Tunneling Support Services

Tunnel construction in urban areas introduces the risk of damage to surface structures as underlying material is removed.

Compensation grouting was done prior to tunnel excavation for this pedestrian walkway.

Compensation grouting (also known as fracture grouting) is a technique that injects grout between a tunnel or pipe and the foundations of surface structures. This offsets the effects of soil decompression during tunnel material removal, which prevents the surface structures from sinking.

Common infrastructure construction projects that employ compensation grouting for tunneling support include:

  • Pedestrian underpasses
  • Highway underpasses
  • Pipeline installation
  • Storm water pipeline installations

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Contact us today to discuss your municipality's tunnel construction support needs.