Evaluation of Numerical Modeling of Jet Grouting Design Using in situ Loading Test
Jet grouting (JG) is one of the methods of improving and increasing the strength and bearing of soil in which the high pressure water or grout is injected through the nozzles into the soil. During this process, a part of the soil and grout particles comes out of the drill borehole, and the other part is mixed up with the grout in place, as a result of this process, a mass of modified soil is created. The purpose of this method is to change the soil into a mixture of soil and cement, commonly known as "soil-cement". In this paper, first, the principles of high pressure injection and then the effective parameters in the JG method are described. Then, the tests on the samples taken from the columns formed from the excavation around the soil-cement columns, as well as the static loading test on the created column, are discussed. In the other part of this paper, the soil behavior models for numerical modeling in PLAXIS software are mentioned. The purpose of this paper is to evaluate the results of numerical modeling based on in-situ static loading tests. The results indicate an acceptable agreement between the results of the tests mentioned and the modeling results. Also, modeling with this software as an appropriate option for technical feasibility can be used to soil improvement using JG.
 Nonveiller, E. M., “Grouting in theory and practice,” Elsevior Pub., 1989.
 Moseley, M. P. and Kirsch, K., “Ground improvement (2nd edition.),” In: London: Spon Press in an imprint of Taylor & Francis group, U.K., 1989, ISBN 0415274559, pp. 119-160.
 Croce P., Flora A., Modoni G., “Jet grouting technology, design and control,” London New York: CRC Press, 2014,302.
 Shroff, A. V. and Shah D.L., “Grouting technology in tunneling and dam construction,” A.A.Balkema, Rotterdam, 1999.
 Kutzner, C., “Grouting of rock and soil,” Balkema, Rotterdam, 1996.
 Kazemian, S. and Huat, B. B. K., “Assessment and copparision of grouting and injection methods in Geotechnical Engineering,” European Journal of Scientific Research, 2009, 27(ISSN 1450-216X), pp. 234-247.
 Hayward Baker Inc. Geotechnical Construction, 2004, Www.Haywardbaker.com.
 Poh, T,Y. and Wong I. H. “A field trial of jet grouting in marine clay,” Canadian Geotechnical Journal., 2001, 38(2).
 Stoel, A., “Grouting for pile foundation improvement,” PhD Thesis., University of Delft.
 Nikbakhtan, B. & Ahangari, K., “The control of column diameter and strength in Jet Grouting processes and the influence of ground conditions.” International Journal of Rock Mechanics & Mining Sciences, Volume 47, pp. 685-698.
 Kimpritis, T., “Field study of the influence of various jet grouting parameters on soilcrete unconfined compressive strength and its diameter,”. 2013, MPhil Thesis, Imperial College London, Department of Civil and Environmental Engineering.
 EN 12716, 2001. Execution of special geotechnical works - Jet Grouting.: British Standard BSi.
 Standard Test Method for Piles Under Static Axial Compressive Load, ASTM, Designation: D 1143-81 (Reapproved 1994).