MEMBER FOR INJECTING IN NATURAL GROUND

PROBLEM TO BE SOLVED: To provide a natural ground filling member generating no unfilled part inside of a multi perforation pipe 1 and unimproved part of natural ground. SOLUTION: This natural ground filling member is composed of the multi perforation pipe 1 inserted into an excavating hole, a long size support 2 inserted into the pipe 1 and a communicating projection arranged on the outer periphery of the support 2. The communication projection is a projection for presenting a state of communicating both side spaces of the communicating projection when inserting the support 2 inside the porous pipe 1. This communicating projection is installed in one or more places of the support 2. An opening part of a filling tube 5 is positioned in both side spaces of the communicating projection.