The Temperature Control Technology of Bridge Foundation in Permafrost Regions

The stability of engineering structure are threatened in the permafrost regions by the global warming. Therefore, it is necessary to further the study on the temperature field of the pile foundation in the frozen soil area. In the paper, six different forms (pile arrangement within two, three, four; pile arrangement outside two, three, four) were studied for temperature effect in the next 50 years. Date from these numerical simulation indicates that the thermal pile has a active cooling effect in the bridge and the stability of bridge pile foundation were promoted. The same number arrangement of the the thermal pile is better outside the pile foundation than that inside the pile foundation.