Fabricated building prefabricated composite beam waist muscle post-connection construction method

Abstract

The application discloses a kind of fabricated building prefabricated composite beam waist muscle post-connection construction methods, specifically related to prefabricated composite beam waist muscle post-connection technical field, specific construction steps are as follows;Step one, fabricated building prefabricated composite beam connecting structure.The present application uses positioning steel and on-site reserved waist muscle even if there is collision also forms superposition embedded locking, so as to avoid causing positioning steel to be not tied in place, form superposition connection, not only will not affect construction progress, but also will improve construction quality, so that the first butt joint cross beam, second butt joint cross beam, support vertical beam connecting place connection is more firm, stability is better, ensure that multiple positioning steels are not prone to inclination when pouring, stability is better, above-mentioned can effectively improve fabricated building prefabricated composite beam waist muscle post-connection efficiency, and improve the firmness of connection, effectively improve fabricated building prefabricated composite beam waist muscle post-connection construction quality.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of prefabricated composite beam waistline rear connection, more particularly, the present application relates to a prefabricated composite beam waistline rear connection construction method for fabricated building. BACKGROUND

[0002] With the continuous promotion of fabricated building, prefabricated composite beams, prefabricated columns and other components are widely used in construction sites. At the joints of prefabricated composite beams and prefabricated columns, cast-in-place concrete is used on site. The traditional construction method uses a reserved waistline anchoring end for prefabricated composite beams.

[0003] The prior art patent application No. CN112593627A discloses a prefabricated composite beam connecting structure and its construction method, which includes a cast-in-place beam column and a spliced beam. The cast-in-place beam column includes a column body and a cross beam. The cross beam is connected to the spliced beam through a connecting device. The connecting device includes upper connecting steel bars, lower connecting steel bars, upper splicing steel bars, lower splicing steel bars and connecting pieces. The end of the protruding part of the lower connecting steel bar is bent upwards. The end of the protruding part of the lower splicing steel bar is bent upwards. The connecting pieces are arranged between the overlapping sections of the upper connecting steel bars and the upper splicing steel bars and the overlapping sections of the lower connecting steel bars and the lower splicing steel bars. The connecting pieces include front side plates, rear side plates and connecting plates. The front side plates and the rear side plates are arranged parallel to each other. The connecting plates are connected between the front side plates and the rear side plates. The technical problem of poor connection strength and overall performance between the cast-in-place beam column and the spliced beam can be solved.

[0004] However, during the construction of the prefabricated composite beam connecting structure, a prefabricated spliced beam is needed, and a barb and a lower splicing steel bar are embedded in the spliced beam to complete the splicing operation. Since the column hoop and the on-site reserved waistline collide, the column hoop may not be properly tied, which not only affects the construction progress but also poses a risk to the construction quality. SUMMARY

[0005] In order to overcome the above-mentioned defects of the prior art, the present application provides a prefabricated composite beam waistline rear connection construction method for fabricated building to solve the problems raised in the background art.

[0006] To achieve the above-mentioned purpose, the present application provides the following technical solution: a prefabricated composite beam waistline rear connection construction method for fabricated building, the specific construction steps are as follows:

[0007] Step one, prefabricated composite beam connecting structure of assembled building, the connecting structure includes first docking crossbeam, one side of the first docking crossbeam is equipped with second docking crossbeam, upper position of the second docking crossbeam is installed with upper support vertical column, the position between the first docking crossbeam and the second docking crossbeam is equipped with superposition mechanism, the upper surface of the first docking crossbeam and the second docking crossbeam is installed with side-by-side fixed assembly, and the structure is made as above.

[0008] Step two, when docking and installing, the support vertical column can be hoisted to be vertical, then the first docking crossbeam is hoisted to the left side position of the support vertical column by using the crane, and the second docking crossbeam is hoisted to the right side position of the support vertical column, so that the first docking crossbeam and the second docking crossbeam can be superimposed and embedded, and the superposition mechanism is superimposed on the upper surface position of the support vertical column, so as to realize superimposed connection.

[0009] Step three, when locking and connecting, the support vertical column and the second docking crossbeam can be connected by using the side-by-side fixed assembly, and the first docking crossbeam and the support vertical column can be connected and tightened by another side-by-side fixed assembly, so that the first docking crossbeam, the support vertical column and the second docking crossbeam are connected to realize assembled superimposed connection.

