Chemical Grouting to Stop Water Seepage into Utility Chamber

Location: Guelph, ON
Sector: Utilities
Category: Chemical Grouting

Description

Due to the high water table present in the region, an underground water main chamber encountered an unavoidable inflow of water through the precast segment joints.

Working within the chamber, a series of parallel holes were drilled directly into the joints voids at a depth of 4 inches between the precast segments. Packers were installed into the drilled holes and flushed with Water/Acid solution to rid debris from holes and the voids. Chemical grout was then injected into the joints, filling the void and creating a semi-rigid foam barrier.

Chemical grout injection using Multiurethanes Universal Resin, Universal Accelerator, 3/8″ plastic packers and two chemical grout pumps were used to seal the joints between the precast chamber segments. The technique eliminated the water leakage, allowing for the chamber to be returned to service.

cement grouting for LRT tunnel construction

Cement Grouting in LRT Construction Project

Location: Toronto, ON
Sector: Infrastructure
Category: Cement Grouting, Soil Stabilization

Description

Performed microfine cement grouting and water-stop operations using polyurethane resins, and provided soil stabilization in cross passage tunnels along the road in a light rail transit (LRT) line construction project.

Waterstop profile installation in pre-cast concrete

Waterstop Profile Installation in Precast Concrete

Location: Fort McMurray, AB
Sector: Energy
Category: Water Cut-off

Description

A general contractor required Multiurethanes’ assistance with the installation of Hydrotite CJ-3030 in precast concrete panels in the construction of a headwall, as part of the overflow system at an oil sands facility, north of Fort McMurray, AB.

Unlike a conventional, poured in place concrete headwall with engineered waterstop, this installation presented various challenges. This application required the Hydrotite to be installed within tight tolerances to allow the precast panels to line-up correctly. Additionally, in order for the Hydrotite to be effective, it had to firmly adhere to the precast concrete surface.

A team of six members from the general contractor’s personnel was trained by Multiurethanes’ engineers on how to install Hydrotite on the precast headwall panels. Following specific guidelines, the training provided for the client detailed the proper surface preparation, the appropriate positioning and the anchoring method for this Hydrotite installation.

Multiurethanes’ on-site technical support continued throughout all stages of the Hydrotite installation. After the completion of the Hydrotite application, the panels were successfully placed on a concrete leveling pad to form the required headwall.

 

Water cutoff in a sewer rehabilitation project

Leak Sealing in Sewer Rehabilitation Project

Location: Markham, ON
Sector: Utilities
Category: Cement Grouting, Water Cut-off

Description

We provided a specialized water cut-off solution for a municipal sewer maintenance project. The project required grouting from surface to repair leaks in a large diameter sewer pipe.

Our solution involved pumping a fast-curing cement plus sodium silicate grout mixture delivered through vertical injection pipes installed around the sewer.

This work required a customized grout plant with multiple pumps and flow meters.