CN207513020U - A kind of assembly concrete girder construction - Google Patents

Abstract

The utility model discloses a kind of assembly concrete girder constructions, it includes the molding beams of concrete main body of advance one-time-concreting, steel reinforcement cage has been poured in beams of concrete main body, the upper connection reinforcing bar for being connect with ceiling cast in situs is protruded in the upper surface of beams of concrete main body, the main connection reinforcing bar for being connect with major structure of construction cast in situs is protruded at the both ends of beams of concrete main body, the preformed hole formed in beams of concrete main body pouring molding is equipped in the two sides of beams of concrete main body and bottom surface, preformed hole laterally vertical regular arrangement, preformed hole is blind hole.The utility model is built suitable for assembly concrete, and is connect reliably with building body, and preformed hole avoids destruction of the later stage work to beams of concrete.

Description

A prefabricated concrete beam structure

technical field

The utility model relates to the field of assembled construction engineering, in particular to an assembled concrete beam structure.

Background technique

Prefabricated reinforced concrete structures are more and more widely favored by the engineering community because of their advantages such as fast construction speed, material saving, and less environmental pollution. However, the poor integrity of prefabricated reinforced concrete structures has become the main factor hindering its development.

At present, there are many foreign studies on the form of beam-column joints in reinforced concrete prefabricated structures, but domestic research on this aspect is relatively small. Ordinary prefabricated concrete buildings are limited to exterior wall panels, interior wall panels, stairs, floors, Prefabrication of balcony panels, air-conditioning panels, etc., while beams, columns, and even shear walls still need to be cast-in-place, which reduces construction efficiency and increases construction costs on the one hand, and often affects construction quality, especially in the later stages of hydropower. The installation of pipelines often requires work such as slotting and anchoring, which will damage the integrity and aesthetics of the beam structure, and a little careless construction will cause serious safety hazards.

Utility model content

The technical problem to be solved by the utility model is to provide a prefabricated concrete beam structure, which is poured and formed in the factory in advance. The construction cost is improved, and the construction efficiency is improved, and the reserved holes avoid the damage to the concrete beams in the later work.

To solve the problems of the technologies described above, the technical scheme adopted by the utility model is as follows:

A prefabricated concrete beam structure, including a pre-cast concrete beam main body, a steel cage is poured inside the concrete beam main body, and upper connecting steel bars protruding from the upper end surface of the concrete beam main body for connection with the ceiling. The two ends of the beam body protrude from the main connecting steel bars used to connect with the main structure of the building on site. On both sides and bottom of the concrete beam body, there are reserved holes formed during the pouring of the concrete beam body. The reserved holes are horizontal and vertical. Arranged in a regular manner, the reserved holes are blind holes.

Further, the length of the upper connecting steel bar protruding from the upper end face of the main body of the concrete beam is not less than 25 times its diameter.

Further, the diameter of the reserved holes is 10-30 mm, the depth is 30-150 mm, and the distance between the two reserved holes is a multiple of 100 mm, 150 mm, 200 mm or 300 mm.

Further, the minimum width of the main body of the concrete beam is 200 mm, or a multiple of 50 mm is added to the minimum width.

Compared with the prior art, the utility model has the following beneficial effects:

1. The main body of the prefabricated concrete beam structure of the utility model is pre-formed by one-time pouring in the factory, which is suitable for prefabricated concrete buildings, and the beams poured and formed in the factory can better ensure the quality. On the upper end surface and both ends of the main body of the concrete beam, there are protruding connecting steel bars connected with the main structure of the building by on-site pouring. The formwork can be poured at the connection, the connection is more reliable, the integrity of the building is guaranteed, the construction cost is reduced, and the construction efficiency is improved.

2. On both sides and bottom of the main body of the concrete beam, there are reserved holes formed during pouring. The reserved holes can be directly used for fixed-point installation of water and electricity pipelines and various decorative parts during interior decoration of the building. It makes it unnecessary to set up steel keel, drilling, slotting and pre-embedded fixings and other processes during decoration, and also avoids slotting and anchoring on the beam that will damage the integrity and strength of the beam, ensuring the construction of the building quality.

Description of drawings

Fig. 1 is a schematic sectional view of the utility model.

