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Moriki A.,Kyushu Regional Construction Bureau | Terashi M.,NIKKEN SEKKEI
14th Asian Regional Conference on Soil Mechanics and Geotechnical Engineering | Year: 2011

The mechanical dewatering technique has been developed to decrease the volume of clay slurry. In the case where it is possible to utilize dewatered clay lumps as geomaterials for embankment, two effects on extension of the life of disposal pond can be achieved simultaneously. In this paper, the mechanical properties of individual dewatered clay lump and aggregates are described based on the results of laboratory tests and a large scale trial construction. The dewatered clay lumps are confirmed to be a good geomaterial.

Ikeda H.,Kyushu Regional Construction Bureau | Kawano M.,Kyushu Regional Construction Bureau | Kiyoyama T.,Kyushu Regional Construction Bureau | Yamamoto S.,Coastal Development Institute of Technology | And 3 more authors.
International Journal of GEOMATE | Year: 2015

One of the methods for increasing the capacity of disposal pond for dredged marine clay is the volume reduction in already reclaimed dredged clay ground. In the vacuum consolidation method, the pore water in the reclaimed clay ground is squeezed by vacuum pumps, and ground surface settles. In this paper, the performance of reclaimed land with dredged clay by the vacuum consolidation method is introduced, and is compared with the prediction of consolidation behavior at the design. In addition, the back analysis of settlement behavior of such reclaimed ground is performed, and the design procedure of vacuum consolidation for reclaimed ground with dredged clays is proposed. © 2015, International Journal of GEOMATE.

Yoshida H.,Kyushu Regional Construction Bureau | Kume H.,Kyushu Regional Construction Bureau | Yamamoto S.,Coastal Development Institute of Technology | Terashi M.,Formerly
Advances in Transportation Geotechnics II - Proceedings of the 2nd International Conference on Transportation Geotechnics, ICTG 2012 | Year: 2012

In a rapid construction for a reclaimed land with dredged clay, it is necessary to apply a ground improvement to accelerate the consolidation of clay ground. In this case, the ground condition and consolidation parameters of reclaimed land are needed for the design of ground improvement. In this paper, the design method of vertical drain for reclaimed land with dredged clay was explained, and the settlement behaviors of reclaimed land during construction and after opening of airport were summarized. From the residual settlements predicted using the log-t method, the effectiveness of design method was confirmed. © 2012 Taylor & Francis Group.

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