Automatic tensioning system and method of prestress fiber plate reinforcing beam plate

Abstract

The invention discloses an automatic tensioning system of a prestress fiber plate reinforcing beam plate. The system comprises a tensioning end anchoring tool, a fixed end anchoring tool and a tensioning support frame, wherein the tensioning support frame is connected with the tensioning end anchoring tool; a core penetrating type jack is arranged in the middle part of the tensioning support frame; a threaded rod passes through the tensioning support frame and is then connected with the core penetrating type jack; an upper toothed screw nut and a lower toothed screw nut are respectively arranged at the two sides of the tensioning support frame arranged on the threaded rod; the upper belt gear screw nut and the lower belt gear screw nut are respectively driven by a driving mechanism; the automatic tensioning system also comprises a two-sub-clamp-piece type clamp; columns are arranged on the upper surface of the clamp piece type clamp; a sleeve nested outside the cylinder is connected with the threaded rod; one end of a fiber plate is clamped in the clamp piece type clamp; the other end of the fiber plate is anchored at the fixed end anchoring tool. Through the control of a motor, the maintaining of the prestress of the fiber plate and the continuous tensioning in the jack jacking and unloading process can be realized. In the construction process, the process of screwing a great number of screw nuts is not needed; great labor cost is reduced; in addition, the whole construction process can be accelerated; the construction period is shortened.

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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