Connection nodes between precast beams and cast-in-place structures

Abstract

The present invention relates to a connection node between a prefabricated beam and a cast-in-place structure. The connection node between the prefabricated beam and the cast-in-place structure includes two cast-in-place structures and a prefabricated beam; a steel cage is pre-embedded in the cast-in-place structure; the prefabricated beam includes a prefabricated layer, a face bar and a plurality of first stirrups, each first stirrup is fixedly connected to the upper side of the prefabricated layer, and the plurality of first stirrups are spaced apart along the longitudinal direction of the prefabricated layer to form an interlaced channel; the face bar includes two sub-face bars, each sub-face bar includes a relative anchoring end and an interlaced end, the interlaced ends of the two sub-face bars respectively penetrate into the interlaced channel from the relative ends of the prefabricated layer and are fixedly connected to each other, and the anchoring ends of the two sub-face bars are respectively fixedly connected to the steel cage in the corresponding cast-in-place structure. In the present invention, the interlaced ends of the two sub-face bars are used to interlace the first stirrups, thereby avoiding the need for the anchoring ends to interlace the first stirrups, making the interlacing more convenient, and not requiring the use of tools such as crowbars, thereby reducing the work intensity and shortening the construction time.

Description

Technical Field

[0001] The present invention relates to the field of prefabricated buildings, and in particular to a connection node between a prefabricated beam and a cast-in-place structure. Background Art

[0002] Currently, prefabricated buildings have become a trend in the modernization of my country's construction industry. Prefabricated buildings are buildings made from prefabricated components in a factory and then transported to the construction site for assembly. Prefabricated buildings not only improve the quality of construction projects but also significantly reduce energy consumption.

[0003] However, in the prior art, when assembling precast beams, it is necessary to lay out reinforcement bars with bent anchors at both ends, and these bent anchors need to be anchored into the cast-in-place beams. Since the reinforcement bars have bent anchors at both ends, insertion is difficult and often requires the use of tools such as crowbars, resulting in high labor intensity and long construction time. Summary of the Invention

[0004] Based on this, it is necessary to provide a connection node between prefabricated beams and cast-in-place structures that improves the above defects, in order to address the problem that the reinforcement of prefabricated beams is difficult to insert during assembly, resulting in high work intensity and long construction time.

[0005] A connection node between a precast beam and a cast-in-place structure, comprising two cast-in-place structures and precast beams connected at opposite ends thereof to the two cast-in-place structures;

[0006] A steel cage is embedded in the cast-in-place structure;

[0007] The prefabricated beam includes a prefabricated layer, a surface reinforcement, and a plurality of first stirrups, each of the first stirrups being fixedly connected to the upper side of the prefabricated layer, and the plurality of first stirrups being spaced apart along the longitudinal direction of the prefabricated layer to form an interlaced channel extending along the longitudinal direction of the prefabricated layer;

[0008] The ribs include two sub-ribs, each of which includes opposite anchoring ends and insertion ends. The insertion ends of the two sub-ribs respectively penetrate into the insertion channel from opposite ends of the prefabricated layer and are fixedly connected to each other. The anchoring ends of the two sub-ribs are respectively fixedly connected to the corresponding steel cage in the cast-in-place structure.

[0009] At the connection node between the above-mentioned prefabricated beam and the cast-in-place structure, the reinforcement includes two sub-reinforcements. The insertion ends of the two sub-reinforcements can be inserted into the insertion channel through the opposite ends of the prefabricated beam, that is, pass through the first stirrups in sequence. When the two sub-reinforcements are inserted into place, the insertion ends of the two sub-reinforcements are fixedly connected, and the anchoring ends of the two sub-reinforcements are fixedly connected to the steel cages in the two cast-in-place structures. In this way, the present invention utilizes the insertion ends of the two sub-reinforcements to insert the first stirrups, avoiding the insertion of the anchoring ends into the first stirrups, making the insertion operation more convenient, and eliminating the need for tools such as crowbars, thereby reducing work intensity and shortening construction time.

[0010] In one embodiment, the prefabricated beam further includes a cast-in-place layer formed on the upper side of the prefabricated layer, and a plurality of the first stirrups are pre-embedded in the cast-in-place layer.

[0011] In one embodiment, the cast-in-place layer and the two cast-in-place structures are cast integrally.

