Overflowing phreatic dams built with the use of modern composite materials

Samara State Technical University, Institute of Architecture and Civil Engineering, Molodogvardeyskaya Str. 194, 443001 Samara, Russia

^* Corresponding author: andremixas@mail.ru

Abstract

Costs and terms of hydroelectric complexes construction, of low pressure constructions in particular, can be significantly reduced by ensuring the safe passage of flood discharge through the crest of water-retaining structures. When water-retaining structures are made from soils, this condition can only be fulfilled by creating special fastenings of a crest and dam slopes from erosion. There is a large number of technical solutions for overflowing phreatic dams construction with the use of stone, concrete, reinforced concrete and metal. However, most of them have specific disadvantages. They are high materials consumption, labour input and expenses. These disadvantages, in our opinion, can be minimized by applying modern composite materials such as geosynthetic shells, concrete-filled textile floor-floor-mats and coarse-pored concrete. The paper describes structures of overflowing phreatic dams invented by the authors with the use of modern composite materials, as well as the results of model hydraulic studies of overflowing phreatic dams with a downstream slopes formed by geosynthetic shells.