An experimental investigation into the performance of polyurethane grouting in soil

P. Hellmeier, E. Soranzo, W. Wu, R. Niederbrucker, A. Pasquetto

In the proceedings of: GEO2011: 64th Canadian Geotechnical Conference, 14th Pan-American Conference on Soil Mechanics and Geotechnical Engineering, 5th Pan-American Conference on Teaching and Learning of Geotechnical Engineering

Session: In Situ Testing

ABSTRACT: This paper presents an experimental study on the performance of a two component polyurethane grout. The grout is injected into the soil with packers and polymerized with volume expansion. The strong expansion of grout causes compression of the surrounding soil near the injection point. The improvement of the mechanical behaviour of soil through grouting is investigated by an extensive testing program, which includes the penetration resistance by dynamic probing, the measurement of density and water content with a nuclear gauge, the static and dynamic plate loading tests. The large scale tests are carried out under clearly defined and reproducible conditions.

RÉSUMÉ: Cet article présente une étude expérimentale sur la performance d'un coulis de polyuréthane en deux composants. Le coulis aide des emballeurs et polymérisés avec l'expansion du volume. La forte expansion de coulis cause la compression du sol près du point d'injection. L'amélioration du comportement mécanique des sols par injection est étudiée par un vaste programme de tests, qui comprend la résistance à la pénétration dynamique par sondage, la mesure de la densité et de la teneur en eau avec une jauge nucléaire, les essais de chargement statiques et dynamiques á la plaque. Les essais à grande échelle sont réalisées dans des conditions clairement définies et reproductibles.

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