Transmission And Substation Foundations - Technical Design Manual

APPENDIX B: LOAD TESTS

Static Axial Load Tests (Compression/Tension)

7 ft (2M) minimum Between Test Pile and Reaction Anchor

Dial Indicator Hydraulic Jack/Cylinder

Reference Beams

Load Beams

Spreader Beam

Cribbing

Reaction Anchor (4 minimum)

Basic Compression Field Test Set-up Figure B-1

Pre-Production Test Schedule, Table B-1 Cyclical Load Increments (%Dl/100) Load Increment

Hold Period (Min.)

Load Increment

Hold Period (Min.)

AL

1

AL

1

0.20DL

4

0.50DL

4

0.40DL

4

1.00DL

4

0.60DL

4

1.20DL

4

0.80DL

4

1.40DL

4

1.00DL

4

1.60DL

4

0.75DL

4

1.80DL

4

0.50DL

4

2.00DL

10

0.25DL

4

1.50DL

4

1.00DL

4

0.50DL

4

AL

5

AL = Alignment Load, usually 10% of DL; DL = Design (Working) Load

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