Based on several examples in construction of Fuxingmen-Bawangfen Double Line of Beijing Subway, this paper describes the degree of waterproof and control principle of water in subway design and construction, analyzes the causes of structural percolating water and its treatment, which can provide good expericence to subway design and construction in future.

This paper analyzes the causes and provides the relative counter-measures of structural leakage.

There would be some defects in construction and operation with the concrete structures, such as crack, structural joint leakage.

The causes which lead to leakage and condensation phenomenon of the basement are specifically analyzed in the paper,which is closely combined with the practical villa project at Nanjing Cuiping hill.