Super-long prestressed steel bar traction locking device

A technology of prestressed steel bars and traction locks, applied in the directions of columns, piers, pillars, etc., can solve the problems that the welded joints are easily stuck inside the corrugated pipe and the local structure of the main body is damaged, and achieves the effect of facilitating traction and reducing resistance.

CN105178351BInactive Publication Date: 2017-03-08TIANJIN CHENGJIAN UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2017-03-08
Estimated Expiration
Not applicable · inactive patent

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Abstract

A super-long prestressed reinforcement traction locker comprises a restraint device and a nut. The restraint device is composed of a conical part and a tail part integrally. The conical part is of a truncated cone structure, a reinforcement penetrating hole is formed in the axial center of a conical tip of the front portion of the conical part, a tendon arrangement hole is formed in the axial center of the rear portion of the conical part and communicated with the reinforcement penetrating hole, and the diameter of the tendon arrangement hole is larger than that of the reinforcement penetrating hole. The tail part is composed of a plurality of arc pieces, one end of each arc piece is connected to the edge of the tendon arrangement hole formed in the rear end face of the conical part, and the arc pieces define a plurality of rounds with gaps. Moreover, threads are formed on the peripheral surface of each arc piece. The nut is in threaded connection with the peripheral surface of the tail part. The super-long prestressed reinforcement traction locker has the beneficial effects that the inner diameter of the outer end of the tail part can be decreased through rotation of the nut, so that great restraint force is exerted on embedded reinforcements and prestressed tendons, and a connection effect is achieved; the conical part is of the truncated cone structure, resistance between the super-long prestressed reinforcement traction locker and a corrugated pipe can be reduced, and the prestressed tendons can be pulled conveniently; after traction is completed, cutting is not needed, and only the nut needs to be unfastened.
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Description

technical field

[0001] The invention belongs to the technical field of prestressed steel bar traction in bridge construction engineering, in particular to an ultra-long prestressed steel bar traction locking device. Background technique

[0002] Bridges are usually located at the throat of the urban traffic network, holding the lifeblood of urban traffic. Long-span bridges are bridges with relatively large spans in bridge construction, featuring large spans and long construction periods. With the maturity of bridge construction technology, the proportion of long-span bridges is increasing. In the construction of long-span bridges, during the construction of the bridge deck, it is necessary to apply prestress to the tendons penetrating into the main structure of the bridge, then fix the tendons and perform grouting, and relax the prestressed tendons after the concrete solidifies to make the main structure of the bridge Obtain a prestress value after construction is complete...

Examples

Embodiment Construction

[0014] The ultra-long prestressed steel bar traction locking device provided by the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0015] Such as figure 1 — Figure 5 As shown, the ultra-long prestressed steel bar traction locking device provided by the present invention includes a restraint device 1 and a nut 2; wherein the restraint device 1 is integrally formed by a cone part 3 and a tail part 4, the cone part 3 is a frustum-shaped structure, and the front part A steel bar through hole 5 is formed at the axial center of the cone tip, and a steel bar setting hole 6 that communicates with the above steel bar through hole 5 and has a diameter greater than the steel bar through hole 5 is formed at the rear axial center; One end is connected to the edge of the tendon setting hole 6 on the rear end surface of the cone part 3 and is formed by a circular arc-shaped piece 7 with multiple gaps, and thread...