Fabricated steel frame house construction process

Abstract

The application provides a construction process of a fabricated steel frame house, which comprises the following steps: (a) after the foundation and the ground layer are built, a plurality of first-layer steel columns are installed at the preset positions of the foundation respectively; (b) a plurality of first-layer EPS cavity modules are arranged and stacked on the foundation of the outer wall, and filling materials are filled in the cavities of the first-layer EPS cavity modules, and each first-layer steel column installed on the foundation of the outer wall penetrates through the cavity of the first-layer EPS cavity module stacked at the preset position of the foundation; (c) after the first-layer EPS cavity modules are stacked to the floor elevation position and the filling materials are filled, the first-layer steel columns are connected by using the first-layer steel beams, and the first-layer steel beams inserted between the first-layer steel columns of the first-layer EPS cavity modules are embedded into the cavities of the first-layer EPS cavity modules at the top; and (d) a floor or a roof cover is built above the first-layer steel beams. The application can ensure the construction speed of the house and greatly improve the indoor space of the EPS module house.

Description

Technical Field

[0001] This invention relates to the field of modular construction, and more specifically, to a construction process for prefabricated steel frame houses. Background Technology

[0002] Expanded polystyrene (EPS) is a rigid, closed-cell foam plastic. EPS modular construction is a new type of composite building constructed using flame-retardant polystyrene foam modules as templates and thermal insulation layers, with concrete poured into the cavity between them. It features fast construction speed and good thermal insulation performance, making it very suitable for the construction of low-rise buildings.

[0003] However, the aforementioned EPS modular buildings mainly rely on EPS modular walls for load-bearing, which makes the interior space of the house relatively limited and its usage flexibility poor. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a construction process for prefabricated steel frame houses, which addresses the issue of relatively limited internal space in EPS module buildings.

[0005] The technical solution of this invention to solve the above-mentioned technical problems is to provide a construction process for prefabricated steel frame houses, including the following steps: (a) After the foundation and ground floor are constructed, several first-floor steel columns are installed at predetermined positions on the foundation, which includes the outer wall foundation and the inner wall foundation; (b) Multiple first-layer EPS cavity modules are arranged and stacked on the outer wall foundation, and filling material is filled into the cavity of the first-layer EPS cavity module. Each first-layer steel column installed on the outer wall foundation passes through the cavity of the first-layer EPS cavity module stacked at a predetermined position on the foundation. (c) After the first-layer EPS cavity module is stacked at the floor level and filled with filling material, the first-layer steel beam is used to connect the first-layer steel column, and the first-layer steel beam located between the two first-layer steel columns inserted into the first-layer EPS cavity module is embedded in the cavity of the first-layer EPS cavity module located at the top. (d) Construct a floor slab or roof over the first-floor steel beams.

[0006] As a further improvement of the present invention, the construction process also includes: (e) Install intermediate layer steel columns at a predetermined position on the floor slab, with the bottom of each intermediate layer steel column connected and fixed to a first layer steel column. (f) Multiple intermediate layer EPS cavity modules are arranged and stacked on the floor above the first layer EPS cavity module, and filling material is filled into the cavity of the intermediate layer EPS cavity module. Each intermediate layer steel column connected to the first layer steel column passing through the first layer EPS cavity module passes through the cavity of the intermediate layer EPS cavity module stacked on the floor. (g) After the intermediate layer EPS cavity module is stacked at the floor level and filled with filling material, the intermediate layer steel beam is used to connect the intermediate layer steel column, and the intermediate layer steel beam located between the two intermediate layer steel columns inserted into the intermediate layer EPS cavity module is embedded in the cavity of the intermediate layer EPS cavity module located at the top. (h) Construct a floor slab or roof over the intermediate steel beams.

[0007] As a further improvement of the present invention, the height of the first-floor EPS cavity module is less than the floor elevation, and step (b) includes: (b1) Multiple first-layer EPS cavity modules are stacked on the outer wall foundation to form a single EPS cavity module layer, and steel wire mesh and filling material are placed in the cavity of the single EPS cavity module layer. (b2) Multiple first-layer EPS cavity modules are stacked on top of the single EPS cavity module layer to form another single EPS cavity module layer, and steel wire mesh and filling material are placed in the cavity of the single EPS cavity module layer until the single EPS cavity module layer reaches the floor level.

