Lightweight material combination unit filled prestressed concrete cast-in-situ hollow slab

Abstract

Disclosed is a prestressed concrete on-site pouring hollow slab filled with light material combined unit, which comprises light material combined unit, upper layer reinforcing steel bar, lower layer reinforcing steel bar, tendon, blind beam reinforcing steel bar and concrete. The light material combined unit consists of light tubes and connection bar, which is arranged between the upper layer reinforcing steel bar and the lower layer reinforcing steel bar, the combined unit tubes is in the same direction with the bigger bending moment within the slab, The blind beam is arranged at intervals of a certain distances, in which the tendon is centralized laid. Said on-site pouring slab has the advantages of both the prestressed structure and the hollow slab structure, has high hollow percentage, implements one time concrete pouring moulding, is suitable not only for one-way slab, but also for two-way slab. The slab has big span, light weight, good heat and sound insulation effects, good reliability, shock resistance and crack resistance.

Description

Technical field [0001] The invention relates to a prestressed concrete cast-in-place hollow slab, which belongs to the field of general building construction. Background technique [0002] In the field of construction, with the increasing number of long-span concrete structures, more and more floor slabs adopt the technology of combining prestressing and lightweight material filling. The prestressed concrete structure can increase the span-to-height ratio of horizontal components, and at the same time improve the deformation, crack resistance and deformation resistance of components. Lightweight material infill panels reduce the weight of the structure compared to solid panel structures. The existing forms of prestressed concrete cast-in-place hollow slabs are: (1) "a large-span unbonded prestressed cast-in-place hollow slab" filled with circular hollow tubes and "cast-in-place prestressed reinforced concrete hollow floor (2) "Composite prestressed concrete frame inverted ...

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problems that the hollow slabs filled with circular tubes have a low hollow ratio, the time spent on laying pipes on site is long, and it is difficult to handle when two-way force is applied, the concrete of the hollow slabs filled with flakes or flat blocks needs to be poured twice defects; the prestressed hollow slab provided by the present invention has a relatively high hollow ratio and can meet the requirements of two-way stress, and at the same time, the concrete can be poured into shape at one time, and the construction efficiency is very high

Filling with lightweight materials solves the problem of reducing the weight of components. Lightweight materials must have a small unit volume weight and no pollution, and can be solid or hollow pipes

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