A concrete modular box building node and construction method thereof

Abstract

The present invention relates to a concrete modular box building node and a construction method thereof. The concrete modular box building node includes a module box, a floor slab and a wall. The floor slab is formed by vertically splicing the top plate of the lower module box and the bottom plate of the upper module box. The wall is formed by horizontally splicing the wall panels of two module boxes on the same layer. The top plates and bottom plates of the two module boxes on the same layer are connected by horizontal short steel bars. A steel cage is provided on the top of the wall. The bottom two sides of the steel cage are respectively connected to the top of the two wall panels in the lower wall. The top two sides of the steel cage are respectively connected to the bottom of the two wall panels in the upper wall. A mortar layer is cast on the top surface of the top plate, and a post-cast concrete layer is cast between the two wall panels in the wall. The beneficial effects of the present invention are: reliable force transmission, rapid alignment and connection between the box modules can be achieved, the difficulty of module box connection construction is reduced, and the production and installation efficiency of the module box is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of building construction, and in particular to a concrete modular box building node and a construction method thereof. Background Art

[0002] To address labor shortages and environmental concerns in the current construction industry, prefabricated construction technology can be used to integrate the main components of a building's structural system, exterior envelope, interior decoration, equipment, and piping systems using factory-prefabricated components, which are then transported to the site for installation. This reduces construction complexity and labor costs. Buildings whose structural systems are composed of concrete components (prefabricated elements) are called prefabricated concrete buildings.

[0003] During the construction of traditional prefabricated concrete buildings, structural components such as beams, slabs, and columns prefabricated in the factory are transported to the construction site and connected to form the main structure. After the main structure is completed, subsequent water, heating, and electricity installation and decoration work are carried out. Due to the large number and variety of components, a large amount of handling and lifting work is required during the construction of the main structure, and the structural connections are cumbersome. The overall construction workload and labor costs are still high. Therefore, how to further reduce the workload and improve the construction and assembly efficiency is one of the problems that need to be solved in the current construction of prefabricated concrete buildings. Summary of the Invention

[0004] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a concrete modular box building node and a construction method thereof, so as to reduce the construction workload and improve the construction efficiency.

[0005] The purpose of the present invention is achieved through the following technical solutions:

[0006] A concrete modular box building node includes a module box prefabricated with concrete, and also includes a floor slab and a wall. The floor slab is formed by vertically splicing the top plate of the lower module box and the bottom plate of the upper module box. The wall is formed by horizontally splicing the wall panels of two module boxes on the same layer. The top plates and bottom plates of the two module boxes on the same layer are connected by horizontal short steel bars. A steel cage is provided on the top of the wall. The bottom sides of the steel cage are respectively connected to the tops of the two wall panels in the lower wall, and the top sides of the steel cage are respectively connected to the bottoms of the two wall panels in the upper wall. A mortar layer is cast on the top surface of the top plate, which covers the bottom of the steel cage and the horizontal short steel bars connected to the top plate. The horizontal short steel bars connected to the bottom plate are located on the surface of the mortar layer. A post-cast concrete layer is cast between the two wall panels in the wall.

[0007] Furthermore, grooves are provided at the connection between the wall panel and the top plate, and at the connection between the wall panel and the bottom plate in the wall body. Multiple groups of horizontal groove groups and multiple groups of vertical groove groups are provided at the grooves at equal intervals along the length direction of the grooves at the top and bottom of the wall body. The vertical groove groups and the horizontal groove groups are staggered with each other. The horizontal groove groups are used to place horizontal short steel bars, and the vertical groove groups are used to place steel bar cages.

[0008] Furthermore, the transverse slot group includes two opposite transverse slots, the two transverse slots in the transverse slot group at the top of the wall are respectively arranged on the top surface of the top plate of two module boxes on the same layer, and the two transverse slots in the transverse slot group at the bottom of the wall are respectively arranged on the bottom surface of the bottom plate of two module boxes on the same layer. There are multiple horizontal short steel bars and the multiple horizontal short steel bars correspond one-to-one to the multiple groups of transverse slot groups, and the two ends of the horizontal short steel bars are respectively inserted into the two transverse slots in the corresponding transverse slot groups.

