Upper House Condominiums
HCM completed the shoring for the eight storey Upper House Condominium project which required a 12m deep excavation for two levels of underground parking. A tied-back shoring system comprised of piles and lagging with caisson wall adjacent to an existing residence was installed.
Typical to developments in Toronto, there were encroachment restrictions on the south side of the site which only allowed for the tiebacks to extend a maximum of 6.2m to the neighbouring property line. To work within the limited space restrictions, RWH Engineering Inc. designed a system utilizing an upper row of double splayed anchors. Post-grouted strand anchors were installed to achieve the required load capacity in the soils. HCM with the supervision of RWH completed a load testing program to determine the optimal number of post-grout cycles required to meet the anchor design. Reducing the post-grout cycles resulted in schedule savings to the project.
Further, the shoring design was ﬁnite element modelled to allow for comparison against the monitoring results and ensure the shoring performed adequately throughout the construction.
HCM and RWH worked together to produce a design-build shoring re-design which was tailored to the speciﬁc requirements of the project and resulted in cost and schedule savings.
Location: Toronto, ON
Customer: SKYGRiD Construction Inc.