FOUNDATION IMPROVING STIRRER AND FOUNDATION IMPROVING ENGINEERING METHOD USING THE SAME

摘要

PURPOSE:To finish the execution of excavating a hole with a samll number of times of reciprocation by mixing efficiently a solidifying material discharged from an excavating rod with excavated soil. CONSTITUTION:A stirrer is formed of a rod body 1 connected to the tip side and provided in the upper and lower ends with upper and lower ejection holes 1a, 1b respectively and upper and lower stirring blades 2, 3 respectively provided in positions of the upper and lower ejection holes 1a, 1b on the peripheral surface of the rod body 1. A solidifying material in excavation is ejected mainly from the lower ejection port 1b and stirred by the upper stirring blade 2. The solidifying material in extraction of the stirrer is ejected mainly from the upper ejection port 1a to be stirred by the lower stirring blade 3. In either case, since the solidifying material is stirred by the stirring blade receding from the ejection port in the progress direction of the excavating rod, the solidifying material is efficiently mixed with the excavated soil with small number of times of reciprocation.