[0010] Preferably, the superposition mechanism includes a plurality of positioning steel bars arranged between the first docking crossbeam and the second docking crossbeam, one side of the first docking crossbeam is embedded with four docking screws, an outer portion of each docking screw and away from the first docking crossbeam is sleeved with a locking nut, a locking sleeve plate is arranged on the outer wall of the docking screw and located at one side of the locking nut, two connecting nuts are arranged at the other side of the locking nut, a docking screw hole is formed in the inner wall of the connecting nut, and a movable connecting extrusion sleeve block is arranged on one side of the connecting nut, one side of the second docking crossbeam is embedded with four insertion screws, two second superposition short columns are embedded in one side of the second docking crossbeam and close to the bottom end thereof, a second superposition long column is arranged on one side of each second superposition short column, the locking nut is threadedly connected with the docking screw, the two docking screws are movably connected with the locking sleeve plate, the first superposition short column and the first superposition long column are fixedly connected with the first docking crossbeam, and the length of the first superposition long column is greater than the length of the first superposition short column.

[0011] Preferably, the positioning sleeve cover plate is arranged above the positioning steel bars, a plurality of pouring rectangular holes are formed in the top end of the positioning sleeve cover plate, an insertion hole is formed in the top end of the positioning sleeve cover plate and located at the two sides of the pouring rectangular hole, and a fixing nut is arranged on the top end of the positioning sleeve cover plate and close to the four corner lines, a connecting screw is arranged below the positioning sleeve cover plate and located between the two positioning steel bars, and the number of the connecting screws is four.

[0012] Preferably, the parallel fixing assembly includes multiple U-shaped pre-embedded steel bars arranged equidistantly from left to right at the top of the second connecting beam. The inner wall of the U-shaped pre-embedded steel bars is provided with multiple connecting steel bars arranged equidistantly from front to back. A binding wire is fitted onto the outer wall of the U-shaped pre-embedded steel bars. A connecting support plate is welded to one end of the connecting steel bars. A fixing collar plate is fixed on one side of the connecting support plate near its bottom end. A positioning screw is inserted into the top of the fixing collar plate. A compression nut is provided on the outer wall of the positioning screw and on the upper surface of the fixing collar plate. A collar fixing support plate is fixed on one side of the fixing collar plate. The positioning screw is movably connected to the fixing collar plate, and the positioning screw is threadedly connected to the compression nut. The multiple connecting steel bars are located at the same horizontal line position. The multiple connecting steel bars are all welded and fixed to the U-shaped pre-embedded steel bars. The vertical cross-sectional shape of the structure formed by the connecting support plate and the fixing collar plate is L-shaped.

[0013] The technical effects and advantages of this invention are as follows:

[0014] 1. This invention adopts a parallel connection, where the first and second connecting beams can be superimposed and embedded. The superposition mechanism is superimposed on the upper surface of the supporting vertical beam to achieve a superposition connection. The parallel fixing components connect the supporting vertical beam and the second connecting beam, and another parallel fixing component connects and binds the first connecting beam and the supporting vertical beam tightly. Even if there is a collision between the positioning steel bars and the pre-reserved web reinforcement on site, a superposition embedding and locking is formed. This avoids the positioning steel bars from being tied in place, forming a superposition connection, which is more convenient to tie. It will not only not affect the construction progress, but also improve the construction quality.

[0015] 2. This invention employs a stacking mechanism to insert two first stacked short columns and two first stacked long columns into the gaps between multiple positioning reinforcing bars. The second connecting beam moves the two second stacked short columns and two second stacked long columns, with the second stacked short columns positioned above the first stacked short columns to achieve stacking and crossing. The connecting screw hole inside the connecting nut is threadedly connected to the insertion screw rod. The connecting nut presses against the pressing collar block, which can perform pressing and limiting operations on multiple positioning reinforcing bars. Furthermore, rotating the locking nut causes the locking nut and the connecting screw rod to move under the action of the threads. In this way, multiple points are fixed during the stacking connection, resulting in a more secure and stable connection at the joints of the first connecting beam, the second connecting beam, and the supporting vertical beam.

[0016] 3、The present application adopts side-by-side fixed assembly to insert multiple connecting steel bars into the bottom end of the inner wall of the U-shaped embedded steel, then uses a binding steel wire to cover the connecting position of the connecting steel bar and the U-shaped embedded steel, clamps the binding steel wire to rotate, the connecting steel bar supports and reinforces the connecting branch plate, and the connecting branch plate supports the fixed sleeve ring plate, so that the second butt joint cross beam and multiple positioning steel bars are connected and locked, the support vertical beam is connected with the second butt joint cross beam, and side-by-side connection is realized, which effectively improves the stability of the positioning sleeve ring cover plate, ensures that multiple positioning steel bars are not easy to tilt during pouring, and has better stability.

