Positioning tool and positioning method for spliced steel beam between top ends of two T-shaped steel columns

Abstract

The application discloses a positioning tool for splicing steel beams between two T-shaped steel stand columns and a positioning method thereof, and solves the problem of how to develop a positioning tool for connecting plates used for splicing T-shaped steel stand columns and I-shaped steel beams; the traditional splicing of the connecting plate and the I-shaped steel beam in the air is moved to the ground, so that bolt holes on the connecting plate and bolt holes at two ends of the I-shaped steel beam are accurately butted in place, the structure and the use method of the pre-positioning pin column are creatively invented, the accurate butt joint of the bolt holes on the high connecting plate and the bolt holes on the two webs is greatly facilitated, and the construction progress is accelerated.

Description

Technical Field

[0001] This invention relates to a steel beam hoisting fixture, and more particularly to a positioning fixture and positioning method for splicing steel beams between the tops of two T-shaped steel columns. Background Technology

[0002] In recent years, the number of projects constructing steel structure substation distribution rooms has been increasing. The main frame of the substation distribution room adopts a large-span steel column frame structure. The existing construction process for large-span steel column frames is as follows: First, two adjacent T-shaped steel columns are installed in place. An I-shaped steel beam connection space is set between the I-beam segments above the two T-shaped steel columns. Then, four steel plate connecting plates are respectively connected to both sides of the web plates at both ends of the spliced ​​I-beam (the connecting plates are bolted to the I-beam). A crane is used to hoist the spliced ​​I-beam with connecting plates between the tops of the two steel columns. Construction workers remove the four connecting plates from the web plates at both ends of the spliced ​​I-beam in mid-air. The spliced ​​I-beam is then lowered to the top of the spliced ​​I-beam by the hoisting equipment. Within the space where the steel beams are erected, the spliced ​​I-beams are connected to the I-beam segments at the top of the two T-beam columns. Operators then align four connecting plates in mid-air with the top of the T-beam columns and the ends of the spliced ​​I-beams, finally securing them with bolts. This completes the splicing of the I-beams between the two large-span T-beam columns. Because the splicing work is carried out at high altitude, the operating platform is limited, and each connecting plate weighs approximately 20 kg. The difficulty of positioning the connecting plates when operators are bending over at high altitudes makes the work very challenging and increases the operational risk. Therefore, developing an efficient and convenient positioning fixture and connection method for splicing T-beam columns and spliced ​​I-beams has become an urgent problem to be solved on the construction site. Summary of the Invention

[0003] This invention provides a positioning fixture and method for splicing steel beams between the tops of two T-shaped steel columns, solving the technical problem of how to develop an efficient and convenient positioning fixture for a connecting plate for splicing T-shaped steel columns and I-shaped steel beams.

[0004] The present invention solves the above technical problems through the following technical solutions: The overall concept of this invention is as follows: Since the bolt holes on the web of the horizontal I-beam section at the top of the T-shaped steel column, the bolt holes on the webs at both ends of the spliced ​​I-beam, and the bolt holes on the connecting plates are all pre-machined on the ground, and only after this work is completed can the aerial installation and splicing take place; this invention fully utilizes these technological features, moving the traditional aerial splicing of the connecting plates and the spliced ​​I-beam to the ground, ensuring accurate alignment of the bolt holes on the connecting plates with the bolt holes at both ends of the spliced ​​I-beam. Before hoisting the spliced ​​I-beam, pre-positioning pins are inserted into the bolt holes on the webs at both ends of the spliced ​​I-beam on the ground, and then the front and rear connecting plates are positioned and inserted into the ends of the pre-positioning pins. The spacing between the front and rear connecting plates is made greater than the width of the upper and lower flange plates of the spliced ​​I-beam. The spliced ​​I-beam with four pre-positioned connecting plates is hoisted directly above the spliced ​​I-beam erection connection space. Then, it is vertically downward, so that it aligns with the horizontal I-beam segments at the top of two adjacent T-shaped steel columns. Subsequently, guided by four pre-positioned pins, the four connecting plates are moved to the web of the horizontal I-beam segment at the top of the T-shaped steel column and the web of the spliced ​​I-beam. This achieves accurate alignment in the air between the bolt holes on the connecting plates and the bolt connection holes on the web of the horizontal I-beam segment at the top of the T-shaped steel column and the connecting bolt holes on the webs at both ends of the spliced ​​I-beam, greatly reducing the difficulty and workload of the operators in aerial alignment.

