Civil Insight: A Technical Magazine Volume 2 | Page 26

26
TEACHERS’ SECTION
CIVIL INSIGHT 2018

Figure 1: Geometry of tapered pile (a) complete section; and (b) segment at depth x (after

Kodikara and Moore, 1993)
When slip occurs at the pile-ground interface, the vertical pile movement up at any point X on the pile-ground
interface is greater than the vertical ground movement ug at the corresponding point Y on the interface. As
shown in Figure2 (b), pile displaced from point X to X’ while at the same time, ground moves from point Y to
Y’ in such a way that the component of lateral movement (radial expansion) v, can be determined in the form:
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(6)
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Figure 3: Effect of angle of tapering on
normalized average vertical shear stress
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Figure 4: Total skin friction at 0.1
settlement ratios