Modular steel structure stacking box stand connecting structure and installation construction method thereof

Abstract

This invention belongs to the field of steel structure building technology. A modular stacked box girder column connection structure includes: foundation node embedded parts, pre-embedded in the beam-column joints of the stacked box girder concrete foundation; first-floor corner fitting connection components, set on the foundation node embedded parts; intermediate-floor corner fitting connection components, set on the grouting holes of the column connection nodes between the first-floor and intermediate-floor box girders, with the connecting rod of the intermediate-floor corner fitting connection components inserted into the bottom cavity of the column corresponding to the intermediate-floor box connection node; and top-floor corner fitting connection components, set on the grouting holes of the column connection nodes of the top-floor box girders, with grout poured into the columns of the roof layer structural connection nodes. This invention also discloses an installation and construction method for modular stacked box girder structures. This invention solves the technical problem of existing multi-story modular houses having no connection to the ground and unreliable connections between upper and lower unit modules.

Description

Technical Field

[0001] This invention belongs to the field of steel structure building technology, specifically relating to a modular stacked box girder column connection structure and an installation and construction method for modular stacked box girder structures. Background Technology

[0002] Lightweight modular steel container houses are constructed by assembling several prefabricated steel container modules at the factory, transporting them to the construction site, and then connecting them like building blocks to form a complete stacked container structure. The interior and exterior cladding, decoration, and installation of water, electricity, and other functional facilities are then carried out. Container modular buildings are stable and robust, with excellent sealing performance, waterproofing, fireproofing, and corrosion resistance, as well as strong earthquake and deformation resistance. They are mainly suitable for low-rise or multi-story residential buildings, hotels, office buildings, and villas. Because the main container modules and components are centrally manufactured in the factory, they can be directly hoisted and installed on site, resulting in rapid and efficient construction, fully meeting the requirements of high integration, rapid construction, and quick commissioning.

[0003] Chinese Patent 201710015101.X discloses a box-type integrated frame house, with connecting pieces on the sides of the corner columns, connecting the corresponding connecting pieces of two adjacent standard single houses using auxiliary support steel beams. Chinese Patent 202011535498.3 discloses a construction method for modular houses, where the internal cavities of the walls are constructed using cast-in-place foam concrete. Chinese Patent 201620506162.7 discloses a modular box corner connector, which is fixedly connected to the top and bottom components of the boxes located between them. Chinese Patent 201920900725.4 discloses a connection node for modular buildings, with an upper module column and a lower module column respectively set on both sides of the connecting steel plate, one leg of the upper angle steel welded to the upper module column, and the other leg in contact with the connecting steel plate. Chinese Patent 202110931453.6 discloses a construction method for a recycled concrete modular integrated house, connecting the corner columns and frame beams to the walls using monolithically cast recycled concrete. Zhang Shibing of Shandong Jianzhu University developed a prefabricated integrated housing system for integrated housing, which adopts a prefabricated integral composite floor slab form. Composite slabs are installed on steel modules, and composite layers are poured. Chinese Patent 201921061915.8 discloses a modular unit frame column-column connection node and its housing construction system, including two frame side columns, a connecting steel plate frame for horizontal connection of the frame side columns, and embedded parts for longitudinal connection of the frame side columns. Several grouting holes are opened on the frame side columns.

[0004] Chinese Patent 201910331049.8 discloses a multi-layer modular house support column connection structure and method. The structure includes vertically arranged hollow steel columns and reinforcing bars within the hollow steel columns in a common adjacent area. Non-shrink concrete is injected into the hollow steel columns. The first-layer box (bottom box) is placed directly on the ground, with no connection between the first-layer box and the ground, resulting in poor connection reliability between the first-layer box and the concrete foundation structure. Furthermore, the reinforcing bars extend upwards from the ground and are fixed with double-threaded connectors. The upper reinforcing bars need to extend from the top of the unit module into the steel column and be fixed with the double-threaded connectors. With this structure, connecting the upper reinforcing bars to the double-threaded connectors is very inconvenient. Additionally, the reinforcing bars can move freely within the steel columns. During grouting, the falling grout causes the reinforcing bars to move back and forth within the steel column, making it impossible for them to maintain an upright position. This significantly reduces the tensile strength of the reinforcing bars, leading to unreliable connections between upper and lower unit modules. Summary of the Invention

[0005] The first objective of this invention is to provide a modular steel stacked box column connection structure to solve the technical problem that existing multi-story modular houses have no connection to the ground and the connection between upper and lower unit modules is unreliable.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a modular steel stacked box girder column connection structure, comprising: The basic node embedded parts are embedded in the beam-column joints of the stacked box concrete foundation. The first-layer corner fitting connection assembly is set on the pre-embedded part of the foundation node. The first-layer corner fitting connection assembly is inserted into the bottom cavity of the column of the corresponding first-layer box connection node. High-strength non-shrink grout is poured into the column of the first-layer box connection node to realize the connection between the concrete foundation beam-column node and the first-layer box column connection node. The intermediate layer corner fitting connection assembly is set on the grouting hole of the column connection node between the first layer box and the intermediate layer box. The intermediate layer corner fitting connection assembly is inserted into the bottom cavity of the column corresponding to the intermediate layer box connection node. High-strength non-shrink grout is poured into the column of the intermediate layer box connection node to realize the connection between the intermediate layer box column connection nodes. The top corner fitting connection assembly is installed on the grouting hole of the connection node of the top box column. The top corner fitting connection assembly is inserted into the bottom cavity of the column of the connection node of the roof structure. High-strength non-shrink grout is poured into the column of the connection node of the roof structure to realize the connection between the top box and the connection node of the roof structure.

