Support assembly used for prestressed floorslab post-pouring belt stretching end

Abstract

The invention discloses a support assembly used for the prestressed floorslab post-pouring belt stretching end. The support assembly comprises a bottom plate, a steel wire mesh and two upper plates; the bottom of each upper plate is provided with a protruding segment, the upper end face of the bottom plate is provided with a clamp groove, the lower end faces of the upper plates and the upper end face of the bottom plate are provided with several grooves respectively, two sides of each groove are provided with semicircular openings respectively, the semicircular openings in the upper plates and the semicircular opening in the bottom plate correspond to each other and form a circular clamp region, clamp blocks are arranged in grooves in a sliding mode, and the bottoms of the grooves are provided with springs connected with the clamp blocks. The support assembly is arranged at the post-pouring belt stretching end and can play a role in fixing and supporting prestressed ribs and block concrete at the post-pouring belt stretching end so as to reduce the overflow amount of the concrete, the compactness of the concrete of a region is thus ensured, at the same time, the concrete part of the region is prevented from cracking when the prestressed ribs are tensioned, and the anti-crack performance of a whole floorslab is ensured.

Description

technical field [0001] The invention relates to the field of building construction, in particular to a support assembly used for the tension end of a post-cast belt of a prestressed floor slab. Background technique [0002] Ordinary beam-slab structures are prone to cracking, especially for structures with a length of more than 100 meters, and concrete cracks are almost inevitable. After the prestressed structure is prestressed, it will produce an axial compressive stress on the structure, and its value is about 10-18kg / cm2. If the prestressed plate is to crack, the prestress must be overcome first. After overcoming the prestress , It is necessary to overcome the tensile strength of concrete to crack, so the prestressed structure has excellent crack resistance, especially suitable for solving the problem of crack resistance of super-long structures. The prestressed structure has quite superior elastic recovery performance. If the ordinary reinforced concrete beam slab crack...

AI Technical Summary

Problems solved by technology

However, when pouring, such as Figure 4 As shown, at the tension end of the post-cast belt, after the concrete is poured on the steel frame of the floor slab, part of the concrete will overflow along the part where the prestressed tendon and the post-cast belt connect, that is, many irregular spurs are formed in the post-cast belt. It not only affects the concrete compactness at the tension end of the post-cast belt, but also reduces the tensile effect of the prestressed tendon when the prestressed tendon is stretched

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