Hoisting structure suitable for single-partition-plate steel box girder

Abstract

The utility model relates to a hoisting structure suitable for a single-partition-plate steel box girder, which comprises the single-partition-plate steel box girder, a small stiffening plate is mounted in the single-partition-plate steel box girder, and a top plate of the single-partition-plate steel box girder is connected with a steel girder temporary hoisting point positioned right above a transverse partition plate and a dragging bracket positioned right above the small stiffening plate; and the steel box girder lifting appliance comprises a short carrying pole beam, the short carrying pole beam is connected with the steel girder temporary lifting point, and a guide chain is connected between the short carrying pole beam and the dragging bracket. Compared with the mode that an original lifting appliance carries out steel beam multi-point lifting through a main beam, the improved new lifting appliance achieves rapid modification from four-point lifting to two-point lifting. And if the single-partition-plate steel box girder adopts four-point hoisting, four lifting lugs are required and two transverse partition plates are additionally arranged in the single-partition-plate steel box girder, and when double lifting lugs are adopted for hoisting, the lifting lugs are directly arranged on top plates positioned on the transverse partition plates, so that the use amount of reinforcing steel in the steel girder is reduced, and the hoisting construction efficiency is improved.

Description

Technical Field

[0001] The present application relates to the technical field of bridge engineering construction, and in particular to a hoisting structure suitable for a single-diaphragm steel box girder. Background Art

[0002] With the rise of large-scale lifting equipment, large-segment assembly is commonly used in steel bridge construction. However, large-segment bridges have significant thermal expansion and contraction effects. To ensure the smooth closure of steel beam segments, the length of the closure section is often set shorter. This also leads to the situation where single-diaphragm steel box beam segments are prone to appear in the closure section.

[0003] Existing large-scale lifting equipment lifts steel beam segments through a sling. The sling is set between the crane and the object to be lifted, and is connected to the hook and the steel beam ear plates through the ear plates on the top and bottom of the sling respectively. In order to save the amount of steel used in the crane and the sling, the steel beam ear plates are often set on the top plate at the position of the cross-partition. For steel beam segments with multiple cross-partitions, since the stress limit of multiple cross-partitions is higher, the sling is connected to the lifting ears on the end partition to lift the steel beam segment smoothly.

[0004] However, when the existing lifting equipment is applied to single-diaphragm steel box girder segments, the following defects will exist: if all the ear plates of the single-diaphragm steel box girder are set on the top plate at the same partition position, because the force center of gravity is concentrated on a local part of the steel box girder, there will be a risk of system instability and damage caused by local deformation during lifting.

[0005] In addition, after the single-diaphragm steel box girder segment is hoisted to the design elevation, the existing hoisting equipment generally does not have a special device for adjusting the posture, and the alignment posture of the steel beam is difficult to adjust, which will make the hoisting construction more difficult. If the above hoisting problem is solved by adding a new transverse diaphragm inside the steel beam segment to form a multi-diaphragm structure and setting ear plates on the top plate of the diaphragm, the new diaphragm will be larger in size, have many stiffening plates, and be heavy, which will increase the material cost and delay the construction period. Summary of the invention

[0006] An embodiment of the present application provides a hoisting structure suitable for a single-diaphragm steel box girder to solve the problem of hoisting construction of a single-diaphragm steel box girder at a steel bridge joint section in the related technology, namely, how to meet the force requirements of hoisting of the single-diaphragm steel box girder while ensuring hoisting safety and retaining part of the original hoisting equipment structure, and saving construction time and material costs.

[0007] The embodiment of the present application provides a hoisting structure applicable to a single diaphragm steel box girder, comprising:

[0008] A single-diaphragm steel box girder, wherein a small stiffening plate is installed in the single-diaphragm steel box girder, and the top plate of the single-diaphragm steel box girder is connected with a temporary steel beam hanging point located directly above the transverse diaphragm and a pulling bracket located directly above the small stiffening plate;

[0009] A steel box girder hoist comprises a short shoulder pole beam, the short shoulder pole beam is connected to a temporary hanging point of the steel beam, and a guide chain is connected between the short shoulder pole beam and the pulling bull leg.

[0010] In some embodiments: two small stiffening plates are provided, the two small stiffening plates are fixed on the inner wall of the top plate of the single-diaphragm steel box girder, and the two small stiffening plates are respectively located in the front and rear directions of the transverse diaphragm.