[0017] In summary, through the mutual influence of the above multiple effects, the positioning steel bar and the on-site reserved waist muscle are stacked, embedded, and locked even if there is a collision, which avoids the positioning steel bar from being not tied in place, forms a stacked connection, and is more convenient to tie, and not only does not affect the construction progress, but also improves the construction quality, so that the first butt joint cross beam, the second butt joint cross beam, and the support vertical beam are more firmly connected at the connection position, have better stability, ensure that multiple positioning steel bars are not easy to tilt during pouring, and have better stability, and the above can effectively improve the connection efficiency of the prefabricated composite beam waist muscle of the prefabricated building, improve the firmness of the connection, and effectively improve the construction quality of the prefabricated composite beam waist muscle connection of the prefabricated building. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a prefabricated building prefabricated composite beam connection structure assembly state structure schematic diagram.

[0019] Figure 2 It is a prefabricated building prefabricated composite beam connection structure disassembly state structure schematic diagram.

[0020] Figure 3 It is a prefabricated building prefabricated composite beam connection structure in which the positioning steel bar is cut off locally.

[0021] Figure 4 It is a prefabricated building prefabricated composite beam connection structure in which the positioning steel bar is cut off locally. Figure 2 It is a prefabricated building prefabricated composite beam connection structure in which the positioning steel bar is cut off locally.

[0022] Figure 5 It is a prefabricated building prefabricated composite beam connection structure in which the positioning steel bar is cut off locally.

[0023] Figure 6 It is a prefabricated building prefabricated composite beam connection structure in which the positioning steel bar is cut off locally. Figure 3 It is a prefabricated building prefabricated composite beam connection structure in which the positioning steel bar is cut off locally.

[0024] The attached diagram is labeled as follows: 1. First connecting beam; 2. Second connecting beam; 3. Supporting vertical beam; 4. Positioning reinforcing bar; 5. Connecting bolt; 6. Locking nut; 7. Locking collar support plate; 8. First stacked short column; 9. First stacked long column; 10. Connecting bolt hole; 11. Connecting nut; 12. Extrusion collar block; 13. Insertion bolt; 14. Second stacked short column; 15. Second stacked long column; 16. Positioning collar cover plate; 17. Cast rectangular hole; 18. Insertion hole; 19. Fixing nut; 20. U-shaped embedded reinforcing bar; 21. Connecting reinforcing bar; 22. Binding wire; 23. Connecting support plate; 24. Fixing collar plate; 25. Positioning bolt; 26. Extrusion nut; 27. Collar fixing support plate; 28. Connecting bolt. Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] As attached Figures 1-6 As shown, a construction method for post-connection of precast composite beam web reinforcement in prefabricated buildings is described. The superposition mechanism includes multiple positioning steel bars 4 set between a first connecting beam 1 and a second connecting beam 2. Four pre-embedded connecting bolts 5 are embedded on one side of the first connecting beam 1. A locking nut 6 is fitted on the outside of each connecting bolt 5 away from the first connecting beam 1. A locking collar support plate 7 is provided on the outer wall of the connecting bolt 5 and on one side of the locking nut 6. Two connecting nuts 11 are provided on the other side of the locking nut 6. Connecting bolt holes 10 are opened on the inner wall of the connecting nuts 11. One side of the first connecting beam 1 is equipped with a movable extrusion collar block 12. Four plug-in screws 13 are embedded and cast on one side of the second connecting beam 2. Two second stacked short columns 14 are embedded and pre-embedded on one side of the second connecting beam 2 near its bottom end. Each second stacked short column 14 has a second stacked long column 15 on one side. The locking nut 6 is threadedly connected to the connecting screw 5. Both connecting screws 5 are movably connected to the locking collar support plate 7. The first stacked short column 8 and the first stacked long column 9 are cast and fixed between the first connecting beam 1. The length of the first stacked long column 9 is greater than the length of the first stacked short column 8.