[0009] Furthermore, the vertical slot group includes two opposite vertical slots, the two vertical slots in the vertical slot group at the top of the wall are respectively arranged at the top of the opposite plate surfaces of two wall panels in the wall, and the two vertical slots in the vertical slot group at the bottom of the wall are respectively arranged at the bottom of the opposite plate surfaces of two wall panels in the wall. The steel cage includes inverted U-shaped steel bars and straight steel bars. There are multiple inverted U-shaped steel bars and the multiple inverted U-shaped steel bars correspond one-to-one to the multiple groups of vertical slot groups. The middle parts of the top ends and the middle parts of the side ends of the multiple inverted U-shaped steel bars are connected by straight steel bars. The straight steel bars are located on the inner side of the inverted U-shaped steel bars. The bottom parts of the two side ends of the inverted U-shaped steel bars in the steel cage are respectively inserted into the two vertical slots in the corresponding vertical slot group at the top of the lower wall, and the top parts of the two side ends of the inverted U-shaped steel bars in the steel cage are respectively inserted into the two vertical slots in the corresponding vertical slot group at the bottom of the upper wall.

[0010] Furthermore, transverse connecting steel bars are pre-embedded on the two wall panels in the wall.

[0011] Furthermore, the present invention also provides a construction method for a concrete modular box building node, comprising the following steps:

[0012] S1. Hoist the two lower module boxes into place and splice them into the lower wall. Then, first place the horizontal short steel bars on the top of the lower wall, and then place the steel cage on the top of the lower wall.

[0013] S2. pouring a post-cast concrete layer between the two wall panels of the lower wall;

[0014] S3. Cast a mortar layer on the top surface of the roof of the two module boxes on the lower layer, and place short horizontal steel bars on the surface of the mortar layer corresponding to the transverse notch group at the bottom of the upper wall;

[0015] S4. Hoist the upper module box on top of the lower module box and assemble them into the upper wall, so that the ends of the horizontal short steel bars on the surface of the mortar layer are respectively inserted into the two horizontal slots in the corresponding horizontal slot group at the bottom of the upper wall, and the tops of the two side ends of the inverted U-shaped steel bars in the steel cage are respectively inserted into the two vertical slots in the corresponding vertical slot group at the bottom of the upper wall;

[0016] S5. Complete the construction of the multi-layer wall in sequence from bottom to top according to steps S1-S4.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. The present invention can realize rapid alignment and connection between box modules through the arrangement of horizontal notches, vertical notches, horizontal short steel bars and steel cages, reduce the difficulty of factory prefabrication and connection construction of module boxes, and improve the installation efficiency of module boxes.

[0019] 2. The modular box of the present invention is prefabricated in the factory, which can reduce the workload of splicing prefabricated concrete components on site, improve construction efficiency, and ensure project quality.

[0020] 3. The module box in the present invention can be directly used as a casting template for the post-cast concrete layer, reducing the workload of template construction.

[0021] 4. The present invention realizes the longitudinal connection between the box modules through the prefabricated steel cage. During the construction process, the steel cage can be hoisted and installed at one time, which greatly reduces the workload of on-site steel bar placement and positioning.

[0022] 5. The present invention can reduce labor costs as a whole, improve construction efficiency, and further improve the construction and technical level of building industrialization. While effectively reducing project costs and shortening construction periods, it ensures that building nodes have reliable mechanical properties. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the overall structure of the concrete modular box building node in the present invention;

[0024] Figure 2 Schematic diagram of the structure of the module box in the present invention;

[0025] Figure 3 Schematic diagram of the structure of the steel cage in the present invention;

[0026] Figure 4 Schematic diagram of the structure of the inverted U-shaped steel bar in the present invention;

[0027] Figure 5 It is a construction diagram of the concrete modular box building node in the present invention.

[0028] In the figure: 1. Top plate; 2. Bottom plate; 3. Wall panel; 4. Horizontal short steel bars; 5. Steel cage; 51. Inverted U-shaped steel bars; 52. Straight steel bars; 6. Mortar layer; 7. Post-poured concrete layer; 8. Slope; 9. Horizontal notch; 10. Vertical notch; 11. Horizontal connecting steel bars. DETAILED DESCRIPTION

[0029] The present invention will be further described below in conjunction with the accompanying drawings, but the protection scope of the present invention is not limited to the following description.

[0030] like Figure 1-Figure 5 As shown, a concrete modular box building node includes multiple layers of walls stacked from bottom to top, wherein each layer of wall is horizontally spliced ​​by wall panels 3 of two prefabricated concrete module boxes on the same layer, and the top plate 1 of the lower module box and the bottom plate 2 of the upper module box are vertically spliced ​​to form a floor slab.

