Triaxial Compression Test - Soil Properties: Testing, Measurement, and Evaluation - page 370

[C] Triaxial Compression Data (Specimen no. )

(1) Consolidation pressure on test specimen, 3 psi

(2) Rate of axial strain in./min

(3) Height of specimen after consolidation, H c in.

(4) Proving ring calibration lb/in.

Cross Unit Axial

Elapsed Deformation Axial Sectional Proving Applied Load Pore

Time Dial, H Strain, Area, A Ring Dial Axial Load (Deviator Pressure,

(in. 2 )

(min) (in.) (in./in.) (in.) (lb) Stress) (psi) (psi)

(6) (5)

A c
1

(6)
(4)

¢ H
H c

(1) (2) (3) (4) (5) proving ring (7 ) = (8)

calibration

Minor principal stress (i.e., chamber pressure, 3 ) psi

Unit axial load at failure, p psi
Major principal stress at failure (i.e., 1 3 p) psi

Pore pressure corresponding to unit axial load at failure, f psi

- 3 [i.e., 3 f ]

Effective minor principal stress, psi

- 1 [i.e., 1 f ]

Effective major principal stress at failure, psi

370