ABSTRACT
Jet grouting is adopted in a variety of geometrical configurations to ensure provisional or final earth retaining and waterproofing functions at the bottom and walls of excavations (e.g. Balossi Restelli et al., 1986; Santoro & Bianco, 1995; Sondermann & Toth, 2001; Miyasaka et al., 1992). The basic solution consists in a continuous impervious barrier formed with assemblies of overlapped columns. Another important requirement is the resistance against buoyancy, usually provided by self weight and/or internal strength of the foundation system. This function can be satisfied by creating massive cemented soil portions (plugs) of overlapped columns.
