Module assembly type steel anchor beam, assembly jig frame and method

Abstract

The invention discloses a module assembly type steel anchor beam, an assembly jig frame and a method. An assembly structure of the steel anchor beam comprises perfect round bolt holes evenly distributed in horizontal side plates of steel corbel unit modules and long round bolt holes evenly distributed in bottom plates of anchor beam unit modules. The assembling jig frame comprises a base unit, a stand column unit and a supporting unit. The three units of the steel anchor beam are connected in an assembled mode by arranging hole groups in different shapes, rapid assembly and accurate alignment adjustment during assembly are guaranteed, assembly, installation and precision control are easy, the situation that welding quality (deformation) is affected due to narrow structural space is avoided, welding work is reduced, and meanwhile bolting connection construction efficiency is greatly improved. According to the assembly jig frame, positioning adjustment of the steel corbel unit modules on the two sides can be achieved, meanwhile, the assembly requirements of steel anchor beams of different sizes can be met, and the technical problems that in a traditional manufacturing technology, steel anchor beams are difficult to control in precision and difficult to assemble on site, and jig frames are continuously converted and manufactured are solved.

Description

Technical Field

[0001] This invention relates to the field of steel anchor beam manufacturing technology, and in particular to a modular assembled steel anchor beam, an assembly jig, and a method thereof. Background Technology

[0002] Steel anchor beam structures are widely used in cable-stayed bridges, primarily to anchor the stay cables and ensure the stability and safety of the bridge. The steel anchor beams are layered within the tower columns of the main tower, transferring the tension of the stay cables to the main tower, distributing and bearing the bridge's load, and ensuring the overall structural safety of the bridge. During construction, the steel anchor beams also provide a stable platform for the installation and adjustment of the stay cables, ensuring construction accuracy and efficiency. Therefore, the design and installation of steel anchor beams require strict control over positioning accuracy to ensure the fulfillment of their main functions.

[0003] Currently, existing steel anchor beam structures are typically fabricated as individual components, including anchor beam unit modules, steel bracket unit modules, and cable guide unit modules. The assembly of the steel anchor beam mainly involves positioning and assembling the anchor beam unit modules and steel bracket unit modules, which are currently connected by welding. Due to the difficulty in controlling precision during fabrication and the significant deformation during the process, the pre-existing welding gap between the steel anchor beam unit modules and the steel bracket unit modules is relatively small. Figure 9 As shown in the figure, this results in a small welding operation space, which brings great difficulties to the construction while ensuring the welding strength. Summary of the Invention

[0004] To address the aforementioned problems, this invention aims to provide a modular steel anchor beam, an assembly jig, and a method. Addressing the technical challenges of limited operating space and difficulty in precision control within the steel anchor beam structure, a novel connection method for the steel anchor beam structure is proposed. By rationally dividing the steel anchor beam structure and improving the connection relationships, the construction accuracy of the steel anchor beam is significantly improved. Furthermore, based on the proposed structural division and connection methods of the steel anchor beams, a detachable assembly jig and assembly method for rapid assembly of the steel anchor beams are designed.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows: a modular assembled steel anchor beam, comprising an anchor beam unit module, two steel bracket unit modules, and two cable guide unit modules. The two steel bracket unit modules are arranged opposite to each other, and the inner side of the steel bracket unit module has horizontal side plates evenly distributed with circular bolt holes and first positioning pin holes; the bottom plate of the anchor beam unit module has elongated bolt holes and second positioning pin holes evenly distributed at both ends, the elongated bolt holes being arranged along the length direction of the anchor beam unit module; the bottom plate of the anchor beam unit module sits on the horizontal side plates of the two steel bracket unit modules, and the circular bolt holes and elongated bolt holes are aligned vertically, and the first positioning pin holes and second positioning pin holes can be aligned vertically by adjusting the distance between the center of the circular bolt hole and the center of the elongated bolt hole; After the anchor beam unit module and the two steel bracket unit modules are precisely positioned by inserting positioning pins through the first positioning pin hole and the second positioning pin hole, the anchor beam unit module and the steel bracket unit module are fixedly connected by inserting bolt pairs through the round bolt hole and the oblong bolt hole one by one and tightening them. The cable guide unit module is fixedly connected to the upright plate of the steel bracket unit module through its flange, and the inner end of the cable guide extends into the anchor box on the anchor beam unit module, making the cable guide coaxial with the anchor box.

