| Name | Type | Description |
|---|
| AreaID |
P_SINGLEVALUE
/
IfcIdentifier
|
Identification of the single, specific mapped feature in the same mapped zone.
NOTE Mapped zone is represented in IFC using IfcSpatialZone with PredefinedType MAPPEDZONE.
|
| CoveragePercentage |
P_SINGLEVALUE
/
IfcPositiveRatioMeasure
|
Coverage in percentage of the mapped feature in relation to the mapped zone, e.g. tunnel face, to which it belongs.
|
| Weathering |
P_ENUMERATEDVALUE
/
IfcLabel
/
PEnum_Weathering |
Description of the physical and chemical changes produced by atmospheric agents in rocks or other deposits at or near the earth's surface. These changes result in disintegration and decomposition of the material.
NOTE Definition according to ISO 14689:2017.
|
| DiscontinuitySpacing |
P_ENUMERATEDVALUE
/
IfcLabel
/
PEnum_DiscontinuitySpacing |
The term "spacing" refers to the mean or modal spacing of a set of discontinuities and is the perpendicular distance between adjacent discontinuities. The discontinuity spacing should be measured in millimetres.
NOTE Definition from ISO 14689:2017, Table 8.
|
| GSI |
P_BOUNDEDVALUE
/
IfcInteger
|
The Geological Strength Index (GSI): A characterization tool for assessing engineering properties for rock masses.
NOTE Definition from Marinos & Hoek (2000) GSI: A Geologically Friendly Tool For Rock Mass Strength Estimation. Link
|
| RMR |
P_SINGLEVALUE
/
IfcInteger
|
The rock mass rating (RMR) is a geomechanical classification system for rocks.
NOTE Definition from ASTM (1988). Standard Guide for using the Rock Mass Rating (RMR) System (Geomechanics Classification) in Engineering Practices. American Society for Testing and Materials, Book of Standards D5878-08, v.04.09, Philadelphia, PA.
|
| QValue |
P_SINGLEVALUE
/
IfcReal
|
A description of the rock mass stability of an underground opening in jointed rock masses.
NOTE Definition from Barton, N.R.; Lien, R.; Lunde, J. (1974). Engineering classification of rock masses for the design of tunnel support. Rock Mechanics and Rock Engineering.
|
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