Case Studies on Potential Adverse Effects of Pile ... - Gnpgeo.com.my

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3/29/2010 Overview Common problems of installing displacement piles in soft ground Design robustness of piled supported wall Common overlooked issues of pile testing instrumentation <strong>Case</strong> 1: Pile Heave & Lateral Soil Displacement Rapid pile installation in incompressible soft soil induces Vertical heave in shallow depth (relatively less confinement from weight of overburden soils) Lateral displacement in deeper depth (with soil confinement) Consequences : Up-heaving soil movement causes tensile stress on pile & toe lift up during driving & downdrag after pore presure dissipation Lateral soil displacement causes flexural stress on pile & pile deviation Excessive combined tensile and flexural stresses lead to pile joint dislodgement Excessive foundation settlement in post construction (pile toe uplifting & downdrag settlement) 2
3/29/2010 Pile Joint Dislodgement Pile joints could be dislodged due to excessive flexural and tensile stresses induced by ground heave and radial soil displacement Detectable using High Strain Dynamic Pile Test (HSDPT) Mechanism of Pile Heave & Soil Displacement 3
Page 1: 3/29/2010 Case <st
Page 5 and 6: 3/29/2010 Case Stu
Page 7 and 8: 3/29/2010 Pile Heave Monitoring Res
Page 9 and 10: 3/29/2010 Site Conditions Soil Con
Page 11 and 12: 3/29/2010 1.5m 1.5m Water seepage s
Page 13 and 14: 3/29/2010 Investigation Approach E
Page 15 and 16: 3/29/2010 30m RL29.0m 1m Earth drai
Page 17 and 18: 3/29/2010 Design Scenario A Results
Page 19 and 20: 3/29/2010 Failure Scenario (GWT at
Page 21 and 22: 3/29/2010 Conclusions • Main caus
Page 23 and 24: 3/29/2010 Pile Test Interpretation
Page 25: 3/29/2010 Summary of Pile Instrumen

Case Studies on Potential Adverse Effects of Pile ... - Gnpgeo.com.my

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