SOLUTION 5.1STEP1: Draw the dam to scale.EXAMPLE 5.11Next
Slide.
STEP1: Draw the dam to scale.2
STEP2: Identify the permeable and impermeable boundaries.AB and
EF are permeable: equipotential lines.BCIJDE and GH are
impermeable: flow lines.3
STEP6: Calculate the uplift force. Using Simpsons rule
(Eq.5.17):4
STEP7: Determine the pore water pressure distribution on the
sheet pile wall. Divide the front face of the wall into six
intervals of 7/6 = 1.17 m and the back face into one interval. Six
intervals were chosen because it is convenient for scaling using
the scale that was used to draw the flow net. The greater the
interval the greater the accuracy. Only one interval is used for
the back face of the wall because there are no equipotential lines
that meet there. Use a table or spreadsheet to compute the pore
water pressure distribution and the hydrostatic forces. Use
Simpsons rule to calculate the hydrostatic force on the front face
of the wall. The pore water pressure distribution at the back of
the wall is a trapezoid and the area is readily calculated. 5
6
EXAMPLE 4.1
EXAMPLE 4.2SOLUTION 4.2Step 1: Draw a diagram of the
problem.
