Russian Federation
Russian Federation
The results of numerous surveys conducted for buildings and structures with large underground floors indicate the possibility of an ascent effect. It is not uncommon for the assessment of the surfacing of underground structures to be neglected or to approach this issue formally. Objective: analysis and implementation of engineering solutions aimed at preventing the surfacing of underground parking lots in conditions of elevated groundwater levels. The study was carried out for one of the facilities erected in the southern part of the city of St. Petersburg, which required the implementation of measures during operation. The paper provides a brief description of the engineering and geological conditions of the construction site, identifies the main problems of the structure under consideration (defects, damages, deformations) that arose during operation. Methods: the basic hypothesis of the most probable causes of defects, damages and deformations of the object is formed, modeling is performed, and it includes an analysis of hydrostatic pressure, as well as methods for stabilizing such structures. Results: the reliability of existing engineering solutions was assessed and the main errors made during construction were identified. The results of geotechnical modeling and tests performed using the PLAXIS 3D complex and static pile tests are analyzed, which allows us to draw conclusions about the causes and ways to prevent parking from surfacing. Reinforcement solutions using anchor (multi-screw) piles have been implemented. Practical significance: an approach to eliminating accidents during parking surfacing has been developed and implemented, consisting in stabilization through the use of anchor (multi-screw) piles, which can be implemented at other construction sites.
anchor pile, testing, soil bearing capacity, anchor structure design, bearing capacity calculation, screw pile
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