This feature type is used for geomechanical classifaction for rocks according to the Q-System (RMR) system develped byBarton, Lien, and Lunde. It includes properties for each of the parameters and calculated properties for the Q-Bas and Q-Value.
Characteristic |
Note |
Name |
Q-System |
Path |
\Geotechnics |
Feature type icon |
|
Feature type class |
Regular |
Spatial data support |
Spatial support on observation (SSO) |
Allowed spatial systems |
All |
Allowed Geometry types |
Point, line, polygon |
Allowed contained feature types |
N/A |
Table 1: Characteristics of this feature type
Property structure for type specific feature data
This feature type defines not property structure for type specific feature data.
Property structure for type specific observation data
Property, Property Collection |
Description |
RQD (Rock Quality Designation) RQD |
Designation of Rock Quality Property type: Numeric Default Value: none Validation rule: ≥ 0 and ≤ 100 Display Options: Decimals: 0 |
Jn Bas JnBasic |
Joint set number Property type: Numeric Default Value: none Validation rule: ≥ 3 and ≤ 20 Display Options: Decimals: 1 Hide trailing zeros: true |
Jn Correction JnCorrection |
Joint Set Correction Property type: Numeric Default Value: none Validation rule: ≥ 1 and ≤ 3 Display Options: Decimals: 0 Hide trailing zeros: true |
Jn Jn |
Joint set number (corrected) Calculated property. Calculated with formula: Jn = JnBasic*JnCorrection Property type: Numeric Default Value: none Validation rule: ≥ 0 and ≤ 6 Display Options: Decimals: 0 Hide trailing zeros: true |
Jr Jr |
Joint Roughness number Property type: Numeric Default Value: none Validation rule: ≥ 0.5 and ≤ 5 Display Options: Decimals: 1 Hide trailing zeros: true |
Ja Ja |
Joint Alteration Number Property type: Numeric Default Value: none Validation rule: ≥ 0.05 and ≤ 20 Display Options: Decimals: 0 Hide trailing zeros: true |
Jw Jw |
Joint Water Reduction Factor Property type: Numeric Default Value: none Validation rule: ≥ 0.05 and ≤ 1 Display Options: Decimals: 0 Hide trailing zeros: false |
SRF SRF |
Stress reduction factor Property type: Numeric Default Value: none Validation rule: ≥ 0.5 and ≤ 200 Display Options: Decimals: 0 Hide trailing zeros: true |
QBas QBas |
Property type: Numeric Calculated property. Calculated with formula: QBase = Max(RQD,10)/JnBas * Jr/Ja Default Value: none Validation rule: ≥ 0 and ≤ 15 Display Options: Decimals: 0 |
Q Q |
Property type: Numeric Calculated property. Calculated with formula: Q = (Max(RQD,10) / (JBas* JCorr)) * (Jr/Ja) * (Jw/SRF) Default Value: none |
Table 2: Properties and collections of the type specific observation data property structure