[0008] As a further improvement of the present invention, the height of the first-floor EPS cavity module is less than the floor elevation, and step (b) includes: (b1') Multiple first-floor EPS cavity modules are stacked sequentially from bottom to top on the outer wall foundation until the floor level is reached; (b2') Place a wire mesh and filler material inside the cavity of the EPS cavity module. As a further improvement of the present invention, the construction process also includes: after the first-floor EPS cavity modules are stacked at the floor level and filled with filling material, the inner wall is built on the inner wall foundation or prefabricated wall panels are installed to form the inner wall.

[0009] As a further improvement of the present invention, in step (a), the first-floor steel columns are respectively installed at each corner position of the outer wall foundation, each corner position of the inner wall foundation, and the intersection position of the outer wall foundation and the inner wall foundation. As a further improvement of the present invention, the first-floor EPS cavity module includes: a T-shaped shear wall module, an L-shaped shear wall module and a straight shear wall module, and the T-shaped shear wall module and the L-shaped shear wall module respectively include column holes for the first-floor steel columns to pass through. In step (b), the L-shaped shear wall module is stacked at the corner position of the outer wall foundation, and the T-shaped shear wall module is stacked at the intersection position of the outer wall foundation and the inner wall foundation.

[0010] As a further improvement of the present invention, step (b) includes: using a first-floor window beam to connect two first-floor steel columns on both sides of the window at the upper edge of the window, and using a first-floor door beam to connect two first-floor steel columns on both sides of the doorway at the upper edge of the doorway.

[0011] As a further improvement of the present invention, the first layer steel beam is made of H-beam, and the first layer steel beam includes a beam body and a beam end plate prefabricated at the end of the beam body. The beam body is perpendicular to the beam end plate, and the beam end plate has a plurality of fourth fixing holes. The first-layer steel column is made of square steel tube. The first-layer steel column includes a first column body and a second connecting column prefabricated at the top of the first column body and coaxial with the first column body. The wall thickness of the second connecting column is greater than the wall thickness of the first column body. At least one side wall of the second connecting column has a plurality of fifth fixing holes. The height of the second connecting column is greater than the height of the beam end plate. The width of the side wall of the second connecting column with the fifth fixing holes is greater than the width of the beam end plate. The first-layer steel beam and the first-layer steel column are fixed by attaching the beam end plate to the side wall of the second connecting column with the fifth fixing hole, and are locked together by fasteners passing through the fourth fixing hole and the fifth fixing hole.

[0012] As a further improvement of the present invention, each flange of the first-layer steel beam has an arc-shaped notch, and the ratio of the distance between the arc-shaped notch and the beam end plate to the width of the flange is 0.5-0.75, and the ratio of the dimension of the arc-shaped notch in the length direction of the beam body to the height of the beam body is 0.65-0.85.

[0013] The present invention has the following beneficial effects: by constructing a frame with first-floor steel columns and first-floor steel beams, and by using EPS cavity modules as templates for pouring the exterior walls and forming the insulation layer, the indoor space of EPS module houses can be greatly increased while ensuring the speed of house construction. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the construction process of the prefabricated steel frame house provided in the embodiment of the present invention; Figure 2 Is using Figure 1A schematic diagram illustrating the construction process of prefabricated steel frame houses. Figure 3 This is a schematic diagram of the construction process of a prefabricated steel frame house provided in another embodiment of the present invention; Figure 4 Is using Figure 3 A schematic diagram illustrating the construction process of prefabricated steel frame houses. Figure 5 This is a partial structural diagram of a house constructed using the prefabricated steel frame house construction process provided in this embodiment of the invention. Figure 6 This is a schematic diagram of the L-shaped shear wall module used in the construction process of the prefabricated steel frame house provided in the embodiment of the present invention; Figure 7 This is a schematic diagram of the T-shaped shear wall module used in the construction process of the prefabricated steel frame house provided in the embodiment of the present invention; Figure 8 This is a schematic diagram of the linear shear wall module used in the construction process of the prefabricated steel frame house provided in the embodiments of the present invention; Figure 9 This is a schematic diagram of the connection between the first-floor steel columns and the square steel embedded parts in the construction process of the prefabricated steel frame house provided in the embodiment of the present invention; Figure 10 This is a schematic diagram of the connection between the first-floor steel columns and the first-floor steel beams in the construction process of the prefabricated steel frame house provided in the embodiment of the present invention; Figure 11 yes Figure 10 Cross-sectional view of the connection between the steel columns and steel beams on the first floor; Figure 12 This is a schematic diagram of the connection between the first-floor steel columns and the intermediate-floor steel columns in the construction process of the prefabricated steel frame house provided in the embodiment of the present invention. Detailed Implementation

[0015] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0016] like Figure 1 The diagram shown is a schematic flow chart of the construction process for a prefabricated steel frame house provided in an embodiment of the present invention. This construction process can be applied to the construction of low-rise houses with 1-3 floors. (Combined with...) Figure 2 As shown, the construction process of the prefabricated steel frame house in this embodiment includes the following steps: Step S10: After the foundation and ground floor are constructed, several first-floor steel columns are installed at preset positions on the foundation, which includes the external wall foundation and the internal wall foundation.

