A public transportation agency encountered water infiltration into the subway system, due to voids behind the cross passage section of the tunnel.
Working within the cross passage segment of the tunnel, 15 investigative holes were drilled to identify the location of the voids which contained water. Mechanical packers with ball valve assembly were then installed into the drilled holes where the presence of water inflow was observed. Cement grout was continuously injected into the drilled holes via the mechanical packers until grout was detected resurfacing from an adjacent open valve. The resurfacing of grout indicated that the cavity had been filled, as the water had been displaced away from the cross passage section.
Cement grout injection using Multiurethanes Microfine Cement, mechanical packers and a chemical grout pump were used to fill the voids behind the cross passage section. The method eliminated the infiltration of water into the tunnel and allowed utility contractors to work safely within the cross passage.
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.
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.
We provided soil stabilization services at the Eglinton Crosstown Project in Midtown Toronto.
The scope of work involved injecting cement grout around the tunnel liner to fill voids. Our solution involved a microfine cement grout mixture delivered through vertical injection pipes installed around the tunnel.
Microfine cement is able to penetrate very small openings such as soil pores and microscopic rock fissures, in order to improve strength and reduce permeability.
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.
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.
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.