Upper and lower floor connecting node mounting structure of full-fabricated building system

Abstract

The utility model relates to the technical field of fabricated buildings, and discloses an upper and lower floor connecting node mounting structure of a fully fabricated building system, which comprises a precast beam and vertical members positioned on the upper and lower sides of the precast beam, connecting steel bars are distributed in the precast beam in the vertical direction, the ends of the connecting steel bars located at the upper end and the lower end are bent in the thickness direction of the precast beam and penetrate out of the precast beam outwards, and the parts, penetrating out of the precast beam, of the connecting steel bars are linear. Connecting belts are arranged between the vertical components and the precast beams, the distribution bars located in the vertical components on the lower layer and the connecting steel bars penetrating out of the precast beams are located in the connecting belts, and the connecting belts are filled with concrete. A plurality of grouting pipe fittings are embedded in the bottoms of the vertical components located on the upper layer, the connecting steel bars in the vertical components located on the lower layer extend upwards into the grouting pipe fittings, and the grouting pipe fittings are filled with cement mortar. In practical application, the scheme solves the problems of long construction period and poor node forming quality consistency of the existing upper and lower layer connection.

Description

Technical Field

[0001] The utility model relates to the technical field of assembled buildings, and in particular to an upper and lower floor connection node installation structure of a fully assembled building system. Background Art

[0002] In building construction, the connection nodes of the upper and lower floors are the connection between the upper and lower load-bearing columns or shear walls and beams. The traditional construction method is on-site casting, which requires on-site reinforcement arrangement and casting template construction of beams, columns or shear walls, and then pouring concrete to connect the beams and columns or shear walls into a whole. The on-site casting construction method is not only labor-intensive and has a long construction period, but also the concrete curing and molding quality during on-site construction will be affected by weather, environmental conditions and the operation of construction personnel. The quality and connection strength of each connection node cannot be uniformly controlled, which can easily lead to a decrease in the stability of the overall building structure. Therefore, the applicant has developed a new prefabricated building system, in which columns or shear walls and beams are all prefabricated components, and only the components need to be assembled on site. However, there is a certain construction gap in the fully prefabricated connection between the prefabricated components in the existing building construction, and there is a lack of specific reference. Therefore, the applicant provides an installation structure for the upper and lower floor connection nodes of a fully prefabricated building system. Utility Model Content

[0003] The utility model aims to provide an upper and lower floor connection node installation structure of a fully assembled building system, so as to solve the problems of long upper and lower layer connection construction period and poor consistency of node molding quality in the prior art.

[0004] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: an upper and lower floor connection node installation structure of a fully assembled building system, comprising adjacent precast beams and vertical components located on the upper and lower sides of the precast beams, the precast beams and vertical components are both reinforced concrete structures, and the vertical components are provided with vertical connecting steel bars, distribution bars and transverse stirrups; connecting steel bars are distributed in the vertical direction in the precast beams, wherein the ends of the connecting steel bars located at the upper and lower ends are bent along the thickness direction of the precast beams and pass out of the precast beams outward, and the connecting steel bars pass through the precast beams in a straight line; a connecting belt is provided between the vertical components and the precast beams, the distribution bars of the vertical components located at the lower layer and the connecting steel bars passing through the precast beams are located in the connecting belts, and the connecting belts are filled with concrete; a plurality of grouting pipes are buried at the bottom of the vertical components located at the upper layer, and the connecting steel bars in the vertical components located at the lower layer extend upward into the grouting pipes, and the grouting pipes are filled with cement mortar.

[0005] The principles and advantages of this solution are:

[0006] 1. The prefabricated beams and vertical components in this solution are all prefabricated components that are standardized and produced in factories. During on-site construction, it is only necessary to position and assemble the components. There is no need to arrange a large number of steel bars, support formwork, or remove formwork as in the prior art. This greatly reduces on-site workload, improves on-site construction efficiency, and shortens the construction period.

[0007] 2. All components in this scheme are uniformly prefabricated in the factory, which greatly ensures the quality of each component and avoids the quality of concrete being easily affected by on-site factors during on-site pouring, which affects the molding quality of the connection nodes, thereby ensuring the stability of the upper and lower layer connection structures and the overall building structure.

