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PPT: Seepage in Soils | Soil Mechanics - Civil Engineering (CE) PDF Download

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1
Seepage
Page 2


1
Seepage
2
One-dimensional flow
Discharge = Q = v. A = k . i . A= k (h/L). A
Page 3


1
Seepage
2
One-dimensional flow
Discharge = Q = v. A = k . i . A= k (h/L). A
Water In
h =h
A
-h
B
Head Loss or
Head Difference
or Energy Loss
h
A
h
B
i = Hydraulic Gradient
(q)
Water
out
Z
A
Datum
Z
B
One-dimensional flow
Page 4


1
Seepage
2
One-dimensional flow
Discharge = Q = v. A = k . i . A= k (h/L). A
Water In
h =h
A
-h
B
Head Loss or
Head Difference
or Energy Loss
h
A
h
B
i = Hydraulic Gradient
(q)
Water
out
Z
A
Datum
Z
B
One-dimensional flow
4
Two-dimensional flow
Page 5


1
Seepage
2
One-dimensional flow
Discharge = Q = v. A = k . i . A= k (h/L). A
Water In
h =h
A
-h
B
Head Loss or
Head Difference
or Energy Loss
h
A
h
B
i = Hydraulic Gradient
(q)
Water
out
Z
A
Datum
Z
B
One-dimensional flow
4
Two-dimensional flow
5
Two-dimensional flow
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FAQs on PPT: Seepage in Soils - Soil Mechanics - Civil Engineering (CE)

1. What is seepage in soils?
Ans. Seepage in soils refers to the movement of water through the pore spaces of soil. It occurs when water infiltrates the soil surface and percolates down, driven by the force of gravity.
2. What factors influence seepage in soils?
Ans. Several factors can influence seepage in soils, including the permeability of the soil, the hydraulic gradient (the change in hydraulic head over a given distance), the type and arrangement of soil particles, and the presence of any barriers or confining layers that can impede or redirect the flow of water.
3. What are the potential consequences of seepage in soils?
Ans. Seepage in soils can lead to various consequences, such as soil erosion, slope instability, foundation settlement, and groundwater contamination. It is crucial to understand and manage seepage to prevent these potential issues.
4. How can seepage in soils be controlled or mitigated?
Ans. There are several methods to control or mitigate seepage in soils, depending on the specific situation. Some common approaches include installing drainage systems, using impermeable barriers or liners, implementing proper soil compaction and consolidation techniques, and employing appropriate slope stabilization measures.
5. What are some common tests used to evaluate seepage characteristics in soils?
Ans. Various laboratory and field tests are used to evaluate seepage characteristics in soils. Some common tests include the constant head permeability test, falling head permeability test, sieve analysis to determine soil particle size distribution, and compacted soil permeability tests such as the constant head or falling head permeability test on compacted soil samples. These tests help engineers assess the soil's permeability and determine its potential for seepage.
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