A prefabricated building that is fully assembled, fully reusable, and can be rapidly constructed, and its construction method.

Abstract

This invention relates to a fully prefabricated, fully reusable, and rapidly assembleable prefabricated building, comprising: prefabricated strip foundations for constructing the building's foundation frame; steel structural columns and beams for constructing the building's steel structure, wherein the steel structural beams and columns are detachably connected; steel truss floor slabs for constructing the building's floors; prefabricated wall panels for use as the building's vertical enclosure structure; and roof purlins used in conjunction with the steel structural beams for constructing the building's roof. This invention also relates to a construction method for this fully prefabricated, fully reusable, and rapidly assembleable prefabricated building. This invention combines prefabricated steel structures with prefabricated concrete structures, assembling prefabricated strip foundations, prefabricated wall panels, steel structural columns, steel structural beams, and steel truss floor slabs into a fully prefabricated building. Dry connection is used, making installation and dismantling convenient and quick; the structural materials can be reused after dismantling, achieving the goal of energy-saving and environmentally friendly green construction production.

Description

Technical Field

[0001] This invention relates to the field of building construction, specifically to a fully assembled, fully reusable, and rapidly conceived prefabricated building and its construction method. Background Technology

[0002] Early temporary buildings used in construction sites, industrial parks, and other places mostly used traditional prefabricated houses and shipping containers. Although these two building systems are inexpensive, they are lightweight, easily damaged, and have a short service life. In addition, temporary buildings must be dismantled after the construction period ends, and the dismantling materials cannot be reused, which leads to some environmental pollution.

[0003] Therefore, the industry has proposed prefabricated concrete and steel structure building systems. Existing prefabricated design and construction specifications use beams, slabs, and shear walls to be assembled in sections, with concrete poured at the connection nodes and cured before the next floor is constructed. However, using prefabricated floor slabs in sections according to column grid units or as a whole, connected by prestressed joint beams, requires subsequent concrete pouring and grouting. This method also involves a large amount of wet concrete work, a long construction period, and is not conducive to the secondary disassembly and reuse of components, with limited reuse of materials after dismantling.

[0004] The above problems are worth solving. Summary of the Invention

[0005] To address the issues of low assembly rates and limited material reuse after demolition caused by numerous cast-in-place construction steps in existing prefabricated building structures, this invention provides a fully assembled, fully reusable, and rapidly constructible prefabricated building and its construction method.

[0006] The technical solution of this invention is as follows:

[0007] A prefabricated building that is fully assembled, fully reusable, and can be rapidly constructed, characterized in that it includes:

[0008] Precast strip foundations, several of which are used to construct the foundation frame of a building, are provided with foundation hoisting points and several embedded connectors;

[0009] Steel structure columns, a plurality of the steel structure columns are connected to the precast strip foundation through corresponding embedded connectors;

[0010] The steel structure beams are detachably connected to the steel structure columns by bolts, and are used to construct the framework for the building's tiered slabs; the steel structure beams include transverse steel structure beams and longitudinal steel structure beams.

[0011] A steel truss floor slab, wherein both ends of the steel truss floor slab are respectively connected to two adjacent longitudinal steel structural beams to form the floor slab of the building;

[0012] Precast floor tiles, which are placed within the frame of the foundation edge to form the floor of the first floor of the building;

[0013] Precast wall panels, which are installed on the side of the building to form the wall surface of the building;

[0014] Roof purlins, which are perpendicular to the longitudinal steel structural beams at the top of the building, are used together with the longitudinal steel structural beams to form the roof of the building.

[0015] According to the present invention based on the above scheme, the prefabricated building that can be quickly constructed with full assembly and turnover also includes:

[0016] A modular bathroom, wherein the modular bathroom is installed in a corner of the first floor of the building;

[0017] Precast staircase, each section of which connects two adjacent floors;

[0018] Prefabricated doorway steps, which are used as entrance steps on the first floor of a building.

[0019] Furthermore, the four corners of the prefabricated doorway steps are provided with pre-embedded hanging nails.

[0020] Furthermore, the top surface of the precast floor tiles is provided with elliptical hoisting holes.

[0021] Furthermore, the precast floor tile has a protruding first brick groove on one side and a recessed second brick groove on the other side, and the shapes of the first brick groove and the second brick groove are adapted to each other.

[0022] Furthermore, the outer surface of the brick joints on both sides of the precast floor tiles is provided with aluminum alloy plates that match the shape of the corresponding brick joints.

[0023] According to the present invention of the above scheme, the pre-embedded connector includes pre-embedded anchor bolts, and the column base of the steel structure column is connected to the precast strip foundation through three pre-embedded anchor bolts; the column base extends inward toward the foundation frame, and a diagonal bracing plate is provided above the column base extension; two pre-embedded anchor bolts are connected to the column base inside the steel structure column, and one pre-embedded anchor bolt is connected to the edge of the column base extension outside the steel structure column.

[0024] According to the present invention of the above scheme, a boss is provided on the outer side of the precast strip foundation, and a precast ground beam is provided above the boss. The side of the precast ground beam abuts against the outer side of the steel structure column.