[0008] 3. In this scheme, the connecting steel bars and distribution bars passing through the vertical components located in the lower layer and the connecting steel bars passing through the precast beams are all extended into the connecting belts, and the steel bars are staggered. The connecting belts are filled with concrete and form a whole with the staggered steel bars. At the same time, the connecting steel bars of the vertical components located in the lower layer are extended upward into the grouting pipe fittings. When the grouting pipe fittings are filled with cement mortar, the connection between the vertical components of the upper and lower layers is more stable, so that the structure between the precast beams and the vertical components of the upper and lower layers has higher strength and rigidity, and the connection between the upper and lower layers is more stable.

[0009] 4. In this scheme, the ends of the connecting steel bars in the vertical direction and located at the upper and lower ends of the precast beam are bent along the thickness direction of the precast beam and pass out of the precast beam. The part of the connecting steel bars passing through the precast beam is in a straight line. When multiple beams intersect, the amount of on-site steel bar adjustment is greatly reduced, effectively solving the problem of difficulty in lowering the precast beam.

[0010] Furthermore, the bottom of the connecting steel bar in the vertical member located in the upper layer extends into the grouting pipe.

[0011] The above arrangement enables the connecting steel bars between the vertical components of the upper and lower layers to be connected as a whole through cement mortar in the grouting pipe fittings. The structure at the connection has higher strength, rigidity and shear resistance, and the connection between the upper and lower vertical components is more stable.

[0012] Furthermore, an anchor plate is provided at the end of the connecting steel bar passing through the prefabricated beam.

[0013] In the above-mentioned setting, the anchor plate enhances the connection strength between the connecting steel bars and the concrete in the connecting belt. There is no need to bend the connecting steel bars outside the precast beam as in the prior art, which reduces the amount of steel bars used at the ends of the precast beams. It also effectively avoids the problem of difficulty in lowering precast beams when multiple beams intersect, thereby effectively improving construction efficiency.

[0014] Furthermore, a slurry layer is filled between the vertical components located at the upper layer and the connecting belt.

[0015] As a transition layer, the slurry layer can better adjust the height difference between the vertical components, connecting strips and precast beams on the upper layer, improve the bonding strength and integrity of the connection points, and the overall stability of the structure; at the same time, the slurry layer also has a certain flexibility, which can adapt to slight deformations caused by temperature differences or humidity changes, reduce stress concentration between precast beams of vertical components, and avoid cracks that may be caused by direct rigid connections.

[0016] Furthermore, a sealing mortar layer is provided around the slurry layer.

[0017] The above-mentioned arrangement provides a sealing mortar layer around the slurry layer to effectively prevent water vapor from penetrating into the interior of the structure, ensuring the connection stability between the vertical components and the adjacent precast beams. At the same time, the slurry layer and the sealing mortar layer make the vertical components and the precast beams have obvious layers, making subsequent maintenance inspections easier to locate.

[0018] Furthermore, the thickness of the slurry layer is 20 mm.

[0019] The thickness of the slurry layer is set to 20mm. On the one hand, it is to provide a more solid connection interface for the vertical components and precast beams on the upper layer, increase the stability of the overall structure, and reduce stress concentration when transmitting shear force and bending moment. On the other hand, it leaves enough room for adjustment for construction errors, compensates for the misalignment of the upper and lower plates, ensures a smooth and straight connection, and improves construction accuracy. The thicker mortar layer can more effectively block water vapor penetration, form a better waterproof barrier, prevent moisture from penetrating along the plate joints to the lower vertical components or precast beams, and protect the structure from moisture.

[0020] Furthermore, two adjacent grouting pipes are arranged alternately along the thickness direction of the wallboard at the bottom of the vertical component.

[0021] The above arrangement enables staggered overlap between the connecting steel bars of the upper and lower vertical components, which increases the connection strength between the two. The staggered arrangement of the grouting pipes makes the stress more dispersed and the load transfer more uniform, effectively reducing the stress concentration at the connection.

[0022] Furthermore, strip grooves are provided on the top of the vertical component located at the lower layer and on the two end surfaces facing each other of two adjacent precast beams, and the surface roughness of the strip grooves is greater than the surface roughness of the vertical component and the precast beam.