[0007] The present invention features a stacked box girder structure with embedded foundation nodes on the top surface of the concrete foundation. Bottom-level corner connectors are welded to the embedded steel plates of these embedded nodes. The first-level box girder is hoisted and connected to the concrete foundation via these corner connectors, significantly improving the reliability of the connection between the concrete foundation and the first-level box girder. Furthermore, the stacked box girder structure of this invention utilizes corner connectors between intermediate-level box girder units and between the top-level box girder and the roof structural columns for node connections, further enhancing the reliability of the connections between intermediate-level box girder units and between the top-level box girder and the roof structural columns.

[0008] To address the technical problem of how to implement the pre-embedded parts for basic nodes, the present invention adopts the following technical solution: the pre-embedded parts for basic nodes include a pre-embedded plate, the bottom of which is uniformly distributed with vertical ribs, and the ends of the vertical ribs are provided with parallel ribs.

[0009] To address the technical problem of how to implement the first-layer corner fitting connection assembly, the present invention adopts the following technical solution: the first-layer corner fitting connection assembly includes a first connecting plate; a first connecting rod is disposed on the top of the first connecting plate; the first connecting rod is disposed perpendicularly to the first connecting plate; a first flange corner plate is symmetrically disposed at the root of the first connecting rod, and the first flange corner plate is connected to the first connecting plate.

[0010] To address the technical problem of how to implement the intermediate corner connector assembly, the present invention adopts the following technical solution: the intermediate corner connector assembly includes a second connecting plate; A second connecting rod is provided at the top of the second connecting plate; the second connecting rod is perpendicular to the second connecting plate; a second flange corner plate is symmetrically provided at the root of the second connecting rod, and the second flange corner plate is connected to the second connecting plate; a second connecting rod is provided at the bottom of the second connecting plate, and the second connecting rod is perpendicular to the second connecting plate; a second flange corner plate is symmetrically provided at the root of the second connecting rod, and the second flange corner plate is connected to the second connecting plate.

[0011] To address the technical challenge of connecting the top-level corner brackets, this invention employs the following technical solution: the top-level corner bracket connecting assembly includes a third connecting plate, with a third connecting rod 1 disposed at its top; the third connecting rod 1 is perpendicular to the third connecting plate; a third flange corner plate 1 is symmetrically disposed at the base of the third connecting rod 1 and connected to the third connecting plate; a third connecting rod 2 is disposed at the bottom of the third connecting plate, perpendicular to the third connecting plate; a third flange corner plate 2 is symmetrically disposed at the base of the third connecting rod 2 and connected to the third connecting plate.

[0012] The second objective of this invention is to provide an installation method for modular steel stacked boxes, which is achieved using the steel modular stacked box column connection structure described in any of the above-mentioned claims.

[0013] To address the technical problem of how to implement the installation and construction method of modular steel caissons, this invention adopts the following technical solution: the installation and construction method of modular steel caissons includes: After the steel reinforcement of the concrete foundation beams and columns of the steel structure box-type modular housing stacked box system is tied, foundation node embedded parts are set at the reinforced concrete foundation beam and column joints of the stacked box structure; the concrete foundation beams and columns of the stacked box structure are poured; after the concrete reaches the demolding strength, the concrete foundation beam and column formwork is removed, and the first-floor corner member connection component is set on the foundation node embedded parts to make the two form a whole. After the concrete foundation strength of the stacked boxes reaches the design requirements, the first-layer box is hoisted and installed, so that the upper connecting rod of the first-layer corner fitting connecting assembly is inserted into the cavity at the bottom of the corresponding first-layer box connecting node column; grouting is performed using the grouting holes reserved at the top column of the first-layer box; before the grouting material initially sets, the middle-layer corner fitting connecting assembly is installed in the grouting holes at the top of the first-layer box. The intermediate layer box is hoisted and installed, and the upper connecting rod of the intermediate layer corner fitting connecting assembly is inserted into the cavity at the bottom of the corresponding intermediate layer box connecting node column; grouting is performed using the grouting hole reserved at the top column of the intermediate layer box; before the grouting material initially sets, the intermediate layer corner fitting connecting assembly is installed through the grouting hole at the top of the intermediate layer box. Install the construction layer by layer up to the top box, so that the upper connecting rod of the middle corner fitting connecting component of the middle box is inserted into the cavity at the bottom of the column of the top box connection node; use the grouting hole reserved at the top column of the top box to grout; before the grouting material initially sets, install the top corner fitting connecting component at the grouting hole at the top of the top box. Hoist the roof structure, aligning the upper connecting rod of the top corner fitting assembly with the cavity at the bottom of the roof structure connection node column; grout using the pre-drilled grouting holes at the top connection node column of the roof structure; install the roof structure.

[0014] To solve the technical problem of unreliable connection between the intermediate corner fitting connecting assembly and the first-layer box body, the present invention adopts the following technical solution: the lower part of the intermediate corner fitting connecting assembly is inserted into the grouting hole at the top of the column of the first-layer box body connection node, and the intermediate corner fitting connecting assembly is fixedly connected to the top contact surface of the first-layer box body.

[0015] To address the technical problem of unreliable connection between the top corner fitting connector and the top box, the lower connecting rod of the top corner fitting connector is inserted into the grouting hole at the top of the column of the top box connection node, and the top corner fitting connector is fixedly connected to the top contact surface of the top box.

