A prefabricated box-type house structure and construction method thereof

Abstract

The present invention discloses an assembled box-type housing structure, including a standard floor unit, a top floor unit and a bottom floor unit, wherein the standard floor unit includes four vertically arranged standard floor unit square tube columns and a standard floor unit special assembled integrated floor cover, a standard floor unit or a top floor unit is installed on the top of the standard floor unit, the structure of the top floor unit is similar to that of the standard floor unit, the top floor unit includes four vertically arranged top floor unit square tube columns and a top floor unit special assembled integrated floor cover, a standard floor unit or a bottom floor unit is arranged at the bottom of the standard floor unit, a plurality of standard floor units are connected to each other, a plurality of other bottom floor units are arranged in the horizontal directions around the bottom floor unit, and a plurality of other top floor units are arranged in the horizontal directions around the top floor unit. The beneficial effects of the present invention are: providing a more modular and more flexible structural unit, enhancing the convenience of connecting the units in the vertical and horizontal directions, and improving the integrity of the assembled structure.

Description

Technical Field

[0001] The invention belongs to the technical field of box-type houses, and in particular relates to an assembled box-type house structure and a construction method thereof. Background Art

[0002] In the context of the country's vigorous promotion of the development of prefabricated buildings, prefabricated container houses have good prospects as a green building that is efficient, energy-saving, environmentally friendly, and in line with the principle of sustainable development. However, existing prefabricated container houses, whether traditional container houses or packing boxes, have problems such as discontinuous vertical components and weak node connection stiffness. The present invention proposes a structural system and construction method with the characteristics of "column penetration", which ensures the continuity of vertical components and node connection stiffness, while also having the characteristics of convenient packaging, transportation and installation of container houses. Summary of the invention

[0003] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0004] An assembled box-type house structure includes a standard floor unit, which includes four vertically arranged standard floor unit square tube columns, each of which is provided with a plurality of bolt holes at the upper, middle and lower relative positions of each standard floor unit square tube column, and the plurality of bolt holes on the standard floor unit square tube column penetrate the standard floor unit square tube column horizontally and vertically, and two positioning brackets are welded in the middle of the standard floor unit square tube column, and a standard floor unit "C" type beam is provided between every two standard floor unit square tube columns, and the standard floor unit square tube columns and the standard floor unit "C" type beam together form a rectangular frame structure, and the standard floor unit " The standard floor prefabricated integral floor slab is arranged on the C" beam. The standard floor unit "C" beam and the standard floor prefabricated integral floor slab are connected by bolts to form a special assembled integrated floor slab for the standard floor unit. The top floor unit is installed on the top of the standard floor unit. The structure of the top floor unit is similar to that of the standard floor unit. The top floor unit includes four vertically arranged top floor unit square tube columns. The upper and lower relative positions of each top floor unit square tube column are provided with multiple bolt holes. The multiple bolt holes on the top floor unit square tube column penetrate the top floor unit square tube column horizontally and vertically. Two positioning brackets are welded on the upper part of the top floor unit square tube column. Every two A top unit "C"-shaped beam is arranged between the square tube columns of the top unit. The structure of the top unit "C"-shaped beam is the same as that of the standard floor unit "C"-shaped beam. The top unit "C"-shaped beam is fixedly connected to the top of the square tube column of the top unit at a relative position. The square tube column of the top unit and the top unit "C"-shaped beam together form a rectangular frame structure. The top unit "C"-shaped beam is installed on the top of the top unit. The top unit "C"-shaped beam and the top unit prefabricated integral floor slab are connected to form a special assembled integrated floor slab for the top unit through bolts. The bottom of the standard floor unit is provided with a bottom unit. The bottom unit includes four The connection structure of the vertically arranged bottom unit square tube columns, the top unit square tube columns and the top unit "C"-shaped beams is the same as the connection structure of the standard floor unit "C"-shaped beams and the standard floor unit square tube columns. A plurality of other standard floor units are arranged horizontally around the standard floor unit, and the plurality of standard floor units are interconnected. A plurality of other bottom units are arranged horizontally around the bottom unit, and the plurality of bottom units are interconnected. A plurality of other top units are arranged horizontally around the top unit, and the plurality of top units are interconnected. The top unit square tube columns are fixedly connected to the corresponding standard floor unit square tube columns through inner sleeves, and the bottom unit and the standard floor unit are fixedly connected through corresponding inner sleeves.