[0023] In the above arrangement, the concrete in the connection belt enters into the strip groove, which increases the bonding force between the concrete and the precast component, making the connection between the precast beam and the vertical component located at the lower layer more stable.

[0024] Furthermore, the vertical component located in the lower layer is detachably connected to an adjustable supporting device at the upper part of the side, and the adjustable supporting device includes a fixing plate and a supporting unit. The fixing plate is provided with two shaped holes and welded with a connecting piece, and the connecting piece is vertically provided with a mounting hole. The supporting unit includes a supporting plate and a supporting rod welded to the bottom of the supporting plate, and the supporting rod is threaded with an adjusting nut, and the support rod is inserted into the mounting hole.

[0025] The above arrangement makes it unnecessary to build a full-height scaffolding for support when installing the prefabricated beams as in the prior art, thereby reducing the construction process of scaffolding erection and disassembly, greatly improving construction efficiency; and when the horizontal height of the prefabricated beam needs to be adjusted, the adjustment nut can be screwed with a wrench to meet the on-site support height adjustment requirements, and the construction flexibility is higher.

[0026] Furthermore, bolt sleeves for fixing the adjustable supporting device are pre-embedded in the side surfaces of the vertical components located at the lower layer.

[0027] The adjustable support device is detachably fixed to the vertical member of the lower layer by the combination of bolts and bolt sleeves. The operation is simple and fast, which greatly improves the construction efficiency. The bolt connection makes it easy to disassemble and reuse the adjustable support device after the prefabricated beam is installed, reducing the construction cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a structural schematic diagram of an embodiment of the utility model.

[0029] Figure 2 It is a top view of the prefabricated beam in the embodiment of the utility model.

[0030] Figure 3 It is a schematic diagram of the structure of an adjustable supporting device used in an embodiment of the utility model.

[0031] Figure 4 for Figure 1 Enlarged view of part A. DETAILED DESCRIPTION

[0032] The following is further described in detail through specific implementation methods:

[0033] The figure marks in the drawings of the specification include: precast beam 1, upper vertical member 2, lower vertical member 3, connecting belt 4, connecting steel bar 5, grouting pipe fittings 6, grouting pipe 61, grouting pipe 62, slurry layer 7, sealing mortar layer 8, adjustable support device 9, fixing plate 91, connecting member 92, support plate 93, support rod 94, adjusting nut 95, anchor plate 10.

[0034] Example

[0035] like Figure 1 , Figure 2As shown in combination, an upper and lower floor connection node installation structure of a fully assembled building system includes a precast beam 1 and vertical components located on the upper and lower sides of the precast beam 1, the vertical components are an upper vertical component 2 and a lower vertical component 3, the precast beam 1 and the upper vertical component 2, the lower vertical component 3 are all reinforced concrete structures, and a connecting belt 4 is provided between the upper vertical component 2, the lower vertical component 3 and the two precast beams 1; a plurality of vertical connecting steel bars 5 and distribution bars are provided in the lower vertical component 3 and the upper vertical component 2, and the connecting steel bars 5 and the distribution bars are bound by transverse stirrups , the distribution bars in the lower vertical member 3 pass through the lower vertical member 3 upward and extend into the connection belt 4; multiple rows of connecting steel bars 5 are arranged in the vertical direction in the precast beam 1, wherein the connecting steel bars 5 at the upper and lower ends pass through the precast beam 1 outward and are horizontally bent along the thickness direction of the precast beam 1, and the bent portion is hidden in the precast beam 1, and the ends of the connecting steel bars 5 passing outward from the precast beam 1 are straight and are installed with anchor plates 10 at the ends, and extend into the connection belt 4, and the bending and avoiding of the connecting steel bars 5 of the precast beam 1 effectively avoids the problem of difficulty in lowering the precast beam 1 due to interference of steel bars when multiple beams intersect. The connection belt 4 is filled with concrete, and in this embodiment, the concrete is micro-expansion fine stone concrete, and the concrete, the connecting steel bars 5 and the distribution bars form a whole, so as to realize the connection and fixation between the two precast beams 1 and the upper vertical member 2 and the lower vertical member 3.

