Transmission And Substation Foundations - Technical Design Manual

APPENDIX B: LOAD TESTS

Static Axial Load Tests (Compression/Tension)

Axial Compression Load (kip) Axial Compression Load (kip)

0

20 20

30 30

40 40

50 50

60 60

70 70

80 80

0

10

0

Elastic Compression = PL/AE

0.2 0.2

0.4 0.4

0.6 0.6

0.8 0.8

Axial Deflection (in)

1 1.0

1.2 Axial Deflection (in) Deflection (in) 1.2 1.4 3.0 2.5 2.0 1.4 1.0 1.5 2.0 2.5 3.0 Deflection (inches)

Type SS5 1-1/2" Square Shaft Screw Pile 10"-12" Lead Section 12'-0 Overall Length Installed Torque - 4,000 ft-lb Type SS5 1-1/2” Square Shaft Screw Pile 10”-12” Lead Section 12’-0 Overall Length Installed Torque - 4,000 ft-lb

10% Dave + PL/AE

ASTM D1143 “Quick Test” Compression Plot, Figure B-7

References 1. AC358 Acceptance Criteria for Helical Systems and Devices, ICC-Evaluation Services, June 2013 Revision. 2. ASTM D1143-07, Static Load Test Method for Piles under Static Axial Compressive Load, American Society for Testing and Materials, Philadelphia, PA. 3. ASTM D3689-07, Standard Test Method for Pile under Static Axial Tension Load, American Society for Testing and Materials, Philadelphia, PA.

4. ASTM D-3966-07, Standard Test Method for Piles under Lateral Load, American Society for Testing and Materials, Philadelphia, PA. 5. Canadian Foundation Engineering Manual, Canadian Geotechnical Society, 1985. 6. Crowther, Carroll L., Load Testing of Deep Foundations, John Wiley and Sons, 1988. 7. Davisson, M.T., High Capacity Piles, Department of Civil Engineering, Illinois Institute of Technology, Chicago, IL, 1973.

Elastic Tension + 0.10D ave Elastic Compression + 0.10D ave

0.5 0.5

Elastic Tension Elastic Compression

0.0 0

10 10 15 15

20 20

30 30 35 35

40 40 45 45

50 50

0

5

25

Axial Tension Load (kip) Axial Tension Load (kip)

ASTM D3689 “Quick Test” Tension Plot, Figure B-8

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