ABSTRACT
The disaster rehabilitation work for the Nakanoshima district damaged by the 2011 off the Pacific coast of Tohoku Earthquake was a project carried out for the purpose of constructing the breast wall, quay and related facilities. The most challenging task was the reconstruction of the 542.2m breast wall. Key requirements were [1] build the breast wall in a narrow space, and [2] minimize noise and vibrations during construction not to impact the adjacent buildings and existing piers. To meet these requirements, about 80% of the target length was a structure based on the foundation using a combined wall composed of steel tubular piles and sheet piles, while about 20% of the length formed a structure of cantilever-type steel tubular pile retaining wall. The construction used the rotary press-in piling, Combi-Gyro Method, and Non-staging System. By sharing the project experience, this paper illustrates the advantages of the press-in piling method.
