A Y-shaped tree-like special-shaped thick plate steel column

Abstract

The invention discloses a working method for a Y-shaped tree-like special-shaped thick plate steel column, which comprises the following steps: assembling a lower box body; hoisting a web plate of the lower box body for positioning; before installing a vertical inner partition plate inside the box body, segmenting the notch position of a slotted cover plate by 150 mm to produce a patching section, and then assembling and docking the notches after internal welding; installing and welding the slotted cover plate; positioning each plate in a Y-shaped forked box assembly; after each plate is installed and positioned as qualified in the previous step, the interlayer temperature is controlled between 200° C. and 250° C. during welding between components; and integrity acceptance. The working method for a Y-shaped tree-like special-shaped thick plate steel column described in the invention adopts a scientific construction process and construction steps to manufacture the same, which can effectively prevent the Y-shaped tree-like special-shaped thick plate steel column from having layered tearing, ensure the quality of the joint and the ductility and toughness of the joint, reduce and eliminate welding deformation and residual stress, and effectively improve the welding quality of the Y-shaped tree-like special-shaped thick plate steel column.

Description

Technical Field

[0001] The invention belongs to the technical field of steel structure buildings, and particularly relates to a Y-shaped tree-like special-shaped thick plate steel column. Background Art

[0002] The roof steel structure adopts an oblique cross grid truss structure system. The roof plane projection is 105x88m. The trusses are cross-distributed in a diamond shape, and the rods are welded. The roof truss extends downward in an arc to the west and intersects with the box-shaped steel columns on the west side at one point. The intersection is an arc-shaped triangular area, and it is a variable-section welded box. The east side of the roof is connected to a three-dimensional arch truss. The lower part of the arch truss is supported by a lattice support system composed of lower steel columns and column braces. The entire arch truss is shaped like a door curtain.

[0003] The support column is an important supporting component in the support system. Many existing support columns are cylindrical. Both their appearance and the supporting performance of the column body can hardly meet the needs of current buildings for special structural supports. During construction, many adapter columns need to be set on them to achieve this. This not only increases the difficulty of construction, but also increases the cost of construction and prolongs the construction period. The Y-shaped tree-like special-shaped thick plate steel structure column in the present invention has a relatively complex structure. Due to the thick steel material, there are unfavorable factors such as poor weldability, serious layered tearing tendency, large welding residual stress, and influence of welding deformation on accuracy, which seriously affect the welding quality. The welding quality of the thick plate has a direct impact on this project. The structure is prone to serious angular deformation, twisting deformation, local or overall deformation during the welding process, so its construction process needs to be improved. Summary of the invention

[0004] Purpose of the invention: In order to overcome the above shortcomings, the purpose of the present invention is to provide a Y-shaped tree-like special-shaped thick plate steel column, which is manufactured using scientific construction technology and construction steps, and can effectively prevent the Y-shaped tree-like special-shaped thick plate steel column from layered tearing, ensure the quality of the joint and the ductility and toughness of the joint, reduce and eliminate welding deformation and residual stress, and effectively improve the welding quality of the Y-shaped tree-like special-shaped thick plate steel column.

[0005] Technical solution: In order to achieve the above purpose, the present invention provides a working method of a Y-shaped tree-shaped special-shaped thick plate steel column. The specific working method is as follows:

[0006] 1): Assemble the lower box body, assemble and weld the vertical inner partition, top sealing plate and corresponding horizontal stiffener in advance;

[0007] 2): After the welding flaw detection of the horizontal stiffener, top sealing plate and vertical inner partition is qualified, the lower box belly plate is hoisted for positioning;

[0008] 3): In order to ensure the welding of the lower box body web and the internal stiffening plate, the vertical inner partition inside the box body is divided into 150mm sections at the slot position of the slotted cover plate before installation, and the embedded sections are made, and then assembled and docked after the internal welding;

[0009] 4): Install and weld the slotted cover plate. After all the baffles and stiffeners inside the lower box have passed the flaw detection, hoist the slotted cover plate for positioning. The slotted cover plate and the vertical inner baffle are welded and fixed with full penetration welds and backing plate welding grooves;

[0010] 5): Position each plate in the Y-shaped fork box assembly, and use three-dimensional spatial coordinates to accurately position the tie plate, Y-shaped fork angle plate, Y-shaped fork box partition, Y-shaped fork inclined plate, and a group of Y-shaped fork inner angle plates in turn to ensure the spatial dimensions of each contact point and contact surface;

