Seli (TBM Grout Plant)



Canada Line LRT Project
Vancouver, BC, Canada

12 m3/hr


  • Conceptual Design
  • Structural/Mechanical Engineering
  • Fabrication of all Equipment
  • Commissioning
  • On-Site Training & Site-Support


  • SD 1000 Colloidal Mixer
  • 40’ Modified Container c/w HVAC
  • 2800 litre Agitation Tank
  • Bentonite Weigh Hopper
  • Feed Screw Conveyors
  • Automated PLC/MCC Control System
  • Water Supply Tank and Feed Pump
  • Admixture Dosing System
  • Pneumatic Systems
  • Two Hydraulic Powerpacks
  • Two Mocol High Pressure Grout Pumps

SELI, joint venturing with SNC-Lavalin, was commissioned to construct twin underground metro tunnels for the Canada Line LRT project in Vancouver. The TBM was the first use in Canada of a through-the-tailskin annular grouting system with two-component grout.

Team Mixing was tasked with designing and providing a fully automated grout batching system which incorporates three storage silos (cement, flyash and bentonite), a colloidal mixer, agitation tank, water delivery system, two high pressure Mocol hydraulic pumps and a sodium silicate delivery system.

The colloidal mixer serves as a mixer, scale and pump, weighing water, cement and flyash directly. Bentonite, as a ‘micro-ingredient’ is pre-weighed in a smaller weigh hopper atop the container. Liquid admix is dosed into the mixer.

Grout is stored in the agitation tank and pumped to holding tanks on the TBM backup when needed.