Page 23 - Unit2.docx

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Figure 3-4 Example 3.2

Solution:

2. Determine the magnitude of the vertical force: For a pile cape 4.000m square, weight
of pile cap is:

4 x 4 x 22 x 4 = 462kN ⇒ vertical load = 462kN

2. Determine the location of the N.A. for the vertical piles:

3 . resultant of vertical load and horizontal load cuts the underside of the pile cup at a point
2.06m from N.A. pile group. This can be achieved graphically. E.g. On a millimetre paper, in
scale, draw the pile cup. Taking the top of the pile cup draw the vertical component downward
as shown in figure 2-3 then taking the tip of the vertical component as reference point draw
the horizontal component perpendicular to the vertical component. By joining the two
components establish the resultant force R. Measure the distance from the N.A to the cutting
point of R at the underside of the pile cup.

4. Using the following formula, calculate the load on each pile: