This work describes the scientific process that transformed the pioneering empirical solution of jet grouting into an engineering technique. In its basic version, jet grouting involves drilling small holes in the ground and emitting jets of cement grout at very high speed while extracting and rotating the drill rods, to cut the soil, mix it with the binder and form cemented columns. The dimensions and mechanical properties of the columns depend on the ability of the jet to disintegrate the original soil fabric, mix particles and mortar homogeneously, and carry out the cement reaction. In this process the hydrodynamics of submerged turbulent jets play a fundamental role. Observation and theory intertwine to analyze, conceptualize, and simulate basic mechanisms. The result is a closed-form relationship, simple but complete, capable of capturing the role of the fundamental factors. Aim of this process is to reduce the subjectivity and uncertainties inherent in the applications and pave the way for the improvement of the technique. Finally, a practical application is reported to show the potential of the scientific approach on improving the technique.