METHOD FOR FASTENING UNDERGROUND PIPELINES IN MELTING PERMAFROST GROUNDS Russian patent published in 1995 - IPC

FIELD: civil engineering. SUBSTANCE: pairs of ribbons 2 are winded with design interval onto pipeline 1. Slots 4 are made in walls of trench 3 at predicted level 5 for melting frozen ground 6. Narrow slots 8 to deepen and freeze in those ends of ribbons 2 led up from trench 3 along slots 4 are broken beyond section 7 of predicted melting aureole. Pipeline 1 with negative floatability and sagging is kept at design level with ribbons 2 performing tension as suspensions. Pockets formed with ribbons 2 and filled with ground 9 are operated to increase keeping capacity of backfilling when pipeline 1 has positive floatability and is flooded. EFFECT: decreased man-power. 2 cl, 2 dwg