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Pre-tensioning quick construction device and method for large-span floor slab

The technology of a construction device and construction method, which is applied in the field of pretensioning rapid construction devices for large-span slabs, can solve the problems of inability to realize prefabricated slab cast-in-place construction, joints prone to water leakage, and no technical reports, etc., so as to save the amount of steel bars, Effects of improving construction safety and simplifying construction operations

Active Publication Date: 2018-01-26
上海珮钧科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the limited hoisting weight of the crane, the current construction method is to splice multiple prefabricated floor slabs, so that the joints between the prefabricated slabs are prone to water leakage, especially in earthquakes, which are easy to fall, and the safety is poor
In addition, the preparation of prefabricated slabs currently requires specific pre-tensioned fixing piles, so that it is impossible to carry out cast-in-place construction of prefabricated slabs on site
If the overall cast-in-place construction of the prefabricated floor slab can be carried out on site, it can not only solve the problems of water leakage and safety of the prefabricated floor slab, but also save steel bars, and has the advantages of good flatness and large span, but there is no relevant technical report so far.

Method used

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  • Pre-tensioning quick construction device and method for large-span floor slab
  • Pre-tensioning quick construction device and method for large-span floor slab
  • Pre-tensioning quick construction device and method for large-span floor slab

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Experimental program
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Effect test

Embodiment 1

[0030] refer to figure 1 As shown, the upper pretension frame 1 provided by this embodiment includes an upper support beam 2, and lower steel bar hanging teeth 3 and 4 are arranged under the two ends of the upper supporting beam 2, and the prestressed steel bar 5 is installed and fixed on the lower steel bar hanging teeth 3 and 4 to get the upper prestressing frame 1; fix the prestressed steel bar 5 in the concrete, and after the concrete solidifies, remove the lower steel bar hanging teeth 3 and 4 at both ends, because the prestressed steel bar 5 itself has tensile force and is fixed by the concrete at the same time Therefore, it will generate a pull back force on the concrete to achieve the prestressing effect, thereby improving the span and flatness of the floor slab and saving steel bars.

Embodiment 2

[0032] refer to figure 2 As shown, the upper pretension frame 1 provided in this embodiment includes an upper support beam 2, and brackets 6 / 7 are arranged at both ends of the upper support beam 2, and the lower steel bar hanging teeth 3 / 4 are respectively arranged at the lower ends of the corresponding brackets 6 / 7 . Install and fix the prestressed steel bar 5 on the lower steel bar hanging teeth 3 and 4 to obtain the upper prestressing frame 1; fix the prestressed steel bar 5 in the concrete, and after the concrete solidifies, remove the lower steel bar hanging teeth 3 and 4 at both ends, and then Pullback forces are created in the concrete. This structure is convenient for installation and disassembly.

Embodiment 3

[0034] refer to image 3 As shown, the lower pretension frame 8 provided by the present embodiment includes a lower support beam 9, and upper steel bar hanging teeth 10 / 11 and fixed hooks 13 / 14 are respectively provided at both ends of the lower support beam 9; the fixed hooks 13 and 14 are connected with the lower support Beams 9 are all connected by detachable fixed connections. Install and fix the two ends of the prestressed reinforcing bar 12 on the hanging teeth 10 and 11 of the upper reinforcing bar to obtain the lower prestressing frame 8 . The prestressed reinforcement 12 is fixed in the concrete, and after the concrete is solidified, the upper reinforcement hangers 10 and 11 at both ends are removed, and a pullback force will be generated in the concrete.

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Abstract

The invention discloses a pre-tensioning quick construction device and method for a large-span floor slab. The pre-tensioning quick construction device comprises a floor slab formwork and a cross beamfor supporting the floor slab formwork, and the two ends of the cross beam are connected with load-bearing walls or / and load-bearing beams. The quick construction device is applied to the quick construction method, and the quick construction method comprises the following operation steps that 1, the floor slab formwork is laid on the cross beam of the quick construction device; 2, fixing pieces are mounted at the two ends of the cross beam; and 3, assemblies formed in the step 2 are lifted onto the corresponding load-bearing walls or / and the load-bearing beams, and then steel bar laying and concrete pouring are conducted on the load-bearing walls or / and the load-bearing beams. An existing mode that the floor slab formwork is erected in air can be transformed to the mode that the floor slab formwork is mounted on the ground and then directly lifted to a construction site, thus the safety and efficiency of construction can be improved, the risk of construction is reduced, and practicability is quite high.

Description

technical field [0001] The invention relates to the construction technology of buildings, in particular to a pretensioning rapid construction device and method for large-span floor slabs. technical background [0002] Now with the continuous improvement of people's living standards, the quantity and quality of buildings have been greatly improved. Therefore, the saving of building materials and the improvement of construction speed are becoming more and more important. Now there are many inventions trying to save building materials, such as the patent application No. 200910076895.6 published by the Chinese Patent Office on July 22, 2009, and the title of the invention is "a kind of anti-floating construction method for thin-walled hollow tubes of cast-in-place concrete hollow floors". A method is disclosed in the invention, which uses thin steel plates to weld the anti-floating frame of the thin-walled hollow pipe to solve the anti-floating and anti-movement of the thin-wal...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E04G11/50
Inventor 王武生
Owner 上海珮钧科技有限公司