CN105275089B - A kind of complete prefabricated cold formed steel house modular unit and assembly connection method - Google Patents

Abstract

The invention discloses a modular unit of a fully pre-cooled and formed steel house and an assembly and connection method, which includes assembling a special-shaped column unit, a wall unit and a connecting wall panel unit, the assembling and connection of the combined special-shaped column unit and the wall unit, the The connection between the spliced special-shaped column unit and the wall unit is assembled by connecting the wall panel unit. The invention has the advantages of simple and convenient construction operation, high degree of industrialization, less on-site construction, etc., can realize rapid and fully prefabricated construction of house structures, and is suitable for structural construction of cold-formed steel houses.

Description

A fully pre-cold-formed steel house modular unit and assembly connection method

technical field

The invention relates to an assembled building structure, in particular to a fully prefabricated assembled cold-formed steel house structure, which belongs to the technical field of civil engineering.

Background technique

At present, my country is in the stage of rapid urbanization and industrialization. The demand for natural resources is huge, which puts huge pressure on the natural environment. It is urgent to develop green and energy-saving building structures. This theme has been included in the key development areas of my country's medium and long-term development plans. In addition, with the improvement of my country's education level and living standards, the labor force structure has undergone major changes, and the cost of on-site construction workers is high. Prefabricated building structures can effectively reduce construction costs, reduce on-site construction volume, and greatly improve construction efficiency. The theme of environmental development. Therefore, vigorously developing prefabricated building structures with green environmental protection, convenient construction, and good performance meets the needs of my country's national conditions, and is of great significance to promoting my country's sustainable development, while accelerating the process of my country's construction industrialization.

Cold-formed steel house structure is also called cold-formed thin-walled steel house structure. It has the advantages of light weight, high material utilization rate, fast construction and installation speed, environmentally friendly and reusable materials, and good seismic performance. It has been widely used abroad. In my country In recent years, a large number of cold-formed steel houses have been built, but most of them are residential structures with less than 3 floors. In view of the superior performance of cold-formed steel houses and the needs of the owners for the use of houses, the structure of cold-formed steel houses has gradually changed from traditional residential structures to multi-functional housing structures including residence, office, exhibition, leisure and entertainment, and has also gradually changed from low-rise to multi-functional. layer development.

In the cold-formed steel house structure in the prior art, the cold-formed steel columns are generally arranged at equal intervals of 400mm or 600mm, and are connected with the cold-formed steel guide rails by self-tapping screws to form a skeleton, and then on both sides of the skeleton by self-tapping screws to a certain Install wallboards (gypsum boards, glass magnesium boards, OSB boards, etc.) at intervals, and also fill the cavity with thermal insulation materials. That is, the vertical load-bearing system of cold-formed steel houses in the prior art includes steps such as installation of cold-formed steel skeletons and installation of wall panels. The installation requires manpower. During the construction process, each wall involves the installation of hundreds of screws, and the construction process is too cumbersome. In the prior art, most of the side columns are cold-formed steel composite components, or composite rectangular steel pipe columns are used and poured into concrete or cement mortar. When the number of floors of the building is high and the span is large, cold-formed steel composite components alone cannot meet the bearing capacity requirements. For split rectangular steel pipe columns, when installing multi-directional walls, it is necessary to add C-shaped or U-shaped members on the side of the steel pipe column. However, this method not only weakens the steel pipe column to a large extent, but the inconsistency between the addition of components and the deformation of the steel pipe column will lead to uneven distribution of loads, and some walls lack concrete constraints on the screws, resulting in weakened bearing capacity. Complicated and other disadvantages. In addition, rectangular steel pipe columns generally use on-site grouting, and wet work will also weaken the wall panels, and the construction process is cumbersome and complicated, which greatly slows down the construction progress of the wall structure. In order to solve the above problems, it has become a technical problem to be solved urgently to design a modular unit of a fully pre-cold formed steel house and an assembly connection method. Combining special-shaped column units can meet the layout of structural multi-directional walls under the premise of ensuring structural performance. Combining special-shaped column units and wall units for factory prefabrication can simplify the on-site construction process. Each unit can be modularized and mass-produced to achieve cold forming The demand for full prefabricated assembly of steel house structures.

