Thermal stabilization of the foundation made of thawed permafrost viscoelastic soils

Under the influence of climatic conditions, highly compressible thawed soil layers appear in the foundation of a construction object. Therefore, the study of the deformed state of such a foundation is relevant, since the creep properties of thawed soil can lead to additional foundation settlements. To prevent the process of soil creep, thermal stabilization of the foundation is considered. The object of the study is heaving freezing dispersed soils. The purpose of the work is to analyze the nature of freezing of the soil base when using thermal stabilization systems and to study soil deformations under gradual loading of foundations. The article presents studies of the freezing soil massif, its temperature regime and settlement of pile foundations during thermal stabilization of the soil base. Based on the results of experimental data, the dependences of soil deformation in the process of ice-soil mass formation are established. A gradual decrease in building settlement with an increase in the frozen soil massif is revealed. Based on the results of field observations and numerical modeling of the soil temperature regime, the nature of soil base freezing was revealed in the form of the formation of individual ice-soil massifs with the presence of thawed soil between them in the first and second years of thermal stabilization and the gradual freezing of thawed zones until the formation of a solid frozen massif.

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