Study On The Leakage Causes And Treatment Methods For The Old Operation Tunnel

With the current social and economic development, in order to further improve the national highway and railway network, a large number of highway and railway tunnels have been constructed. Because of the design, construction, material and geological factors, whether domestic or foreign, most of the existing tunnels are suffering from defects to some degree. Defects of existing tunnels mainly consist of water damage, freezing damage, lining split and lining erosion, among which water damage is the most common. So-called "9 of 10 tunnels leak" is a reflection of frequent water hazards. Tunnel water damage not only increases the humidity inside the tunnel, causes short circuit accidents and endangers transport safety, but also leads to other defects. currently domestic design of waterproof and drainage is at the developing stage. It mainly refers to the foriegn mature technologies and experiences. So it needs further systematic and comprehensive study.Through an extensive literature and on the basis of previous research results, relying on the water leakage causes and treatment project of Watershed Tunnel of Shen Dan Line, combined with the investigation of water leakage causes and treatment of Watershed Tunnel, features of water leakage in Watershed Tunnel are summed up and the causes of water leakage in the tunnel are analyzed. Whole life cycle concept of maintenance management in existing tunnels is introduced. It is used to explore appropriate and effective maintenance management program. This not only ensures the normal operation of the facility system but also extends the service life of the facility system. The goal of sustainable development and energy saving is achieved. According to the trends of drainage technologies in tunnels domestic and abroad, waterproofing and drainage design and construction technology of the operation tunnels have been discussed; some advice about treatment of water leakage has been proposed and some useful conclusions have been summarized, according to the actual construction conditions of the treatment project.