[0006] The assembly frame includes a base unit, four column units and four support units, with the four column units and four support units symmetrically arranged at both ends of the base unit and the support units located between the column units; The base unit is symmetrically provided with multiple sets of first elongated holes at both ends. The column unit is composed of a first base, a first column vertically arranged above the first base, and a horizontal seat plate arranged at the top of the first column. The first base is provided with a first circular hole that aligns with the first elongated hole, and the first base is bolted to both ends of the base unit by inserting bolts through the first elongated hole and the first circular hole. The support unit consists of a second base, a second column vertically arranged above the second base, and an inclined plate at the top of the second column. The second base is provided with a second circular hole that aligns with the first elongated hole, and the second base is bolted to both ends of the base unit by bolts passing through the first elongated hole and the second circular hole.

[0007] Preferably, the base unit consists of two longitudinal beams and a crossbeam spaced between the two longitudinal beams, and the first elongated hole is symmetrically arranged at both ends of the two longitudinal beams.

[0008] Preferably, both the first base and the second base are composed of a base plate, two stiffening plates and two vertical plates; the first column and the second column are welded to the middle of the base plate, and the first circular hole and the second circular hole are set on the base plate; Two stiffening plates are flatly mounted on the top of the base plate and located on both sides of the column, and the stiffening plates are provided with a second elongated hole that aligns with the circular hole; two vertical plates are symmetrically arranged on both sides of the column, each including a vertical plate welded to the stiffening plate and a side plate flatly mounted on the side wall of the column, and the vertical plates are fixedly connected to the column by bolts passing through the side plates, the column, and the side plates in sequence.

[0009] Preferably, the first column consists of an outer sleeve and an inner column that is slidably inserted into the outer sleeve. The horizontal seat plate is located at the top of the inner column, and a tightening screw is provided on the side wall of the outer sleeve. The height of the horizontal seat plate is adjusted by sliding the inner column up and down, and the height is positioned by tightening it against the outer wall of the inner column with the tightening screw.

[0010] Preferably, an adjusting rod is horizontally provided on the first column.

[0011] A method for assembling a steel anchor beam using the assembly jig described above includes the following steps: S1. Set three vertical center baselines on the two steel bracket unit modules and the anchor beam unit module respectively, and set three horizontal baselines corresponding to the vertical center baselines on the base unit. S2. Place two steel bracket unit modules symmetrically between the column unit and the support unit, and align the vertical center baseline on the steel bracket unit module with the horizontal baseline on the base unit. S3. Move the four support units so that the inclined seat plate is flush with the inclined surface inside the steel bracket unit module, and tighten the bolts to fix the support units on the base unit. S4. Move the four column units so that the horizontal base plate is vertically abutted against the shear nails on the outside of the steel bracket unit module. Tighten the bolts to fix the column units on the base unit, so that the vertical center baseline of the steel bracket unit module is plumb. S5. Place the steel anchor beam unit module between the two steel bracket unit modules, and align the vertical center baseline on the anchor beam unit module with the horizontal baseline on the base unit. The circular bolt holes and the oblong bolt holes are aligned vertically. The first positioning pin hole and the second positioning pin hole can be aligned vertically by adjusting the distance between the center of the circular bolt hole and the center of the oblong bolt hole. S6. After accurately positioning the anchor beam unit module and the two steel bracket unit modules by inserting positioning pins into the first positioning pin hole and the second positioning pin hole, the anchor beam unit module and the steel bracket unit module are fixedly connected by inserting bolt pairs into the round bolt hole and the oblong bolt hole one by one and tightening them. S7. The cable guide unit module is fixedly connected to the upright plate of the steel bracket unit module through its flange, and the inner end of the cable guide extends into the anchor box on the anchor beam unit module, and the cable guide is coaxial with the anchor box.

[0012] Preferably, in S4, the height of the horizontal seat plate can also be adjusted by lifting the first column to ensure that the horizontal seat plate abuts against the shear stud.

