Which construction is suitable for dam?
Silt or fine sand foundations can be suitable for construction of earthfill dams, and even, in exceptional cases, for very small concrete gravity dams provided strict precautions are taken.
What are the methods of construction of earthen dams?
There are two methods of constructing earthen dams: (1) Hydraulic-fill Method; and (2) Rolled-fill Method. (2) Rolled-fill Method. (1) Hydraulic-fill Method. In this method of construction, the dam body is constructed by excavating and transporting soils by using water.
Which is a type of dam based on material?
Types of dams on the basis of materials used in dam construction: Rigid Dams (Concrete dams, steel dams, timber dams etc) Non-Rigid dams (rockfill dams)
Which shaped valley is suitable for construction of arch dam?
V-shaped valley
Explanation: The choice of an arch dam is suggested for a narrow V-shaped valley. A separate site for the spillway must also be available and it is generally preferred to have the top width of the valley less than 1/4 of its height. 3. Which of the following foundations are suitable for earthen and rock-fill dams?
Which type of dam is earthen dam?
Types. Embankment dams come in two types: the earth-filled dam (also called an earthen dam or terrain dam) made of compacted earth, and the rock-filled dam. A cross-section of an embankment dam shows a shape like a bank, or hill.
What is the difference between a weir and a barrage?
A weir is an impermeable barrier that is built across a river to raise the water level on the upstream side. On the other hand, a barrage involves adjustable gates installed over a dam to maintain the water surface at different levels and at different times.
Who constructed Tehri Dam?
Tehri Hydro Development Corporation (THDC)
Construction and operation of dam & power house was taken up by Tehri Hydro Development Corporation (THDC) and was commissioned in 2006.
On which river Tehri Dam is constructed?
Bhagirathi River
The Tehri dam, a 260.5 m-high earth and rockfill dam, impounds water 44 km along Bhagirathi River and 25 km along Bhilangana River, creating a dead storage of 925 Mm3 and live storage of 2,615 Mm3, making a total storage capacity of 3,540 Mm3. Impoundment commenced in 2005.
What are the different types of dams Class 10?
Based on structure or material used, dams are classified as timber dams, embankment dams or masonry dams, with several sub-types. According to the height dams can be categories as large dams and major dams or alternatively as low dams, medium height dams and high dams.
Which type of dam is stronger?
Arch dam
Hence, Arch dam is the dam which requires strongest abutment as canyon wall bears its most of the load. In gravity dam there is no requirement of the abutment as it resists the entire load with its own weight. While in Buttress dam, only some percentage of load is transferred through end buttresses acting as abutments.
What are the different methods of construction of dam?
(1) Hydraulic-fill Method. In this method of construction, the dam body is constructed by excavating and transporting soils by using water. Pipes called flumes, are laid along the outer edge of the embankment. The soil materials are mixed with water and pumped into these flumes.
What are the different types of masonry dams?
Masonry dams are built using either stone masonry or brick masonry. Cement mortar is used to join the masonry blocks. Gravity dam, arch dam etc. are examples of masonry dams. 2. Concrete Dam
What type of rock is used to build dams?
Rock fill dams are built of coarse rock, which provides structural stability, with a concrete membrane on the upstream slope as a water barrier. Methods of construction of Earth Dam.
How are dam molds made?
The mould is not made to the full height of the dam, as the dam is built upwards in stages of about 1 to 2 metres at a time. The concrete is left to dry before the next section is formed on top. The concrete can be transferred from the batching plant to the dam by a number of methods.