[0027] In the use of the embodiment, the second connecting cross beam 2 is hoisted to the right side of the supporting vertical beam 3, the first connecting cross beam 1 drives the four connecting screw rods 5 to be inserted into the gaps between the positioning steel bars 4, the two first superimposed short columns 8 and the two first superimposed long columns 9 are also inserted into the gaps between the positioning steel bars 4, then the second connecting cross beam 2 is hoisted to move to the left, the second connecting cross beam 2 drives the two second superimposed short columns 14 and the two second superimposed long columns 15 to move, the second superimposed long columns 15 can be inserted into the upper surface of the first superimposed long columns 9 to achieve superimposed insertion, the connecting nut 11 is rotated, the connecting screw hole 10 in the connecting nut 11 is threadedly connected with the plug-in screw rod 13, the extrusion sleeve ring block 12 can extrude and limit the positioning steel bars 4, the locking nut 6 is moved under the action of the thread, the locking nut 6 extrudes the locking sleeve ring support plate 7, and the four connecting screw rods 5 are tightly locked.

[0028] In some embodiments, as shown in the accompanying drawings, Figures 1-5 The upper portion of the positioning steel bar 4 is provided with a positioning sleeve ring cover plate 16, the top end of the positioning sleeve ring cover plate 16 is embedded with a plurality of pouring rectangular holes 17, the top end of the positioning sleeve ring cover plate 16 and located at both sides of the pouring rectangular hole 17 are provided with plug-in holes 18, and the top end of the positioning sleeve ring cover plate 16 and close to the four corner lines are provided with fixed nuts 19, the lower portion of the positioning sleeve ring cover plate 16 and between the two positioning steel bars 4 are provided with connecting screw rods 28, and the number of the connecting screw rods 28 is four, so that the positioning sleeve ring cover plate 16 and the plug-in holes 18 therein are inserted into the positioning steel bars 4, and the through holes in the fixed nuts 19 can be inserted into the connecting screw rods 28, after the insertion, the fixed nuts 19 are rotated and threadedly connected with the connecting screw rods 28 to achieve locking.

[0029] In some embodiments, as shown in the accompanying drawings, Figures 2-6As shown, the side-by-side fixing assembly comprises a plurality of U-shaped embedded steel bars 20 arranged equidistantly from left to right at the top end of the second butt beam 2, the inner wall of the U-shaped embedded steel bar 20 is provided with a plurality of connecting steel bars 21 arranged equidistantly from front to back, a steel wire 22 is tightly sleeved on the outer wall of the U-shaped embedded steel bar 20, one end of the connecting steel bar 21 is welded with a connecting branch plate 23, a fixed sleeve ring plate 24 is fixed on one side of the connecting branch plate 23 and close to the bottom end position of the connecting branch plate 23, a positioning screw rod 25 is embedded and inserted at the top end of the fixed sleeve ring plate 24, an extrusion nut 26 is arranged on the outer wall of the positioning screw rod 25 and located on the upper surface of the fixed sleeve ring plate 24, a sleeve ring fixed branch plate 27 is fixed on one side of the fixed sleeve ring plate 24, the positioning screw rod 25 is movably connected with the fixed sleeve ring plate 24, and the positioning screw rod 25 is threadedly connected with the extrusion nut 26, a plurality of connecting steel bars 21 are located at the same horizontal position, a plurality of connecting steel bars 21 are all welded with the U-shaped embedded steel bar 20, and the structure composed of the connecting branch plate 23 and the fixed sleeve ring plate 24 is provided with an L-shaped vertical section shape;

[0030] In use, the sleeve ring fixed branch plate 27 and the fixed sleeve ring plate 24 are welded and fixed, a plurality of connecting steel bars 21 are inserted into the inner wall bottom end position of the U-shaped embedded steel bar 20, the steel wire 22 is tightly sleeved at the connecting position of the connecting steel bar 21 and the U-shaped embedded steel bar 20, the connecting steel bar 21 and the U-shaped embedded steel bar 20 are connected to form a connecting locking operation, a plurality of U-shaped embedded steel bars 20 can fix the connecting steel bars 21, and the connecting branch plate 23 supports the fixed sleeve ring plate 24, and the fixed sleeve ring plate 24 is locked and fixed by rotating the extrusion nut 26.

