Round pile portal steel structure segmented manufacturing process

Abstract

The invention relates to a segmented manufacturing process for a round pile portal steel structure, which comprises the following steps of: dividing a portal into a group segment I, a group segment II, a group segment III and a group segment IV according to inflection point positions, and processing and manufacturing the group segment I, the group segment II, the group segment III and the group segment IV; a simple ground sample line is drawn out, a second group section and a third group section of the first portal frame are hung, and the outer sides and the inner sides of the second group section and the third group section are subjected to spot welding correspondingly; drawing out an integral ground sample line; the first group section and the fourth group section of the first portal frame are hoisted and placed, and spot welding is carried out; performing full-length welding on each group section of the first portal frame; the second group section and the third group section of the second portal frame are hung on the first portal frame, and the outer sides and the inner sides of the second group section and the third group section are subjected to spot welding; the first group section and the fourth group section of the second portal frame are hoisted and placed, and spot welding is carried out; all assembly sections of the second portal are subjected to full-length welding; connecting plates are spot-welded to the designated positions of the door frames, then drilling is conducted on the connecting plates, then the connecting plates are dismantled, and the door frames are dismantled and cut according to the designated positions. According to the invention, the portal frame is re-sectioned and manufactured, so that the dimensional precision of the whole portal frame can be improved.

Description

Technical Field

[0001] The invention relates to the technical field of circular stacker-reclaimers, and in particular to a segmented manufacturing process for a circular stacker gantry steel structure. Background Art

[0002] The circular stacker-reclaimer is a continuous stacker-reclaimer used in a closed spherical material shed, which can achieve efficient, environmentally friendly and automated material handling and stacking. The gantry steel structure of the circular stacker-reclaimer is an important part of the reclaiming function, responsible for supporting the scraper reclaimer and also the fulcrum for the pitch of the scraper reclaimer.

[0003] The performance of the gantry steel structure directly affects the stable operation of the scraper and even the whole machine. The gantry steel structure adopts a box-shaped double-beam structure, that is, the gantry is composed of two single beams of the same structure. The two single beams are arranged side by side and connected together by a certain structure. Each single beam structure of the gantry is as follows: Figure 1 shown.

[0004] When manufacturing the portal steel structure, the single beam adopts a box beam, and the cross section of the box beam is as follows: Figure 2 As shown, it includes a bottom plate, a cover plate and a web plate in a rectangular shape and a plurality of partitions arranged in the rectangular space. The door frame is assembled by door frame 1, door frame 2, door frame 3, door frame 4 and door frame 5. Figure 3 As shown, gantry one is the track end, connected to the circular track on the wall of the circular material yard through a walking device, and gantry five is the center column end, connected to the center column of the circular stacker and reclaimer through a slewing bearing.

[0005] In this case, it is necessary to cut and manufacture the sections according to the above-mentioned section nodes. A whole box beam is cut and then made into door frame 1, door frame 2, door frame 3, door frame 4 and door frame 5, and then transported to the site for assembly. The assembly uses connecting plates, such as Figure 4 As shown. The two adjacent sections of the portal frame are connected and fixed by the connecting plate in the form of flange connection. There are multiple connecting plates of this type at each assembly node, and the multiple connecting plates are surrounded by a rectangular shape. The flange connection here means that holes are punched on both sides of the connecting plate, and holes are also punched at the end of the portal frame at each assembly node. The corresponding holes are connected by bolts, thereby connecting the connecting plate and the two adjacent sections of the portal frame.

[0006] It can be seen that since the gantry is divided into four straight sections, the length of each straight section of the gantry is a key dimension, which is represented by X1, X2, X3 and X4 respectively. This key dimension needs to be strictly inspected. A connecting plate is arranged on each straight section, and the connecting plate corresponds to the disconnection position of each section of the gantry, and then each straight section must be cut and disconnected. In this way, each straight section of the gantry can be made of an integral box beam, but now the box beam must be disconnected and each section of the gantry must be made separately, and the box beam must be bent and flange holes drilled before being assembled.