[0016] To address the technical challenges of ensuring the safety of modular box units during hoisting, this invention employs the following technical solution: the stacked box structure is hoisted using a lifting device, which is connected to the hook of the hoisting mechanism via slings. During hoisting, the modular box unit is in a vertically hoisted state, ensuring that the position of the hook of the hoisting mechanism, the lifting device, and the center of gravity of the modular box unit coincide in the vertical direction.

[0017] To solve the technical problems of incomplete grouting and settling, the present invention adopts the following technical solution: the grouting material is C40 high-strength non-shrink grouting material; during the grouting process, the side wall of the column is continuously tapped to make the grouting material compact until the entire column is filled. Grouting is stopped after the grouting material no longer produces air bubbles or sets. After stopping grouting, observe for 30 minutes. If the grouting material is found to have settling, a second grouting is performed. Attached Figure Description

[0018] Figure 1 This is a three-dimensional schematic diagram of the steel structure stacked box module unit of the present invention; Figure 2 This is an elevation view of a modular house constructed using stacked boxes, as described in the embodiment. Figure 3-1 This is a schematic diagram of the first pre-embedded component of the basic node of the present invention; Figure 3-2 This is a top view of the first pre-embedded component of the basic node of the present invention; Figure 3-3 This is a schematic diagram of the second pre-embedded component of the basic node of the present invention; Figure 3-4 This is a top view of the second pre-embedded component of the basic node of the present invention; Figure 3-5 This is a schematic diagram of the third pre-embedded component of the basic node of the present invention; Figure 3-6 This is a top view of the third pre-embedded component of the basic node of the present invention; Figure 4-1 This is a schematic diagram of the first-layer corner connector assembly of the present invention; Figure 4-2 This is a top view of the first-layer corner connector assembly of the present invention; Figure 4-3 This is a schematic diagram of the second corner connector assembly of the first layer of the present invention; Figure 4-4 This is a top view of the second corner connector assembly of the first layer of the present invention; Figure 4-5 This is a top view of the first-layer corner connector assembly three of the present invention; Figure 4-6 This is a connection status diagram of the pre-embedded parts of the first-layer corner fitting connection assembly of the present invention; Figure 5-1 This is a schematic diagram of the intermediate layer corner connector assembly of the present invention; Figure 5-2This is a top view of the intermediate layer corner connector assembly of the present invention; Figure 5-3 This is a schematic diagram of the second intermediate layer corner connector assembly of the present invention; Figure 5-4 This is a top view of the second intermediate layer corner connector assembly of the present invention; Figure 5-5 This is a top view of the third intermediate corner connector assembly of the present invention; Figure 6-1 This is a schematic diagram of the top interlayer corner connector assembly of the present invention; Figure 6-2 This is a top view of the first interlayer corner connector assembly of the present invention; Figure 6-3 This is a schematic diagram of the second corner connector assembly of the top layer of the present invention; Figure 6-4 This is a top view of the second interlayer corner connector assembly of the present invention; Figure 6-5 This is a schematic diagram of the top interlayer corner connector assembly three of the present invention; Figure 6-6 This is a top view of the third interlayer corner connector assembly of the present invention; Figure 6-7 This is a schematic diagram of the fourth corner connector assembly of the top layer of the present invention; Figure 6-8 This is a top view of the fourth corner connector assembly of the top layer of the present invention; Figure 7 This is a hoisting diagram of the present invention; Figure 8-1 This is a detailed structural drawing of the connection between the foundation node of the bottom box after grouting (connection node between the corner piece and the foundation of the first floor side span). Figure 8-2 This is a top view of the connection structure of the foundation node of the bottom box after grouting; Figure 8-3 This is a detailed structural drawing of the second connection of the foundation node of the bottom box after grouting (connection node between the middle span corner piece and the foundation of the first floor). Figure 8-4 This is a top view of the connection structure of the second node of the bottom box foundation after grouting; Figure 9-1 This is a detailed drawing of the connection node of the steel corner column in the middle layer of the box module after grouting (intermediate layer side span module and module node). Figure 9-2 This is a detailed drawing of the steel corner column connecting the intermediate layer of the box module after grouting (intermediate layer, intermediate span module and module node). Figure 10-1 This is a detailed structural drawing of the connection between the roof steel column and the box body corner column after the roof steel column grouting is completed (corner member and corner member node of the top floor side span). Figure 10-2This is a detailed structural drawing of the connection between the roof steel column and the box body corner column after the roof steel column grouting is completed (top floor middle span corner piece and corner piece node); Figure label: 100 Box-type module unit; 111 Bottom main beam, 112 Bottom secondary beam, 120 Column, 131 Top main beam, 132 Top secondary beam, 133 Plinth; 200 Concrete foundation beams and columns; 300 Foundation node embedded parts; 301 Embedded plate, 302 Vertical anchor bar, 303 Parallel reinforcement; 400 First-floor corner fitting connection assembly; 401 First connecting plate, 402 First connecting rod, 403 First flange corner plate; 500 Intermediate-floor corner fitting connection assembly; 501 Second connecting plate, 511 Second connecting rod one, 512 Second flange corner plate one; 521 Second connecting rod two, 522 Second flange corner plate two; 600 Top-floor corner fitting connection assembly; 601 Third connecting plate, 611 Third connecting rod one, 612 Third flange corner plate one; 621 Third connecting rod two, 622 Third flange corner plate two; 700 Lifting mechanism; 710 Lifting tool, 720 Lifting mechanism, 730 Lifting sling; 800 Roof structure. Detailed Implementation

[0019] Example 1 In existing modular steel structure houses, the first-floor unit (bottom unit) is placed directly on the ground without any connection between it and the ground, resulting in poor reliability of the connection between the first-floor unit and the concrete foundation structure. Furthermore, the reinforcing bars extend upwards from the ground and are fixed to double-threaded connectors, while the upper reinforcing bars need to extend from the top of the unit module into the steel column and be fixed to the double-threaded connectors. With this structure, connecting the upper reinforcing bars to the double-threaded connectors is very inconvenient. Additionally, the reinforcing bars can move freely within the steel column; during grouting, the falling grout causes the reinforcing bars to move back and forth within the column, making it impossible for them to maintain an upright position. This significantly reduces the tensile strength of the reinforcing bars, leading to unreliable connections between upper and lower unit modules.

