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Which of the following attempts are made to reduce the uplift in order to economize on the provided section of a concrete gravity dam? i. Providing drainage gallery to collect seepage water ii. Constructing cut-off under upstream face iii. Pressure grouting in dam foundation iv. Provision of shear keys or keyways

Which of the following attempts are made to reduce the uplift in order to economize on the provided section of a concrete gravity dam? i. Providing drainage gallery to collect seepage water ii. Constructing cut-off under upstream face iii. Pressure grouting in dam foundation iv. Provision of shear keys or keyways Correct Answer i, ii and iii

In a gravity dam, the grout curtain is provided near the toe to reduce the exit gradient. A drainage gallery with its drainage pipe system provided in gravity dam reduces the uplift pressure at all levels below the upstream water level. Vertical cut-off walls are the most effective to reduce seepage flow and uplift force.

Related Questions

Consider the following statements related to uplift pressure in gravity dams: 1. A drainage gallery reduces the uplift pressure at all levels below the gallery. 2. A drainage gallery below upstream water level reduces the uplift pressure at all levels below the upstream water level. 3. A grout curtain near the heel reduces seepage and uplift pressure everywhere on the gravity dam whatever the upstream water level. Which of the above statements are correct?
Consider the following statements in respect of dams: 1. In a gravity dam, a grout curtain is provided near the toe to reduce the exit gradient. 2. A drainage gallery with its drainage pipe system provided in a gravity dam reduces the uplift pressure at all levels below the upstream water level. 3. An earthquake acceleration of 0.1 g acting vertically downward causes a decrease of 10% in the limit weight of concrete and of water in a gravity dam. 4. The Tehri dam is a gravity dam. Which of the above statements are correct?
The uplift pressure on a dam can be controlled byi) constructing cutoff under upstream faceii) constructing drainage channels bet-ween the dam and its foundationiii) by pressure grouting in foundationThe corret answer is
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/m2 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.
An art gallery engages a security guard to ensure that the items displayed are protected. The diagram below represents the plan of the gallery where the boundary walls are opaque. The location the security guard posted is identified such that all the inner space (shaded region in the plan) of the gallery is within the line of sight of the security guard. If the security guard does not move around the posted location and has a 360° view, which one of the following correctly represents the set of ALL possible locations among the locations P, Q, R and S, where the security guard can be posted to watch over the entire inner space of the gallery.
Mr. Murugan from Chennai experienced the comfort of Limo during his visit to China. He was willing to deposit an approximate price of Limo to buy the first available unit from Mr. Ahmed, a dealer in Chennai, known for fair dealing. Ginger Automobile is yet to announce the actual price, and the process for allocation of the vehicles. In order to maximise his cash flow, Mr. Ahmed should 1. collect the amount from Mr. Murugan. Later when the delivery is delayed, blame it on PAC's problems. 2. collect 50% as advance and the remaining 50% after the confirmation of launch date by Ginger Automobiles. 3. collect the amount Mr. Murugan is willing to deposit after clarifying that delivery is subject to the company policy. 4. not collect the amount, but suggest to Mr. Murugan to write to Ginger Automobiles. 5. collect the amount and transfer it to the account of Ginger Automobiles, instead of keeping it in his personal account.
6 faces of a cube is painted with different colour. Red face is opposite to the black face. The face adjacent to the bottom face is white. Brown face is adjacent to blue face. Red face is at the bottom. Which face will be on exactly opposite to the brown face.
The safety of a hydraulic structure founded on a pervious foundation can be ensured by: i. Provision sufficient length of its concrete floor. ii. Providing sufficient depth of its concrete floor. iii. Provision a downstream cutoff of some reasonable depth.
A, B, C, D, E and F are six girls who use 6 different face wash – Pond’s, Lakme, Lotus, Garnier, Himalaya and Kaya (but not necessarily in the same order). They also like six different colours – Red, Blue, Brown, Peach, Black and White (also not necessarily in the same order. A and C do not like a Red colour. The girl who uses Lakme face wash likes Peach colour. The girl who likes White colour does not use Kaya nor Lotus face wash. B neither likes Peach nor Red colour. D does not like a Blue colour but uses a Lotus face wash. The girl who uses Pond’s face wash likes Red colour. C does not use Lakme face wash nor likes white colour. F neither uses Himalaya nor Kaya face wash but likes Brown colour. Who does use Himalaya’s face wash?
In order to reduce uplift on a gravity dam, the type of grouting done is ____________________