Soil Stabilization for Utility Contractor

Soil Stabilization Program for Utility Contractor

Location: Toronto, ON
Sector: Utilities
Category: Cement Grouting

Description

An underground utility contractor encountered loose fill after initial exposure of an open trench excavation. A Hydrovac was used to vacuum excavate the trench daylighting locates when fill began to collapse into the trench from beneath the sidewalk and road.

From the perimeter of the trench, parallel holes were drilled at 3-foot intervals, at alternating depths of 10 feet and 5 feet. 1/2 inch brake lines were driven into the subgrade using a hammer drill, to the correct depth. 60 litres of cement grout were injected into the drilled holes through the brake lines, permeating into the loose fill, binding with the fill to form a cement stabilized base.

Cement grout injection using Multiurethanes Microfine Cement and Superplasticizer, 1/2 inch Brake Lines, four chemical pumps, and a CG Mixer 22E were used to stabilize the backfill along the perimeter of the open trench. The stabilization program eliminated the potential for collapse of the open trench, allowing for the utility contractor to continue the excavation operation without incident.

cement grouting for pipe decommission

Void Filling in Pipe Decommission

Location: North York, ON
Sector: Utilities
Category: Cement Grouting

Description

Following a pipe’s abandonment, a utility contractor discovered a washed out area above the pipe with the potential to collapse in the future and create voids that could lead to a sinkhole. Structural void filling and permanent abandonment works were required.

A bulkhead was designed and installed to successfully fill the pipe and the void using a heavy cement slurry.

Void Filling under Factory Facility

Location: Guelph, ON
Sector: Industrial
Category: Cement Grouting

Description

Multiurethanes’ technical crew supported a cement grouting program required to fill underground voids encountered under a factory facility.

A mix of non-shrink grout and water was pumped into 1 1/2’’ holes drilled into the void until the grout started flowing from the holes. This evidence and the use of a pressure gauge determined that the voids were successfully filled.

cellular grouting for void filling annular space

Cellular Grouting for Void Filling Annular Space

Location: Toronto, ON
Sector: Utilities
Category: Cellular Grouting

Description

Our skilled technicians assisted a utility contractor with a cellular grouting operation to backfill underground casings, as part of the project to upgrade the Toronto’s electrical system. A mix of cement slurry and foaming agent was successfully used to fill the annular space along the pipes in the electrical installation.

cellular grouting infrastructure project

Cellular Grouting for Infrastructure Project

Location: Greater Toronto Area, ON
Sector: Infrastructure
Category: Cellular Grouting

Description

Assisted an infrastructure contractor with a cellular grouting operation to backfill relined culverts along Highway 407. A mix of cement slurry and foam agent was successfully placed using low-pressure grouting techniques to fill the annular space along the pipe.

Diaphragm pumps, static mixer, foam generator pump, chemical grout pumps were part of the equipment used to complete this operation.