To provide a soil aggregate which is suitable for improving bottom sediment of various water areas including seaweed bed.
An improver system 3 containing a double-shaft stirring blade 5 is held at the tip of a ladder 2 extending from a workboat 1. The improver system 3 is sunk to water bottom, and an aqueous solution containing an aggregating agent and an adsorption carrier carrying a hydroxy metal ion is supplied to the improver system 3 from a first mixer 11 mounted on the workboat 1 and mixed with bottom mud S of the bottom sediment to promote aggregation of the bottom mud S. After the aggregation has moderately progressed, an aqueous solution containing a solidifier is supplied to the improver system 3 from a second mixer 12 mounted on the workboat 1 to promote further aggregation and solidification and replace the bottom sediment with the water-resistant soil aggregate.
COPYRIGHT: (C)2006,JPO&NCIPI
Yasuhiro Kosai
Akemi Akio
Shigeru Kubo
Nakajima Michio
Toshiaki Wakabayashi
Hironori Shibata
Akemi Akio
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