Investigation of hard soils for soil-structure interaction analyses

摘要

Due to increasing height of buildings and development of the underground space hard proterozoic deposits now are used quite often as subsoils of structures in Saint Petersburg. For high-rise buildings embedding pile ends into hard soils often is the only possible option of foundation design, since the depth of rocks in central Saint Petersburg is more than 200 m. One of the main tasks of pile foundation design subjected to big loads is estimation of settlements of such foundation. Meanwhile, deformation properties of hard soils are not studied well yet. Research of these deposits was conducted by the authors on several sites in Saint Petersburg. It consisted of laboratory testing in triaxial cells, and in-situ tests. Results of investigations on one test site in the centre of Saint Petersburg are presented in the paper. Some results of soil-structure interaction modeling of a high-rise building are also presented.