Abstract
Purpose. Substantiating of the choice of components of materials and methods of obtaining a soil-cement element for strengthening the ground bases in Ukraine, taking into account the European experience. Methodology. The concepts of embankment reinforcement developed and implemented in Ukraine and the European union using horizontal reinforcement (geosynthetic materials), vertical reinforcement (vertical piles or micropiles) and a combination of geosynthetic materials with piles are analyzed. Advantages and disadvantages of physic-chemical and mechanical strengthening methods are considered. Findings. The substantiation of the material and constituent components of soil-cement elements and methods of their creation for strengthening the embankment of railways was carried out. One of the effective directions for obtaining vertical reinforcing elements and reducing the cost of work on strengthening and strengthening the embankment is the use of a mixture of soil with the addition of cement, obtained by drilling mixing technology. To modify the structure of soil cement and minimize cement consumption, it is suggested to use fiber fibers, chemical additives and finely dispersed industrial waste in the form of ash or ground slag as reinforcing components. A study was conducted to establish the basic parameters of the soil-cement composition for further modification of the structure of the element under the specific situational conditions of the embankment. Originality. The originality of the work is that, for the first time, based on the strengthening experience, the justification of the directions of strengthening the ground bases with vertical soil-cement elements at different stress-deformation conditions of the soil foundations and the composition of vertical elements in Ukraine and the European union was performed. Practical value. The practical value of the presented research is that when choosing one or another method of strengthening soil bases, the appropriate composition of the strengthening material is selected, that is, its efficiency and rationality can be determined during implementation in the specific conditions of operation of the railway, the embankment of which needs to be strengthened or rearranged for a combined or European track.
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