Field Studies of the Stressed State of the «soil base – combined pile raft foundation» System of the Multifunctional Complex in Kharkiv City

In the projects of buildings and structures, in last two to twenty-five years, world practice, so-called combined pile raft foundation (CPRF) is increasingly used, for which, design calculations, it assumed that calculated load from building distributed between piles raft, allowing up 50% inclusion work (resistance) raft. As part scientific technical support [1-8] construction object, instrumental automated monitoring stress state «soil - foundation» system multifunctional complex on St. Pushkinska, 2 Kharkiv (Ukraine) carried out. The has 7 floors a mezzanine floor, including underground parking, 5 shopping entertainment area. There parking lot first floors. monolithic reinforced concrete frame with beamless floor slabs. centering bored under load-bearing elements frame. soil base represented by Quaternary alluvial-deluvial sediments – loams, sands clays. implementation project, 23 sensors types were installed during zero-cycle works: strain gauges (Geosense, England) determine stresses shafts upper lower grids reinforcement pressure (Geokon, USA), which placed sole results showed actual does not exceed its own weight (≈25kN/m2), indicates absence due insignificant relative settlements foundation. Taking this fact into account when modeling "base structure" calculation SOFiSTiK qualitative quantitative convergence effort values structures