1
Question
Match List-I (Protective measure) with List-II (Purpose) and select the correct answer using the codes given below the lists:
List-I
A. Inverted filter
B. Riprap
C. Clay core
D. Sand columns
List-II
1. To protect river banks from erosion by river flow
2. To prevent escape of fine soils by seepage water
3. To reduce damage due to liquefaction of saturated granular soils during earthquakes
4. To reduce seepage of water through the body of the earth dams
Codes:
A B C D
Match List-I (Protective measure) with List-II (Purpose) and select the correct answer using the codes given below the lists:
List-I
A. Inverted filter
B. Riprap
C. Clay core
D. Sand columns
List-II
1. To protect river banks from erosion by river flow
2. To prevent escape of fine soils by seepage water
3. To reduce damage due to liquefaction of saturated granular soils during earthquakes
4. To reduce seepage of water through the body of the earth dams
Codes:
A B C D
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Solution
The correct option is D 2 1 4 3
(d)
Sand columns increase the permeability and therefore drainage of water occurs easily and faster. During earthquake conditions, the excess pore pressure will be quickly dissipated and thus liquefaction of sands can be reduced.
Riprap protect river banks from erosion.
(d)
Sand columns increase the permeability and therefore drainage of water occurs easily and faster. During earthquake conditions, the excess pore pressure will be quickly dissipated and thus liquefaction of sands can be reduced.
Riprap protect river banks from erosion.
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