Jet our high-pressure grouting serves to produce structural elements (jet-grouted elements and/or jet-grouted bodies of soil made of jet-grouted elements) in the soil. These procedures are soil-strengthening techniques in accordance with DIN 4093. The in-situ soil is separated from the soil texture under high pressure and mixed with binder suspensions. Structural elements form after curing.

Regulatory framework

The Technical Building Rule governing the design and execution of structural elements by jet- or high-pressure grouting is DIN EN 12716:2019-03 'Execution of special geotechnical work – Jet grouting; German version EN 12716:2018'. It is referenced in the Technical Building Rules, cf. MVV TB, no. A 1.2.2.7. 

The use of these techniques for ground improvement does not require a construction technique permit.