[0031] like Figure 1 、 Figure 5 As shown, the top plates 1 and the bottom plates 2 of the two module boxes on the same layer are connected by horizontal short steel bars 4. A steel cage 5 is provided on the top of the wall. The bottom sides of the steel cage 5 are respectively connected to the tops of the two wall panels 3 in the lower wall, and the top sides of the steel cage 5 are respectively connected to the bottoms of the two wall panels 3 in the upper wall. A mortar layer 6 is cast on the top surface of the top plate 1. The mortar layer 6 covers the bottom of the steel cage 5 and the horizontal short steel bars 4 connected to the top plate 1. The horizontal short steel bars 4 connected to the bottom plate 2 are located on the surface of the mortar layer 6. A post-cast concrete layer 7 is cast between the two wall panels 3 in the wall.

[0032] When constructing the wall, first assemble the lower wall, and place the horizontal short steel bars 4 connected to the lower module box on the top of the lower wall, and place the steel cage 5 on the top of the lower wall, so that the two lower module boxes are connected on both sides of the top of the steel cage 5, and then pour the post-cast concrete layer 7 between the two wall panels 3 in the lower wall, pour the mortar layer 6 on the top surface of the top plate 1 of the lower module box, and then place the horizontal short steel bars 4 connected to the upper module box on the surface of the mortar layer 6, and finally hoist the upper module box on the top of the lower module box to form the upper wall, so that the lower module box is connected to the horizontal short steel bars 4 on the surface of the mortar layer 6 and the top of the steel cage 5 on both sides, completing the installation of the upper wall, and constructing the post-cast concrete layer 7 of the upper wall and the mortar layer 6 on the top of the upper module box, and completing the multi-layer wall construction in this cycle. In addition, if Figure 2 As shown, transverse connecting steel bars 11 are pre-embedded on the two wall panels 3 in the wall. After the wall construction is completed, the transverse connecting steel bars 11 are wrapped in the post-cast concrete layer 7, thereby improving the strength of the post-cast concrete layer 7 and making the connection between the two module boxes more secure.

[0033] In this embodiment, the module box is prefabricated with concrete in the factory, and the concrete interior of the module box is structurally reinforced by pre-embedded steel bars. This can reduce the workload of splicing prefabricated concrete components on site during wall construction, improve construction efficiency, and ensure project quality.

[0034] like Figure 2 、 Figure 5 As shown, the connection between the wall panel 3 and the top plate 1, and the connection between the wall panel 3 and the bottom plate 2 in the wall are provided with grooves 8. The top and bottom of the wall are located at the grooves 8. Multiple groups of horizontal slot groups and multiple groups of vertical slot groups are evenly spaced along the length direction of the grooves 8. The vertical slot groups and the horizontal slot groups are staggered with each other. The horizontal slot groups are used to place horizontal short steel bars 4, and the vertical slot groups are used to place steel cages 5.

[0035] like Figure 2 、 Figure 5 As shown, the transverse notch group includes two opposing transverse notches 9. The two transverse notches 9 in the transverse notch group at the top of the wall are respectively located on the top surface of the top plate 1 of the two module boxes on the same level. The two transverse notches 9 in the transverse notch group at the bottom of the wall are respectively located on the bottom surface of the bottom plate 2 of the two module boxes on the same level. Multiple short horizontal steel bars 4 are provided, and the multiple short horizontal steel bars 4 correspond one-to-one to the multiple transverse notch groups. When placing the short horizontal steel bars 4, the ends of the short horizontal steel bars 4 are respectively inserted into the two transverse notches 9 in the corresponding transverse notch group, thereby connecting the top plates 1 and the bottom plates 2 of the two module boxes on the same level through the short horizontal steel bars 4.

[0036] like Figure 2 、 Figure 3 、 Figure 5As shown, the vertical slot group includes two opposite vertical slots 10, the two vertical slots 10 in the vertical slot group at the top of the wall are respectively arranged at the top of the opposite plate surface of the two wall panels 3 in the wall, and the two vertical slots 10 in the vertical slot group at the bottom of the wall are respectively arranged at the bottom of the opposite plate surface of the two wall panels 3 in the wall, and the steel cage 5 includes an inverted U-shaped steel bar 51 and a straight steel bar 52. There are multiple inverted U-shaped steel bars 51 and the multiple inverted U-shaped steel bars 51 correspond one to one to the multiple groups of vertical slot groups. The middle parts of the top ends and the middle parts of the side ends of the multiple inverted U-shaped steel bars 51 are welded together by the straight steel bars 52, and the straight steel bars 52 are located on the inner side of the inverted U-shaped steel bars 51. When placing the steel cage 5 on the top of the lower wall, the two side end bottoms of the inverted U-shaped steel bars 51 in the steel cage 5 are respectively inserted into the two vertical slots 10 in the corresponding vertical slot group at the top of the lower wall, so that the two sides of the bottom of the steel cage 5 are respectively connected to the tops of the two wall panels 3 in the lower wall; when constructing the upper wall, the two side end tops of the inverted U-shaped steel bars 51 in the steel cage 5 are directly inserted into the two vertical slots 10 in the corresponding vertical slot group at the bottom of the upper wall, so that the two sides of the top of the steel cage 5 are respectively connected to the bottoms of the two wall panels 3 in the upper wall.