[0007] Since each section of the portal frame is made separately, it is inevitable that there will be precision errors. When each section of the portal frame is assembled, the sum of the precision errors will become larger, and then the key dimensions will change greatly. Therefore, the portal frame at the connecting plate needs to be adjusted, repaired and cut to make the flange hole position meet the requirements of the drawing before connecting them together with the connecting plate. This manufacturing process has the problem of low assembly precision. Summary of the invention

[0008] In order to solve the problem of low assembly precision of the portal frame after being formed according to the conventional manufacturing process, the present invention provides a segmented manufacturing process of the round pile portal frame steel structure, which uses an integral box beam to manufacture each segment of the portal frame. After the multi-segment portal frame is manufactured, it is first assembled and paired, holes are drilled according to the position of the connecting plates, and then the portal frame is divided according to the node positions and assembled after being transported to the site, thereby ensuring high dimensional precision.

[0009] To achieve the above purpose, the technical solution adopted by the present invention is: The segmented manufacturing process of the round pile portal steel structure includes the following steps: Step 1. According to the structure and stress characteristics of the portal frame steel structure, the portal frame is segmented according to the inflection point position, and is divided into four straight segments, segment 1, segment 2, segment 3 and segment 4, which is conducive to improving the processing accuracy; segments 1 to 4 are processed and manufactured according to the requirements of the design drawings, and assembled after the production is completed and passed the inspection; Step 2: Draw a simple sample line at the assembly site, place the cushion blocks according to the sample line, and hang the second and third sections of the first gantry on the cushion blocks. After checking that the assembly dimensions of the second and third sections are qualified, spot weld the outer and inner sides of the second and third sections respectively; Step 3: Draw the overall ground sample line on the basis of the simple sample line, and trim the manufacturing margins of the group one and group three; after placing the pads again according to the ground sample line, hang the group one and group four of the first portal frame, and refer to step 2 to operate the spot welding of group one and group two, group three and group four, so as to facilitate the preliminary fixation of the four groups of the first portal frame by spot welding; Step 4: Ensure the gaps at the joints of each segment according to the design drawings, arrange the z-direction force plates in the gaps, fully weld the joints of each segment of the first portal frame, and complete the full welding and fixation of the four segments in the first portal frame; Step 5, hoist the second and third sections of the second gantry onto the first gantry in a corresponding stacking manner, spot weld the outer and inner sides of the second and third sections of the second gantry with reference to steps 2 and 3, and repair the manufacturing margin; then hoist the first and fourth sections of the second gantry onto the first gantry, spot weld the first and second sections, third and fourth sections of the second gantry; finally, refer to step 4 to perform full welding of each section of the second gantry; Step 6. Lift the second gantry from the first gantry, spot weld the connecting plate at the designated position of the first gantry according to the design drawings, drill holes in the connecting plate, and require the holes to penetrate the gantry. Then remove the connecting plate, and then disassemble and cut the first gantry at the designated position to form the existing gantry segment structure; refer to the disassembly operation of the first gantry to disassemble and cut the second gantry.

[0010] Furthermore, in step 1, the inflection point of the gantry is a bending position, and there are three inflection points of the gantry, namely, inflection point a, inflection point b and inflection point c. The three inflection points divide the gantry into segment one, segment two, segment three and segment four in sequence, and segments one to four are all straight box beam structures.

[0011] Furthermore, in step 2, the simple ground sample line is the ground sample line of segment two and segment three; after leveling, the outer sides of segment two and segment three are spot welded, and then according to the center line of segment three, the size of segment two is checked, and after passing the test, the inner sides of segment two and segment three are spot welded.

[0012] Furthermore, the leveling is used to check the elevation and straightness of the segments 2 and 3; if there is an error in the size of the segment 2 being checked, the position of the segment 2 is fine-tuned until the size is qualified.

[0013] Furthermore, in step 3, the overall ground sample line includes the ground sample lines of segments one to four; segments one and three are reserved with manufacturing allowances during manufacturing, and the manufacturing allowances are repair allowances. After repair, segments one and three meet the key size requirements of two straight sections of the portal frame.

[0014] Furthermore, in step 3, after leveling, the outer sides of segment 2 and segment 1 are spot welded, and then the size of segment 1 is checked according to the center line of segment 2. If there is an error, the position of segment 1 is fine-tuned. After the size is qualified, the inner sides of segment 2 and segment 1 are spot welded; repeat the operation to spot weld the outer and inner sides of segment 3 and segment 4.

[0015] Furthermore, in step 4, there are three splicing nodes between segments one to four, the number of z-direction force plates is three, and the two adjacent segments in the first gantry are fully welded to the z-direction force plates, and the splicing node positions of segments one and two, segment two and segment three, and segment three and segment four are fully welded.