[0017] The foundation can be a ring beam foundation or an independent foundation made of reinforced concrete, and embedded parts are installed in the aforementioned ring beam foundation or independent foundation. These embedded parts include, for example, horizontally arranged steel plates and bolts fixed to the steel plates. The exterior wall foundation refers to the outermost part of the foundation, while the interior wall foundation is located within the ring enclosed by the exterior wall foundation. Specifically, the aforementioned foundation can also use precast reinforced concrete components manufactured in a factory, and these precast components contain embedded parts.

[0018] Combination Figure 9 , Figure 10 As shown, the first-floor steel column 42 can be made of square steel tubing (i.e., steel tubing with a rectangular cross-section). The forming, fireproofing, and rust prevention treatment of the first-floor steel column 42 are all completed in the factory. A fixing edge or fixing plate with fixing holes can be provided at the bottom end of the first-floor steel column 42. The first-floor steel column 42 is fixed to the embedded parts through the fixing edge or fixing plate, and the first-floor steel column 42 is vertical. In one embodiment of the invention, the embedded parts can be located at each corner of the external wall foundation, each corner of the internal wall foundation, and the intersection of the external wall foundation and the internal wall foundation. Correspondingly, the first-floor steel column 42 is installed at each corner of the external wall foundation, each corner of the internal wall foundation, and the intersection of the external wall foundation and the internal wall foundation. Because the first-floor steel column 42 is prefabricated, on-site steel reinforcement binding is avoided, improving construction efficiency while ensuring the structural strength of the building.

[0019] Step S20: Arrange and stack multiple first-layer EPS cavity modules on the exterior wall foundation, and fill the cavities of the first-layer EPS cavity modules with filling material. Each first-layer steel column passes through the cavity of the first-layer EPS cavity module stacked at a predetermined position on the foundation. The filling material can be ordinary concrete with high strength after hardening, or it can be thermal insulation mortar, environmentally friendly mortar, or concrete-like building materials with relatively low strength after hardening. That is, the strength of the filling material after hardening can be lower than that of the hardened concrete.

[0020] Combination Figure 5As shown, after the first-layer steel columns 42 are installed, the first-layer EPS cavity modules 41 are stacked on the outer wall foundation in a staggered interlocking manner, while the first-layer EPS cavity modules 41 do not need to be stacked on the inner wall foundation. After the first-layer EPS cavity modules 41 are stacked, a single row of steel mesh is placed inside the cavity of the EPS cavity modules 41, and then the filling material is filled layer by layer to make the first-layer EPS cavity modules 41, steel mesh, and filling material tightly bonded together, forming a wall that integrates insulation and structure. At the same time, in order to avoid exposure and improve the overall structural strength, each first-layer steel column 42 fixed to the outer wall foundation passes through the cavity of the first-layer EPS cavity module 41 stacked at a predetermined position on the outer wall foundation and is cast integrally with the filling material inside the cavity.

[0021] In one embodiment of the present invention, all first-layer EPS cavity modules 41 have the same height, and the height of each first-layer EPS cavity module 41 is less than the floor elevation. Accordingly, when stacking the first-layer EPS cavity modules 41 and filling them with filler material, multiple first-layer EPS cavity modules 41 can be stacked on the outer wall foundation to form a single EPS cavity module layer, and wire mesh and filler material can be placed in the cavity of the single EPS cavity module layer. Then, multiple first-layer EPS cavity modules are stacked above the single EPS cavity module layer to form another single EPS cavity module layer (the splicing positions of the upper and lower EPS cavity module layers are staggered), and wire mesh and filler material can be placed in the cavity of this single EPS cavity module layer until the single EPS cavity module layer reaches the floor elevation. That is, by stacking a ring of first-layer EPS cavity modules 41 and then placing the steel mesh and filler material, it can be ensured that the filler material fully fills the cavity of the EPS cavity module and avoid the formation of local cavities.