Contents of the invention

Purpose of the invention: In order to overcome the deficiencies in the prior art, the present invention provides a modular unit of a fully pre-cooled formed steel house and an assembly and connection method, which has the advantages of simple construction and operation, a high degree of industrialization, and less on-site construction. The fast and fully prefabricated construction of the house structure is suitable for the structural construction of cold-formed steel houses.

Technical scheme: in order to achieve the above object, the technical scheme adopted in the present invention is:

A modular unit of a fully pre-cold formed steel house, comprising a combined special-shaped column unit, a wall unit and a connecting wall panel unit, the combined special-shaped column unit and the wall unit are assembled and connected, and the combined special-shaped column unit and the wall unit The joints are assembled by connecting wall panel units.

Further, the combined special-shaped column unit includes a combined special-shaped central column unit, a combined special-shaped side column unit and a combined special-shaped corner column unit, and the combined special-shaped central column unit, combined special-shaped side column unit and combined special-shaped corner column unit pass Prefabricated connection of wall units.

Further, the combined special-shaped central column unit includes two first U-shaped cross-sectional members oppositely arranged, two first hat-shaped cross-sectional members oppositely arranged, central pillar connecting guide rails, first central pillars and several wall panels, so The first U-shaped cross-section member and the first hat-shaped cross-section member are connected in pairs to form a cross-sectional sealing structure to form a split special-shaped central column skeleton, and fillers are poured into the split special-shaped central pillar skeleton, and the bottom of the split special-shaped central pillar skeleton Two mutually perpendicular center column connecting guide rails are arranged staggeredly, and the end of each center column connecting guide rail is respectively provided with a first center column perpendicular to the center column connecting guide rails to form the skeleton of the combined special-shaped center column unit. The frame of the column unit is connected by several wall panels to form the frame of the special-shaped central column, the connecting guide rail of the central column and the first central column to form a combined special-shaped central column unit.

Further, the split special-shaped side column unit includes a first C-shaped cross-section member and a second hat-shaped cross-section member oppositely arranged, a side post connecting guide rail, a second central column and several wall panels, and the C-shaped cross-section member 11 and The second hat-shaped cross-section members are connected to form a cross-section sealing structure to form a split special-shaped side column skeleton, filling is poured into the split special-shaped side column skeleton, and two mutually perpendicular side columns are arranged staggeredly at the bottom of the split special-shaped side column skeleton Guide rails, the end of each side column connecting guide rail is respectively provided with a second central column perpendicular to the side column connecting guide rail to form a unit skeleton of a combined special-shaped side column, and the unit skeleton of the combined special-shaped side column is connected by several wall panels The frame of the side column, the connecting guide rail of the side column and the second central column form a combined special-shaped side column unit.

Further, the combined special-shaped corner column unit includes a second C-shaped section member, an angle steel section member, a corner column connecting guide rail, a third central column and several wall panels, and the second C-shaped section member is cold-formed along the neutral axis of the web 90° forms a rectangular structure with a concave corner section. The corner depressions of the rectangular structure are connected with angle steel section members to form a combined special-shaped corner column skeleton. Fillers are poured into the combined special-shaped corner column skeleton, and the combined special-shaped corner column Two mutually perpendicular corner post connecting guide rails are arranged staggeredly at the bottom of the skeleton, and the end of each corner post connecting guide rail is respectively provided with a third central column perpendicular to the corner post connecting guide rails to form a combined special-shaped corner post unit skeleton, and the combined special-shaped corner post unit skeleton A combined special-shaped corner column unit is formed by connecting and assembling the frame of the special-shaped corner column, the column connecting guide rail and the third central column through a plurality of wall panels.

The filler is concrete or cement mortar to ensure the connection performance between components.

Further, the wall unit includes a connecting guide rail, a fourth central column and a wall panel, the fourth central column and the connecting guide rail are vertically arranged to form a wall unit skeleton, and the wall panels are arranged on both sides of the wall unit skeleton .

Further, the first U-shaped section member, the first hat-shaped section member, the first C-shaped section member, the second hat-shaped section member, the second C-shaped section member and the fourth center column are provided with lifting stiffeners .