[0012] In one embodiment, the interpenetrating ends of the two sub-ribbons are welded to each other.

[0013] In one embodiment, the insertion ends of the two sub-ribbons overlap by a first preset length, and the overlapping portions of the insertion ends of the two sub-ribbons are welded together.

[0014] In one embodiment, the first preset length is greater than or equal to 1×lae.

[0015] In one embodiment, the gluten comprises two pieces, and the two pieces of gluten are arranged side by side in the interlaced channel.

[0016] In one embodiment, in the longitudinal direction of the prefabricated layer, the welded connections of the interlaced ends of the two ribs are staggered.

[0017] In one embodiment, in the longitudinal direction of the prefabricated layer, the welding connection between the two sub-ribbons of the two ribs is located between the middle and one end of the prefabricated layer.

[0018] In one embodiment, the two sub-gluten bars of the gluten are respectively tied and fixed to the corresponding first stirrups. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 Schematic diagram of the connection node between the precast beam and the cast-in-place structure in one embodiment of the present invention. DETAILED DESCRIPTION

[0020] To facilitate understanding of the present invention, the present invention will be described more fully below with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the accompanying drawings. However, the present invention may be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and comprehensive understanding of the present disclosure.

[0021] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly attached to the other element or there may be an intermediate element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only.

[0022] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this invention pertains. The terms used in this specification of the present invention are for the purpose of describing specific embodiments only and are not intended to limit the present invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0023] like Figure 1 As shown, a connection node between a precast beam and a cast-in-place structure provided in one embodiment of the present invention includes a precast beam 20 and two cast-in-place structures 10. The two cast-in-place structures 10 are arranged opposite to each other, and the opposite ends of the precast beam 20 are respectively connected to the two cast-in-place structures 10. Specifically, the cast-in-place structure 10 can be a cast-in-place main beam, which is the main load-bearing beam. The precast beam 20 is a branch (i.e., a secondary beam) of the cast-in-place main beam, which is attached to the cast-in-place main beam and has a smaller load-bearing capacity. It can be understood that the cast-in-place structure 10 can also be other reinforced concrete structures, which is not limited here.

[0024] The precast beam 20 includes a precast layer 22, a face bar 26, and a plurality of first stirrups 24. Each first stirrup 24 is fixedly connected to the upper side of the precast layer 22, and the plurality of first stirrups 24 are spaced apart along the longitudinal direction of the precast layer 22 to form an interlaced channel extending along the longitudinal direction of the precast layer 22.

[0025] A reinforcement cage 12 is pre-embedded within the cast-in-place structure 10. The reinforcement bar 26 comprises two sub-reinforcements 261, each of which includes opposing anchoring ends 261b and insertion ends 261a. The insertion ends 261a of the two sub-reinforcements 261 extend through the insertion passages at opposite ends of the precast layer 22 and are fixedly connected to each other, forming a single, integrated reinforcement bar 26. The anchoring ends 261b of the two sub-reinforcements 261 are each fixedly connected to the corresponding reinforcement cage 12 within the cast-in-place structure 10, thereby enhancing the connection strength between the precast beam 20 and the cast-in-place structure 10 at its ends.

[0026] At the connection node between the above-mentioned precast beam and the cast-in-place structure, the reinforcement 26 includes two sub-reinforcements 261. The insertion ends 261a of the two sub-reinforcements 261 can be inserted into the insertion channel through the opposite ends of the precast beam 20, that is, pass through the first stirrup 24 in sequence. When the two sub-reinforcements 261 are inserted into place, the insertion ends 261a of the two sub-reinforcements 261 are fixedly connected, and the anchoring ends 261b of the two sub-reinforcements 261 are respectively fixedly connected to the steel cages 12 in the two cast-in-place structures 10. In this way, the present invention utilizes the insertion ends 261a of the two sub-reinforcements 261 to insert the first stirrup 24, avoiding the insertion of the anchoring end 261b into the first stirrup 24, making the insertion operation more convenient, without the need for tools such as crowbars, reducing the work intensity, and shortening the construction time.

[0027] It should be noted that, for the convenience of observation, Figure 1 Only the connection structure of one end of the precast beam 20 and the cast-in-place structure 10 is shown. The connection structure of the other end of the precast beam 20 and the other cast-in-place structure 10 is similar, so it is not shown in FIG. Figure 1 Shown in.

