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Purpose: analysis of the bank protection structures operation with substantiation of soil-reinforced and soil-filled structures use for the conditions of small rivers and watercourses of hydrographic network.  Materials and methods. New technical solutions and technologies for the construction of shell soil-filled and soil-reinforced structures, which provide a minimum impact on the catchment area of small rivers are proposed. The soil-filled shells filled with bottom sediments are proposed as the base of bank protection structures.  Results. Analytical and numerical methods for determining the stress-strain state are given, taking into account the properties of geosynthetic shell material of a soil-filled structure in the software module Ansys Mechanical APDL, on the basis of which a simulation model of a new technical and technological solution of a bank protection structure is developed, which allows to reduce scope of work in preparing and developing the foundation. The use of laboratory equipment for physical modeling of bank protection soil-reinforced structures on a soil-filled foundation, including an installation for testing composite materials of a soil-filled shell and the stress-strain state of a soil-reinforced massif is considered.  Conclusions. The planned research will make it possible to develop a technology of bank protection structures construction, both in cluttered urban environment and on the territory of environmental facilities. Based on the results of numerical modeling of soil-filled shells with the application of geotubes, the conditions for their stability as the foundation of a bank protection soil-reinforced structure were preliminarily determined. It is proposed to use a sheet pile wall at slopes of bedrock more than 10° to ensure the stability of the base shell. Laboratory stands to test the soil-filled shell-bases and the front wall of the bank protection structure have been developed.

SUBSTANTIATION OF SOIL-REINFORCED AND SOIL-FILLED STRUCTURES OF BANK PROTECTION STRUCTURES FOR THE CONDITIONS OF SMALL RIVERS