Automatic control method for prestressed intelligent tensioning

Abstract

The invention discloses an automatic control method for prestressed intelligent tensioning. The automatic control method comprises the steps of installing a tensioning device; construction of tensioning prestressed tendons by the tensioning device; construction of locking the prestressed tendons by the tensioning device and intelligent controlling over tensioning construction by a controller. Theautomatic control method has the beneficial effects that a tensioning telescopic part of a bidirectional jack works first, the prestressed tendons are tensioned to a predetermined stress value, and then a jacking telescopic part works to push a reverse pressing plate to push and press a working jacket, so that a working anchor clamps the prestressed tendons, sliding of the prestressed tendons canbe reduced; compared with a traditional tensioning system, the automatic control method can reduce stress loss, avoid excessive tensioning, better control the tensioning process and improve the tensioning effect, and realize intelligent tensioning monitoring and control by combining with the controller; and intelligence and convenience are achieved, and control accuracy is high.

Description

technical field [0001] The invention relates to the technical field of building and bridge construction, in particular to an automatic control method for prestressed intelligent tensioning. Background technique [0002] Prestressed tensioning technology is widely used in building and bridge construction. The use of prestressed construction can slow down the occurrence and expansion of concrete matrix cracks and prolong the service life. However, the prestressed tensioning construction process has high requirements on materials and construction techniques, and the problem of prestress loss is more likely to occur. At the end of the prestress loading, the clamp and the anchor ring can only be tightened due to the rebound of the prestress tendons, resulting in the loss of the loaded prestress. In order to solve the problem of prestress loss in the current construction process, it is often necessary to use the method of super tension, that is, the maximum stress of tension load...

AI Technical Summary

Problems solved by technology

However, the hypertension method often does not determine the amount of stress loss, cannot guarantee that the final stress meets the design requirements, and is prone to prestressed tendon breakage or damage to the anchorage. The hypertension method cannot perfectly solve the problem

On the other hand, in engineering, a prestressed concrete beam often needs to stretch multiple prestressed tendons at the same time, and the assembly of prestressed tendons and anchor rings is very inconvenient

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