[0031] The embodiments of the application are as follows:

[0032] When the docking installation, the support vertical beam 3 can be hoisted into a vertical state, and then the first docking crossbeam 1 is hoisted to the left side of the support vertical beam 3, and the second docking crossbeam 2 is hoisted to the right side of the support vertical beam 3, so that the first docking crossbeam 1 and the second docking crossbeam 2 can be stacked and embedded, so that the first docking crossbeam 1 drives the four docking screws 5 to be inserted into the gap between the plurality of positioning steel bars 4, and the two first stacked short columns 8 and the two first stacked long columns 9 are also inserted into the gap between the plurality of positioning steel bars 4, then the second docking crossbeam 2 is hoisted and moved to the left, so that the second docking crossbeam 2 drives the two second stacked short columns 14 and the two second stacked long columns 15 to move, and the second stacked short column 14 is located above the first stacked short column 8 to realize the stacked cross, the second stacked long column 15 can be inserted into the upper surface position of the first stacked long column 9 to realize the stacked insertion, the plug-in screw 13 is inserted into the extrusion sleeve ring block 12, and the connecting nut 11 is rotated, the docking screw hole 10 in the connecting nut 11 is connected with the plug-in screw 13, the connecting nut 11 extrudes the extrusion sleeve ring block 12, so that the extrusion sleeve ring block 12 can extrude and limit the plurality of positioning steel bars 4, and the locking nut 6 is rotated, the locking nut 6 and the docking screw 5 are connected under the action of the thread, the locking nut 6 extrudes the locking sleeve ring support plate 7, the locking sleeve ring support plate 7 can extrude the side surface position of the positioning steel bar 4, so that the four docking screws 5 can be tightly locked, and then the positioning sleeve ring cover plate 16 is moved downward, the positioning sleeve ring cover plate 16 is inserted into the positioning steel bar 4 through the plug-in hole 18 in the middle, and the through hole of the fixing nut 19 can be inserted into the connecting screw 28, after the insertion, the fixing nut 19 is rotated, the fixing nut 19 and the connecting screw 28 are connected by screw threads, and the fixing nut 19 can extrude the positioning sleeve ring cover plate 16, and the positioning sleeve ring cover plate 16 extrudes and fixes the first docking crossbeam 1;

[0033] When the locking connection is achieved, the sleeve fixing plate 27 and the fixing sleeve plate 24 can be welded and fixed by using the sleeve, the connecting steel bars 21 are inserted into the inner wall bottom end of the U-shaped embedded steel bar 20, the binding steel wire 22 is sleeved on the connecting position of the connecting steel bar 21 and the U-shaped embedded steel bar 20, the binding steel wire 22 is clamped and rotated, the connecting steel bar 21 and the U-shaped embedded steel bar 20 are connected, the U-shaped embedded steel bars 20 can fix the connecting steel bars 21, the connecting steel bars 21 support and reinforce the connecting plate 23, the connecting plate 23 supports the fixing sleeve plate 24, the fixing sleeve plate 24 is locked and fixed by rotating the extrusion nut 26 and the positioning screw 25 under the action of the thread, so that the second connecting cross beam 2 and the plurality of positioning steel bars 4 are connected and locked, the support vertical beam 3 and the second connecting cross beam 2 are connected, the first connecting cross beam 1 and the support vertical beam 3 are connected and bound by the above fixing mode, and the first connecting cross beam 1, the support vertical beam 3 and the second connecting cross beam 2 are connected and assembled.

[0034] Finally, it should be pointed out that: first, in the description of the present application, it should be pointed out that, unless otherwise specified and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, which can be mechanical connection or electrical connection, or the communication between two elements, or direct connection, "up", "down", "left", "right" and the like are only used to indicate the relative positional relationship, when the absolute position of the described object changes, the relative positional relationship may change;

[0035] Secondly: the present application discloses the structure related to the embodiment of the present application in the embodiment, other structures can refer to the usual design, and under the condition of no conflict, the same embodiment and different embodiments of the present application can be combined with each other;