[0037] like Figure 5 As shown, based on the above description, when constructing a concrete modular box building node, the walls are constructed and assembled layer by layer from top to bottom, specifically including the following steps:

[0038] S. The two lower modular boxes are hoisted into place and assembled to form the lower wall. Short horizontal steel bars 4 are then placed on top of the lower wall, followed by the steel cage 5. Before placement, the steel cage 5 is prefabricated by arranging inverted U-shaped steel bars 51 according to the vertical slots 10, and then welding straight steel bars 52. This allows the cage 5 to be prefabricated. This allows the bottom ends of the two side ends of the inverted U-shaped steel bars 51 in the cage 5 to be simultaneously inserted into the vertical slots 10 of the two wall panels 3 of the lower wall during hoisting. This allows the cage 5 to be hoisted and installed in one go, significantly reducing the workload of on-site steel bar placement and positioning.

[0039] S. Cast a post-cast concrete layer 7 between the two module boxes of the wall. The module box directly serves as a casting template for the post-cast concrete layer 7, which can reduce the workload of template construction.

[0040] S. Cast a mortar layer 6 on the top surface of the top plate 1 of the two module boxes in the lower layer, and place horizontal short steel bars 4 on the surface of the mortar layer 6 corresponding to the horizontal notch group at the bottom of the upper wall.

[0041] S. Hoist the upper module box on top of the lower module box and splice them into the upper wall, so that the two ends of the horizontal short steel bars 4 on the surface of the mortar layer 6 are respectively inserted into the two horizontal slots 9 in the corresponding horizontal slot group at the bottom of the upper wall, and the two side end tops of the inverted U-shaped steel bars 51 in the steel cage 5 are respectively inserted into the two vertical slots 10 in the corresponding vertical slot group at the bottom of the upper wall, completing the alignment and connection between the upper and lower walls.

[0042] S. Complete the construction of multi-layer walls from bottom to top according to step SS.

[0043] In order to ensure the overall structural strength of the wall, the cross-sectional dimensions of the transverse notches 9 and the vertical notches 10 must meet the requirements of the wall panels 3, floor slabs and other building structures for the thickness of the steel bar protective layer. In addition, the notch length of the transverse notches 9 and the vertical notches 10 should not be less than the sum of the radius of the steel bar in the notch and the anchorage length of the tensile steel bar. The anchorage length of the tensile steel bar is determined according to the provisions of the current "Concrete Structure Design Code" on the anchorage length of the tensile steel bar. In addition, the cross-sectional area of ​​the inverted U-shaped steel bar 51 should not be less than the cross-sectional area of ​​the steel bar embedded in the module box during prefabrication, such as Figure 4 、 Figure 5 As shown, the height h of the inverted U-shaped steel bar 51 = the length of the vertical notch 10 of the upper wall + the length of the vertical notch 10 of the lower wall + the thickness of the mortar layer 6 - the radius of the inverted U-shaped steel bar 51, and the width l of the inverted U-shaped steel bar 51 = the total thickness of the wall - the thickness of the protective layer c on the left side of the wall L -Thickness of the protective layer on the right side of the wall c R - the diameter of the inverted U-shaped steel bar 51, and the wall protection layer is the concrete layer between the outer edge of the inverted U-shaped steel bar 51 and the outer side surface of the wall.

[0044] Based on the above description of the structure and construction method, the present invention can achieve rapid alignment and connection between box modules through the arrangement of horizontal slots 9, vertical slots 10, horizontal short steel bars 4, and steel cages 5, thereby reducing the difficulty of factory prefabrication and connection construction of the module box and improving the installation efficiency of the module box. Through the construction method of the concrete modular box building node of the present invention, the overall labor cost can be reduced, the construction efficiency can be improved, and the construction and technical level of the building industrialization can be improved. While effectively reducing the project cost and shortening the construction period, the project quality is guaranteed and the node is ensured to have reliable mechanical properties.