[0022] In another embodiment of the invention, all first-floor EPS cavity modules 41 have the same height, and the height of each first-floor EPS cavity module 41 is less than the floor elevation. When stacking and filling the first-floor EPS cavity modules 41, multiple first-floor EPS cavity modules 41 can be stacked sequentially from bottom to top on the outer wall foundation (the splicing positions of the upper and lower first-floor EPS cavity modules 41 are staggered during stacking) until the floor elevation is reached; then, wire mesh and filling material are placed inside the cavities of the first-floor EPS cavity modules 41. That is, the filling material is filled after the first-floor EPS cavity modules 41 of the entire floor are stacked. This method can improve construction efficiency, but there may be some cavities of the first-floor EPS cavity modules 41 that are not fully filled with filling material.

[0023] Step S30: After the first-floor EPS cavity modules are stacked at the floor level and filled with filling material, the first-floor steel beams are used to connect the first-floor steel columns. The first-floor steel beams located between the two first-floor steel columns inserted into the first-floor EPS cavity modules are embedded into the cavity of the first-floor EPS cavity modules located at the top.

[0024] The first-floor steel beam 43 can be made of H-beams, and its forming, fireproofing, and rust prevention treatment are all completed in the factory. For example... Figure 5 As shown, the first-floor steel beam 43 is manufactured in the factory, transported to the construction site, and fixed to the first-floor steel columns 42 using fasteners. The first-floor steel beam 43 connects not only the two first-floor steel columns 42 installed on the inner wall foundation and the two first-floor steel columns 42 respectively fixed to the outer wall foundation and the inner wall foundation, but also two adjacent first-floor steel columns 42 fixed to the outer wall foundation. Furthermore, to prevent the first-floor steel beam 43 from being exposed and to improve structural strength, the first-floor steel beam 43 located between the two first-floor steel columns 42 inserted into the first-floor EPS cavity module is embedded into the cavity of the top-mounted first-floor EPS cavity module 41, and is integrated with the filling material subsequently filled into the cavity.

[0025] Step S40: Form a floor slab or roof above the first-floor steel beams.

[0026] In this step, if the building has two or more floors, floor slab construction is required; if the building is single-story, roof construction can proceed directly. Furthermore, when constructing the floor slabs or roof, on-site concrete pouring can be performed using non-removable formwork, and a double-layered insulated roof can be used. Alternatively, prefabricated components can be used for the floor slabs or roof, which can be directly hoisted and installed onto the first-floor steel beams. Specifically, existing methods can be used for the construction of the floor slabs or roof; for example, a lightweight steel frame pitched roof and resin tiles can be used for the roof, which will not be elaborated further here.

[0027] The construction process of the above-mentioned prefabricated steel frame house uses the first-floor steel columns 42 and first-floor steel beams 43 to form a frame to achieve the load-bearing capacity of the house, and uses EPS cavity modules as templates for pouring the exterior walls and forming the insulation layer. This can greatly increase the interior space of the EPS module house while ensuring the speed of house construction.

[0028] In one embodiment of the present invention, the construction process of the prefabricated steel frame house, in addition to the above steps S10-S40, also includes: after the first-floor EPS cavity modules 41 are stacked to the floor level and filled with filling material, the interior walls are built on the interior wall foundation or prefabricated wall panels are installed to form the interior walls. This step can be performed before step S30 or step S40 to facilitate the hoisting and moving of the interior wall materials.

[0029] In practical applications, the use of precast wall panels to form interior walls should be carried out before the floor slab or roof is poured, in order to facilitate the hoisting of the precast wall panels; while the construction of masonry interior walls can be carried out at the same time as stacking the first-floor EPS cavity modules 41 and filling them with filling materials, or after the construction of the exterior walls, roof, etc. of the building is completed.

[0030] Unlike the exterior walls, which are filled with EPS cavity modules 41, the interior walls are formed directly on the foundation by masonry or installation of prefabricated wall panels. This results in relatively thin interior walls, significantly increasing interior space and preventing waste. Simultaneously, the exterior walls formed by the EPS cavity modules 41 provide excellent indoor insulation, meeting the building's functional needs while improving space utilization. Furthermore, since the entire building is supported by the first-floor steel columns and beams, the hardening strength requirements for the filling material in the EPS cavity modules 41 are greatly reduced. For example, construction of the upper floors can proceed without waiting for the filling material to fully harden, reducing costs and accelerating construction speed.

[0031] Combination Figures 3-4 As shown, in one embodiment of the present invention, when the building has more than one story, the construction process of the prefabricated steel frame building, in addition to the above steps S10-S40 (where step S40 is to construct a floor slab on the first-floor steel beam 43, and the constructed floor slab avoids the first-floor steel column 42 or the first-floor steel column 42 protrudes from the upper surface of the floor slab), also includes: Step S50: Combining Figure 5 As shown, intermediate layer steel columns 44 are installed at preset positions on the floor slab, and the bottom of each intermediate layer steel column 44 is connected and fixed to a first layer steel column.

