125
Honour Lectures /
Conférences honorifiques
Proceedings of the 18
th
International Conference on Soil Mechanics and Geotechnical Engineering, Paris 2013
14 CONCLUSIONS
The purpose of this contribution was to show how the use of the
PMT can be expanded further than current practice. In a first
part, it is shown that more soil testing should take place in
geotechnical engineering to reach a reasonable target of
reliability. Then, it is theoretically demonstrated that if the lack
of tensile resistance of soils is taken into account, the true soil
modulus in compression is higher than what is obtained from
conventional PMT data reduction. Then a procedure is
investigated to recreate by hyperbolic extension the small strain
early part of the curve lost by the decompression-recompression
process associated with the preparation of the PMT borehole.
The limitations of that procedure are identified. Best practice for
preparing the PMT borehole, commonly expected values of
PMT parameters, and correlations with other soil parameters are
given. Reasoning is presented against the general use of the
PMT unload reload modulus.
It is shown that instead of limiting the use of the PMT test
results to the modulus and the limit pressure, the entire
expansion curve can be used to predict the load settlement
behavior of shallow foundations and the load displacement
curve of deep foundations under horizontal loading. Long term
creep loading and cyclic loading are addressed. A solution is
presented for the design of piles subjected to dynamic vehicle
impact. It is also shown how the PMT can be very useful for the
foundation design of very tall structures. Finally an attempt is
made to generate preliminary soil liquefaction curves base on
the normalized PMT limit pressure.
15 ACKNOWLEDGEMENTS
The author wishes to thank the following individual for
contributing to this paper: Roger Failmezger and Art Stephens
for sharing some PMT data in sand, Ken Tand for sharing some
plate load test data in stiff clay, Harry Poulos for providing
some information on the Burj Khalifa measurements, Chris
Haberfield for providing some information on the Nakheel
Tower design, Clyde Baker for providing some information on
his experience with the PMT and highrise foundation design.
Several of my PhD students at Texas A&M University also
contributed to this paper by making computations, preparing
figures, formatting the manuscript, and more importantly
discussing various aspects of the new contributions in this
paper. They are: Alireza Mirdamadi, Ghassan Akrouch, Inwoo
Jung, Seokhyung Lee.
16 REFERENCES
1. Baguelin F., Jezequel J.-F., Shields D.H., 1978, “The
Pressuremeter and Foundation Engineering”, Trans Tech
Publications, Clausthal-Zellerfeld, W. Germany, 1978.
2. Baker C.N. Jr., 2010, “Uncertain Geotechnical Truth and
Cost Effective High-Rise Foundation Design”, 2009
Terzaghi Lecture, in Art of Foundation Engineering
Practice, Edited by Mohamad H. Hussein; J. Brian
Anderson; William M. Camp, Geotechnical Special
Publications (GSP) 198, ASCE, Washington, USA.
3. Baker C.N., 2005, “The use of the Menard pressuremeter in
innovative foundation design from Chicago to Kuala
Lumpur”, the 2nd Menard Lecture, Proceedings of the 5th
Int. Symp. on the Pressuremeter – ISP5, Paris, France,
Presses de l’ENPC.
4. Baud J.-P., Gambin M., Schlosser F., 2013, “Courbes
hyperboliques contrainte–déformation au pressiomètre
Ménard autoforé”, Proceedings of the 18th International
Conference on Soil Mechanics and Geotechnical
Engineering, Paris 2013, Presses des Ponts et Chaussees,
Paris, France.
5. Briaud J.-L., 1985, “ Pressuremeter tests at Amoco
refinery”, consulting report to K.E. Tand and Associates,
Houston, Texas.
6. Briaud J.-L., 1992, “The Pressuremeter”, Taylor and
Francis, London, pp.422.
7. Briaud J.-L., 1997, “SALLOP: Simple Approach for Lateral
Loads on Piles”, Journal of Geotechnical and
Geoenvironmental Engineering, Vol. 123, No.10, ASCE,
Washington, USA.
