Coupled mechanism for seepage,stress,temperature field of permafrost during freezing-thawing process

Coupled mechanism for permafrost is a basis for solving permafrost engineering problems.To understand thoroughly this behavior of coupled seepage,stress and temperature field,from respectively coupled process characteristics and mathematic model building point,coupled mechanism is discussed in the paper. Coupled relationship among three fields and solving method for permafrost engineering problems are determined.This is a new task for evaluating permafrost slope stability and preventing disaster in cold regions.