[0011] 6): After the installation and positioning of each plate is qualified in the previous step, self-inspection and mutual inspection are carried out. After confirmation, submit it to the full-time inspector and report it to the on-site supervisor for acceptance. After passing the inspection, welding can be carried out. The Y-shaped fork box partition, the Y-shaped fork inclined plate and the box wall plate are symmetrically welded by an even number of welders. In order to effectively reduce the overall welding deformation, CO2 gas shielded welding with a small line energy is used for welding. The main welds at the four corners of the main body are welded by submerged arc automatic welding to ensure the welding quality. The welds are cleaned and inspected after welding;

[0012] 7): When welding between components, the interlayer temperature is controlled between 200℃ and 250℃. In order to maintain this temperature, when welding thick plates, it is required to complete the welding operation continuously at one time. When the component is long, the thick plate cools down faster during the welding process. Therefore, the preheating temperature is always maintained during the welding process to prevent the interlayer temperature from dropping due to rapid cooling after welding. When welding, the insulation board can also be covered immediately after welding to prevent the temperature of the welding area from cooling down too quickly.

[0013] 8): When installing the above components, the center line and outer edge of the box are aligned with the ground position line when positioning the box web bending and torsion plate, and the fit between its end and the ground position is controlled at the same time. After correct positioning, it is firmly spot welded with the angle plates on both sides; when positioning the components, assemble and position them with one end of the top sealing plate as the positive end, and the margin is placed on the side of the docking port. The local flatness of the component does not exceed 2mm, the overall dimension is ±1mm, and the assembly reference line is ±0.5mm;

[0014] 9): Integrity acceptance. After the flaw detection is qualified, the node will be hoisted onto the tire frame again for positioning. As before, the horizontality of the tire frame must be re-checked again. The positioning is still based on the center line of the box body, and the method is the same as before;

[0015] 10): After the component is positioned, the production staff will conduct a comprehensive and detailed measurement of the main control dimensions such as the box web body, node brackets, port dimensions, etc. The excess should be trimmed, and after passing the inspection, the entire component will be inspected and accepted by combining the ground sample method and the total station. The working method of the Y-shaped tree-shaped special-shaped thick plate steel column described in the present invention adopts scientific construction technology and construction steps to manufacture it, which can effectively prevent the Y-shaped tree-shaped special-shaped thick plate steel column from layered tearing, ensure the quality of the joint and the ductility and toughness of the joint, reduce and eliminate welding deformation and residual stress, and can effectively improve the welding quality of the Y-shaped tree-shaped special-shaped thick plate steel column.

[0016] Among them, in the working method of the Y-shaped tree-shaped special-shaped thick plate steel column, the tolerance requirement for the marking of the tie plate in step 5) is:

[0017] Parallelism of both sides of the tie plate: ≯1mm;

[0018] Length and width error: ≯1mm;

[0019] Long side straightness: ≯1.5mm;

[0020] End face non-perpendicularity: ≤1mm.

[0021] Furthermore, in the working method of the Y-shaped tree-shaped special-shaped thick plate steel column, the box body web in step 7) is inspected by a sampling box detection method after being manufactured to ensure the forming quality of the bending and twisting web, and the finely processed and pressed part plate is hoisted onto the sample box again to detect the secondary processing torsion of the bending and twisting plate, and a marker is used to mark the corresponding position;

[0022] Steels that fail the inspection shall be corrected by cold working. After correction, there shall be no obvious concave surface or damage on the surface of the steel. The depth of scratches shall not exceed 0.5mm and shall not be greater than 1 / 2 of the negative allowable deviation of the thickness of the steel.

[0023] The present invention discloses a Y-shaped tree-like special-shaped thick plate steel column, a lower box, a column top sealing plate and a Y-shaped forked box assembly, wherein the column top sealing plate is arranged above the lower box, and the Y-shaped forked box assembly is arranged above the column top sealing plate.

[0024] Furthermore, the lower box body includes a group of top sealing plates, a group of box body belly plates, vertical inner partition plates and slotted cover plates, the top sealing plates and slotted cover plates are relatively arranged on the short sides of the column top sealing plates, the box body belly plates are relatively arranged on the long sides of the column top sealing plates, and the vertical inner partition plates are arranged on the column top sealing plates and parallel to the box body belly plates.

