Upper and lower layer connecting structure of prefabricated part

Abstract

The utility model discloses an upper layer and lower layer connecting structure of a prefabricated part, which comprises an upper layer wallboard, a lower layer wallboard, a floor located between the upper layer wallboard and the lower layer wallboard, and upper layer and lower layer vertical connecting steel bars, a cast-in-place cavity is constructed at the bottom of the upper layer wallboard, and a concave-convex structure is constructed on the inner wall of the cast-in-place cavity; the upper-layer and lower-layer vertical connecting steel bars extend out of the cast-in-place cavity in the top of the lower-layer wallboard, penetrate through the floor slab and at least extend into the position, corresponding to the concave-convex structure, in the cast-in-place cavity in the bottom of the upper-layer wallboard; the edge bottom surface of the floor slab is supported on the top surface edge of the lower-layer wall plate or the top surface edge of a beam at the top of the lower-layer wall plate; the horizontal steel bars at the side ends of the floor slab extend out of the middle line of the lower-layer wall plate or beam.

Description

Technical Field

[0001] The utility model relates to the technical field of prefabricated components, in particular to an upper and lower layer connection structure of prefabricated components. Background Art

[0002] At present, when the upper and lower wall panels in a building are connected, it is necessary to punch the cast-in-place cavity at the bottom of the upper wall panel to enhance the bonding strength between the cast-in-place concrete and the inner wall of the cavity. However, punching consumes a lot of water resources during the production of prefabricated components, and easily produces pollutants such as mud, which is not conducive to environmental protection. In addition, when the floor slab is connected to the wall or beam, support columns need to be set under the floor slab to ensure the support strength of the floor slab. However, this increases the construction process and cost and reduces construction efficiency.

[0003] In view of this, the present utility model is proposed. Utility Model Content

[0004] The purpose of the utility model is to overcome the above technical deficiencies and provide an upper and lower layer connection structure of prefabricated components to solve the technical problems in the related art.

[0005] In order to achieve the above technical purpose, the utility model adopts the following technical solutions:

[0006] According to one aspect of the utility model, a prefabricated upper and lower connection structure is provided, comprising an upper wall panel, a lower wall panel, a floor panel located between the upper wall panel and the lower wall panel, and upper and lower vertical connection steel bars, wherein the bottom of the upper wall panel is configured with a cast-in-place cavity, and the inner wall of the cast-in-place cavity is configured with a concave-convex structure; the upper and lower vertical connection steel bars extend from the cast-in-place cavity at the top of the lower wall panel, pass through the floor panel, and extend at least into the cast-in-place cavity at the bottom of the upper wall panel at a position corresponding to the concave-convex structure;

[0007] The bottom edge of the floor slab is supported on the top edge of the lower wall slab or the top edge of the beam at the top of the lower wall slab; the horizontal steel bars at the side ends of the floor slab extend over the center line of the lower wall slab or the beam.

[0008] Optionally, the side end of the floor slab includes horizontal stirrups with closed ends; the top end of the floor slab or beam is also provided with one or more beam reinforcements arranged along the length direction of the floor slab or beam, and the beam reinforcements pass through the horizontal stirrups.

[0009] Optionally, when the upper wall panels and the lower wall panels are inner pages of the exterior wall, the floor slabs are only arranged on the inner sides of the upper wall panels and the lower wall panels, and the beam reinforcement is located on the outer sides of the upper and lower vertical connecting steel bars.

[0010] Optionally, the edge bottom surface of the floor slab is directly supported on the top edge of the lower wall panel or beam, or the floor slab is a composite floor slab with a small upper area and a large lower area, and the edge bottom surface of the composite floor slab is indirectly supported on the top edge of the lower wall panel or beam through a cast-in-place structure.

[0011] Optionally, the concave-convex structure includes one or more layers, each layer of the concave-convex structure includes a boss protruding horizontally along the thickness direction of the cast-in-place cavity, the bottom end of the boss extends downward and gradually narrows along the thickness direction of the cast-in-place cavity to form a ditch structure that is wide at the top and narrow at the bottom.

[0012] Optionally, the upper and lower layers of vertical connecting steel bars are steel bars with closed ends or straight steel bars.