[0025] According to the present invention based on the above scheme, both the precast strip foundation and the precast ground beam are provided with pre-embedded steel sleeves for use as hoisting points.

[0026] According to the present invention described above, a non-shrinkage fine aggregate concrete layer is provided between the column base of the steel structure column and the precast strip foundation; a concrete pad layer is provided at the bottom of the precast strip foundation.

[0027] According to the present invention described above, an outwardly extending steel plate is welded to the end of the upper flange of the steel structure beam, and expansion bolts are provided at the end of the lower flange of the steel structure beam and the steel plate; an I-beam connecting steel is welded to the steel structure column at the location corresponding to the building's layered slab, the top plate of the I-beam connecting steel is connected to the lower surface of the steel plate by expansion bolts, the bottom plate of the I-beam connecting steel protrudes outwards, and the protruding part is connected to the lower surface of the lower flange of the steel structure beam by expansion bolts.

[0028] According to the present invention of the above scheme, a first L-shaped angle steel is welded to the lower surface of both ends of the steel truss floor slab, and a second L-shaped angle steel is welded to the lower side of the upper flange of the longitudinal steel structure beam; the first L-shaped angle steel rests on the side of the upper flange of the longitudinal steel structure beam, the first L-shaped angle steel and the second L-shaped angle steel are connected by bolts, and a pad is provided between the first L-shaped angle steel and the second L-shaped angle steel.

[0029] According to the present invention described above, a plurality of corner braces are provided between the roof purlins and the longitudinal steel structure beams, and diagonal tie rods are provided between the transverse steel structure beams of the building roof and the adjacent roof purlins.

[0030] According to the present invention described above, the precast wall panel includes a precast PC exterior wall panel and a precast ALC interior wall panel. Two adjacent precast PC exterior wall panels are interlocked, and two adjacent precast ALC interior wall panels are connected by bolts. The precast ALC interior wall panels have reserved bolt holes on opposite sides, and hook bolts are provided at the reserved bolt holes. The tail end of the hook bolt penetrates the precast ALC interior wall panel and bends outward. A splicing plate is provided at the joint of two adjacent precast ALC interior wall panels, and a pair of corresponding hook bolts on the two precast ALC interior wall panels hook onto both sides of the splicing plate when tightened.

[0031] Furthermore, the prefabricated ALC interior wall panel has a protruding first tongue and groove on one side and a recessed second tongue and groove on the other side, with the first tongue and groove and the second tongue and groove being adapted to each other in shape.

[0032] Furthermore, the precast PC exterior wall panel is made of polymer-bonded concrete, and the precast ALC interior wall panel is made of autoclaved lightweight concrete.

[0033] This invention also provides a construction method for a fully assembled, fully reusable, and rapidly conceived prefabricated building, comprising the following steps:

[0034] Step 1: Prefabricate components in the factory;

[0035] The components include: precast strip foundations, steel structural columns, steel structural beams, steel truss floor slabs, precast ground beams, precast stairs, precast wall panels, roof purlins, precast bathrooms, precast floor tiles, and precast doorsteps;

[0036] Step 2: Earthwork excavation in the building area;

[0037] Step 3: Hoist the precast strip foundation and bury it in the corresponding area excavated in Step 2;

[0038] Step 4: Connect the steel structure columns to the precast strip foundations;

[0039] Step 5: Complete the basic construction of the first floor;

[0040] Step 6: Construct the framework for the tiered panels on different floors;

[0041] After the steel structure columns are verified to be correct, the steel structure beams of different floors are hoisted to form the frame of the layered slabs of different floors; during hoisting, the steel structure beams are aligned with the corresponding floor design elevations on the steel structure columns and connected.

[0042] Step 7: Lay the floor slab;

[0043] A steel truss floor slab is erected between two adjacent longitudinal steel structural beams. The ends of the steel truss floor slab are connected to the upper flange of the longitudinal steel structural beam using the first L-shaped angle steel and the second L-shaped angle steel, and then connected by bolts.

[0044] Step 8: Hoist the roof;

[0045] S801, hoisting roof steel structure frame;

[0046] At the corresponding design elevation of the roof on the steel structure column, the steel structure beam is connected to the steel structure column, adjusted and corrected, and fixed with bolts; roof purlins are installed between two adjacent longitudinal steel structure beams, and several corner braces are set between the roof purlins and the longitudinal steel structure beams; diagonal tie rods are installed between the transverse steel structure beams on the side of the roof and the adjacent roof purlins.

[0047] S802, Roofing installation;

[0048] The roof steel structure frame is fully covered with glass rock wool color steel plates;

[0049] Step 9: Install the interior and exterior walls of the building;

[0050] Precast wall panels are installed gradually from one side of the building's gable wall to the other. These precast wall panels include precast PC exterior wall panels and precast ALC interior wall panels. A string line installation method is used to ensure that the precast wall panels remain vertical.

[0051] Step 10: Steel structure painting and installation of doors and windows;

[0052] The steel structure is painted, and rust removal, anti-corrosion, and fireproofing treatments are carried out. Doors and windows are installed in the corresponding locations on the building.