[0011] In some embodiments: the guide chain is a manual guide chain or an electric fall chain, one end of the guide chain is connected to the short shoulder beam, and the other end is connected to the pulling bull leg. The guide chain adjusts the lifting posture of the single-diaphragm steel box girder by changing its own length.

[0012] In some embodiments: the short shoulder beam includes a short shoulder beam main beam, an upper ear plate, and a lower ear plate. The upper ear plate is provided with a pair and is located at the upper part of the short shoulder beam main beam, and the lower ear plate is provided with a pair and is located at the lower part of the short shoulder beam main beam.

[0013] In some embodiments: the short shoulder beam further includes an upper ear plate stiffening plate and a lower ear plate stiffening rib, the upper ear plate stiffening plate is connected between the upper ear plate and the short shoulder beam main beam, and the lower ear plate stiffening rib is connected between the lower ear plate and the short shoulder beam main beam.

[0014] In some embodiments: the steel box girder hanger is also connected to a hanger main ear plate, the hanger main ear plate and the steel box girder hanger are connected via a hanger main pin, and the spacing between the hanger main ear plates should be greater than the spacing between the upper ear plates of the short shoulder beam.

[0015] In some embodiments: the spacing between the temporary hanging points of the steel beam is equal to the spacing between the lower ear plates of the short pole beam.

[0016] In some embodiments: the small stiffening plate includes a longitudinal stiffening plate, a transverse stiffening plate and a bottom stiffening plate, the longitudinal stiffening plate is arranged on the inner wall of the top plate before and after the transverse diaphragm of the single diaphragm steel box girder, the transverse stiffening plate is arranged under the longitudinal stiffening plate, and the bottom stiffening plate is arranged on both sides of the connection between the longitudinal stiffening plate and the top plate.

[0017] In some embodiments: the pulling corbel includes a pulling corbel ear plate and a pulling corbel stiffening plate, the pulling corbel ear plate is arranged on the single-diaphragm steel box girder and is in the same longitudinal plane as the longitudinal stiffening plate, and the pulling corbel stiffening plate is located on both sides of the pulling corbel ear plate and is in the same longitudinal plane as the bottom stiffening plate.

[0018] In some embodiments: the small stiffening plate, temporary hanging point of steel beam and pulling corbel are welded and connected with the single diaphragm steel box beam by arc welding or submerged arc welding.

[0019] Compared with the prior art, the beneficial effects of the hoisting structure suitable for single-diaphragm steel box beam proposed by the present invention are as follows:

[0020] 1. This application is applicable to the lifting structure of the single-diaphragm steel box girder. The existing lifting equipment is modified by using the short shoulder beam that can be processed on the construction site. Compared with the original lifting equipment that lifts the steel beam at multiple points through the main beam, the modified new lifting equipment realizes the rapid transformation from four-point lifting to two-point lifting. If the single-diaphragm steel box girder adopts four-point lifting, there must be four lifting ears and two new transverse partitions in the single-diaphragm steel box girder. When double lifting ears are used for lifting, the lifting ears are directly set on the top plate located on the transverse partition, which not only reduces the amount of reinforcing steel inside the steel beam, but also improves the efficiency of the lifting construction.

[0021] 2. The present application is applicable to the hoisting structure of a single-diaphragm steel box girder. Small stiffening plates are welded on the inner wall of the top plate before and after the transverse diaphragm of the single-diaphragm steel box girder to reinforce the single-diaphragm steel box girder. Compared with the method of adding a new transverse diaphragm inside the single-diaphragm steel box girder to form a multi-diaphragm structure to meet the force requirements of lifting, the present application fully utilizes the bearing capacity of the original transverse diaphragm of the single-diaphragm steel box girder to meet the force requirements of lifting without adding a large amount of reinforcing steel, thereby saving material costs.

[0022] 3. The present application is applicable to the lifting structure of the single-diaphragm steel box girder, and a guide chain is installed on the steel box girder lifting fixture. Compared with the existing lifting fixture using a single telescopic cylinder structure, the present application uses a guide chain to fix the single-diaphragm steel box girder, which not only stabilizes the single-diaphragm steel box girder and ensures that it does not twist, but also can achieve the function of fine-tuning the posture of the single-diaphragm steel box girder. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0024] Figure 1 It is a front view of the existing spreader;

[0025] Figure 2 A front view of a hanger structure suitable for a single-diaphragm steel box girder provided in an embodiment of the present application;

[0026] Figure 3 A side view of a hanger structure suitable for a single-diaphragm steel box girder provided in an embodiment of the present application;

[0027] Figure 4 A schematic diagram of the structure of a short shoulder beam provided in an embodiment of the present application;

[0028] Figure 5 A schematic diagram of the cross-sectional structure of a short shoulder pole beam provided in an embodiment of the present application;

[0029] Figure 6 This is a schematic diagram of the structure of the connection between the small stiffening plate, the pulling corbel and the top plate of the embodiment of the present application;

[0030] Figure 7 This is a schematic diagram of the cross-sectional structure of the small stiffening plate and the pulling corbel according to an embodiment of the present application.

[0031] Reference numerals:

[0032] 1. Wire rope; 2. Main ear plate of hoist; 3. Main beam of hoist; 4. Telescopic cylinder; 5. Pull plate; 6. Kingpin shaft of hoist; 7. Short shoulder beam; 71. Main beam of short shoulder beam; 72. Upper ear plate; 73. Lower ear plate; 8. Temporary lifting point of steel beam; 9. Small stiffening plate; 91. Longitudinal stiffening plate; 92. Transverse stiffening plate; 93. Bottom stiffening plate; 10. Pulling corbel; 101. Pulling corbel ear plate; 102. Pulling corbel stiffening plate; 11. Guide chain; 12. Single diaphragm steel box beam. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0034] The embodiment of the present application provides a hoisting structure suitable for a single-diaphragm steel box girder, which can solve the problem of hoisting construction of a single-diaphragm steel box girder at the joint section of a steel bridge in the related technology, namely, how to meet the force requirements of hoisting of the single-diaphragm steel box girder while ensuring hoisting safety and retaining part of the original hoisting equipment structure, and saving construction time and material costs.

[0035] See also Figure 2 and Figure 3 As shown, the embodiment of the present application provides a hoisting structure suitable for a single diaphragm steel box girder, the hoisting structure mainly comprises: Figure 1 The existing lifting device shown in the figure (hereinafter referred to as the original lifting device, which includes a steel wire rope 1, a lifting device main ear plate 2, a lifting device main beam 3, a telescopic cylinder 4, a pull plate 5 and a lifting device main pin 6) is reasonably modified (hereinafter referred to as the new lifting device, which is referred to as the modified lifting device) and is applied to the lifting construction of a single-diaphragm steel box beam. On this basis, the lifting structure includes:

[0036] A single diaphragm steel box girder 12 is provided with a small stiffening plate 9 installed therein, and the small stiffening plate 9 is arranged along the longitudinal direction of the single diaphragm steel box girder 12 to strengthen the local structure of the single diaphragm steel box girder 12. The top plate of the single diaphragm steel box girder 12 is connected with a temporary steel beam hanging point 8 located just above the transverse diaphragm (not shown in the figure) and a pulling bracket 10 located just above the small stiffening plate 9.

[0037] The number of temporary steel beam hanging points 8 is preferably, but not limited to, two, and the two temporary steel beam hanging points 8 are arranged along the transverse direction of the single-diaphragm steel box girder 12 to form two fixed hanging points on the top of the single-diaphragm steel box girder 12. The number of pulling brackets 10 is preferably, but not limited to, two, and the two pulling brackets 10 are arranged along the longitudinal direction of the single-diaphragm steel box girder 12. The connection line between the two pulling brackets 10 and the connection line between the two temporary steel beam hanging points 8 intersect to form a cross structure.

[0038] A steel box girder hoist comprises a short shoulder pole beam 7, which is connected to a temporary lifting point 8 for a steel beam, a guide chain 11 is connected between the short shoulder pole beam 7 and a pulling bull leg 10, the bottom of the short shoulder pole beam 7 is connected to the temporary lifting point 8 for the steel beam, the top of the short shoulder pole beam 7 is connected to a main ear plate 2 of the hoist via a main pin shaft 6 of the hoist, and the main ear plate 2 of the hoist is connected to the lifting equipment.

[0039] After the lifting equipment lifts the single-diaphragm steel box girder 12 to the set height through the steel box girder lifting device, the guide chain 11 connected between the short shoulder beam 7 and the pulling bull leg 10 is used to stabilize the single-diaphragm steel box girder 12 and ensure that the single-diaphragm steel box girder 12 does not twist during the lifting process. It can also realize the function of fine-tuning the posture of the single-diaphragm steel box girder 12.

[0040] During the specific construction and hoisting process of the single diaphragm steel box girder 12:

[0041] First, remove the main pin shaft 6 of the spreader on the main ear plate 2 of the spreader, and then remove all the components below the main ear plate 2 of the spreader (in this embodiment, the above-mentioned components to be removed include the spreader main beam 3, the pull plate 5, and the telescopic cylinder 4 of the original spreader).

