ANCHOR DEVICE (ALTERNATIVES) Russian patent published in 2002 - IPC

FIELD: construction engineering; highway engineering; manufacturing reinforced concrete structures used in bridge engineering. SUBSTANCE: according to first alternative device for cable bundled bar passed through duct-former has steel supporting member made in the form of perforated plate bent over broken or bow-shaped line; cables with enclosing cylinders on ends are passed through member holes at angle of 20 deg. to bundled bar axes; ends of cables contact pressure members installed equidistantly at above mentioned angles; each of pressure member is made in the form of plate; coupling bolts whose axes are in plane or in parallel with plane of location of enclosing cylinder axes are passed through holes of plane and those of supporting member; force ring is formed on end of duct-former in area enclosed by at least two turns of reinforced spiral installed on both sides of ring; spiral is installed concentrically and in a spaced relation to force ring, this space exceeding at least half of its radius; L-shaped exhaust pipe is introduced in duct-former hole between turns of reinforced spiral, mainly along axis or with displacement towards top part through ring hole; pipe end inserted in duct-former interior is parallel to cable axis of bundled bar. According to second alternative mechanical design of anchor device is essentially simplified without impairing its operating characteristics. EFFECT: enhanced efficiency of using anchor devices; simplified design; reduced material consumption. 3 cl, 4 dwg