Corrugated steel web I-shaped section and steel box composite beam manufacturing method

Abstract

The invention discloses a corrugated steel web I-shaped section and a manufacturing method of a steel box composite beam, and relates to the technical field of steel box composite beams. The rod piece web I-shaped piece is installed on the side face of the bottom plate unit; the partition plate type web I-shaped pieces are installed on the side faces of the bottom plate units, and the partition plate type web I-shaped pieces are connected with the rod piece web I-shaped pieces; the solid-web type partition plate units are installed on the bottom plate units, and the solid-web type partition plate units are arranged between the partition plate type web I-shaped pieces; the truss type partition plate units are installed on the bottom plate units, and the truss type partition plate units are arranged between the rod piece web I-shaped pieces. The manufacturing method of the steel box composite beam comprises the steps that the bottom plate units, the web I-shaped pieces and the partition plate units are transported to a site to be erected, assembled and welded. The technical problem that in the prior art, a concrete bottom plate and corrugated steel web structure cannot meet the requirement for a large-span bridge is solved.

Description

Technical Field

[0001] This invention relates to the field of steel box girder technology, and in particular to a corrugated steel web I-shaped segment and a method for manufacturing a steel box girder. Background Technology

[0002] Research on corrugated web steel box girder bridges began in my country in the 20th century. More than 200 bridges have been built domestically, with over 90% featuring corrugated webs and concrete top and bottom slabs. The vast majority of these bridges have spans less than 150 meters. Traditional corrugated web structures consist only of welding the web to the upper flange, and the web height is generally below 4000 mm, making processing relatively easy. Therefore, traditional manufacturing processes only control the forming accuracy of the corrugated web and the accuracy after welding it to the upper flange.

[0003] However, for bridges with corrugated steel webs and main spans exceeding 150m, the material limitations and cost-effectiveness of conventional concrete base plates with corrugated steel webs cannot meet the requirements. Summary of the Invention

[0004] The purpose of this invention is to provide a method for manufacturing corrugated steel web I-shaped segments and steel box girder, which solves the technical problem that the existing concrete base plate plus corrugated steel web structure cannot meet the requirements of large-span bridges.

[0005] This application discloses a corrugated steel web I-section segment, including: Base plate unit; A rod web I-shaped component is installed on the side of the base plate unit; A partition-type web plate formwork is installed on the side of the bottom plate unit, and the partition-type web plate formwork is connected to the rod web plate formwork. A solid-web partition unit is installed on the base plate unit, and the solid-web partition unit is disposed between the partition-type web plate I-beams; A truss-type partition unit is installed on the base plate unit, and the truss-type partition unit is arranged between the I-beams of the bar web.

[0006] This application reduces the concrete pouring process of the foundation slab by using a foundation slab unit (steel foundation slab) instead, which helps to reduce the self-weight of the bridge, enabling the bridge to achieve a larger span, and improving the accuracy and efficiency of beam erection. At the same time, dividing the beam into the above-mentioned structures reduces the number of on-site erection components and promotes modular construction, which helps to improve on-site erection accuracy and construction efficiency.

[0007] Based on the above technical solution, the present application can be further improved as follows: Furthermore, the web profile of the rod includes: Bottom panel of the rod; The corrugated web of the rod is vertically installed on the bottom panel of the rod; Angle steel members are installed on the inner side of the corrugated web of the member; The upper flange plate of the rod is installed on the top of the corrugated web of the rod; The partition-type web plate formwork includes: Partition-type bottom panel; A diaphragm-type corrugated web is vertically installed on the diaphragm-type bottom panel shown. A diaphragm is installed on the inner wall of the diaphragm-type corrugated web. The diaphragm-type upper flange plate is installed on the top of the diaphragm-type corrugated web plate. The beneficial effect of this step is that by reasonably dividing the corrugated steel web plate and the steel box combined beam, the components that control the dimensional accuracy of the main structure are divided together to form a web plate I-beam composed of the above structure, which reduces the complexity of subsequent construction.

