| 摘要 |
PROBLEM TO BE SOLVED: To provide a desaturation ground improvement method capable of economically performing ground improvement for preventing liquefaction through desaturation by injection of a microbubble liquid or the like, and allowing injection design, injection control, and confirmation of injection effect to be easily performed. ! SOLUTION: A desaturation ground improvement device is used to desaturate a ground by injecting an air-containing fluid such as microbubble into the ground under a groundwater table through an injection pipe 2. The desaturation ground improvement device is equipped with a pressure injection device, a liquid feeding pipe, and the injection pipe for injecting the air-containing fluid, and fine boreholes having a predetermined bore diameter are provided at predetermined positions in the liquid feeding pipe and the injection pipe. An air quantity released into the ground is calculated from an injection speed and an injection rate determined by the injection pressure in the liqu |
