Soil improvement process using jet grouting which provides high grouting material savings

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(11)

EP 2 031 132 A3

(12)	EUROPEAN PATENT APPLICATION

(88)	Date of publication A3:
	15.08.2012 Bulletin 2012/33

(43)	Date of publication A2:
	04.03.2009 Bulletin 2009/10

(21)	Application number: 07150016.9

(22)	Date of filing: 13.12.2007

(27)	Previously filed application: 28.08.2007 IT PR20070066

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International Patent Classification (IPC):

E02D 3/12^(2006.01)

(84)	Designated Contracting States:
	AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC MT NL PL PT RO SE SI SK TR
	Designated Extension States:
	AL BA HR MK RS

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Priority:

28.08.2007 IT PR20070066

(71)	Applicant: TECSOIL S.R.L.
	43015 Noceto (IT)

(72)	Inventor:
	SANELLA, Antonio 43015, Noceto (PR) (IT)

(74)	Representative: Leone, Mario et al
	Ing. Dallaglio S.r.l. Via Mazzini 2 43121 Parma 43121 Parma (IT)

(54)	Soil improvement process using jet grouting which provides high grouting material savings

(57) The invention finds application in the field of soil improvement and particularly relates to the process known in the art as "jet grouting". Particularly, with this process, in suitable soils part of the column volume is formed in a Water-Jet (WJ) step, using 2 soil eroding fluids, air and water, and the rest of the volume is formed using cement grout jacketed in air as a soil eroding fluid to be pumped through the same nozzle in the Grout-Jet (GJ) step; these steps are both carried out in the nozzle descending stage. The slurry created during the WJ step is displaced by the backfill (rich in grouting material) during the GJ step.

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