A combined reinforced concrete structure

Abstract

This invention relates to the field of reinforced concrete structure technology and discloses a composite reinforced concrete structure. The method involves first casting a platform at the installation location, then hoisting the lower column onto the platform and securing it with anchor bolts, followed by hoisting the upper column onto the lower column and securing it with bolts, and finally hoisting the beam onto the upper column. Before the beam and upper column are fully aligned, the alignment groove is aligned with the alignment insert. When the beam moves onto the upper column, the alignment groove and alignment insert first come into contact, allowing the alignment insert to slide into the groove under its constraint. The mutual constraint between the alignment insert and the alignment groove completes the full alignment of the beam and upper column, ensuring the beam remains fully aligned when it lands on the upper column. This reduces the difficulty of rebar connection during the assembly of beams and columns in the reinforced concrete structure, improves hoisting stability, and effectively eliminates the swaying effect caused by wind in windy conditions, preventing collision damage.

Description

Technical Field

[0001] This invention relates to the field of reinforced concrete structure technology, specifically a composite reinforced concrete structure. Background Technology

[0002] Reinforced concrete structures are structures made of concrete reinforced with steel bars. They have advantages such as durability, good fire resistance, good integrity, and the ability to use locally sourced materials, making them very suitable for urban construction.

[0003] Currently, precast reinforced concrete structural components are widely used in construction. Most of these reinforced concrete structures are designed as composite structural components to meet the construction needs of industrialized prefabricated public and residential buildings and to meet national energy-saving standards.

[0004] However, the following problems still exist: When beams and columns in reinforced concrete structures are combined, they are often affected by the dense steel bars on the reinforced concrete columns, making it difficult to connect them. This requires a high degree of stability in hoisting. When the construction site is in a windy environment, it will have a greater impact on the connection, and it is easy to cause shaking and collision damage. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a composite reinforced concrete structure that reduces the difficulty of connecting steel bars when assembling beams and columns in reinforced concrete structures. This improves the stability of hoisting and effectively eliminates the swaying effect caused by wind in windy environments, avoiding collision damage caused by swaying. It solves the problem that when assembling beams and columns in reinforced concrete structures, the dense steel bars on the reinforced concrete columns often make connection difficult, requiring high hoisting stability. In windy environments at construction sites, this further exacerbates the problem of swaying and collision damage.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a combined reinforced concrete structure, including a pedestal, a reinforced concrete mechanism disposed on the pedestal, and an auxiliary mechanism disposed on the reinforced concrete mechanism. The reinforced concrete mechanism includes a lower column, an upper column, and a beam. The lower column is disposed on the pedestal, the upper column is disposed at the top of the lower column, and the beam is disposed at the top of the upper column. The auxiliary mechanism includes an alignment plug and an alignment groove. The alignment plug is provided at the top of the upper column and the alignment groove is provided at the bottom of the beam. When the upper column and the beam are combined, the alignment plug and the alignment groove first come into contact, so that the alignment plug is restricted by the alignment groove, so that the alignment plug slides into the alignment groove.

[0007] Preferably, the reinforced concrete structure further includes an upper steel plate, the lower column is fixedly connected to the pedestal using anchor bolts, the upper steel plate is fixedly installed at the top of the lower column, the cross-sectional dimension of the upper steel plate is larger than the cross-sectional dimension of the lower column, and the upper steel plate is sleeved on the lower column.

[0008] Preferably, a lower steel plate is provided at the bottom of the upper column, the cross-sectional dimension of the lower steel plate is larger than the cross-sectional dimension of the upper column, the lower steel plate is sleeved on the upper column, the size of the lower steel plate is the same as the size of the upper steel plate, the lower steel plate is located directly above the upper steel plate, and the lower steel plate is bolted to the upper steel plate.

[0009] Preferably, the upper column is provided with a plurality of steel bars, all of which protrude from the top of the upper column. The portion of the steel bars above the upper column is the exposed end after the upper column is cast. The steel bars are evenly distributed on the upper column, and the beam is located above the upper column.

[0010] Preferably, the lower column and the upper column are symmetrically arranged at both ends of the beam, so that the supporting column structure formed by the lower column and the upper column supports the beam. Multiple steel bar holes are opened on the bottom side of both ends of the beam. The steel bar holes are evenly distributed on the bottom side of both ends of the beam. The number of steel bar holes at each end is the same as the number of steel bars on a single upper column. The distribution position of the steel bars corresponds to the distribution position of the steel bar holes. The thickness of the steel bars is adapted to the cross-sectional size of the steel bar holes.

[0011] Preferably, the beam and the upper column are fixedly connected by bolts, or the reinforcing bar hole penetrates the beam, and after the reinforcing bar enters the reinforcing bar hole, concrete is poured into the reinforcing bar hole to fix the beam and the upper column.

[0012] Preferably, the auxiliary mechanism further includes placement slots, each corner of the top of the upper column is provided with a placement slot, the placement slot is a cylindrical slot, and the alignment plug is inserted into each placement slot. The alignment plug extends through the placement slot, the lower part of the alignment plug is a cylindrical structure, the lower part of the alignment plug is adapted to the placement slot, the upper part of the alignment plug extends to the top of the upper column, the part of the alignment plug outside the placement slot is the upper part of the alignment plug, the upper part of the alignment plug is a platform structure, and the length of the upper part of the alignment plug is greater than the length of the exposed end of the reinforcing bar.

