Davlatov Daler Nazulloevich, Rahmatzoda Komron Rahmat,  Yakubov Alijon Oyhamadovich, Marzbonshohi Saidahmad

Annotation:

The article is devoted to the conversion of strip-pile foundations into more reliable combined structures. Key aspects are explored, from the rationale for such reinforcement to a detailed description of the stages of work involving pressure testing and grouting. Particular attention is paid to how the reinforced elements interact with the subgrade. Preliminary pressure testing acts as a method of actively compacting the adjacent and underlying soil, creating a "preloaded cushion" under the strip foundation and increasing friction forces along the lateral surfaces of the piles. The additional use of grouting is aimed at stabilizing and increasing the strength of critical zones or weak interlayers. The study describes in detail how controlled pressure testing, often combined with injection methods (cementation) to stabilize weak interlayers, leads to stress redistribution and an increase in deformation moduli in the critical zone.

Keywords: foundation reinforcement, combined foundations, pressure testing, soil grouting, reconstruction, bearing capacity.