[0036] Finally: the above only describes the preferred embodiment of the present application, and is not used to limit the present application, any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A construction method for post-connection of web reinforcement in precast composite beams of assembled buildings, characterized in that: The specific construction steps are as follows; Step 1: Prefabricated composite beam connection structure for prefabricated buildings. The connection structure includes a first connecting beam (1), a second connecting beam (2) on one side of the first connecting beam (1), a supporting vertical beam (3) installed below the second connecting beam (2), a stacking mechanism between the first connecting beam (1) and the second connecting beam (2), and parallel fixing components installed on the upper surfaces of the first connecting beam (1) and the second connecting beam (2). The structure is made as described above. Step 2: During the docking installation, the supporting vertical beam (3) is hoisted into a vertical state, and then the first docking crossbeam (1) is hoisted to the left side of the supporting vertical beam (3) by a crane, and the second docking crossbeam (2) is hoisted to the right side of the supporting vertical beam (3). In this way, the first docking crossbeam (1) and the second docking crossbeam (2) are superimposed and embedded, and the superposition mechanism is superimposed on the upper surface of the supporting vertical beam (3) to achieve superposition connection. Step 3: When locking the connection, use the parallel fixing components to connect the support vertical beam (3) and the second docking horizontal beam (2), and use another parallel fixing component to connect and bind the first docking horizontal beam (1) and the support vertical beam (3), so that the connection of the first docking horizontal beam (1), the support vertical beam (3) and the second docking horizontal beam (2) can be assembled and superimposed. The superposition mechanism includes multiple positioning steel bars (4) set between the first connecting beam (1) and the second connecting beam (2). Four connecting screws (5) are embedded and cast on one side of the first connecting beam (1). A locking nut (6) is fitted on the outside of each connecting screw (5) away from the first connecting beam (1). A locking collar support plate (7) is provided on the outer wall of the connecting screw (5) and on the side of the locking nut (6). Two connecting nuts (11) are provided on the other side of the locking nut (6). A connecting screw hole (10) is opened on the inner wall of the connecting nut (11). A movable extrusion collar block (12) is installed on one side of the connecting nut (11). Four plug-in screws (13) are embedded and cast on one side of the second connecting beam (2). Two second superposition short columns (14) are embedded and cast on one side of the second connecting beam (2) and near its bottom end. A second superposition long column (15) is provided on one side of each second superposition short column (14). The parallel fixing assembly includes multiple U-shaped pre-embedded steel bars (20) arranged equidistantly from left to right at the top of the second connecting beam (2). The inner wall of the U-shaped pre-embedded steel bars (20) is provided with multiple connecting steel bars (21) arranged equidistantly from front to back. A binding wire (22) is fitted on the outer wall of the U-shaped pre-embedded steel bars (20). A connecting support plate (23) is welded to one end of the connecting steel bar (21). A fixing collar plate (24) is fixed on one side of the connecting support plate (23) and near its bottom end. A positioning screw (25) is inserted into the top of the fixing collar plate (24). A compression nut (26) is provided on the outer wall of the positioning screw (25) and on the upper surface of the fixing collar plate (24). A collar fixing support plate (27) is fixed on one side of the fixing collar plate (24).

2. The construction method for post-connection of web reinforcement in prefabricated composite beams of assembled buildings according to claim 1, characterized in that: The locking nut (6) is threadedly connected to the connecting screw (5), and both connecting screws (5) are movably connected to the locking collar support plate (7).

3. The construction method for post-connection of web reinforcement in prefabricated composite beams of assembled buildings according to claim 1, characterized in that: Both the first stacked short column (8) and the first stacked long column (9) are cast and fixed between the first connecting beam (1), and the length of the first stacked long column (9) is greater than the length of the first stacked short column (8).

4. The construction method for post-connection of web reinforcement in prefabricated composite beams of assembled buildings according to claim 1, characterized in that: A positioning collar cover plate (16) is provided above the positioning steel bar (4). Multiple casting rectangular holes (17) are embedded in the top of the positioning collar cover plate (16). Insertion holes (18) are provided at the top of the positioning collar cover plate (16) and on both sides of the casting rectangular holes (17). Fixing nuts (19) are provided at the top of the positioning collar cover plate (16) near the four corners.

5. The construction method for post-connection of web reinforcement in prefabricated composite beams of assembled buildings according to claim 4, characterized in that: A connecting screw (28) is provided below the positioning collar cover plate (16) and between the two positioning steel bars (4), and the number of connecting screws (28) is set to four.

6. The construction method for post-connection of web reinforcement in prefabricated composite beams of assembled buildings according to claim 1, characterized in that: The positioning screw (25) is movably connected to the fixed collar plate (24), and the positioning screw (25) is threadedly connected to the compression nut (26).

7. The construction method for post-connection of web reinforcement in prefabricated composite beams of assembled buildings according to claim 1, characterized in that: Multiple connecting steel bars (21) are located at the same horizontal line position, and multiple connecting steel bars (21) are welded and fixed to U-shaped pre-embedded steel bars (20).

8. The construction method for post-connection of web reinforcement in prefabricated composite beams of assembled buildings according to claim 1, characterized in that: The vertical cross-sectional shape of the structure formed by the connecting support plate (23) and the fixing collar plate (24) is set to L-shape.

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