ABSTRACT
Basic results of geotechnical monitoring at construction of skyscraper “Lakhta-Center” are presented. Pit fencing displacements while constructing under-ground part of building are considered, effectiveness of excavating pit of regular shape in plan is shown: operations in open pit. Measurements of building settlements are given based on extensometer system witnessing possibility of minimum settlements of high-rise building at pile driving to Venda deposits which opens prospective of high-rise construction in geotechnical conditions of Saint-Petersburg. Pore pressure gauge measurement results show no excessive pore pressure in subsoil, expectedly, due to solid consistency of pre-quaternary clayey soils. Gauges are reported to record water head within permeable fractured-block structure of Venda clays and overlaying soils. Measurements by system of sensors located in piled raft stated that pressure is not transferred to soil via piled raft base, i.e. pile-raft foundation effect is not manifested in unevenly compressible subsoil – all load it applied to piles.