[0013] The utility model provides a connection structure of upper and lower layers of prefabricated components, in which a concave-convex structure is constructed in the cast-in-place cavity at the bottom of the wall panel. Compared with punching, it can be directly prefabricated, which is more environmentally friendly. Moreover, this concave-convex structure can increase the bonding area between the cast-in-place concrete and the inner wall of the cast-in-place area, and improve the structural strength of the connection between the upper and lower wall panels. In addition, the edge bottom surface of the floor slab is supported on the top edge of the wall panel or beam, and the floor slab is supported by the wall panel or beam. It does not need to rely on support columns, and can obtain stable support, which makes the process more efficient. In addition, the horizontal steel bars at the side ends of the floor slab extend over the center line of the wall panel or beam, so that the horizontal steel bars can be combined with the cast-in-place concrete to improve the connection strength of the floor slab, especially when the floor slabs are arranged on both sides of the wall panel, the horizontal steel bars of the floor slabs on both sides extend over the center line to approach the other side of the floor slab, which increases the bonding area with the cast-in-place concrete and helps to improve the stability of the structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 A structural schematic diagram of the upper and lower layer connection structure of a prefabricated component is provided for an embodiment of the utility model (a concave-convex structure of one layer);

[0015] Figure 2 A schematic structural diagram of a prefabricated component upper and lower layer connection structure (multi-layer concave-convex structure, vertical connecting steel bars with closed ends) is provided for an embodiment of the utility model;

[0016] Figure 3 A structural schematic diagram of the upper and lower layer connection structure of a prefabricated component is provided for an embodiment of the utility model (straight vertical connecting steel bars);

[0017] Figure 4 A structural schematic diagram of an upper and lower layer connection structure of a prefabricated component (upper and lower double ring anchors) is provided for an embodiment of the utility model;

[0018] Figure 5A structural schematic diagram of a prefabricated upper and lower layer connection structure (composite floor slab) is provided for an embodiment of the utility model;

[0019] Figure 6 A structural schematic diagram of the upper and lower layer connection structure of a prefabricated component is provided for an embodiment of the utility model (straight vertical connecting steel bars, a beam bar passing horizontally);

[0020] Figure 7 A schematic diagram of the structure of the upper and lower layers of the prefabricated component connection structure is provided for the embodiment of the utility model (vertical connecting steel bars with closed ends and a beam bar passing horizontally);

[0021] Figure 8 A structural schematic diagram of the upper and lower layer connection structure of a prefabricated component is provided for an embodiment of the utility model (straight vertical connecting steel bars, horizontally passing multiple beam bars);

[0022] Fig. 9 A schematic diagram of the structure of the upper and lower layers of the prefabricated component connection structure is provided for the embodiment of the utility model (vertical connecting steel bars with closed ends and multiple beam bars passing horizontally);

[0023] Fig.10 A schematic diagram of the structure of the upper and lower layers of the prefabricated component connection structure is provided for the embodiment of the utility model (vertical connecting steel bars with closed ends and multiple beam bars passing horizontally);

[0024] Fig.11 A schematic diagram of the structure of the upper and lower layers of a prefabricated component connection structure is provided for an embodiment of the utility model (without an insulating exterior wall);

[0025] In the figure:

[0026] 1-upper wall panel; 2-lower wall panel; 3-floor slab; 4-upper and lower layer vertical connecting steel bars; 5-cast-in-place cavity; 6-concave-convex structure; 7-horizontal steel bars; 8-outer leaf; 9-insulation layer; 10-beam reinforcement; 31-lower layer; 32-cast-in-place structure. DETAILED DESCRIPTION

[0027] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0028] The utility model provides a prefabricated component upper and lower layer connection structure, combined with Figure 1-11, including wall panels and floor panels. For the convenience of introduction, the wall panels specifically include an upper wall panel 1, a lower wall panel 2, a floor panel 3 located between the upper wall panel 1 and the lower wall panel 2, and upper and lower vertical connecting steel bars 4. The bottom of the upper wall panel 1 is constructed with a cast-in-place cavity 5, and the inner wall of the cast-in-place cavity 5 is constructed with a concave-convex structure 6; the upper and lower vertical connecting steel bars 4 extend from the cast-in-place cavity 5 at the top of the lower wall panel 2, pass through the floor panel 3, and at least extend into the cast-in-place cavity 5 at the bottom of the upper wall panel 1 at a position corresponding to the concave-convex structure 6.