[0016] Further, in step 5, after the segments 2 and 3 of the second gantry are hoisted, they correspond to the segments 2 and 3 of the first gantry up and down; after the segments 1 and 4 of the second gantry are hoisted, they correspond to the segments 1 and 4 of the first gantry up and down.

[0017] Furthermore, in step 6, after the two gantries are disassembled, five segmented structures of the existing gantries are formed, and then they are transported to the project construction site, and the overall structure of the gantries is assembled according to the precise position of the connecting plates, and then the connecting plates and the gantries steel structure are fixed by connecting plates and high-strength bolts, nuts and washers.

[0018] Through the above technical solution, the beneficial effects of the present invention are: The present invention optimizes the existing door frame manufacturing process. In the existing door frame manufacturing, the five door frame sections are manufactured separately, and some door frames need to be bent, and holes need to be drilled at the joints of each door frame section to facilitate the subsequent connection with the connecting plate flange. Since each door frame section is manufactured separately, it is inevitable that there will be precision errors after manufacturing. When assembling, the errors of each door frame section will be added up, resulting in the difficulty in ensuring the key dimensional accuracy of each straight section of the door frame and the difficulty in aligning the connecting plate.

[0019] Based on this, the present invention divides the portal frame into four straight sections according to the structure and stress characteristics, namely, section one to section four. Sections one to section four are all straight structures, and each section can meet the key dimensional accuracy requirements of each straight section of the portal frame during production. After section one is processed and manufactured, it includes the original portal frame one and portal frame two. After section three is processed and manufactured, it includes the original portal frame three and portal frame four, thus reducing an accuracy error. After each section of the portal frame is fully welded and fixed, the connecting plate is spot welded when not cut, and then drilled and punched. The connecting plate and the portal frame are punched together. After drilling, the connecting plate is removed, and the portal frame is cut to ensure that the holes are not misaligned, to ensure the accuracy of the holes, and to facilitate the installation of the connecting plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the structure of each single beam of the portal frame.

[0021] Figure 2 It is the cross-sectional view of each single beam of the portal frame.

[0022] Figure 3 This is a schematic diagram of the gantry segment production status.

[0023] Figure 4This is a schematic diagram of the split state in which each section of the portal frame is connected by a connecting plate flange.

[0024] Figure 5 It is a schematic diagram of the inflection point distribution state in step 1 of the segmented manufacturing process of the round pile portal frame steel structure of the present invention.

[0025] Figure 6 It is a schematic diagram of the segmented arrangement of the portal frame in step 1 of the segmented manufacturing process of the round pile portal frame steel structure of the present invention.

[0026] Figure 7 It is a schematic diagram of the assembly state of segment two and segment three in step 2 of the segmented manufacturing process of the round pile portal frame steel structure of the present invention.

[0027] Figure 8 It is a schematic diagram of the spot welding fixing state of the first gantry in step 3 of the segmented manufacturing process of the round pile gantry steel structure of the present invention.

[0028] Fig. 9 It is a schematic diagram of the fully welded fixed state of the first gantry in step 4 of the segmented manufacturing process of the round pile gantry steel structure of the present invention.

[0029] Fig.10 It is a schematic diagram comparing the portal frame assembly dimension data before and after the process optimization of the round pile portal frame steel structure segmented manufacturing process of the present invention.

[0030] Fig.11 It is a schematic diagram comparing the external dimension data of the gantry before and after the process optimization of the segmented manufacturing process of the round pile gantry steel structure of the present invention.

[0031] The numbers in the accompanying drawings are: 1 bottom plate, 2 cover plate, 3 web plate, 4 partition plate, 51 door frame one, 52 door frame two, 53 door frame three, 54 door frame four, 55 door frame five, 6 connecting plate, 71 group segment one, 72 group segment two, 73 group segment three, 74 group segment four, 8z-direction force-bearing plate. DETAILED DESCRIPTION

[0032] The specific implementation of the present invention is described in detail below with reference to the accompanying drawings: like Figure 5~Figure 9 As shown in the figure, the segmented manufacturing process of the round pile portal frame steel structure includes the following steps: Step 1: According to the structure and stress characteristics of the portal frame steel structure, the portal frame is divided into sections according to the inflection point position. The inflection point position of the portal frame is the bending position. There are three inflection points of the portal frame, namely, inflection point a, inflection point b and inflection point c. Figure 5 As shown; the inflection point is also the tensile stress point of the door frame.

