Case Studies on Potential Adverse Effects of Pile ... - Gnpgeo.com.my
Case Studies on Potential Adverse Effects of Pile ... - Gnpgeo.com.my
Case Studies on Potential Adverse Effects of Pile ... - Gnpgeo.com.my
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3/29/2010<br />
Overview<br />
Comm<strong>on</strong> problems <strong>of</strong><br />
installing displacement<br />
piles in s<strong>of</strong>t ground<br />
Design robustness <strong>of</strong> piled<br />
supported wall<br />
Comm<strong>on</strong> overlooked<br />
issues <strong>of</strong> pile testing<br />
instrumentati<strong>on</strong><br />
<str<strong>on</strong>g>Case</str<strong>on</strong>g> 1: <strong>Pile</strong> Heave & Lateral Soil Displacement<br />
Rapid pile installati<strong>on</strong> in in<strong>com</strong>pressible s<strong>of</strong>t soil induces<br />
Vertical heave in shallow depth (relatively less c<strong>on</strong>finement from<br />
weight <strong>of</strong> overburden soils)<br />
Lateral displacement in deeper depth (with soil c<strong>on</strong>finement)<br />
C<strong>on</strong>sequences :<br />
Up-heaving soil movement causes tensile stress <strong>on</strong> pile & toe lift up<br />
during driving & downdrag after pore presure dissipati<strong>on</strong><br />
Lateral soil displacement causes flexural stress <strong>on</strong> pile & pile<br />
deviati<strong>on</strong><br />
Excessive <strong>com</strong>bined tensile and flexural stresses lead to pile joint<br />
dislodgement<br />
Excessive foundati<strong>on</strong> settlement in post c<strong>on</strong>structi<strong>on</strong> (pile toe<br />
uplifting & downdrag settlement)<br />
2
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