[0020] Stacked box gabion structures have multiple layers, requiring high safety performance between the concrete foundation and the bottom box. However, existing low-rise modular steel structure houses are either placed directly on the ground or simply connected to the ground, which cannot meet the stability and safety requirements of the connection between the first-floor box and the ground for high-rise stacked box gabions. Therefore, this embodiment provides a steel structure modular stacked box gabion column connection structure.

[0021] like Figure 1 As shown, the box-type module unit is a rectangular structure, including a top frame and a bottom frame. The bottom frame includes a bottom main beam 111 and a bottom secondary beam 112. The top frame includes a top main beam 131, a top secondary beam 132, and purlins 133. Several columns 120 are installed between the top frame and the bottom frame.

[0022] The modular stacked box girder column connection structure of the steel structure includes a foundation node embedded part 300, a first-floor corner member connection component 400, a middle-floor corner member connection component 500, and a top-floor corner member connection component 600.

[0023] The foundation node embedded part is 300mm, and it is embedded in the 200mm node of the stacked box girder concrete foundation beam-column joint. Specifically, as follows... Figure 3-1 , 3-2 As shown, the foundation node embedded part 300 includes an embedded plate 301, which is preferably a steel plate. Vertical anchor bars 302 are evenly distributed at the bottom of the embedded plate 301, and the anchor bars are connected by through-hole plug welding or submerged arc pressure welding. The length of the vertical anchor bars 302 is preferably 500 mm. The spacing between the vertical anchor bars 302 is preferably 96 mm. A parallel bar 303 is welded to the end of each vertical anchor bar 302. The vertical bars 302 and the parallel bar 303 are steel bars. The length of the parallel bar is 5 times its diameter.

[0024] In one embodiment, such as Figure 3-3 , 3-4 As shown in 3-5 and 3-6, the bottom of the embedded plate 301 is provided with 3 or 5 rows of vertical anchor bars, or 3 columns of vertical anchor bars, with 3 or 5 vertical anchor bars in each row.

[0025] The first-layer corner fitting connection component is welded onto the pre-embedded part of the foundation node. The first-layer corner fitting connection component is inserted into the bottom cavity of the column of the corresponding first-layer box connection node. Concrete is poured into the column of the first-layer box connection node to realize the connection between the concrete foundation beam-column node and the first-layer box connection node.

[0026] Specifically, such as Figure 4-1 , 4-2 As shown, the first-layer corner fitting connection assembly 400 includes a first connecting plate 401; the first connecting plate 401 is preferably a steel plate. A first connecting rod 402 is welded to the top of the first connecting plate 401, preferably by through-hole plug welding. The first connecting rod is arranged perpendicularly to the first connecting plate. A first flange corner plate 403 is symmetrically arranged at the root of the first connecting rod, and the first flange corner plate is connected to the first connecting plate.

[0027] like Figure 4-3 , 4-4 As shown in Figures 4-5 and 4-6, in one embodiment, the number of first connecting rods 401 is one, two, or four. The first connecting rod 402 is preferably a steel rod, with a preferred diameter of 50 mm and a length of 1500 mm. The distance between the steel rods is preferably 220 mm or 200 mm.

[0028] The intermediate layer corner fitting connection component 500 is welded to the grouting hole of the connection node between the first layer box and the intermediate layer box. The intermediate layer corner fitting connection component is inserted into the bottom cavity of the column of the corresponding intermediate layer box connection node. Concrete is poured into the column of the intermediate layer box connection node to realize the connection between the intermediate layer box connection nodes.

[0029] Specifically, such as Figure 5-1 , Figure 5-2 , 5-3 As shown in Figures 5-4 and 5-5, the intermediate layer corner connector assembly 500 includes a second connecting plate 501, a first second connecting rod 511, and a second second connecting rod 521. The second connecting plate 501 is preferably a steel plate.

[0030] A second connecting rod is disposed at the top of the second connecting plate; the second connecting rod is perpendicular to the second connecting plate; a second flange corner plate 512 is symmetrically disposed at the root of the second connecting rod, and the second flange corner plate is connected to the second connecting plate. In one embodiment, the number of second connecting rods is 1, 2, or 4. The second connecting rod 511 is preferably a steel rod with a height of 1000 mm, a diameter of 40 mm, and a preferred distance of 220 mm between the steel rods.

[0031] A second connecting rod 2 is provided at the bottom of the second connecting plate, and the second connecting rod 2 is perpendicular to the second connecting plate; a second flange corner plate 2 522 is symmetrically provided at the root of the second connecting rod 2, and the second flange corner plate 2 is connected to the second connecting plate. In one embodiment, the number of second connecting rods 2 is 1, 2 or 4. The second connecting rod 2 521 is preferably a steel rod, the steel rod is 1000mm high, the steel rod is 40-42mm in diameter, and the distance between the steel rods is preferably 220mm.

[0032] The top corner fitting connection component 600 is welded to the grouting hole of the column connection node of the top box body. The top corner fitting connection component is inserted into the bottom cavity of the column of the connection node of the roof layer structure. Concrete is poured into the column of the connection node of the roof layer structure to realize the connection between the top box body and the roof layer structure 800 connection node.

