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 />
<strong>Pile</strong> Heave M<strong>on</strong>itoring Result<br />
30<br />
25<br />
Measured <strong>Pile</strong> Heave (mm)<br />
20<br />
15<br />
10<br />
5<br />
<strong>Pile</strong> No.1<br />
<strong>Pile</strong> No.3<br />
<strong>Pile</strong> No.4<br />
<strong>Pile</strong> No.5<br />
<strong>Pile</strong> No.6<br />
<strong>Pile</strong> No.7<br />
<strong>Pile</strong> No.8<br />
<strong>Pile</strong> No.9<br />
<strong>Pile</strong> No.10<br />
<strong>Pile</strong> No.11<br />
<strong>Pile</strong> No.12<br />
0<br />
1 2 3 4 5 6 7 8 9 10 11 12<br />
<strong>Pile</strong> Installati<strong>on</strong> in Sequence<br />
Summary <strong>of</strong> <str<strong>on</strong>g>Case</str<strong>on</strong>g> 1<br />
Ground heave & radial soil displacement due to rapid<br />
installati<strong>on</strong> <strong>of</strong> displacement pile in s<strong>of</strong>t in<strong>com</strong>pressible s<strong>of</strong>t clay<br />
can pose serious integrity problem <strong>on</strong> pile foundati<strong>on</strong>.<br />
Soluti<strong>on</strong>s :<br />
Use larger pile spacing & reduce rate <strong>of</strong> clustered pile installati<strong>on</strong> for<br />
adequate time for dissipati<strong>on</strong> <strong>of</strong> excess pore pressure<br />
Simultaneous pile installati<strong>on</strong> at mirror pile locati<strong>on</strong> from centre<br />
outwards to minimise net lateral displacement, but this improves<br />
nothing <strong>on</strong> ground heave<br />
Str<strong>on</strong>ger pile structural strength & joint to withstand tensile &<br />
flexural stresses<br />
Staggered pile installati<strong>on</strong> sequence or install piles at alternate<br />
locati<strong>on</strong>s<br />
Restrike all piles with HSDPT to detect pile integrity if ground or soil<br />
heave is observed.<br />
7
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