[0036] A plurality of grouting pipes 6 are buried at the bottom of the upper vertical member 2, and adjacent grouting pipes 6 are arranged in a staggered manner along the thickness direction of the upper vertical member 2, so as to ensure uniform stress dispersion and improve the structural strength of the connection point; the grouting pipe 6 includes a hollow pipe body, and a grouting pipe 61 and a grouting pipe 62 are transversely arranged on one side of the pipe body, and the grouting pipe 62 is located above the grouting pipe, and the length of the grouting pipe 62 is greater than the vertical distance between the top of the pipe body and the grouting pipe 62, so as to ensure that when the grouting pipe 62 discharges slurry, the top of the pipe body is saturated with grouting. The upper end of the connecting steel bar 5 in the lower vertical member 3 and the lower end of the connecting steel bar 5 in the upper vertical member 2 are both extended into the pipe body of the grouting pipe 6, and the length of the connecting steel bar 5 in the lower vertical member 3 extending into the pipe body is slightly greater than the length of the connecting steel bar 5 in the upper vertical member 2 extending into the pipe body, so as to ensure the stability of the connection structure between the upper vertical member 2 and the lower vertical member 3. In this solution, a grouting pipe 62 is provided to avoid the problem of unsaturated grouting in the pipe when blockage occurs in the pipe body. The specific method is to inject grout into the grouting pipe 61. If slurry comes out of the grouting pipe 62, it indicates that the grouting in the pipe body is saturated. Otherwise, it indicates that there is foreign matter blocking the pipe, which needs to be processed and grouting should be carried out again.

[0037] A slurry layer 7 is laid between the upper vertical component 2 and the connecting belt 4. The thickness of the slurry layer 7 is 20 mm. The slurry layer 7 is a high-strength grouting material. The periphery of the slurry layer 7 is filled with a sealing mortar layer 8 to prevent water vapor from penetrating into the structure and ensure the connection stability between the lower vertical component 3 and the adjacent prefabricated beam 1.

[0038] In order to enhance the connection stability between the concrete in the connecting belt 4 and the precast components, strip grooves are opened on the top of the lower vertical component 3 and the two end surfaces facing each other of the two adjacent precast beams 1. The surface roughness of the strip grooves is greater than the surface roughness of the lower vertical component 3 and the precast beam 1. The concrete in the connecting belt 4 enters the strip grooves, making the connection between the precast beam 1 and the lower vertical component 3 more stable.

[0039] like Figure 3 , Figure 4 As shown in the combination, bolt sleeves are buried in the upper part of both sides of the lower vertical member 3, and an adjustable supporting device 9 is fixed by bolt sleeve bolts. The adjustable supporting device includes a fixing plate 91 and a supporting unit. The fixing plate 91 is provided with two strip holes corresponding to the bolt sleeves and is welded with a connecting piece 92. The connecting piece 92 is vertically provided with a mounting hole. The supporting unit includes a supporting plate 93 and a supporting rod 94 welded to the bottom of the supporting plate 93. An adjusting nut 95 is threadedly connected to the supporting rod 94, and the support rod 94 is inserted into the mounting hole. When the prefabricated beam 1 is installed, bolts are passed through the strip holes to fix the adjustable supporting device 9 on the prefabricated beam, and then the prefabricated beam 1 is placed on the adjustable supporting device 9 for support. When the horizontal height of the prefabricated beam 1 needs to be adjusted, the adjusting nut 95 can be screwed with a wrench. In this way, there is no need to set up scaffolding to support the floor slab, thereby reducing the construction process of scaffolding erection and disassembly, greatly improving the construction efficiency. At the same time, after the construction of the prefabricated beam 1 is completed, the adjustable supporting device 9 can be removed from the bolt sleeve and reused.