[0005] A positioning fixture for splicing a steel beam between the tops of two T-shaped steel columns includes a left T-shaped steel column and a right T-shaped steel column. A right horizontal I-beam segment is positioned at the top of the left T-shaped steel column. On the web of the right end of the right horizontal I-beam segment, there is an array of connecting bolt holes for the right horizontal I-beam segment. A left horizontal I-beam segment is positioned at the top of the right T-shaped steel column. On the web of the left horizontal I-beam segment, there is an array of connecting bolt holes for the left horizontal I-beam segment. The right horizontal I-beam segment connects to the left horizontal I-beam segment... Between the I-shaped steel beam segments, there are splicing spaces for I-shaped steel beams. Within these spaces, I-shaped steel beams are spliced ​​together. On the left web of each I-shaped steel beam, there is an array of left-end connecting bolt holes. On the right web of each I-shaped steel beam, there is an array of right-end connecting bolt holes. A pre-positioning pin is inserted into one of the arrayed left-end connecting bolt holes. The front end of the pre-positioning pin has an external thread, and the rear end of the pre-positioning pin has an external thread. The external thread at the front end of the pin connects to the pin... On the pre-positioning pins between the rear external threads, there are positioning pin holes for the left front connecting plate, the front positioning pin hole of the left end web of the I-beam, the rear positioning pin hole of the left end web of the I-beam, and the left rear connecting plate, respectively. The left end web of the I-beam passes between the front and rear positioning pin holes of the left end web of the I-beam. A front positioning cotter pin of the left end web of the I-beam moves through the front positioning pin hole, and a rear positioning pin of the left end web moves through the rear positioning pin hole. A positioning cotter pin is used; a left front connecting plate passes between the external thread at the front end of the pin and the positioning pin hole of the left front connecting plate, and a positioning cotter pin of the left front connecting plate moves through the positioning pin hole of the left front connecting plate; a front positioning nut is screwed onto the external thread at the front end of the pin; a left rear connecting plate is provided between the positioning pin hole of the left rear connecting plate and the external thread at the rear end of the pin, and a positioning cotter pin of the left rear connecting plate moves through the positioning pin hole of the left rear connecting plate; a rear positioning nut is screwed onto the external thread at the rear end of the pin; the distance between the left front connecting plate and the left rear connecting plate is greater than the width of the upper flange plate of the I-beam.

[0006] A front T-shaped end is provided at the front end of the pre-positioning pin, and a front wire rope threading hole is provided on the front T-shaped end. A front thin and soft steel wire rope is threaded through the front wire rope threading hole. A rear T-shaped end is provided at the rear end of the pre-positioning pin, and a rear wire rope threading hole is provided on the rear T-shaped end. A rear thin and soft steel wire rope is threaded through the rear wire rope threading hole. Left front connecting plate screw holes are arranged in an array on the left front connecting plate, and left rear connecting plate screw holes are arranged in an array on the left rear connecting plate.

[0007] Fixing bolts are inserted between the corresponding screw holes of the left rear connecting plate, the screw holes of the right horizontal I-beam steel beam segment, and the screw holes of the left front connecting plate.