Further, the first U-shaped cross-sectional member, the first hat-shaped cross-sectional member, the first C-shaped cross-sectional member, the second hat-shaped cross-sectional member and the second C-shaped cross-sectional member are provided with lifting stiffeners. The specific location of hoisting stiffeners can be selected according to the layout of hydropower pipelines and the needs of on-site hoisting.

Further, several reserved holes are provided on the webs of the central column connecting guide rail, the side column connecting guide rail and the corner post connecting guide rail. Water and electricity pipelines can be erected in the reserved holes, and passages can be provided for hoisting ropes of each assembled special-shaped column unit and wall unit.

Further, there is a reserved hole for the center column connecting guide rail at the overlapping position of the central column connecting guide rail and the spliced special-shaped central column skeleton; The connecting guide rail is provided with a reserved hole for the side post connecting guide rail; the corner post connecting guide rail where the corner post connecting guide rail overlaps with the spliced special-shaped corner post skeleton is provided with a reserved hole for the corner post connecting guide rail. The reserved holes for connecting the guide rails of the central column, the reserved holes for the connecting guide rails of the side columns and the reserved holes for the connecting guide rails of the corner columns ensure that the spliced special-shaped column units are vertically connected.

A method for assembling and connecting modular units of fully pre-cold-formed steel houses, the steps are as follows:

Step 1: Factory prefabricate each assembled special-shaped column unit and wall unit, hoist it to the designated position of the house structure, and position and connect;

Step 2: Connect the assembled special-shaped column units and wall units through guide rail connectors;

Step 3: Assembling the connection between the combined special-shaped column unit and the wall unit through connecting the wall panel unit.

Beneficial effect: the present invention has the following advantages:

(1) The cold-formed steel modular house structure of the present invention is divided into four parts: a combined special-shaped column unit, a wall unit, a connecting wall panel unit and a connector. All units can be prefabricated in the factory and directly transported to the construction site. Heavy equipment is used to hoist each unit, reducing the workload of on-site construction, and the degree of industrialization is high. The size and modulus of each unit can be set for factory mass production.

(2) The cold-formed steel modular house structure of the present invention can realize fully assembled construction, and the construction process of connecting each unit is simple, and the walls used by each unit can be cut and installed in the factory, which greatly simplifies the existing construction process. Carry out the positioning of each unit and the connection construction of a small number of local self-tapping screws. There is no wet operation during the construction process, and all units are prefabricated and installed in the factory to ensure the compactness of the concrete or cement mortar in the split special-shaped steel pipe column, and also to ensure the connection performance between components.

(3) The spliced special-shaped column unit used in the present invention can be spliced by cold-formed steel basic components, and is easy to install. According to the construction and use requirements of the house structure, different combinations can be set up to form a flattened special-shaped central column, side column and corner column. Both sides of each direction can be covered with wall panels by self-tapping screws, and concrete can be poured into the steel pipe. or cement mortar. The poured concrete or cement mortar can effectively restrain the self-tapping screws, improve the connection performance of the self-tapping screws, improve the compressive and flexural bearing capacity of the split steel pipe column, and have good cooperating ability with the wall, and the construction is convenient.

In addition to the above-mentioned technical problems solved by the present invention, the technical features constituting the technical solutions, and the advantages brought by the technical features of these technical solutions, the fully prefabricated cold-formed steel house modular unit and construction connection of the present invention Other technical problems that can be solved by the method, other technical features contained in the technical solution, and the advantages brought by these technical features will be further described in detail with reference to the accompanying drawings.

Description of drawings

Fig. 1 is the on-site assembly schematic diagram of the fully prefabricated assembled cold-formed steel house structure part of the present invention;

Fig. 2 is a schematic plan view of the on-site assembly and connection of the fully prefabricated cold-formed steel house modular unit in the house structure of the present invention;

Fig. 3 is a schematic diagram of the central column unit of cold-formed steel spliced special-shaped steel pipes in Fig. 2;

Fig. 4 is a schematic diagram of the cold-formed steel split special-shaped steel pipe side column unit in Fig. 2;

Fig. 5 is a schematic diagram of the cold-formed steel joint special-shaped steel pipe corner column unit in Fig. 2;