[0005] Furthermore, the relative positions of the four corners of the prefabricated integral floor slab of the top unit are provided with notches for avoiding the square tube columns of the top unit, and the relative positions of the four corners of the prefabricated integral floor slab of the standard floor are provided with notches for avoiding the square tube columns of the standard floor units; the positions of the four square tube columns of the top unit, the four square tube columns of the standard floor unit and the four square tube columns of the bottom unit correspond respectively, and the position of the prefabricated integral floor slab of the top unit corresponds to the position of the prefabricated integral floor slab of the standard floor.

[0006] Furthermore, a bottom plate is provided at the bottom of the standard floor unit square tube column and the bottom floor unit square tube column, and a plurality of bolts are provided around the lower part of the bottom floor unit square tube column within a height range of about 3 times the column cross-section width, and a semi-long circular hole is provided at a relative position at the bottom of the front side, rear side, left side and right side of the bottom floor unit square tube column, and a plurality of anchor holes are provided on the bottom plate.

[0007] Furthermore, the connection structure between adjacent top-level units and the connection structure between adjacent standard floor units are the same; when the standard floor unit square tube columns inside two adjacent standard floor units are fixedly connected, a straight-line filling plate is provided between the standard floor unit square tube columns, when the standard floor unit square tube columns inside three adjacent standard floor units are fixedly connected, an "L"-shaped filling plate is provided between the standard floor unit square tube columns, and when the standard floor unit square tube columns inside four adjacent standard floor units are fixedly connected, a cross-shaped filling plate is provided between the standard floor unit square tube columns.

[0008] Furthermore, end plates are provided at both ends of the standard floor unit "C"-shaped beam, the size of the end plates is larger than the cross-sectional size of the standard floor unit "C"-shaped beam, and stiffening plates are provided on the end plates for strengthening the strength of the end plates, and the lower part of the end plates is in contact with the positioning support.

[0009] The above-mentioned construction method of the assembled box-type house structure is characterized by comprising the following steps:

[0010] S1. Install the bottom unit on the foundation, and connect and fix the half-story-high square tube columns of the bottom unit to the embedded parts in the foundation through the column foot;

[0011] S2. Install the standard floor unit square tube column in the standard floor unit. First, install the inner sleeve in the lower floor square tube column, ensure that the corresponding through bolt holes of the sleeve and the square tube column are aligned, install the through bolts located at the lower floor square tube column, fix the sleeve in place, and then install the upper floor square tube column, ensure that the sleeve is aligned with the corresponding through bolt holes located at the upper floor square tube column, and ensure the verticality of the upper and lower tube columns in the vertical direction, install the through bolts located at the upper floor square tube column, and complete the inner sleeve splicing of the square tube column;

[0012] S3. Install the standard floor unit-specific assembled integrated floor slab in the standard floor unit, hoist the standard floor unit-specific assembled integrated floor slab to the floor height position, so that the end plate positioning notch on the standard floor unit "C"-shaped beam is engaged with the positioning support protrusion in the middle of the standard floor unit square tube column; then the through bolts pass through the end plate, the standard floor unit square tube column and the corresponding filling plate to connect the corresponding standard floor unit "C"-shaped beam in the same direction;

[0013] S4. After the integral floor slab including the standard floor unit "C"-shaped beam and the standard floor prefabricated integral floor slab is fixed on site, the gaps between the boxes are filled with high-grade concrete;

[0014] S5, repeat the above steps to continue installing multiple standard floor units until the design height is met;

