Rock types

General lithology

PFM behavior of rocks

GS

Representative groups

RGS

Jointing or cracking

Permeability coefficient (cm/s)

Moisture

Void ratio

Deformability of soil (MPa)

Plasticity index

Compressive strength (Mpa)

Any type of rock, sedimentary or crystalline (this material can be characterized by a propagation velocity of shear wave greater than 800 m/sec.)

Impermeable limestones, basalts, and esites, low degree of weathering, little fracturing rocks with high shear strength, low level of groundwater.

Drop

Basalt, diabase, gabbro

0.08

Rigid floors of thickness less than 60 m to the rock base, provided that the upper layers are composed of stable deposits of sand, gravel or hard clays (this material can be characterized by a propagation velocity of shear wave between 450 and 750 m/sec.).

0 - 0.25

Periods are between 0.3 and 0.5 sec.

Andesite, diorite, porphyry, granite

0.16

Less than 3%

Less than 10 - 8

Between 0% - 10%

Less than 0.15

Greater than 20,000

Less

Greater than 80

Serpentinite, rhyodacite, rhyolite, marble, limestone compact

0.24

to 30

Stable deposits of non-cohesive soils or hard clays when its depth to bedrock exceeds 60 m and the upper layers are composed of sand, gravel or hard clays (this material can be characterized by a propagation velocity of shear wave between 240 and 450 m/sec.)

High degree of weathering of rocks mentioned enzymes and massive clastic sedimentary rocks, low shear strength, shear fracture.

Moderate

Permeable limestones,

0.28