Abstract
We have devised the on-site reforming method to improve the seabed ground at the original position by the bucket attached to the ground improvement ship. In this method, it is possible to perform the process of excavating the seabed clay, mixing with the reforming material, and inputting the improved soil in situ, greatly simplifying the construction. In addition, since the inside of the bucket can be kept in a dry condition, it is possible to improve the strength quality of the improved soil and to suppress turbidity during construction. In order to clarify the feasibility of this method, we conducted laboratory experiments on 1/20 model.
As a result, excavation of clay ground, mixing with reforming materials, and inputting the improved soil can be carried out, and feasibility of this method is considered to be high. On the other hand, in this experiment, the reforming material particle diameter of 1.18 mm or less was used, but in practical construction, the maximum particle diameter is about 40 mm. For this reason, evaluation of mixability in scale-up experiments using reformers of actual particle size is considered as a future task.
