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 22Ewere 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.
A restoration contractor refurbishing the canal and lock gates found a 3/8” x 40’ joint within the canal wall which needed to be sealed from infiltration of water.
Work commenced from within the trench and above the wall, where 3/8” holes were drilled into the canal wall. 80 holes were drilled in a staggered pattern atop the wall, holes were drilled every 12” straight down into the joint at a depth of 18”, and holes were drilled every 6” at a 60-degree angle to intersect the joint towards the face of the wall at a depth of 21”. 3/8” plastic packers were placed into the drilled holes and the 40’ joint was then pargeted with hydraulic cement to ensure the limited loss of injected material.
The injection process took place in 2 stages; the first stage of the injection began with the injection of epoxy into the holes which were spaced every 6” and drilled at a 60-degree angle towards the face of the canal wall, to ensure the limited loss of injected material. The epoxy cured sealing the joint towards the canal, and the hydraulic cement cured sealing the joint towards the trench, with the expectations of inclosing the epoxy for the second stage of injection. The second stage of injection then took place by injecting into the holes which were drilled every 12”, straight down into the joint at a depth of 18”. The joint was filled with epoxy, forming a rigid barrier, preventing the infiltration of water into the canal wall.
Chemical grout injection using epoxy resin (part A and B), 3/8” plastic packers, and a chemical grout pump were used to seal the joint in the canal wall. The application eliminated the possibility of future water infiltration into the canal wall.
A building restoration contractor experienced water leakage into the mechanical room from 2” diameter holes which contained glycol lines running through them, to melt snow on a vehicle ramp.
Working within the mechanical room, 5/16” break lines were placed at a depth of 8” into the holes. These holes were then sealed with hydraulic cement, and when cured water was then introduced through the brake lines into the holes. Polyurethane resin was then injected into the holes, filling the holes and forming a semi-rigid foam barrier, preventing further water leakage.
Chemical grout injection using Universal Resin, Universal Accelerator, 5/16” brake lines, and two grout injection pumps were used to fill the holes in the wall. The technique eliminated further water leakage into the mechanical room.
While working on site at a Toronto Lakeshore high-rise development adjacent to Lake Ontario, Multiurethanes encountered a challenging situation performing water abatement and soil stabilization for the required high-rise foundation construction. With frigid January temperatures, the soil on one side of the wall became too unstable to work around. The site superintendents decided to halt all construction work while Multiurethanes stabilized the soil and stopped the flow of water.
Our grouting specialists faced with the challenge of securing the worksite to achieve these goals. Our team developed an innovative and unique solution; consisting of attaching a metal plate between perpendicular supports to strengthen the cracked wall, drilling grout equipment access holes in the metal plate, and performing cement grouting injections.
This solution proved to be very successful and our client was extremely impressed with our team’s innovation and quick thinking to de-escalate an unsafe work environment, as well as the completion of our assigned tasks. They have since asked us to perform this same solution technique to other challenging projects.
Voids within a century old church tower required a low-density fill to prevent water infiltration from migrating within the masonry structure. Multiurethanes technical team safely filled the existing voids using durable chemical grout materials.
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.
Multiurethanes provided soil stabilization for a complex tunnel project with several site restrictions including no drilling from surface and working in close proximity to sewer and water mains. Our solution involved sodium silicate grouting delivered through horizontal injection pipes arrayed out from inside a shaft. Injection of Universal Resin was also performed in localized areas. We specialize in projects with technical, complex grouting requirements.
Our technical team developed a solution to lift train track crossings on wood ties by pressure grouting under the tracks. This new approach was fast, reliable and surprised the utility contractor, who had been looking for this solution for a long time. Multiurethanes technicians bring practical product knowledge and hands-on experience for applying proven grouting techniques to new applications.
Loose fill surrounding a manhole structure required stabilization. Multiurethanes technicians injected Universal Resin through vertical injection pipes to stabilize the fill prior to cutting through the structure wall.
Applied a chemical grouting solution involving sodium silicate, delivered through sleeve pipes, after surface voids formed during a directional drilling project beneath an airport construction job site.
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