[0053] According to the present invention based on the above-described scheme, step 2 further includes the following steps:

[0054] S201. Excavate earthwork in the designed building area, excavating to the bottom elevation of the precast floor tiles;

[0055] S202. After excavating along the perimeter of the area to the bottom elevation of the precast strip foundation, compact the soil in the perimeter excavation area.

[0056] S203. Before installing the precast strip foundation, pour a concrete cushion layer first;

[0057] According to the present invention based on the above-described scheme, step 4 further includes the following steps:

[0058] S401. Pour non-shrink fine aggregate concrete between the steel structure column and the precast strip foundation;

[0059] S402. Align the mounting holes on the column base of the steel structure column with the embedded connectors on the precast strip foundation. After initial alignment, tighten the embedded connectors.

[0060] S403. Weld a diagonal brace plate above the extension inside the column base of the steel structure column as a supporting structure to strengthen the structural strength of the steel structure column.

[0061] S404. The precast ground beam is hoisted and placed on the raised platform outside the precast strip foundation to bear external loads.

[0062] According to the present invention based on the above-described scheme, step 5 further includes the following steps:

[0063] S501. In the building area excavated during the leveling step, precast floor tiles are laid inside the foundation frame.

[0064] S502. Place a prefabricated doorway step outside the foundation frame;

[0065] S503, hoisted integrated bathroom and prefabricated staircase;

[0066] According to the present invention based on the above scheme, the connection step of the steel structure beam and the steel structure column in step 6 includes the following steps:

[0067] S601. Steel plates are welded to the upper flange of steel structure beams, and I-beam connecting steel is welded to the perimeter of steel structure columns.

[0068] S602, the steel plate rests on the top plate of the I-beam connecting steel and is connected by expansion bolts; the lower flange of the steel structure beam rests on the protruding part of the bottom plate of the I-beam connecting steel and is connected by expansion bolts.

[0069] According to the above-described solution, the beneficial effects of this invention are as follows:

[0070] This invention combines prefabricated steel structures with prefabricated concrete structures, rapidly assembling reusable components such as precast strip foundations, precast wall panels, steel structural columns, steel structural beams, and steel truss floor slabs into a fully prefabricated building. The assembly process uses dry connection, making installation and dismantling convenient and shortening the project cycle. At the same time, the components can be reused after dismantling, achieving water conservation, land conservation, material conservation, and energy conservation, which meets the environmental protection goals of green construction and production. Attached Figure Description

[0071] Figure 1 This is a floor plan of the building of the present invention;

[0072] Figure 2 This is a second-floor plan of the building of this invention;

[0073] Figure 3 This is a roof plan of the building according to the present invention;

[0074] Figure 4 This is a schematic diagram showing the connection between the precast strip foundation and the steel structure column in this invention;

[0075] Figure 5 This is a schematic diagram of the connection between the steel structure column and the steel structure beam in this invention;

[0076] Figure 6 This is a schematic diagram showing the connection between the steel structure beam and the steel truss floor slab in this invention;

[0077] Figure 7 for Figure 6 Enlarged view of section A;

[0078] Figure 8 This is a schematic diagram of the structure of the prefabricated floor tiles in this invention;

[0079] Figure 9 This is a schematic diagram of the prefabricated ALC interior wall panel in this invention.

[0080] In the diagram, 1. Precast strip foundation; 11. Embedded anchor bolts; 12. Precast ground beam; 13. Non-shrink fine aggregate concrete layer; 14. Concrete cushion layer;

[0081] 2. Steel structure column; 21. Column base; 22. Diagonal bracing plate; 23. I-beam connecting steel;

[0082] 3. Steel structural beams; 301. Transverse steel structural beams; 302. Longitudinal steel structural beams; 31. Steel plates; 32. Expansion bolts;

[0083] 4. Reinforced truss floor slab; 41. First L-shaped angle steel; 42. Second L-shaped angle steel; 43. Base plate; 401. Slab surface; 402. Short reinforcing bars; 403. Bottom chord reinforcing bars; 404. Web reinforcing bars;

[0084] 5. Precast floor tiles; 51. First brick tongue and groove; 52. Second brick tongue and groove; 53. Aluminum alloy plate;

[0085] 6. Prefabricated bathroom unit; 7. Prefabricated doorway steps;

[0086] 8. Roof purlins; 81. Corner braces; 82. Diagonal tie rods;

[0087] 9. Precast ALC interior wall panel; 91. Tongue and groove joint of the first panel; 92. Tongue and groove joint of the second panel; 93. Hook bolt; 94. Splicing panel. Detailed Implementation

[0088] To better understand the purpose, technical solution, and technical effects of this invention, the invention will be further explained and described below in conjunction with the accompanying drawings and embodiments. It should also be stated that the embodiments described below are only for explaining this invention and are not intended to limit this invention.

[0089] It should be noted that when a component is described as "fixed to" or "set on" another component, it can be directly on the other component or there may be an intervening component. When a component is described as "connected to" another component, it can be directly connected to the other component or there may be an intervening component.

[0090] The terms "upper," "lower," "left," "right," "front," "back," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or position based on the accompanying drawings and are used only for ease of description and should not be construed as limiting the present technical solution. "Several" means two or more, unless otherwise explicitly specified.

