Implementation of construction water reduction in areas with difficult hydrogeological condi-tions

Urbanized areas are an example of a powerful and unbalanced impact on the geological environment of technogenic factors that disrupt the hydrogeological and geoecological conditions of the territory. In built-up areas, changes in the conditions for the formation of surface and groundwater runoff are observed, the nature of the hydraulic connection of surface and groundwater, as well as aquifers between themselves, is disrupted. When performing work on the construction of buried structures and the arrangement of excavations, the engineering and geological hydrogeological conditions of the construction site should be taken into account. The construction of foundations on piles, tunnels, and underground parking lots in most cases leads to the barrage of the flow of groundwater, and as a result, to flooding. The underground space of a modern city is saturated with water-bearing communications that have unpredictable leaks. Water leaks from communications cause a significant rise in groundwater levels in the upper aquifer, which are random and difficult to predict. Design and construction of new buildings and structures of increased responsibility in difficult engineering and geological conditions and in conditions of dense development requires additional measures that should ensure the possibility of safe execution of construction work, limit the impact on surrounding structures and networks and protect new buildings and surrounding development from the manifestation of dangerous engineering and geological processes. The article considers the option of arranging a pit during the reconstruction of a sewer collector D=2280 mm in Kyiv on the left bank of the Dnieper River. Currently, the performance of such work is not regulated by current modern regulatory documents in force in Ukraine. The standards that were developed during the USSR are used, but they are currently in force in our country [1, 2]/ Based on the above, when designing and constructing facilities, a set of measures should be provided for protection against the impact of groundwater on the construction and operational periods.