FIELD: machine building.
SUBSTANCE: ground repair complex is arranged on surface. Soil above pipeline is excavated. Underground repair complex is mounted on pipeline. Narrow slit is cut in soil above pipeline ahead of downed repair complex. Underground repair complex is moved over pipeline surface to grind soil and remove faulty coating. Ground soil and removed coating are moved from repair complex front section to its rear section. Removed soil and faulty coating are compacted and pipe compound is deposited on pipeline surface. Space above new coating is covered by removed compacted soil.
EFFECT: repair without withdrawing pipeline from trench.
2 dwg
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