[0008] A positioning method for a positioning fixture used to splice a steel beam between the tops of two T-shaped steel columns, characterized by the following steps: Step 1: Pre-machine the following bolt holes on the ground: the right horizontal I-beam segment connecting bolt holes on the right end web plate, the left end connecting bolt holes on the left end web plate, the left rear connecting plate bolt holes on the left rear connecting plate, and the left front connecting plate bolt holes on the left front connecting plate. After splicing the right horizontal I-beam segment with the I-beam on the ground, clamp the splice joint with the left rear connecting plate and the left front connecting plate, and the bolt holes can be connected together accordingly. The second step is to erect the left and right T-shaped steel columns on the construction site, and set up a splicing space for the I-beams between the right horizontal I-beam segment and the left horizontal I-beam segment. The third step involves inserting the pre-positioning pins and the second pre-positioning pins into the spaced holes in the array of connecting bolt holes on the left end of the I-beam web. Then, a cotter pin is inserted into the rear positioning pin hole of the left end of the I-beam web, and a cotter pin is inserted into the front positioning pin hole of the left end of the I-beam web, positioning the left end of the I-beam web at the center of the pre-positioning pins. Step 4: Movably insert the left front connecting plate positioning cotter pin into the positioning pin hole of the left front connecting plate, and insert the left front connecting plate into the front end of the pre-positioning pin. Thread the front positioning nut onto the external thread of the pin, and position the left front connecting plate at the front end of the pre-positioning pin. Movably insert the left rear connecting plate positioning cotter pin into the positioning pin hole of the left rear connecting plate, and insert the left rear connecting plate into the rear end of the pre-positioning pin. Thread the rear positioning nut onto the external thread of the pin, and position the left rear connecting plate at the rear end of the pre-positioning pin. Use the same method to connect the second pre-positioning pin to the left rear connecting plate and the left front connecting plate. Step 5: Repeat steps 3 and 4 to connect two more connecting plates to the web of the right end of the I-beam, so that the I-beam is pre-positioned on the ground to connect with the four connecting plates. On the outer side of the left end of the I-beam, the left part of the left rear connecting plate and the left part of the left front connecting plate form a left vertical groove, and on the outer side of the right end of the I-beam, a right vertical groove is formed. Step 6: Hoist the I-beam with four positioning plates directly above the I-beam splicing space, so that the left vertical slot is positioned directly above the right end of the right horizontal I-beam segment, and the right vertical slot is positioned directly above the left end of the left horizontal I-beam segment. Step 7: Using hoisting equipment, lower the I-beam and splice it between the right horizontal I-beam segment and the left horizontal I-beam segment to complete the aerial connection of the I-beam. Step 8: Remove the cotter pins from the left front connecting plate, the front cotter pin of the left end web of the I-beam, the rear cotter pin of the left end web of the I-beam, and the cotter pin of the left rear connecting plate. Using the same method, remove all the cotter pins on the second pre-positioning pin post. Using the pre-positioning pin post and the second pre-positioning pin post as guides, push the left rear connecting plate forward to bring it into contact with the web of the I-beam and the right horizontal I-beam segment. Push the left front connecting plate backward to bring it into contact with the web of the I-beam and the right horizontal I-beam segment, thus achieving accurate alignment of the screw holes on the two connecting plates with the screw holes on the web of the right horizontal I-beam segment and the screw holes on the web of the I-beam. Using the same method, align the two connecting plates at the right end of the I-beam to the web of the left horizontal I-beam segment and the web of the I-beam. Step 9: Insert fixing bolts between the corresponding screw holes of the left rear connecting plate, the right horizontal I-beam segment, and the left front connecting plate to fix the I-beam to the right horizontal I-beam segment and the left horizontal I-beam segment together. Step 10: Remove the front and rear positioning nuts, pull out the pre-positioning pins using the thin, soft steel wire rope at the front end, replace them with fixing bolts, and complete the aerial splicing and fixing of the I-beam steel beam.

[0009] This invention can efficiently and quickly connect large-span spliced ​​H-beams to two adjacent T-shaped steel columns, depending on the construction site conditions. The hoisting auxiliary tools for large-span spliced ​​H-beams are easy to manufacture, install, and disassemble, and can achieve pre-positioning and installation of the connecting plates. This avoids parallel movement and frequent disassembly of the connecting plates during installation, and can reliably assemble connecting plates of different sizes on site. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the structure of two adjacent T-shaped steel columns of the present invention; Figure 3 This is a structural schematic diagram of the I-beam 29 of the present invention; Figure 4 This is a diagram showing the fit between the I-beam 29 and the four connecting plates of the present invention; Figure 5 This is a schematic diagram of the pre-positioning pin 8 of the present invention; Figure 6This is a diagram showing the pre-positioning relationship between the pre-positioning pin 8, the I-beam 29, and the two connecting plates of the present invention. Figure 7 This is a structural diagram of the I-beam 29 being hoisted at a high altitude; Figure 8 This is a schematic diagram of the structure after the I-beam 29 is spliced ​​with two T-shaped steel columns. Detailed Implementation

