This process erodes the soil with an air shrouded water jet of min. 100 m/sec exit velocity. Grout is injected simultaneously through an additional nozzle located below the water jet nozzle. The grout pump pressure ranges above 15 bar. A variation of this process operates without air shrouding of the water jet. The T process is used for underpinning works, cut off walls and sealing slabs and is mainly used for the treatment of cohesive soils.
Please see the second photo from the site of XL-50 Full hydraulic Crawler Jet Grouting Anchor Drilling Rig for Triple separation process.
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