[0025] Furthermore, the vertical inner partition includes a first inner partition and a second inner partition, and the first inner partition and the second inner partition are cross-arranged; a group of horizontal stiffening plates are provided on both sides of the first inner partition, and one end of the horizontal stiffening plate is connected to the second inner partition, and the outer side of the horizontal stiffening plate is connected to the belly plate of the box body.

[0026] Furthermore, a third vertical partition is provided on the upper portion of the vertical inner partition, and a group of partition stiffening plates are provided on both sides of the third vertical partition.

[0027] Furthermore, the Y-shaped fork box assembly includes a tie plate, a Y-shaped fork angle plate, a Y-shaped fork box partition, a Y-shaped fork inclined plate, a group of Y-shaped fork inner angle plates, a Y-shaped fork top plate sealing plate and a box body web plate, the tie plate is arranged on the column top sealing plate, the Y-shaped fork angle plate is arranged on the column top sealing plate and on one side of the tie plate, the Y-shaped fork box partition is arranged between the tie plate and the Y-shaped fork angle plate, the Y-shaped fork inclined plate The plate is arranged on the outside of the Y-shaped fork box partition, and the two ends of the Y-shaped fork inclined plate are respectively connected to the column top sealing plate and the Y-shaped fork angle plate, the Y-shaped fork inner angle plate is arranged on both sides of the tie plate and connected to the Y-shaped fork inclined plate, the Y-shaped fork top plate sealing plate is arranged above the Y-shaped fork angle plate, the Y-shaped fork inclined plate and the Y-shaped fork inner angle plate, and the box belly plate is arranged on the outside of the Y-shaped fork angle plate and the Y-shaped fork inner angle plate.

[0028] Furthermore, a vertical partition is also provided in the Y-shaped fork box assembly, and the vertical partition is arranged perpendicular to the Y-shaped fork box partition.

[0029] Furthermore, the tie plate is L-shaped, and connecting ear plates are provided on both sides thereof;

[0030] The box body web is a bending and twisting web.

[0031] It can be seen from the above technical solution that the present invention has the following beneficial effects:

[0032] 1. The working method of the Y-shaped tree-like special-shaped thick plate steel column described in the present invention adopts scientific construction technology and construction steps to manufacture it, which can effectively prevent the Y-shaped tree-like special-shaped thick plate steel column from layered tearing, ensure the joint quality and the ductility and toughness of the joint, reduce and eliminate welding deformation and residual stress, and effectively improve the welding quality of the Y-shaped tree-like special-shaped thick plate steel column.

[0033] 2. In the process of construction, the present invention adopts heating preheating and welding to prevent cracks, and the interlayer temperature is controlled between 200℃ and 250℃. In order to maintain this temperature, when welding thick plates, continuous welding is required to be completed once, which can effectively prevent multiple thermal strains from occurring in the weld area, solve the residual stress well, and improve the welding quality of the welds between components.

[0034] 3. The Y-shaped thick plate steel column described in the present invention has a simple structure, reasonable design, and is easy to construct. The lower box body and the Y-shaped forked box body assembly are connected by a column top sealing plate to form a Y-shaped thick plate steel column, which can not only meet the support needs, but also meet the needs of special-shaped installation, effectively reduce the difficulty of construction, reduce the use of adapters, save construction costs, and effectively shorten the construction period, so that it can better meet the needs of construction.

[0035] 4. The lower box body of the present invention includes a box body bottom plate, a group of top sealing plates, a group of box body belly plates and vertical inner partitions. The arrangement of the vertical inner partitions can effectively improve the overall stability and support of the lower box body structure.

[0036] 5. In the present invention, the first inner partition and the second inner partition are arranged crosswise, which can further improve the stability of the structure and the support of the structure of the entire lower box.

[0037] 6. The Y-shaped bifurcated box assembly of the present invention adopts a unique structural design, which not only meets the need for support, but also enables switching, so that it can better meet the needs of construction.

