An automatic tensioning system and method for prestressed fiberboard reinforced beams and slabs

Abstract

The invention discloses an automatic tensioning system for prestressed fiberboard reinforced beams and slabs, which comprises a tensioning end anchor, a fixed end anchor, and a tensioning bracket connected with the tensioning end anchor; Jack, the threaded rod passes through the tensioning bracket and is connected with the through-type jack. The upper toothed nut and the lower toothed nut are respectively arranged on both sides of the tensioning bracket on the threaded rod, and the upper toothed nut and the lower toothed nut are respectively driven by Mechanism drive; it also includes a two-part clip-type fixture, the upper surface of the clip-type fixture is provided with a cylinder, and the sleeve nested outside the cylinder is connected to the threaded rod; one end of the fiberboard is clamped in the clip-type fixture, and the other end of the fiberboard is anchored to the Fixed end anchorage. Through the control of the motor, the maintenance and continuous tension of the fiberboard prestress are realized during the jacking and unloading process. During the construction process, there is no need for a large number of nut tightening processes, which saves a lot of labor costs, and can speed up the entire construction process and shorten the construction period.

Description

technical field [0001] The invention relates to the technical field of civil engineering and transportation, in particular to an automatic tensioning system and method for prestressed fiberboards to strengthen beams and slabs. Background technique [0002] Due to the influence of material aging, construction quality, natural or man-made factors, many existing bridge projects and houses urgently need to be repaired and reinforced, and countries all over the world spend huge sums of money on this every year. Fiberboard is lightweight, high-strength, and corrosion-resistant. Sticking the fiberboard on the surface of the component and pulling it can enhance and improve the mechanical performance of the component. Using fiberboard with high rigidity and applying prestress to it is an effective way to solve the above engineering problems. By applying prestress to the fiberboard and anchoring it at both ends of the concrete member through a special anchorage, the strength utilizat...

AI Technical Summary

Problems solved by technology

However, the existing automatic tensioning system for prestressed fiberboard reinforced beams and slabs is too bulky and the force transmission is not direct because the anchorage is separated from the fixing device, which makes the construction inconvenient and wastes materials; and in the existing prestressed fiberboard The automatic tensioning system for strengthening beams and slabs is used for the reinforcement of long-span bridge structures. Due to the limited stroke of the hydraulic jack, it cannot meet the requirements of the larger tensile elongation of the fiberboard. Therefore, it is necessary to repeatedly press and unload the jack. It is a large amount of manual operation, time-consuming and labor-intensive

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