Geotechnical Engineering

The Swedish Slip Circle Method

Question 1
Marks : +2 | -2
Pass Ratio : 25%
The pore water pressure at any point on the slip surface is represented by ____________
Piezometric head
Pore pressure
Factor of safety
Failure plane
Explanation:
The pore water pressure at any point is represented by the piezometric head hw at that point.
Question 2
Marks : +2 | -2
Pass Ratio : 25%
The magnitude and distribution of pore water pressure on a slip surface can be calculated from ___________
Pressure net
Test data
Graphical method
Rectangular plot method
Explanation:
The magnitude and distribution of pore water pressure on a likely slip surface is estimated from pressure net which are developed from the flow net.
Question 3
Marks : +2 | -2
Pass Ratio : 25%
The slip circle having the minimum factor of safety is called ___________
Critical circle
Failure slip circle
Critical slip circle
None of the mentioned
Explanation:
A number of trial critical slip circle are chosen against sliding and factor of safety of each is computed. The circle having the minimum factor of safety is the critical slip circle.
Question 4
Marks : +2 | -2
Pass Ratio : 25%
Rectangular plot method has been suggested by _________
Culmann
Bishop
Singh
Terzaghi
Explanation:
A simplified rectangular plot method for finding the stability of slopes was suggested by Singh in 1962.
Question 5
Marks : +2 | -2
Pass Ratio : 25%
The area of U-diagram in finding stability of D/S slope during steady seepage, can be measured by ___________
Planimeter and Rectangular plot method
Fellinious method
None of the mentioned
All of the mentioned
Explanation:
The area of U-diagram can be measured with the help of a planimeter, or else the rectangular plot method can be utilized.
Question 6
Marks : +2 | -2
Pass Ratio : 25%
In Swedish circle method ___________ analysis cases are considered.
φC = 0
C – φ and φu = 0
None of the mentioned
All of the mentioned
Explanation:
In Swedish slip circle method two cases are considered: i) analysis of purely cohesive soil (φu = 0) and ii) analysis of a soil possessing both cohesion and friction (C-φ analysis).
Question 7
Marks : +2 | -2
Pass Ratio : 25%
When a dam is built of impervious compressible soil, water is entrapped in the pore space due to ___________
Excessive pore pressure
Volume change in the soil mass
Low shear strength of soil
Unstable soil mass
Explanation:
When a dam is built of relatively impervious compressible soil, excess pore pressure develops in the air and water entrapped in the pore pressure. This is because the soil mass undergoes a change in the soil due to compaction of the dam construction and also due to a down weight.
Question 8
Marks : +2 | -2
Pass Ratio : 25%
Stability of slopes of an earth dam is tested under, which of the following condition?
Stability of downstream slope during steady seepage and Stability of upstream slope during a sudden drawdown
Stability of upstream slope during sudden seepage
None of the mentioned
All of the mentioned
Explanation:
The stability of slopes of an earth dam is tested under the following conditions:
Question 9
Marks : +2 | -2
Pass Ratio : 25%
In the rectangular plot method if there are n-slices, the total number of ordinates will be ____________
n – 1
n
n – 2
None of the mentioned
Explanation:
In the rectangular plot method if there are n-slices, the total number of ordinates will be (n-1), the ordinates at the end of the last strip being zero.
Question 10
Marks : +2 | -2
Pass Ratio : 25%
When does the critical condition of d/s slope, occur in reservoir?
Reservoir is full
Pore pressure is high
Steady seepage does not occur
All of the mentioned
Explanation:
Critical condition of d/s slope occurs when the reservoir is full and percolation is at its maximum rate.