[0013] Preferably, before S5, the top rod can be rotated to make its end press tightly against the outer wall of the upright plate of the steel bracket unit module, so as to ensure that the inclined seat plate is in close contact with the inclined surface inside the steel bracket unit.

[0014] The beneficial effects of this invention are: 1) The three units of the steel anchor beam are connected by a group of holes of different shapes in an assembly manner, which ensures rapid assembly and precise alignment during assembly. It is easy to assemble, install and control precision, avoids the impact of the small structural space on welding quality (deformation), reduces welding work, and greatly improves the construction efficiency of bolted connection.

[0015] 2) The assembly jig can realize the positioning and adjustment of the steel bracket unit modules on both sides, and at the same time, it can meet the assembly requirements of steel anchor beams of different sizes. It solves the technical problems of difficult precision control of steel anchor beams, difficult on-site assembly, and constant conversion of jigs in traditional manufacturing technology. Attached Figure Description

[0016] Figure 1 This is an overall assembly diagram of the steel anchor beam of the present invention.

[0017] Figure 2 This is a perspective view of the steel bracket unit module of the present invention.

[0018] Figure 3 This is a front view of the steel bracket unit module of the present invention.

[0019] Figure 4 This is a top view of the steel bracket unit module of the present invention.

[0020] Figure 5 This is a perspective view of the anchor beam unit module of the present invention.

[0021] Figure 6 This is a front view of the anchor beam unit module of the present invention.

[0022] Figure 7 This is a top view of the anchor beam unit module of the present invention.

[0023] Figure 8 This is a diagram showing the alignment of the circular bolt hole and the oblong bolt hole of the present invention.

[0024] Figure 9This is an assembly diagram showing the alignment of one side holes of the steel bracket unit module and the anchor beam unit module of the present invention.

[0025] Figure 10 This is a structural diagram of the assembly frame of the present invention.

[0026] Figure 11 This is a top view of the base unit of the present invention.

[0027] Figure 12 This is a diagram of the column unit of the present invention.

[0028] Figure 13 This is a top view of the column and base plate of the present invention.

[0029] Figure 14 This is a top view of the stiffening plate, vertical plate, and side plate of the present invention.

[0030] Figure 15 For the present invention Figure 13 and Figure 14 Assemble the top view.

[0031] Figure 16 This is a diagram of the supporting unit of the present invention.

[0032] Figure 17 This is a structural diagram of the liftable column of the present invention.

[0033] Figure 18 This is a baseline position diagram of the anchor beam unit module and the steel bracket unit module of the present invention.

[0034] Figure 19 This is a diagram showing the baseline positions on the assembly frame of the present invention (baselines 1, 3 and...). Figure 17 The baseline of the steel bracket unit module is aligned; baseline 2 and... Figure 17 (The baseline of the anchor beam unit module is aligned.)

[0035] Figure 20 This is a diagram of the module for positioning and supporting a steel bracket unit on the assembly frame according to the present invention.

[0036] Figure 21 For the present invention in Figure 19 Based on the positioning of the other side steel bracket unit module diagram.

[0037] Figure 22 For the present invention in Figure 20 The anchor beam unit modules were then placed on the foundation and the assembly drawing was adjusted.

[0038] In the diagram: 1-Steel bracket unit module; 2-Anchor beam unit module; 11-Upright plate; 12-Shear stud; 13-Horizontal connecting plate; 14-Steel bracket inclined surface; 1a-Round bolt hole; 1b-First positioning pin hole; 21-Base plate; 22-Anchor box; 2a-Oblong bolt hole; 2b-Second positioning pin hole; 31-Longitudinal beam; 31a-First oblong hole; 32-Crossbeam; 41-Base plate; 41a-First round hole; 42-First column; 421-Outer sleeve; 422-Inner column; 423-Tightening screw; 51-Horizontal seat plate; 52-Inclined seat plate; 61-Stretching plate; 61a-Second oblong hole; 62-Vertical plate; 63-Side plate; 7-Adjusting top rod; 8-Cable guide unit module. Detailed Implementation

