Abstract
In contrast to the mechanical stirring method in which the ground soil and the modifyingmaterial are mixed and stirred by stirring blades and the improved body is formed in the ground, the highpressure injection stirring method is a method in which the improved diameter is changed due to soilcondition and so on. There is a possibility that it can be changed with, and a method for easily confirming theshape, particularly the improved diameter, is highly desired. In this research, the authors propose and proposea method that can make visualization of this improvement situation and confirm the improved diameter inreal time. Confirmation was made by measuring water quality in multiple items. From the results, it wasconfirmed that pH and the values of the other 5 items changed at the same time. And the change was due tothe arrival of the cement slurry. Therefore, it can be said that real-time measurement is possible byvisualization of improved diameter by water quality measurement conducted this time.
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