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Large span prefabricated monolithic casting structure and construction method

A construction method and large-span technology, which are applied in building construction, construction, and building materials processing, etc., can solve the problems of high prefabricated beam height, high movable platform height, large bending moment during construction, etc., and achieve a small floor span. , The effect of fast hoisting speed and shortened construction period

Active Publication Date: 2013-04-17
宁波优造建筑科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The traditional large-span multi-storey reinforced concrete structure with high storey height generally adopts the cast-in-place post-tensioned prestressed structure. This kind of structure has a large amount of work to support the formwork during construction, and is prone to safety accidents such as the collapse of the high-support formwork. There are many construction procedures and the construction speed is slow. However, the prefabricated monolithic structure disclosed in the ZL201020553611. Prefabricated beams are heavy, and it is very difficult to transport and hoist the beams on the floor. Moreover, the current beams are all rectangular beams, which are heavy and have small lateral stiffness. The beams are easy to crack during transportation and hoisting. The large bending moment in the stage often causes the problem that the height of the prefabricated girder is large, and the amount of reinforcement is controlled by the construction stage, resulting in waste of steel reinforcement and slow construction progress. One kind of inverted T-shaped long-span prefabricated beam is used to construct the frame first and then construct the building. There is no report on the long-span structure and construction method of the surface

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Embodiment Construction

[0068] see Figure 1 to Figure 16, in the embodiment of a long-span prefabricated monolithic structure provided by the present invention, it includes a floor 1, a composite beam 2 supporting the floor 1 and a column 5, and the composite beam 2 is divided into a short frame girder 21 , the longitudinal frame beam 22 and the secondary beam 23, the secondary beam 23 is connected to the main beam 21, the composite beam 2 includes a prestressed prefabricated beam and a cast-in-place part, wherein the prestressed prefabricated beam includes a beam body 3 and the prestressed steel strand 32 embedded in the beam body 3 as the main reinforcement; the two ends of the short frame main beam 21 and the long frame beam 22 are connected with the column 5; the long frame beam 22 and the secondary beam The cross-sectional shape of the prefabricated beam part of 23 is an inverted T shape, and the composite beam after pouring is an I-shaped beam connected to the floor 1. The I-shaped beam forme...

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Abstract

Disclosed is a large span prefabricated monolithic casting structure. The large span prefabricated monolithic casting structure comprises a floorslab, a superposed beam and a column, the superposed beam and the column are used for supporting the floorslab, the superposed beam is divided into a short frame main beam, a long frame beam and an auxiliary beam, the auxiliary beam is connected with the main beam, the superposed beam comprises a prestress prefabricated beam and a cast-in-situ portion, the prestress prefabricated beam comprises a beam body and a pre-stressed steel strand which is buried in the beam body and serves as a main rib, two ends of the short frame main beam and the long frame beam are connected with the column, cross sections of prefabricated beam portions of the long frame beam and the auxiliary beam are invertedly T-shaped, the superposed beam after monolithic casting is an I-shaped beam connected with the floorslab, and the auxiliary beam and the long frame beam utilize the inverted T-shaped prestress prefabricated beams with small intervals. The large span prefabricated monolithic casting structure has the advantages that the span, the thickness and the self weight of the floorslab are small, heights of the beams are reduced, reinforcing bars are reduced, and the short main beam which uses a superposed rectangular beam is good in shear resistance and convenient to connect with the auxiliary beam.

Description

technical field [0001] The invention relates to a structural system and a construction method of a building, in particular to a construction method of a large-span prefabricated monolithic structure. Background technique [0002] The traditional large-span multi-storey reinforced concrete structure with high storey height generally adopts the cast-in-place post-tensioned prestressed structure. This kind of structure has a large amount of work to support the formwork during construction, and is prone to safety accidents such as the collapse of the high-support formwork. There are many construction procedures and the construction speed is slow. However, the prefabricated monolithic structure disclosed in the ZL201020553611. Prefabricated beams are heavy, and it is very difficult to transport and hoist the beams on the floor. Moreover, the current beams are all rectangular beams, which are heavy and have small lateral stiffness. The beams are easy to crack during transportation...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E04B1/342E04G21/02
Inventor 杨峰
Owner 宁波优造建筑科技有限公司
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