北方农村房屋,经常因冻害而遭到破坏.冻害成因有两种:一是土壤冻胀引起的,其表现是,住房、库房、井房等墙体开裂、门槛上抬和门窗开关困难.二是融化土层的不均匀性引起的,其表现是,房屋和围墙的向阳面倾斜、倒坍.如果在房屋设计、施工和使用等方面采取适当措施,则冻害可以避免. Rural houses in the north are often destroyed due to frost damage. There are two causes of frost damage: First, due to soil frost heaving, its performance is that housing, warehouses, wells and other walls are cracked, doors are lifted, and doors and windows are difficult to open and close. It is caused by the inhomogeneity of the melting soil layer, and its performance is that the sunny side of the house and the wall are inclined and fallen. If appropriate measures are taken in the design, construction, and use of the house, freezing damage can be avoided.