FIELD: the invention refers to the field of creating on the earth surface of the points of supporting boundary net.
SUBSTANCE: the subterranean supporting boundary-mark has a metallic rod mounted into the subterranean opening. The mark is firmly fixed to the upper ending of the metallic rod, an underground anchor is firmly fixed to the lower ending. The underground anchor is placed in solid mass. The metallic rod is mounted right up to the wall of the subterranean opening. The lower ending of the rod is bent upward and fulfills the function of the underground anchor.
EFFECT: simplification of the construction of the subterranean supporting boundary-mark, easing the technology of its manufacturing and installation, using of cheap and accessible materials that reduces the expenditures of means and of time for manufacturing and fastening of the subterranean supporting boundary-mark in the ground and also strengthening of the subterranean supporting boundary-mark.
7 cl, 2 dwg