[0033] Specifically, such as Figures 6-1 to 6-8 As shown, the top corner fitting connection assembly 600 includes a third connecting plate 601, a first third connecting rod 611, and a second third connecting rod 621. The third connecting plate 601 is preferably a steel plate.

[0034] A third connecting rod is disposed at the top of the third connecting plate; the third connecting rod is perpendicular to the third connecting plate; a third flange corner plate 612 is symmetrically disposed at the root of the third connecting rod, and the third flange corner plate is connected to the third connecting plate. In one embodiment, the number of third connecting rods is one. The third connecting rod 611 is preferably a steel rod with a height of 1000 mm, a diameter of 40-42 mm, and a preferred distance of 220 mm between the steel rods.

[0035] A third connecting rod 2 is provided at the bottom of the third connecting plate, and the third connecting rod 2 is perpendicular to the third connecting plate; a third flange corner plate 2 622 is symmetrically provided at the root of the third connecting rod 2, and the third flange corner plate 2 is connected to the third connecting plate. In one embodiment, the number of third connecting rods 2 is one or two. The third connecting rod 2 621 is preferably a steel rod, with a height of 1000mm, a diameter of 40-42mm, and a preferred distance of 220mm between the steel rods.

[0036] Example 2 The installation and construction method of modular stacked box girder steel structure is as follows: Factory processing and production of stacked box girder module units and components → Positioning and installation of embedded parts in the foundation of the stacked box girder structure → Pouring concrete foundation beams and columns of the stacked box girder structure → Welding of the first-floor corner fitting connection components to the foundation embedded steel plates → Hoisting and installation of the first-floor box girder → Grouting of the cavities of the steel corner columns at the connection nodes of the first-floor box girder → Installation and welding of the intermediate-floor corner fitting connection components → Hoisting and installation of the second-floor box girder → Grouting of the cavities of the steel corner columns at the connection nodes of the second-floor box girder → Installation and construction sequentially up to the top-floor box girder → Grouting of the cavities of the steel corner columns at the connection nodes of the top-floor box girder → Installation and welding of the top-floor corner fitting connection components → Hoisting of the roof steel structure columns → Grouting of the cavities of the roof steel structure columns → Installation and construction of the conventional steel structure roof layer, specifically: After the steel reinforcement of the concrete foundation beams and columns of the steel structure box-type modular housing stacked box system is tied, foundation node embedded parts are set at the reinforced concrete foundation beam and column joints of the stacked box structure; after the embedded parts are installed, the concrete foundation beams and columns of the stacked box structure are poured. After the foundation concrete reaches the design strength, remove the formwork of the concrete foundation beams and columns, locate the position of the embedded steel plate on the top surface of the foundation, and weld the first-floor corner fitting connection assembly on the embedded steel plate of the foundation node to make the two form a whole. Hoist and install the first-layer box body, insert the upper connecting rod of the first-layer corner fitting connecting assembly into the cavity at the bottom of the corresponding first-layer box body connecting node column; use the grouting hole reserved at the top column of the first-layer box body to grout; before the grout material initially sets, install the intermediate-layer corner fitting connecting assembly in the grouting hole at the top of the first-layer box body. Hoist and install the intermediate layer box, inserting the upper connecting rod of the intermediate layer corner fitting connecting assembly into the cavity at the bottom of the corresponding intermediate layer box connecting node column; grout using the grouting hole reserved at the top column of the intermediate layer box; before the grouting material initially sets, install the intermediate layer corner fitting connecting assembly through the grouting hole at the top of the intermediate layer box. Install the construction layer by layer up to the top box, so that the upper connecting rod of the middle corner fitting connecting component of the middle box is inserted into the cavity at the bottom of the column of the top box connection node; use the grouting hole reserved at the top column of the top box to grout; before the grouting material initially sets, weld the top corner fitting connecting component at the grouting hole at the top of the top box. Hoist the roof structure, aligning the upper connecting rod of the top corner fitting assembly with the cavity at the bottom of the roof structure connection node column; grout using the pre-drilled grouting holes at the top connection node column of the roof structure; install the roof structure.

[0037] In one embodiment, the lower part of the intermediate corner fitting connecting assembly is inserted into the grouting hole at the top of the first-layer box connection node column, and the intermediate corner fitting connecting assembly is welded and fixed to the top contact surface of the first-layer box.

[0038] In one embodiment, the lower connecting rod of the top corner fitting connecting assembly is inserted into the grouting hole at the top of the column of the lower box connecting node, and the top corner fitting connecting assembly is welded and fixed to the top contact surface of the top box.

[0039] In one embodiment, the stacked box structure is hoisted using a lifting device. The lifting device is connected to the hook of the hoisting mechanism via slings. During the hoisting process, the modular box unit is in a vertical hoisting state, ensuring that the position of the hook of the hoisting mechanism, the lifting device, and the center of gravity of the modular box unit coincide in the vertical direction.

[0040] In one embodiment, the grout is C40 high-strength non-shrink grout.

[0041] In one embodiment, the column sidewall is continuously tapped during the grouting process to compact the grout until the entire column is filled. Grouting is stopped once the grout stops bubbling and settling. After stopping grouting, observe for 30 minutes. If settling of the grout is found, a second grouting is performed.

[0042] The installation and construction methods for modular stacked steel caissons are as follows: 1. Modular unit and component processing and production: The steel structure space module units, components, and corner connection assemblies in this stacked box structure are mass-produced by a specific manufacturer in accordance with the design drawings, on-site production needs, and project schedule.