[0039] To enable those skilled in the art to better understand the technical solutions of the present invention, the technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0040] This application provides a modular assembled steel anchor beam, such as Figure 2 , 4 As shown in Figures 5 and 7-9, the system comprises an anchor beam unit module 2, two steel bracket unit modules 1, and two cable guide unit modules 8. The two steel bracket unit modules 1 are arranged opposite each other, and the inner side of the steel bracket unit module 1 has a horizontal connecting plate with evenly distributed round bolt holes 1a and first positioning pin holes 1b. The bottom plate 21 of the anchor beam unit module 2 has evenly distributed elongated bolt holes 2a and second positioning pin holes 2b at both ends. The elongated bolt holes 2a are arranged along the length direction of the anchor beam unit module 2. This arrangement structure allows the middle anchor beam unit module 2 to be shifted and adjusted towards the steel bracket unit modules 1 at both ends, realizing the adjustment, alignment, and connection of the round bolt holes 1a and the elongated bolt holes 2a.

[0041] The bottom plate 21 of the anchor beam unit module 2 sits on the horizontal connecting plates of the two steel bracket unit modules 1 at both ends, and the circular bolt holes 1a and the oblong bolt holes 2a are aligned vertically. The first positioning pin hole 1b and the second positioning pin hole 2b can be aligned vertically by adjusting the distance between the center of the circular bolt hole 1a and the center of the oblong bolt hole 2a.

[0042] Then, after accurately positioning the anchor beam unit module 2 and the two steel bracket unit modules 1 by inserting positioning pins into the first positioning pin hole 1b and the second positioning pin hole 2b, the anchor beam unit module 2 and the steel bracket unit module 1 are fixedly connected by inserting bolt pairs into the round bolt hole 1a and the oblong bolt hole 2a one by one and tightening them.

[0043] Finally, the cable guide unit module 8 is fixedly connected to the upright plate 11 of the steel bracket unit module 1 through its flange, and the inner end of the cable guide on it extends into the anchor box 22 on the anchor beam unit module 2, so that the cable guide and the anchor box 22 are coaxial.

[0044] The modular steel anchor beam disclosed in this application, through the arrangement of holes in the steel anchor beam components, enables hole alignment and connection while allowing for manufacturing deformation errors during assembly, thus reducing the difficulty of manufacturing individual steel anchor beam components. Simultaneously, the use of multiple bolts for connection, combined with the original welding, improves the assembly quality (strength) of the steel anchor beam, solving the problem of insufficient weld strength due to the limited strength of single welds.

[0045] Based on the steel anchor beam assembled from the above modules, this application also provides an assembly jig for the steel anchor beam, such as... Figure 10-16 As shown, it includes a base unit, four column units and four support units, with the four column units and four support units symmetrically arranged at both ends of the base unit and the support units located between the column units.

[0046] like Figure 11 As shown, the base unit has multiple sets of first elongated oval holes 31a symmetrically arranged at both ends. The column unit consists of a first base, a first column 42 vertically arranged above the first base, and a horizontal seat plate 51 arranged at the top of the first column. The horizontal seat plate abuts against the bottom end of the shear nail 12 on the outside of the steel bracket unit module 1. The first base has a first circular hole 41a that aligns with the first elongated oval hole 31a, and the first base is bolted to both ends of the base unit by bolts passing through the first elongated oval hole 31a and the first circular hole 41a.

[0047] like Figure 10 , 16 As shown, the support unit consists of a second base, a second vertical column erected above the second base, and an inclined plate 52 at the top of the second column. The second base and the second column have the same structure as the first base and the first column 42. The inclined plate 52 is flush with and abuts against the inclined surface 14 of the steel bracket unit module 1. The second base has a second circular hole aligned with the first elongated hole 31a, and bolts are inserted through the first elongated hole 31a and the second circular hole to fasten the second base to both ends of the base unit.

[0048] Preferred, such as Figure 11 As shown, the base unit consists of two longitudinal beams 31 and a crossbeam 32 connected between the two longitudinal beams 31. Both the longitudinal beams 31 and the crossbeam 32 are preferably I-beams. The first elongated hole 31a is symmetrically arranged at both ends of the two longitudinal beams 31.

