Soil injection

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Soil injections (also called grouting ) are processes in special civil engineering in which the pore space of loose rock and soils as well as cavities in solid rock (cracks, crevices, karst etc.) under structures - and in the subsoil around a structure - are filled. This increases the load-bearing capacity of the subsurface, whereas the conductivity for fluids (water, gas, etc.) is reduced (see also →  Injection seal ). The injection media used for this are usually liquids or suspensions (solid suspensions , microemulsions, foams, gels and resins) and have the property of being sufficiently liquid for easy penetration during processing and of solidifying and closing in the subsoil after the injection process is complete hardening.

Soil injections are also carried out to underpin existing buildings in neighboring developments. As a rule, a proof of stability must be created for this.

Sizing, processing and controls

Information and notes on this are contained in the corresponding chapters of the current EURONORM EN 12715, "Injections". In addition, the requirements / provisions of EUROCODE EC 1 (wherever applicable) must be observed.

literature

  • R. Widmann (Co-ordinator): International Society of Rock Mechanics Commission on Rock Grouting. International Journal of Rock Mechanics and Mining Sciences & Geomechanics Abstracts. Vol. 33, No. 8, 1996, pp. 803-847, doi: 10.1016 / S0148-9062 (96) 00015-0
  • European Committee for Standardization (CEN): EN 12715: 2000, Execution of special geotechnical work, Grouting. Brussels 2000, ISBN 0-580-34933-0
  • KJ Witt (Hrsg.): Grundbau-Taschenbuch. 7th edition, part 2. Ernst & Sohn, Berlin 2009, ISBN 978-3-433-01845-3 , pp. 159–198
  • K. Kirsch, A. Bell: Ground Improvement . Third edition. CRC Press 2013 ISBN 978-0-415-59921-4 , Chapter 5: Permeation Grouting
  • Hans Oliver Eichiner, Gert Furtmüller, Wolfgang Hornich, Adrian Kainrath, Stefan Leitner, Reinhold Palla, Ignaz Reichl, Manfred Scheikl, Gert Stadler: Expert Comments to EN 12715, Grouting. Austrian Society for Geomechanics, Salzburg 2017 ( PDF 9.2 MB)