Water flows at the rate of 4 x 10-2 cm³/s through a cylindrical sand sample with a diameter of 10 cm and a coefficient of permeability of 8 x 10-4 cm/s. In Case I, the flow is in upward direction, as shown in Figure 3a. In Case II, the flow is in downward direction, as shown in Figure 3b. For each case: a). The total head loss through the sand. b). The total stress, the effective stress and the PWP at points A, B and C if the soil has a saturated unit weight of 19 kN/m³.

Water flows at the rate of 4 x 10-2 cm³/s through a cylindrical sand sample with a diameter of 10 cm and a coefficient of permeability of 8 x 10-4 cm/s. In Case I, the flow is in upward direction, as shown in Figure 3a. In Case II, the flow is in downward direction, as shown in Figure 3b. For each case: a). The total head loss through the sand. b). The total stress, the effective stress and the PWP at points A, B and C if the soil has a saturated unit weight of 19 kN/m³.

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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Concept explainers

Principles of Seepage

In hydrology, when water flows down in a pore or crack of unsaturated soil due to gravity, the deep layer of soil is called seepage. It is the slow movement of water in the soil layer. Seepage is mainly found near hydraulic structures and is responsible for the stability of earthen-type hydraulic structures.

Question

Water flows at the rate of 4 x 10-2 cm³/s through a cylindrical sand sample with a
diameter of 10 cm and a coefficient of permeability of 8 x 10-4 cm/s. In Case I, the flow
is in upward direction, as shown in Figure 3a. In Case II, the flow is in downward
direction, as shown in Figure 3b.
For each case:
a). The total head loss through the sand.
b).
The total stress, the effective stress and the PWP at points A, B and C if the
soil has a saturated unit weight of 19 kN/m³.
a). Case I
9 cm
12 cm
12 cm
▼
C
B
A
D = 10 cm
9 cm
12 cm
12 cm
b). Case II
Figure 3. Seepage through soil
▼
с
B
A
?
D = 10 cm

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