[0008] Furthermore, there are two rod web I-beams, and the rod web I-beams are installed in parallel on both sides of the bottom plate unit; the angle steel members of the two rod web I-beams are combined to form an X-shaped support, and multiple spacer members are installed between the two rod web I-beams; There are two diaphragm-type web plate I-beams, and the diaphragm-type web plate I-beams are arranged in parallel on both sides of the bottom plate unit. The advantage of this step is that the symmetrical arrangement of the web plate I-beams is more conducive to controlling the bridge erection alignment and mutual correction.

[0009] This application also discloses a method for manufacturing a steel box girder, wherein the corrugated web steel box girder comprises multiple corrugated steel web I-shaped segments, including the following steps: S1: Fabricate the base plate unit; S2: The web plate I-beam is manufactured using a continuous matching manufacturing method. The web plate I-beam is divided into rod-type web plate I-beam and partition-type web plate I-beam. S3: A load-bearing matching component is configured on the web plate I-beam; S4: Fabricate partition units, which are divided into solid-web partition units and truss partition units; S5: Transport the base plate unit, web plate I-beam and partition plate unit to the site for erection, splicing and welding to complete the fabrication of the steel box girder.

[0010] Based on the above technical solution, the present application can be further improved as follows: Furthermore, the specific content of step S2 is as follows: S201: Select a tire rack platform; S202: The first qualified web plate part is used as the reference part for positioning on the jig platform; S203: Starting from the reference I-beam, perform continuous matching assembly; the continuous matching assembly is performed with two web I-beams as one assembly round, and the I-beams are welded sequentially in the same span, the same section, and the same side, while controlling the ring size and the misalignment of the plate edge at the interface during the welding process. S203: After completing an assembly round, retain the second web plate I-beam of that round as the reference I-beam for the next assembly round, and repeat S202 until all web plate I-beams are assembled and manufactured.

[0011] Furthermore, in step S2, if the height of the corrugated web in the web formwork is less than 4 meters, it is made by continuous molding; if the height is not less than 4 meters, it is made by single-wave segmentation and single-wave molding. After processing, it is welded and spliced ​​to form the corrugated web.

[0012] Furthermore, the specific content of step S3 is as follows: Step S301: Two sets of plate-type load-bearing matching parts are arranged at the annular positions of the upper flange plate and the bottom plate of the web plate I-shaped part, respectively. Each set of matching parts achieves the positioning and connection of the annular seam through a fixed core plate and a connecting plate. Step S302: Five sets of L-shaped load-bearing matching parts are arranged on each vertical joint of the corrugated steel web of the web I-beam. Each set of matching parts is positioned and connected to the vertical joint through L-shaped welding parts.

[0013] Furthermore, in step S301, the fixing core plate is symmetrically arranged with two bolt holes with a diameter of not less than 34mm and two punch holes with a diameter of not less than 26mm, through which M24 high-strength bolts and φ26mm punches are respectively inserted. In step S302, the length of the L-shaped welded part is not less than 400mm, and the L-shaped welded part has multiple bolt holes with a diameter of not less than 34mm.

[0014] Further, step S5 includes the following: S501: Transport the bottom plate unit, web plate I-beam and partition plate unit to the bridge site; S502: With the main pier as the center, symmetrical segments are installed on both sides, and each segment includes the bottom plate unit, web I-beam and partition plate unit.

[0015] Further, step S502 includes the following: S5021: Install segment #0 on the main pier; S5022: Simultaneously install the web plate I-beams on both sides of the main pier. The web plate butt joints of the web plate I-beams are welded to the previously completed segments. During welding, L-shaped load-bearing matching parts are used for positioning and connection. S5023: The bottom plate units on both sides of the main pier are symmetrically installed and welded to the web plate I-beams and the previously completed segment bottom plate. During welding, the bottom plate is positioned and connected by plate-type load-bearing matching parts. S5024: Symmetrically install and weld the partition units. When installing truss-type partition units, use the centering of the bottom plate transverse ribs as a reference to hoist and position the first angle steel member of the truss partition, and then assemble the remaining angle steel members in sequence. S5025: Assemble and connect segment by segment in a symmetrical manner towards both sides.