[0011] The present invention will be described in detail below with reference to embodiments: A positioning fixture for splicing a steel beam between the tops of two T-shaped steel columns includes a left T-shaped steel column 1 and a right T-shaped steel column 2. A right horizontal I-beam segment 3 is positioned at the top of the left T-shaped steel column 1. Connecting bolt holes 4 for the right horizontal I-beam segment are arranged in an array on the web of the right end of the right horizontal I-beam segment. A left horizontal I-beam segment 5 is positioned at the top of the right T-shaped steel column 2. Connecting bolt holes 6 for the left horizontal I-beam segment are arranged in an array on the web of the left end of the left horizontal I-beam segment. A positioning fixture is provided between the right horizontal I-beam segment 3 and the left horizontal I-beam segment 5. The I-beam splicing space 7 contains I-beams 29. I-beams 29 are spliced ​​within this space. On the left web of each I-beam 29, left-end connecting screw holes 31 are arranged in an array. On the right web of each I-beam 29, right-end connecting screw holes 32 are arranged in an array. A pre-positioning pin 8 is inserted into one of the arrayed left-end connecting screw holes 31. The front end of the pre-positioning pin 8 has a front-end external thread 9, and the rear end of the pre-positioning pin 8 has a rear-end external thread 23. A pre-positioning pin is positioned between the front-end external thread 9 and the rear-end external thread 23. On the pin post 8, there are respectively provided a positioning pin hole 14 for the left front connecting plate, a positioning pin hole 16 for the front of the left end web of the I-beam, a positioning pin hole 18 for the rear of the left end web of the I-beam, and a positioning pin hole 20 for the left rear connecting plate; between the positioning pin hole 16 for the front of the left end web of the I-beam and the positioning pin hole 18 for the rear of the left end web of the I-beam, the left end web of the I-beam 29 passes through; a front positioning cotter pin 17 for the left end web of the I-beam 29 is movably inserted in the positioning pin hole 16 for the front of the left end web of the I-beam, and a rear positioning cotter pin 19 for the left end web of the I-beam 29 is movably inserted in the positioning pin hole 18 for the rear of the left end web of the I-beam; on the front of the pin post A left front connecting plate 28 passes through the left front connecting plate positioning pin hole 14 between the end external thread 9 and the left front connecting plate positioning pin hole 14. A left front connecting plate positioning cotter pin 15 is movably connected through the left front connecting plate positioning pin hole 14. A front positioning nut 13 is screwed onto the front end external thread 9 of the pin. A left rear connecting plate 27 is provided between the left rear connecting plate positioning pin hole 20 and the rear end external thread 23 of the pin. A left rear connecting plate positioning cotter pin 21 is movably connected through the left rear connecting plate positioning pin hole 20. A rear positioning nut 22 is screwed onto the rear end external thread 23 of the pin. The distance between the left front connecting plate 28 and the left rear connecting plate 27 is greater than the width of the upper flange plate of the I-beam 29.

[0012] A front T-shaped end 10 is provided at the front end of the pre-positioning pin 8, and a front wire rope threading hole 11 is provided on the front T-shaped end 10. A front thin and soft steel wire rope 12 is threaded through the front wire rope threading hole 11. A rear T-shaped end 24 is provided at the rear end of the pre-positioning pin 8, and a rear wire rope threading hole 25 is provided on the rear T-shaped end 24. A rear thin and soft steel wire rope 26 is threaded through the rear wire rope threading hole 25. A left front connecting plate screw hole 34 is arranged in an array on the left front connecting plate 28, and a left rear connecting plate screw hole 33 is arranged in an array on the left rear connecting plate 27.

[0013] Fixing bolts 35 are inserted between the corresponding screw holes 33 on the left rear connecting plate, the screw holes 4 on the right horizontal I-beam segment, and the screw holes 34 on the left front connecting plate. Essentially, this invention involves pre-assembling and positioning the I-beam 29, the left T-shaped steel column 1, and the right T-shaped steel column 2 on the ground. During this process, four pre-positioning pins are used to first position the connecting plate away from the web. Then, the left T-shaped steel column 1 and the right T-shaped steel column 2 are erected on the construction site. Finally, the I-beam 29 with the four pre-positioned connecting plates is hoisted into the air for assembly. This invention creatively introduces the structure and usage method of pre-positioning pins, greatly facilitating the accurate connection between the screw holes on the high-altitude connecting plate and the screw holes on the two webs, thus accelerating the construction progress.