[0015] S6. Install the top unit, put the corresponding inner sleeve and the corresponding filling plate in place, install the square tube column of the top unit by through bolts, and complete the splicing of the square tube column; then hoist the top unit special assembly integrated floor slab, so that the end plate positioning notch on the top unit "C" beam is engaged with the positioning support protrusion in the middle of the square tube column of the top unit. Fix the top unit special assembly integrated floor slab to the square tube column of the top unit with through bolts, and finally fill the gaps between the boxes with high-grade concrete.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] In the present invention, the present invention adopts a "column-through" structure, which greatly improves the continuity of the components in the vertical direction and the integrity of the structure compared to the existing vertical corner component connection form, and can reduce the displacement of the structure under the action of lateral loads. The prefabricated integral floor slab used in the standard floor unit has the advantage of "one slab for two purposes", that is, the prefabricated integral floor slab is the bottom slab of the upper layer and the top slab of the lower layer. Compared with the traditional box-type house, it saves materials, reduces the overall deadweight of the structure, and reduces the cost. The splicing of the vertical components and the connection of the horizontal components are designed at different positions of the structure to avoid the occurrence of complex node conditions and the complex stress of the components due to the concentration of the connection position. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the present invention;

[0019] Figure 2 is a structural diagram of a standard floor unit;

[0020] Figure 3 This is an exploded view of a standard floor unit;

[0021] Figure 4 It is a schematic diagram of the structure of the top unit;

[0022] Figure 5 This is an exploded view of the top unit;

[0023] Figure 6 It is a structural diagram of the bottom unit;

[0024] Figure 7 It is a structural schematic diagram of the square tube columns of the ground floor unit;

[0025] Figure 8 It is a schematic diagram of the square tube column of the standard floor unit and the "C" beam of the standard floor unit;

[0026] Fig. 9 It is a schematic diagram of two standard floor unit square tube columns;

[0027] Fig.10 This is an exploded view of the square tube columns of two standard floor units;

[0028] Fig.11 It is a schematic diagram of the connection of three standard floor unit square tube columns;

[0029] Fig.12 This is an exploded view of the connection of three standard floor unit square tube columns;

[0030] Fig.13 It is a schematic diagram of the connection of four standard floor unit square tube columns;

[0031] Fig.14 This is an exploded view of the connection of four standard floor unit square tube columns;

[0032] Fig.15 It is a schematic diagram of the square tube columns of the standard floor unit and the square tube columns of the top floor unit;

[0033] Fig.16 It is a cross-sectional view of the square tube columns of the standard floor unit and the square tube columns of the top floor unit;

[0034] Fig.17 It is a cross-sectional view of two standard floor unit square tube columns and two top floor unit square tube columns;

[0035] Fig.18 It is a cross-sectional view of three standard floor unit square tube columns and three top floor unit square tube columns;

[0036] Fig.19 It is a cross-sectional view of the four standard floor unit square tube columns and the four top floor unit square tube columns.

[0037] In the figure: 1. standard floor unit, 2. square tube column of standard floor unit, 3. "C" type beam of standard floor unit, 4. prefabricated integral floor slab of standard floor, 5. top floor unit, 6. square tube column of top floor unit, 7. "C" type beam of top floor unit, 8. prefabricated integral floor slab of top floor unit, 9. inner sleeve, 10. bottom floor unit, 11. square tube column of bottom floor unit, 12. bottom plate, 13. anchor bolt hole, 14. semi-long circular hole, 15. stud, 16. end plate, 17. stiffening plate, 18. I-shaped filling plate, 19. "L" shaped filling plate, 20. cross filling plate. DETAILED DESCRIPTION

