The Effect of Pulling and Rotation Speed on the Jet Grout Columns

Authors: İbrahim Hakkı Erkan, Özcan Tan

Abstract:

The performance of jet grout columns was affected by many controlled and uncontrolled parameters. The leading parameters for the controlled ones can be listed as injection pressure, rod pulling speed, rod rotation speed, number of nozzles, nozzle diameter and Water/Cement ratio. And the uncontrolled parameters are soil type, soil structure, soil layering condition, underground water level, the changes in strength parameters and the rheologic properties of cement in time. In this study, the performance of jet grout columns and the effects of pulling speed and rotation speed were investigated experimentally. For this purpose, a laboratory type jet grouting system was designed for the experiments. Through this system, jet grout columns were produced in three different conditions. The results of the study showed that the grout pressure and the lifting speed significantly affect the performance of the jet grouting columns.

Keywords: Jet grout, sandy soils, soil improvement, soilcrete.

Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1130111

References:

[1] Erkan İ., H., Experimental investigation of affecting factors on performance for jet grout columns, PhD thesis, Selcuk University, Graduate School of Natural Sciences, (2014)
[2] Omine K., Yoshida N. and Ochiai H., 1993. “Stress – Strain Behavior of Mixtures with Two Different Elastic Materials”, Fukuoka University Review of Technological Sciences. 51: 83 – 93.
[3] Bauman V., 1984. “Das Soilcrete - Verfahren in der Baupraxis”, Vortrage der Baugrundtagung, Duesseldorf: 49 - 83. DGEG.
[4] Trevi K., 1994. “Columnar Treatment”, Illustrative Report, Cesena.
[5] Omine K., Ochiai H. and Bolton M.D., 1999. “Homogenization Method for Numerical Analysis of Improved Ground with Cement – Treated Soil Columns”, Dry Mix Methods for Deep Soil Stabilization, Bredenberg, Holm & Broms (eds) © Balkema, Rotterdam ISBN 90 5809 108 2.
[6] Wong K.S., Li J.C., Goh. A.T.C., Poh K.B. and Oishie, 1999. ‘’Effect of Jet Grouting on Performance of Deep Excavation in Soft Clay’’, Proceedings of the 5th International Symposium on Field Measurements in Geomechanics- FMGM99, Singapore, 279 - 284.
[7] Wong J.G. and Poh T.Y., 2000. “Effects of Jet Grouting on Adjacent Ground and Structures”, J. Geotechnical and Geoenviromental Engineering, 247 - 256.
[8] Kırsch F. and Sonderman W., 2001. “Ground improvement and its numerical analysis”. Proc. 15th Int. Conf. Soil Mech. Found. Engg., Istanbul 2001, A.A. Balkema, S. 1775 – 1778
[9] Gökalp A. and Düzceer R., (2002). “Ground Improvement by jet grouting technique for foundations of a natural gas combined cycle power plant in Turkey” Ninth International Conference & Exhibition on Piling and Deep Foundations, DFI, October 2002, Nice, France.
[10] Bell K. R., Clemente Jose L.M., Francis B. and Roberto A., 2003. Superjet Grouting Reduces Foundation Settlement for La Rosita Power Plant in Mexicalli, Mexico, New Orleans, pp. 354 - 364, USA.
[11] Özsoy B., Durgunoğlu H. T., 2003. “The Reduction of Liquefaction Effects Using Soil-Concrete Columns of High Shear Modulus”, 5th National Earthquake Engineering Conference, Istanbul.
[12] Bzowka J., 2004. “Computational Model for Jet Grouting Pile - Soil Interaction”, Studia Geotechnica et Mechanica, Vol. XXVI, No. 3 – 4.
[13] Racansky V., Schweiger H.F., Thurner R., 2008. “FE-Analysis of the Behaviour of Buttressed Jet Grouted Retaining Walls” Proc. 12th Int. Conf. Computer Methods and Advances in Geomechanics, 3984 – 3992.
[14] Küsin C.C., 2009. “The Finite Element Numerical Analysis of Improved Soils Using Jet Grout Method”, M.Sc. Dissertation, Çukurova University.
[15] Nikbakhtan B. and Morteza O., 2009, Effect of grout pressure and grout flow on soil physical and mechanical properties in jet grouting operations International Journal of Rock Mechanics &Mining Sciences 46(2009)498–505.
[16] Nikbakhtan B, Ahangari K and Rahmani N, 2010, Estimation of jet grouting parameters in Shahriar dam, Iran, Mining Science and Technology 20 (2010) 0472–0477.