REDUCTION OF THE BARRAGE EFFECT FROM BURIED STRUCTURES IN COMPLEX TOPOGRAPHICAL AND ENGINEERING-HYDROGEOLOGICAL CONDITIONS

Abstract

The article presents the results of the authors’ research on ensuring slope stability and reducing the barrage effect as a result of the construction of a residential building with social facilities and underground parking with the installation of a deep pit and a fence securing its walls. To reduce the impact of buildings on changing the hydrogeological regime in the territory adjacent to the construction site, two options for drainage and drainage systems were considered, which take into account design decisions for development, the general plan and vertical planning. The first option involves the installation of a drainage and drainage system consisting of a layer drainage in combination with water collection wells, and the second option is a drainage and drainage system that includes a layer drainage in combination with drainage geomembranes.Modeling of groundwater filtration in the area of influence of structures, which was performed using the Kust software package for PCs, showed that the increase in aquifer levels under the influence of anti-sliding walls, excavation fences and pile  foundations during infiltration with a security factor of 0.95 will be 0.8–1.52 m.When arranging drainage according to option 1, the increase in the groundwater level within the influence of the construction decreases to 0.05–0.1 m, and according to option 2 – to 0.1–0.15 m, which is close to the natural groundwater level.