[0091] like Figures 1-3 As shown, a prefabricated building that is fully assembled, fully reusable, and can be rapidly constructed includes:

[0092] Precast strip foundation 1, several precast strip foundations 1 are used to build the foundation frame of the building, and the precast strip foundation 1 is equipped with foundation hoisting points and several embedded connectors;

[0093] Steel structure column 2, several steel structure columns 2 are connected to the precast strip foundation 1 through corresponding embedded connectors;

[0094] Steel structure beam 3 is detachably connected to steel structure column 2 by bolts. Steel structure beam 3 is used to build the frame of the building's layered slabs. Steel structure beam 3 includes transverse steel structure beam 301 and longitudinal steel structure beam 302. The longitudinal steel structure beam 302 and transverse steel structure beam 301 are connected by angle steel brackets (not shown in the figure) and bolts. Specifically, holes are drilled at the positions where the transverse steel structure beam 301 needs to be connected to the longitudinal steel structure beam 302, angle steel brackets are installed, the longitudinal steel structure beam 302 is installed on the angle steel brackets, and bolts are used to connect and fix the longitudinal steel structure beam 302 to the angle steel brackets.

[0095] The steel truss floor slab 4 is connected at both ends to two adjacent longitudinal steel structure beams 302 to form the floor slab of the building.

[0096] Precast floor tiles 5 are placed within the frame of the foundation edge to form the floor of the first floor of the building.

[0097] Precast wall panels are installed on the sides of a building to form the building's walls.

[0098] Roof purlin 8, the roof purlin 8 is perpendicular to the longitudinal steel structure beam 302 at the top of the building, the roof purlin 8 and the longitudinal steel structure beam 302 are used to build the roof of the building.

[0099] This invention combines prefabricated steel structures with prefabricated concrete structures, assembling prefabricated strip foundations, prefabricated wall panels, steel structural columns, steel structural beams, and reinforced truss floor slabs into a fully prefabricated building. All connections are made using dry methods, making installation and dismantling convenient and quick. The components required for the designed building are prefabricated in the factory and then transported to the construction site for assembly. On-site construction is fast, and all components can be directly hoisted and erected, resulting in good integrity and durability. After dismantling, the structural materials can be reused, achieving the green construction production goals of water conservation, land conservation, material conservation, energy conservation, and environmental protection.

[0100] In this invention, the fully assembled, fully turnover-enabled, and rapidly assembleable prefabricated building also includes:

[0101] Integrated toilet 6, installed in a corner of the first floor of the building;

[0102] Precast staircase (not shown in the figure), each section of precast staircase connects two adjacent floors;

[0103] Precast doorway steps 7 are used for the entrance steps on the first floor of a building.

[0104] This invention prioritizes standardized, universal, and modular components for everything from the building frame and floor paving to infrastructure such as toilets and steps. It enables the pre-production of the required components for a completed building in the factory, which are then transported to the construction site for assembly and installation. This allows all components to be reusable. Therefore, this invention provides a prefabricated building that is easy to install and dismantle, energy-saving, environmentally friendly, and fully reusable and rapidly constructible.

[0105] In one optional embodiment, the four corners of the prefabricated doorstep 7 are provided with pre-embedded hanging nails; the top surface of the prefabricated floor tile 5 is provided with elliptical lifting holes; thus, the prefabricated doorstep 7 and the prefabricated floor tile 5 can be lifted and installed by a crane, saving manpower and increasing the installation speed.

[0106] like Figure 8 As shown, in a preferred embodiment, the precast floor tile 5 has a protruding first brick tongue-and-groove 51 on one side and a recessed second brick tongue-and-groove 52 on the other side, with the first and second brick tongue-and-groove 51 and 52 being shaped to fit each other. When laying the precast floor tiles 5, if the first brick tongue-and-groove 51 of each precast floor tile 5 faces the same direction, then the second brick tongue-and-groove 52 faces the opposite direction; the first brick tongue-and-groove 51 of the previous precast floor tile 5 is connected to the second brick tongue-and-groove 52 of the next precast floor tile 5, and so on, to finally complete the laying of the base slab of the first floor of the building. The precast floor tiles 5 at the corners can be cut to a suitable size.

[0107] In a preferred embodiment, the outer surface of the brick joints on both sides of the precast floor tile 5 is provided with aluminum alloy plates 53 that match the shape of the corresponding brick joints. Specifically, the aluminum alloy plate 53 covering the first brick joint 51 of the precast floor tile 5 protrudes outward, while the aluminum alloy plate 53 covering the second brick joint 52 of the precast floor tile 5 is recessed inward. The aluminum alloy plates 53 can protect the edges and corners of the precast floor tile 5 from damage and improve the turnover rate of the precast floor tile 5; and the aluminum alloy plates 53 have the advantages of being lightweight, high-strength, rigid, durable, corrosion-resistant, and easy to process.

[0108] like Figure 4 As shown, in an optional embodiment, the pre-embedded connector includes pre-embedded anchor bolts 11. The column base 21 of the steel structure column 2 is connected to the precast strip foundation 1 through three pre-embedded anchor bolts 11. The tail bar of the pre-embedded anchor bolt 11 is embedded inside the precast strip foundation 1, and the threaded end of the pre-embedded anchor bolt 11 protrudes from the precast strip foundation 1. The nut is tightened at the threaded end to fix the column base 21 to the precast strip foundation 1.

