Abstract: The application of underground slurry wall in the deep excavation projects results in a better performance of excavation supporting system, especially, for deep excavations under the complicated subsurface conditions. In the practical applications, the slurry wall construction technique should allow slight modifications in order to fit for the specific subsurface conditions. The key as well as most difficult aspects of the slurry construction methods are introduced in this paper through a case history. The construction monitoring should be performed and the monitoring data should be processed so that the deformation of the slurry wall can be presented. The construction monitored data indicate that the application of slurry wall method in the deep excavation support is a success.

Key words: Complicated Subsurface Conditions, Slurry Walls, Construction Phase； Deformation Monitoring