Abstract
Jet grouting technology represents one of the most important recent developments amongst the in situ soil improvement methods, exploiting the effect of very high speed jets to fracture the soil and mix or partly replace it with a cement grout. Aim of this paper was to compare several specific energy formulas from several authors based in in situ experiences or coming from theoretical evaluations. Only monofluid system, in which the cement grout is injected at pressure typically between 30 and 70 MPa, was considered.
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