Description
HOEK – BROWN FAILURE CRITERION
Using a linear approximation of the curvilinear envelope failure criterion of Hoek-Brown, in a range of stress fields, one can obtain the cohesion and angle of shearing resistance parameters of Mohr-Coulomb.
DATA REQUIRED
Compressive strength of the intact rock, GSI (Geological Strength Index), specific rock mass parameters, disturbance factor, and deformation modulus.
Some of the parameters, such as GSI, and own parameters, are identified directly by the software through interactive graphical procedures.
CALCULATED DATA
Constants of the rock mass s e a, tensile strength, the upper limit of confinement stress relative tunnels and slopes, global rock mass strength, cohesion and angle of shearing resistance.
Calculation parameters and design parameters distinguish the geotechnical parameters calculated.
CALCULATION OF PARAMETERS FROM TRIAXIAL TESTS
Through laboratory tests, like triaxial tests, performed with Hoek and Brown cells, in which the peak failure strength is measured with the variation of confinement stress, it is possible to calculate the rock’s resistance to compression and the parameter mi.
FOUNDATIONS BEARING CAPACITY
RockLab allows obtaining of geotechnical parameters according to the following design process.
The check for ultimate limits states of the soil-foundation complex concerns the failure mechanisms determined by the mobilization of global resistance of materials.
The ultimate bearing capacity of the rock mass is calculated using the methods of Carter-Kulhawy and Serrano-Olalla-Gonzales.
Using the ultimate bearing capacity is calculated the design resistance
RESULTS
Results are displayed both numerically and graphically.
The software produces a detailed calculation report.
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