[0032] The aforementioned intermediate layer steel column 44 also uses square steel tubing (i.e., steel tubing with a rectangular cross-section). The forming, fireproofing, and rust prevention treatment of this intermediate layer steel column 44 are all completed in the factory. A prefabricated connection structure can be installed at the bottom of the intermediate layer steel column 44 to connect it to the first-layer steel column 42, facilitating its installation. Because the intermediate layer steel column 44 is prefabricated, on-site rebar tying is avoided, improving construction efficiency while ensuring the structural strength of the building.

[0033] Step S60: Arrange and stack multiple intermediate layer EPS cavity modules on the floor slab above the first layer EPS cavity module, and fill the cavity of the intermediate layer EPS cavity module with filling material. Each intermediate layer steel column connected to the first layer steel column passing through the first layer EPS cavity module passes through the cavity of the intermediate layer EPS cavity module stacked on the floor slab.

[0034] After the intermediate layer steel column 44 is installed, the intermediate layer EPS cavity modules are stacked on the floor slab above the exterior wall of the first floor using a staggered interlocking method. The intermediate layer EPS cavity modules do not need to be stacked on the floor slab above the interior wall. This step can be performed using the same method as described above. Figure 1 The same procedure is followed in step S20, and will not be repeated here.

[0035] Step S70: After stacking the intermediate layer EPS cavity module at the floor level (second floor level) and filling it with filling material, use intermediate layer steel beams 45 to connect the intermediate layer steel columns 44, and the intermediate layer steel beams located between the two intermediate layer steel columns 45 inserted into the intermediate layer EPS cavity module are embedded into the cavity of the top intermediate layer EPS cavity module.

[0036] The intermediate layer steel beam 45 can have the same structure as the first layer steel beam 43 and is also fabricated in the factory. For example... Figure 5 As shown, the intermediate layer steel beam 45 is fixed to the intermediate layer steel column 44 using fasteners.

[0037] Step S80: Construct a floor slab or roof above the intermediate layer steel beams.

[0038] Specifically, this step can be referred to Figure 1 Step S40 in the process will not be described in detail here.

[0039] Steps S50-S80 described above are suitable for constructing the second or higher floors of low-rise buildings. Similarly, the construction process for the prefabricated steel frame houses described above, in addition to steps S50-S80, also includes: after stacking the intermediate layer EPS cavity modules to the floor level (e.g., the second floor) and filling them with infill material, constructing the interior walls on the floor slab above the interior walls or installing prefabricated wall panels to form the interior walls. This step can be performed before step S70 or step S80 to facilitate the hoisting and relocation of the interior wall materials.

[0040] Houses constructed using the aforementioned prefabricated steel frame building process utilize a steel frame structure for load-bearing, combined with EPS (expanded polystyrene) cavity module walls for exterior wall construction. The interior walls, however, do not require EPS cavity module casting, resulting in a more open and flexible interior space. The steel frame structure, with its standardized design, factory production, and prefabricated construction, achieves rapid construction and energy conservation. The combination of the prefabricated steel frame and EPS module walls overcomes the internal space limitations imposed by EPS modules bearing the load alone, while simultaneously improving construction efficiency and energy conservation. The entire construction process requires no large lifting equipment, only simple manual operation and small mechanical equipment.

[0041] Combination Figure 6-8As shown, in one embodiment of the invention, the first-layer EPS cavity module 41 includes a T-shaped shear wall module 412, an L-shaped shear wall module 411, and a straight shear wall module 413. The T-shaped shear wall module 412 and the L-shaped shear wall module 411 each include column holes for the first-layer steel columns to pass through. In step S20, the L-shaped shear wall module 411 is stacked at the corner of the outer wall foundation, the T-shaped shear wall module 412 is stacked at the intersection of the outer wall foundation and the inner wall foundation, and the straight shear wall module 413 is located at neither the corner of the outer wall foundation nor the intersection of the outer wall foundation and the inner wall foundation. The intermediate-layer EPS cavity module has the same structure as the first-layer EPS cavity module 41.

