INVESTIGATION OF THE DYNAMICS OF GAS EMISSION FROM FROZEN SOILS WITH CHANGE IN TEMPERATURE AND PRESSURE

摘要

The presence of a gas component is an important feature of the frozen soils structure, which is currently practically not studied by laboratory methods during engineering surveys. To assess the gas content and dynamics of gas emission from frozen soils, the authors have developed equipment and a technique for triaxial and shear testing of samples at different temperatures and stress states. As a result of the research, it was revealed that the gas emission begins even with insignificant changes in the frozen soils temperature. The impact of external loads reduces the temperature at which gas emission begins and affects its dynamics when the temperature changes. The strength characteristics of frozen soils after gas emission change depending on the negative temperature and the value of volumetric compression pressure.