[0033] The three inflection points of the gantry divide the gantry into four straight segments 1 71, 2 72, 3 73 and 4 74, that is, the three inflection points divide the gantry into segments 1 71, 2 72, 3 73 and 4 74, and segments 1 71 to 4 74 are all straight box beam structures. Figure 6 The lengths of the third segment 73, the first segment 71, the fourth segment 74 and the second segment 72 decrease in sequence, and the four segments are all in a straight state, which is conducive to ensuring the dimensional accuracy of each straight segment of the portal frame.

[0034] According to the design drawings, segment 1 71 to segment 4 74 are processed and manufactured. Since segment 1 71 and segment 3 73 are relatively long, manufacturing margins are reserved for segment 1 71 and segment 3 73 during manufacturing to facilitate cutting and repairing in subsequent operations. After the manufacturing is completed and qualified, they are assembled, and the a inflection point, b inflection point and c inflection point are respectively used as assembly nodes.

[0035] It should be noted that since the portal frame is composed of two single beams with the same structure, a first portal frame and a second portal frame need to be manufactured. The two portal frames can be regarded as two single beams, and both portal frames include segment one 71 to segment four 74.

[0036] Step 2: Draw a simple sample line at the assembly site. The simple sample line is the sample line of segment 2 72 and segment 3 73. Place the cushion blocks according to the indication of the sample line, and successively hang the segment 2 72 and segment 3 73 of the first gantry on the cushion blocks for assembly. After assembly, check whether the assembly dimensions of segment 2 72 and segment 3 73 are qualified. If qualified, spot weld the outer side and inner side of segment 2 72 and segment 3 73 respectively. Figure 7 shown.

[0037] Specifically, after leveling, that is, after checking the elevation and straightness of the second segment 72 and the third segment 73, spot weld the outer sides of the second segment 72 and the third segment 73. Then, according to the center line of the third segment 73, check the size of the second segment 72. If there is an error in the size of the second segment 72, fine-tune the position of the second segment 72 until the size is qualified. After the size is qualified, spot weld the inner sides of the second segment 72 and the third segment 73.

[0038] Step 3: Draw the overall ground sample line based on the simple sample line, which includes the ground sample lines of segment 1 71 to segment 4 74. Trim the manufacturing allowance of segment 1 71 and segment 3 73, which is the repair amount. After trimming, segment 1 71 and segment 3 73 meet the key size requirements of two straight sections of the portal frame.

[0039] According to the ground sample line indication, place the pads again and then hoist the first gantry segment 1 71 and segment 4 74. According to the design drawings, grooves are opened at the assembly nodes of segment 1 71, segment 2 72, segment 3 73 and segment 4 74 to facilitate subsequent welding operations. Refer to step 2 to spot weld segment 1 71 and segment 2 72, segment 3 73 and segment 4 74. On the basis of spot welding and fixing segment 2 72 and segment 3 73, after hoisting segment 1 71 and segment 4 74, spot weld and fix segment 1 71 and segment 2 72, segment 3 73 and segment 4 74.

[0040] Specifically, after leveling, spot weld the outer sides of the second segment 72 and the first segment 71, and then check the size of the first segment 71 according to the center line of the second segment 72. If there is an error, fine-tune the position of the first segment 71. After the size is qualified, spot weld the second segment 72 and the inner side of the first segment 71; repeat the above operation to spot weld the outer and inner sides of the third segment 73 and the fourth segment 74, and the spot welding fixation of the four segments in the first gantry is completed. Figure 8 shown.

[0041] Step 4: Ensure the gaps at the joints of each segment according to the design drawings, that is, during the process of hanging and spot welding the four segments, pay attention to leaving a gap between two adjacent segments, and arrange the z-direction force-bearing plate 8 in the gap. Since there are three joints between segment 1 71 to segment 4 74, the number of z-direction force-bearing plates 8 is three.

[0042] The joint nodes of each segment of the first portal frame are fully welded, that is, the joint nodes of segment 1 71 and segment 2 72, segment 2 72 and segment 3 73, and segment 3 73 and segment 4 74. The adjacent segments in the first portal frame are fully welded to the z-direction force plate 8, such as Fig. 9 As shown, the full welding and fixing of the four segments in the first gantry is completed.

[0043] Step 5: After the first door frame is assembled and fixed, the assembly of the second door frame is started based on the various sections in the first door frame. The second door frame's section 2 72 and section 3 73 are hoisted onto the first door frame in a stacking manner. After the second door frame's section 2 72 and section 3 73 are hoisted, they correspond to the first door frame's section 2 72 and section 3 73. Referring to steps 2 and 3, spot weld the outer and inner sides of the second door frame's section 2 72 and section 3 73, and repair the manufacturing allowance.

