The construction of urban rail transit requires large-area deep foundation pit excavation. Due to the limitation of construction site, the construction working surface of underground space is narrow, and the environme...The construction of urban rail transit requires large-area deep foundation pit excavation. Due to the limitation of construction site, the construction working surface of underground space is narrow, and the environmental conditions of underground structure wall are poor, and the construction working surface is wet and there is local leakage. Such construction conditions are also a great challenge for waterproof engineering. In recent years, the construction technology in the waterproof field of domestic underground engineering has been continuously improved, especially the engineering leakage problem of underground tunnel of rail transit has been improved, but the situation is still not optimistic. The long-term groundwater leakage not only affects the normal operation of rail transit, but also the long-term immersion of groundwater in concrete structure will seriously affect the strength of reinforcement in the structure. As urban underground infrastructure, the importance of structural safety of rail transit is self-evident. How to prevent groundwater leakage and prolong the service life of the main works is an important mission for waterproof practitioners of underground works.展开更多
文摘The construction of urban rail transit requires large-area deep foundation pit excavation. Due to the limitation of construction site, the construction working surface of underground space is narrow, and the environmental conditions of underground structure wall are poor, and the construction working surface is wet and there is local leakage. Such construction conditions are also a great challenge for waterproof engineering. In recent years, the construction technology in the waterproof field of domestic underground engineering has been continuously improved, especially the engineering leakage problem of underground tunnel of rail transit has been improved, but the situation is still not optimistic. The long-term groundwater leakage not only affects the normal operation of rail transit, but also the long-term immersion of groundwater in concrete structure will seriously affect the strength of reinforcement in the structure. As urban underground infrastructure, the importance of structural safety of rail transit is self-evident. How to prevent groundwater leakage and prolong the service life of the main works is an important mission for waterproof practitioners of underground works.
