Application of partial top-down construction of excavations under complex environment

The top-down construction as an effective method, is rarely used in deep excavation owing to its complexity. The partial top-down construction as an example is introduced. The successful application of this method needs to work together in the design, construction and monitoring. In a word, information alization construction is very important, and it can optimize the design and construction. This study may to provide important and valuable reference for the similar projects.