Modularized combined steel-concrete building unit and production method and installation method thereof

Abstract

The invention discloses a modular combined steel-concrete building unit which comprises a steel column, a top beam, a bottom beam and an L-shaped steel piece. The top beam and the bottom beam are connected to the top and the bottom of the steel column respectively to form a rectangular box type structure. The L-shaped steel pieces are fixed to the steel columns and located on the first outer vertical face and the second outer vertical face of the modular combined steel-concrete building unit, and the first outer vertical face and the second outer vertical face are two opposite vertical faces of the modular combined steel-concrete building unit. The postures of the L-shaped steel parts located on the first outer vertical face and the postures of the L-shaped steel parts located on the second outer vertical face are inverted, and through holes used for installing bolts are formed in the L-shaped steel parts. The L-shaped steel parts of the left side modular combined steel-concrete building unit are engaged with the inverted L-shaped steel parts of the right side modular combined steel-concrete building unit; the steel columns of the adjacent modular combined steel-concrete building units are connected together, and the bearing capacity of the whole building is improved.

Description

Technical Field

[0001] The invention relates to the field of construction, and in particular to a modular combined steel-concrete building unit and a production method and an installation method thereof. Background Art

[0002] Modular composite steel-concrete building units are an important part of new prefabricated buildings. Modular composite steel-concrete building units can efficiently complete various building main bodies and building accessories such as unit structure, decoration, water and electricity, equipment pipelines and bathroom facilities in the factory. At the construction site, only the building units need to be combined to complete the entire building, which can greatly shorten the construction period and reduce construction costs.

[0003] At present, when modular composite steel-concrete building units are assembled on site, the main focus is on the connection between the vertical boxes, and the horizontal boxes are only connected at the frame nodes. This results in limited force that can be transmitted between the horizontal boxes, restricting the development of prefabricated buildings. This is also one of the reasons why most prefabricated buildings are low-rise buildings. Summary of the invention

[0004] The technical problem to be solved by the present invention is that in the existing prefabricated buildings, the connection method between the horizontal boxes is relatively simple, which limits the development of prefabricated modular buildings towards high-rise buildings.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is: a modular composite steel-concrete building unit, including steel columns, top beams, bottom beams and L-shaped steel parts; The top beam and the bottom beam are respectively connected to the top and bottom of the steel column to form a rectangular box structure; The L-shaped steel member is fixed on the steel column and is located on the first facade and the second facade of the modular composite steel-concrete building unit. The first facade and the second facade are two opposite facades of the modular composite steel-concrete building unit. The L-shaped steel member on the first facade and the L-shaped steel member on the second facade are inverted relative to each other, that is, one L-shaped steel member is in an "L" shape, and the other L-shaped steel member is in a "7" shape. The L-shaped steel member is provided with through holes for installing bolts, generally two through holes are provided, and the center distance between the two through holes is not less than 2.5 times of the bolt diameter; when two adjacent modular combined steel-concrete building units are installed, the L-shaped steel member of the left modular combined steel-concrete building unit and the inverted L-shaped steel member of the right modular combined steel-concrete building unit are engaged with each other; then, the engaged L-shaped steel members are fixed with bolts, so that the steel columns of the adjacent modular combined steel-concrete building units are connected together, nearly forming a whole column to bear the load, thereby improving the bearing capacity of the entire building.

[0006] Specifically, the steel column is a steel square tube, and the top and bottom of the steel square tube are built-in stiffening plates; the top beam and the bottom beam are both I-beams.

[0007] Furthermore, a floor slab is arranged between the bottom beams, and a wall is arranged on the floor slab; and a plurality of steel sheets for carrying the joint formwork are arranged on the lower wing plate of the bottom beam.

[0008] Furthermore, C-shaped steel bars or studs are arranged on the outer side of the web of the bottom beam, and both the C-shaped steel bars and studs are used to cast the double beam joints between the two bottom beams during the subsequent installation of the modular composite steel-concrete building units.

