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 |