8. Briaud J.-L., 2007, “Spread Footings in Sand: Load
Settlement Curve Approach”, Journal of Geotechnical and
Geoenvironmental Engineering, Vol 133, Issue 8, August
2007, ASCE, Reston, Virginia, USA.
9. Briaud J.-L., 2013, “Geotechnical Engineering: unsaturated
and saturated soils”, John Wiley and Sons, New York,
pp.848.
10. Briaud J.-L., Gibbens R., 1999, “Behavior of Five Spread
Footings in Sand,” Journal of Geotechnical and
Geoenvironmental Engineering, Vol. 125, No.9, pp. 787-
797, September 1999, ASCE, Reston, Virginia.
11. Briaud J.-L., Kim N.K., 1998, “Beam Column Method for
Tieback
Walls”,
Journal
of
Geotechnical and
Geoenvironmental Engineering, Vol. 124, No. 1, ASCE,
Washington, DC.
12. Briaud J.-L., Makarim C.A., Little R., Tucker L., 1985,
“Development of a pressuremeter method for predicting the
behavior of single piles in clay subjected to cyclic lateral
loading”, Research Report RF5112 to Marathon Oil
Company, McClelland Engineers, Raymond International
Builders, Shell Development Company, Dpt of Civil
Engineering, Texas A&M University, College Station,
Texas, USA, pp214.
13. Brown D.A., Reese L.C., 1985, “Behavior of a large scale
pile group subjected to cyclic lateral loading”, Report to
MMS, FHWA, and USAE-WES, Geotechnical Engineering
Center Report GR85-12, Bureau of Engineering Research,
Austin, Texas, USA.
14. Cox W.R., Dixon D.A., Murphy B.S., 1983, “Lateral load
tests on 25.4 mm diameter piles in very soft clay in side by
side and in line groups”, ASTM Special Technical
Publication no. STP 835, pp 122-140.
15. Duncan, J.M., and Chang, C.Y. (1970) “Non-linear analysis
of stress and strain in soils,” J. Soil Mech. Founds Div.,
ASCE, 96(SM5) 1629-1653.
16. Fascicule 62, 1993, “Regles techniques de conception et de
calcul des foundations des ouvrages de genie civil”,
Ministere de l’equipement, du logement, et des transports,
Publications Eyrolles, Paris, pp182.
17. Haberfield C.M., Paul D.R., 2010, “Footing design of the
Nakheel Tower, Dubai, UAE”, Proceedings of the Deep
Foundation Conference, February 2010, Dubai, UAE, Deep
Foundation Institute, 18pp.
18. Hossain, K. M. 1996. “Load settlement curve method for
footings in sand at various depths, under eccentric or
inclined loads, and near slopes.” Ph.D. thesis, Texas A&M
Univ., Dept. of Civil Engineering, College Station, Tx,
USA.
19. Jeanjean, P. 1995. “Load settlement curve method for
spread footings on sand from the pressuremeter test.” Ph.D.
dissertation, Texas A&M Univ., Dept. of Civil Engineering,
College Station, Tx, USA.
20. Lim S.G., 2011, “Development of design guidelines for soil
embedded post systems using wide flange I-beams to
contain truck impact”, PhD dissertation, Zachry Dpt. of
Civil Engineering, Texas A&M University, College Station,
Texas, USA, pp394.
21. Little R.L., Briaud J.-L., 1988, “Full scale cyclic lateral load
tests on six piles in sand”, Miscellaneous paper GL-88-27,
US Army Engineer Waterways Experiment Station (now
ERDC), Vicksburg, MS, USA, pp175.
22. LS-DYNA, 2006, “Theory Manual and User’s Manual
version 971”, Livermore Software Technology Corporation,
Livermore, CA.
23. Mayne, P. W., and G. J. Rix, 1993, “Gmax – qc
Relationships for Clays,” Geotechnical Testing Journal,
ASTM, Vol. 16, No. 1, pp. 54-60.
24. Mirdamadi A., 2013, “Deterministic and probabilistic model
of single pile under lateral impact”, PhD dissertation,
Zachry Dpt. of civil engineering, texas A&M university,
College Station, Texas, USA.