Fig. 6 is a schematic diagram of the cold-formed steel wall unit in Fig. 2;

Fig. 7 is a sectional view at 1-1 in Fig. 3 and a schematic diagram of its factory assembly process;

Fig. 8 is a sectional view at 2-2 in Fig. 4 and a schematic diagram of its factory assembly process;

Fig. 9 is a sectional view at 3-3 in Fig. 5 and a schematic diagram of its factory assembly process;

Fig. 10 is a schematic diagram of the cold-formed steel cap-shaped section member used in Fig. 7 and Fig. 8;

Fig. 11 is a schematic diagram of the cold-formed steel C-section member used in Fig. 8;

Fig. 12 is a schematic diagram of the cold-formed steel U-shaped section member used in Fig. 7;

Fig. 13 is a schematic diagram of a C-shaped section member used in the cold bending treatment of the corner column in Fig. 9;

Fig. 14 is a schematic diagram of the cold-formed steel C-section member used in Fig. 6;

Fig. 15 is a schematic diagram of the connecting guide rail of the center column shown in Fig. 3;

Fig. 16 is a schematic diagram of the side column column connecting guide rail shown in Fig. 4;

Fig. 17 is a schematic diagram of the corner post connecting guide rail shown in Fig. 5 .

detailed description

The present invention will be further described below in conjunction with the accompanying drawings.

As shown in Figure 1-17, it is a modular unit of a fully pre-cold-formed steel house, including a combined special-shaped column unit, a wall unit 4 and a connecting wall panel unit 5, and the combined special-shaped column unit and the wall unit 4 are assembled and connected , the connection between the spliced special-shaped column unit and the wall unit 4 is assembled through the connecting wall panel unit 5 .

Wherein, the combined special-shaped column unit includes a combined special-shaped central column unit 1, a combined special-shaped side column unit 2 and a combined special-shaped corner column unit 3, and the combined special-shaped central column unit 1, combined special-shaped side column unit 2 and combined special-shaped corner column unit 3 The wall units 4 are assembled between the two. In order to ensure the safety of each split special-shaped column unit during transportation and hoisting, the width of the overhanging wall in each direction should not be too large, and should not be greater than 600mm.

The structural design in the present invention of the special-shaped middle column unit 1, the special-shaped side column unit 2, the special-shaped corner column unit 3 and the wall unit 4 is specifically described below.

The combined special-shaped central column unit 1 includes two opposite first U-shaped cross-section members 13, two opposite first hat-shaped cross-sectional members 12, central pillar connecting guide rails 16, first central pillar 61 and several wall panels 7. The first U-shaped cross-section member 13 and the first hat-shaped cross-section member 12 are connected in pairs to form a cross-sectional sealing structure to form a split special-shaped center column skeleton, and the filler 8 is poured into the split special-shaped center pillar skeleton, and the The filler 8 is concrete or cement mortar. Two mutually perpendicular center column connecting guide rails 16 are arranged staggeredly at the bottom of the split special-shaped center column skeleton, and the ends of each center column connecting guide rail 16 are respectively provided with the center column connecting guide rails. 16 vertical first center pillars 61 to form the unit skeleton of the spliced special-shaped center pillar, and the skeleton of the spliced special-shaped center pillar is connected by several wall panels 7 to join together the frame of the special-shaped center pillar, the center pillar connecting guide rail 16 and the first center pillar 61 to form a spliced Shaped central column unit 1.

The combined special-shaped side column unit 2 includes a first C-shaped section member 11 and a second hat-shaped section member 121 oppositely arranged, side column connecting guide rails 17, a second central column 62 and several wall panels 7. The C-shaped section The member 11 is connected with the second hat-shaped cross-section member 121 to form a cross-section sealing structure to form a split special-shaped side column skeleton, and the filler 8 is poured into the split special-shaped side column skeleton, and the filler 8 is concrete or cement mortar. The bottom of the combined special-shaped side column skeleton is staggered with two side column connecting guide rails 17 perpendicular to each other, and the end of each side column connecting guide rail 17 is respectively provided with a second neutral column 62 perpendicular to the side column connecting guide rail 17 to form a split The skeleton of the special-shaped side column unit, the skeleton of the combined special-shaped side column unit is formed by connecting the skeleton of the special-shaped side column by several wall panels 7, the side column connecting guide rail 17 and the second central column 62 to form the combined special-shaped side column unit 2.