[0038] 7. The Y-shaped bifurcated box partition of the present invention comprises a box partition body, the inner side of which is provided with a first bevel, and the side close to the Y-shaped bifurcated bevel is provided with a second bevel. The box partition body adopts a unique structural design, which can effectively improve the stability of the connection of the Y-shaped bifurcated box assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 It is a structural schematic diagram of a Y-shaped tree-like special-shaped thick plate steel column of the present invention;

[0040] Figure 2 It is a schematic diagram of the internal structure of the Y-shaped bifurcated box assembly in the present invention;

[0041] Figure 3 It is a schematic diagram of the installation of the inner corner plate of the Y-shaped fork in the present invention;

[0042] Figure 4 It is a structural schematic diagram of the lower box body in the present invention;

[0043] Figure 5 It is a schematic diagram of the internal structure of the lower box body in the present invention. DETAILED DESCRIPTION

[0044] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0045] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0046] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "plurality" means two or more, unless otherwise clearly specified.

[0047] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0048] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0049] Example 1

[0050] The working method of a Y-shaped tree-like special-shaped thick plate steel column described in this embodiment is as follows:

[0051] 1): Assemble the lower box body 1, assemble and weld the vertical inner partition 13, the top sealing plate 11 and the corresponding horizontal stiffening plate 133 in advance;

[0052] 2): After the welding of the horizontal stiffener 133, the top sealing plate 11 and the vertical inner partition 13 is qualified, the lower box body web 12 is hoisted for positioning;

[0053] 3): In order to ensure the welding of the lower box body web 12 and the internal stiffening plate, the vertical inner partition 13 inside the box body is divided into 150mm sections at the notch position of the slotted cover plate 14 before installation, and the embedded sections are made, and then assembled and docked after the internal welding;

[0054] 4: Install and weld the slotted cover plate 14. After all the baffles and stiffeners inside the lower box body 1 are welded and inspected to be qualified, the slotted cover plate 14 is hoisted and positioned. The notch of the slotted cover plate 14 and the vertical inner baffle 13 are welded and fixed with full penetration welds in the form of backing plate welding grooves;

[0055] 5): Position each plate in the Y-shaped fork box assembly 3, and use three-dimensional spatial coordinates to accurately position the tie plate 31, the Y-shaped fork angle plate 32, the Y-shaped fork box partition 33, the Y-shaped fork inclined plate 34, and a group of Y-shaped fork inner angle plates 35 in turn to ensure the spatial dimensions of each contact point and contact surface;

[0056] 6): After the installation and positioning of each plate is qualified in the previous step, self-inspection and mutual inspection are carried out. After confirmation, submit it to the full-time inspector and report it to the on-site supervisor for acceptance. After passing the inspection, welding can be carried out. The Y-shaped fork box partition 33, the Y-shaped fork inclined plate 34 and the box wall plate are symmetrically welded by an even number of welders. In order to effectively reduce the overall welding deformation, CO2 gas shielded welding with a small line energy is used for welding. The main welds at the four corners of the main body are welded by submerged arc automatic welding to ensure the welding quality. After welding, the welds are cleaned and inspected;

[0057] 7): When welding between components, the interlayer temperature is controlled between 200℃ and 250℃. In order to maintain this temperature, when welding thick plates, continuous welding is required to be completed in one operation. When the component is longer than L>10 meters, the thick plate cools faster during the welding process. Therefore, the preheating temperature is always maintained during the welding process to prevent the interlayer temperature from dropping due to rapid cooling after welding. When welding, the insulation board can be covered immediately after welding to prevent the temperature of the welding area from cooling too quickly.

[0058] 8): When installing the above components, the box body centerline and outer edge line are aligned with the ground position line when the box body web 37 bending and torsion plate is positioned, and the fit between its end and the ground position is controlled at the same time. After the positioning is correct, it is spot welded firmly with the angle plates on both sides; when positioning the component, the top sealing plate 11 is used as the positive end for assembly positioning, and the margin is placed on the side of the docking port. The local flatness of the component does not exceed 2mm, the overall dimension is ±1mm, and the assembly reference line is ±0.5mm;

[0059] 9): Integrity acceptance. After the flaw detection is qualified, the node will be hoisted onto the tire frame again for positioning. As before, the horizontality of the tire frame must be re-checked again. The positioning is still based on the center line of the box body, and the method is the same as before;

[0060] 10): After the components are positioned, the production staff will conduct a comprehensive and detailed measurement of the main control dimensions of the box web 37 body, node bracket, port size, etc. The excess should be trimmed. After passing the inspection, the entire component will be inspected and accepted by combining the ground sample method and the total station.

[0061] The tolerance requirement for cutting and marking the tie plate 31 in step 5 of this embodiment is:

[0062] Parallelism of both sides of the tie plate 31: ≯1mm;

[0063] Length and width error: ≯1mm;

[0064] Long side straightness: ≯1.5mm;

[0065] End face non-perpendicularity: ≤1mm.