[0042] Then, the short shoulder pole beam 7 is processed on site, the connecting holes of the main ear plate 2 of the sling are aligned with the connecting holes of the upper ear plate 72 of the short shoulder pole beam 7, and the main pin shaft 6 of the sling is inserted into the connecting holes at the same time and fixed to install the short shoulder pole beam 7 at the bottom of the main ear plate 2 of the sling, thereby forming a new sling.

[0043] Next, small stiffening plates 9 are welded to the inner walls of the top plates before and after the transverse diaphragms of the single-diaphragm steel box girder 12 to be hoisted to meet the force requirements for hoisting the single-diaphragm steel box girder 12, and temporary lifting points 8 and pulling corbels 10 of the steel beams are welded on the top of the single-diaphragm steel box girder 12 for subsequent hoisting equipment connection.

[0044] Then align the connection hole of the lower ear plate 73 of the short shoulder beam 7 with the connection hole of the temporary hanging point 8 of the steel beam, and use the pin to penetrate the connection holes at the same time and fix them to connect the single-diaphragm steel box beam 12 to the bottom of the steel box beam hanger.

[0045] Finally, the guide chain 11 is passed through the main pin shaft 6 of the hanger, and the two ends of the guide chain 11 are fixedly connected to the two pulling legs 10 on the top of the single-diaphragm steel box girder 12 to complete the installation of the guide chain 11.

[0046] The present application is applicable to the lifting structure of a single-diaphragm steel box girder, and utilizes a short shoulder beam 7 that can be processed on the construction site to modify the existing lifting equipment. Compared with the original lifting equipment that performs multi-point lifting of the steel beam through the main beam, the modified new lifting equipment realizes the rapid conversion from four-point lifting to two-point lifting.

[0047] If the single-diaphragm steel box girder 12 is lifted by four points, four lifting ears are required and two new transverse diaphragms are added inside the single-diaphragm steel box girder 12. When double-lifting ears are used for lifting, the lifting ears are directly set on the top plate located on the transverse diaphragm, which not only reduces the amount of reinforcing steel inside the steel beam, but also improves the efficiency of the lifting construction.

[0048] The present application is applicable to the hoisting structure of a single-diaphragm steel box girder, in which a small stiffening plate 9 is welded on the inner wall of the top plate before and after the transverse diaphragm of the single-diaphragm steel box girder 12 to reinforce the single-diaphragm steel box girder 12. This is compared to the method of adding a new transverse diaphragm inside the single-diaphragm steel box girder to form a multi-diaphragm structure to meet the force requirements of lifting.

[0049] Without adding a large amount of reinforcing steel, the present application fully utilizes the bearing capacity of the original transverse diaphragm of the single-diaphragm steel box girder 12 to meet the force requirements of lifting, thereby saving material costs.

[0050] The present application is applicable to the lifting structure of a single-diaphragm steel box girder, and a guide chain 11 is added to the steel box girder lifting fixture. Compared with the existing lifting fixture structure using a single telescopic cylinder, the present application uses the guide chain 11 to fix the single-diaphragm steel box girder 12, which not only stabilizes the single-diaphragm steel box girder 12 and ensures that it does not twist, but also can achieve the function of fine-tuning the posture of the single-diaphragm steel box girder 12.

[0051] In some alternative embodiments: See Figure 2 and Figure 3 As shown, an embodiment of the present application provides a hoisting structure suitable for a single-diaphragm steel box girder, the hoisting structure is provided with two small stiffening plates 9, the two small stiffening plates 9 are fixed on the inner wall of the top plate of the single-diaphragm steel box girder 12, and the two small stiffening plates 9 are respectively located in the front and rear directions of the transverse diaphragm.

[0052] The top plate located in the front and rear directions of the transverse diaphragm is a weak area for installing the pulling corbel 10. In order to strengthen the structural strength of the connection between the pulling corbel 10 and the single-diaphragm steel box girder 12, the embodiment of the present application installs two small stiffening plates 9 on the position of the pulling corbel 10 on the single-diaphragm steel box girder 12, so that when the guide chain 11 pulls the pulling corbel 10, the single-diaphragm steel box girder 12 will not be deformed.