[0009] The present invention also provides a method for producing a modular combined steel-concrete building unit, comprising the following steps: Production step 1: Cut steel squares for use as steel columns, cut I-beams for use as top and bottom beams, cut angle steels and punch holes to form L-shaped steel parts; Production step 2: Built-in welded stiffener plates at the top and bottom of the steel column, welded steel sheets at the lower wing plate of the bottom beam, and welded C-shaped steel bars or studs on the outside of the web of the bottom beam; Production step 3: welding L-shaped steel parts on the steel column; Production step 4: Welding the steel columns, top beams and bottom beams to form a rectangular box structure; Production step 5: Arrange the floor slab reinforcement and cast the floor slab. According to the design requirements, continue to install walls, doors and windows or other building accessories on the floor slab.

[0010] In the present invention, when the modular composite steel-concrete building units are installed at the construction site, the L-shaped steel pieces on the adjacent modular composite steel-concrete building units must be engaged with each other. Therefore, it is very important to accurately control the welding position of the L-shaped steel pieces in the production step 3. If each L-shaped steel piece is positioned and welded individually by conventional methods, it will be very time-consuming and prone to position errors. In order to improve the welding efficiency of the L-shaped steel pieces, the present invention uses special tools to assist in welding the L-shaped steel pieces in the production step 3. The special tools include a frame plate, a bearing plate, a guide column and a spring. The bottom surface of the frame plate is provided with two parallel vertical plates, and a slot matching the steel column is formed between the two vertical plates. The bottom surface of the frame plate is provided with a vertical guide cylinder, and the guide column passes through the frame plate and the guide cylinder from top to bottom. The spring is sleeved on the guide column and is located in the guide cylinder. A convex ring is provided on the guide column, and the convex ring is pressed on the spring. The number of guide columns is two and a handle is provided between the two guide columns. The bottom of the guide column is connected to the horizontal bearing plate, and two positioning columns are provided on the bearing plate. The production step 3 specifically includes the following steps: Production step 3.1: Place two steel columns parallely and horizontally on the working plane; Production step 3.2: Place the frame plate of the special tool on the steel column, and insert the slot under the frame plate into one of the steel columns; the load-bearing plate is located between the two steel columns; Production step 3.3: Put the through holes of the two L-shaped steel parts on the positioning columns of the load-bearing plate; Production step 3.4: spot weld the two L-shaped steel parts to the two steel columns respectively; Production step 3.5: Press the handle downward to make the two guide columns and the load-bearing plate move downward, and the positioning column is lowered to the bottom of the L-shaped steel part; then move the entire special tool along the steel column to the next position, continue to place a new L-shaped steel part on the positioning column and spot weld it; repeat this step until all L-shaped steel parts are spot welded; Production step 3.6: Separate the two steel columns and fully weld all the L-shaped steel parts; Production step 3.7: Number the welded steel columns to ensure that the two completed steel columns are used in two adjacent modular composite steel-concrete building units.

[0011] In the above welding method, the two L-shaped steel parts are placed in a bite-engaged posture in advance and then welded, which can ensure that when the subsequent modular composite steel-concrete building units are installed, the adjacent L-shaped steel parts can be aligned and bitten with each other.

[0012] Furthermore, one of the two vertical plates is provided with a bending portion, and when the slot between the two vertical plates is inserted into the steel column, a wedge-shaped area is formed between the bending portion and the steel column; a wedge-shaped plate is provided on the bearing plate, and when the bearing plate is in the highest position under the action of the spring, the wedge-shaped plate is inserted into the wedge-shaped area, and after the wedge-shaped plate is inserted into the wedge-shaped area, the special tool can be stuck at the current position of the steel column to prevent the special tool from being displaced along the steel column due to external force; when the L-shaped steel part is welded, when the worker presses down the handle to withdraw the guide column, the wedge plate will also move downward synchronously with the bearing plate to release the blocking effect on the special tool, and the worker can normally translate the special tool to weld the next L-shaped steel part.