Detailed ways

A prefabricated concrete beam structure as shown in Figure 1 includes a pre-cast concrete beam body 2, that is, the concrete beam body is completed in the factory before building construction, and can be used directly at the construction site. During production, it is formed by pouring concrete in the mold at one time, and it goes through pouring, vibrating, scraping, numbering, curing, and demoulding, and then it is placed in the yard for curing until 28 days before leaving the factory. The concrete beam body that is uniformly produced and maintained in the factory can ensure better quality than the beam structure cast on site, and the beam structure formed at the factory at one time is also stronger than the beam structure cast by on-site workers. Of course, in the concrete beam main body, reinforcement cage 4 must be poured, and reinforcement cage 4 is necessary for the beam structure. In the illustration, reinforcement cage 4 includes main reinforcement 6 and square side reinforcement 5. The minimum width of the concrete beam main body 2 is 200mm. According to actual engineering needs, the width of the concrete beam main body 2 can be adjusted during production.

The upper end surface of the concrete beam main body 2 is protruded with the upper connecting steel bar 1 used for the ceiling cast-in-place connection, and the length of the upper connecting steel bar 1 protruding from the upper end surface of the concrete beam main body is not less than 25 times its diameter. The end protrudes with the main connecting reinforcement used to connect with the main structure of the building on site, and the main connecting reinforcement is not shown in the figure. Both the connecting steel bar and the steel cage 4 are poured and fixed in it when the main body of the concrete beam is poured and formed. When in use, the main connecting steel bar is connected to the steel bar of the main structure of the building through grouting sleeve connection technology, grout anchor lap joint and other technologies, and then connected The connection with the main structure of the building can be completed by pouring the formwork at the place.

Both sides and the bottom of the concrete beam main body are provided with reserved holes 3 formed when the concrete beam main body is poured and formed. The reserved holes 3 are regularly arranged horizontally and vertically, and the reserved holes 3 are blind holes. The diameter of the reserved holes 3 is 10-30 mm, the depth is 30-150 mm, and the distance between the two reserved holes 3 is a multiple of 100 mm, 150 mm, 200 mm or 300 mm.

The utility model can be applied to industrial or civil prefabricated buildings, and the reserved holes 3 can be used for installation of electromechanical pipelines, and can be used for fixed connection and installation of various decorative parts required for the integrated decoration of prefabricated buildings. The utility model has a wide range of applications for the assembled concrete beam structure, is easy to standardize, is economical and environmentally friendly, and has high cost performance, and it only needs to fill the unused reserved holes at the end of the decoration.

The above-mentioned embodiments of the utility model are not limiting the protection scope of the utility model, and the implementation manner of the utility model is not limited thereto. On the premise of not departing from the above-mentioned basic technical idea of the present utility model, other modifications, replacements or changes made to the above-mentioned structure of the present utility model in various forms shall fall within the protection scope of the present utility model.

Claims (4)

1. a kind of assembly concrete girder construction, it is characterised in that：Including the molding beams of concrete main body of advance one-time-concreting, Steel reinforcement cage has been poured in the beams of concrete main body, has protruded to show with ceiling in the upper surface of the beams of concrete main body Field pours the upper connection reinforcing bar of connection, protrudes to pour with major structure of construction scene at the both ends of the beams of concrete main body The main connection reinforcing bar of connection is built, is equipped in the two sides of the beams of concrete main body and bottom surface and is poured in the beams of concrete main body The preformed hole formed during type is built up, the preformed hole laterally vertical regular arrangement, the preformed hole is blind hole.

2. assembly concrete girder construction according to claim 1, it is characterised in that：Described in the upper connection reinforcing bar protrudes The length of the upper surface of beams of concrete main body is not less than 25 times of its diameter.

3. assembly concrete girder construction according to claim 2, it is characterised in that：A diameter of the 10 of the preformed hole~ 30mm, depth are 30~150mm, and the spacing between two preformed holes is the multiple of 100mm, 150mm, 200mm or 300mm.

4. the assembly concrete girder construction according to claims 1 to 3 any one, it is characterised in that：The concrete The minimum widith of beam main body adds the multiple of 50mm for 200mm or on the basis of the minimum widith.