[0049] The steel brackets are positioned and supported from the inside and outside by the column units and support units on each side, allowing the steel bracket unit modules 1 on both sides to be relatively positioned with the anchor beam unit module 2 in the middle. Then, the bottom of the anchor beam unit module 2 can be quickly connected to the steel bracket unit modules 1 on both sides by drilling (during the drilling process, the anchor beam unit module 2 is finely adjusted to ensure that its elongated bolt holes 2a and the round bolt holes 1a at both ends are aligned). This assembly jig enables the rapid positioning and assembly of the steel bracket unit modules 1 at both ends and the anchor beam unit module 2 in the middle, effectively improving assembly efficiency.

[0050] Because the steel bracket unit module 1 has a large weight, and it also needs to support the weight of the anchor beam unit module 2 during assembly, in order to improve the verticality of the support for the steel bracket unit module 1, such as... Figure 12 As shown, the column unit and support unit are each equipped with vertical support components on both sides of their respective columns. The first base and second base are each composed of a base plate 41, two stiffening plates 61, and two stiffening ribs. The two stiffening plates 61 are flatly mounted above the base plate 41 and located on both sides of the first column 42 and the second column, and each stiffening plate 61 has a second elongated hole 61a aligned with the circular hole. The two stiffening ribs are symmetrically arranged on both sides of the first and second columns, each including a vertical plate 62 welded to the stiffening plate 61 and a side plate 63 flatly mounted on the sidewall of the first and second columns. Bolts are used to sequentially pass through the side plate 63, the first column, the second column, and the side plate 63 to fix the stiffening ribs to the first and second columns. The vertical plate 62 and the stiffening plate 61 form a right-angle structure, providing vertical support to the first and second columns on both sides, thereby vertically supporting the weight of the steel bracket unit module 1 and the anchor beam unit module 2.

[0051] The stiffening plate 61 can be moved and adjusted on the base plate 41 through the second elongated hole 61a, allowing the side plate 63 to be flat against the side walls of columns of different widths, thus improving the vertical support effect of the column. Furthermore, the second elongated hole 61a and the connecting hole allow for the overall disassembly of the vertical support component, facilitating its separate fabrication from the column unit. Similarly, the adjustability, disassembly, and separate fabrication of this vertical support component are applicable to the support unit.

[0052] To ensure the horizontal seat plate is adapted to the height of the shear stud 12, such as... Figure 17 As shown, the first column consists of an outer sleeve 421 and an inner column 422 that is slidably inserted into the outer sleeve 421. The horizontal seat plate is located at the top of the inner column 422, and a tightening screw 423 is provided on the side wall of the outer sleeve 421. The height of the horizontal seat plate is adjusted by sliding the inner column 422 up and down, and the height is positioned by tightening the inner column 422 on the outer wall of the inner column 422 with the tightening screw, so that the horizontal seat plate abuts against the shear nail 12.

[0053] like Figure 20 As shown, since the inclined seat plate 52 of the support unit provides inclined support to the steel bracket unit module 1, under the weight of the steel bracket unit module 1, it will slide obliquely downward along the inclined surface of the inclined seat plate 52. Figure 20 As indicated by the middle arrow, the shear stud 12 also slides horizontally outward on the horizontal seat plate 51 of the column unit, causing a change in the positioning state of the steel bracket unit module 1. Therefore, to solve this problem and improve the positioning accuracy of the steel bracket unit module 1, such as... Figure 21 As shown, an adjusting rod 7 is horizontally arranged on the first column. The adjusting rod 7 is preferably a screw. After the steel bracket unit module 1 is positioned by the column unit and the support unit, the adjusting rod 7 is rotated so that its end abuts against the outer wall of the upright plate 11 of the steel bracket unit module 1, thereby resisting the downward trend of the steel bracket unit module 1 along the inclined seat plate 52 and improving its positioning accuracy.

[0054] This application also provides a method for assembling a steel anchor beam using the above-mentioned assembly jig, comprising the following steps: S1. Set three vertical center baselines on the two steel bracket unit modules 1 and the anchor beam unit module 2 respectively, and set three horizontal baselines corresponding to the vertical center baselines on the base unit.

[0055] S2. Place two steel bracket unit modules 1 symmetrically between the column unit and the support unit, and align the vertical center baseline on the steel bracket unit module 1 with the horizontal baseline on the base unit.