[0043] 2. Installation of embedded parts for foundation nodes of stacked box girder structure: After the reinforcement of the concrete foundation beams and columns of the modular box-type steel structure building is completed, the foundation connection node embedded parts are installed according to the axial positioning positions of the embedded parts of the box-type foundation nodes in the design drawings. The embedded parts are set on the top surface of the reinforced concrete foundation beam-column nodes. The embedded parts are 20mm thick rectangular steel plates with 500mm long, 120mm spacing, and 20mm diameter vertical grade III threaded steel bars welded to them. The welding of the steel bars to the steel plate is through-hole plug welding. The ends of the vertical steel bars are equipped with 5d parallel bars to improve the tensile strength of the embedded parts. The outermost vertical steel bars are 40mm apart from the edge of the steel plate.

[0044] The installation of embedded parts must ensure accurate axis positioning and elevation. During installation, first mark the positioning axis on the steel plate. Adjust the axis position and elevation of the embedded parts according to the positioning axis of the concrete foundation beam and column formwork. After verifying the accurate positioning of the dimensions and elevation, use reinforcing ribs to spot weld the embedded parts to the reinforcing bars of the concrete foundation beam and column for fixation. The installation of the embedded parts is then complete.

[0045] 3. Casting concrete foundation beams and columns for stacked box girder structure: After the embedded parts are installed, cast concrete foundation beams and columns for the steel structure stacked box girder system. After the concrete strength reaches the design requirements, remove the formwork for the concrete foundation beams and columns, locate the position of the embedded steel plate on the top surface of the foundation, and clean, remove dirt and rust from the surface of the embedded steel plate.

[0046] 4. Welding of the first-layer corner fitting connecting assembly to the embedded steel plate: The embedded steel plate is fully welded to the bottom steel plate of the first-layer corner fitting connecting assembly using a bevel weld, forming a whole with the embedded steel plate. The first-layer corner fitting connecting assembly is constructed from a 1500mm long, 50mm diameter vertical steel bar and a root flange corner plate welded to a 20mm thick rectangular steel plate using through-hole plug welding according to the connection requirements.

[0047] Before welding and installing the steel plate of the first-layer corner fitting connecting assembly to the embedded steel plate, positioning and leveling are required. The first-layer corner fitting connecting assembly should be positioned according to the dimensions in the drawings, with a horizontal height deviation of ≤3mm, an installation dimension deviation of ≤3mm, and a diagonal deviation of ≤6mm for the four corners of a single module. After dimensional verification, the steel plate of the first-layer corner fitting connecting assembly is welded to the embedded steel plate to form a unified whole.

[0048] 5. Hoisting and installation of the first-floor enclosure: After the corner fittings and foundation embedded parts of the first floor are welded together, and the concrete foundation strength of the steel structure modular house reaches 100% of the design requirements, the hoisting and installation of the first floor units of the steel structure modular house can begin. Figure 7As shown, the stacked box girder structure is lifted using specialized lifting tools and slings 730 to ensure vertical lifting during the process, and to ensure that the main hook of the lifting mechanism 720, the lifting tool 710, and the center of gravity of the module unit 100 coincide in the vertical direction. The lifting machinery is selected according to the lifting plan. The initial crane positioning location requires road surface compaction, with a surface soil bearing capacity of not less than 130 kPa. The crane support points need to be leveled and compacted. Four 1.5m x 1.5m x 100mm roadbed boxes are laid at the crane positioning location.

[0049] During the hoisting and positioning process, the steel bars of the first-floor corner fitting connecting components are slowly aligned and inserted into the cavity at the bottom of the steel corner column of the steel structure box module connecting node. During the lowering of the box, a dedicated person synchronously controls and adjusts the plane position of the box to ensure that the plane position axis is accurate after the box is lowered into place.

[0050] 6. Grouting inside the cavity of the steel corner column at the connection node of the first-floor box: After the first-floor box hull is installed in place, C40 high-strength, non-shrink grout is used to fill the cavities of the steel corner columns at the box hull connection nodes. There are pre-drilled grouting holes at the top of the steel corner columns. Grouting is performed from the top of the corner columns downwards, continuously tapping the steel walls of the corner columns during the grouting process to ensure the grout is compacted until the entire steel corner column is filled. Grouting is stopped once no more air bubbles or settling occur. After stopping grouting, observe for 30 minutes. If settling is observed, a second grouting is performed. The connection structure of the first node of the bottom box hull foundation after grouting is shown in the image. Figure 8-3 , 8-4 .

[0051] Install and weld the intermediate layer corner connector assembly: After the grouting of the steel corner columns connecting the first-layer box module is completed, before the grout has initially set, the intermediate-layer corner fitting connection components are installed and welded through the grouting holes on the top of the first-layer box. The intermediate-layer corner fitting connection components are made of 20mm thick rectangular steel plates welded on both sides with vertical steel bars of 1000mm length and 40mm diameter and root flange corner plates.

[0052] The key points for installing and welding the intermediate layer corner fitting connecting components are as follows: While inserting the steel rod of the intermediate layer corner fitting connecting component into the grouting hole at the top of the steel corner column of the first-layer box connection node, adjust the planar position and elevation of the intermediate layer corner fitting connecting component to ensure accurate positioning. After installation, the horizontal height deviation should be ≤3mm, the installation dimension deviation ≤3mm, and the diagonal deviation of the four corners of the intermediate layer corner fitting connecting component for a single module should be ≤6mm. Finally, spot weld the rectangular steel plate of the intermediate layer corner fitting connecting component to the top contact surface of the box module. See the section showing the grouting process after filling the cavity of the steel corner column of the intermediate layer connection node of the box module. Figure 9-1 , 9-2 .

