FIELD: construction.
SUBSTANCE: tendon comprises additional external reinforcing contour in the form of cylindrical rigid steel or nonmetal cartridge that is installed symmetrically relative to prestressed reinforcement and filled with concrete of at least B 15 grade; with concrete prestressing force in element within the limits from 5 N/sq.mm to 40 N/sq.mm and force of side thrust in cartridge from prestressing within the limits from 0 to 300 N\sq.mm. External cartridge may be arranged with rectangular or square section, and prestressed reinforcement - from coal plastic; at that reinforcement made of steel ropes may be installed in flexible nonmetal tubes with lubricant inside.
EFFECT: increased reliability.
5 cl, 2 dwg, 2 ex
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