Calculate the value of minimum base width for an elementary triangular concrete gravity dam supporting 72 m height of reservoir water and full uplift? (Take specific gravity of concrete as 2.4 and coefficient of friction as 0.7)

← Prev Question Next Question →

1 Answer

Related questions

+1 vote

1 answer

For triangular dam section of height H for just no tension under the action of water pressure, self-weight and uplift pressure, the minimum base width required is _____________

asked Nov 16, 2023 in Irrigation Engineering by Carter (75.2k points)

+1 vote

1 answer

The base width of a solid gravity dam is 35 m and the specific gravity of dam material is 2.45. What is the approximate allowable height of the dam having an elementary profile without considering the uplift?

asked Sep 25, 2023 in Irrigation Engineering by Carter (75.2k points)

+1 vote

1 answer

A concrete gravity dam having a maximum reservoir level at 200 m and the RL of the bottom of the dam 100 m. The maximum allowable compressive stress in concrete is 3000 KN/m^2 and the specific gravity of concrete is 2.4. Calculate the height of the dam and check whether it is a high dam or low dam.

asked Sep 25, 2023 in Irrigation Engineering by Carter (75.2k points)

+1 vote

1 answer

A low gravity dam of elementary profile made up of concrete of relative density 2.57 and safe allowable stress of foundation material 4.2 MPa. What is the maximum height of the dam without considering the uplift force?

asked Sep 5, 2023 in Irrigation Engineering by Carter (75.2k points)

+1 vote

1 answer

For usual values of permissible compressive stress and specific gravity of concrete, a high concrete gravity is the one whose height exceeds ______________

asked Nov 16, 2023 in Irrigation Engineering by Carter (75.2k points)

+1 vote

1 answer

The governing compressive stress in a concrete gravity dam which should not be allowed to exceed the permissible value of about 3000 KN/m^2 while analyzing full reservoir case is ____________________

asked Nov 9, 2023 in Irrigation Engineering by Carter (75.2k points)

+1 vote

1 answer

Calculate the top width of the dam if the height of water stored is 84m.

asked Sep 25, 2023 in Irrigation Engineering by Carter (75.2k points)

+1 vote

1 answer

What is the formula for limiting height of a gravity dam?

asked Sep 17, 2023 in Irrigation Engineering by Carter (75.2k points)

+1 vote

1 answer

Calculate the top width of the weir wall (B’) if the head of the water over the weir wall at the time of the maximum flood is 2 m. Take the specific gravity of the floor material as 2.4.

asked Aug 16, 2023 in Irrigation Engineering by Carter (75.2k points)

+1 vote

1 answer

When the reservoir is empty, the single force acting on it is the self-weight of the dam which acts at a distance of ____________

asked Sep 5, 2023 in Irrigation Engineering by Carter (75.2k points)

+1 vote

1 answer

What is the value of eccentricity for no tension condition in the dam?

asked Nov 16, 2023 in Irrigation Engineering by Carter (75.2k points)

+1 vote

1 answer

Calculate the effective unit tractive force that causes bed load transportation if the unit tractive force produced by the flowing water is 3.20 N/m^2. The Manning’s coefficient on an unrippled bed is 0.0108 and the actual observed value of Manning’s coefficient on ripped channels is 0.0222. Take the value of critical shear stress that is required to move the grain particle as 0.5 N/m^2.

asked Sep 16, 2023 in Irrigation Engineering by Carter (75.2k points)

+1 vote

1 answer

For full reservoir condition in a gravity dam, the critical combination of vertical and horizontal earthquake accelerations to be considered for checking the stability is ________________________

asked Sep 5, 2023 in Irrigation Engineering by Carter (75.2k points)

+1 vote

1 answer

The two-dimensional stability analysis of gravity dams proves better for U-shaped valleys than for V-shaped valleys.

asked Nov 16, 2023 in Irrigation Engineering by Carter (75.2k points)

+1 vote

1 answer

When the reservoir is empty, the maximum vertical stress equal to ________________

asked Nov 9, 2023 in Irrigation Engineering by Carter (75.2k points)

+1 vote

1 answer

The major principal stress at the toe of a gravity dam under full reservoir condition neglecting the tailwater effect is given by ____________________

asked Sep 5, 2023 in Irrigation Engineering by Carter (75.2k points)

+1 vote

1 answer

An ogee spillway of a concrete gravity dam having FRL of 328 m and MWL of 340 m is provided with vertical gates between piers erected on the spillway. The effective length of the spillway is 60 m. The discharge through the spillway when gates are opened up to the actual reservoir level of 331.0 m will be_____________

asked Nov 9, 2023 in Irrigation Engineering by Carter (75.2k points)

+1 vote

1 answer

If the eccentricity of the resultant falls outside the middle third, the ultimate failure of the dam occurs by ______________

asked Nov 16, 2023 in Irrigation Engineering by Carter (75.2k points)

+1 vote

1 answer

For a saddle siphon, the maximum operative head is 4.53 m. The width and height of the throat of the siphon are 5 m and 2.25 m respectively. The coefficient of discharge is 0.90. How many units are required to pass a flood of 350 cumecs? (Assume g = 10 m/s^2)

asked Sep 25, 2023 in Irrigation Engineering by Carter (75.2k points)

+1 vote

1 answer

The small openings made in the huge body of a concrete gravity dam such as sluices and inspection galleries can be assumed to be causing only local effects without any appreciable effect on the distribution of stresses as per the principle of_____________________

asked Nov 9, 2023 in Irrigation Engineering by Carter (75.2k points)

+1 vote

1 answer

The ordinate of the uplift pressure at a point is found to be 2.8 m while designing the downstream floor thickness of a weir. If the relative density of concrete is 2.4 then the minimum thickness of the floor to be provided for resisting uplift pressure without accounting safety factor is _______

asked Sep 5, 2023 in Irrigation Engineering by Carter (75.2k points)

+1 vote

1 answer

The horizontal joints that extends through the entire width of the dam section and are developed at each lift height is called as ___________________

asked Nov 9, 2023 in Irrigation Engineering by Carter (75.2k points)

+1 vote

1 answer

The vertical stress at the toe was found to be 3.44 MPa at the base of the gravity dam section. If the downstream face of the dam has a slope of 0.617 horizontal: 1 vertical, the maximum principal stress at the toe of the dam when there is no tailwater is _______________

asked Sep 5, 2023 in Irrigation Engineering by Carter (75.2k points)

+1 vote

1 answer

The buttresses of a free deck buttress dam are provided at ‘x’ m clear spacing and buttress thickness is proposed to be ‘t’ m. The buttress section can then be designed like the section of a concrete gravity dam by considering the effective unit weight of water = Surcharge factor (S) x actual unit weight of water. The value of this surcharge factor is given as _____________

asked Sep 25, 2023 in Irrigation Engineering by Carter (75.2k points)

+1 vote

1 answer

Calculate the value of free-board that should be provided for a reservoir having a wind velocity of 92 km/h and it extends up to 18 km upstream.

asked Sep 25, 2023 in Irrigation Engineering by Carter (75.2k points)

...