Abstract:

Along with the development of the immersed tunnel technology, more and more underwater tunnels are constructed by immersed tube method in China. The selection between fixed dry dock option and movable dry dock option is closely related to the project cost. Taking ShengwudaoDaxuecheng tunnel as an example, the author makes economic analysis on the fixed drydock option and movable drydock option. Taking the surrounding environment, construction conditions and schedule of the project into consideration, the author finally concludes that fixed dry dock option should be adopted for the prefabrication of the tunnel elements.