[0044] Then, the second gantry segment 1 71 and segment 4 74 are hoisted onto the first gantry. After the second gantry segment 1 71 and segment 4 74 are hoisted, they correspond to the first gantry segment 1 71 and segment 4 74. Spot weld the second gantry segment 1 71 and segment 2 72, segment 3 73 and segment 4 74; finally, refer to step 4 to fully weld each segment of the second gantry, and the full welding and fixing of the four segments in the second gantry is completed. At this time, the first gantry and the second gantry are stacked up and down, and the assembly size and angle are consistent, so the first gantry and the second gantry have the same structure and size, meeting the requirements of two single beams with the same structure.

[0045] Step 6: Lift the second gantry from the first gantry and disassemble the two gantry. The disassembly of the first gantry is as follows: spot weld the connecting plate 6 at the designated position of the first gantry according to the design drawing, arrange one connecting plate 6 on each of the group 1 71 and the group 2 72, and arrange two connecting plates 6 on the group 3 73. Then drill holes in the connecting plate 6, requiring the holes to penetrate the gantry, remove the connecting plate 6, and then disassemble and cut the first gantry according to the designated position. The designated position here is as follows: Figure 3 The disconnected position shown forms the existing gantry segment structure, and further forms the existing gantry 1 to gantry 5. The second gantry is disassembled and cut with reference to the disassembly operation of the first gantry.

[0046] After the two gantries are disassembled, five segmented structures of the existing gantries are formed respectively. Then, after being transported to the project construction site, the overall structure of the gantries is assembled according to the precise position of the connecting plate 6, and then the connecting plate 6 and high-strength bolts, nuts and washers are used to fix the connecting plate 6 and the gantries steel structure.

[0047] In order to prove the effect of the process of the present invention, the following comparative test was conducted: the assembly size of the door frame after the conventional manufacturing process was tested, and the assembly size of the door frame after the optimized segmented manufacturing process was tested, and two sets of assembly size test data before and after the manufacturing process optimization were obtained, as shown in FIG. Fig.10 By comparing the before and after data, it can be seen that the dimensional accuracy of the gantry structure using the segmented manufacturing process is much higher than that of the conventionally manufactured gantry, with an accuracy improvement of about 50%.

[0048] At the same time, the external dimensions of the gantry before and after the manufacturing process optimization are tested to obtain two sets of external dimension test data, such as Fig.11 By comparing the before and after data, it can be seen that the use of segmented manufacturing technology has greatly reduced the stress concentration problem caused by the large welding workload during the welding process, so that the welding deformation is well controlled and the dimensional accuracy of the portal frame structural components is significantly improved.

[0049] The embodiments described above are only preferred embodiments of the present invention and are not intended to limit the scope of implementation of the present invention. Therefore, any equivalent changes or modifications made according to the structures, features and principles described in the patent scope of the present invention should be included in the scope of the patent application of the present invention.

Claims

1. The segmented manufacturing process of the round pile gantry steel structure is characterized by: The steps include: Step 1: According to the structure and stress characteristics of the portal frame steel structure, the portal frame is segmented according to the inflection point position, and is sequentially divided into four straight segments, namely, segment 1 (71), segment 2 (72), segment 3 (73) and segment 4 (74); segments 1 (71) to segment 4 (74) are processed and manufactured according to the requirements of the design drawings, and assembled after the manufacturing is completed and passed the inspection; Step 2: Draw a simple sample line at the assembly site, place the cushion blocks according to the sample line, and hang the second segment (72) and the third segment (73) of the first gantry onto the cushion blocks. After checking that the assembly dimensions of the second segment (72) and the third segment (73) are qualified, spot weld the outer side and the inner side of the second segment (72) and the third segment (73) respectively; Step 3: Draw the overall ground sample line on the basis of the simple sample line, and trim the manufacturing margins of segment 1 (71) and segment 3 (73); after placing the pads again according to the ground sample line, hoist the first gantry segment 1 (71) and segment 4 (74), and refer to step 2 to spot weld segment 1 (71) and segment 2 (72), segment 3 (73) and segment 4 (74); Step 4: Ensure the gaps at the joints of each segment according to the design drawing requirements, arrange the z-direction force-bearing plates (8) in the gaps, and fully weld the joints of each segment of the first portal frame; Step 5: hoist the second gantry segment 2 (72) and the third gantry segment 3 (73) onto the first gantry in a stacking manner, spot weld the outer and inner sides of the second gantry segment 2 (72) and the third gantry segment 3 (73) with reference to steps 2 and 3, and repair the manufacturing margin; then hoist the second gantry segment 1 (71) and the fourth gantry segment 4 (74) onto the first gantry, spot weld the second gantry segment 1 (71) and the second gantry segment 2 (72), the third gantry segment 3 (73) and the fourth gantry segment 4 (74); finally, refer to step 4 to fully weld all the segments of the second gantry; Step 6, lift the second gantry from the first gantry, spot weld the connecting plate (6) at the designated position of the first gantry according to the design drawing, then drill holes in the connecting plate (6) to penetrate the gantry, remove the connecting plate (6), and then disassemble and cut the first gantry at the designated position to form the existing gantry segment structure; refer to the disassembly operation of the first gantry to disassemble and cut the second gantry.