[0016] One or more technical solutions provided in the embodiments of this application have at least the following technical effects or advantages: 1. This application discloses a corrugated steel web I-shaped segment. This structure reduces the pouring process of the bottom plate concrete and replaces it with a bottom plate unit (steel bottom plate), which helps to reduce the self-weight of the bridge, enabling the bridge to break through the larger span, and improving the accuracy of beam erection and construction efficiency. At the same time, dividing the beam into the above-mentioned structure reduces the number of on-site erection components and modular construction, which helps to improve the accuracy of on-site erection and construction efficiency.

[0017] 2. The I-shaped segment of this application rationally divides the corrugated steel web and steel box girder, grouping together the components that control the dimensional accuracy of the main structure to form a web I-shaped component composed of the above-mentioned structure. This reduces the construction complexity of bridge site erection, ensures the overall accuracy of the girder segment is controllable during bridge site erection, and also takes into account the feasibility of highway transportation, including the stability of the structure itself and the transportation dimensions. Furthermore, most of the work of controlling the alignment accuracy is completed in the processing plant, which can ensure the overall accuracy controllability of the bridge.

[0018] 3. This application adopts a symmetrical arrangement of web plate I-beams, which is more conducive to controlling the bridge erection alignment and mutual correction. After the two web plate I-beams are erected, they have a better resistance to lateral wind loads through the lateral support at the front end and their own structural advantages. At the same time, the use of X-shaped support members not only reduces the self-weight of the structure, but also uses triangular stability support to control the stability of the beam structure at key positions. At that time, the support members were relatively scattered, and it was difficult to position and control the accuracy of each one on site. Therefore, by rotating and fixing the short members on both sides to the I-beams through the principle of pin hinges, they can be quickly rotated into place during erection, which improves both work efficiency and cross-sectional dimensional accuracy.

[0019] 4. This application discloses a method for manufacturing a steel box girder, which can improve the matching accuracy and construction efficiency during the erection of corrugated steel web I-beam structures and ensure the box opening dimensions. Attached Figure Description

[0020] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the structure of a corrugated steel web I-section segment according to a specific embodiment 1 of the present invention; Figure 2 for Figure 1 Structural schematic diagrams of diaphragm-type and rod-type web plate I-beams; Figure 3 for Figure 1 A schematic diagram of the exploded structure; Figure 4 This is a schematic flowchart illustrating a method for manufacturing a steel box girder according to a specific embodiment 2 of the present invention; Figure 5 for Figure 4 A schematic diagram of the installation of load-bearing matching components in the process; 1-Base plate unit; 2-Bar web I-beam; 3-Diaphragm web I-beam; 4-Solid web diaphragm unit; 5-Truss diaphragm unit; 6- 201-Bottom panel of member; 202-Corrugated web of member; 203-Angle steel member; 204-Upper flange of member; 205-Separator member; 301-Baffle-type bottom panel; 302-Baffle-type corrugated web; 303-Middle diaphragm; 304-Baffle-type upper flange. Detailed Implementation

[0022] The embodiments of the technical solution of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the technical solution of the present invention and are therefore intended to limit the scope of protection of the present invention. It should be noted that, unless otherwise stated, the technical or scientific terms used in this application should have the ordinary meaning as understood by those skilled in the art to which this invention pertains.

[0023] In the description of this application, it should be understood that the terms "upper", "lower", "top", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0024] To better understand the above technical solutions, the following will provide a detailed description of the technical solutions in conjunction with the accompanying drawings and specific embodiments.

[0025] Example 1: like Figure 1-3 As shown in the embodiment of this application, a corrugated steel web I-shaped segment is disclosed, which can be adapted to bridges with corrugated steel webs with a main span of more than 150m, and is also convenient for subsequent positioning and welding.