[0109] The column base 21 extends inward toward the foundation frame, and a bracing plate 22 is provided above the extension of the column base 21. The bracing plate 22 strengthens the support of the steel structure column 2. Of the three pre-embedded anchor bolts 11 of the column base 21 of the steel structure column 2, two pre-embedded anchor bolts 11 are connected to the column base 21 inside the steel structure column 2, and one pre-embedded anchor bolt 11 is connected to the edge of the extension of the column base 21 outside the steel structure column 2, as shown in the reference. Figure 4 .

[0110] The precast strip foundation 1 has a protrusion on its outer side, and a precast ground beam 12 is installed above the protrusion. The side of the precast ground beam 12 abuts against the outer side of the steel structure column 2. The precast ground beam 12 and the precast strip foundation 1 are used together to form a structurally sound foundation frame, providing a stable foundation for the building. Both the precast strip foundation 1 and the precast ground beam 12 have pre-embedded steel sleeves inside, which are used as lifting points. Cranes can move and place the precast strip foundation 1 or the precast ground beam 12 through the corresponding lifting points, eliminating the need for manual handling, which improves efficiency and ensures construction safety.

[0111] A non-shrink fine aggregate concrete layer 13 is provided between the column base 21 of the steel structure column 2 and the precast strip foundation 1. The non-shrink fine aggregate concrete layer 13 provides a flat surface for the column base 21 of the steel structure column 2, ensuring that the steel structure column 2 is vertical and does not tilt, providing a stable support column for the building. A concrete pad 14 is provided at the bottom of the precast strip foundation 1. The concrete pad 14 provides a relatively flat bottom surface for the precast strip foundation 1, avoiding instability in the installation of the precast strip foundation 1, and also contributing to the installation firmness of the steel structure column 2 above.

[0112] The steel structure beams and steel structure columns 2 of this invention are fixed by bolt connection, which is not only convenient for installation and disassembly, but also allows for reuse after the prefabricated building has reached the end of its service life and has been dismantled. Specifically, an outwardly extending steel plate 31 is welded to the end of the upper flange of the steel structure beam, and expansion bolts 32 are provided at the end of the lower flange of the steel structure beam and the steel plate 31. I-beam connecting steel 23 is welded to the steel structure column 2 at the floor slabs (i.e., the floor slabs of the second floor, the third floor, the fourth floor, etc.) of the building. The top plate of the I-beam connecting steel 23 is connected to the lower surface of the steel plate 31 and fixed by expansion bolts 32. The bottom plate of the I-beam connecting steel 23 protrudes outward, and the protruding part is connected to the lower surface of the lower flange of the steel structure beam and fixed by expansion bolts 32.

[0113] like Figure 6 and Figure 7As shown, in this invention, after the building's layered slab frame is completed, a steel truss floor slab 4 is used to lay the floor surface. Specifically, a first L-shaped angle steel 41 is welded to the lower surface of both ends of the steel truss floor slab 4, and a second L-shaped angle steel 42 is welded to the lower surface of the side of the upper flange of the longitudinal steel structure beam 302. The first L-shaped angle steel 41 is placed against the side of the upper flange of the longitudinal steel structure beam 302, and the first L-shaped angle steel 41 and the second L-shaped angle steel 42 are connected by bolts, and a pad 43 is provided between the first L-shaped angle steel 41 and the second L-shaped angle steel 42.

[0114] In an optional embodiment, the steel truss floor slab 4 includes a slab surface 401, short steel bars 402 located at both ends of the slab surface 401, a lower chord steel bar 403 connected to the short steel bars 402, and a zigzag web steel bar 404 located between the slab surface 401 and the short steel bars 402.

[0115] like Figure 3 As shown, in this invention, the roof purlins 8 and the longitudinal steel beams 302 together construct the building's roof. During connection, several corner braces 81 are provided between the roof purlins 8 and the longitudinal steel beams 302 to provide support and reinforcement. Diagonal braces 82 are provided between the transverse steel beams 301 of the building's roof and the adjacent roof purlins 8. One end of the diagonal brace 82 is connected to the midpoint of the roof purlin 8, and the other end is connected to the connection point between the longitudinal steel beam 302 and the transverse steel beam 301 / steel column 2. The diagonal brace 82 increases the stability of the roof structure. After the foundation of the building's roof is completed, glass rock wool color steel panels are laid on the roof as the roof enclosure structure.

[0116] In this invention, the precast wall panel includes a precast PC exterior wall panel (not shown in the figure) and a precast ALC interior wall panel 9. The precast PC exterior wall panel is made of polymer-bonded concrete, and the precast ALC interior wall panel 9 is made of autoclaved lightweight concrete. One side of the precast PC exterior wall panel has an insertion hole, and the other side has a protruding insertion rod. The insertion rod of one precast PC exterior wall panel can be inserted into the insertion hole of another precast PC exterior wall panel. Therefore, adjacent precast PC exterior wall panels can be connected by insertion, making installation convenient and quick.