[0013] The present invention also provides a method for installing a modular combined steel-concrete building unit, comprising the following steps: Installation step 1: hoist the modular composite steel-concrete building unit to the side of the installed modular composite steel-concrete building unit, translate the modular composite steel-concrete building unit so that the inverted L-shaped steel piece on its steel column falls on the L-shaped steel piece of the adjacent modular composite steel-concrete building unit; then fine-tune the modular composite steel-concrete building unit to a suitable position; Installation step 2: Install bolts and nuts in the through holes of the L-shaped steel piece to fix it; Installation step 3: If C-shaped steel bars are provided on the outer side of the web of the bottom beam, the stand bars are inserted into the double beam joints between the bottom beams of two adjacent modular composite steel-concrete building units, and the stand bars are tied with the C-shaped steel pieces to form a steel cage; if studs are provided on the outer side of the web of the bottom beam, the prefabricated steel cage is inserted into the joints between the bottom beams of two adjacent modular composite steel-concrete building units; Installation step 4: Place the bottom formwork on the steel sheet at the double beam joint, set the end formwork at both ends of the double beam joint, and then pour concrete at the double beam joint.

[0014] Beneficial effects: (1) The modular composite steel-concrete building unit of the present invention is provided with L-shaped steel pieces placed in opposite directions on the opposite steel columns. When installing, the adjacent modular composite steel-concrete building units can be connected to each other by using the L-shaped steel pieces, so that the steel columns of the adjacent modular composite steel-concrete building units are connected together, and approximately form a whole column to bear the load, thereby improving the bearing capacity of the entire building. (2) The modular composite steel-concrete building unit of the present invention is provided with a steel cage and poured with concrete at the joint of the double beams, so that the entire floor of the modular building is continuously stressed, effectively reducing the lateral displacement of the modular building under the action of horizontal forces such as wind and earthquake, and improving the comfort of the residents. (3) When producing the modular composite steel-concrete building unit of the present invention, special tools are used to place the two L-shaped steel pieces in a bite posture in advance and then weld them, which can ensure that when the subsequent modular composite steel-concrete building units are installed, the adjacent L-shaped steel pieces can be aligned and bitten with each other. (4) The modular composite steel-concrete building unit of the present invention is provided with a wedge plate in the special tool, which cooperates with the action of the handle to realize the position locking and unlocking of the special tool, thereby ensuring that the L-shaped steel part maintains a stable position during welding. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional diagram of the building unit of Example 1.

[0016] Figure 2 yes Figure 1 A enlarged view of .

[0017] Figure 3 yes Figure 1 B is an enlarged view of .

[0018] Figure 4 yes Figure 1 C enlarged view.

[0019] Figure 5 It is a schematic diagram of the installation of the building unit of Example 1.

[0020] Figure 6 yes Figure 5 D enlarged view.

[0021] Figure 7It is a schematic diagram of the double beam joint when the building unit of Example 1 is installed (part 1).

[0022] Figure 8 It is a schematic diagram of the double beam joint when the building unit of Example 1 is installed (part 2).

[0023] Fig. 9 It is a three-dimensional diagram of the special tool in Example 1.

[0024] Fig.10 It is a stereoscopic view of the special tool in Example 1 (from another perspective).

[0025] Fig.11 It is a front view of the special tool in Example 1.

[0026] Fig.12 yes Fig.11 Right view of .

[0027] Fig.13 yes Fig.12 AA cross-section diagram.

[0028] Fig.14 This is an application status diagram of the special tool in Example 1.

[0029] Fig.15 This is an application status diagram of the special tool in Example 1 (one steel column is hidden).

[0030] Fig.16 yes Fig.15 Right view of .

[0031] Fig.17 yes Fig.15 The status diagram after placing the L-shaped steel parts.

[0032] Fig.18 It is a working principle diagram of the special tool in Example 1.