[0038] Example: Figures 1 to 19As shown, the standard floor unit 1 includes four vertically arranged standard floor unit square tube columns 2, each of which is provided with a plurality of bolt holes at the upper, middle and lower relative positions of each standard floor unit square tube column 2, and the plurality of bolt holes on the standard floor unit square tube column 2 penetrate the standard floor unit square tube column 2 horizontally and vertically, and two positioning brackets are welded in the middle of the standard floor unit square tube column 2, and a standard floor unit "C" type beam 3 is provided between every two standard floor unit square tube columns 2, and the standard floor unit square tube columns 2 and the standard floor unit "C" type beam 3 together form a rectangular frame structure, and the standard floor unit "C" type beam 3 is provided with a standard The standard floor unit prefabricated integral floor 4, the standard floor unit "C" type beam 3 and the standard floor prefabricated integral floor 4 are connected by bolts to form a standard floor unit dedicated assembly integrated floor cover, the top unit 5 is installed on the top of the standard floor unit 1, the structure of the top unit 5 is similar to the standard floor unit 1, the top unit 5 includes four vertically arranged top unit square tube columns 6, each top unit square tube column 6 is provided with a plurality of bolt holes at the upper and lower relative positions, the plurality of bolt holes on the top unit square tube column 6 penetrate the top unit square tube column 6 horizontally and vertically, the upper part of the top unit square tube column 6 is welded with two positioning brackets, and every two top unit square tube columns are provided with a plurality of bolt holes on the top unit square tube column 6. A top unit "C"-shaped beam 7 is provided between the columns 6. The structure of the top unit "C"-shaped beam 7 is the same as that of the standard floor unit "C"-shaped beam 3. The top unit "C"-shaped beam 7 is fixedly connected to the top of the top unit square tube column 6 at a relative position. The top unit square tube column 6 and the top unit "C"-shaped beam 7 together form a rectangular frame structure. A top unit prefabricated integral floor slab 8 is installed on the top of the top unit "C"-shaped beam 7. The top unit "C"-shaped beam 7 and the top unit prefabricated integral floor slab 8 are connected by bolts to form a special assembled integrated floor cover for the top unit. A bottom unit 10 is provided at the bottom of the standard floor unit 1. The bottom unit 10 includes four vertical The connection structure of the arranged bottom unit square tube column 11, the top unit square tube column 6 and the top unit "C"-shaped beam 7 is the same as the connection structure of the standard floor unit "C"-shaped beam 3 and the standard floor unit square tube column 2. The standard floor unit 1 is provided with multiple other standard floor units in the horizontal directions, and the multiple standard floor units are connected to each other. The bottom unit 10 is provided with multiple other bottom units in the horizontal directions, and the multiple bottom units are connected to each other. The top unit 5 is provided with multiple other top units in the horizontal directions, and the multiple top units are connected to each other. The top unit square tube column 6 is fixedly connected to the corresponding standard floor unit square tube column 2 by the inner sleeve 9, and the bottom unit 10 is fixedly connected to the standard floor unit 1 by the corresponding inner sleeve 9.

[0039] The relative positions of the four corners of the top-floor unit prefabricated integral floor 8 are provided with notches for avoiding the square tube columns 6 of the top-floor unit, and the relative positions of the four corners of the standard-floor prefabricated integral floor 4 are provided with notches for avoiding the square tube columns 2 of the standard-floor unit; the positions of the four top-floor unit square tube columns 6, the four standard-floor unit square tube columns 2 and the four bottom-floor unit square tube columns 11 correspond respectively, and the position of the top-floor unit prefabricated integral floor 8 corresponds to the position of the standard-floor prefabricated integral floor 4.

[0040] A bottom plate 12 is provided at the bottom of the standard floor unit square tube column 2 and the bottom floor unit square tube column 11. A plurality of bolts 15 are provided around the lower part of the bottom floor unit square tube column 11 within a height range of about 3 times the column cross-section width. A semi-long circular hole 14 is provided at a relative position at the bottom of the front side, rear side, left side and right side of the bottom floor unit square tube column 11, and a plurality of anchor holes 13 are provided on the bottom plate 12.