[0066] In the present embodiment, the box body web 37 in step 7 is inspected by a sampling box detection method after being manufactured to ensure the forming quality of the bending and twisting web. The finely processed and pressed part plate is again hoisted on the sample box to detect the bending and twisting plate for secondary processing and twisting potential, and a marker is used to mark the corresponding position;

[0067] Steels that fail the inspection shall be corrected by cold working. After correction, there shall be no obvious concave surface or damage on the surface of the steel. The depth of scratches shall not exceed 0.5mm and shall not be greater than 1 / 2 of the negative allowable deviation of the thickness of the steel.

[0068] Example 2

[0069] A Y-shaped tree-like special-shaped thick plate steel column manufactured by the working method of a Y-shaped tree-like special-shaped thick plate steel column described in Example 1 comprises: a lower box body 1, a column top sealing plate 2 and a Y-shaped forked box body assembly 3, wherein the column top sealing plate 2 is arranged above the lower box body 1, and the Y-shaped forked box body assembly 3 is arranged above the column top sealing plate 2.

[0070] In this embodiment, the lower box body 1 includes a group of top sealing plates 11, a group of box body belly plates 12, vertical inner partition plates 13 and slotted cover plates 14. The top sealing plates 11 and the slotted cover plates 14 are relatively arranged on the short sides of the column top sealing plates 2, the box body belly plates 12 are relatively arranged on the long sides of the column top sealing plates 2, and the vertical inner partition plates 13 are arranged on the column top sealing plates 2 and are arranged parallel to the box body belly plates 12.

[0071] The vertical inner partition 13 in this embodiment includes a first inner partition 131 and a second inner partition 132, and the first inner partition 131 and the second inner partition 132 are cross-arranged; a group of horizontal stiffening plates 133 are provided on both sides of the first inner partition 131, and one end of the horizontal stiffening plate 133 is connected to the second inner partition 132, and the outer side of the horizontal stiffening plate 133 is connected to the belly plate 12 of the box body.

[0072] In this embodiment, a third vertical partition 134 is further provided on the upper portion of the vertical inner partition 13 , and a group of partition stiffening plates 135 are provided on both sides of the third vertical partition 134 .

[0073] The Y-shaped fork box assembly 3 in this embodiment includes a tie plate 31, a Y-shaped fork angle plate 32, a Y-shaped fork box partition 33, a Y-shaped fork inclined plate 34, a group of Y-shaped fork inner angle plates 35, a Y-shaped fork top plate sealing plate 36 and a box body web 37, wherein the tie plate 31 is arranged on the column top sealing plate 2, the Y-shaped fork angle plate 32 is arranged on the column top sealing plate 2 and arranged on one side of the tie plate 31, the Y-shaped fork box partition 33 is arranged between the tie plate 31 and the Y-shaped fork angle plate 32, the Y-shaped fork inclined plate 34 is arranged between the tie plate 31 and the Y-shaped fork angle plate 32, and the Y-shaped fork inner angle plate 35 is arranged on the column top sealing plate 2 and arranged on one side of the tie plate 31. Plate 34 is arranged on the outside of the Y-shaped fork box partition 33, and the two ends of the Y-shaped fork inclined plate 34 are respectively connected to the column top sealing plate 2 and the Y-shaped fork angle plate 32, the Y-shaped fork inner angle plate 35 is arranged on both sides of the tie plate 31 and is connected to the Y-shaped fork inclined plate 34, the Y-shaped fork top plate sealing plate 36 is arranged above the Y-shaped fork angle plate 32, the Y-shaped fork inclined plate 34 and the Y-shaped fork inner angle plate 35, and the box belly plate 37 is arranged on the outside of the Y-shaped fork angle plate 32 and the Y-shaped fork inner angle plate 35.

[0074] In this embodiment, a vertical partition 38 is further provided in the Y-shaped fork box assembly 3 , and the vertical partition 38 is vertically arranged with the Y-shaped fork box partition 33 .

[0075] In this embodiment, the tie plate 31 is L-shaped, and connecting ear plates 311 are provided on both sides thereof;

[0076] The box body web 37 is a bending and twisting web.