[0033] Among them: 100, steel column; 110, stiffening plate; 200, top beam; 300, bottom beam; 310, steel sheet; 320, C-shaped steel bar; 330, studs; 340, bottom formwork; 400, L-shaped steel parts; 500, floor slab; 600, wall; 700, bolts; 800, special tools; 810, frame plate; 811, vertical plate; 811-1, bending part; 812, guide cylinder; 820, load-bearing plate; 821, positioning column; 822, wedge plate; 830, guide column; 840, spring; 850, handle. DETAILED DESCRIPTION

[0034] The present invention is further described in detail below in conjunction with specific implementation modes.

[0035] like Figure 1As shown, the modular composite steel-concrete building unit of this embodiment includes a steel column 100 , a top beam 200 , a bottom beam 300 , an L-shaped steel member 400 , a floor slab 500 and a wall 600 .

[0036] The number of steel columns 100 is four, and the steel columns 100 are cut from steel square tubes. Figure 2 and Figure 3 As shown, the top and bottom of the steel column 100 are built with stiffening plates 110. The top beam 200 and the bottom beam 300 are both I-beams, and the top beam 200 and the bottom beam 300 are respectively connected to the top and bottom of the steel column 100 to form a rectangular box structure. A floor 500 is arranged between the bottom beams 300, and a wall 600 is arranged on the floor 500.

[0037] like Figures 1 to 3 As shown, the L-shaped steel member 400 is fixed on the steel column 100 and is located on the first and second facades of the modular composite steel-concrete building unit. The first and second facades are two opposite facades of the modular composite steel-concrete building unit. The L-shaped steel member 400 on the first facade and the L-shaped steel member 400 on the second facade are inverted relative to each other, that is, one L-shaped steel member 400 is in an "L" shape, and the other L-shaped steel member 400 is in a "7" shape. The L-shaped steel member 400 is provided with through holes for installing bolts 700. Generally, two through holes are provided, and the center distance between the two through holes is not less than 2.5 times the diameter of the bolt 700. Figure 5 and Figure 6 As shown, when two adjacent modular composite steel-concrete building units are installed, the L-shaped steel member 400 of the left modular composite steel-concrete building unit and the inverted L-shaped steel member 400 of the right modular composite steel-concrete building unit are engaged with each other; then, the engaged L-shaped steel members 400 are fixed with bolts 700, so that the steel columns 100 of the adjacent modular composite steel-concrete building units are connected together, forming approximately a whole column to bear the load, thereby improving the bearing capacity of the entire building.

[0038] like Figure 4 As shown, a plurality of steel sheets 310 for supporting the joint template are arranged on the lower wing plate of the bottom beam 300. C-shaped steel bars 320 are arranged on the outer side of the web of the bottom beam 300. Figure 7 As shown, when two adjacent modular composite steel-concrete building units are installed in place, a double beam joint will be formed between the bottom beams 300 of the two adjacent modular composite steel-concrete building units, and the C-shaped steel bars 320 will cross each other at the double beam joint. Afterwards, workers insert the frame bars into the C-shaped steel bars 320, and the frame bars and the C-shaped steel bars 320 are tied to form a steel cage; then the bottom template 340 is placed on the steel sheet 310 at the double beam joint, and the end templates are set at both ends of the double beam joint; finally, concrete is poured at the double beam joint to complete the double beam joint processing, so that the floor slabs 500 of the left and right building units form a whole.

[0039] Figure 8 Another method for processing the double beam joint is shown: bolts 330 are arranged on the outer side of the web of the bottom beam 300, and in the process of assembling the two left and right modular combined steel-concrete building units, the prefabricated steel cage is inserted between the two bottom beams 300 in advance; finally, the bottom formwork 340 and the end formwork are placed in the same way, and then concrete is poured to complete the double beam joint processing.

[0040] The production method of the modular composite steel-concrete building unit of this embodiment includes the following steps: Production step 1: Cutting steel squares to be used as steel columns 100, cutting I-beams to be used as top beams 200 and bottom beams 300, cutting angle steels and punching holes to form L-shaped steel parts 400; Production step 2: welding stiffening plates 110 at the top and bottom of the steel column 100, welding steel sheets 310 at the lower wing plates of the bottom beam 300, and welding C-shaped steel bars 320 or studs 330 at the outer side of the web of the bottom beam 300; Production step 3: welding an L-shaped steel member 400 onto the steel column 100; Production step 4: welding the steel column 100, the top beam 200 and the bottom beam 300 to form a rectangular box structure; Production step 5: Arrange the reinforcement of the floor 500 and cast the floor 500. According to the design requirements, continue to install the wall 600, doors and windows or other building accessories on the floor 500.