The combined special-shaped corner column unit 3 includes a second C-shaped section member 10, an angle steel section member 14, a corner column connecting guide rail 18, a third central column 63 and several wall panels 7, and the second C-shaped section member 10 is arranged along the center of the web. The sexual axis is cold-bent to 90° to form a rectangular structure whose cross-section is a concave corner. The corner depression of the rectangular structure is connected with the angle steel section member 14 to form a joint special-shaped corner column skeleton, and the filler 8 is poured into the joint special-shaped corner column skeleton. , the filler is concrete or cement mortar, two mutually perpendicular corner post connecting guide rails 18 are interlaced at the bottom of the combined special-shaped corner post skeleton, and the ends of each corner post connecting guide rail 18 are respectively arranged perpendicular to the corner post connecting guide rails 18 The third center column 63 forms a joint special-shaped corner column unit skeleton, and the special-shaped corner column unit skeleton is connected by some wallboards 7 to form a joint special-shaped corner column skeleton, column connecting guide rail 18 and the third center column 63 to form a joint special-shaped corner column unit 3.

The strength label of the above-mentioned poured concrete is not lower than C25, and the strength label of the poured cement mortar is not lower than M10, and in order to ensure the operability of poured concrete or cement mortar, the first U-shaped cross-section member 13, the first cap The section heights of the shape-shaped section member 12 , the first C-shaped section member 11 , the second hat-shaped section member 121 and the second C-shaped section member 10 are not less than 50 mm.

The wall unit 4 includes a connecting guide rail 19, a fourth central column 64 and a wall panel 7, the fourth central column 64 is vertically arranged with the connecting guide rail 19 to form a wall unit skeleton, and the wall panel 7 is arranged on the wall unit sides of the skeleton. The wall unit 4 is divided into segments with a certain interval by the fourth central column 64, and the interval width of each segment adopts a fixed modulus of 400 mm or 600 mm. In order to ensure the safety of the wall unit 4 during transportation and hoisting, the wall unit 4 should not be too wide. The number of segments of each wall unit 4 is generally 2-8, and the width modulus and the number of segments are adapted to the housing. Structures vary in span and bay requirements.

The first U-shaped section member 13 , the first hat-shaped section member 12 , the first C-shaped section member 11 , the second hat-shaped section member 121 and the second C-shaped section member 10 are provided with lifting stiffeners 20 . A hoisting stiffener 20 is set at the top web position of the first U-shaped section member 13, the first hat-shaped section member 12 and the first C-shaped section member 11 used to form the split special-shaped column unit, for cooling of the corner column One hoisting stiffener 20 is arranged on both sides of the flange of the second C-shaped cross-section member 10 that is bent, and one hoisting stiffener 20 is arranged at the web of the C-shaped fourth central column 64 in part 4 of the wall unit. The specific position can be determined according to Water and electricity pipeline layout and on-site hoisting need to be selected. The hoisting stiffener 20 has a length of 100mm-300mm and is connected with the component through self-tapping screws. The setting position is 200mm-500mm away from the top of each split special-shaped column unit. Set up a hoisting reserved hole 21 at the web of the hoisting stiffener, the radius of the reserved hole is 10mm-50mm, and passivate the hole to provide support for the hoisting rope.

Several reserved holes 22 are arranged on the webs of the central column connecting guide rail 16 , the side column connecting guide rail 17 and the corner post connecting guide rail 18 . The reserved holes 22 can be used for erecting water and electricity pipelines, and can provide passages for hoisting ropes for assembling the special-shaped column unit and the wall unit 4 . A hole 22 with a radius of 10mm-100mm is reserved, and the opening of the hole is passivated.