[0028] In an embodiment of the present invention, the prefabricated beam 20 further includes a cast-in-place layer (not shown) formed on the upper side of the prefabricated layer 22. A plurality of first stirrups 24 are embedded in the cast-in-place layer. Since the first stirrups 24 are fixedly connected to the prefabricated layer 22 and embedded in the cast-in-place layer, the bonding strength between the prefabricated layer 22 and the cast-in-place layer of the prefabricated beam 20 is enhanced. It can be understood that since the ribs 26 are inserted into the interlaced channel surrounded by the plurality of first stirrups 24, the ribs 26 are also embedded in the cast-in-place layer, and the opposite ends of the ribs 26 (i.e., the anchoring ends 261b of the two sub-ribs 261) are located outside the cast-in-place layer to facilitate anchoring into the cast-in-place structure 10.

[0029] Specifically in the embodiment, the cast-in-situ layer of the precast beam 20 is integrally cast with the cast-in-situ structure 10. Thus, by integrally casting the precast layer 22 of the precast beam 20 with the cast-in-situ structure 10, the connection between the precast beam 20 and the cast-in-situ structure 10 is achieved.

[0030] In this embodiment, the construction steps of the connection node between the precast beam and the cast-in-place structure are as follows:

[0031] Hoisting the precast layer 22 of the precast beam 20 between the two cast-in-place structures 10;

[0032] Provide a steel cage 12 within the cast-in-place structure 10;

[0033] Insert the insertion ends 261a of the two sub-reinforcements 261 of the reinforcement 26 into the insertion channel from both ends of the precast beam 20, and fix the insertion ends 261a of the two sub-reinforcements 261 to each other, and fix the anchoring ends 261b of the two sub-reinforcements 261 to the reinforcement cages 12 in the two cast-in-place structures 10 respectively;

[0034] The cast-in-situ layer of precast beams 20 and two cast-in-situ structures 10 are formed by pouring.

[0035] It is understandable that in order to cast and form the cast-in-place layer and the two cast-in-place structures 10, it is also necessary to install formwork to enclose the casting space. Furthermore, to facilitate the insertion of the sub-reinforcements 261, the formwork on the side of the cast-in-place structure 10 facing away from the precast beams 20 needs to be installed after the sub-reinforcements 261 are inserted into place to avoid interference between the sub-reinforcements 261 and the formwork.

[0036] In the embodiment of the present invention, the insertion ends 261 a of the two sub-ribs 261 are welded to each other, which is beneficial to ensure the structural strength of the prefabricated beam 20 .

[0037] In some embodiments, the insertion ends 261a of the two sub-ribs 261 of the rib 26 overlap by a first predetermined length in the longitudinal direction of the prefabricated layer 22. The overlapping portion of the insertion ends 261a of the two sub-ribs 261 is welded together. This helps ensure the connection strength of the two sub-ribs 261.

[0038] Specifically in this embodiment, the first preset length is greater than or equal to 1×1ae. Here, 1ae represents the seismic anchorage length of the longitudinal tensile reinforcement. The calculation of 1ae is well known in the art and will not be described in detail here. This helps ensure the welded connection strength of the two sub-rebars 261.

[0039] In some embodiments, the prefabricated beam 20 includes two ribs 26 , which are arranged side by side in the interlaced channel. Thus, the provision of two ribs 26 is beneficial for improving the structural strength of the prefabricated beam 20 .

[0040] Specifically, in this embodiment, the welded joints of the two ribs 26 are staggered in the longitudinal direction of the prefabricated layer 22. Furthermore, the welded joints of the two ribs 26 are spaced apart by a second predetermined length in the longitudinal direction of the prefabricated layer 22. This second predetermined length is 0.2 × 1a to 0.4 × 1a. Preferably, the second predetermined length is 0.3 × 1a. This helps ensure the structural strength of the prefabricated beam 20.

[0041] Specifically in the embodiment, in the longitudinal direction of the prefabricated layer 22, the welded connection between the two sub-ribs 261 of the two ribs 26 is located between the middle of the prefabricated layer 22 and one end of the prefabricated layer 22. Preferably, in the longitudinal direction of the prefabricated layer 22, the welded connection between the two sub-ribs 261 of the two ribs 26 is located at one-third of the prefabricated layer 22 and is staggered.