[0041] The connection structure between adjacent top-floor units 5 and the connection structure between adjacent standard-floor units 1 are the same; when the standard-floor unit square tube columns 2 inside two adjacent standard-floor units 1 are fixedly connected, a straight-line filling plate 18 is provided between the standard-floor unit square tube columns 2 and the standard-floor unit square tube columns 2; when the standard-floor unit square tube columns 2 inside three adjacent standard-floor units 1 are fixedly connected, an "L"-shaped filling plate 19 is provided between the standard-floor unit square tube columns 2 and the standard-floor unit square tube columns 2; when the standard-floor unit square tube columns 2 inside four adjacent standard-floor units 1 are fixedly connected, a cross-shaped filling plate 20 is provided between the standard-floor unit square tube columns 2 and the standard-floor unit square tube columns 2.

[0042] End plates 16 are provided at both ends of the standard floor unit "C"-shaped beam 3. The size of the end plate 16 is larger than the cross-sectional size of the standard floor unit "C"-shaped beam 3. The end plate 16 is provided with a stiffening plate 17 for strengthening the strength of the end plate 16, and the lower part of the end plate is in contact with the positioning support.

[0043] The above-mentioned construction method of the assembled box-type house structure is characterized by comprising the following steps:

[0044] S1, install the bottom unit 10 on the foundation, and connect and fix the half-story-high square tube column 11 of the bottom unit to the embedded parts in the foundation through the column foot;

[0045] S2, installing the standard floor unit square tube column 2 in the standard floor unit 1, first install the inner sleeve 9 in the lower square tube column, ensure that the corresponding through bolt holes of the sleeve and the square tube column are aligned, install the through bolts located at the lower square tube column, fix the sleeve in place, and then install the upper square tube column, ensure that the sleeve is aligned with the corresponding through bolt holes located at the upper square tube column, and ensure the verticality of the upper and lower tube columns in the vertical direction, install the through bolts located at the upper square tube column, and complete the inner sleeve splicing of the square tube column;

[0046] S3, install the standard floor unit special assembly integrated floor slab in the standard floor unit 1, hoist the standard floor unit special assembly integrated floor slab to the floor height position, so that the end plate positioning notch on the standard floor unit "C" type beam 3 is engaged with the positioning support protrusion in the middle of the standard floor unit square tube column 2; then the through bolts pass through the end plate 16, the standard floor unit square tube column 2 and the corresponding filling plate to connect the corresponding standard floor unit "C" type beam 3 in the same direction;

[0047] S4, after the integral floor including the standard floor unit "C"-shaped beam 3 and the standard floor prefabricated integral floor slab 4 is fixed on site, the gaps between the boxes are filled with high-grade concrete;

[0048] S5, repeat the above steps to continue installing multiple standard floor units 1 until the design height is met;

[0049] S6, install the top unit 5, put the corresponding inner sleeve and the corresponding filling plate in place, install the top unit square tube column 6 by through bolts, and complete the square tube column splicing; then hoist the top unit special assembly integrated floor slab, so that the end plate positioning notch on the top unit "C" beam 7 is engaged with the positioning support protrusion in the middle of the top unit square tube column 6. Fix the top unit special assembly integrated floor slab to the top unit square tube column 6 with through bolts, and finally fill the gaps between the boxes with high-grade concrete.

[0050] The square tube columns are spliced ​​at half the floor height, and the splicing method adopts the form of an inner sleeve. The sleeve is selected with a square cross-section, and its external dimensions are the same as the internal dimensions of the square tube column. The through bolt holes opened on the four faces of the sleeve should correspond to the bolt holes at the upper and lower ends of the spliced ​​square tube columns, and the sizes should be the same. At the splicing of the upper and lower square tube columns, through bolts in two perpendicular directions pass through the square tube columns and sleeves to connect the upper and lower tube columns. At the splicing of four, six, and eight square tube columns, a straight, angle, and cross-shaped filling plates are placed between the gaps of adjacent square tube columns, and through bolts in two perpendicular directions pass through the square tube columns, sleeves, and filling plates to connect the square tube columns at the splicing. Connection between C-beams: In the same floor plane, two box-type houses with adjacent long sides have C-beams on the short sides fixed to the two adjacent square tube columns through the same set of through bolts and filling plates. Similarly, for two box-type houses adjacent to each other on the short side, the C-shaped beams on the long side are fixed to two adjacent square tube columns through the same set of through bolts and filling plates. Multiple standard floor units 1 can be set on the same floor at the same level, and other standard floor units 1 can be installed on the upper and lower parts of each standard floor unit 1. Multiple standard floor units 1 are connected to each other, and corresponding inner sleeves 9 are provided when multiple standard floor units 1 are connected to each other.