[0117] like Figure 9As shown, adjacent prefabricated ALC interior wall panels 9 are connected by bolts. In one specific embodiment, pre-reserved bolt holes are provided on opposite sides of the prefabricated ALC interior wall panels 9, and hook bolts 93 are provided at the pre-reserved bolt holes. Tightening and loosening of hook bolts 93 is performed on the outer wall surface of the prefabricated ALC interior wall panels 9. The tail end of the hook bolt 93 penetrates the prefabricated ALC interior wall panel 9 and bends outward. When two prefabricated ALC interior wall panels 9 are spliced, the tail ends of the hook bolts 93 on the two panels face each other. A splicing plate 94 is provided at the splicing point of two adjacent prefabricated ALC interior wall panels 9. When tightened, a pair of corresponding hook bolts 93 on the two prefabricated ALC interior wall panels 9 hook onto both sides of the splicing plate 94.

[0118] One side of the prefabricated ALC interior wall panel 9 has a protruding first tongue-and-groove joint 91, and the other side has a recessed second tongue-and-groove joint 92. The first tongue-and-groove joint 91 and the second tongue-and-groove joint 92 are shaped to fit together. During splicing, the first tongue-and-groove joint 91 of the previous prefabricated ALC interior wall panel 9 aligns with the second tongue-and-groove joint 92 of the next prefabricated ALC interior wall panel 9, and multiple prefabricated ALC interior wall panels 9 are spliced ​​sequentially.

[0119] This invention also provides a construction method for a fully assembled, fully reusable, and rapidly conceived prefabricated building, comprising the following steps:

[0120] Step 1: Prefabricate components in the factory;

[0121] The following components are prefabricated in the factory: 1. Precast strip foundation; 2. Steel structure column; 3. Steel structure beam; 4. Steel truss floor slab; 5. Precast ground beam; 6. Precast stairs; 7. Precast wall panels; 8. Roof purlins; 9. Integrated bathroom; 10. Precast floor tiles; 11. Precast door steps.

[0122] Step 2: Earthwork excavation in the building area;

[0123] S201. Excavate the earthwork in the designed building area to the bottom elevation of the precast floor bricks, that is, the excavation depth reaches the thickness of the bricks.

[0124] S202. After excavating along the perimeter of the area to the bottom elevation of the precast strip foundation 1, compact the soil in the perimeter excavation area. That is, after the excavation depth reaches the height of the precast strip foundation 1, compact the soil.

[0125] S203. Before installing the precast strip foundation 1, pour the concrete cushion layer 14 first.

[0126] Step 3: Hoist the precast strip foundation 1 and bury it in the corresponding area excavated in step 202.

[0127] Step 4: Connect the steel structure column 2 to the precast strip foundation 1;

[0128] S401. Pour non-shrink fine aggregate concrete between steel structure column 2 and bottom precast strip foundation 1;

[0129] S402. Align the mounting holes on the column base 21 of the steel structure column 2 with the embedded connectors (i.e., embedded anchor bolts 11) on the precast strip foundation 1. After initial alignment, tighten the embedded anchor bolts 11.

[0130] S403. Weld a diagonal bracing plate 22 above the extension inside the column base 21 of the steel structure column 2 as a supporting structure to strengthen the structural strength of the steel structure column 2.

[0131] S404. The precast ground beam 12 is hoisted and placed on the protrusion outside the precast strip foundation 1. The side of the precast ground beam 12 is close to the steel structure column 2 to bear the external load.

[0132] Step 5: Complete the basic construction of the first floor;

[0133] S501, Leveling the building area excavated in step 2, laying precast floor tiles 5 inside the foundation frame area, and using aluminum alloy plates 53 as protection on the sides of the precast floor tiles 5.

[0134] S502. Place a prefabricated doorway step 7 outside the foundation frame;

[0135] S503, hoisted integrated bathroom 6, and prefabricated stairs.

[0136] Step 6: Construct the framework for the tiered panels on different floors;

[0137] After the steel structure column 2 is verified to be correct, the steel structure beams 3 of different floors are hoisted to form the frame of the layered slabs of different floors; among them, the steel structure beams 3 include transverse steel structure beams 301 and longitudinal steel structure beams 302; during hoisting, the steel structure beams are aligned with the corresponding floor design elevation on the steel structure column 2 and connected.

[0138] The connection steps between the steel structure beam and steel structure column 2 in step 6 above specifically include:

[0139] S601. Steel plate 31 is welded to the upper flange of the steel structure beam, and I-beam connecting steel 23 is welded to the perimeter of the steel structure column 2. Generally, I-beam connecting steel 23 is welded to the steel structure column 2 on the surface that needs to be connected to the steel structure beam: for example, the steel structure column 2 located in the middle needs to have I-beam connecting steel 23 welded on the left and right sides and the side facing the interior of the building, for a total of three surfaces; while the steel structure column 2 located in the corner needs to have I-beam connecting steel 23 welded on two mutually perpendicular surfaces, for a total of two surfaces; the top plate of the I-beam connecting steel 23 is flush with the middle plate, and the bottom plate of the I-beam connecting steel 23 protrudes from the middle plate.

