Exam Details
| Subject | Earth And Rock Fill Dam Engineering | |
| Paper | ||
| Exam / Course | B.Tech Civi Engg. (BTCLEVI)/B.Tech Electronics And Communication Engg. (BTECVI) | |
| Department | School of Engineering & Technology (SOET) | |
| Organization | indira gandhi national open university | |
| Position | ||
| Exam Date | December, 2016 | |
| City, State | new delhi, |
Question Paper
What is the difference between an earth dam and a rockfill dam In what conditions, is a rockfill dam more suitable than an earth dam
What are the various types of earth dams according to the section of the dam What type of section is commonly used in practice and why?
2. Discuss the various causes of hydraulic and structural failures of earth dams.
Draw the typical cross-section of earth dams when:
Only pervious material is available
Only impervious material is available
Both pervious and impervious
materials are available
Write short notes on any two of the following:
Rock Toe
Consolidation of earth dams
Pore pressure and its significance in relation to earth dam construction
4. A homogeneous earth dam is 25 m high and has a crest width of 7 m. the U/S and d/s slopes are 4 1 and 3 1 respectively. Check the stability of U/S slope by the approximate method. Assume a free board of 3 m and the height of the phreatic line above the base· at the U/S shoulder as 19 m. Take saturated weight of soil =22 submerged weight of soil 12kN/m^3, specific weight of water =10 ep c =50 kN/m^2•
5. An earth dam made of a homogeneous material has the.following data Coefficient of permeability of the dam material= 5 x 10-4 cm/sec.
Level of top of the dam 200·0 m Level of deepest river bed =178.0m
H.F.L of reservoir 197·5 m
Width of top of the dam =4·5 m
Upstream slope 1
Downstream slope 1
Determine the phreatic line for this dam section and the discharge passing through the dam, if a horizontal filter of length equal to 25 m is provided inward from the downstream toe of the dam.
Describe the Swedish slip circle method for examining the stability of slopes of an earthen embankment.
Write short notes on any two of the following:
Design of filters
Protection of upstream slope
Protection, of downstream slope
7. Describe the construction details of Rolled-fill method for earth dams.
Explain and elaborate the importance of seepage through earth dams.
What do you understand by critical gradient? What will happen if the critical gradient is exceeded? What is Khosla's safe exit gradient?
Find out the pore pressure in a layer of soil due to continuous loading which results in decrease of volume by 4%. Assume initial porosity. 0·35 and saturation ratio 0·85. Henry's coefficient may be taken as 0·02 and the initial pressure in the soil pores as atmospheric.
What are the design considerations for a rockfill dam Discuss in brief.
How would you prevent piping failure in an earth dam?
10. Explain the following terms:
Pitching
Berms
Relief Walls
Cut-off
What are the various types of earth dams according to the section of the dam What type of section is commonly used in practice and why?
2. Discuss the various causes of hydraulic and structural failures of earth dams.
Draw the typical cross-section of earth dams when:
Only pervious material is available
Only impervious material is available
Both pervious and impervious
materials are available
Write short notes on any two of the following:
Rock Toe
Consolidation of earth dams
Pore pressure and its significance in relation to earth dam construction
4. A homogeneous earth dam is 25 m high and has a crest width of 7 m. the U/S and d/s slopes are 4 1 and 3 1 respectively. Check the stability of U/S slope by the approximate method. Assume a free board of 3 m and the height of the phreatic line above the base· at the U/S shoulder as 19 m. Take saturated weight of soil =22 submerged weight of soil 12kN/m^3, specific weight of water =10 ep c =50 kN/m^2•
5. An earth dam made of a homogeneous material has the.following data Coefficient of permeability of the dam material= 5 x 10-4 cm/sec.
Level of top of the dam 200·0 m Level of deepest river bed =178.0m
H.F.L of reservoir 197·5 m
Width of top of the dam =4·5 m
Upstream slope 1
Downstream slope 1
Determine the phreatic line for this dam section and the discharge passing through the dam, if a horizontal filter of length equal to 25 m is provided inward from the downstream toe of the dam.
Describe the Swedish slip circle method for examining the stability of slopes of an earthen embankment.
Write short notes on any two of the following:
Design of filters
Protection of upstream slope
Protection, of downstream slope
7. Describe the construction details of Rolled-fill method for earth dams.
Explain and elaborate the importance of seepage through earth dams.
What do you understand by critical gradient? What will happen if the critical gradient is exceeded? What is Khosla's safe exit gradient?
Find out the pore pressure in a layer of soil due to continuous loading which results in decrease of volume by 4%. Assume initial porosity. 0·35 and saturation ratio 0·85. Henry's coefficient may be taken as 0·02 and the initial pressure in the soil pores as atmospheric.
What are the design considerations for a rockfill dam Discuss in brief.
How would you prevent piping failure in an earth dam?
10. Explain the following terms:
Pitching
Berms
Relief Walls
Cut-off
Other Question Papers
Departments
- Centre for Corporate Education, Training & Consultancy (CCETC)
- Centre for Corporate Education, Training & Consultancy (CCETC)
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- School of Engineering & Technology (SOET)
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Subjects
- Advance Surveying
- Advanced Design Of Foundation
- Advanced Environmental Engineering
- Advanced Structural Analysis
- Bachelor Of Technology (Ce)
- Building Technology -I
- Civil Engineering
- Computational Methods In Structural Engineering
- Earth And Rock Fill Dam Engineering
- Elements of Engineering Science
- Engineering Geology
- E n v i r o n m e n t a l E n g i n e e r i n g I I
- Environmental Engineering-I
- Estimation And Construction Management
- Geoinformatics
- Geotechnical Engineering - II
- Mathematics-III
- Pavement Evaluation
- Quantity Surveying and Costing
- Reliability And Optimization Of Structures
- Structural Analysis - II
- Structural Analysis - III
- Structural Analysis I
- Structural Design And Drawing - I
- Structural Design And Drawing - II
- Surveying
- Traffic Engineering
- Transportation Engg. II
- Transportation Engineering - I
- Transportation Planning
- Water Resources Engineering
- Water Resources System Planning And Design