Review article

This paper presents the results of field observations of the mass installation of jacked piles in water-saturated clayey soil. The purpose of the work was to assess the changes in the stress-strain state of the soil massif which determine its deformations. To achieve this, comprehensive monitoring of various parameters was carried out at the test site.There has been found that the heave of the soil and the foundations of the existing building is accompanied by changes in excess pore pressure: its values increase with depth and decrease with distance from the work area.The maximum deformations of the structure are comparable to the displacement of the nearest surface soil markers. At the same time, the presence of excavation enclosure structures did not prevent soil heave and changes in pore pressure. It has been established that, contrary to the common belief regarding the gentle nature of driving prefabricated piles by static jacking, the application of this technology requires prior geotechnical substantiation.