[0053] In some alternative embodiments: See Figure 2 and Figure 3 As shown, the embodiment of the present application provides a lifting structure suitable for a single-diaphragm steel box girder, and the guide chain 11 of the lifting structure is a manual guide chain or an electric fall chain. One end of the guide chain 11 is connected to the main pin shaft 6 of the hoisting device on the short shoulder beam 7, and the other end is connected to the pulling bracket 10. The guide chain 11 adjusts the lifting posture of the single-diaphragm steel box girder 12 by changing its own length, and stabilizes the single-diaphragm steel box girder 12 and ensures that the single-diaphragm steel box girder 12 does not twist during the lifting process.

[0054] In some alternative embodiments: See Figure 4 and Figure 5 As shown, the embodiment of the present application provides a hoisting structure suitable for a single-diaphragm steel box girder, wherein the short shoulder beam 7 of the hoisting structure comprises a short shoulder beam main beam 71, an upper ear plate 72, and a lower ear plate 73. A pair of upper ear plates 72 are provided and are located at the upper part of the short shoulder beam main beam 71, and a pair of lower ear plates 73 are provided and are located at the lower part of the short shoulder beam main beam 71.

[0055] The short shoulder beam 7 also includes an upper ear plate stiffening plate and a lower ear plate stiffening rib. The upper ear plate stiffening plate is connected between the upper ear plate 72 and the short shoulder beam main beam 71 , and the lower ear plate stiffening rib is connected between the lower ear plate 73 and the short shoulder beam main beam 71 .

[0056] In this embodiment, one short shoulder beam main beam 71 is processed, two upper ear plates 72 are processed, four lower ear plates 73 are processed, two upper ear plate 72 stiffening plates are processed, and eight lower ear plate 73 stiffening ribs are processed.

[0057] At least two upper ear plates 72 are welded on the top surface of the short shoulder beam main beam 71, and upper ear plate stiffening plates are welded between every two upper ear plates 72; at least four lower ear plates 73 are welded on the bottom surface of the short shoulder beam main beam 71, and every two lower ear plates 73 form a group, and lower ear plate stiffening ribs are welded on the plate surface of the lower ear plates 73.

[0058] In some alternative embodiments: See Figure 2 and Figure 3As shown, the embodiment of the present application provides a hoisting structure suitable for a single-diaphragm steel box girder, the steel box girder hoist of the hoisting structure is also connected with a hoist main ear plate 2, the hoist main ear plate 2 and the steel box girder hoist are connected through a hoist main pin 6, and the spacing between the hoist main ear plates 2 should be greater than the spacing between the two upper ear plates 72 of the short pole beam 7. The spacing between the two steel beam temporary hoisting points 8 is equal to the spacing between the two sets of lower ear plates 73 of the short pole beam 7, and the diameters of each other are connected through a pin.

[0059] In some alternative embodiments: See Figure 6 and Figure 7 As shown, the embodiment of the present application provides a hoisting structure suitable for a single-diaphragm steel box girder, and the small stiffening plate 9 of the hoisting structure includes a longitudinal stiffening plate 91, a transverse stiffening plate 92 and a bottom stiffening plate 93. The longitudinal stiffening plate 91 is arranged on the inner wall of the top plate before and after the transverse diaphragm of the single-diaphragm steel box girder 12, and a transverse stiffening plate 92 is arranged under the longitudinal stiffening plate 91, and a bottom stiffening plate 93 is arranged on both sides of the connection between the longitudinal stiffening plate 91 and the top plate. The welding of the small stiffening plate 9 strengthens the structure of the steel beam, thereby improving the internal tensile and shear resistance force limits to meet the force requirements of the single-diaphragm steel box girder.

[0060] The pulling corbel 10 includes a pulling corbel ear plate 101 and a pulling corbel stiffening plate 102. The pulling corbel ear plate 101 is arranged on the single diaphragm steel box girder 12 and is in the same longitudinal plane as the longitudinal stiffening plate 91. The pulling corbel stiffening plate 102 is located on both sides of the pulling corbel ear plate 101 and is in the same longitudinal plane as the bottom stiffening plate 93. The pulling corbel stiffening plate 102 can increase the lateral rigidity of the pulling corbel ear plate 101 and ensure stability.

[0061] The welding method for welding the small stiffening plate 9, the temporary hanging point 8 of the steel beam and the pulling bracket 10 can be arc welding or submerged arc welding, but is not limited to the above welding methods. Targeted welding can be performed according to the welding methods familiar to technicians in this field to ensure that the connection between the small stiffening plate 9, the temporary hanging point 8 of the steel beam and the pulling bracket 10 is stable and suitable for subsequent lifting construction.