[0140] S602, steel plate 31 rests on the top plate of I-beam connecting steel 23 and is connected by expansion bolts 32; the lower flange of the steel structure beam rests on the protruding part of the bottom plate of I-beam connecting steel 23 and is connected by expansion bolts 32.

[0141] Step 7: Lay the floor slab;

[0142] A steel truss floor slab 4 is erected between two adjacent longitudinal steel structure beams 302. The ends of the steel truss floor slab 4 are connected to the upper flange of the longitudinal steel structure beams 302 using first L-shaped angle steel 41 and second L-shaped angle steel 42, and then connected by bolts. Specific steps:

[0143] S701. The lower surfaces of both ends of the steel truss floor slab 4 are welded with the first L-shaped angle steel 41. The long side of the first L-shaped angle steel 41 is connected to the steel truss floor slab 4, the short side is facing down, and the opening of the first L-shaped angle steel 41 is facing outward.

[0144] S702, a second L-shaped angle steel 42 is welded to the lower side surface of the upper flange of the longitudinal steel structure beam 302. The opening of the second L-shaped angle steel 42 faces inward. The long side of the second L-shaped angle steel 42 is connected to the longitudinal steel structure beam 302, and the short side faces downward and is aligned with the edge of the upper flange of the longitudinal steel structure beam 302.

[0145] S703. The first L-shaped angle steel 41 is placed against the side of the upper flange of the longitudinal steel structure beam 302. The short side of the first L-shaped angle steel 41 and the short side of the second L-shaped angle steel 42 are connected by bolts, and a pad 43 is provided between the first L-shaped angle steel 41 and the second L-shaped angle steel 42.

[0146] Step 8: Hoist the roof;

[0147] S801, hoisting roof steel structure frame;

[0148] At the corresponding design elevation of the roof on the steel structure column 2, the steel structure beam is connected to the steel structure column 2, adjusted and corrected, and fixed with bolts; roof purlins 8 are installed between two adjacent longitudinal steel structure beams 302, and several corner braces 81 are set between the roof purlins 8 and the longitudinal steel structure beams 302; diagonal tie rods 82 are provided between the transverse steel structure beams 301 on the side of the roof and the adjacent roof purlins 8.

[0149] S802, Roofing installation;

[0150] The roof steel structure frame is covered with glass rock wool color steel plates.

[0151] Step 9: Install the interior and exterior walls of the building;

[0152] Precast wall panels are installed progressively from one side of the building's gable wall to the other. These precast wall panels include precast PC exterior wall panels and precast ALC interior wall panels. A string line installation method is used to ensure the precast wall panels remain vertical. The specific steps are as follows:

[0153] First, install the prefabricated ALC interior wall panels 9

[0154] S901. Place the precast ALC interior wall panel 9 using a string method, keeping the precast ALC interior wall panel 9 vertical, and connect the first tongue and groove 91 of the previous precast ALC interior wall panel 9 to the second tongue and groove 92 of the next precast ALC interior wall panel 9.

[0155] S902. Place a splicing plate 94 at the splicing joint, hook the tail ends of the hook bolts 93 on the two prefabricated ALC interior wall panels 9 onto both sides of the splicing plate 94, and tighten the hook bolts 93 so that the splicing plate 94 is tightly attached to the joint of the two prefabricated ALC interior wall panels 9.

[0156] S903. Repeat the above steps to sequentially assemble multiple prefabricated ALC interior wall panels 9.

[0157] Then install precast PC exterior wall panels

[0158] S904. Place the precast PC exterior wall panel using the string method, keeping the precast PC exterior wall panel vertical; interlock two precast PC exterior wall panels: insert the insertion rod of the first precast PC exterior wall panel into the insertion hole of the second precast PC exterior wall panel.

[0159] S905. Repeat the above steps to assemble multiple precast PC exterior wall panels in sequence.

[0160] Step 10: Steel structure painting and installation of doors and windows;

[0161] The entire steel structure of the building will be painted, and rust removal, anti-corrosion, and fireproofing treatments will be carried out. Doors and windows will be installed in the corresponding locations on the building.