[0042] Each of the aforementioned first-layer EPS cavity modules 41 includes a first template, a second template, and a first connecting plate vertically connecting the first template and the second template. The first template, second template, and first connecting plate are integrally manufactured from polystyrene foam. The first template is located on the outdoor side of the first-layer EPS cavity module 41, and the second template is located on the indoor side of the first-layer EPS cavity module 41. Slots and protrusions are formed at both ends of the first and second templates in the horizontal direction, respectively. At the same end of the first-layer EPS cavity module 41, the first template has a protrusion, and the second template has a slot. Two adjacent first-layer EPS cavity modules 41 are joined together by embedding the protrusion of one first template into the slot of the other. This method ensures the sealing performance of the joint between two adjacent first-layer EPS cavity modules 41, preventing leakage and contamination of the surface of the first-layer EPS cavity module 41 during subsequent filling. Furthermore, to improve the horizontal mechanical properties (e.g., to prevent wall cracking), the seams of two adjacent first-layer EPS cavity modules 41 are staggered.

[0043] In one embodiment of the present invention, considering the load-bearing capacity of the first-floor EPS cavity module 41, step S20 includes: using a first-floor window beam to connect two first-floor steel columns on both sides of the window at the upper edge of the window, and using a first-floor door beam to connect two first-floor steel columns on both sides of the doorway at the upper edge of the doorway. Similarly, the first-floor window beam and the first-floor door beam are also prefabricated in the factory, and their structural strength can be slightly less than that of the first-floor steel beam.

[0044] In step S60, the positions of doors and windows in the intermediate layer can be processed in the same way.

[0045] Combination Figure 9As shown, in one embodiment of the present invention, the embedded part in the foundation is a square steel embedded part 11, and the top of the square steel embedded part 11 is exposed above the foundation. Accordingly, the first-layer steel column 42 can be installed to the square steel embedded part 11 in the following manner: the first-layer steel column 42 includes a first column body 421 and a first connecting column 422 prefabricated at the bottom end of the first column body 421 and coaxial with the first column body 421 (for example, the first connecting column 422 is welded and fixed to the first column body 421), and the first connecting column 422 has a plurality of first fixing holes 4221; the top end of the square steel embedded part 11 (the part exposed in the concrete) has the same cross-sectional shape as the first connecting column 422, and the radial dimension of the inner wall of the square steel embedded part 11 is adapted to the radial dimension of the outer wall of the first connecting column 422, and the square steel embedded part 11... The top end has several second fixing holes 111 corresponding to the first fixing hole (the top end of the square steel embedded part 11 has no connecting post); multiple first connecting plates 31 are provided, each first connecting plate 31 having several third fixing holes 311 corresponding to the second fixing holes 111; the first connecting post 422 is inserted into the top end of the square steel embedded part 11, and the first connecting plate 31 is set on the outer surface of the square steel embedded part 11 (the first fixing hole, the second fixing hole, and the third fixing hole are located on the same axis), and multiple fasteners passing through the third fixing hole, the second fixing hole, and the first fixing hole in sequence are used to lock and fix the first connecting plate 31, the square steel embedded part 11, and the first connecting post 422. For ease of operation, the above fasteners can be single-sided bolts or single-sided rivets to facilitate the tightening operation.

[0046] Combination Figure 5 , Figure 10 , Figure 11 As shown, when the building is a single-story structure, the first-floor steel beam 43 can be fixed to the first-floor steel column 42 in the following manner: The first-floor steel beam 43 includes a beam body 431 and a beam end plate 432 prefabricated at the end of the beam body 431. The beam body 431 is perpendicular to the beam end plate 432, and the beam end plate 432 has a plurality of fourth fixing holes (not shown in the figure). These plurality of fourth fixing holes are arranged around the junction of the beam body 431 and the beam end plate 432. Correspondingly, the first-floor steel column 42 is made of square steel tubing. The first-floor steel column 42 includes a first column body 421 and a second connecting column 423 prefabricated at the top of the first column body 421 and coaxial with the first column body 421. The wall thickness of the second connecting column 423 is greater than the wall thickness of the first column body 421.

[0047] At least one side wall of the second connecting column 423 has multiple fifth fixing holes, and the height of the second connecting column 423 is greater than the height of the beam end plate 432, and the width of the side wall of the second connecting column 423 with the fifth fixing holes is greater than the width of the beam end plate 432; the first-layer steel beam 43 and the first-layer steel column 42 are attached to the side wall of the second connecting column 423 with the fifth fixing holes by the beam end plate 432, and are locked together by fasteners 433 passing through the fourth and fifth fixing holes. In particular, to facilitate the locking operation, the fasteners 433 are single-sided fasteners, such as single-sided bolts and single-sided rivets.

