ABSTRACT
The article summarizes the results of the operation of the roadbed for more than fifty years of operating experience on degraded permafrost soils. The modern technique of numerical modeling of the forecast of the process of degradation of frozen soils is considered, which allows the development of modern structures that reduce or exclude deformations of structures. The construction and operation of structures in permafrost conditions is associated with the degradation of the temperature state of the soil of structures due to the effects of solar radiation. Global climate change plays a crucial role in ensuring the reliability of railway infrastructure facilities. To prevent thawing of permafrost soils of the base, thermostabilizers are used - seasonal cooling devices and stone cooling sketches. The article considers predictive thermal engineering studies of permafrost foundations of railway bridges and pipes in order to substantiate regulatory design solutions. Numerical studies were carried out by the finite element method using a non-stationary and physically nonlinear thermophysical model of soils
