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我国江南在春夏之交是霉雨季节,阴雨连绵,地下水位上升,如果建筑物的地面没有防潮或防潮处理不好,就会给人带来极大的灾害。 室内潮湿的原因是多方面的,如空气潮湿、室外排水不畅、房间通风不好等,而地下水毛细作用反潮到地面是重要原因。我省大部分地区地表层多属粘土和亚粘土。根据有关资料记载:通常粗砂和大块碎石类土毛细作用水位上升高度不过几厘米,而粘土可以超过2～3m,亚粘土也可以超过1～2m。
Jiangnan is a mild rainy season at the turn of the spring and summer, with continuous rain and rain. The groundwater level rises. If the building’s ground is not protected from moisture or moisture, it will cause great disasters. The reasons for indoor humidity are various, such as humid air, poor outdoor drainage, poor ventilation of the room, etc., and groundwater capillary action is an important reason for the anti-tide to the ground. The surface layer in most parts of our province is mostly clay and sub-clay. According to the relevant data, it is generally stated that the level of capillarity of coarse sand and large pieces of crushed stone rises by only a few centimeters, while that of clay can exceed 2 to 3 m, and that of sub-clay can also exceed 1 to 2 m.