[0053] 7. Hoisting and installation of the second-floor box: Complete the hoisting and installation of the second-floor steel structure box module according to the construction steps and control points in step 5.

[0054] 8. Grouting inside the cavity of the steel corner column at the connection node of the second-layer box: Complete the grouting construction of the steel corner column cavity at the connection node of the second-layer box according to the construction process and operation points in step 6. Install the steel structure box module sequentially according to the above-mentioned process flow for installation, up to the hoisting and installation of the top-layer box.

[0055] Grouting of the steel corner column cavities at the top-level box-type connection nodes: After the top-level box-type structure is hoisted, grouting is performed on the steel corner column cavities at the connection nodes. Grouting is completed according to the construction process and key points in step 6.

[0056] Installation and welding of the top-level corner fitting connection assembly: After the grouting of the steel corner column cavity at the top-level box connection node is completed, before the grout initially sets, install and weld the top-level corner fitting connection assembly according to the construction process and key points in step 6. The structure of the top-level corner fitting connection assembly is the same as that of the intermediate-level corner fitting connection assembly, see [link to relevant documentation]. Figures 6-1 to 6-8 ; Hoisting the roof steel structure columns: The roof layer is a conventional steel structure beam and column system. The installation of the roof steel structure can be carried out normally according to the steel structure installation plan. The key points for the connection and installation control of the roof steel structure columns and the top corner fittings of the box body are: according to the roof steel column plan positioning diagram, the accurate placement of the steel column must be controlled during hoisting, so that the top corner fittings are inserted into the bottom cavity of the roof steel column. While the steel column is being lowered, the placement point and verticality of the steel column are adjusted to ensure that the roof steel column is accurately positioned after being lowered. After the roof steel column is lowered, the base of the steel column is fully welded to the steel plate of the top corner fittings of the box body. Grouting inside the cavity of the roof steel structure column: After the roof steel structure column is installed, grouting material is injected through the grouting hole at the top of the roof steel column. The grouting construction inside the cavity of the roof steel column is completed in accordance with the construction process and operation points in step 6. After the roof steel columns are grouted, the connection structure of the corner column (top floor side span) between the roof steel columns and the box girder is shown in the figure. Figure 10-1 After the roof steel columns are grouted, the connection structure of the corner column (top floor middle span) connecting the roof steel columns and the box structure is shown in the figure. Figure 10-2 Elevation drawing of the modular house (see below) Figure 2 .

[0057] This invention is not limited to the above embodiments. Based on the technical solutions disclosed in this invention, those skilled in the art can make some substitutions and modifications to some of the technical features without creative effort, and all such substitutions and modifications are within the protection scope of this invention.