[0048] In one embodiment of the present invention, each flange plate 4311 of the main body 431 of the first-layer steel beam 43 has an arc-shaped notch 4311a, and the ratio of the distance between the arc-shaped notch 4311a and the beam end plate 432 to the width of the flange plate 4311 is 0.5-0.75, that is, 0.5c≤a≤0.75c, where a is the distance between the arc-shaped notch 4311a and the beam end plate 432, and c is the width of the flange plate 4311; the arc-shaped notch 4311a is located on the main body of the beam. The ratio of the length dimension of beam 431 to the height of beam 431 is 0.65-0.85, i.e., 0.65d≤b≤0.75d, where b is the length dimension of the arc-shaped notch 4311a in beam 431, and d is the height of beam 431. The depth of the arc-shaped notch 4311a must satisfy r=(4e²+b²) / 8e, where r is the radius of the arc-shaped notch 4311a, and e is the depth of the arc-shaped notch 4311a in flange plate 4311. This structure allows the plastic hinge between the first-floor steel beam 43 and the first-floor steel column 42 to deviate from the node core area (i.e., the area where the first-floor steel column 42 connects to the first-floor steel beam 43), and instead appear on the more ductile first-floor steel beam 43, thus avoiding significant damage to the column segment at the node under seismic loading. Specifically, the position and dimensions of the arc-shaped notch 4311a can be adjusted according to the length and load-bearing capacity of the first-floor steel beam 43.

[0049] like Figure 12As shown, in another embodiment of the present invention (for buildings with two or more floors), the first-floor steel column 42 and the intermediate-floor steel column 44 can be connected and fixed in the following manner: the intermediate-floor steel column 44 includes a second column body 441 and a third connecting column 442 prefabricated at the bottom end of the second column body 441 and coaxial with the second column body 441. The wall thickness of the third connecting column 442 is greater than the wall thickness of the second column body 441, and the third connecting column 442 has a plurality of sixth fixing holes; the first-floor steel column 42 and the third connecting column 442 have the same cross-sectional shape, and the radial dimension of the inner wall of the first-floor steel column 42 is adapted to the radial dimension of the outer wall of the third connecting column 442. The first-layer steel column 42 has several seventh fixing holes at its top, corresponding to the sixth fixing hole; multiple second connecting plates 443 are provided, each second connecting plate 443 having several eighth fixing holes corresponding to the seventh fixing holes; a third connecting column 442 is inserted into the top of the first-layer steel column 42 (e.g., the second connecting column 423), and the second connecting plate 443 is located on the outer surface of the first-layer steel column 42 (the sixth, seventh, and eighth fixing holes are located on the same axis). Multiple fasteners passing through the eighth, seventh, and sixth fixing holes sequentially are used to lock and fix the second connecting plate 443, the first-layer steel column 42, and the third connecting column 442. Similarly, the above fasteners can be single-sided bolts or single-sided rivets for easy tightening.

[0050] Of course, in practical applications, other existing connection structures can also be used for the connection between beams and columns, and between columns.

[0051] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A construction process for a prefabricated steel frame house, characterized in that, Includes the following steps: (a) After the foundation and ground floor are constructed, several first-floor steel columns are installed at predetermined positions on the foundation, which includes an exterior wall foundation and an interior wall foundation. Embedded components are provided in the foundation; these embedded components are square steel embedded components, with their tops protruding from the foundation. Each first-floor steel column includes a first column body and a first connecting column prefabricated at the bottom end of the first column body and coaxial with it. The first connecting column has several first fixing holes. The top of the square steel embedded component has the same cross-sectional shape as the first connecting column. The radial dimension of the inner wall of the square steel embedded part is adapted to the radial dimension of the outer wall of the first connecting column. The top of the square steel embedded part has several second fixing holes corresponding to the first fixing hole. The first connecting column is inserted into the top of the square steel embedded part, and the square steel embedded part and the first connecting column are locked together by multiple fasteners and a first connecting plate provided on the outer surface of the square steel embedded part. The fasteners pass through the first fixing hole, the second fixing hole, and the third fixing hole on the first connecting plate. The fasteners are single-sided bolts or single-sided rivets. (b) Multiple first-layer EPS cavity modules are arranged and stacked on the outer wall foundation, and filling material is filled into the cavity of the first-layer EPS cavity module. Each first-layer steel column installed on the outer wall foundation passes through the cavity of the first-layer EPS cavity module stacked at a predetermined position on the foundation. (c) After the first-floor EPS cavity modules are stacked to the floor level and filled with filling material, the first-floor steel beams are used to connect the first-floor steel columns. The first-floor steel beams located between the two first-floor steel columns inserted into the first-floor EPS cavity modules are embedded into the cavity of the top-level first-floor EPS cavity modules. The filling material is thermal insulation mortar or environmentally friendly mortar. The first-floor steel beams are H-beams, and each beam includes a beam body and a beam end plate prefabricated at the end of the beam body. The beam body is perpendicular to the beam end plate, and the beam end plate has multiple fourth fixing holes. The first-floor steel columns are square steel tubes. The first-layer steel column includes a second connecting column prefabricated at the top of the first column body and coaxial with the first column body, and the wall thickness of the second connecting column is greater than the wall thickness of the first column body; at least one side wall of the second connecting column has a plurality of fifth fixing holes, the height of the second connecting column is greater than the height of the beam end plate, and the width of the side wall of the second connecting column with the fifth fixing holes is greater than the width of the beam end plate; the first-layer steel beam and the first-layer steel column are fixed together by attaching the beam end plate to the side wall of the second connecting column with the fifth fixing holes and locking them together by fasteners passing through the fourth fixing holes and the fifth fixing holes; (d) Construct a floor slab or roof over the first-floor steel beams.