[0045] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A concrete modular box building node, comprising a modular box prefabricated from concrete, characterized in that: It also includes a floor slab and a wall body, wherein the floor slab is formed by vertically splicing the top plate (1) of the lower module box body and the bottom plate (2) of the upper module box body, and the wall body is formed by horizontally splicing the wall plates (3) of two module boxes of the same layer, and the top plates (1) and the bottom plates (2) of the two module boxes of the same layer are connected by horizontal short steel bars (4). A steel cage (5) is provided on the top of the wall body, and the bottom two sides of the steel cage (5) are respectively connected to the top of the two wall plates (3) in the lower wall body, and the top two sides of the steel cage (5) are respectively connected to the bottom of the two wall plates (3) in the upper wall body, and a mortar layer (6) is cast on the top surface of the top plate (1), and the mortar layer (6) covers the bottom of the steel cage (5) and the horizontal short steel bars (4) connected to the top plate (1), and the horizontal short steel bars (4) connected to the bottom plate (2) are located on the surface of the mortar layer (6), and a post-cast concrete layer (7) is cast between the two wall plates (3) in the wall body; The connection between the wall panel (3) and the top plate (1) and the connection between the wall panel (3) and the bottom plate (2) in the wall body are both provided with grooves (8). The top and bottom of the wall body are located at the grooves (8). Multiple groups of transverse notch groups and multiple groups of vertical notch groups are evenly spaced along the length direction of the grooves (8). The vertical notch groups and the transverse notch groups are staggered with each other. The transverse notch groups are used to place horizontal short steel bars (4), and the vertical notch groups are used to place steel cages (5). The transverse notch group includes two opposite transverse notches (9), the two transverse notches (9) in the transverse notch group at the top of the wall are respectively arranged on the top surface of the top plate (1) of the two module boxes at the same layer, and the two transverse notches (9) in the transverse notch group at the bottom of the wall are respectively arranged on the bottom surface of the bottom plate (2) of the two module boxes at the same layer, a plurality of horizontal short steel bars (4) are provided, and the plurality of horizontal short steel bars (4) correspond one to one with the plurality of transverse notch groups, and the two ends of the horizontal short steel bars (4) are respectively inserted into the two transverse notches (9) in the corresponding transverse notch group; The vertical notch group includes two opposite vertical notches (10), the two vertical notches (10) in the vertical notch group at the top of the wall are respectively arranged at the top of the two wall panels (3) in the wall, and the two vertical notches (10) in the vertical notch group at the bottom of the wall are respectively arranged at the bottom of the two wall panels (3) in the wall, the steel cage (5) includes an inverted U-shaped steel bar (52) and a straight steel bar (51), and the inverted U-shaped steel bar (52) is provided with a plurality of inverted U-shaped steel bars (52) and a plurality of groups of vertical notch groups. Correspondingly, the middle parts of the top ends and the middle parts of the side ends of the plurality of inverted U-shaped steel bars (52) are connected by straight steel bars (51), the straight steel bars (51) are located inside the inverted U-shaped steel bars (52), the bottom parts of the two side ends of the inverted U-shaped steel bars (52) in the steel cage (5) are respectively inserted into the two vertical notches (10) in the corresponding vertical notch group at the top of the lower wall, and the top parts of the two side ends of the inverted U-shaped steel bars (52) in the steel cage (5) are respectively inserted into the two vertical notches (10) in the corresponding vertical notch group at the bottom of the upper wall.

2. The concrete modular box building node according to claim 1, characterized in that: Transverse connecting steel bars (11) are pre-embedded on the two wall panels (3) in the wall.

3. A construction method for a concrete modular box building node according to any one of claims 1 to 2, characterized in that: The following steps are involved: S1. Hoist the two lower module boxes into place and assemble them into the lower wall. Then, first place the horizontal short steel bars (4) on the top of the lower wall, and then place the steel cage (5) on the top of the lower wall. S2, pouring a post-cast concrete layer (7) between the two wall panels (3) of the lower wall; S3, pouring a mortar layer (6) on the top surface of the top plate (1) of the two module boxes in the lower layer, and placing horizontal short steel bars (4) corresponding to the transverse notch group at the bottom of the upper wall on the surface of the mortar layer (6); S4, hoisting the upper module box on top of the lower module box and splicing them into the upper wall, so that the two ends of the horizontal short steel bars (4) on the surface of the mortar layer (6) are respectively inserted into the two horizontal notches (9) in the corresponding horizontal notch group at the bottom of the upper wall, and the two side ends of the inverted U-shaped steel bars (52) in the steel cage (5) are respectively inserted into the two vertical notches (10) in the corresponding vertical notch group at the bottom of the upper wall; S5. Complete the construction of the multi-layer wall in sequence from bottom to top according to steps S1-S4.

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