[0062] In the description of the present application, it should be noted that the terms "upper", "lower", etc. 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 application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0063] It should be noted that, in this application, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0064] The above description is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.

Claims

1. A hoisting structure suitable for a single diaphragm steel box girder, characterized in that: include: A single-diaphragm steel box girder (12), wherein a small stiffening plate (9) is installed inside the single-diaphragm steel box girder (12), and the top plate of the single-diaphragm steel box girder (12) is connected to a temporary steel beam hanging point (8) located directly above the transverse diaphragm and a pulling bracket (10) located directly above the small stiffening plate (9); A steel box girder lifting device, the steel box girder lifting device comprises a short shoulder beam (7), the short shoulder beam (7) is connected to the temporary lifting point (8) of the steel beam, and a guide chain (11) is connected between the short shoulder beam (7) and the pulling bull leg (10).

2. A hoisting structure suitable for a single diaphragm steel box girder as claimed in claim 1, characterized in that: Two small stiffening plates (9) are provided, and the two small stiffening plates (9) are fixed on the inner wall of the top plate of the single-diaphragm steel box girder (12), and the two small stiffening plates (9) are respectively located in the front and rear directions of the transverse diaphragm.

3. A hoisting structure suitable for a single diaphragm steel box girder as claimed in claim 1, characterized in that: The guide chain (11) is a manual guide chain or an electric fall chain. One end of the guide chain (11) is connected to the short shoulder beam (7), and the other end is connected to the pulling bull leg (10). The guide chain (11) adjusts the lifting posture of the single-diaphragm steel box girder (12) by changing its own length.

4. A hoisting structure suitable for a single diaphragm steel box girder as claimed in claim 1, characterized in that: The short shoulder beam (7) comprises a short shoulder beam main beam (71), an upper ear plate (72), and a lower ear plate (73); a pair of the upper ear plates (72) are provided and are located at the upper part of the short shoulder beam main beam (71); and a pair of the lower ear plates (73) are provided and are located at the lower part of the short shoulder beam main beam (71).

5. A hoisting structure suitable for a single diaphragm steel box girder as claimed in claim 4, characterized in that: The short shoulder beam (7) further comprises an upper ear plate stiffening plate and a lower ear plate stiffening rib, wherein the upper ear plate stiffening plate is connected between the upper ear plate (72) and the short shoulder beam main beam (71), and the lower ear plate stiffening rib is connected between the lower ear plate (73) and the short shoulder beam main beam (71).

6. A hoisting structure suitable for a single diaphragm steel box girder as claimed in claim 4, characterized in that: The steel box girder hanger is also connected to a hanger main ear plate (2), and the hanger main ear plate (2) is connected to the steel box girder hanger through a hanger main pin shaft (6). The spacing between the hanger main ear plates (2) should be greater than the spacing between the upper ear plates (72) of the short shoulder beam (7).

7. A hoisting structure suitable for a single diaphragm steel box girder as claimed in claim 4, characterized in that: The spacing between the temporary hanging points (8) of the steel beam is equal to the spacing between the lower ear plates (73) of the short shoulder beam (7).

8. The hoisting structure applicable to a single diaphragm steel box girder according to claim 1, characterized in that: The small stiffening plate (9) comprises a longitudinal stiffening plate (91), a transverse stiffening plate (92) and a bottom stiffening plate (93); the longitudinal stiffening plate (91) is arranged on the inner wall of the top plate before and after the transverse diaphragm of the single diaphragm steel box girder (12); the transverse stiffening plate (92) is arranged under the longitudinal stiffening plate (91); and the bottom stiffening plate (93) is arranged on both sides of the connection between the longitudinal stiffening plate (91) and the top plate.

9. A hoisting structure suitable for a single diaphragm steel box girder as claimed in claim 8, characterized in that: The pulling corbel (10) comprises a pulling corbel ear plate (101) and a pulling corbel stiffening plate (102); the pulling corbel ear plate (101) is arranged on a single-diaphragm steel box girder (12) and is in the same longitudinal plane as the longitudinal stiffening plate (91); the pulling corbel stiffening plate (102) is located on both sides of the pulling corbel ear plate (101) and is in the same longitudinal plane as the bottom stiffening plate (93).

10. A hoisting structure suitable for a single diaphragm steel box girder as claimed in claim 8, characterized in that: The small stiffening plate (9), the temporary steel beam suspension point (8) and the pulling bracket (10) are welded and connected to the single diaphragm steel box beam (12) by means of arc welding or submerged arc welding.

Images