Method Statement - i-astm.com

1 1 Method Statement FORS tatic pile load Test (Compression Test,Tension Test and Lateral Test) PREPARED BY 2 Method Statement FORCOMPRESSION, TENSILEAND LATERAL pile load TESTPROJECT INFORMATIONO wner : .. Client : .. Main Contractor : .. Contractor : .. Location.

2 TEST pile INFORMATIONPile No. 385 pile No. 368 pile No. 416 pile Type 40 x 40 Driven 40 x 40 Driven 40 x 40 Driven pile Tip m. m. m. pile Top m. m. m. Design load 65 tons 15 tons 7 tons Maximum Test load (200 % of design load )130 tons 30 tons 14 tons Test Type Axial Compression TestAxial Tension Test Lateral Test Anchor Piles 367, 368, 416, 417 367, 369 432, 417, 385 Testing Standard ASTM D1143-81 (Reapproved 1994)ASTM D3689-90 (Reapproved 1995)ASTM D3966-90 (Reapproved 1995) TESTING APPARATUS Beam The steel girders will be laid across the test pile with system set up similar to that shown in Appendix A.

3 Jacks Axial Compressive Test : One hydraulic jack (1x400) ton capacity will be provided on top of the pile head as loading apparatus. Axial Tension Test : One hydraulic jack (1x165) ton capacity will be provided on top of the pile head as loading apparatus. Lateral Test : One hydraulic jack (1x59) ton capacity will be provided on the side of the pile head as loading apparatus. Ball Bearing To provide non-eccentric load to the pile head, a ball bearing shall be inserted in between the reaction beam and the hydraulic jack.

4 Dial gauges Four dial gauges (Mitutoyo brand) will be provided to monitor the pile movements by mounting between the pile head and reference beams. The micrometer has a range of 0-50 mm and an accuracy of mm. Beam Two reference beams (channel 125x65x5 mm) will be cross-connected and laid on support, firmly embedded in ground with one end fixed and the other end freed. Leveling instrument Relative movements of the test pile head, reference beam and anchor pile will be checked by a Shokisha precise leveling instrument with an accuracy of mm.

5 Readings will be made on ruler scale fixed on the reading points (1 point at pile head, 2 points at reference beams and 1 point at each anchor pile ). TEST PROCEDURE Compression pile load Test The test shall conform to the modified ASTM D 1143-81(Reapproved 1994) item Standard Loading Procedure with load sequence in percentage of design load . Three cycles of test will be performed. Cycle 1 (maximum to 100% of the design load ) A. The load will be added gradually by increasing from initial 0 to 25%, 50%, 75%, and 100% of the design load .

6 B. When each load increment will be achieved, the next load increment will be added only when the settlement rate will be less than mm per hour or after 2 hours, whichever shall occur first. C. At each load increment, load , settlement and time will be recorded at 1, 2, 4, 8, 15, 30, 60, 90, 120, 240 minutes and every 2 hours with an accuracy of at least mm. D. The maximum load will be kept constant for at least 24 hours and then reduced to 75%, 50%, 25% and 0% of the design load , respectively. Each load will be maintained until the rate of settlement would not be greater than mm per hour or after two hours, whichever shall occur first.

7 E. At "0" load , rebound movement will be recorded at 1, 2, 4, 8, 15, 30, 40, 60 minutes and every hour thereafter until a constant settlement will be reached. Cycle 2 (QUICK TEST, maximum to 200% of the design load ) 4 A. The load will be added gradually by increasing from initial 0 to 25%, 50%, 75%, 100%, 125%, 150%, 175% and 200% of the design load . B. When each load increment will be achieved, the next load increment will be added every after 5 C. At each load increment, load , settlement and time will be recorded at 1 and 5 minutes with an accuracy of at least mm.

8 D. The load will then be reduced to 175%, 150%, 125%, 100%, 75%, 50%, 25% and 0% of the design load , respectively E. At "0" load , rebound movement will be recorded at 1, 2, 4, 8, 15, 30, 40, 60 minutes and every hour thereafter until a no further settlement will be The test pile will be considered failure when a rapid progressive movement of the pile in the direction of loading under a constant load or physical failure of the test pile is observed or a settlement of more than 15% of the diagonal dimension of the pile , which is equivalent to 90 Tension pile load Test The test shall conform to the ASTM D 3689-90 (Reapproved 1995)

9 Standard Test Method for Individual Piles Under static Axial Tensile load . with load sequence as explain below. The test will be conducted until the pile exhibit signs of failure. Cycle 1 (maximum to 100% of the design load ) A. The load will be added gradually by increasing from initial 0 to 25%, 50%, 75%, and 100% of the design load . B. When each load increment will be achieved, the next load increment will be added only when the settlement rate will be less than mm per hour or after 2 hours, whichever shall occur first.

10 C. At each load increment, load , settlement and time will be recorded at 1, 2, 4, 8, 15, 30, 60, 90, 120, 240 minutes and every 2 hours with an accuracy of at least mm. D. The maximum load will be kept constant for at least 24 hours and then reduced to 75%, 50%, 25% and 0% of the design load , respectively. Each load will be maintained until the rate of settlement would not be greater than mm per hour or after two hours, whichever shall occur first. E. At "0" load , rebound movement will be recorded at 1, 2, 4, 8, 15, 30, 40, 60 minutes and every hour thereafter until a constant settlement will be reached.