Journal of Japan Society of Civil Engineers, Ser. B3 (Ocean Engineering)
Online ISSN : 2185-4688
ISSN-L : 2185-4688
Annual Journal of Civil Engineering in the Ocean Vol.34
DEVELOPMENT OF ON-SITE REFORMING METHOD USING IMPROVED DREDGED SOIL BY STEELMAKING SLAG
Hideki HONDAYoshitomo YAMAMOTOHiroaki YAMAGUCHIKazuho TANISHIKIKazuyuki MIYAMOTOEijiro MIZOKUCHI
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2018 Volume 74 Issue 2 Pages I_904-I_909

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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.
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© 2018 Japan Society of Civil Engineers
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