Estimation of Allowable Bearing Capacity of Basement Rock


We have a location where a Standard Penetration Test (SPT) has been done up to 22m below the ground level, and additional 8m coring in weathered rock, with "ZERO" Rock Quality Designation (RQD) values, when the Client ordered termination of boring.

How can we estimate the allowable bearing capacity of this rock? Is carrying out Uniaxial Compressive Strength (UCS) test, the only possible method?

Many thanks in advance.

Rock Mechanics Design Deep Foundations

1 Answer

Votes: 0

Abdul Jabbar

You may perform point load tests on the rock material and u can correlate it with Ucs value.   The angle of repose can be consider in calculating allowable bearing capacity.The Angle of Repose because Rock Triaxial instruments are rarely available in the local industry. Further reading is recommended on intermediate Geo-Materials ”IGM