Podcast
Questions and Answers
Which type of retaining wall is most universally adopted for retaining earth in embankments for highways, hydraulic structures, irrigation, and marine applications?
Which type of retaining wall is most universally adopted for retaining earth in embankments for highways, hydraulic structures, irrigation, and marine applications?
- Cantilever (correct)
- Buttressed
- Anchored
- Gravity
What is the formula to calculate the coefficient of passive earth pressure ($C_p$)?
What is the formula to calculate the coefficient of passive earth pressure ($C_p$)?
- $\frac{(1 + \sin\theta) \times (1 - \sin\theta)}{(1 - \sin\theta \times (1 + \sin\theta))}$
- $\frac{(1 - \sin\theta)}{(1 + \sin\theta)}$
- $\frac{(1 - \sin\theta) \times (1 + \sin\theta)}{(1-\sin\theta)}$
- $\frac{(1 + \sin\theta)}{(1 - \sin\theta)}$ (correct)
What is the minimum factor of safety against sliding that is typically required for a retaining wall?
What is the minimum factor of safety against sliding that is typically required for a retaining wall?
- 1.5
- 1.2
- 1.4 (correct)
- 1.3
What is the recommended minimum thickness at the top of the stem in a cantilever retaining wall?
What is the recommended minimum thickness at the top of the stem in a cantilever retaining wall?
What force is a shear key, positioned below the base slab of a cantilever retaining wall, designed to primarily resist?
What force is a shear key, positioned below the base slab of a cantilever retaining wall, designed to primarily resist?
For a span's center face in a concrete structure, under what bending moment condition does tensile stress occur on the outer face?
For a span's center face in a concrete structure, under what bending moment condition does tensile stress occur on the outer face?
What is the permissible tensile stress due to bending for steel at the water face in a water tank?
What is the permissible tensile stress due to bending for steel at the water face in a water tank?
What minimum thickness should be provided to accommodate 2 layers of reinforcement in concrete water tanks?
What minimum thickness should be provided to accommodate 2 layers of reinforcement in concrete water tanks?
Determine the diameter (D) of a circular water tank with a depth of 4 meters and a capacity of 500,000 liters.
Determine the diameter (D) of a circular water tank with a depth of 4 meters and a capacity of 500,000 liters.
What is the bending moment for the long wall of a rectangular water tank?
What is the bending moment for the long wall of a rectangular water tank?
Flashcards
Cantilever Retaining Wall
Cantilever Retaining Wall
A retaining wall universally adopted to retain earth in embankments.
Cp = {(1+sinq)/(1-sinq)}
Cp = {(1+sinq)/(1-sinq)}
Coefficient of passive earth pressure.
Factor of Safety against Sliding
Factor of Safety against Sliding
Value the factor of safety against sliding must be greater than or equal to.
Stem Thickness
Stem Thickness
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Shear Key Function
Shear Key Function
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Bending Moment Equation
Bending Moment Equation
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Tensile Stress Value
Tensile Stress Value
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Water Tank Reinforcement Thickness
Water Tank Reinforcement Thickness
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tank diameter
tank diameter
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Bending Moment Equation
Bending Moment Equation
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Study Notes
- The Surprise Quiz-I covers topics from the Design of Reinforced Concrete and Steel Structures course.
- It addresses Course Outcome 1 (CO1) and Course Outcome 2 (CO2).
- CO1 focuses on recalling concepts and design methodologies for RC and steel structures as per IS Codal Provisions.
- CO2 involves comparing retaining structures and illustrating the design and detailing of retaining walls and water tanks.
Retaining Walls
- Cantilever retaining walls are universally adopted to retain earth in various situations like highways, hydraulic, irrigation, and marine structures.
- A shear key below the base slab of a cantilever retaining wall should be designed to resist passive earth pressure.
- Minimum thickness at the top of the stem in a cantilever retaining wall should be 150mm.
Earth Pressure
- The coefficient of passive earth pressure is given by the relation Cp = {(1+sinq)(1-sinq)}.
Stability
- The factor of safety against sliding should be greater than or equal to 1.4.
Tensile Stress
- Tensile stresses due to bending steel at the water face is 100 N/mm².
Water Tanks
- A thickness of 225 mm requires providing 2 layers of reinforcement in water tanks.
- The diameter of a water tank with a depth of 4m and a capacity of 500000 liters is 12.6 m.
- The bending moment at the center of the span producing tension on the outer face is ((pB²/16)).
- The bending moment of a rectangular water tank for a long wall is (wH³/6).
Cognitive Levels
- The quiz includes questions that test remembering (R) and understanding (U).
- 60% of the questions are at the remember level, while 40% are at the understand level.
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