Limiting Height of Elementary Profile

Q. The maximum height of a low gravity dam of elementary profile made of concrete of relative density 2.5 and safe allowable stress of foundation material 3.87 MPa without considering uplift force is about

1. 113 m
2. 217 m
3. 279 m
4. 325 m

Q. The specific weight of material used for the construction of a gravity dam is $24.5kN/m^3$. Uplift pressure acting on the dam is assumed to vary linearly from full hydrostatic head at heel to zero at toe of the dam. If the safe allowable pressure on the dam is 7.2 MPA, limiting height of the dam will be?

1. 230 m
2. 290 m
3. 170 m
4. 330 m

Q. The base width of a gravity dam is 30 m of material having a specific gravity of 2.65. The dam is designed as an elementary profile with 80% uplift. The allowable compressive stress of dam material is 2800 $kN/m^2$. The allowable height of the dam will be _______

1. 40 m
2. 60 m
3. 80 m
4. 100 m

Q. The safe allowable stress on the foundation of a gravity dam is $8N/m{m}^2$. If the specific gravity of the dam material is 2.38, the limiting height of the gravity dam will be?

1. 235 m
2. 186 m
3. 262 m
4. 157 m

Q. The maximum height of a gravity dam of elementary profile to be built by concrete of relative density = 2.4, on a foundation material of safe allowable stress = 7.5 MPa, by ignoring the uplift force is

1. 319 m
2. 484 m
3. 125 m
4. 225 m

Q. A gravity dam of elementary profile is made of concrete of specific gravity 2.5. The safe allowable stress of foundation material 3.87 MPa. If uplift is acting linearly at the bottom of the dam, limiting height of the gravity dam will be

1. 225 m
2. 113 m
3. 263 m
4. 158 m