CN2203324Y

CN2203324Y - Clamp type anchoring device for fix end of prestressed reinforcement

Info

Publication number: CN2203324Y
Application number: CN 94223823
Authority: CN
Inventors: 周正; 韩宗喜; 宋慧杰; 张琍
Original assignee: BEIJING RESEARCH INST OF BUILDING ENGINEERING
Current assignee: BEIJING RESEARCH INST OF BUILDING ENGINEERING
Priority date: 1994-10-21
Filing date: 1994-10-21
Publication date: 1995-07-12
Anticipated expiration: 2004-10-21

Abstract

The utility model relates to a novel clamp sheet type anchoring device for fixed ends of prestressed reinforcement, comprising an anchoring ring, a cone-shaped clamp sheet, and the inner surface and the conic surface of the cone-shaped clamp sheet are provided with screw threads. Because the conic surface of the cone-shaped clamp sheet of the anchoring device is provided with the screw thread, that the anchoring device is used with a wedge-tightened machine can solve the problems that tool anchor dog marks appear on the exterior surface of the reinforcement of the stress end when the anchoring device of a fixed end is assembled with a double-cylinder jack, self-lock of the anchoring ring is unreliable, etc.

Description

Clamp type anchoring device for fix end of prestressed reinforcement

The utility model relates to a kind of civil works prestressing force, the strand tapered anchorage of reinforcing bar anchored end when the anchorage of reinforcement during construction, particularly prestressed reinforcement are constructed.

Existing strand tapered anchorage generally adopts taper or claims the wedge type ground tackle, it is mainly as prestressed reinforcement stretch-draw end ground tackle, puts after stretch-draw that intermediate plate will have good follow-up in the process, could clamp reinforcing bar effectively, therefore, the fitting face of intermediate plate and anchor ring processing fineness is higher.When this strand tapered anchorage uses as fixed end, adopt twin-tub jack pair ground tackle to apply pretightning force, also need the follow-up of anchor clipper functional, but when the cone-shaped clip of ground tackle and anchor ring fitting face processing fineness are higher, though the follow-up performance of intermediate plate is good, but after the release of twin-tub jack, the reinforcing bar external surface is by twin-tub jack instrument grip teething trace, thereby reduced the intensity of reinforcing bar, in addition, owing to be wedge-like engagement between intermediate plate and the anchor ring, after shedding pretightning force, the anchoring failure often appears in the self-locking property instability, causes the loss that can not save.

The utility model purpose provides a kind of novel anchorage, utilizes this ground tackle can guarantee the reliability of intermediate plate and anchor ring self-locking in the ground tackle.

For achieving the above object the utility model by the following technical solutions: it comprises anchor ring and cone-shaped clip, and the inner surface belt screw thread of described cone-shaped clip is characterized in that the conical surface of described cone-shaped clip is threaded.

The utility model is described in further detail below in conjunction with accompanying drawing:

Fig. 1: the utility model structural representation

The left view of Fig. 2: Fig. 1

Fig. 3: cone-shaped clip partial enlarged drawing

Among Fig. 1,1 is anchor ring, its inside is bellmouth, taper angle (α) is 7 degree, 2 is cone-shaped clip, insert the anchor ring endoporus, the quantity of cone-shaped clip can be 2,3,4, form endoporus in the middle of it behind several cone-shaped clips insertion anchor ring endoporus, use for inserting reinforcing bar, the inner surface belt screw thread of each cone-shaped clip, the conical surface of cone-shaped clip is threaded, and the anchor ring material is soft than intermediate plate, its objective is ground tackle and tension wedge machine are used after, cone-shaped inner hole surface at anchor ring forms rough plane, to increase frictional force, avoids intermediate plate and anchor ring slip phenomenon to occur, improve the reliability of self-locking, the spiral shell square t of screw thread is controlled between the 0.4-0.6mm on the conical surface, and thread depth h is that 0.15--0.3mm(sees Fig. 3), its effect is better.

The utility model advantage: adopt the utility model and tension wedge machine to be used, the moveable anchor dental impression appears in the reinforcing bar outer surface in the time of can solving Double-cylinder jack and assemble the stiff end ground tackle, and the problem such as the anchor ring self-locking is unreliable.

Claims

1, a kind of novel prestressed reinforcement fixed end strand tapered anchorage, it comprises anchor ring and cone-shaped clip, the inner surface belt screw thread of described cone-shaped clip is characterized in that the conical surface of described cone-shaped clip is threaded.

2, by the described prestressed reinforcement fixed end of claim 1 strand tapered anchorage, it is characterized in that the screw thread spiral shell square on the described cone-shaped clip conical surface is 0.4-0.6mm, thread depth is 0.15-0.3mm.