Hot Bitumen Grouting Stops Major Inflow, Philippines
Hot bitumen injection, in conjunction with regular cement based suspension grouts, was employed to stop a major tailings flow, which peaked at approximately 7,000 l/sec (111,000 US GPM).
Soil Grouting Through Sleeve pipes Enables Shaft Sinking in dry conditions, Milwaukee, Wisconsin
Piping below large primary clarifiers was replaced by sinking shafts in silty soils below the water table. No dewatering was allowed. A multiple pass soil grouting program created a stable, low permeability conglomerate through which the shafts were excavated.
Cement Foam Backfill
Regular cement based suspension grout used for mine backfilling operations have low cohesion values and migrate downwards through the shotrock for the duration of a backfilling operation.
Dorchester Road Sewer Rehabilitation, Niagara Falls, Ontario
Man accessible, leaking concrete sewer joints, located below the water table beneath a roadway triggered an internal soil erosion process resulting in the formation of major sinkholes that posed danger to local traffic. An immediate remedy was necessary to restore safety to the public and provide extended life to the sewer system
Seepage Control for the Detroit Windsor Car Tunnel, Windsor, Ontario and Detroit, Michigan, USA
The underwater portion of the Detroit River Car Tunnel was continually plagued by water infiltration problems, causing extensive damage and deterioration to the structure. The multi-year restoration program, resulted in the near elimination of the infiltration, entailing multiple injection phases.
Structural Repair to CP’s Intermodal Terminal using Grouting Techniques, Vaughan, Ontario
Two 660 meter long concrete strip footings support three large gantry cranes at the CP Vaughn Intermodal Terminal. The existing steel bearing plates between the footings and crane rail created a point-loading situation leading to rapid extensive cracking, deterioration and settlement.