COASTAL ENGINEERING - Introduction to Soft Soil Geotechnique: Content, Context and Application - page 291

structure. Determine the pressure directly behind the sheet piling under the dam in
kPa. Determine the horizontal force in KN on the sheet piling per m width.

3m 3m 3 m 3 m

35m 35m 35 m 35 m 10m 10m 10 m 10 m

13m 13m 13 m 13 m

17m 17m 17 m 17 m

2m 2m 2 m 2 m

10 m 10 m

Figure 16.23

application 16.3
A cofferdam is constructed on a permeable cutting underlain by rigid rock (Fig
16.24). A row of sheet piles is installed at the up and down stream face, connected
by an anchor. The permeability of the sand is 140 m/day. The unit weight of the
water is 10 kN/m 3 . Determine the total discharge Q in m 3 /hr through the structure.
Determine the pressure at position B outside and inside the cofferdam, in kPa.
Determine the part of the anchor force produced by the water pressure.

7 m 7 m

5m 5m

a nchor anchor

0 m 0 m

B B

Figure 16.24

application 16.4
An example of the application of the classic filter rules is shown (Fig 16.25). For
several types of granular materials (SA: sand, GR: sea gravel, QW: quarry waste 0
- 2 kg stone, QR: quarry run 2 - 300 kg stone, FI: filter 1 - 3 ton, AM: concrete