Direct Shear Test - Soil Properties: Testing, Measurement, and Evaluation - page 388

1

[B] Shear Stress Data (Specimen no. )

20.6

(1) Normal load lb

normal load
initial area of specimen [i.e., part [A] (4)] 144

(2) Normal stress i.e.,

604

lb/ft 2

3,125

(3) Proving ring calibration lb/in.

0.05

(4) Rate of shear in./min

Vertical Horizontal Proving Cross-Sectional

Dial Displacement Ring Dial Horizontal Area of

Reading Dial Reading Reading Shear Force Specimen Shear Stress

(in.) (in.) (in.) (lb) (in. 2 ) (lb/ft 2 )

(4) (3) (5) initial

(4)
(5)

(1) (2) (3) proving ring area of

(6) 144

calibration specimen

0 0 0 0 4.91 0

0.0030 0.025 0.0030 9.4 4.91 276

0.0050 0.050 0.0063 19.7 4.91 578

0.0070 0.075 0.0102 31.9 4.91 936

0.0080 0.100 0.0124 38.8 4.91 1,138

0.0090 0.125 0.0142 44.4 4.91 1,302

0.0095 0.150 0.0155 48.4 4.91 1,419

0.0100 0.175 0.0163 50.9 4.91 1,493

0.0100 0.200 0.0166 51.9 4.91 1,522

0.0110 0.220 0.0163 50.9 4.91 1,493

0.0115 0.240 0.0159 49.7 4.91 1,458

0.0115 0.260 0.0150 46.9 4.91 1,375

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