[0077] In this embodiment, the Y-shaped bifurcated box partition 33 comprises a box partition body, a first bevel 331 is provided on the inner side of the box partition body, and a second bevel 332 is provided on the side close to the Y-shaped bifurcated inclined plate 34 .

[0078] The overall dimensions of the Y-shaped tree-like special-shaped thick plate steel column described in this embodiment are: length 8056, width 2590, height 3280, and weight 31 tons. The lower box body opening of the lower box body 1 is 1800*600*60*60, the first inner partition 131, the second inner partition 132, the third vertical partition 134 and the column top cover plate are 80mm thick, the box body web 37 is 40mm thick, the Y-shaped bifurcated angle plate 32 and the Y-shaped bifurcated inner side angle plate 35 are 40mm thick, and the tie plate 31 is 80mm thick.

[0079] The above description is only a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several improvements without departing from the principle of the present invention, and these improvements should also be regarded as within the protection scope of the present invention.

Claims

1. A Y-shaped tree-like special-shaped thick plate steel column, characterized in that: include: A lower box body (1), a column top sealing plate (2) and a Y-shaped bifurcated box body assembly (3), wherein the column top sealing plate (2) is arranged above the lower box body (1), and the Y-shaped bifurcated box body assembly (3) is arranged above the column top sealing plate (2); The lower box body (1) comprises a top sealing plate, a group of box body webs (12), a vertical inner partition plate (13) and a slotted cover plate (11), wherein the top sealing plate and the slotted cover plate (11) are arranged on the short sides of the column top sealing plate (2) relative to each other, the box body webs (12) are arranged on the long sides of the column top sealing plate (2) relative to each other, and the vertical inner partition plate (13) is arranged on the column top sealing plate (2) and is arranged parallel to the box body webs (12); The vertical inner baffle (13) comprises a first inner baffle (131) and a second inner baffle (132), wherein the first inner baffle (131) and the second inner baffle (132) are arranged crosswise; a group of horizontal stiffening plates (133) are arranged on both sides of the first inner baffle (131), and one end of the horizontal stiffening plate (133) is connected to the second inner baffle (132), and the outer side of the horizontal stiffening plate (133) is connected to the box body web (12); A third vertical partition (134) is also provided on the upper portion of the vertical inner partition (13), and a group of partition stiffening plates (135) are provided on both sides of the third vertical partition (134); The Y-shaped fork box assembly (3) comprises a tie plate (31), a Y-shaped fork angle plate (32), a Y-shaped fork box partition plate (33), a Y-shaped fork inclined plate (34), a group of Y-shaped fork inner angle plates (35), a Y-shaped fork top plate sealing plate (36) and a second box body web plate (37), wherein the tie plate (31) is arranged on the column top sealing plate (2), the Y-shaped fork angle plate (32) is arranged on the column top sealing plate (2) and arranged on one side of the tie plate (31), the Y-shaped fork box partition plate (33) is arranged between the tie plate (31) and the Y-shaped fork angle plate (32), and the Y-shaped fork inclined plate (34) is arranged on the column top sealing plate (2). The Y-shaped fork inclined plate (34) is arranged on the outside of the Y-shaped fork box body partition (33), and the two ends of the Y-shaped fork inclined plate (34) are respectively connected to the column top sealing plate (2) and the Y-shaped fork angle plate (32), the Y-shaped fork inner angle plate (35) is arranged on both sides of the tie plate (31) and is connected to the Y-shaped fork inclined plate (34), the Y-shaped fork top plate sealing plate (36) is arranged above the Y-shaped fork angle plate (32), the Y-shaped fork inclined plate (34) and the Y-shaped fork inner angle plate (35), and the second box body web (37) is arranged on the outside of the Y-shaped fork angle plate (32) and the Y-shaped fork inner angle plate (35).

2. The Y-shaped tree-like special-shaped thick plate steel column according to claim 1 is characterized in that: A vertical partition (38) is also provided in the Y-shaped bifurcated box assembly (3), and the vertical partition (38) is arranged perpendicular to the Y-shaped bifurcated box partition (33).

3. The Y-shaped tree-like special-shaped thick plate steel column according to claim 1 is characterized in that: The tie plate (31) is L-shaped, and connecting ear plates (311) are provided on both sides thereof; The second box body web (37) is a bending-torsion web.

