| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a method and device for constructing a hydraulic solidification material liquid-substituted column, which can constructing a substituted column free from inclusion of soil mass, the substituted column having a stable quality and improved in extraction yield strength regardless of the properties of a target ground, and having a uniform diameter from the leading end to the terminal end of the column.SOLUTION: An excavating auger having a supply passage for hydraulic solidification material liquid includes at least an excavating claw and a discharge port for the hydraulic solidification material liquid at the leading end thereof. The excavating auger is propelled to a predetermined depth with rotation by a construction device provided with an auger motor. Thereafter, the excavating auger is pulled up with or without rotation while discharging the hydraulic solidification material liquid mixed with magnesium carbonate from the discharge port to fill a predetermined section of an excavation part with the hydraulic solidification material liquid, and then a core material is inserted into the liquid while the hydraulic solidification material liquid is unhardened.</p> |
