GEOTECHNICAL MONITORING OF ARRANGEMENT OF THE EXCAVATION OF NEW BUILDING NEAR EXISTING BUILDINGS

Object. To improve and test the complex geotechnical monitoring system for the arrangement of the excavation of the newly constructed pit, which is deeper than the level of the sole of the foundations of the existing surrounding buildings. Method. Normative methods of inspection of a technical condition of bearing building designs, their bases and the bases; modeling of the stress-strain state of the system «soil massive – existing foundations with superstructure and engineering networks – excavation at different stages of its construction»; long-term geodetic observations of the deformations of residential brick buildings with foundations on a natural basis, which are in the zone of influence of the excavation of the new building; methods of mathematical statistics for processing the results of experiments. Results. A geotechnical monitoring system was developed and tested on a typical natural object for the arrangement of the enclosure of the newly constructed excavation, which is deeper than the level of the sole of the foundations of the existing surrounding buildings; geodetic observations were made of the deformations of buildings with strip foundations on a soaked loess base, which are in the zone of influence of the excavation of the new building, at various stages of the construction of its enclosure. Scientific novelty. New research data were obtained on the deformations of buildings with strip foundations on a soaked loess base, which are in the zone of influence of the excavation of the new building, at various stages of the installation of its enclosure; analysis of the stress-strain state of the system «soil massive – existing foundations with superstructure and engineering networks – excavation at different stages of its construction»; the complex system of geotechnical monitoring has been improved for the arrangement of the excavation of the newly constructed pit, which is deeper than the level of the sole of the foundations of the existing surrounding buildings. The practical significance. An effective structural-technological solution for the arrangement of the enclosure of the built-up pit, deeper than the level of the sole of the foundations of the existing surrounding buildings, has been improved and implemented into geotechnical practice for the conditions of dense buildings, with minimal costs and a negative impact on the surrounding buildings due to the staged excavation, and the corresponding methodology geotechnical monitoring.