[0014] A positioning method for a positioning fixture used to splice a steel beam between the tops of two T-shaped steel columns, characterized by the following steps: Step 1: Pre-process the following on the ground: right horizontal I-beam segment 3 with arrayed connecting bolt holes 4 on the right web plate; left horizontal I-beam segment 29 with arrayed connecting bolt holes 31 on the left web plate; left rear connecting plate 27 with arrayed connecting bolt holes 33 on the left rear connecting plate; and left front connecting plate 28 with arrayed connecting bolt holes 34 on the left front connecting plate. After splicing the right horizontal I-beam segment 3 and the I-beam 29 on the ground, clamp the splice joint with the left rear connecting plate 27 and the left front connecting plate 28, so that the bolt holes can be connected together accordingly. The second step is to erect the left T-shaped steel column 1 and the right T-shaped steel column 2 on the construction site. An I-beam splicing space 7 is set between the right horizontal I-beam segment 3 and the left horizontal I-beam segment 5. The third step is to pass the pre-positioning pin 8 and the second pre-positioning pin 30 through the intermittent holes in the array of I-beam left-end connecting screw holes 31 on the left-end web of the I-beam 29 on the ground. Then, move the rear positioning cotter pin 19 of the left-end web of the I-beam through the rear positioning pin hole 18, and move the front positioning cotter pin 17 of the left-end web of the I-beam through the front positioning pin hole 16, so that the left-end web of the I-beam 29 is positioned in the middle position of the pre-positioning pin 8. Step 4: Movably insert the left front connecting plate positioning cotter pin 15 into the positioning pin hole 14 of the left front connecting plate, and insert the left front connecting plate 28 into the front end of the pre-positioning pin 8. Screw the front positioning nut 13 onto the external thread 9 at the front end of the pin, and position the left front connecting plate 28 at the front end of the pre-positioning pin 8. Movably insert the left rear connecting plate positioning cotter pin 21 into the positioning pin hole 20 of the left rear connecting plate, and insert the left rear connecting plate 27 into the rear end of the pre-positioning pin 8. Screw the rear positioning nut 22 onto the external thread 23 at the rear end of the pin, and position the left rear connecting plate 28 at the rear end of the pre-positioning pin 8. Using the same method, connect the second pre-positioning pin 30 to the left rear connecting plate 27 and the left front connecting plate 28 together. Fifth step: Repeat the steps of the third and fourth steps to connect two more connecting plates to the web of the right end of the I-beam 29, so that the I-beam 29 is pre-positioned with the four connecting plates on the ground. On the outer left end of the I-beam 29, the left part of the left rear connecting plate 27 and the left part of the left front connecting plate 28 form a left vertical groove 36, and the outer right end of the I-beam 29 forms a right vertical groove 37. Step 6: Hoist the I-beam 29 with four positioning plates directly above the I-beam splicing space 7, so that the left vertical groove 36 is positioned directly above the right end of the right horizontal I-beam segment 3, and the right vertical groove 37 is positioned directly above the left horizontal I-beam segment 5. Step 7: Using hoisting equipment, lower the I-beam 29 and splice it between the right horizontal I-beam segment 3 and the left horizontal I-beam segment 5 to complete the aerial connection of the I-beam 29. Step 8: Remove the left front connecting plate positioning cotter pin 15, the left end web front positioning cotter pin 17, the left end web rear positioning cotter pin 19, and the left rear connecting plate positioning cotter pin 21. Using the same method, remove all positioning cotter pins on the second pre-positioning pin 30. Using the pre-positioning pin 8 and the second pre-positioning pin 30 as guides, push the left rear connecting plate 27 forward horizontally, so that the left rear connecting plate 27 is aligned with the web of the I-beam 29 and the right horizontal I-beam. The I-beam segments 3 are joined together, and the left front connecting plate 28 is pushed backward so that the left front connecting plate 28 is joined with the web of the I-beam 29 and the right horizontal I-beam segment 3, thus achieving accurate alignment of the screw holes on the two connecting plates with the screw holes on the web of the right horizontal I-beam segment 3 and the screw holes on the web of the I-beam 29; in the same way, the two connecting plates at the right end of the I-beam 29 are joined to the web of the left horizontal I-beam segment 5 and the web of the I-beam 29. Step 9: Insert fixing bolts 35 between the corresponding screw holes 33 on the left rear connecting plate, the screw holes 4 on the right horizontal I-beam segment, and the screw holes 34 on the left front connecting plate to fix the I-beam 29 to the right horizontal I-beam segment 3 and the left horizontal I-beam segment 5 together. Step 10: Remove the front positioning nut 13 and the rear positioning nut 22, pull out the pre-positioning pin 8 through the front thin and soft steel wire rope 12, replace it with the fixing bolt 35, and complete the aerial splicing and fixing of the I-beam 29.