[0041] In this embodiment, when the modular composite steel-concrete building units are installed at the construction site, the L-shaped steel pieces 400 on the adjacent modular composite steel-concrete building units must be engaged with each other. Therefore, it is very important to accurately control the welding position of the L-shaped steel pieces 400 in production step 3. If conventional methods are used to position and weld each L-shaped steel piece 400 individually, it will be very time-consuming and prone to position errors. In order to improve the welding efficiency of the L-shaped steel pieces 400, this embodiment uses a special tool 800 to assist in welding the L-shaped steel pieces 400 in the production step 3. Figures 9 to 13As shown, the special tool 800 includes a frame plate 810, a bearing plate 820, a guide column 830 and a spring 840. The bottom surface of the frame plate 810 is provided with two parallel vertical plates 811, and a slot matching the steel column 100 is formed between the two vertical plates 811; the bottom surface of the frame plate 810 is provided with a vertical guide cylinder 812, the guide column 830 passes through the frame plate 810 and the guide cylinder 812 from top to bottom, the spring 840 is sleeved on the guide column 830 and is located in the guide cylinder 812, the guide column 830 is provided with a convex ring, the convex ring presses on the spring 840, the number of the guide columns 830 is two and a handle 850 is provided between the two guide columns 830; the bottom of the guide column 830 is connected to the horizontal bearing plate 820, and the bearing plate 820 is provided with two positioning columns 821.

[0042] like Fig.12 As shown, one of the two vertical plates 811 is provided with a bending portion 811-1. Fig.16 As shown, when the slot between the two vertical plates 811 is inserted into the steel column 100, a wedge-shaped area is formed between the bending portion 811-1 and the steel column 100; a wedge-shaped plate 822 is provided on the bearing plate 820, and when the bearing plate 820 is in the highest position under the action of the spring 840, the wedge-shaped plate 822 is inserted into the wedge-shaped area. After the wedge-shaped plate 822 is inserted into the wedge-shaped area, the special tool 800 can be stuck at the current position of the steel column 100 to prevent the special tool 800 from being displaced along the steel column 100 due to external force; when the L-shaped steel part 400 is welded, when the worker presses down the handle 850 to withdraw the guide column 830, the wedge-shaped plate 822 will also move downward synchronously with the bearing plate 820, releasing the blocking effect on the special tool 800, and the worker can normally translate the special tool 800 to weld the next L-shaped steel part 400.

[0043] Production step 3 uses a special tool 800 to weld the L-shaped steel part 400, which specifically includes the following steps: Production step 3.1: Fig.14 As shown, two steel columns 100 are placed parallel and horizontally on a working plane; Production step 3.2: Fig.14 and 15 As shown, the frame plate 810 of the special tool 800 is placed on the steel column 100, and the slot below the frame plate 810 is inserted into one of the steel columns 100; the bearing plate 820 is located between the two steel columns 100; at this time, the bearing plate 820 is in a position as shown in FIG. Fig.16 In the highest position shown, the wedge plate 822 is inserted into the wedge-shaped area. After the wedge plate 822 is inserted into the wedge-shaped area, the special tool 800 can be stuck at the current position of the steel column 100; Production step 3.3: Fig.17As shown, the through holes of the two L-shaped steel pieces 400 are sleeved on the positioning posts 821 of the bearing plate 820, and the two L-shaped steel pieces 400 are facing oppositely and engaging with each other; Production step 3.4: spot welding two L-shaped steel pieces 400 to two steel columns 100 respectively; Production step 3.5: Fig.18 As shown, the handle 850 is pressed down, so that the two guide pillars 830 and the bearing plate 820 move downward, and the positioning pillar 821 is lowered to the bottom of the L-shaped steel part 400; the wedge plate 822 also moves downward synchronously with the bearing plate 820 to release the blocking effect on the special tool 800; then the entire special tool 800 is translated to the right along the steel column 100 to the next position, and a new L-shaped steel part 400 is placed on the positioning pillar 821 and spot welded; this step is repeated until all L-shaped steel parts 400 are spot welded; Production step 3.6: Separate the two steel columns 100 and fully weld all the L-shaped steel parts 400; Production step 3.7: Number the welded steel columns 100 to ensure that the two completed steel columns 100 are used in two adjacent modular composite steel-concrete building units.