2. The construction process of the prefabricated steel frame house according to claim 1, characterized in that, The construction process also includes: (e) Install intermediate layer steel columns at a predetermined position on the floor slab, with the bottom of each intermediate layer steel column connected and fixed to a first layer steel column. (f) Multiple intermediate layer EPS cavity modules are arranged and stacked on the floor above the first layer EPS cavity module, and filling material is filled into the cavity of the intermediate layer EPS cavity module. Each intermediate layer steel column connected to the first layer steel column passing through the first layer EPS cavity module passes through the cavity of the intermediate layer EPS cavity module stacked on the floor. (g) After the intermediate layer EPS cavity module is stacked at the floor level and filled with filling material, the intermediate layer steel beam is used to connect the intermediate layer steel column, and the intermediate layer steel beam located between the two intermediate layer steel columns inserted into the intermediate layer EPS cavity module is embedded in the cavity of the intermediate layer EPS cavity module located at the top. (h) Construct a floor slab or roof over the intermediate steel beams.

3. The construction process for prefabricated steel frame houses according to claim 1 or 2, characterized in that, The height of the first-floor EPS cavity module is less than the floor elevation, and step (b) includes: (b1) Multiple first-layer EPS cavity modules are stacked on the outer wall foundation to form a single EPS cavity module layer, and steel wire mesh and filling material are placed in the cavity of the single EPS cavity module layer. (b2) Multiple first-layer EPS cavity modules are stacked on top of the single EPS cavity module layer to form another single EPS cavity module layer, and steel wire mesh and filling material are placed in the cavity of the single EPS cavity module layer until the single EPS cavity module layer reaches the floor level.

4. The construction process for prefabricated steel frame houses according to claim 1 or 2, characterized in that, The height of the first-floor EPS cavity module is less than the floor elevation, and step (b) includes: (b1') Multiple first-floor EPS cavity modules are stacked sequentially from bottom to top on the outer wall foundation until the floor level is reached; (b2') Place a wire mesh and filler material inside the cavity of the EPS cavity module.

5. The construction process of the prefabricated steel frame house according to claim 1, characterized in that, The construction process also includes: after the first-floor EPS cavity modules are stacked at the floor level and filled with filling material, the inner wall is built on the inner wall foundation or prefabricated wall panels are installed to form the inner wall.

6. The construction process of the prefabricated steel frame house according to claim 1, characterized in that, In step (a), the first-floor steel columns are installed at each corner of the outer wall foundation, at each corner of the inner wall foundation, and at the intersection of the outer wall foundation and the inner wall foundation.

7. The construction process for prefabricated steel frame houses according to claim 6, characterized in that, The first-floor EPS cavity module includes: a T-shaped shear wall module, an L-shaped shear wall module, and a straight shear wall module. The T-shaped shear wall module and the L-shaped shear wall module each include column holes for the first-floor steel columns to pass through. In step (b), the L-shaped shear wall module is stacked at the corner of the outer wall foundation, and the T-shaped shear wall module is stacked at the intersection of the outer wall foundation and the inner wall foundation.

8. The construction process of the prefabricated steel frame house according to claim 1, characterized in that, Step (b) includes: using a first-floor window beam to connect the two first-floor steel columns on both sides of the window at the upper edge of the window, and using a first-floor door beam to connect the two first-floor steel columns on both sides of the doorway at the upper edge of the doorway.

9. The construction process for prefabricated steel frame houses according to claim 1, characterized in that, Each flange of the first-layer steel beam has an arc-shaped notch, and the ratio of the distance between the arc-shaped notch and the beam end plate to the width of the flange is 0.5-0.

75. The ratio of the dimension of the arc-shaped notch in the length direction of the beam body to the height of the beam body is 0.65-0.85.

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