The article discusses the results of studies of new types of geocomposite materials used for anti-filtration and drainage purposes in hydraulic engineering and environmental protection construction. As the main elements, the presented geocomposite materials include various types of synthetic materials – bentonite mats and profiled geomembrane. A distinctive feature of these materials is the inclusion of additional elements of geotextile material or polymer geomembrane in their design, these elements are connected to the main element by thermal bonding. As a result, the combined geocomposite materials acquire new properties: they become more waterproof and durable. At the same time, waterproof materials are used for anti-filtration systems (as screens and coverings for canals, ponds, dams and various types of waste collectors), and previous material are used for drainage systems (as drainage in hydraulic and civil engineering). New types of geocomposite materials have improved properties on water resistance and water permeability (filtration coefficient), durability and strength.

The article deals with the «GP» geo-composite drainage material, which is used in hydro-technical, civil, as well as environmental, industrial and landscape construction. This material is intended for complex application, as a separating, filtering and reinforcing layer in the structures of protective dams on rivers, reservoirs, channels, an earth work of linear transport constructions (automobile and railway facilities) and other hydraulic engineering constructions. It is a combined geo-synthetic material, including a rigid geo-grid of the lattice structure and a filtering geotextile element. As a result of the carried out researches, its basic physical and mechanical characteristics have been established: tensile strength, surface density of geotextile and the material, relative elongation at maximum load, filtration coefficient normal to the material level.

The article reviews the results of studying modified geomembrane compositions for impervious surfaces, including polymeric geomembrane of fresh raw materials and geomembrane of recycled materials reinforced with protective “Dornit” type geotextile to prevent damage. The work suggests criteria of technical efficiency and reliability of geomembrane compositions, estimated correlations to define those indicators and presents theoretical approaches to assess the operational reliability of geomembrane compositions based on reliability theory methods.

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This article presents a classification of the main types of geo-composite materials used in hydraulic engineering construction for imperviousness and drainage purposes. The authors have proposed a dependence to estimate the service life of geo-composite coatings using the durability criterion, and a graph was drawn for the service life of the materials. The article shows estimation results for the reliability of geo-composites using the Bayes method.