Apparatus for preventing shrinkage of a sheathing over a tendon
View Patent ↗An apparatus for fixing the sheathing of an end of a tendon within an anchor body of a post-tension anchor system has an anchor body with a cavity formed therein, a tendon extending into the cavity, a fixing element engaged with the sheathing of the tendon for fixing a position of the sheathing on the tendon, and a pair of wedges in engagement with the unsheathed portion of tendon within the anchor body. The fixing element is positioned within the cavity. The fixing element can either be a wedge member interposed between the sheathing and the tendon so as to frictionally engage the tendon or a clip member engaged with the sheathing.
1. An apparatus comprising:
an anchor body having a cavity formed in an interior thereof;
a tendon extending into said cavity, said tendon having a sheathing extending at least partially thereover, said tendon having a sheathed portion and an unsheathed portion, said sheathed portion extending into said cavity of said anchor body;
a pair of wedges positioned in frictional engagement with said unsheathed portion of said tendon in said cavity of said anchor body; and
a pair of clip members arranged on diametrically opposite sides of said sheathing, each of said pair of clip members having a generally curved portion with a sharp end, said sharp end biting into said sheathing, said pair of clip members positioned in said cavity of said anchor body.
2. The apparatus of claim 1 , said pair of clip members interposed between a wall of said cavity and said sheathing.
3. The apparatus of claim 2 , said pair of clip members positioned adjacent an end of said pair of wedges within said cavity.
4. The apparatus of claim 1 , said anchor body having a polymeric encapsulation extending thereover, said polymeric encapsulation defining a trumpet extending outwardly of said anchor body in axial alignment with said cavity, said sheathed portion of said tendon extending through said trumpet.
5. The apparatus of claim 1 , said cavity of said anchor body having a tapered portion so as to have wide end opening at one end of said anchor body and a narrow end interior of said anchor body, said anchor body having a passageway extending from said narrow end of said cavity so as to open at an opposite end of said anchor body.
6. The apparatus of claim 5 , said pair of wedges extending along said tapered portion of said cavity.
7. The apparatus of claim 6 , said passageway having a generally constant diameter.
8. The apparatus of claim 4 , said trumpet having a seal extending around an interior thereof so as to be in liquid-tight sealing relation with said sheathed portion of said tendon.