This glossary provides concise definitions of key terms, ontology classes, and planning
artifacts used across the Solway Firth Tunnel project. Each term includes an anchor for deep
linking from the project page or learning hub.
Key Terms
Solway Firth Tunnel
The main tunnel connecting England and Scotland under the Solway Firth – the focal project
in this ontology.
Ontology: Class st:SolwayTunnel (subclass of dice:Object).
Notes: In the WBS, this aligns with the final project deliverable.
Tunnel Section
A segment of the tunnel with specific properties.
Ontology: Class st:TunnelSection (subclass of dice:Object).
Notes: Each section is linked to a bore and lining.
TBM (Tunnel Boring Machine)
A specialized machine that excavates the tunnel bore while installing support systems.
Ontology: Represented as a resource/equipment in the PDDL model.
Notes: Key to excavation and lining installation steps.
Excavation Process
Process of excavating the tunnel bore.
Ontology: Class st:ExcavationProcess (subclass of dicp:Process).
Notes: Maps to PDDL actions like excavate_and_line_segment.
Segment Installation
Process of installing lining segments.
Ontology: Class st:SegmentInstallation (subclass of dicp:Process).
Notes: Represents lining installation activities.
Geotechnical Report
Assesses ground conditions and informs construction sequencing.
Ontology: Class st:GeotechnicalReport (subclass of dici:InformationContentEntity).
Notes: Supports ground treatment and design decisions.
BFO (Basic Formal Ontology)
A foundational ontology that provides shared categories for entities and processes.
Ontology: Referenced via the bfo: prefix.
Notes: Provides the philosophical base for the project ontology.
Ontology Schema Overview
The Solway Firth Tunnel ontology builds on the Digital Construction ontology and the BFO
foundation. It organizes concepts into Physical Components, Processes, Stakeholders,
Information artifacts, and Lifecycle Phases. Instances such as the tunnel, sections, and
linings are linked through part-whole relationships.
Key construction processes include excavation, lining installation, ground treatment, and
site preparation. Deliverables include design documents, environmental assessments, and
geotechnical reports, each with a defined role in the project lifecycle.
Excavation Process: Creates the tunnel bore and establishes the path for lining installation.
Segment Installation: Places precast segments to form the tunnel lining and provide structural support.
Ground Treatment: Stabilizes soil and water conditions before excavation begins.
Geotechnical Report: Documents ground conditions and informs the design approach.