Mathematical Analysis of Shadow Effect in Jet Grouting
Publication: Journal of Geotechnical and Geoenvironmental Engineering
Volume 144, Issue 12
Abstract
Jet grouting is a ground improvement technique that involves the injection of binder (with or without air) in soil at high pressure. One aspect of this technique that has not been investigated until now is the risk of failure due to the shadow effect, defined as the interruption of continuity during jetting produced by obstructions, such as boulders. This can represent a very serious problem because boulders do not allow the jet to reach and erode the soil, thus reducing the diameter or preventing the complete formation of the columns. This paper presents a mathematical theoretical discussion considering boulders as spheres. Three conditions possibly causing a failure of the jet-grouted continuous system are identified. A statistical risk analysis related to the probability of an unidentified spherical boulder causing a failure of the watertightness requirement of a jet-grouting wall is assessed. The goal of this research is to provide a tool by which engineers can estimate the risk related to the shadow effect.
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References
Barla, G., and L. Vai 1999. “Indagini geotecniche per la caratterizzazione del sottosuolo di Torino lungo il tracciato del Passante Ferroviario.” [In Italian.] In Proc., 20th Congresso Nazionale di Geotecnica, 335–342. Rome, Italy: Associazione Geotecnica Italiana.
Bergschneider, B. 2002. Zur Reichweite beim Düsenstrahlverfahren im Sand. [In German.] Herzogenrath, Germany: Shaker Verlag.
Botto, G. 1985. “Developments in the techniques of jet-grouting.” In Proc., 12th Ciclo di Conferenze di Geotecnica. Torino, Italy: Associazione Geotecnica Italiana.
Cardu, M., P. Oreste, D. Pettinau, and D. Guidarelli. 2013. “Automatic measurement of drilling parameters to evaluate the mechanical properties of soils.” Am. J. Appl. Sci. 10 (7): 654–663. https://doi.org/10.3844/ajassp.2013.654.663.
Croce, P., and A. Flora. 2000. “Analysis of single-fluid jet grouting.” Geotechnique 50 (6): 739–748. https://doi.org/10.1680/geot.2000.50.6.739.
Croce, P., A. Flora, and G. Modoni. 2014. Jet grouting: Technology, design and control. Boca Raton, FL: CRC Press.
Croce, P., and G. Modoni. 2007. “Design of jet-grouting cut-offs.” Ground Improv. 11 (1): 11–19. https://doi.org/10.1680/grim.2007.11.1.11.
Durgunoglu, T., F. Kulac, S. Ikiz, O. Sevim, and O. Akcakal. 2012. “Offshore jet grouting: A case study.” In Vol. 4 of Proc., ISSMGE-TC211 Int. Symp. on Ground Improvement, 225–234. Brussels, Belgium: Belgian Group of Soil Mechanics and Geotechnique.
Ho, C. E. 2007. “Fluid-soil interaction model for jet grouting.” In Proc., Geo-Denver 2007. Reston, VA: ASCE.
Hornich, W., and H. Geisler. 2008. “BEG Tunnel Fritzens—Druckluftvortrieb mit Unterstützung zweireihiger horizontaler DSV-Schirme.” Geomech. Tunnelling 1 (5): 491–497. https://doi.org/10.1002/geot.200800039.
Kirsch, K., and A. L. Bell. 2012. Ground improvement. Boca Raton, FL: CRC Press.
Lunardi, P. 1997. “Ground improvement by means of jet grouting.” Ground Improv. 1 (2): 65–85. https://doi.org/10.1680/gi.1997.010201.
Martin, J. R., and C. G. Olgun. 2007. “Liquefaction mitigation using jet-grout columns—1999 Kocaeli earthquake case history and numerical modeling.” In Proc., 4th Int. Conf. on Earthquake Geotechnical Engineering. New York: Springer.
