Specialty grouting techniques: Technical considerations and applications in Canada

Naresh Gurpersaud, Daniel Lees, Zhong Han

In the proceedings of: GeoSt. John's 2019: 72nd Canadian Geotechnical Conference

Session: Dams and Embankments

ABSTRACT: Challenging geotechnical conditions are commonly encountered during construction activities due to the highly variable nature of soils and rocks. Excessive water inflows or variability in soils or rocks can result in numerous challenges during the construction of dams, tunnels, shafts, cut-off walls, structures, etc. Specialty grouting strengthens target areas in the ground and controls groundwater flow through rocks and soils by reducing their permeability. Most grouting applications can be performed in situ and targeting areas where treatment is required. The degree of improvement can be evaluated by real-time quality control and this type of work is performed by highly skilled and experienced personnel. Speciality grouting can be tailored to suit the actual conditions encountered during the execution of the work. The desired strength and/or permeability can be achieved by using stringent quality control measures. An overview, including technical considerations and case histories of a few speciality grouting applications such as jet, compaction, rock fissure and permeation grouting are outlined in this paper.

RÉSUMÉ: Des conditions géotechniques difficiles sont fréquemment rencontrées lors des travaux de construction en raison de la nature très variable des sols et des roches. Les apports excessifs dLe jointage spécialisé renforce les zones cibles dans le sol et contrôle le flusols en réduisant leur perméabilité. La plupart des applications de jointement peuvent être exécutées in situ et cibler des le contrôle de qualité en temps réel et ce type de travail est effectué par du personnel hautement qualifié et expérimenté. Le jointage de spécialité peut être rméabilité souhaitées peuvent être obtenues en utilisant des mesures rigoureuses de contrôle de la qualité. Un aperçu, des considérations techniques et des antécédents de cas impliquant quelques applications de jointage de spécialité telles que le jet, le compactage, la fissure rocheuse et le jointage de perméation sont décrits dans cet article.

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