Analysis of deformation and calculations of the stability of the embankment of the Petrovsky stadium

Abstract

The stadium of federal significance, Petrovsky, is located in an area whose development began in 1710, which predetermined a high degree of contamination of the cut and a significant transformation of the composition of the pound water, as well as the condition and properties of the rocks. The main source of pollution is leaks from the sewage and stormwater systems. Studies have shown that the Quaternary sediments are the most transformed, which are characterized by a high degree of microbiological contamination. In July 2000. SPGGI conducted a specialized engineering-geological survey of the Petrovsky Stadium embankment. This made it possible to identify several characteristic types of embankment destruction: the formation of failures and displacement of the lower part of the banquet, changes in the outline of the cross profile of the masonry, the fall out and displacement of the facing stones, displacement of the sidewalk slabs, failures and cracks in the asphalt pavement and the formation of landslide cirques. Embankment landslide displacements are formed under the influence of the following factors: the presence of weak lake-glacial sediments in the section, characterized by quasiplastic state and the value of coupling 0.009 MPa at zero internal friction angle, the effect of hydrodynamic pressure, groundwater and additional loads, and the gradual deterioration of sand-clay rock strength when microbiological activity is activated. The factors that determine the development of landslide processes and, accordingly, deformations of the embankment and adjacent territory, established in the process of research, show that the existing embankment design has long ago exhausted its operational capabilities and does not guarantee the stability of the slopes. In this regard, the question of complete replacement of the embankment structure with a fundamentally new one, meeting the engineering and geological conditions of the territory under consideration should be considered.