[0029] In this embodiment, the concave-convex structure 6 includes one or more layers, and each layer of the concave-convex structure includes a boss protruding horizontally along the thickness direction of the cast-in-place cavity. The bottom end of the boss extends downward and gradually narrows along the thickness direction of the cast-in-place cavity to form a ditch structure that is wide at the top and narrow at the bottom. The "anti-ditch" type force-bearing structure formed in this way is more reasonable. Since the concrete is poured from top to bottom, this force-bearing structure is more conducive to preventing the cast-in-place concrete from detaching from the inner wall of the cast-in-place cavity 5 due to its own weight, thereby improving the bonding strength between the new and old concrete.

[0030] At least one side of the lower wall panel 2 or beam is provided with a floor panel 3, and the bottom edge of the floor panel 3 is supported on the top edge of the lower wall panel 2 or beam, so that the floor panel 3 can obtain the support of the wall panel, thereby improving the stability of the structure. The horizontal steel bars 7 at the side ends of the floor panel 3 extend over the center line of the wall panel or beam to increase the bonding strength with the concrete. It should be understood that in this embodiment, the floor panel 3 is supported by the top edge of the lower wall panel 2 as an example. In some other embodiments, the floor panel 3 can also be supported by the beam above the lower wall panel 2.

[0031] When the floor slab 3 is distributed along the thickness direction of the wall panel, it is located on one side or both sides of the wall panel. For example, when the wall panel is an interior wall, the floor slab 3 is located on both sides of the wall panel. When the wall panel is an exterior wall panel, such as a sandwich exterior wall, it usually includes an outer page 8, an insulation layer 9 and an inner page, wherein the wall panel is used as an inner page. In this case, the floor slab 3 is only located on one side of the wall panel, i.e., the inner side.

[0032] As introduced in the previous embodiment, floor slabs 3 are arranged on both sides of the wall panel or beam. At this time, the horizontal steel bars 7 at the side ends of each floor slab 3 extend over the center line of the wall panel or beam, and the horizontal steel bars 7 of the floor slabs 3 are staggered with each other in the length direction of the wall panel or beam. The area of ​​the floor slabs 3 on both sides between the top surfaces of the wall panels or beams is a cast-in-place area.

[0033] The horizontal steel bars 7 at the side ends of the floor slab 3 are horizontal stirrups with closed ends; the top of the floor slab 3 or the beam is also provided with beam bars 10 arranged along the length direction of the floor slab 3 or the beam, and the beam bars 10 pass through the horizontal stirrups to enhance the bonding strength between the steel bars and the cast-in-place concrete.

[0034] As described in the above embodiments, the floor 3 has a cast-in-place cavity 5 extending to the top; the connection structure also includes upper and lower vertical connecting steel bars 4, which can be inserted into the cast-in-place cavity 5 later or in the form of prefabricated steel bars for connecting the upper and lower wall panels. In one embodiment, the upper and lower vertical connecting steel bars 5 are closed at both ends, or can be linear steel bars, and the number can be one or more.

[0035] In this embodiment, if it is an exterior wall, the floor slab 3 is only provided on one side of the wall panel, that is, the inner side. Figure 6-9 The beam reinforcement 10 is located outside the upper and lower vertical connecting reinforcements 4, which makes the overall force-bearing structure more reasonable and stable.

[0036] In the foregoing embodiments, the edge bottom surface of the floor slab 3 is directly supported on the top edge of the wall panel or beam. In other embodiments, the floor slab 3 includes an upper layer and a lower layer 31, wherein the upper layer has a smaller area and the lower layer 31 has a larger area. The floor slab of this structure is called a composite floor slab, and the edge bottom surface of the composite floor slab is indirectly supported on the top edge of the lower wall panel 2 or beam through a cast-in-place structure 32.

[0037] In indirect support, if composite floor slabs are arranged on both sides of the wall panel or beam, the horizontal steel bars 7 at the side ends of each composite floor slab extend over the center line of the wall panel or beam, and the horizontal steel bars 7 of the floor slab 3 are staggered with each other in the length direction of the wall panel or beam, and the upper layer of the composite floor slabs on both sides between the top surfaces of the wall panels or beams is a cast-in-place area.

