R.N. and Xu, M. (2012). The London Geotechnical Centrifuge Centre at City University London. 2nd European Conference on Physical Modelling in Geotechnics 23-24 April, Delft University of Technology, Netherlands.
  2. McNamara, A.M., Hijazi, A. and Gorasia, R. (2010). Model tests for reducing installation forces in jacked sheet piling. 7th International Conference on Physical Modelling in Geotechnics (ICPMG) 28 Jun 2010 – 1 Jul 2010, ETH Zurich, Zurich, SWITZERLAND.
  3. Mascarucci, Y., Miliziano, S., McNamara, A.M. and Pasqualetti, M. (2010). Influence of pile tip geometry on soil displacements around driven piles in layered ground. .
  4. McNamara, A.M., Hijazi, A. and Gorasia, R. (2010). Model test analysis for pile foundation re-use. Proc. Int. Conf.on Physical Modelling in Geotechnics, Zurich, Switzerland .
  5. McNamara, A.M., Mascarucci, Y., Miliziano, S. and Pasqualetti, M. (2010). Investigation into the influence of pile tip geometry on soil displacements around jacked-in piles in layered ground. Proc. Int. Conf.on Physical Modelling in Geotechnics, Zurich, Switzerland .
  6. McNamara, A.M., Begaj Qerimi, L. and Fernie, R. (2010). Model test analysis for pile foundation re-use. .
  7. McNamara, A.M., Mascarucci, Y., Miliziano, S. and Pasqaletti, M. (2008). Modellazione in centrifuga dell’installazione del palo soles. Incontro Anunuale dei Ricervatori di Geotecnica 2008 – IARG 2008, Catania .
  8. Taylor, R.N., Yao, J., and McNamara, A.M., (2008). The effects of loaded bored piles on existing tunnels. 6th International Symposium on Geotechnical Aspects of Underground Construction in Soft Ground Shanghai, China.
  9. Stallebrass, S., McNamara, A.M, , Taylor, R.N., and Goodey, R.J., (2007). Modelling geotechnical construction processes for urban developments. Madrid.
  10. Stallebrass, S., Taylor, R.N., and McNamara, A.M., (2007). Proactive design of buried mass concrete thrust blocks: model studies – Panel contribution. Madrid.
  11. Goodey, R.J., McNamara, A.M. and Taylor, R.N. (2006). The influence of piles as a ground movement control device during deep basement construction. .
  12. Taylor, R.N., Cabrera, M, and McNamara, A.M, (2006). Inclined load capacity of buried mass concrete thrust blocks. Hong Kong.
  13. Taylor, R.N., Bilotta, E, , Bitetti, B, and McNamara, A.M, (2006). Micropiles to reduce ground movements induced by tunnelling. Hong Kong.
  14. Taylor, R.N., Cabrera, M, and McNamara, A.M, (2006). Inclined load capacity of buried mass concrete thrust blocks. Hong Kong.
  15. Taylor, R.N., Qerimi, L.B., and McNamara, A.M, (2006). Preliminary model tests on re-use of pile foundations. Hong Kong.
  16. Taylor, R.N., Goodey, R.J., and McNamara, A.M., (2006). The influence of piles as a ground movement control device during deep basement construction. Hong Kong.
  17. Taylor, R.N., Yao, J., and McNamara, A.M., (2006). The effects of bored pile construction on existing tunnels. Hong Kong.
  18. Goodey, R.J., McNamara, A.M. and Taylor, R.N. (2005). The effectiveness of buried mass concrete thrust blocks as a means of lateral support for excavations. Osaka, Japan.
  19. McNamara, A.M., Taylor, R.N., Stallebrass, S.E. and Romano, M.C. (2003). Influence of tunnelling on the behaviour of existing piled foundations. .
  20. McNamara, A.M., Taylor, R.N., Stallebrass, S.E. and Romano, M.C. (2003). Influence of tunnelling on the behaviour of existing piled foundations. .
  21. Stallebrass, S., McNamara, A.M, and Taylor R N, (2003). Evalation of numerical analyses used to model the influence of heave reducing piles on excavation induced ground movements. Prague.
  22. Stallebrass, S., McNamara, A.M, , Romano, M.C., and Taylor, R.N, (2003). Influence of tunnelling on the behaviour of existing piled foundations. Dundee.
  23. Taylor, R.N. and McNamara, A.M., (2002). Use of heave reducing piles to control ground movement around deep excavations. 3rd International Symposium on Geotechnical Aspects of Underground Construction in Soft Ground Toulouse, France.
  24. Taylor, R.N. and McNamara, A.M. (2002). Use of heave reducing piles to control ground movement around excavations. St John’s Canada.

Journal Articles (8)

  1. Gorasia, R.J. and McNamara, A.M. (2016). High-capacity ribbed pile foundations. Proceedings of the Institution of Civil Engineers: Geotechnical Engineering, 169(3), pp. 264–275. doi:10.1680/jgeen.15.00073.
  2. McNamara, A.M., Suckling, T.P., McKinley, B. and Stallebrass, S.E. (2013). A field trial of a reusable, hollow, cast-in-situ pile. Proceedings of the Institution of Civil Engineers: Geotechnical Engineering . doi:10.1680/geng.12.00102.
  3. Gorasia, R.J., McNamara, A.M. and Rettura, D. (2012). Reducing driving forces for pressed in piles. Proceedings of the Institution of Civil Engineers. Geotechnical Engineering .
  4. McNamara, A.M. and Begaj, L. (2011). Centrifuge model testing for pile foundation re-use. International Journal of Physical Modelling in Geotechnics, 11(4), pp. 166–177.
  5. McNamara, A.M, , Goodey, R.J. and Taylor, R.N. (2009). Apparatus for centrifuge modelling of top down basement construction with heave reducing piles. International Journal of Physical Modelling in Geotechnics, 9(1), pp. 1–14.
  6. McNamara, A.M., Roberts, T.O.L., Morrison, P.R.J. and Holmes, G. (2008). Construction of a deep shaft for Crossrail. Geotechnical Engineering, 161(GE6), pp. 299–399.
  7. Morrison, P.R.J., McNamara, A.M. and Roberts, T.O.L. (2004). Design and construction of a deep shaft for Crossrail. PROCEEDINGS OF THE INSTITUTION OF CIVIL ENGINEERS-GEOTECHNICAL ENGINEERING, 157(4), pp. 173–182.
  8. McNamara, A.M., and Taylor, R.N. (2004). The influence of enhanced excavation base stiffness on prop loads and ground movements during basement construction. The Structural Engineer – Int. Jour. IstructE, 82(4), pp. 30–36.

Patent

  1. McNamara, A.M., Stallebrass, S.E. and Taylor, R.N. (2007). A pile and method of constructing a pile. Patent no. WO2008047151 A1

Other Activities

Editorial Activity

  1. Member of editorial advisory board of Ground Engineering.

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City, University of London

Northampton Square

London EC1V 0HB

United Kingdom

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