[0044] The installation method of the modular combined steel-concrete building unit of this embodiment includes the following steps: Installation step 1: hoist the modular composite steel-concrete building unit to the side of the installed modular composite steel-concrete building unit, translate the modular composite steel-concrete building unit so that the inverted L-shaped steel piece 400 on its steel column 100 falls on the L-shaped steel piece 400 of the adjacent modular composite steel-concrete building unit; then fine-tune the modular composite steel-concrete building unit to a suitable position; Installation step 2: Figure 6 As shown, bolts 700 and nuts are installed in the through holes of the L-shaped steel member 400 for fixing; Installation step 3: If a C-shaped steel bar 320 is provided on the outer side of the web of the bottom beam 300, Figure 7 As shown in FIG. 1 , a reinforcement bar is inserted into the double beam joint between the bottom beams 300 of two adjacent modular composite steel-concrete building units, and the reinforcement bar is bundled with the C-shaped reinforcement bar 320 to form a reinforcement cage; if a bolt 330 is provided on the outer side of the web of the bottom beam 300, then Figure 8 As shown, a prefabricated steel cage is inserted into the joint between the bottom beams 300 of two adjacent modular composite steel-concrete building units; Installation step 4: Place the bottom formwork 340 on the steel sheet 310 at the double beam joint, set end formwork at both ends of the double beam joint, and then pour concrete at the double beam joint.

[0045] Although the embodiments of the present invention are described in the specification, these embodiments are only for reference and should not limit the protection scope of the present invention. Various omissions, substitutions and changes within the scope of the present invention should be included in the protection scope of the present invention.

Claims

1. A modular composite steel-concrete building unit, characterized in that: Including steel columns, top beams, bottom beams and L-shaped steel parts; The top beam and the bottom beam are respectively connected to the top and bottom of the steel column to form a rectangular box structure; The L-shaped steel member is fixed on the steel column and is located on the first and second facades of the modular composite steel-concrete building unit. The first facade and the second facade are two opposite facades of the modular composite steel-concrete building unit. The L-shaped steel member on the first facade and the L-shaped steel member on the second facade are inverted relative to each other, and the L-shaped steel member is provided with through holes for installing bolts. When two adjacent modular composite steel-concrete building units are installed, the L-shaped steel member of the left modular composite steel-concrete building unit and the inverted L-shaped steel member of the right modular composite steel-concrete building unit are engaged with each other.

2. The modular composite steel-concrete building unit according to claim 1 is characterized in that: The steel column is a steel square tube, and stiffening plates are built into the top and bottom of the steel square tube; the top beam and the bottom beam are both I-beams.

3. The modular composite steel-concrete building unit according to claim 2 is characterized in that: A floor slab is arranged between the bottom beams, and a wall is arranged on the floor slab; a plurality of steel sheets for carrying the joint formwork are arranged on the lower wing plate of the bottom beam.

4. The modular composite steel-concrete building unit according to claim 2 is characterized in that: The outer side of the web of the bottom beam is provided with C-shaped steel bars.

5. The modular composite steel-concrete building unit according to claim 2 is characterized in that: The outer side of the web of the bottom beam is provided with bolts.