Meyers, J., T. Myers, and K. Petrasic. 2003. “Jet grout stabilization of steeply excavated soil slope.” In Proc., 3rd Int. Conf. on Grouting and Ground Treatment. Reston, VA: ASCE.
Miki, G., and W. Nakanishi. 1984. “Technical progress of the jet grouting method and its newest type.” In Proc., Int. Symp. on In Situ Soil and Rock Reinforcement, 195–200. London: International Society for Soil Mechanics and Geotechnical Engineering.
Modoni, G., P. Croce, and A. Flora. 2006. “Theoretical modelling of jet grouting.” Geotechnique 56 (5): 335–347. https://doi.org/10.1680/geot.2006.56.5.335.
Ochmański, M., G. Modoni, and J. Bzówka. 2015. “Prediction of the diameter of jet grouting columns with artificial neural networks.” Soils Found. 55 (2): 425–436. https://doi.org/10.1016/j.sandf.2015.02.016.
Papoulis, A. 1984. Probability, random variables and stochastic processes. 2nd ed. New York: McGraw-Hill.
Parker, E. J., R. J. Jardine, J. R. Standing, and X. Jullian. 1999. “Jet grouting to improve offshore pile capacity: GOPAL project.” In Proc., Offshore Technology Conf. Houston.
Sembenelli Groppo, P., and G. Sembenelli. 1999. “Deep jet-grouted cut-offs in riverine alluvia for Ertan cofferdams.” J. Geotech. Geoenviron. Eng. 125 (2): 142–153. https://doi.org/10.1061/(ASCE)1090-0241(1999)125:2(142).
Spagnoli, G. 2008. “Theoretical evaluations of liquefaction mitigation through jet grouting.” Geotech. News 26 (3): 41–45.
Spagnoli, G. 2013. “A review of the energy balance equations of the jet grouting.” Int. J. Geotech. Eng. 7 (4): 438–442. https://doi.org/10.1179/1938636213Z.00000000042.
Spagnoli, G., C. Bosco, and P. Oreste. 2017. “Theoretical estimation of the drilling rates comparing the Evans and Nishimatsu models in relation to the offshore piles.” J. Waterway Port Coastal Ocean Eng. 143 (2): 06016005. https://doi.org/10.1061/(ASCE)WW.1943-5460.0000365.
Tornaghi, R. 1989. “Trattamento colonnare dei terreni mediante gettiniezione (jet-grouting).” [In Italian.] In Proc., 14th Convegno Nazionale di Geotecnica, 193–203. Rome, Italy: Associazione Geotecnica Italiana.
Tornaghi, R. 1993. “Controlli e bilanci analitici dei trattamenti colonnari mediante jet grouting.” [In Italian.] Ital. Geotech. J. 27 (3): 217–234.
Tornaghi, R., and A. Pettinaroli. 2004. “Design and control criteria of jet grouting treatments.” In Amélioration des sols en place, Paris, edited by A. Dhouib, J. P. Magnan, and P. Mestat, 295–320. Paris: Laboratoire central des ponts et chaussées.
Trunk, U., and F. Winkler. 2013. “Jet grouting in tunnelling.” Geomech. Tunnelling 6 (3): 274–289. https://doi.org/10.1002/geot.201300017.
Wang, Z. F., S. L. Shen, and J. Yang. 2012. “Estimation of the diameter of jet-grouted column based on turbulent kinematic flow theory.” In Proc., 4th Int. Conf. on Grouting and Deep Mixing. Reston, VA: ASCE.
Warner, J. 2004. Practical handbook of grouting: Soil, rock, and structures. Hoboken, NJ: Wiley.
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Published In
Journal of Geotechnical and Geoenvironmental Engineering
Volume 144 • Issue 12 • December 2018
Copyright
©2018 American Society of Civil Engineers.
History
Received: Nov 21, 2017
Accepted: May 27, 2018
Published online: Sep 17, 2018
Published in print: Dec 1, 2018
Discussion open until: Feb 17, 2019
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