[0056] S3. Move the four support units so that the inclined seat plate 52 is flush with the inclined surface inside the steel bracket unit module 1, and tighten the bolts to fix the support units on the base unit.

[0057] S4. Move the four column units so that the horizontal seat plate vertically abuts against the shear nail 12 on the outside of the steel bracket unit module 1. Tighten the bolts to fix the column units to the base unit, making the vertical center baseline of the steel bracket unit module 1 plumb. Alternatively, the height of the horizontal seat plate can be adjusted by raising and lowering the first column to ensure that the horizontal seat plate abuts against the shear nail 12. At the same time, the top rod 7 can be rotated to make its end press tightly against the outer wall of the upright plate 11 of the steel bracket unit module 1 to ensure that the inclined seat plate 52 is in close contact with the inclined surface on the inner side of the steel bracket unit.

[0058] S5. Place the steel anchor beam unit module 2 between the two steel bracket unit modules 1, and align the vertical center baseline on the anchor beam unit module 2 with the horizontal baseline on the base unit. The circular bolt holes 1a and the oblong bolt holes 2a are aligned vertically. The first positioning pin hole 1b and the second positioning pin hole 2b can be aligned vertically by adjusting the distance between the center of the circular bolt hole 1a and the center of the oblong bolt hole 2a.

[0059] S6. After accurately positioning the anchor beam unit module 2 and the two steel bracket unit modules 1 by inserting positioning pins into the first positioning pin hole 1b and the second positioning pin hole 2b, the anchor beam unit module 2 and the steel bracket unit module 1 are fixedly connected by inserting bolt pairs into the round bolt hole 1a and the oblong bolt hole 2a one by one and tightening them.

[0060] S7. The cable guide unit module 8 is fixedly connected to the upright plate 11 of the steel bracket unit module 1 through its flange, and the inner end of the cable guide on it extends into the anchor box 22 on the anchor beam unit module 2, and the cable guide is coaxial with the anchor box 22.

[0061] like Figure 19 As shown, the adjustment range between the oblong bolt hole 2a and the circular bolt hole 1a is preferably ±2mm.

[0062] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Various changes and modifications can be made to the present invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of protection claimed by the present invention.

Claims

1. A modular assembled steel girder, characterized by: The steel anchor beam comprises an anchor beam unit module, two steel bracket unit modules and two cable guide pipe unit modules, the two steel bracket unit modules are oppositely arranged, and the inside of the steel bracket unit module is provided with uniformly distributed right circular bolt holes and first positioning pin holes on the horizontal side plates; the bottom plate of the anchor beam unit module is provided with uniformly distributed long circular bolt holes and second positioning pin holes at both ends, and the long circular bolt holes are arranged along the length direction of the anchor beam unit module; the bottom plate of the anchor beam unit module is seated on the horizontal side plates of the two steel bracket unit modules at both ends, and the right circular bolt holes and the long circular bolt holes are vertically aligned one by one, and the first positioning pin holes and the second positioning pin holes can be vertically aligned by adjusting the spacing between the center of the right circular bolt hole and the center of the long circular bolt hole; After the anchor beam unit module and the two steel bracket unit modules are accurately positioned by inserting positioning pins into the first positioning pin holes and the second positioning pin holes, the anchor beam unit module and the steel bracket unit modules are fixedly connected by inserting bolt pairs into the right circular bolt holes and the long circular bolt holes one by one and fastening. The cable guide pipe unit module is fixedly connected to the vertical plate of the steel bracket unit module through the flange thereon, and the inner end of the cable guide pipe extends into the anchor box on the anchor beam unit module, and the cable guide pipe is coaxial with the anchor box.

2. An assembly jig for a steel girder as claimed in claim 1, characterised in that: The base unit, the four column units and the four support units are symmetrically arranged at both ends of the base unit, and the support units are located between the column units. The two ends of the base unit are symmetrically provided with a plurality of groups of first long circular holes, the column unit comprises a first base, a first column vertically arranged above the first base and a horizontal seat plate arranged at the top end of the first column, the first base is provided with a first right circular hole aligned with the first long circular hole, and the first base is bolted at both ends of the base unit by inserting bolts into the first long circular hole and the first right circular hole. The support unit comprises a second base, a second column vertically arranged above the second base and an inclined seat plate arranged at the top end of the second column, the second base is provided with a second right circular hole aligned with the first long circular hole, and the second base is bolted at both ends of the base unit by inserting bolts into the first long circular hole and the second right circular hole.