[0026] The specific structure of this application includes: The base plate unit 1, which consists of multiple units, includes components such as a base plate and T-ribs, and it is necessary to ensure that the base plate unit 1 has sufficient strength and stability. At least two rod-shaped web members 2 are installed on both sides of the base plate unit 1; At least two partition-type web plate I-beams 3 are installed on both sides of the bottom plate unit 1, and the partition-type web plate I-beams 3 are connected to the rod web plate I-beams 2. The partition-type web plate I-beams 3 and the rod web plate I-beams 2 located on the same side of the bottom plate unit 1 are staggered. A solid-web partition unit 4 is installed on the base plate unit 1, and the solid-web partition unit 4 is disposed between the partition-type web plate I-beams 3. A truss-type partition unit 5 is installed on the base plate unit 1, and the truss-type partition unit 5 is disposed between the bar web I-shaped members 2.

[0027] The segment of this application includes a base plate unit 1, four web plate I-beams (two rod-type web plate I-beams 2 and two diaphragm-type web plate I-beams 3) and two diaphragm units (one solid-web diaphragm unit 4 and one truss-type diaphragm unit 5); wherein the base plate unit 1 is divided into two parts, one part of which is connected to the two diaphragm-type web plate I-beams 3, and the remaining part is connected to the two rod-type web plate I-beams 2, and then the diaphragm units are installed.

[0028] Among them, the structure of the rod-type web plate I-beam 2 and the partition-type web plate I-beam 3 is similar, both including components such as a bottom panel, a corrugated web plate and an upper flange plate. Specifically, the connection structure at the corrugated web plate is different. The rod-type web plate I-beam 2 includes a rod-type corrugated web plate 202, on which a rotatable angle steel rod 203 is installed. The partition-type web plate I-beam 3 includes a partition-type corrugated web plate 302, on which a vertical middle partition plate is installed.

[0029] The web plate I-beam 2 of the rod includes: Rod bottom panel 201; The corrugated web 202 of the rod is vertically installed on the bottom panel 201 of the rod; Angle steel member 203 is installed on the inner side of the corrugated web 202 of the member; The upper flange plate 204 of the rod is installed on the top of the corrugated web plate 202 of the rod; The partition-type web plate formwork 3 includes: Partition-type bottom panel 301; A diaphragm-type corrugated web 302 is vertically mounted on the diaphragm-type bottom panel 301 shown. The middle partition 303 is installed on the inner wall of the partition-type corrugated web 302; A diaphragm-type upper flange 304 is installed on top of the diaphragm-type corrugated web 302.

[0030] There are two rod web I-beams 2, and the rod web I-beams 2 are installed in parallel on both sides of the bottom plate unit 1; the angle steel rods of the two rod web I-beams 2 are combined to form an X-shaped support, and multiple spacer rods are installed between the two rod web I-beams 2. There are two partition-type web plate I-beams 3, and the partition-type web plate I-beams 3 are arranged in parallel on both sides of the bottom plate unit 1.

[0031] Example 2: like Figure 4 , 5 As shown, this application also discloses a method for manufacturing a steel box girder, which includes the corrugated steel web I-shaped segment as described in Example 1, and specifically includes the following steps: S1: Fabricate the base plate unit; the specific details of this step are as follows: S101: To manufacture T-ribs, the material is first cut using a CNC plasma cutting machine to create the T-rib flanges and webs. The T-rib webs are cut in pairs with breaks in between, and the planar deformation caused by the cutting is corrected by cold straightening. Then, the T-ribs are assembled and welded in an I-shape to offset the deformation caused by welding. Finally, the T-ribs are flame-cut and trimmed using a semi-automatic carriage along the cutting line of the T-rib webs to cut the T-ribs and trim any deformed areas. S102: Fabrication of the base plate unit. First, cut the material using a gantry cutter or CNC precision cutter for the plate ribs, transverse ribs, web plates, and flange plates. For base plates with double-length blanks, cutting is not required. Mechanical or flame straightening is used to correct flame cutting deformation. Second, assemble the plate by marking the longitudinal and transverse baselines and the assembly position lines for the longitudinal ribs. Assemble the longitudinal ribs according to the lines, and assemble the transverse rib units by centering them with the width of the transverse rib flange plates, focusing on controlling the verticality. Finally, weld and straighten the plate unit by placing it on the ship's jig and using a gantry multi-electrode welding machine to weld the weld between the plate ribs and the panel. This helps control the verticality of the plate ribs and the symmetrical distribution of welding stress, and corrects welding deformation.