The connecting guide rail 16 of the central column, the connecting guide rail 17 of the side column, and the connecting guide rail 18 of the corner column all adopt U-shaped cross-sectional members. All connecting rails have the same section size. The central column connecting guide rail 16 at the overlapping place of the central column connecting guide rail 16 and the spliced special-shaped central column framework is provided with a reserved hole 23 for the central column connecting guide rail; The column connecting guide rail 17 is provided with a reserved hole 24 for the side column connecting guide rail; the corner post connecting guide rail 18 where the corner post connecting guide rail 18 overlaps with the spliced special-shaped corner post skeleton is provided with a reserved hole 25 for the corner post connecting guide rail. This design ensures that the combined special-shaped column unit runs through vertically, and at the junction of the flanges, the flange of one of the U-shaped section members is bent at right angles, and connected to the other U-shaped section member by self-tapping screws. The length of right-angle bending is not less than 50mm, and at least two self-tapping screws are used for connection.

A method for assembling and connecting modular units of fully pre-cold-formed steel houses, the steps are as follows:

Step 1: Factory prefabricate each assembled special-shaped column unit and wall unit 4, hoist it to the designated position of the house structure, and locate and connect; specifically, all assembled special-shaped column units and wall units 4 are prefabricated in the factory and transported to the site , to locate the placement position of each unit of the house, use a small lifting machine (0.5t-1t) to hoist each unit to the designated position on site, and complete the vertical connection between the upper and lower floors.

Step 2: Connect each assembled special-shaped column unit and wall unit 4 through guide rail connectors 9 to form a house structure; specifically, place guide rail connectors 9 on the connection guide rails of each assembled special-shaped column unit and each wall The end of the connecting guide rail of the body unit 4 is connected to the lengthened position, and the webs of the guide rail connectors 9 are respectively closely attached to the connecting guide rails of the joint special-shaped column units and the webs of the connecting guide rails of the wall unit 4. At the same time, self-tapping screws are used to fix the Each spliced special-shaped column unit is connected with the wall unit 4, and the self-tapping screws are not less than 4 on each side, and the distance between them is 100mm-600mm. The screw spacing between each wall panel 7 and the joint special-shaped column unit is not less than 300mm, and the screw spacing at the site construction site is not less than 300mm. The guide rail connectors 9 are all U-shaped cross-section members, and their cross-sectional height is 2mm smaller than the connecting guide rails of the combined special-shaped column units and the connecting guide rails of the wall unit 4, and the guide rail connectors 9 are 200mm-500mm long.

The third step: connecting the joint of the combined special-shaped column unit and the wall unit 4 through the connecting wall panel unit 5 in an assembled manner. The connecting wall panel unit 5 is cut in the factory, transported to the site and connected to the splicing part of each spliced special-shaped column unit and the wall unit 4 by self-tapping screws.

As a preference, the thickness of the wallboard 7 is 3mm-15mm gypsum board or glass magnesium board, and single-layer or double-layer wallboard can be selected according to the use requirements of the house. The wall boards connecting the wall unit 4 are selected in accordance with the wall boards of the assembled special-shaped column units and the wall unit 4 to ensure the smoothness of the wall surface. The cavities of each combined special-shaped column unit, wall unit 4 and connecting wall unit 5 can be filled with prefabricated thermal insulation material, preferably lightweight foamed cement.

The above is only a preferred embodiment of the present invention, it should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, some improvements and modifications can also be made, and these improvements and modifications are also possible. It should be regarded as the protection scope of the present invention.

Claims (7)

