Significant climatic warming is in progress and causes degradation of permafrost and stability of superstructures. Especially under the more complex climate

frequently ultra weather and climate

the progress of bearing capacity in frozen ground is becoming more complex. taking a single pile in representative humid permafrost in Qinghai-Tibet plateau for example

considering the pile exposed in the air absorbs solar radiation

permafrost phase-change

natural air convection and global warming

the sensitivity of pile vertical bearing capacity to short-term climatic anomaly in permafrost regions is analyzed using finite element method. The numerical results show that the pile bearing capacity become lower under the short-term warmer climate because the decrease of adfreeze strength between pile and frozen ground

and no change of adfreeze area. The decrease influence is not fade away in the next years. The warmer climatic make the more decrease of bearing capacity. Under the colder climatic alternates with warmer climate

the pile bearing capacity is changed with outer air temperature

and regain normal after the climaticanomaly.