Advances in the Construction and Design of Jet Grouting Methods in South America

This paper presents a brief historical development of the two most popular jet grouting methods used in South America, namely, the chemical churning pile method (CCP) and jumbo jet grouting. Advantages and limitations of each procedure are cited. A brief discussion follows covering the history of CCP jet grouting in South America. Field trials performed to improve the design methodology and construction of CCP and jumbo jet grouted columns are presented. Finally, three case histories are presented to illustrate the use of jumbo jet grouting where limited head room exists, jet grouting in close proximity to pile supported structures, formation of a diaphragm wall in gravelly soil with boulders. The paper closes with a short discussion of a recent tunnel project in which horizontal jet grouting is used as the temporary tunnel support