6. A method for producing a modular composite steel-concrete building unit as claimed in any one of claims 3 to 5, characterized in that The steps include: Production step 1: Cut steel squares to be used as steel columns, cut I-beams to be used as top and bottom beams, cut angle steels and punch holes to form L-shaped steel parts; Production step 2: Built-in welded stiffening plates at the top and bottom of the steel column, welded steel sheets at the lower wing plate of the bottom beam, and welded C-shaped steel bars or studs on the outside of the web of the bottom beam; Production step 3: Welding L-shaped steel parts on the steel column; Production step 4: welding the steel columns, top beams and bottom beams to form a rectangular box structure; Production step 5: Arrange the floor slab reinforcement and cast the floor slab.

7. The method for producing modular composite steel-concrete building units according to claim 6, characterized in that: In step 3, a special tool is used to assist in welding the L-shaped steel part; the special tool includes a frame plate, a bearing plate, a guide column and a spring, the bottom surface of the frame plate is provided with two parallel vertical plates, and a slot matching the steel column is formed between the two vertical plates; the bottom surface of the frame plate is provided with a vertical guide cylinder, the guide column passes through the frame plate and the guide cylinder from top to bottom, the spring is sleeved on the guide column and located in the guide cylinder, the guide column is provided with a convex ring, the convex ring is pressed on the spring, the number of guide columns is two and a handle is provided between the two guide columns; the bottom of the guide column is connected to the horizontal bearing plate, and two positioning columns are provided on the bearing plate; The step 3 specifically includes the following steps: Production step 3.1: Place two steel columns parallely and horizontally on the working plane; Production step 3.2: Place the frame plate of the special tool on the steel column, and insert the slot under the frame plate into one of the steel columns; the load-bearing plate is located between the two steel columns; Production step 3.3: Put the through holes of the two L-shaped steel parts on the positioning columns of the load-bearing plate; Production step 3.4: spot weld the two L-shaped steel parts to the two steel columns respectively; Production step 3.5: Press the handle downward to make the two guide columns and the load-bearing plate move downward, and the positioning column is lowered to the bottom of the L-shaped steel part; then move the entire special tool along the steel column to the next position, continue to place a new L-shaped steel part on the positioning column and spot weld it; repeat this step until all L-shaped steel parts are spot welded; Production step 3.6: Separate the two steel columns and fully weld all the L-shaped steel parts.

8. The method for producing modular composite steel-concrete building units according to claim 7, characterized in that: It also includes production step 3.7: numbering the welded steel columns to ensure that the two completed steel columns are used in two adjacent modular composite steel-concrete building units.

9. The method for producing modular composite steel-concrete building units according to claim 7, characterized in that: One of the two vertical plates is provided with a bending portion, and when the slot between the two vertical plates is inserted into the steel column, a wedge-shaped area is formed between the bending portion and the steel column; The bearing plate is provided with a wedge plate, and when the bearing plate is at the highest position under the action of the spring, the wedge plate is inserted into the wedge-shaped area.

10. A method for installing a modular composite steel-concrete building unit as claimed in any one of claims 3 to 5, characterized in that The steps include: Installation step 1: hoist the modular composite steel-concrete building unit to the side of the installed modular composite steel-concrete building unit, translate the modular composite steel-concrete building unit so that the inverted L-shaped steel piece on its steel column falls on the L-shaped steel piece of the adjacent modular composite steel-concrete building unit; then fine-tune the modular composite steel-concrete building unit to a suitable position; Installation step 2: Install bolts and nuts in the through holes of the L-shaped steel piece to fix it; Installation step 3: If C-shaped steel bars are provided on the outer side of the web of the bottom beam, the stand bars are inserted into the double beam joints between the bottom beams of two adjacent modular composite steel-concrete building units, and the stand bars are tied with the C-shaped steel pieces to form a steel cage; if studs are provided on the outer side of the web of the bottom beam, the prefabricated steel cage is inserted into the joints between the bottom beams of two adjacent modular composite steel-concrete building units; Installation step 4: Place the bottom formwork on the steel sheet at the double beam joint, set the end formwork at both ends of the double beam joint, and then pour concrete at the double beam joint.

Images