Pset_FaceExcavationCommon Common properties for face excavation elements. IfcUndergroundExcavation/FACEEXCAVATION IfcUndergroundExcavation/FACEEXCAVATION FaceExcavationType Face excavation type. FULLFACE STAGED PILOTBORE SHAFT CROSSCONNECTION REAMING OTHER FULLFACE Excavation method where the entire tunnel face is worked simultaneously. STAGED Progressive excavation of parts of the tunnel face in sequential steps or stages. PILOTBORE Initial excavation along the axis of the tunnel with a smaller cross-section than the final tunnel, which is later enlarged to the full cross-section. SHAFT Excavation method used for vertical or inclined openings, such as access shafts. CROSSCONNECTION Excavation linking two existing tunnels or openings. REAMING Enlargement of an existing tunnel opening through face excavation. OTHER IsDriveDirectedAlongChainage Specifies whether the tunnel drive direction agrees with the positive chainage direction (true) or if the tunnel drive direction is reversed (false). TunnelInclination Specifies the tunnel inclination relative to the drive direction as specified by IsDriveDirectedAlongChainage. RISING FALLING RISING Tunnel has a rising inclination in the direction of the drive. FALLING Tunnel has a falling inclination in the direction of the drive. DriveInclination Specifies the tunnel drive inclination. HORIZONTAL VERTICAL INCLINED HORIZONTAL Tunnel drive is horizontal (±15°). VERTICAL Tunnel drive is vertical (±85°). INCLINED Tunnel drive is inclined (±15° to ±85°). ExcavationFaceInclination Specifies the inclination of the tunnel face. VERTICAL INCLINED VERTICAL The tunnel face is perpendicular to the tunnel axis. INCLINED The tunnel face is inclined to the tunnel axis. MaxUnsupportedExcavationLength Maximum unsupported length of excavation at the tunnel face.