Grouting Tunnel Cross passage

Cement Grouting to Fill Voids in Tunnel Cross Passage

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

Description

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.

consolidation grouting for construction of a tailings dam

Consolidation Grouting in a Tailings Dam

Location: Sudbury, ON
Sector: Infrastructure
Category: Cement Grouting

Description

A large mining company required upgrades to an existing tailings storage facility to comply with current regulatory standards. The general contractor undertaking the required upgrades retained the services of Multiurethanes to supply cement grouting equipment and experienced grouting specialists for consolidation grouting of fractured rock beneath the alignment of the new tailings dam.

The grout curtain consisted of three rows of holes, drilled to a nominal depth of 10 m. Cement grouting equipment consisted of inflatable borehole packers, electromagnetic flowmeters, progressive cavity pumps, and paddle grout mixers.

Cement grouting for Bridge Rehabilitation

Cement Grouting for Bridge Rehabilitation

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

Description

Our technical staff worked with a heavy civil contractor on an important rehabilitation project performing a variety of cement grouting work to replace the rail bridge that crosses Lansdowne Ave, south of Dundas Street West in Toronto.

A section of the bridge was removed on Friday night and the new section had to be installed and operational by Monday morning. Due to the urgent nature of the work, our grouting specialists used a fast setting grout to fill voids beneath pre-cast concrete sections and grouted anchors to hold the bridge structure.

Our portion of the grouting proceeded very well even though the weather conditions (rain and snow) were less than ideal for grouting work. All of the cement grouting operation was completed on schedule, with satisfactory results.

Chemical injection to repair construction joints

Chemical injection to Repair Construction Joints

Location: Russel, MB
Sector: Heavy Civil
Category: Chemical Grouting

Description

A general contractor in western Manitoba required grouting expertise to stabilize an extra-large construction joint (250 m long) on a dam rehabilitation project. The concrete had started to deteriorate, creating small voids in the joint.

We provided technical support to repair the joint using Multiurethanes Universal resin to prevent water from entering and causing further damage.

The chemical grout filled the voids, stabilized the joint and provided protection against water penetration.

Grout Curtain Wall for a Hydroelectric Dam

Grout Curtain Wall for a Hydroelectric Dam

Location: Nelson River, MB
Sector: Heavy Civil
Category: Cement Grouting

Description

A new hydroelectric dam construction project in Northern Manitoba was delayed due to water seepage at the spillway cofferdam structure.

Our grouting specialists resolve this type of issue on a regular basis by designing and implementing a grout curtain wall.

A cement grouting plan was designed and executed by our experienced technicians and within two weeks of grouting, seepage was reduced from 250lt/s to 140lt/s.

Leak sealing and crack injection around industrial pipe penetrations

Crack Injection around Industrial Pipe Penetrations

Location: Kapuskasing, ON
Sector: Infrastructure
Category: Crack Injection

Description

A large contractor was looking for a uniquely qualified partner to complete concrete crack injection work at Little Long Generating Station, a remote Northern construction project.

This job involved precision drilling work for crack injection to avoid the unknown conduits and pipes buried within the structure. Multiurethanes experienced technicians completed the project professionally and on time.