[0038] The embodiment of the utility model further provides a method for connecting the upper and lower layer connection structures of prefabricated components, which is used to realize the upper and lower layer connection structures of the prefabricated components. The method comprises:

[0039] A floor slab is arranged above the lower wall slab 2 or beam, so that the bottom edge of the floor slab 3 is supported on the top edge of the lower wall slab 2 or the top edge of the beam on the top of the lower wall slab 2, and the horizontal steel bars 7 at the side ends of the floor slab 3 extend over the center line of the lower wall slab 2 or beam;

[0040] An upper wall panel 1 is arranged above the floor panel 3;

[0041] After pouring concrete into the cast-in-place cavities 5 of the upper wall panels 1 and the lower wall panels 2, the cast-in-place concrete is combined with the concave-convex structure 6 on the inner side of the upper wall panels.

[0042] The method further comprises: if the side end of the floor slab 3 comprises horizontal stirrups with closed ends; then:

[0043] One or more beam reinforcements 10 are arranged along the length direction of the floor slab 3 or the beam, and the beam reinforcement 10 passes through the horizontal stirrups.

[0044] When the upper wall panels 1 and the lower wall panels 2 are inner pages of the exterior wall, the floor panels 3 are only arranged on the inner sides of the upper wall panels 1 and the lower wall panels 2, and the method further includes:

[0045] The beam reinforcement 10 is arranged outside the upper and lower vertical connecting reinforcements 4. Its specific function is the same as that described in the above embodiment, and will not be repeated here.

[0046] In the above embodiments, when the end of the horizontal steel bar 7 has a closed structure, the closed structure can have a variety of structures, including but not limited to square, approximately square, ring, etc. The specific shape does not constitute a limitation on the protection scope of the present utility model.

[0047] When the above connection structure is applied to an exterior wall, it can be an exterior wall with a thermal insulation layer or an exterior wall without a thermal insulation layer.

[0048] The above are only preferred implementations of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. A prefabricated component upper and lower layer connection structure, characterized in that: The invention comprises an upper wall panel, a lower wall panel, a floor panel located between the upper wall panel and the lower wall panel, and upper and lower vertical connecting steel bars, wherein the bottom of the upper wall panel is configured with a cast-in-place cavity, and the inner wall of the cast-in-place cavity is configured with a concave-convex structure; the upper and lower vertical connecting steel bars extend from the cast-in-place cavity at the top of the lower wall panel, pass through the floor panel, and at least extend into the cast-in-place cavity at the bottom of the upper wall panel at a position corresponding to the concave-convex structure; The bottom edge of the floor slab is supported on the top edge of the lower wall slab or the top edge of the beam at the top of the lower wall slab; the horizontal steel bars at the side ends of the floor slab extend over the center line of the lower wall slab or the beam.

2. The upper and lower layer connection structure of prefabricated components according to claim 1 is characterized in that: The side ends of the floor slab include horizontal stirrups with closed ends; the top end of the floor slab or beam is also provided with one or more beam reinforcements arranged along the length direction of the floor slab or beam, and the beam reinforcements pass through the horizontal stirrups.

3. The upper and lower layer connection structure of prefabricated components according to claim 2 is characterized in that: When the upper wall panels and the lower wall panels are the inner pages of the exterior wall, the floor slabs are only arranged on the inner sides of the upper wall panels and the lower wall panels, and the beam reinforcement is located on the outer sides of the upper and lower vertical connecting reinforcements.

4. The upper and lower layer connection structure of prefabricated components according to claim 1 is characterized in that: The edge bottom surface of the floor slab is directly supported on the top edge of the lower wall slab or beam, or the floor slab is a composite floor slab with a small upper area and a large lower area, and the edge bottom surface of the composite floor slab is indirectly supported on the top edge of the lower wall slab or beam through a cast-in-place structure.

5. The upper and lower layer connection structure of prefabricated components according to claim 1, characterized in that: The concave-convex structure includes one or more layers, each layer of the concave-convex structure includes a boss protruding horizontally along the thickness direction of the cast-in-place cavity, the bottom end of the boss extends downward and gradually narrows along the thickness direction of the cast-in-place cavity to form a ditch structure that is wide at the top and narrow at the bottom.

6. The upper and lower layer connection structure of prefabricated components according to claim 1, characterized in that: The upper and lower layers of vertical connecting steel bars are steel bars with closed ends or straight steel bars.

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