HELICAL PULLDOWN ® Micropiles Report A CASE HISTORY Project: Condominium Building Richmond Hill, Ontario The Problem: An 11-story condominium building north of Toronto had been constructed less than 10 years on a dense clay till capping an artesian aquifier. Large open- bottom sumps (installed during the initial construc- tion to control groundwater) had undermined four shear walls, two columns and the parking garage foundation walls on the south

Join for free to read