混凝土既是建筑结构的主要材料又能达到一定的防水目的,在经济技术上比较合理,所以在防水建筑物中应用广泛。但在已建的隧道、地下道、地下室等工程中有的还有漏水现象,有的还相当严重,虽经补救也难以达到防水要求,不得不常年内部抽水使用,既增加了费用又促使结构的腐蚀损坏,造成浪费。 Concrete is not only the main material of the building structure but also to achieve a certain degree of waterproofing purposes, economically and technically more reasonable, it is widely used in waterproofing structures. However, some leaks occurred in the existing tunnels, underpasses and basements. Some of them are still quite serious. Although it is difficult to meet the water-proof requirements after remedial work, they have to be internally pumped into water for perennial use. This increases both the cost and the structural Corrosion damage, resulting in waste.