APPLICATION OF SOLMAXHDPE GEOMEMBRANE FROM HIGH-DENSITY POLYETHYLENE AT RESTORATION OF ANTIFILTRATION FACING OF IRRIGATED CHANNELS IN THE SOUTHERN REGION OF UKRAINE

Abstract

The article presents materials of researches of technical condition of concrete facing of Ingulets trunk channel, which functioned for 58 years, constructions and technologies of application of innovative anti-filtration coating – geomembrane SOLMAXHDPE from highdensity polyethylene, at restoration of anti-filtration facing of irrigation channels in the Southern region of Ukraine. The aim of the research was to establish the possibility of using a geomembrane made of high-density polyethylene in the restoration of anti- filtration lining of irrigation channel in the Southern region of Ukraine, on the example of Ingulets irrigation-fleoding. In 2013, the Ingulets Irrigation System (UCS) Canal Department repaired the emergency section of the Ingulets Trunk Channel with the use of modern polymeric materials, and made an anti-filtration screen made of HDPE geomembrane (high density polyethylene) Solmax 440- 70007, t = 1 mm). The technology of laying the geomembrane on the bottom and slopes of the Trunk Channel has been worked out. The geomembrane is laid on the leveled existing facing from monolithic concrete. The bottom of the channel was leveled with a layer of sand 10 cm thick. The screen of geomembrane in the upper part of the channel at a length of 127 m is fixed on the shoulders in the tooth, and the other 23 m of the screen with metal plates to monolithic concrete using dowels. At the bottom of the channel, the anti-filtration screen was loaded with reinforced concrete supports with a cross section of 300 mm x 200 mm, a narrower plane to the bottom. Geotextiles were used at the screen loading points to protect the geomembrane from mechanical damage. Anti-filtration screen made of HDPE geomembrane (high density polyethylene) Solmax 440- 70007, t = 1 mm), as shown by studies on the Ingulets Trunk Channel, provides a significant reduction in filtration losses and can be used in the construction and reconstruction of existing anti-filtration cladding, Yavkin, Tatarbunary irrigation systems, Northern-Channel canal and all other irrigation systems of the Southern region of Ukraine. Further ways of research are to determine the service life of the geomembrane, its reliability, efficiency and improvement of construction technologies of this anti-filtration coating – geomembrane, taking into account regional and technical features of irrigation channel of different types in the Southern region of Ukraine.