Claims

1. A positioning fixture for splicing steel beams between the tops of two T-shaped steel columns, comprising a left T-shaped steel column (1) and a right T-shaped steel column (2), wherein a right horizontal I-beam segment (3) is provided at the top of the left T-shaped steel column (1), and on the web plate at the right end of the right horizontal I-beam segment, connecting bolt holes (4) for the right horizontal I-beam segment are arranged in an array; a left horizontal I-beam segment (5) is provided at the top of the right T-shaped steel column (2), and on the web plate at the left end of the left horizontal I-beam segment, connecting bolt holes (4) for the right horizontal I-beam segment are arranged in an array. The structure includes connecting bolt holes (6) for the left horizontal I-beam segment, and an I-beam splicing space (7) between the right horizontal I-beam segment (3) and the left horizontal I-beam segment (5). Within the I-beam splicing space (7), I-beams (29) are spliced. Connecting bolt holes (31) for the left end of the I-beam (29) are arranged in an array on the left web of the I-beam (29), and connecting bolt holes (32) for the right end of the I-beam (29) are arranged in an array on the right web of the I-beam (29). Its characteristic is that... A pre-positioning pin (8) is inserted into the left end connecting screw hole (31) of an array of I-beams. The pre-positioning pin (8) has a front-end external thread (9) and a rear-end external thread (23). A left front connecting plate positioning pin hole (14) is provided on the pre-positioning pin (8) between the front-end external thread (9) and the rear-end external thread (23). The left end web of the I-beam has a front positioning pin hole (16), a rear positioning pin hole (18), and a positioning pin hole (20) for the left rear connecting plate. Between the front positioning pin hole (16) and the rear positioning pin hole (18) of the left end web of the I-beam, the left end web of the I-beam (29) is threaded through. The front positioning pin hole (16) of the left end web of the I-beam is movably threaded through the front positioning pin hole (16) of the left end web of the I-beam. A cotter pin (17) is movably inserted into the positioning pin hole (18) of the left end web of the I-beam, and a positioning cotter pin (19) of the left end web of the I-beam is inserted into it; a left front connecting plate (28) is inserted between the external thread (9) at the front end of the pin and the positioning pin hole (14) of the left front connecting plate, and a positioning cotter pin (15) of the left front connecting plate is movably inserted into the positioning pin hole (14) of the left front connecting plate, and a front positioning nut is screwed onto the external thread (9) at the front end of the pin. 13) A left rear connecting plate (27) is provided between the positioning pin hole (20) of the left rear connecting plate and the external thread (23) at the rear end of the pin. A positioning cotter pin (21) of the left rear connecting plate is movably connected in the positioning pin hole (20) of the left rear connecting plate. A rear positioning nut (22) is screwed onto the external thread (23) at the rear end of the pin. The distance between the left front connecting plate (28) and the left rear connecting plate (27) is greater than the width of the upper flange plate of the I-beam (29).

2. The positioning fixture for splicing steel beams between the tops of two T-shaped steel columns according to claim 1, characterized in that, A front T-shaped end (10) is provided at the front end of the pre-positioning pin (8), and a front wire rope threading hole (11) is provided on the front T-shaped end (10). A front thin and soft wire rope (12) is threaded through the front wire rope threading hole (11). A rear T-shaped end (24) is provided at the rear end of the pre-positioning pin (8), and a rear wire rope threading hole (25) is provided on the rear T-shaped end (24). A rear thin and soft wire rope (26) is threaded through the rear wire rope threading hole (25). A left front connecting plate screw hole (34) is arranged in an array on the left front connecting plate (28), and a left rear connecting plate screw hole (33) is arranged in an array on the left rear connecting plate (27).

3. A positioning fixture for splicing steel beams between the tops of two T-shaped steel columns according to claim 1 or 2, characterized in that, Fixing bolts (35) are inserted between the corresponding screw holes (33) of the left rear connecting plate, the screw holes (4) of the right horizontal I-beam steel beam segment, and the screw holes (34) of the left front connecting plate.

