In this article we will discuss about:- 1. Meaning of Phreatic Line 2. Derivation of Phreatic Line with Filter 3. Phreatic Line in Earthen Dam without Filter 4. Properties. Meaning of Phreatic Line: Phreatic line is also known as the seepage line or saturation line. It is defined as an imaginary line within the dam section, below which there is [...]
An earthen dam may be failed in the following three ways: 1. Hydraulic Failures 2. Seepage Type Failures 3. Structural Failures. 1. Hydraulic Failures: As per various reports the hydraulic failures of earthen dam varies upto 40%. This type of failure generally takes place in the following ways: i. Overtopping of the dam height. ii. Wave action towards u/s side [...]
An earthen dam usually fails due to sliding of large soil mass from a curved surface. From several investigations, it has been concluded that the sliding of curved surface takes place along its slip surface, which is normally close to the cylindrical shape, i.e. when cross section is in the form of arc. There have been developed various methods for [...]