4. A method for working the Y-shaped tree-like special-shaped thick plate steel column according to claim 3, characterized in that: The specific working method is as follows: 1): Assemble the lower box body (1), assemble and weld the vertical inner partition plate (13) with the top sealing plate and the corresponding horizontal stiffening plate (133) in advance; 2): After the welding of the horizontal stiffener (133) and the top sealing plate and the vertical inner partition (13) passes the flaw detection, the lower box body belly plate (12) is hoisted for positioning; 3): To ensure the welding of the lower box body belly plate (12) and the internal stiffening plate, the vertical inner partition plate (13) inside the box body is divided into 150mm sections at the slot position of the slotted cover plate (11) before installation, and the embedded sections are made, and then assembled and docked after the internal welding; 4): Install and weld the slotted cover plate (11). After all the baffles and stiffeners inside the lower box body (1) are inspected and qualified, the slotted cover plate (11) is hoisted and positioned. The slot of the slotted cover plate (11) and the vertical inner baffle (13) are welded and fixed by full penetration welds in the form of backing plate welding grooves; 5): positioning each plate in the Y-shaped fork box assembly (3), and sequentially accurately positioning the tie plate (31), the Y-shaped fork angle plate (32), the Y-shaped fork box partition plate (33), the Y-shaped fork inclined plate (34), and a group of Y-shaped fork inner angle plates (35) using a three-dimensional spatial coordinate method to ensure the spatial dimensions of each contact point and contact surface; 6): After the installation and positioning of each plate in the previous step are qualified, self-inspection and mutual inspection are carried out. After confirmation that they are correct, they are submitted to the full-time inspector and reported to the on-site supervisor for acceptance. After passing the inspection, welding can be carried out. The Y-shaped fork box partition (33), the Y-shaped fork inclined plate (34) and the box wall plate are symmetrically welded by an even number of welders. In order to effectively reduce the overall welding deformation, the welding is carried out by CO2 gas shielded welding with a small line energy. The main welds at the four corners of the main body are welded by submerged arc automatic welding to ensure the welding quality. After welding, the welds are cleaned and inspected; 7): When welding between components, the interlayer temperature is controlled between 200℃ and 250℃; in order to maintain this temperature, when welding thick plates, continuous welding is required to be completed in one operation, and when the component length L>10 meters, the thick plate cools faster during the welding process, so the preheating temperature is always maintained during the welding process to prevent the interlayer temperature from dropping due to rapid cooling after welding. When welding, the insulation board can be covered immediately after welding to prevent the temperature of the welding area from cooling too quickly; 8): When installing the components, the center line and outer edge of the second box body web (37) are aligned with the ground position line when the bending and twisting plate is positioned, and the degree of fit between the end of the bending and twisting plate and the ground position is controlled. After the positioning is correct, it is firmly spot welded with the angle plates on both sides; when positioning the components, the top sealing plate is used as the positive end for assembly positioning, and the margin is placed on the side of the docking port. The local flatness of the component does not exceed 2mm, the overall dimension is ±1mm, and the assembly reference line is ±0.5mm; 9): Integrity acceptance: after the flaw detection is qualified, the node will be hoisted onto the tire frame for positioning again. The horizontality of the tire frame must be re-checked again, and the positioning is still based on the center line of the box; 10): After the components are positioned, the production staff will conduct a comprehensive and detailed measurement of the second box body web (37) body, node bracket, port dimensions and other major control dimensions. Exceeding tolerances will be corrected. After passing the inspection, the entire component will be inspected using a combination of ground sampling method and total station.

5. The working method of the Y-shaped tree-like special-shaped thick plate steel column according to claim 4 is characterized in that: The tolerance requirement for the marking of the tie plate (31) in step 5) is: Parallelism of both sides of the tie plate (31): ≯1mm; Length and width error: ≯1mm; Long side straightness: ≯1.5mm; End face non-perpendicularity: ≤1mm.

6. The working method of the Y-shaped tree-like special-shaped thick plate steel column according to claim 4 is characterized in that: After the second box body web (37) is manufactured, it is inspected by using a sampling box detection method to ensure the forming quality of the bending and twisting web, and the finely processed and pressed part plate is hoisted onto the sample box again to detect the bending and twisting plate for secondary processing torsion, and the corresponding position is marked with a marker pen; Steels that fail the inspection shall be corrected by cold working. After correction, there shall be no obvious concave surfaces or damage on the surface of the steel. The depth of scratches shall not exceed 0.5mm and shall not be greater than 1 / 2 of the negative allowable deviation of the thickness of the steel.

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