Assessment of the damming effect during the underground constructions

Damming effect- rising groundwater levels in front of the closure downstream and decline, due to overlap of the filtration flow of groundwater. Depending on the hydrogeological characteristics of the overlapped water-bearing layer and the dimensions of the engineering structure, the amount of backwater can vary from a few centimeters to meters and can lead to deformations in the soil body, flooding of adjacent territories and nearby buildings and structures, and other adverse effect. In many cities of our country located mainly in the plains, the issue subsoil waterlogging is topical. Most of the soil body is composed of breed of sedimentary origin, mainly of Quaternary age: sand, sand clay, loam and clay. Most of the cities are flooded area associated with these soils. In this article described some basic principle of the estimation of the damming effect in the exhibition of underground constructions.