[0042] In the embodiment of the present invention, the two sub-gluten 261 of the gluten 26 are respectively tied and fixed with the corresponding first stirrup 24. In this way, after the two sub-gluten 261 of the gluten 26 are inserted into place, the sub-gluten 261 is tied to the first stirrup 24 to fix the gluten 26.

[0043] In an embodiment of the present invention, the steel cage 12 within the cast-in-place structure 10 includes four main bars 121 and a plurality of second stirrups 123. Generally, the second stirrups 123 are rectangular and spaced apart along the longitudinal direction of the cast-in-place structure 10. The four main bars 121 are partially tied to the corners of each second stirrup 123, thereby forming the steel cage 12. Specifically, in this embodiment, the steel cage 12 also includes waist bars 125, which are arranged between adjacent main bars 121 and tied to the second stirrups 123, thereby increasing the strength of the steel cage 12.

[0044] It is understood that the shape of the second stirrup 123 is not limited to a rectangle, and can also be other shapes, which is not limited here. The number of the main bars 121 is not limited to four, and can be set according to the shape of the second stirrup 123, which is not limited here.

[0045] In an embodiment of the present invention, the anchoring end 261b of the sub-reinforcement 261 is bent to form a curved anchor. Alternatively, the anchoring end 261b of the sub-reinforcement 261 is bent 90° to form the curved anchor. This anchoring into the cast-in-place structure 10 helps enhance the connection strength between the precast beam 20 and the cast-in-place beam.

[0046] It should be noted that the anchoring end 261b is not limited to being anchored in the cast-in-place structure 10 through a bent anchor structure, and can also be anchored through other anchoring structures, which is not limited here.

[0047] Specifically in the embodiment, the anchoring end 261b of the sub-surface reinforcement 261 is tied or welded to the main reinforcement and / or waist reinforcement.

[0048] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0049] The above-described embodiments merely illustrate several implementations of the present invention, and while their descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the patent for this invention shall be determined by the appended claims.

Claims

1. A connection node between a prefabricated beam and a cast-in-place structure, characterized in that: It comprises two cast-in-place structures and prefabricated beams connected to the two cast-in-place structures at opposite ends; A steel cage is embedded in the cast-in-place structure; The prefabricated beam includes a prefabricated layer, a surface reinforcement, and a plurality of first stirrups, each of the first stirrups being fixedly connected to the upper side of the prefabricated layer, and the plurality of first stirrups being spaced apart along the longitudinal direction of the prefabricated layer to form an interlaced channel extending along the longitudinal direction of the prefabricated layer; The ribs include two sub-ribs, each of which includes an opposite anchoring end and an insertion end. The insertion ends of the two sub-ribs respectively penetrate the insertion channel from opposite ends of the prefabricated layer and are fixedly connected to each other. The anchoring ends of the two sub-ribs are respectively fixedly connected to the corresponding steel cage in the cast-in-place structure. The gluten comprises two pieces, and the two pieces of gluten are arranged side by side in the interlaced channel; The inserted ends of the two sub-gluten bars are welded to each other, and in the longitudinal direction of the prefabricated layer, the welded connections of the inserted ends of the two gluten bars are staggered; the welded connections of the two sub-gluten bars of the two gluten bars are located between the middle and one end of the prefabricated layer.

2. The connection node between the precast beam and the cast-in-place structure according to claim 1, characterized in that: The prefabricated beam further includes a cast-in-place layer formed on the upper side of the prefabricated layer, and a plurality of the first stirrups are pre-embedded in the cast-in-place layer.

3. The connection node between the precast beam and the cast-in-place structure according to claim 2, characterized in that: The cast-in-situ layer and the two cast-in-situ structures are cast in one piece.

4. The connection node between a precast beam and a cast-in-place structure according to claim 1, characterized in that: The insertion ends of the two sub-ribbons overlap by a first preset length, and the overlapping parts of the insertion ends of the two sub-ribbons are welded together.

5. The connection node between the precast beam and the cast-in-place structure according to claim 4, characterized in that: The first preset length is greater than or equal to 1×lae.

6. The connection node between a precast beam and a cast-in-place structure according to claim 1, characterized in that: The two sub-gluten bars of the gluten are respectively tied and fixed to the corresponding first stirrups.

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