[0032] Assemble the transverse rib units, focusing on controlling the angle between the transverse ribs and the base plate to obtain the base plate unit; S2: The web plate I-beam is manufactured using a continuous matching process. The web plate I-beam is divided into rod-type web plate I-beams and diaphragm-type web plate I-beams. The specific details of this step are as follows: S201: A jig platform is selected. This jig platform is a longitudinal and transverse beam system. The flatness of the top surface of the jig platform is ≤2.0mm. This can control the deformation during the manufacturing process. Moreover, the jig platform is arranged according to the outline of the I-shaped structure. S202: The first qualified web plate part is used as the reference part for positioning on the jig platform; S203: Starting with the reference I-beam, perform continuous matching assembly; the continuous matching assembly is performed in two I-beams as one assembly round, and the I-beams are welded sequentially in the same span, the same section, and the same side, while controlling the ring size and the misalignment of the plate edge at the interface during the welding process; the specific content of this step is as follows: ① First, draw the web outline on the unribbed side of the upper flange plate unit with the plate width allowance evenly. Then, draw the web position line on the bottom plate unit with the baseline as the reference. At the same time, draw the diaphragm or transverse rib position lines on the web. ② Place the corrugated steel web flat on the assembly jig, align the longitudinal baseline of the web with the longitudinal baseline of the jig, and assemble the upper flange plate unit in sections along the length of the web outline. Assemble the top plate unit with joints with the joint center aligned with the diaphragm position line as the reference. ③ Do not create a gap between the corrugated webs. Lay the second corrugated web flat according to the theoretical spacing. The relative relationship between the longitudinal baseline of the corrugated web and the longitudinal baseline of the jig should be strictly controlled according to the drawing requirements. At the same time, the misalignment in the thickness direction between the webs must be strictly controlled to be less than or equal to 0.5mm. ④ Assemble the partition units sequentially according to the lines, and assemble the bottom plate unit and bottom plate transverse ribs with the baseline as the reference. During assembly, the twisting of the corrugated steel web, the alignment accuracy, and the perpendicularity of the top and bottom partitions to the web should be strictly controlled. After meeting the requirements, position welding should be performed. ⑤ Weld the inner weld of the corrugated steel web I-shaped structural box. After welding, repair the welding deformation, focusing on repairing the flatness of the corrugated steel web, the verticality and flatness of the upper flange plate, bottom plate, and partition unit, and the misalignment of adjacent ring openings, and correct the longitudinal baseline and vertical baseline. ⑥ Install the matching parts for the upper flange, bottom plate, and web plate; ⑦ Complete the welding of the inner seams of the box, and turn the box over to complete the welding of the outer seams; S203: After completing an assembly round, the second web plate I-beam of that round is retained as the reference I-beam for the next assembly round, and S202 is repeated until all web plate I-beams are assembled and manufactured. S3: A load-bearing matching component is configured on the web plate I-beam; S4: Fabricate partition units, which are divided into solid-web partition units and truss partition units; S5: Transport the base plate unit, web plate I-beam and partition plate unit to the site for erection, splicing and welding to complete the manufacturing.

[0033] In step S2, if the height of the corrugated web in the web formwork is less than 4 meters, it is made by continuous molding; if the height is not less than 4 meters, it is made by single-wave segmentation and single-wave molding. After processing, it is welded and spliced ​​to form the corrugated web.

[0034] The specific content of step S3 is as follows: Step S301: Two sets of plate-type load-bearing matching parts are arranged at the annular positions of the upper flange plate and the bottom plate of the web plate I-shaped part, respectively. Each set of matching parts achieves the positioning and connection of the annular seam through a fixed core plate and a connecting plate. Step S302: Five sets of L-shaped load-bearing matching parts are arranged on each vertical joint of the corrugated steel web of the web I-beam. Each set of matching parts is positioned and connected to the vertical joint through L-shaped welding parts.