Claims

1. An assembled box-type house structure, characterized in that: The invention comprises a standard floor unit (1), wherein the standard floor unit (1) comprises four standard floor unit square tube columns (2) arranged vertically, wherein a plurality of bolt holes are arranged at relative positions of the upper part, the middle part and the lower part of each standard floor unit square tube column (2), wherein the plurality of bolt holes on the standard floor unit square tube column (2) penetrate the standard floor unit square tube column (2) horizontally and vertically, wherein two positioning brackets are welded at the middle part of the standard floor unit square tube column (2), wherein a standard floor unit "C"-shaped beam (3) is arranged between every two standard floor unit square tube columns (2), wherein the standard floor unit square tube columns (2) and the standard floor unit "C"-shaped beam (3) together form a rectangular frame structure, wherein the standard floor unit "C"-shaped beam (3) is provided with A standard floor prefabricated integral floor slab (4), a standard floor unit "C"-shaped beam (3) and a standard floor prefabricated integral floor slab (4) are connected by bolts to form a standard floor unit dedicated assembly integrated floor slab, a top floor unit (5) is installed on the top of the standard floor unit (1), the top floor unit (5) comprises four vertically arranged top floor unit square tube columns (6), a plurality of bolt holes are arranged at the upper and lower relative positions of each top floor unit square tube column (6), the plurality of bolt holes on the top floor unit square tube column (6) penetrate the top floor unit square tube column (6) horizontally and vertically, two positioning brackets are welded to the upper part of the top floor unit square tube column (6), and a top floor unit is provided between every two top floor unit square tube columns (6). The structure of the top unit "C"-shaped beam (7) is the same as that of the standard floor unit "C"-shaped beam (3). The top unit "C"-shaped beam (7) is fixedly connected to the top of the top unit square tube column (6) at a relative position. The top unit square tube column (6) and the top unit "C"-shaped beam (7) together form a rectangular frame structure. The top unit "C"-shaped beam (7) is installed with a top unit prefabricated integral floor slab (8) on the top. The top unit "C"-shaped beam (7) and the top unit prefabricated integral floor slab (8) are connected by bolts to form a special assembled integrated floor slab for the top unit. The bottom of the standard floor unit (1) is provided with a bottom unit (10). The bottom unit (10) includes four vertically arranged The connection structure of the bottom unit square tube column (11), the top unit square tube column (6) and the top unit "C"-shaped beam (7) is the same as the connection structure of the standard unit "C"-shaped beam (3) and the standard unit square tube column (2); the standard unit (1) is provided with a plurality of other standard units in the horizontal direction, and the plurality of standard units are connected to each other; the bottom unit (10) is provided with a plurality of other bottom units in the horizontal direction, and the plurality of bottom units are connected to each other; the top unit (5) is provided with a plurality of other top units in the horizontal direction, and the plurality of top units are connected to each other; the top unit square tube column (6) is fixedly connected to the corresponding standard unit square tube column (2) via an inner sleeve (9); the bottom unit (10) is fixedly connected to the standard unit (1) via a corresponding inner sleeve (9); The relative positions of the four corners of the top unit prefabricated integral floor slab (8) are provided with notches for avoiding the top unit square tube columns (6), and the relative positions of the four corners of the standard floor prefabricated integral floor slab (4) are provided with notches for avoiding the standard floor unit square tube columns (2); the positions of the four top unit square tube columns (6), the four standard floor unit square tube columns (2), and the four bottom unit square tube columns (11) respectively correspond to each other, and the position of the top unit prefabricated integral floor slab (8) corresponds to the position of the standard floor prefabricated integral floor slab (4); A bottom plate (12) is provided at the bottom of the standard floor unit square tube column (2) and the bottom floor unit square tube column (11); a plurality of bolts (15) are provided around the bottom of the bottom floor unit square tube column (11) within a height range of three times the column cross-section width; a semi-long circular hole (14) is provided at a relative position at the bottom of the front side, rear side, left side, and right side of the bottom floor unit square tube column (11); and a plurality of anchor bolt holes (13) are provided on the bottom plate (12).

