FIELD: anchoring in ground. SUBSTANCE: technique for anchoring in ground is implemented with the aid of underground anchor coming in the form of tube with two axial grooves as minimum arranged along at least one region of wall of tube in its part driven into ground. In this case poker located in tube is used. Lower sharpened end of poker protrudes beyond lower end of tube and its upper end interacts with upper end of tube for their simultaneous driving into ground. Region with axial grooves is deformed outwards in radial direction. Salient feature of invention is deformation in radial direction with the use of tool sunk flush into tube and forming controllable radial load on internal surfaces of walls of tube. Data related to expansion in process of anchoring are measured and tool is removed after preset degree of expansion is achieved. Novelty in design of anchor consists in such arrangement of tube that it takes radial load created by tool and applied in direction of tube to form controlled expansion in this region at least in two opposite points in middle between grooves on each side of internal surface. EFFECT: possibility of fabrication of deep anchors of large diameters with aggregate of expanded regions in each anchor attachment. 4 cl, 5 dwg