[0035] In step S301, the fixed core plate is symmetrically arranged with two bolt holes with a diameter of not less than 34 mm and two punch holes with a diameter of not less than 26 mm, through which M24 high-strength bolts and φ26 mm punches are respectively inserted. In step S302, the length of the L-shaped welded part is not less than 400mm, and the L-shaped welded part has multiple bolt holes with a diameter of not less than 34mm.

[0036] Step S5 includes the following: S501: Transport the bottom plate unit, web plate I-beam and partition plate unit to the bridge site; S502: With the main pier as the center, symmetrical segments are installed on both sides, and each segment includes the bottom plate unit, web I-beam and partition plate unit.

[0037] Step S502 includes the following: S5021: Install segment #0 on the main pier; S5022: Simultaneously install the web plate I-beams on both sides of the main pier. The web plate butt joints of the web plate I-beams are welded to the previously completed segments. During welding, L-shaped load-bearing matching parts are used for positioning and connection. S5023: The bottom plate units on both sides of the main pier are symmetrically installed and welded to the web plate I-beams and the previously completed segment bottom plate. During welding, the bottom plate is positioned and connected by plate-type load-bearing matching parts. S5024: Symmetrically install and weld the partition units. When installing truss-type partition units, use the centering of the bottom plate transverse ribs as a reference to hoist and position the first partition member of the truss partition, and then assemble the remaining partition members in sequence. S5025: Assemble and connect segment by segment in a symmetrical manner towards both sides.

[0038] The following is a further explanation of the preparation method of this application: The truss-type partition unit in this application is mainly composed of angle steel members forming an X-shaped or V-shaped frame structure.

[0039] Two shorter diagonal members are rotatably installed on the inner wall of the corrugated web of the member. Before erection, the diagonal members are rotated and attached to the inner wall of the corrugated web of the member. A special angle steel fixing device is designed to hold the angle steel flange, and then wedges are used to squeeze it tightly to prevent shaking during transportation and avoid damage to the paint. At the same time, the rotation radius of the diagonal members should not interfere with the members of the truss-type partition unit.

[0040] During erection, the temporary fixing devices of the diagonal members are removed, and the members are quickly rotated to the connecting plates of the truss-type partition unit with the assistance of lifting equipment and then welded and fixed.

[0041] Numerous specific details are set forth in this specification. However, it will be understood that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures, and techniques have not been shown in detail so as not to obscure the understanding of this specification. In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be covered within the scope of the claims and specification of the present invention.

Claims

1. A corrugated steel web I-shaped segment, characterized in that, include: Base plate unit; A rod web I-shaped component is installed on the side of the base plate unit; A partition-type web plate formwork is installed on the side of the bottom plate unit, and the partition-type web plate formwork is connected to the rod web plate formwork. A solid-web partition unit is installed on the base plate unit, and the solid-web partition unit is disposed between the partition-type web plate I-beams; A truss-type partition unit is installed on the base plate unit, and the truss-type partition unit is arranged between the I-beams of the bar web.

2. The I-shaped steel web segment according to claim 1, characterized in that, The web plate of the rod includes: Bottom panel of the rod; The corrugated web of the rod is vertically installed on the bottom panel of the rod; Two angle steel members are rotatably and parallelly installed on the inner side of the corrugated web of the member; The upper flange plate of the rod is installed on the top of the corrugated web of the rod; The partition-type web plate formwork includes: Partition-type bottom panel; A diaphragm-type corrugated web is vertically installed on the diaphragm-type bottom panel shown. A diaphragm is installed on the inner wall of the diaphragm-type corrugated web. A diaphragm-type upper flange is installed on top of the diaphragm-type corrugated web.

