Coordinate everything inside the lining.
Tunnel space is fixed early and difficult to change. We coordinate structure, clearances and internal systems against the alignment before access becomes constrained.
Constrained space makes every interface consequential.
Tunnel BIM modelling develops bored or cut-and-cover structures around alignment, excavation geometry, permanent linings and connected portals. Cross passages, shafts, sumps, niches and internal fit-out must remain coordinated within a tightly defined envelope.
Underground errors are costly to absorb. A misplaced opening can affect reinforcement and waterproofing, while an uncoordinated cable or ventilation route can reduce operational clearance or obstruct maintenance access.
CNE combines civil, structural and M&E information with the governing alignment and ground context. The model supports interface review through changing excavation, structural and fit-out stages without treating the finished tunnel as one static tube.
Structure, ground and systems in one context
Alignment, excavation profile, segmental lining, rings, joints and local features are developed to the required model detail.
Base slabs, walls, roof slabs, temporary works zones and connections are coordinated with excavation and surrounding assets.
Openings, connecting structures, stairs, sumps and access routes are modelled against lining and ground interfaces.
Tunnel approaches, ramps, retaining works and changes in structural form are coordinated with surface infrastructure.
Ventilation, drainage, fire protection, power, lighting and communications are routed within clearance and access constraints.
Models, sections, interface views and issue records are structured for excavation, lining, fit-out and final asset stages.
Underground coordination needs sectional thinking.
Tunnel components are checked against controlled route geometry rather than positioned as isolated structural objects.
Cross passages, penetrations and niches are coordinated with reinforcement, waterproofing and internal systems.
M&E routes are tested against operating, evacuation and maintenance space throughout the tunnel section.
Resolve the tunnel section before excavation fixes it.
Share your alignment, structural concept, ground information and systems scope. CNE will define a tunnel model built around critical underground interfaces.