FIELD: construction of pipeline transportation means, possible use for protecting isolated surface of pipelines during driving in bedrock, permafrost soils, and also in mineral soils with inclusions, which cause damage to isolation of pipeline, such as inclusions of grass, pebbles, individual burs.
SUBSTANCE: bedrock sheet is capable of taking on the form of hollow cylinder encasing the pipeline, and is formed by flexible strip of synthetic material. Flexible strip is made one-layered, two-layered or multi-layered of fibrous bonded sheet material laminated on one or two sides based on fibers of polypropylene or polyether group with saturation of fibrous bonded material with self-hardening composition for whole thickness. Bedrock sheet has required flexibility for enveloping the pipeline and following fastening on it in field conditions, has high impact resistance, resistance to comminution and punching through by sharp soil fractions.
EFFECT: increased reliability of pipeline.
3 cl
