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Tunnel Boring Maching

Photo: Donaldson Associates

​COWI has built a significant bank of in-house knowledge within the Tunnel Boring Machine (TBM) sector both in urban and non-urban areas in rock, soft soil and subaqueous environments.

Our engineers are internationally recognised for their technical expertise in TBM tunnel design in a wide range of geological and hydro-geological conditions. 

TBM specification

Advances in TBM design have resulted in the ability to construct bored tunnels in congested urban locations, under deep waterways and at increasing depths. Tunnels are constructed in both hard rock and soft ground conditions, large and small diameter, to meet the requirements for a wide range of applications.

Bored tunnel services

  • Technical and economic feasibility of bored tunnels, impact assessment, construction methods and applicable TBM selection
  • Design of segmental linings for water tightness, durability and fire resistance and design of tunnel alignment
  • Review of TBM design and manufacture, TBM specifications, review of TBM operating procedures and TBM supervision
  • Analysis, prediction and mitigation of ground movement and settlement from tunnelling
  • Tunnel construction programming, site supervision  and tunnelling risk assessments
  • Mechanical and electrical design for permanent works

LAST UPDATED: 22.12.2016