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Rock Geotechnical Design Properties
Search for rock geotechnical design properties based on rock type and RMR.
Please note:
these estimates are for feasibility studies only.
Select rock type and select all the joint details to calculate the RMR & estimate the geotechnical design properties.
Rock type:
All
Amphibolite
Andesite
Basalt
Chert
Claystone
Coal
Conglomerate
Diorite
Fresh Basalt
Gabbro
Gneiss
Granite
GranoDiorite
Granulite
Greenschist
Greywacke
Limestone
Marble
Mudstone
Mylonite
Peridotite
Quartzite
Rhyolite
Sandstone
Schist
Serpentinite
Shale
Siltstone
Syenite
Tuff
Joint spacing:
-
>3m
1-3m
0.3-1m
50-300mm
<50mm
RQD:
-
>90%
75-90%
50-75%
25-50%
<25%
Joints condition:
-
Very rough surfaces, no separation, unweathered walls
Slightly rough surfaces, separation <1mm, slightly weathered walls
Slightly rough surfaces, separation >1mm, highly weathered walls
Slicken sided sufaces, seperation 1-5mm continuous
Seperation >5mm continuous
Groundwater:
-
Completely dry
Moist, interstitial water
Water under moderate pressure
Severe water inflow
Calculated RMR range:
My estimated range of geotechnical design properties are:
Unit weight
kN/m
2
UCS
MPa
Friction Angle
o
Cohesion
kPa
The table below shows how we filtered the empirical data to estimate your soil properties
Rock type
Strength
UCS Min. (MPa)
UCS Max. (MPa)
UCS Avg. (MPa)
Density Min. (kN/m
3
)
Density Max. (kN/m
3
)
Density Avg. (kN/m
3
)
RMR Strength Score
Grade