DESIGN AND CONSTRUCTION OF A THREE-STOREY CONCRETE BUILDING ON LIQUEFIABLE SOILS IN VICTORIA, BC

J. Suzanne Powell, Kevin Sterne

In the proceedings of: GeoQuébec 2015: 68th Canadian Geotechnical Conference & 7th Canadian Permafrost Conference

Session: Foundations II / Fondations II

ABSTRACT: The foreshore in Victoria has undergone a number of changes over the years with large areas of fill having been placed to increase the land surface within much of the foreshore area. One such reclaimed land site was selected for the construction of a new three-storey concrete building. The field investigation consisted of both Becker Penetration tests (BPT) and Standard Penetration Tests (SPT) followed by bedrock probing with an air track percussion rotary drill. The soil conditions generally consist of a variable thickness of gravelly sand to sand and gravel fill material overlying a thick deposit of firm to soft marine clay. The design level earthquake for this structure is the 1:2,475 year event which results in a peak horizontal firm ground acceleration (PGA) of 0.6 g for this site. Estimated liquefaction induced lateral displacements within the fill were up to 6 m and vertical settlement estimates varied from about 0.1 m to 0.3 m. The final design of the building foundations consisted of rock-socketed caissons designed to resist the seismic deformations. Additional challenges included planning and executing a geotechnical investigation within a congested active work site and meeting the environmental requirements for working adjacent to the ocean within contaminated fill.

RÉSUMÉ: changements au cours des années. Avec des grandes sections de remblai ayant été placés pour augmenter la surface de la terre pénétration Becker (BPT) et des essais de pénétration standard (SPT), suivie par un sondage du soubassement par forage rotatif. Les conditions du sol sur ce site consistent généralement en une couche de remblai avec des épaisseurs avec une période de retour de 1 :2475 années. Un événement qui se traduit par une accélération horizontale maximale dans la terre ferme (PGA) de 0.6g pour ce site. Les déplacements latéraux estimés induit par la liquéfaction dans le bâtiment comporte des caissons encastrés en roche pour résister aux déformations sismiques. Les défis additionnels ont satisfaire les exige

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Cite this article:
J. Suzanne Powell; Kevin Sterne (2015) DESIGN AND CONSTRUCTION OF A THREE-STOREY CONCRETE BUILDING ON LIQUEFIABLE SOILS IN VICTORIA, BC in GEO2015. Ottawa, Ontario: Canadian Geotechnical Society.

@article{598,author = J. Suzanne Powell; Kevin Sterne,title = DESIGN AND CONSTRUCTION OF A THREE-STOREY CONCRETE BUILDING ON LIQUEFIABLE SOILS IN VICTORIA, BC,year = 2015}