Abstract：Based on fracture mechanics theory，a general failure criterion is set up and a fully new analysis method is given for plate foundation and ground widely used in cold regions. Frost heaving force and flaws of frozen soil are considered in the criterion，and the criterion would be more reasonable and more practical than conventional one. The stability of frost heaving for plate foundations embedded deeper and shallower than freezing-depth are analyzed，and the strength analysis method for failure of bottom plate of water pool is proposed as well. After that，practical samples are analyzed by different methods，from which the validity of the new method is gotten.
