| 摘要 |
PURPOSE:To supply a hardening agent slurry having stabilized properties as a ground improving pile is constructed by a method in which mixing water supplied in a fixed amount each time is jetted in a jet mixer and mixed with a hardening agent supplied in a fixed amount. CONSTITUTION:A regulation valve 42 for mixing water is opened to supply mixing water in a mixing water tank 37 to a slurry tank 47, and the mixing water and a hardening agent are instantaneously mixed together by supplying the hardening agent in a fixed amount each from a table feeder 39 to the jet mixer 49 while circulating them in a slurry circulation path consisting of a slurry tank 47, a circulation pump 45, a regulation valve 46 for circulated slurry, and the jet mixer 39. In this way, a hardening agent slurry having a set concentration is continuously manufactured. The hardening agent slurry so obtained is soon supplied to the discharge port of a ground improving treatment machine through a slurry supply line and a discharge pump 36 from the slurry tank 46 in the circulation path. |
