Of grout penetration grouting, and injection packer of injection material

摘要

PROBLEM TO BE SOLVED: To provide a mixing amount control system for an injection material, an injecting perforated pipe, an injecting packer, and an infiltrating injection method of the injection material using them, enabling optional setting of injection step length and frequency according to the ground condition of the natural ground, enabling continuous work in improving the natural ground and filling into the pipe, and positively improving the natural ground in a short time.;SOLUTION: The infiltrating injection method of the injection material has processes of inserting the injecting perforated pipe 14 into a predetermined depth in an excavated hole 10 formed in the natural ground 12, installing the injecting packer 16 inside the injecting perforated pipe 14, pressing an infiltrating mixed injection material 34 into the injecting perforated pipe 14 on the hole bottom 18 side rather than the injecting packer 16 to inject the injection material into the natural ground 12, filling a quick hardening mixed injection material 66 hardened in a shorter time than the infiltrating mixed injection material 34, into the injecting perforated pipe 14 on the hole bottom 18 side rather than the injecting packer 16, and moving the injecting packer 16 immediately after the quick hardening mixed injection material 66 is hardened.;COPYRIGHT: (C)2006,JPO&NCIPI