Influence of temperature variation on Seismic subsidence properties of frozen soil

摘要

To reduce the engineering geological disasters in permafrost regions and improve the durability of highways and railways. The dynamic load test of a certainly frozen soil roadbed in the G214 highway is carried out by taking the initial environment negative temperature gradient as the control variable for study the vibration and subsidence characteristics of frozen soil under temperature variation. Results show that the frozen soil is more prone to collapse at the same temperature than the rising frozen soil. The lower the negative temperature of the initial environment is, the more easily the frozen soil will become; As the temperature gradient increases, the temperature rise of frozen soil is greater than that at the same temperature, and the difference increases first and then decreases gradually to 0. When the frozen soil temperature rises from the initial environment temperature to above 0, the vibration settlement is nearly the same. In the design of roadbed in permafrost region, a comprehensive analysis and design should be taken considering the negative temperature gradient of the initial environment.