Abstract
Jet grouting method is known as a measure against liquefaction on the foundation where the fine-grain fraction content in a harbor structure etc. Its problems include high treatment costs and adverse environmental effects of the sludge, which is produced during the cutting of soil. The present study proposes a method for reducing the amount of sludge through its efficient utilization.This method is characterized by recycling of sludge soil. At first, the sludge soil produced by water-jet cutting is collected on the ground. Then, in the recycling process, this sludge soil is mixed with cement and this mixture is filled though the tip of a rod.
In order to check such a feature, a laboratory experiment and test construction were carried out. The following are the results of the laboratory experiment and the test construction: 1) high-quality soil improved material is produced with a distance of 1 m between nozzle of a high-pressure water jet and the filling outlet without contamination of filling materials, 2) from the viewpoint of non-miscibility with the sludge and repletion of the drilled areas, the desirable flow value is 190±20mm.
