Abstract
In recent years, China's underground rail transit has developed rapidly, especially with the construction of urban subway tunnels, submarine traffic lanes, water conservancy and hydropower, and municipal public tunnels. The construction of underground tunnels by shield method has been widely used. However, in some complex geology, the construction of the shield method still encounters many problems, including ultra-shallow covering and connecting through the group houses. How to solve these practical engineering problems is a topic that people are very concerned about. Based on this, this paper has carried out related research work on three common problems, including the ultra-shallow soil-pressure-balanced shield lake bottom tunnelling technology, the shield tunnelling control technology for the close-crossing group buildings, and the construction technology of complex geological and extra-large subway stations. Through the review of existing cases and theoretical research, it provides references for similar construction problems in the future.
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