2. The assembled box-type house structure according to claim 1 is characterized in that: The connection structure between adjacent top-floor units (5) and the connection structure between adjacent standard-floor units (1) are the same; when the standard-floor unit square tube columns (2) inside two adjacent standard-floor units (1) are fixedly connected, a straight-line filling plate (18) is provided between the standard-floor unit square tube columns (2) and the standard-floor unit square tube columns (2); when the standard-floor unit square tube columns (2) inside three adjacent standard-floor units (1) are fixedly connected, an "L"-shaped filling plate (19) is provided between the standard-floor unit square tube columns (2) and the standard-floor unit square tube columns (2); and when the standard-floor unit square tube columns (2) inside four adjacent standard-floor units (1) are fixedly connected, a cross-shaped filling plate (20) is provided between the standard-floor unit square tube columns (2) and the standard-floor unit square tube columns (2).

3. The assembled box-type house structure according to claim 1 is characterized in that: End plates (16) are provided at both ends of the standard floor unit "C"-shaped beam (3); the size of the end plates (16) is larger than the cross-sectional size of the standard floor unit "C"-shaped beam (3); a stiffening plate (17) for reinforcing the strength of the end plates (16) is provided on the end plates (16); and the lower portion of the end plates is in contact with a positioning support.

4. A construction method for a prefabricated box-type house structure according to any one of claims 1 to 3, characterized in that The following steps are involved: S1, installing the bottom unit (10) on the foundation, and connecting and fixing the half-story-high square tube columns (11) of the bottom unit to the embedded parts in the foundation through the column foot; S2, installing the standard floor unit square tube column (2) in the standard floor unit (1), first installing the inner sleeve (9) in the lower square tube column, ensuring that the corresponding through bolt holes of the sleeve and the square tube column are aligned, installing the through bolts located on the lower square tube column, fixing the sleeve in place, and then installing the upper square tube column, ensuring that the sleeve is aligned with the corresponding through bolt holes located on the upper square tube column, and ensuring the verticality of the upper and lower square tube columns in the vertical direction, installing the through bolts located on the upper square tube column, and completing the inner sleeve splicing of the square tube column; S3, installing the standard floor unit-specific assembled integrated floor slab in the standard floor unit (1), hoisting the standard floor unit-specific assembled integrated floor slab to the floor height position, so that the end plate positioning notch on the standard floor unit "C"-shaped beam (3) is engaged with the positioning support protrusion in the middle of the standard floor unit square tube column (2); then, through-bolts are passed through the end plate (16), the standard floor unit square tube column (2) and the corresponding filling plate to connect the corresponding standard floor unit "C"-shaped beam (3) in the same direction; S4, after the integral floor slab including the standard floor unit "C"-shaped beam (3) and the standard floor prefabricated integral floor slab (4) is fixed on site, the gaps between the boxes are filled with high-grade concrete; S5, repeat the above steps to continue installing multiple standard floor units (1) until the design height is met; S6. Install the top unit (5), place the corresponding inner sleeve and the corresponding filling plate in place, install the top unit square tube column (6) by through-bolting, and complete the square tube column splicing; then hoist the top unit special assembly integrated floor slab, so that the end plate positioning notch on the top unit "C"-shaped beam (7) is engaged with the positioning support protrusion in the middle of the top unit square tube column (6).

5. The construction method of a prefabricated box-type house structure according to claim 4 is characterized in that: The top unit special assembled integrated floor slab is fixed to the top unit square tube column (6) with through bolts, and finally the gaps between the boxes are filled with high-grade concrete.

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