Super-long prestressed steel bar traction locking device

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.

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...

AI Technical Summary

Problems solved by technology

Moreover, during the traction process, the welded joint is easily stuck inside the bellows. At this time, it is necessary to cut off the part of the main structure where the welded joint is stuck, which will cause damage to the local structure of the main body.

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