Tunnel Injections for Heavy Water Losses

The project

During the construction of a tunnel, the client encountered a point with particularly large amounts of water inflow, requiring a high-performance injection system. High-resistance packers were installed and direct injection points were set up in the fractures of the The injection was performed using the SILVER 18 3K, which, with its maximum flow rate of 18 l/min, allowed the area to be quickly saturated. overcoming water pressure and ensuring continuity of work. The third flushing pumpkept the lines clean between injections, preventing hardening and machine downtime.

Goals

  • Quickly stop high-flow water spills
  • Consolidate the rock and stabilize the excavation face
  • Seal fractures and discontinuities with different resins, depending on the need
  • Maintain operational continuity even with fast-reacting materials

Why SILVER 18 3K is ideal for tunneling

  • Flow rate 18 l/min, essential for major water leaks
  • Pressure up to 120 bar, easily adjustable
  • Precise 1:1 mixing ratio for two-component resins
  • Third integrated wash pump (6.5 l/min)
  • 3 HP class H electric motor, with automatic protection
  • Compact and robust trolley, suitable for underground construction sites
  • Minimal maintenance, ideal for continuous use
The ability to handle acrylic, epoxy, and two-component expanding resinsmakes SILVER 18 3K a versatile solution for all phases of tunnel consolidation and waterproofing.

The results

  • Thanks to SILVER 18 3K, the company achieved:
    • Effective blocking of water leaks, even under high pressure
    • Stable consolidation of the rock matrix
    • Uniform distribution of resins (acrylic, epoxy, foaming)
    • Reduced intervention times with consistently clean lines thanks to the flushing pump
    • No machine downtime, even during long, continuous cycles
    The customer highlighted that the high flow rate was crucial in overcoming the water flow and ensuring that the material reached the heart of the fractures.

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