3. The I-shaped steel web segment according to claim 2, characterized in that, There are two rod web I-beams, and the rod web I-beams are installed in parallel on both sides of the bottom plate unit; the angle steel members of the two rod web I-beams are combined to form an X-shaped support, and multiple spacer members are installed between the two rod web I-beams; There are two partition-type web plate I-beams, and the partition-type web plate I-beams are arranged in parallel on both sides of the bottom plate unit.

4. A method for manufacturing a steel box girder, characterized in that, The corrugated web steel box girder comprises multiple corrugated web I-shaped segments as described in any one of claims 1-3, and includes the following steps: S1: Fabricate the base plate unit; S2: The web plate I-beam is manufactured using a continuous matching manufacturing method. The web plate I-beam is divided into rod-type web plate I-beam and partition-type web plate I-beam. S3: A load-bearing matching component is configured on the web plate I-beam; S4: Fabricate partition units, which are divided into solid-web partition units and truss partition units; S5: Transport the base plate unit, web plate I-beam and partition plate unit to the site for erection, splicing and welding to complete the fabrication of the steel box girder.

5. The manufacturing method according to claim 4, characterized in that, The specific content of step S2 is as follows: S201: Select a tire rack platform; S202: The first qualified web plate part is used as the reference part for positioning on the jig platform; S203: Starting from the reference I-beam, perform continuous matching assembly; the continuous matching assembly is performed with two web I-beams as one assembly round, and the I-beams are welded sequentially in the same span, the same section, and the same side, while controlling the ring size and the misalignment of the plate edge at the interface during the welding process. S203: After completing an assembly round, retain the second web plate I-beam of that round as the reference I-beam for the next assembly round, and repeat S202 until all web plate I-beams are assembled and manufactured.

6. The manufacturing method according to claim 5, characterized in that, If the height of the corrugated web in the web formwork in step S2 is less than 4 meters, it is made by continuous molding. If the height is not less than 4 meters, it is made by single-wave segmentation and single-wave molding. After processing, it is welded and spliced ​​to form the corrugated web.

7. The manufacturing method according to claim 5, characterized in that, The specific content of step S3 is as follows: Step S301: Two sets of plate-type load-bearing matching parts are arranged at the annular positions of the upper flange plate and the bottom plate of the web plate I-shaped part, respectively. Each set of matching parts achieves the positioning and connection of the annular seam through a fixed core plate and a connecting plate. Step S302: Five sets of L-shaped load-bearing matching parts are arranged on each vertical joint of the corrugated steel web of the web I-beam. Each set of matching parts is positioned and connected to the vertical joint through L-shaped welding parts.

8. The manufacturing method according to claim 7, characterized in that, In step S301, the fixed core plate is symmetrically arranged with two bolt holes with a diameter of not less than 34mm and two punch holes with a diameter of not less than 26mm, through which M24 high-strength bolts and φ26mm punches are respectively inserted. In step S302, the length of the L-shaped welded part is not less than 400mm, and the L-shaped welded part has multiple bolt holes with a diameter of not less than 34mm.

9. The manufacturing method according to claim 8, characterized in that, Step S5 includes the following: S501: Transport the bottom plate unit, web plate I-beam and partition plate unit to the bridge site; S502: With the main pier as the center, symmetrical segments are installed on both sides, and each segment includes the bottom plate unit, web I-beam and partition plate unit.

10. The manufacturing method according to claim 9, characterized in that, Step S502 includes the following: S5021: Install segment #0 on the main pier; S5022: Simultaneously install the web plate I-beams on both sides of the main pier. The web plate butt joints of the web plate I-beams are welded to the previously completed segments. During welding, L-shaped load-bearing matching parts are used for positioning and connection. S5023: The bottom plate units on both sides of the main pier are symmetrically installed and welded to the web plate I-beams and the previously completed segment bottom plate. During welding, the bottom plate is positioned and connected by plate-type load-bearing matching parts. S5024: Symmetrically install and weld the partition units. When installing truss-type partition units, use the centering of the bottom plate transverse ribs as a reference to hoist and position the first partition member of the truss partition, and then assemble the remaining partition members in sequence. S5025: Assemble and connect segment by segment in a symmetrical manner towards both sides.

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