List of Available Soil Parameters

Designation of references

Designations of modules in Robot

Field name

Field description

Application in Robot modules

References

Unit weight

Ratio of the soil sample weight to its volume

ρ = M / V

A,B,C,D,E,F,G

In all calculations, when calculation of the soil weight is needed

[1] 3.3.3

[2] 5.4

[3] 3.3.6

[4] 3,21

[7] 2-5

[8] Chapter 3 2

Unit weight of soil solids

Unit weight of soil solids, that is, ratio of the weight of soil particles to their volume:

ρ = M / Vs

This quantity is sometimes represented as the ratio of the soil particle density to the water density. Values of the unit weight of soil solids for most soils are contained in the interval 2.55 -2.65 [kN/m 3 ] 160- 165 [pcf].

A, B, C, D,

Parameter used in all calculations, in which the soil weight inclusive of ground water should be considered. It is applied both for the calculation of the hydrostatic uplift and the weight of soil with voids (pores or spaces between particles) filled with water.

[2] 5.5

[3] 3.3.6

[7] 2-2; 2-5

[8] Chapter 3 2

Water content

Ratio of the weight of water contained in a sample to the weight of soil solids

-

[2] 5.5

[3] 3.3.6

[7] 2-3

Poisson's ratio

ν - Poisson's ratio of soil (module of soil transverse deformation)

Poisson's ratio is a quantity calculated on the basis of triaxial and uniaxial stress tests.

C, F

In calculations of the transverse displacement of a retaining wall and the soil elasticity coefficient.

[6] App. 4

[7] 2-3

Oedometric compressibility modulus

M - Secondary modulus of compressibility under triaxial stress. Calculated on the basis of the oedometer test after a consolidation cycle (loading - unloading).

A, B, C, D

In calculations of the settlement, if the excavation unloading is considered (primary consolidation).

[1] 3.3.8; App. D

[2] 7

[3] 3.4.5; 3.5.2

[7] 2-10

[8] Chapter 3 4

Oedometric modulus of primary compressibility

M 0 - Primary modulus of compressibility under triaxial stress. Calculated on the basis of the oedometer test in the first loading cycle.

A, B, C, D

In calculations of the settlement.

[1] 3.3.8; App. D

[2] 7

[3] 3.4.5; 3.5.2

[7] 2-10

[8] Chapter 3 4

Consolidation coefficient,

consolidation index

β - Rheological coefficient, ratio of the primary deformation modulus to the secondary deformation modulus:

F

In the calculation of the soil elasticity coefficient, if consolidation effects are considered.

[3] 3.4.5;

[4] 3,32

[7] 2-10

[8] Chapter 3 4

Soil deformation modulus

E - Secondary modulus of compressibility under uniaxial stress. Calculated on the basis of the oedometer test after a consolidation cycle (loading - unloading).

F

In the calculation of the soil elasticity coefficient, if consolidation effects are considered.

[1] 3.3.8; App. D

[2] 7

[3] 3.4.5; 3.5.2

[4] 3,22; 3,32

[7] 2-10; 2-11.2

[8] Chapter 3 4

Modulus of primary soil deformation

E 0 - Modulus of compressibility under uniaxial stress. Calculated on the basis of the oedometer test in the first loading cycle.

E, F

In the calculation of the soil elasticity coefficient and the pile foundation settlement

[1] 3.3.8; App. D

[2] 7

[3] 3.4.5; 3.5.2

[4] 3,32

[7] 2-10; 2-11.2

[8] Chapter 3 4

Effective angle of internal friction

Φ - Angle of internal friction (natural slope). One of the 2 basic values characterizing the soil strength:

τ = σ * tan(Φ) + c

A,B,C,D,E,F,G

Calculation of load-bearing capacity, friction coefficient, and soil pressure.

[1] 3.3.7

[2] 9

[3] 3.3.6; 3.3.7

[4] 3,21

[7] 2-11; 4-2

[8] Chapter 3 5

Effective cohesion of soil

c - Cohesion of soil. One of the 2 basic values characterizing the soil strength:

τ = σ * tan(Φ) + c

(See the description of the Cohesive soil field.)

A,B,C,D,E,F,G

Calculation of load-bearing capacity, friction coefficient, and soil pressure.

[1] 3.3.7

[2] 9

[3] 3.3.6; 3.3.7

[4] 3,21

[7] 2-11; 4-2

[8] Chapter 3 5

Symbol

Symbol designation of soil.

-

-

Unit value of ultimate soil resistance acting under the pile base

Ultimate pile base resistance. Value per [m 2 ].

E

In calculations of the pile load capacity.

[1] 7.6.3.3

[5] 2.2

[7] 16-7

[9] Chapter 5 3.2

Unit value of ultimate soil resistance along pile shaft

Ultimate pile shaft resistance. Value per [m 2 ].

E

In calculations of the pile load capacity.

[1] 7.6.3.3

[5] 2.2

[7] 16-7

[9] Chapter 5 3.2

Soil state

Soil state classification according to ID and IL.

 

-

[3] 3.3.6

Symbol of cohesive soil designation

Symbol identifying a cohesive soil type.

H

The parameter enabling automatic determination of soil properties according to method B [3].

[3] 1.4.6; 3.3.6

Soil name

Soil name

A,B,C,D,E,F,G

Wherever a soil selection is made.

-

IL/ID

Respectively, the degree of plasticity of a cohesive soil or the degree of compaction of a cohesionless soil.

H

The parameter enabling automatic determination of soil properties according to method B [3].

[3] 3.3.6

Υ min

Material factor of soil - minimal

E

The decreasing material factor, which enables conversion from non-factored values to design (factored) values.

[1] 2.4.2

[3] 3.2

Υ max

Material factor of soil - maximal

-

The increasing material factor, which enables conversion from non-factored values to design (factored) values.

[1] 2.4.2

[3] 3.2

Cohesive soil

The field enabling identification of cohesive soils.

A,B,C,D,E,F,G,H

Every time when calculations require the cohesion of soil to be considered or when the calculations for cohesive and cohesionless soils differ. For soils that are not designated as cohesive, the contents of the Effective cohesion of soil field are ignored.

-

Moisture

Moisture of a cohesionless soil

E, H

The parameter enabling automatic determination of soil properties according to method B [3].

[3] 3.3.6

Foundation-to-soil friction coefficient

Friction coefficient

A, B, C, D

In the calculation of the foundation-to-soil friction.

 

Permeability (hydraulic conductivity) coefficient

Permeability (hydraulic conductivity), Darcy's constant, unit [m/s]

-

[3] App. 3

[7] 2-9

Bearing capacity of soil

Non-factored bearing capacity of soil

A, B, C, D

This value is used only when the options for calculating the bearing capacity of soil are cleared.

[3] App. 2 3

[4] 3,1; 3,2

[7] 4-3

[9] Chapter 4 2

Soil type

Soil name describing a family of soils with common characteristics, such as, gravels, clayey sands, and clays.

H

The parameter enabling automatic determination of soil properties according to method B [3].

[3] 3.3.6

Parent topic: Soil Pressure