FORMING METHOD FOR CAST-IN-PLACE PILE BY MIXING AND STIRRING

摘要

PROBLEM TO BE SOLVED: To improve the strength of a pile body section. SOLUTION: A ground improving device 32 provided with a stirring shaft 30 having a stirring/mixing vane 28 on the tip side is used in generating the pile body section of a cast-in-place pile 10. When the stirring shaft 30 is intruded into the ground, the slurry including cement is injected into the ground while the stirring/mixing vane 28 is rotated, and ground soil and a solidifying agent are mixed and stirred. The slurry has the water cement ratio below 60%, and it is added with a viscosity reducing agent, reinforcing fibers, and the solidifying agent of 4 KN or above per unit volume of the slurry.