2. The segmented manufacturing process of the round pile portal frame steel structure according to claim 1 is characterized in that: In step 1, the inflection point of the portal frame is a bending position. There are three inflection points of the portal frame, namely, inflection point a, inflection point b and inflection point c. The three inflection points divide the portal frame into segment one (71), segment two (72), segment three (73) and segment four (74) in sequence. Segments one (71) to segment four (74) are all straight box beam structures.

3. The segmented manufacturing process of the round pile portal frame steel structure according to claim 1 is characterized in that: In step 2, the simple ground sample line is the ground sample line of segment two (72) and segment three (73); after leveling, spot weld the outer sides of segment two (72) and segment three (73), and then spot weld the inner sides of segment two (72) and segment three (73) according to the center line of segment three (73) and the size of segment two (72).

4. The segmented manufacturing process of the round pile portal steel structure according to claim 3 is characterized in that: The leveling is to check the elevation and straightness of the second segment (72) and the third segment (73); if there is an error in the size of the second segment (72) under inspection, the position of the second segment (72) is fine-tuned until the size is qualified.

5. The segmented manufacturing process of the round pile portal steel structure according to claim 1 is characterized in that: In step 3, the overall ground sample line includes the ground sample lines of segment one (71) to segment four (74); segment one (71) and segment three (73) are reserved with manufacturing allowances during manufacturing, and the manufacturing allowances are the repair allowances. After the repairs, segment one (71) and segment three (73) meet the key size requirements of two straight sections of the portal frame.

6. The segmented manufacturing process of the round pile portal frame steel structure according to claim 4 is characterized in that: In step 3, after leveling, spot weld the outer sides of the second segment (72) and the first segment (71), and then check the size of the first segment (71) according to the center line of the second segment (72). If there is an error, fine-tune the position of the first segment (71). After the size is qualified, spot weld the inner sides of the second segment (72) and the first segment (71); repeat the spot welding operation for the outer and inner sides of the third segment (73) and the fourth segment (74).

7. The segmented manufacturing process of the round pile portal frame steel structure according to claim 1 is characterized in that: In step 4, there are three splicing nodes between segment 1 (71) and segment 4 (74), the number of z-direction force plates (8) is three, and the two adjacent segments in the first portal frame are fully welded to the z-direction force plates (8), and the splicing node positions of segment 1 (71) and segment 2 (72), segment 2 (72) and segment 3 (73), and segment 3 (73) and segment 4 (74) are fully welded.

8. The segmented manufacturing process of the round pile portal frame steel structure according to claim 1 is characterized in that: In step 5, after the second gantry segment 2 (72) and the third gantry segment 3 (73) are hoisted, they correspond vertically to the first gantry segment 2 (72) and the third gantry segment 3 (73); after the second gantry segment 1 (71) and the fourth gantry segment 4 (74) are hoisted, they correspond vertically to the first gantry segment 1 (71) and the fourth gantry segment 4 (74).

9. The segmented manufacturing process of the round pile portal frame steel structure according to claim 1 is characterized in that: In step 6, after the two portal frames are disassembled, five segmented structures of the existing portal frame are formed, and then after being transported to the project construction site, the overall structure of the portal frame is assembled according to the precise position of the connecting plate (6), and then the connecting plate (6) and the portal frame steel structure are fixed by the connecting plate (6) and high-strength bolts, nuts and washers.

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