[0162] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0163] The above embodiments merely illustrate several implementation methods of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A prefabricated building that is fully assembled, fully reusable, and capable of rapid construction, characterized in that: include: Precast strip foundations, several of which are used to construct the foundation frame of a building, are provided with foundation hoisting points and several embedded connectors; Both the precast strip foundation and the precast ground beam are equipped with embedded steel sleeves for use as hoisting points; Steel structure columns, a plurality of the steel structure columns are connected to the precast strip foundation through corresponding embedded connectors; The embedded connectors include embedded anchors, and the column base of the steel structure column is connected to the precast strip foundation through three embedded anchors. The column base extends inward toward the foundation frame, and a diagonal bracing plate is provided above the column base extension. Two pre-embedded anchor bolts are connected to the column base inside the steel structure column, and one pre-embedded anchor bolt is connected to the edge of the column base extension outside the steel structure column. The precast strip foundation has a protrusion on its outer side, and a precast ground beam is provided above the protrusion. The side of the precast ground beam abuts against the outer side of the steel structure column. A non-shrink fine aggregate concrete layer is provided between the column base of the steel structure column and the precast strip foundation; a concrete pad layer is provided at the bottom of the precast strip foundation. The steel structure beams are detachably connected to the steel structure columns by bolts, and are used to construct the framework for the building's tiered slabs; the steel structure beams include transverse steel structure beams and longitudinal steel structure beams. The transverse steel structure beams and longitudinal steel structure beams are connected by angle steel brackets and bolts. The transverse steel structure beams are provided with mounting holes at the locations where they need to be connected to the longitudinal steel structure beams. The angle steel brackets are installed at the mounting holes, and the longitudinal steel structure beams are erected on the angle steel brackets and fixed with bolts. The upper flange of the steel structure beam is welded to the end of an outwardly extending steel plate, and both the lower flange of the steel structure beam and the steel plate are provided with expansion bolts. The steel structure column is welded with I-beam connecting steel at the layered plate of the building. The top plate of the I-beam connecting steel is connected to the lower surface of the steel plate by expansion bolts. The bottom plate of the I-beam connecting steel protrudes outward, and the protruding part is connected to the lower surface of the lower flange of the steel structure beam by expansion bolts. A steel truss floor slab, wherein both ends of the steel truss floor slab are respectively connected to two adjacent longitudinal steel structural beams to form the floor slab of the building; The steel truss floor slab includes a slab surface, short steel bars located at both ends of the slab surface, bottom chord steel bars connected to the short steel bars, and zigzag web steel bars located between the slab surface and the short steel bars; The lower surfaces of both ends of the steel truss floor slab are welded with first L-shaped angle steel, and the lower surfaces of the sides of the upper flange of the longitudinal steel structure beam are welded with second L-shaped angle steel. The first L-shaped angle steel rests against the side of the upper flange of the longitudinal steel structure beam. The first L-shaped angle steel and the second L-shaped angle steel are connected by bolts, and a pad is provided between the first L-shaped angle steel and the second L-shaped angle steel. Precast floor tiles, which are placed within the frame of the foundation edge to form the floor of the first floor of the building; Precast wall panels, which are installed on the side of the building to form the wall surface of the building; Roof purlins, which are perpendicular to the longitudinal steel structure beams at the top of the building, and the roof purlins and the longitudinal steel structure beams are used to construct the roof of the building; A modular bathroom, wherein the modular bathroom is installed in a corner of the first floor of the building; Precast staircase, each section of which connects two adjacent floors; Prefabricated doorway steps, which are used as entrance steps on the first floor of a building.

2. The prefabricated building capable of rapid construction with full assembly and turnover as described in claim 1, characterized in that, Several corner braces are provided between the roof purlins and the longitudinal steel structure beams, and diagonal tie rods are provided between the transverse steel structure beams of the building roof and the adjacent roof purlins.

3. A construction method for realizing a prefabricated building that is fully assembled, fully reusable, and rapidly assembleable as described in claim 1, characterized in that, Includes the following steps: Step 1: Prefabricate components in the factory; The components include: precast strip foundations, steel structural columns, steel structural beams, steel truss floor slabs, precast ground beams, precast stairs, precast wall panels, roof purlins, precast bathrooms, precast floor tiles, and precast doorsteps; Step 2: Earthwork excavation in the building area; Step 3: Hoist the precast strip foundation and bury it in the corresponding area excavated in Step 2; Step 4: Connect the steel structure columns to the precast strip foundations; Step 5: Complete the basic construction of the first floor; Step 6: Construct the framework for the tiered panels on different floors; After the steel structure columns are verified to be correct, the steel structure beams of different floors are hoisted to form the frame of the layered slabs of different floors; during hoisting, the steel structure beams are aligned with the corresponding floor design elevations on the steel structure columns and connected. Step 7: Lay the floor slab; A steel truss floor slab is erected between two adjacent longitudinal steel structural beams. The ends of the steel truss floor slab are connected to the upper flange of the longitudinal steel structural beam using the first L-shaped angle steel and the second L-shaped angle steel, and then connected by bolts. Step 8: Hoisting the roof, including the following steps: S801, hoisting roof steel structure frame; S802, Roofing installation; The roof steel structure frame is fully covered with glass rock wool color steel plates; Step 9: Install the interior and exterior walls of the building; Precast wall panels are installed gradually from one side of the building's gable wall to the other. These precast wall panels include precast PC exterior wall panels and precast ALC interior wall panels. A string line installation method is used to ensure that the precast wall panels remain vertical. Step 10: Steel structure painting and installation of doors and windows; The steel structure is painted, and rust removal, anti-corrosion, and fireproofing treatments are carried out. Doors and windows are installed in the corresponding locations on the building.

4. The construction method for a fully assembled, fully reusable, and rapidly conceived prefabricated building according to claim 3, characterized in that, Step 4 also includes the following steps: S401. Pour non-shrink fine aggregate concrete between the steel structure column and the precast strip foundation; S402. Align the mounting holes on the column base of the steel structure column with the embedded connectors on the precast strip foundation. After initial alignment, tighten the embedded connectors. S403. Weld a diagonal brace plate above the extension inside the column base of the steel structure column as a supporting structure to strengthen the structural strength of the steel structure column. S404. The precast ground beam is hoisted and placed on the raised platform outside the precast strip foundation to bear external loads.

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