Jet grouting: snail's pace of adoption : Andromalos, K B; Pettit, P J Civ Engng, N YV56, N12, Dec 1986, P40–43

Abstract

Jet grouting, a remarkable method of improving soils that has been used overseas for the past 15 years, is described. It is applicable to modifying relatively soft soils to achieve general ground improvement, or to construct subgrade structural or loadbearing members without prior excavation. Its chief uses include underpinning existing structures threatened by subsidence, providing seepage control, making cofferdams, and, limiting subsidence over tunnel excavation sites. The product used is soilcrete, made by intimate, hydraulic-induced mixing of cement slurry with the native soil. The properties of the soilcrete, the shape of which depends on the brand of equipment, depend on the native soil and the way the process is applied. Of the several techniques available, this article describes the process of greatest commercial importance, a Japanese technique. Various applications of jet grouting are described. The advantages and disadvantages of the method are noted. The more interesting U.S. projects to date are described.