Inside and outside combined type system and method for reinforcing hollow plate through prestressed steel wire ropes

Abstract

The invention discloses an inside and outside combined type system for reinforcing a hollow plate through prestressed steel wire ropes. The system comprises the hollow plate and a reinforcing structure. The reinforcing structure comprises a set of embedded steel bars anchored in the hollow plate. The main steel wire ropes are distributed in a hole of the hollow plate and on the plate bottom of the hollow plate correspondingly, one end of each main steel wire rope winds around one embedded steel bar and then is anchored with an extrusion anchor head, and the other end of each main steel wire rope is connected with a main threaded sleeve. The system further comprises connecting sleeves, each connecting sleeve is connected with a main threaded rod and an auxiliary threaded rod, each main threaded rod is connected with the corresponding main threaded sleeve, and each auxiliary threaded rod is connected with an auxiliary threaded sleeve. The auxiliary steel wire ropes are arranged between the auxiliary threaded sleeves and the other embedded steel bar. Grouting materials are arranged in the hole of the hollow plate and on the plate bottom of the hollow plate and wrap the reinforcing structure. After prestressing force is applied to the steel wire ropes, the hollow plate can be reinforced efficiently, and the bearing capacity and rigidity of the hollow plate can be remarkably improved; the surface and decoration of the hollow plate need not be destroyed; and construction is convenient and fast, large equipment is not needed, and tension control precision is high.

Description

technical field [0001] The invention relates to the technical field of civil engineering and transportation, in particular to a system and method for reinforcing hollow slabs with internal and external combined prestressed steel wire ropes. Background technique [0002] Due to the influence of material aging, construction quality, natural or man-made factors, many existing hollow slab structures of bridges and houses are in urgent need of repair and reinforcement, and countries all over the world spend huge sums of money on this every year. The existing hollow slab reinforcement technologies mainly include enlarging section method, bonding steel reinforcement method, pasting fiber composite material reinforcement method, adding fulcrum reinforcement method, steel strand mesh-polymer mortar reinforcement method, etc. The existing reinforcement methods mainly have the following problems: (1) There is a stress hysteresis effect between the reinforcement material and the origina...

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Problems solved by technology

The existing reinforcement methods mainly have the following problems: (1) There is a stress hysteresis effect between the reinforcement material and the original component, and the ability to work together is poor, which greatly affects the reinforcement effect; (2) The anchorage length at the end of the reinforcement material is not enough, and it is easy to find Peeling damage, can not give full play to the strength of the material; (3) increase the cross-sectional size of the original component, increase the self-weight, affect the view and use

Moreover, the current reinforcement method is to reinforce the panels and walls separately, which cannot effectively enhance the integrity of the structure

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