4. The positioning method for a positioning fixture used to splice a steel beam between the tops of two T-shaped steel columns as described in claim 3, characterized by the following steps: Step 1: Pre-process the following on the ground: the right horizontal I-beam segment (3) has an array of connecting screw holes (4) on the right end web plate; the left end web plate of the I-beam (29) has an array of connecting screw holes (31) on the left end web plate; the left rear connecting plate (27) has an array of connecting screw holes (33) on the left rear connecting plate (27) and the left front connecting plate (28) has an array of connecting screw holes (34) on the left front connecting plate (28). After splicing the right horizontal I-beam segment (3) and the I-beam (29) on the ground, the screw holes can be connected in a corresponding manner after clamping the splice joint with the left rear connecting plate (27) and the left front connecting plate (28). The second step is to erect the left T-shaped steel column (1) and the right T-shaped steel column (2) on the construction site. An I-shaped steel beam splicing space (7) is set between the right horizontal I-shaped steel beam segment (3) and the left horizontal I-shaped steel beam segment (5). Step 3: On the ground, insert the pre-positioning pin (8) and the second pre-positioning pin (30) into the holes spaced apart in the array of I-beam left-end connecting screw holes (31) on the web of the left end of the I-beam (29). Move the cotter pin (19) in the rear positioning pin hole (18) of the web of the left end of the I-beam, and move the cotter pin (17) in the front positioning pin hole (16) of the web of the left end of the I-beam, positioning the web of the left end of the I-beam (29) in the middle position of the pre-positioning pin (8). Step 4: Move the left front connecting plate positioning cotter pin (15) through the positioning pin hole (14) of the left front connecting plate, and pass the left front connecting plate (28) through the front end of the pre-positioning pin (8). Thread the front positioning nut (13) onto the external thread (9) at the front end of the pin, and position the left front connecting plate (28) at the front end of the pre-positioning pin (8). Move the left rear connecting plate positioning cotter pin (21) through the positioning pin hole (20) of the left rear connecting plate, and pass the left rear connecting plate (27) through the rear end of the pre-positioning pin (8). Thread the rear positioning nut (22) onto the external thread (23) at the rear end of the pin, and position the left rear connecting plate (27) at the rear end of the pre-positioning pin (8). Use the same method to connect the second pre-positioning pin (30) to the left rear connecting plate (27) and the left front connecting plate (28). Fifth step: Repeat the steps of the third and fourth steps, connect two more connecting plates to the web plate at the right end of the I-beam (29), so that the I-beam (29) is pre-positioned with the four connecting plates on the ground, and form a left vertical groove (36) on the left side of the left end of the I-beam (29), with the left part of the left rear connecting plate (27) and the left part of the left front connecting plate (28), and a right vertical groove (37) on the right side of the I-beam (29). Step 6: Hoist the I-beam (29) with four positioning plates to the top of the I-beam splicing space (7), so that the left vertical groove (36) is positioned directly above the right end of the right horizontal I-beam segment (3), and the right vertical groove (37) is positioned directly above the left end of the left horizontal I-beam segment (5). Step 7: Using hoisting equipment, lower the I-beam (29) and splice it between the right horizontal I-beam segment (3) and the left horizontal I-beam segment (5) to complete the aerial connection of the I-beam (29); Step 8: Remove the left front connecting plate positioning cotter pin (15), the front positioning cotter pin (17) of the left end web of the I-beam, the rear positioning cotter pin (19) of the left end web of the I-beam, and the left rear connecting plate positioning cotter pin (21). Using the same method, remove all the positioning cotter pins on the second pre-positioning pin (30). Using the pre-positioning pin (8) and the second pre-positioning pin (30) as guides, push the left rear connecting plate (27) forward horizontally, so that the left rear connecting plate (27) is aligned with the web of the I-beam (29) and the right horizontal I-beam. The I-beam segments (3) are joined together, and the left front connecting plate (28) is pushed backward so that the left front connecting plate (28) is joined with the web of the I-beam (29) and the right horizontal I-beam segment (3), thus achieving accurate alignment of the screw holes on the two connecting plates with the screw holes on the web of the right horizontal I-beam segment (3) and the screw holes on the web of the I-beam (29); in the same way, the two connecting plates at the right end of the I-beam (29) are joined to the web of the left horizontal I-beam segment (5) and the web of the I-beam (29); Step 9: Insert fixing bolts (35) between the corresponding left rear connecting plate screw holes (33), right horizontal I-beam segment connecting screw holes (4) and left front connecting plate screw holes (34) to fix the I-beam (29) to the right horizontal I-beam segment (3) and the left horizontal I-beam segment (5). Step 10: Remove the front positioning nut (13) and the rear positioning nut (22), pull out the pre-positioning pin (8) through the front thin and soft steel wire rope (12), replace it with the fixing bolt (35), and complete the aerial splicing and fixing of the I-beam (29).

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