Hollow composite floor slab and construction method thereof

A technology of superimposing floor slabs and hollow cores, applied in the direction of slabs, building components, buildings, etc., can solve the problems of large amount of formwork, low construction efficiency, poor integrity, etc., to improve crack resistance, construction efficiency, and integrity. Effect

Inactive Publication Date: 2015-05-13
JINAN RAILWAY TRANSPORT GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the cast-in-place concrete floor slab has defects such as large amount of formwork, low construction efficiency, and easy cracking. The prefabricated floor slab has defects such as structural integrity and poor seismic performance. The assembled integral floor slab has troublesome construction, poor integrity, and difficult reliability. and other defects
At the same time, b

Method used

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  • Hollow composite floor slab and construction method thereof
  • Hollow composite floor slab and construction method thereof
  • Hollow composite floor slab and construction method thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0045] Example 1

[0046] Such as figure 1 , figure 2 As shown, a hollow laminated floor slab includes a prefabricated hollow bottom plate 1 and an upper cast-in-place slab 2. The hollow bottom plate 1 is provided with full-length fully enclosed reserved holes 4 and semi-closed reserved holes 3 at intervals. The prefabricated hollow floor 1 The bottom plate steel bars 5 are arranged at intervals along the vertical and horizontal directions. The semi-closed reserved holes 3 are provided with steel bars 6 in the holes. The hollow bottom plate 1 is filled with reinforced concrete to form an upper cast-in-place slab 2. Multiple sets of top steel bars 7 are arranged at intervals in the horizontal direction, and concrete is poured on the hollow bottom plate 1 as a whole to form a hollow laminated floor.

[0047] The floor reinforcement 5 adopts prestressed reinforcement or is arranged at intervals between prestressed reinforcement and non-prestressed reinforcement. The fully enclosed r...

Example Embodiment

[0055] Example 2

[0056] Such as Figure 4 , Figure 5 As shown, the opening end of the semi-closed reserved hole 3 in this embodiment is flush with the upper surface of the hollow bottom plate 1, and the diameter of the fully closed reserved hole 4 is smaller than the diameter of the semi-closed reserved hole 3. The other structure is the same as the first embodiment.

[0057] Such as Image 6 As shown, the thickness of the laminated board in this embodiment is 120mm, the thickness of the prefabricated hollow bottom plate 1 is 80mm, the radius of the fully enclosed reserved hole 4 is 25mm, the radius of the semi-closed reserved hole 3 is 35mm, and the hole spacing is 300mm , The distance between the bottom of the reserved hole and the bottom plate is 20mm. The construction method and steps are the same as in Example 1.

Example Embodiment

[0058] Example 3

[0059] Such as Figure 7-11 As shown, a hollow laminated floor slab includes a prefabricated hollow slab 1. The hollow slab 1 is provided with full-length fully enclosed reserved holes at intervals. The prefabricated hollow slab 1 is provided with floor reinforcements 5 longitudinally and transversely. 1 includes multiple groups of plate ribs 9, each group of plate ribs 9 is divided by the cavity of the bottom plate, the bottom of the plate rib 9 is provided with a plate rib reserved hole 10, and the plate rib reserved hole 10 is penetrated with a steel bar 6 in the hole. Concrete is poured on the hollow bottom plate 1 to form the upper cast-in-place slab 2. The upper cast-in-situ slab 2 is provided with multiple sets of top steel bars 7 spaced longitudinally and laterally. The hollow bottom plate 1 is integrally poured with concrete to form a hollow laminated floor.

[0060] The bottom plate reinforcement 5 adopts prestressed steel reinforcement or adopts a spa...

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PUM

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Abstract

The invention discloses a hollow composite floor slab and a construction method of the hollow composite floor slab. The hollow composite floor slab comprises a prefabricated hollow bottom plate and an upper cast-in-place slab, continuous fully-closed preformed holes and semi-closed preformed holes are distributed in the prefabricated hollow bottom plate at intervals, or the continuous fully-closed preformed holes and plate ribs are distributed on the prefabricated hollow bottom plate at intervals, bottom plate rebars are distributed on the prefabricated hollow bottom plate at intervals in the longitudinal direction and the transverse direction, prestress rebars or prestress rebars and non-prestress rebars distributed at intervals are adopted as the bottom plate rebars, and the rebars penetrate through the semi-closed preformed holes or plate rib preformed holes. Concrete is poured on the prefabricated hollow bottom plate to form the upper cast-in-place slab, multiple sets of top rebars are distributed on the cast-in-place slab in the longitudinal and the transverse directions parallel to the bottom plate at intervals, and reinforced concrete is integrally poured on the bottom plate to form the hollow composite floor slab. Only the prefabricated bottom plate needs to be produced and transported, transportation and installation are convenient and fast, formworks are not needed, the crack resistance and the integrity are good, and the construction efficiency is high.

Description

technical field [0001] The invention relates to the field of building construction, in particular to a hollow laminated floor slab and a construction method thereof. Background technique [0002] At present, the floor slab mainly adopts several forms of cast-in-place concrete floor slab, prefabricated floor slab, and assembled integral floor slab. Among them, the cast-in-place concrete floor slab has defects such as large amount of formwork, low construction efficiency, and easy cracking. The prefabricated floor slab has defects such as structural integrity and poor seismic performance. The assembled integral floor slab has troublesome construction, poor integrity, and difficult reliability. and other defects. At the same time, because the composite slab has less or no reinforcement in the post-cast concrete, the integrity between the prefabricated slab and the cast-in-place slab is poor, so the composite slab in the prior art cannot be widely used, so the research and deve...

Claims

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Application Information

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IPC IPC(8): E04B5/17
Inventor 王国富
Owner JINAN RAILWAY TRANSPORT GRP CO LTD
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