Claims

1. An installation and construction method for modular stacked steel structures, characterized by: The installation and construction method includes: factory processing and production of stacked box girder module units and components → positioning and installation of embedded parts for the stacked box girder structure foundation → pouring concrete foundation beams and columns for the stacked box girder structure → welding of the first-floor corner fitting connection components to the foundation embedded steel plates → hoisting and installation of the first-floor box girder → grouting of the cavities of the steel corner columns at the connection nodes of the first-floor box girder → installation and welding of the intermediate-floor corner fitting connection components → hoisting and installation of the second-floor box girder → grouting of the cavities of the steel corner columns at the connection nodes of the second-floor box girder → sequential installation up to the top-floor box girder → grouting of the cavities of the steel corner columns at the connection nodes of the top-floor box girder → installation and welding of the top-floor corner fitting connection components → hoisting of the roof steel structure columns → grouting of the cavities of the roof steel structure columns → installation and construction of the conventional steel structure roof layer, specifically: After the reinforcement of the concrete foundation beams and columns of the steel-structured modular box-type house is tied, foundation node embedded parts are set at the reinforced concrete foundation beam-column joints of the box-type structure. These embedded parts are pre-embedded in the concrete foundation beam-column joints of the box-type structure. The concrete foundation beams and columns of the box-type structure are then poured. After the concrete reaches the demolding strength, the formwork for the concrete foundation beams and columns is removed. First-floor corner bracket connecting components are then installed on the foundation node embedded parts to form a whole. The first-floor corner bracket connecting components are installed on the foundation node embedded parts, and the connecting rods of the first-floor corner bracket connecting components are inserted into the bottom cavity of the steel corner column of the corresponding first-floor box-type connection node. Grouting material is poured into the steel corner column of the first-floor box-type connection node to achieve the connection between the concrete foundation beam-column joint and the first-floor box-type connection node. Specifically: After the reinforcement of the concrete foundation beams and columns of the modular box-type steel structure building is tied, the foundation connection node embedded parts are installed according to the axial positioning position of the embedded parts of the foundation node in the design drawings. The embedded parts are set on the top surface of the reinforced concrete foundation beam and column node. The embedded parts and the concrete foundation beam and column reinforcement are spot welded and fixed by reinforcing bars. The installation of the embedded parts is completed. The embedded parts steel plate is fully welded to the bottom steel plate of the first-floor corner member connection component by beveling, so that the embedded parts steel plate and the first-floor corner member connection component form an integral whole. After the concrete foundation strength of the stacked box girder reaches the design requirements, the first-layer box girder is hoisted and installed, so that the upper connecting rod of the first-layer corner fitting connecting assembly is inserted into the cavity at the bottom of the steel corner column of the corresponding first-layer box girder connecting node; grouting is carried out using the grouting holes reserved at the top steel corner column of the first-layer box girder. Specifically, after the first-layer box girder is installed in place, C40 high-strength non-shrink grout is used to grout the cavity of the steel corner column of the box girder connecting node. There are reserved grouting holes at the top steel corner column of the box girder. Grouting is poured from the top of the corner column downwards. During the grouting process, the steel wall of the corner column is continuously tapped to make the grouting material compact until the entire steel corner column is filled. Grouting is stopped after the grouting material no longer bubbles or settles. After stopping grouting, observe for 30 minutes. If the grouting material is found to settle, a second grouting is carried out. Before the grout initially sets, the intermediate layer corner fitting connecting assembly is installed in the grouting hole at the top of the first-layer box body. The intermediate layer corner fitting connecting assembly is positioned on the grouting hole of the steel corner column connection node between the first-layer box body and the intermediate-layer box body. The connecting rod of the intermediate layer corner fitting connecting assembly is inserted into the bottom cavity of the steel corner column corresponding to the intermediate-layer box body connection node. Grouting material is poured into the steel corner column of the intermediate-layer box body connection node to achieve connection between the intermediate-layer box body connection nodes. Specifically, after the grouting of the steel corner column of the first-layer box body module connection node is completed, before the grout initially sets, the intermediate layer corner fitting connecting assembly is installed and welded through the grouting hole at the top of the first-layer box body. While inserting the steel rod of the intermediate layer corner fitting connecting assembly into the top grouting hole of the steel corner column of the first-layer box body connection node, the planar position and elevation of the intermediate layer corner fitting connecting assembly are adjusted to ensure accurate positioning of the connecting assembly. Finally, the rectangular steel plate of the intermediate layer corner fitting connecting assembly is fixed to the contact surface at the top of the box body module by spot welding. The intermediate layer box is hoisted and installed, and the upper connecting rod of the intermediate layer corner fitting connecting assembly is inserted into the cavity at the bottom of the steel corner column of the corresponding intermediate layer box connection node; grouting is performed using the grouting hole reserved at the top steel corner column of the intermediate layer box; before the grouting material initially sets, the intermediate layer corner fitting connecting assembly is installed through the grouting hole at the top of the intermediate layer box. Install the components sequentially up to the top-level box, ensuring the upper connecting rods of the intermediate corner fittings of the intermediate box are inserted into the cavities at the bottom of the steel corner columns of the top-level box's connection nodes. Grout is then injected using the pre-drilled holes at the top steel corner columns of the top-level box. Before the grout initially sets, the top-level corner fittings are installed in the grouting holes at the top of the top-level box. These top-level corner fittings are positioned on the grouting holes of the steel corner column connection nodes of the top-level box, with the connecting rods inserted into the bottom cavities of the steel corner columns of the roof structure's connection nodes. Grout is then poured into the steel corner columns of the roof structure's connection nodes, thus connecting the top-level box to the roof structure's connection nodes. Hoist the roof structure, align the upper connecting rod of the top corner fitting assembly with the cavity at the bottom of the steel corner column of the roof structure connection node; grout using the pre-reserved grouting holes at the steel corner column of the top connection node of the roof structure; install the roof structure.

2. The installation and construction method according to claim 1, characterized in that, The foundation node embedded part includes an embedded plate, with vertical ribs evenly distributed at the bottom of the embedded plate, and parallel ribs provided at the ends of the vertical ribs.

3. The installation method according to claim 1 or 2, characterized in that, The first-layer corner fitting connection assembly includes a first connecting plate; a first connecting rod is disposed on the top of the first connecting plate; the first connecting rod is disposed perpendicular to the first connecting plate; a first flange corner plate is symmetrically disposed at the root of the first connecting rod, and the first flange corner plate is connected to the first connecting plate.

4. The installation method according to claim 1 or 2, characterized in that, The intermediate corner connector assembly includes a second connecting plate; A second connecting rod is provided at the top of the second connecting plate; the second connecting rod is perpendicular to the second connecting plate; a second flange corner plate is symmetrically provided at the root of the second connecting rod, and the second flange corner plate is connected to the second connecting plate. A second connecting rod is provided at the bottom of the second connecting plate, and the second connecting rod is perpendicular to the second connecting plate; a second flange corner plate is symmetrically provided at the root of the second connecting rod, and the second flange corner plate is connected to the second connecting plate.

5. The installation method according to claim 1 or 2, characterized in that, The top corner fitting connection assembly includes a third connecting plate, and a third connecting rod is disposed on the top of the third connecting plate; the third connecting rod is disposed perpendicularly to the third connecting plate; a third flange corner plate is symmetrically disposed at the root of the third connecting rod, and the third flange corner plate is connected to the third connecting plate. The bottom of the third connecting plate is provided with a second third connecting rod, which is perpendicular to the third connecting plate; the root of the second third connecting rod is symmetrically provided with a second third flange corner plate, which is connected to the third connecting plate.

6. The installation and construction method of the modular stacked steel structure according to claim 1, characterized in that, The lower connecting rod of the top corner fitting connecting assembly is inserted into the grouting hole at the top of the steel corner column of the lower box body connecting node, and the top corner fitting connecting assembly is fixed to the top contact surface of the top box body.

7. The installation and construction method of the modular stacked steel structure according to claim 1, characterized in that, The stacked box structure is hoisted using a lifting device, which is connected to the hook of the lifting mechanism via slings. During the hoisting process, the modular box unit is in a vertical hoisting state, ensuring that the position of the hook of the lifting mechanism, the lifting device, and the center of gravity of the modular box unit coincide in the vertical direction.

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