Case study on application of deep mixing method in Shin-Honmoku area of Yokohama port

In Yokohama Port, the project to reorganize the international container terminal has been conducted with the aim of maintaining and expanding the main route in Japan for container cargo. Among them, the construction of the revetment and the quay with a water depth of -18.0 m with the ground improvement by Cement Deep Mixing Method (CDM Method), has been carried out in Shin-Honmoku Area. In this area, there is a complicated soil profile that the soft clay has been deposited above 10m thickness, the gravel layer (Ag1) and the hard clay layer (Dc1) are intricately interposed. CDM method had been carried out under deep water condition exceeding -20.0 m, the Ag1 layer and Dc1 layer had been set as the bearing layer. Therefore, the effort for determination of bearing layer properly, had been conducted based on the preliminary soil investigation. In addition, the ICT Construction and BIM/CIM which stores the records of design, construction and maintenance with 3D data, have been adopted in this project. This paper describes our efforts have been reported on these issues.