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# Numerical Simulation of Pile using PLAXIS

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### Numerical Simulation of Pile using PLAXIS

1. 1. Field Tests and Numerical Simulations BY NAVEEN.B.P Research Scholar, IISc
2. 2. 2 Contents  Introduction  Analysis for single pile under Vertical Axial Load  Analysis for single pile under Lateral Load  Analysis of Soil nailing  Lateral Movement of Secant pile wall-Real time monitoring at B’Lore Metro.  Comparison of FLAC 3D and PLAXIS 3D
3. 3. Single pile under Vertical Axial Load Field Tests: Routine Vertical Load Test
4. 4. Field Vertical pile load test data Load (kN) 0 500 1000 1500 2000 2500 3000 3500 0 Settlement (mm) 5 10 15 Total Load [kN] 20 25 30 35 • This test is for a large diameter pile (diameter = 1300 mm), (Length = 9.5m)
5. 5. Numerical Simulations  Axi Symmetry geometry model.  The element mesh - 15-node element.  Geometry : 2D: 4m x 14.5m  Pile radius:0.65m ; Length: 9.5m .  5 noded beam-column element. 3 DoF per node.  Ground water table is located at 3.5m.  Stage-wise loading done, upto 3250kN.
6. 6. Evaluating End Bearing & Skin Friction From Plaxis 2D Curve Load (kN) 0 250 500 750 1000 1250 1500 1750 2000 2250 2500 2750 3000 3250 3500 0 Total Load [kN] 5 Skin Friction [kN] Base Load [kN] Settlement (mm) 10 Total Load with Plaxis Base Load Plaxis 15 Skin Friction Plaxis 20 25 30 35 40 Method IS code Meyerhoff’s PLAXIS 2D Skin friction (kN) 3674 1940 2183 End bearing (kN) 1646 8840 1067 Total Load ( kN) 5320 10780 3250
7. 7. Soil nailing
8. 8. Fig: Factor of safety =3.17
9. 9. 1. Metro(Jayanagar)-Group of piles (4) Dia 1.2 m 3.Flyover(Kalyan nagar )-Group of piles (5) Dia 1.2 m 2. Metro (M.G Road)-Monopiles Dia 1.6 m 4. Flyover (HSR Layout)-Group of piles (4) Dia 1.0 m FEW PILE LOAD TESTS WHERE I WAS INVOLVED
10. 10. 1. Metro(Jayanagar)-Group of piles (4) Dia 1.2 m 3.Flyover(Kalyan nagar )-Group of piles (5) Dia 1.2 m
11. 11. Comparison of Dynamic load test with Numerical simulation of PLAXIS 2D
12. 12. Dynamic Pile Monitoring HAMMER & CRANE For each blow determine • Capacity at time of testing • Pile integrity • Pile stresses • Hammer performance Last three items detect or prevent problems For driven piles Load (kN) 0.00 0.00 500.00 1,000.00 Settlement (mm) 2.00 4.00 Static Load Test 6.00 8.00 10.00 12.00 STRAIN GAUGE & ACCELEROMETER
13. 13. Numerical Simulation: Plaxis 2D  Axi Symmetry geometry model.  The element mesh - 15-node element.  Geometry : 2D: 5m x 15m  Pile radius:0.25m ; Length: 15m .  5 noded beam-column element. 3 DoF per node.  No Ground water table is located.  Stage-wise loading done, up to 120mT. Medium
14. 14. RESULTS OBTAINED WITH DYNAMIC LOAD TESTS CORRELATE WELL WITH THE RESULTS OF STATIC LOAD TEST Load (kN) 0.00 0.00 200.00 400.00 600.00 800.00 1,000.00 1,200.00 PLAXIS 2D Static Load Test 2.00 Base load by PLAXIS 2D Settlement (mm) Skin friction by PLAXIS 2D 4.00 6.00 8.00 10.00