[0040] A construction method for an upper and lower floor connection node installation structure of a fully assembled building system is as follows:

[0041] Adjustable support devices 9 are installed on both sides of the lower vertical member 3, and then the precast beam 1 is placed on the adjustable support devices for support and the end of the precast beam 1 is overlapped on the lower vertical member 3, and the horizontal height of the precast beam 1 is adjusted by screwing the adjusting nut 95; after the horizontal height of the precast beam 1 is adjusted, the concrete between the adjacent two precast beams 1 and the lower vertical member 3 is poured, and after the concrete solidifies, a 20mm thick slurry layer 7 is laid on it, and the grouting pipe 6 in the upper vertical member 2 is inserted into the connecting steel bar 5 on the lower vertical member 3 until the bottom of the upper vertical member 2 contacts the slurry layer 7. Grouting begins, and grouting is poured into the grouting pipe 6 from the grouting pipe 61 located below until slurry is discharged from the grouting pipe 62 located above, indicating that the slurry in the grouting pipe 6 is saturated, and grouting is stopped at this time, so that the upper vertical member 2 and the lower vertical member 3 are firmly connected as one.

[0042] The above is only an embodiment of the utility model, and the common knowledge such as the known specific technical solutions and / or characteristics in the solution is not described in detail here. It should be pointed out that for those skilled in the art, several deformations and improvements can be made without departing from the technical solution of the utility model, which should also be regarded as the protection scope of the utility model, and these will not affect the effect of the implementation of the utility model and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. The upper and lower floor connection node installation structure of the fully assembled building system is characterized by: It comprises adjacent precast beams and vertical members located at the upper and lower sides of the precast beams, the precast beams and vertical members are both reinforced concrete structures, the vertical members are provided with vertical connecting steel bars, distribution bars and transverse stirrups; the precast beams are provided with connecting steel bars distributed along the vertical direction, wherein the ends of the connecting steel bars located at the upper and lower ends are bent along the thickness direction of the precast beams and pass out of the precast beams outwards, and the connecting steel bars passing through the precast beams are in a straight line; a connecting belt is provided between the vertical members and the precast beams, the distribution bars of the vertical members located at the lower layer and the connecting steel bars passing through the precast beams are located in the connecting belts, and the connecting belts are filled with concrete; a plurality of grouting pipes are buried at the bottom of the vertical members located at the upper layer, the connecting steel bars in the vertical members located at the lower layer extend upwards into the grouting pipes, and the grouting pipes are filled with cement mortar.

2. The upper and lower floor connection node installation structure of the fully assembled building system according to claim 1 is characterized in that: The bottom of the connecting steel bars in the vertical members located in the upper layer extends into the grouting pipe fittings.

3. The upper and lower floor connection node installation structure of the fully assembled building system according to claim 2 is characterized in that: Anchor plates are provided at the ends of the connecting steel bars passing through the precast beams.

4. The upper and lower floor connection node installation structure of the fully assembled building system according to claim 3 is characterized in that: A slurry layer is filled between the vertical components located at the upper layer and the connecting belt.

5. The upper and lower floor connection node installation structure of the fully assembled building system according to claim 4 is characterized in that: A sealing mortar layer is provided around the slurry layer.

6. The upper and lower floor connection node installation structure of the fully assembled building system according to claim 5 is characterized in that: The thickness of the slurry layer is 20 mm.

7. The upper and lower floor connection node installation structure of the fully assembled building system according to claim 6 is characterized in that: Two adjacent grouting pipes are arranged alternately along the thickness direction of the wallboard at the bottom of the vertical component.

8. The upper and lower floor connection node installation structure of the fully assembled building system according to claim 7 is characterized in that: Strip grooves are provided on the top of the vertical component located at the lower layer and on the two end surfaces facing each other of two adjacent precast beams, and the surface roughness of the strip grooves is greater than the surface roughness of the vertical component and the precast beam.

9. The upper and lower floor connection node installation structure of the fully assembled building system according to claim 8, characterized in that: The vertical component located at the lower layer is detachably connected to an adjustable supporting device at the upper part of the side surface. The adjustable supporting device includes a fixing plate and a supporting unit. The fixing plate is provided with two shaped holes and is welded with a connecting piece. The connecting piece is vertically provided with a mounting hole. The supporting unit includes a supporting plate and a supporting rod welded to the bottom of the supporting plate. An adjusting nut is threaded on the supporting rod, and the support rod is inserted into the mounting hole.

10. The upper and lower floor connection node installation structure of the fully assembled building system according to claim 9, characterized in that: Bolt sleeves for fixing the adjustable supporting device are pre-buried on the side of the vertical member located at the lower layer.

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