Jet Grouting Practice: an Overview

Abstract

Jet grouting is one of the most popular ground improvement techniques due to its applicability in almost all soil types. In this overview, the historical progress of technology development in jet grouting is briefly described, followed by the trace of the development of empirical and theoretical approaches for predicting the achievable diameter of a jet grout column. This paper also introduces a recently developed jet grouting technique called the Twin-Jet method. Twin-Jet method was developed to achieve quick solidification of soft soils by jetting with two types of binders, cement-slurry and sodium silicate (water glass) as an accelerator. This technique is particularly advantageous in horizontal jet grouting applications. Two case histories are presented to demonstrate the performance of Rodin Jet Pile (RJP) method in the soft clayey and sandy soils in Shanghai and the application of the Twin-jet method in sandy soils in South Korea.