3. The tire building former of claim 2, wherein: The base unit comprises two longitudinal beams and a cross beam connected between the two longitudinal beams, and the first long circular holes are symmetrically arranged at both ends of the two longitudinal beams.

4. The tire building band as set forth in claim 2, wherein: The first base and the second base each comprise a base plate, two stiffening plates and two vertical plates, the first column and the second column are welded in the middle of the base plate, and the first right circular hole and the second right circular hole are arranged on the base plate; The two stiffening plates are arranged above the base plate and located on both sides of the column, and the stiffening plates are provided with second long circular holes aligned with the right circular holes, and the two vertical plates are symmetrically arranged on both sides of the column and each comprise a vertical plate welded on the stiffening plate and a side plate pasted on the side wall of the column, and the vertical plate and the column are fixedly connected by sequentially inserting bolts through the side plate, the column and the side plate.

5. An assembly jig according to claim 2 or 4, wherein: The first stand is composed of an outer sleeve and an inner column slidingly inserted into the outer sleeve, the horizontal seat plate is arranged at the top end of the inner column, and a jacking screw is arranged on the side wall of the outer sleeve, the height of the horizontal seat plate is adjusted by sliding the inner column up and down, and the height is positioned by jacking the outer wall of the inner column by the jacking screw.

6. An assembly as claimed in claim 2 or 4 or 5, wherein: An adjusting top rod is arranged horizontally on the first stand.

7. A method of assembling a steel anchorage beam using the assembly jig of claim 2, wherein The method comprises the following steps: S1, three vertical center baselines are arranged on two steel corbel unit modules and anchor beam unit modules respectively, and three horizontal baselines corresponding to the vertical center baselines are arranged on the base unit; S2, the two steel corbel unit modules are symmetrically arranged between the stand unit and the support unit, and the vertical center baselines on the steel corbel unit modules are aligned with the horizontal baselines on the base unit; S3, the four support units are moved, so that the inclined seat plates abut against the inclined surfaces on the inner sides of the steel corbel unit modules, and the support units are fixed on the base unit by fastening bolts; S4, the four stand units are moved, so that the horizontal seat plates abut against the shear nails on the outer sides of the steel corbel unit modules vertically, and the stand units are fixed on the base unit by fastening bolts, so that the vertical center baselines of the steel corbel unit modules are plumb; S5, the steel anchor beam unit module is arranged between the two steel corbel unit modules, and the vertical center baselines on the anchor beam unit module are aligned with the horizontal baselines on the base unit, the right circular bolt holes and the oblong bolt holes are vertically aligned one by one, and the first positioning pin hole and the second positioning pin hole can be vertically aligned by adjusting the distance between the center of the right circular bolt hole and the center of the oblong bolt hole; S6, after the steel anchor beam unit module and the two steel corbel unit modules are accurately positioned by inserting positioning pin bolts into the first positioning pin hole and the second positioning pin hole, the steel anchor beam unit module and the steel corbel unit modules are fixedly connected by inserting bolt pairs into the right circular bolt holes and the oblong bolt holes one by one and fastening; S7, the cable guide pipe unit module is fixedly connected to the vertical plate of the steel corbel unit module through the flange thereon, and the inner end of the cable guide pipe extends into the anchor box on the anchor beam unit module, and the cable guide pipe is coaxial with the anchor box.

8. The method of claim 7, wherein: In S4, the height of the horizontal seat plate can also be adjusted by lifting the first stand, so as to ensure that the horizontal seat plate abuts against the shear nails.

9. The method of claim 7, wherein: Before S5, the end of the adjusting top rod can also be tightly abutted against the outer wall of the vertical plate of the steel corbel unit module by rotating the adjusting top rod, so as to ensure that the inclined seat plate tightly abuts against the inclined surface on the inner side of the steel corbel unit.

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