FIELD: machine building.
SUBSTANCE: according to procedure of laying underground pipeline in zones of higher seismicity pipe line is enveloped with flexible element of round cross section at constant pitch of coil. A steel wire cable or cable out of synthetic fibres is used as the flexible element.
EFFECT: increased reliability of pipeline operation in zones of higher seismicity due to reduced value of lengthwise forces applied to pipeline at seismic effect on ground in zone of pipeline laying.
3 cl, 2 dwg
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