1. A full pre-cold formed steel house modular unit is characterized in that: it comprises a special-shaped column unit, a wall unit (4) and a connecting wall panel unit (5), and the special-shaped column unit and the wall unit ( 4) Assembled connection, the connection between the combined special-shaped column unit and the wall unit (4) is assembled and connected by connecting the wall panel unit (5); The combined special-shaped column unit includes a combined special-shaped central column unit (1), a combined special-shaped side column unit (2) and a combined special-shaped corner column unit (3), and the combined special-shaped central column unit (1), combined special-shaped side column unit ( 2) and the combined special-shaped corner column units (3) are assembled and connected through the wall unit (4); The combined special-shaped central column unit (1) includes two first U-shaped cross-section members (13), two oppositely disposed first hat-shaped cross-sectional members (12), central pillar connecting guide rails (16), a second A central column (61) and several wall panels (7), the first U-shaped cross-sectional member (13) and the first hat-shaped cross-sectional member (12) are connected in pairs to form a cross-sectional sealing structure, forming a joint special-shaped central pillar skeleton, Filler (8) is poured into the spliced special-shaped central column framework, and two mutually perpendicular central column connecting guide rails (16) are arranged staggeredly at the bottom of the combined special-shaped central column framework, and the end of each central column connecting guide rail (16) The first central column (61) perpendicular to the connecting guide rail (16) of the central column is respectively arranged on the part to form the unit skeleton of the special-shaped central column, which is connected to the skeleton of the special-shaped central column by several wall panels (7) 1. The center column connecting guide rail (16) and the first center column (61) form a split special-shaped center column unit (1). 2. A modular unit of fully pre-cooled and formed steel houses according to claim 1, characterized in that: the combined special-shaped side column unit (2) includes a first C-shaped section member (11) and a second Hat-shaped section member (121), side column connecting guide rail (17), second center column (62) and some wallboards (7), described C-shaped section member 11 is connected with the second hat-shaped section member (121) to form The cross-sectional sealing structure forms a skeleton of a split special-shaped side column, filling (8) is poured into the skeleton of the split special-shaped side column, and two mutually perpendicular side column connecting guide rails (17) are arranged staggeredly at the bottom of the split special-shaped side column skeleton, The end of each side column connecting guide rail (17) is respectively provided with the second neutral column (62) perpendicular to the side column connecting guide rail (17), forming a joint special-shaped side column unit skeleton, and the described joint special-shaped side column unit skeleton passes through several The wallboard (7) connects and splits the special-shaped side column skeleton, the side column connecting guide rail (17) and the second center column (62) to form a split special-shaped side column unit (2). 3. A fully pre-cooled formed steel house modular unit according to claim 2, characterized in that: the split special-shaped corner column unit (3) includes a second C-shaped section member (10), an angle steel section member (14) , corner post connecting guide rail (18), third central post (63) and several wall panels (7), the second C-shaped section member (10) is cold-bent 90° along the web neutral axis to form a section that is a corner depression The rectangular structure, the corner depression of the rectangular structure is connected with the angle steel section member (14) to form a split special-shaped corner column skeleton, the filler (8) is poured into the split special-shaped corner post skeleton, and the bottom of the split special-shaped corner post skeleton Two mutually perpendicular corner post connecting guide rails (18) are arranged staggeredly, and the end of each corner post connecting guide rail (18) is respectively provided with a third central column (63) perpendicular to the corner post connecting guide rails (18), forming a unit skeleton of a spliced special-shaped corner post , the unit frame of the combined special-shaped corner column is connected with the frame of the combined special-shaped corner column, the column connecting guide rail (18) and the third central column (63) through several wallboards (7) to form the combined special-shaped corner column unit (3). 4. A fully pre-cooled formed steel house modular unit according to claim 3, characterized in that: the wall unit (4) includes a connecting guide rail (19), a fourth central column (64) and a wall panel ( 7), the fourth central column (64) and the connecting guide rail (19) are vertically arranged to form a wall unit skeleton, and the wall panels (7) are arranged on both sides of the wall unit skeleton. 5. A fully pre-cooled formed steel house modular unit according to claim 4, characterized in that: the first U-shaped section member (13), the first hat-shaped section member (12), the first C-shaped section member The sectional member (11), the second hat-shaped sectional member (121), the second C-shaped sectional member (10) and the fourth central column (64) are provided with lifting stiffeners (20). 6. A fully pre-cooled formed steel house modular unit according to claim 3, characterized in that: the webs of the center column connecting guide rails (16), side column connecting guide rails (17) and corner post connecting guide rails (18) Several reserved holes (22) are arranged on the board. 7. A fully pre-cooled and formed steel house modular unit according to claim 3, characterized in that: the central column connecting guide rail (16) overlaps with the central column connecting guide rail (16) at the overlapped special-shaped central column skeleton There is a reserved hole (23) for the center column connection guide rail; the side column connection guide rail (17) at the overlapping place of the side column connection guide rail (17) and the spliced special-shaped side column skeleton is provided with a side column connection guide rail reserved hole (24 ); the corner post connecting guide rail (18) at the overlapping place of the corner post connecting guide rail (18) and the spliced special-shaped corner post skeleton is provided with a corner post connecting guide rail reserved hole (25).