| 摘要 |
FIELD: road and artificial structure building, particularly continuous barriers extending along roads or between traffic lanes. ^ SUBSTANCE: guard barrier comprises vertical posts and longitudinal beams arranged along road and secured to them. The posts are formed of U-type roll-formed shapes or of two U-type roll-formed shapes connected with each other or of C-type shape. Longitudinal beams are formed of C-type shape provided with additional flanges bent into the shape section. Longitudinal beams are directly connected to posts in one or more layers or fastened to posts by means of damping brackets with the use of fastening member made as support clips. The support clips are made as bolts with U-shaped washers welded to bolt heads so that bolt passes into through beam slot and washer encloses above bent flanges to provide vertical post installation on any pitch. Longitudinal beam sections of one layer are butt joined one to another without the use of projecting parts. The sections are butt joined with the use of U-shaped inserts and bolts inserted in spacer bushes. One-sided guard barrier dimension measured from face side of projecting beam to rear post rod wall is equal to 0.25-0.5 m. Double-sided guard barrier dimension measured from face side of projecting beam to face side of another beam is equal to 0.4-0.8 m. Ratio between above dimension and guard height is equal to 0.17-0.63 for one-sided guard barrier and 0.4-1.1 for double-sided barrier. ^ EFFECT: increased car stopping ability and possibility to reduce stopway angle and to compensate structural inaccuracies during barrier assemblage. ^ 9 cl, 14 dwg |