[0013] Preferably, multiple alignment grooves are provided on the bottom sides of both ends of the beam. The number of alignment grooves at each end is the same as the number of alignment plugs on a single upper column. The alignment grooves and alignment plugs are vertically opposite each other. The shape of the alignment grooves is adapted to the upper part shape of the alignment plugs. Sliding openings are provided on both sides of the bottom end of the alignment grooves so that when the alignment plugs enter the alignment grooves, the alignment plugs move into the alignment grooves along the sliding openings of the alignment grooves.

[0014] Preferably, multiple side openings are provided at both ends of the beam, and the side openings at each end are symmetrically distributed on both sides of the beam. An extension frame is inserted into each side opening. The bottom end of the extension frame that is fully inserted into the side opening is adjacent to the upper column. A rubber wheel is rotatably fitted to the bottom end of each extension frame, and the rubber wheel is in contact with the upper column.

[0015] Preferably, balance control ribs are fixedly provided on the top sides of both ends of the beam. The balance control ribs cannot bear the force to lift the beam. When the crane lifts the main body of the beam, auxiliary slings are connected to the balance control ribs to control the horizontal state of the beam.

[0016] Compared with the prior art, the present invention provides a composite reinforced concrete structure with the following advantages: 1. This composite reinforced concrete structure involves first casting a platform at the installation location, then hoisting the lower column onto the platform and securing it with anchor bolts, followed by hoisting the upper column onto the lower column and securing it with bolts, and finally hoisting the beam onto the upper column. Before the beam and upper column are fully aligned, the alignment grooves are aligned with the alignment inserts. When the beam moves onto the upper column, the alignment grooves and alignment inserts first come into contact, allowing the alignment inserts to be restricted by the alignment grooves and slide into them. The mutual restriction between the alignment inserts and the alignment grooves completes the full alignment of the beam and upper column, ensuring that the beam remains fully aligned when it lands on the upper column. This reduces the difficulty of connecting reinforcing bars during the assembly of beams and columns in the reinforced concrete structure, improves the stability of hoisting, and effectively eliminates the swaying effect caused by wind in windy environments, avoiding collision damage caused by swaying.

[0017] 2. This composite reinforced concrete structure, through the installation of rubber wheels, controls the stability of the beam during its descent by rolling the rubber wheels on the upper column as the beam falls onto it. This prevents the beam from swaying in windy conditions, improves the stability of construction in windy environments, and enhances the applicability of the composite reinforced concrete structure. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structural distribution at the alignment groove of the present invention; Figure 2This is a schematic diagram of the reinforced concrete structure of the present invention; Figure 3 This is a schematic diagram of the structural distribution at the reinforcing steel bars in this invention; Figure 4 This is a schematic diagram of the structural distribution at the rebar holes of the present invention; Figure 5 This is a schematic diagram of the auxiliary mechanism structure of the present invention; Figure 6 This is a schematic diagram of the structural distribution at the rubber wheel of the present invention.

[0019] In the diagram: 1. Platform; 2. Reinforced concrete structure; 21. Lower column; 22. Upper steel plate; 23. Upper column; 24. Lower steel plate; 25. Reinforcing bar; 26. Beam; 27. Reinforcing bar hole; 3. Auxiliary mechanism; 31. Placement slot; 32. Alignment insert; 33. Alignment slot; 34. Side opening; 35. Extension frame; 36. Rubber wheel; 37. Balance control rib. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] As described in the background section, there are shortcomings in the existing technology. In order to solve the above-mentioned technical problems, this application proposes a composite reinforced concrete structure.

[0022] In one typical implementation of this application, such as Figures 1-6 As shown, a composite reinforced concrete structure includes a platform 1, a reinforced concrete mechanism 2 set on the platform 1, and an auxiliary mechanism 3 set on the reinforced concrete mechanism 2. The reinforced concrete mechanism 2 includes a lower column 21, an upper column 23, and a beam 26. The lower column 21 is set on the platform 1, the upper column 23 is set at the top of the lower column 21, and the beam 26 is set at the top of the upper column 23. The auxiliary mechanism 3 includes an alignment plug 32 and an alignment groove 33. The upper column 23 is provided with an alignment plug 32 at its top end, and the beam 26 is provided with an alignment groove 33 at its bottom end. When the upper column 23 and the beam 26 are combined, the alignment plug 32 and the alignment groove 33 first come into contact, so that the alignment plug 32 is restricted by the alignment groove 33, so that the alignment plug 32 slides into the alignment groove 33.

[0023] When using this invention: First, cast the platform 1 at the installation location. Then, hoist the lower column 21 onto the platform 1 and secure it with anchor bolts. Next, hoist the upper column 23 onto the lower column 21 and secure it with bolts. Then, hoist the beam 26 onto the upper column 23. Before the beam 26 and the upper column 23 are fully aligned, align the alignment groove 33 with the alignment insert 32. When the beam 26 moves towards the upper column 23, the alignment groove 33 and the alignment insert 32 will first come into contact, so that the alignment insert 32 is supported by the alignment groove. The beam 26 and the upper column 23 are completely aligned by the mutual restraint of the alignment plug 32 and the alignment groove 33. This ensures that the beam 26 remains fully aligned when it falls onto the upper column 23. As a result, the beam and column in the reinforced concrete structure are combined, which reduces the difficulty of connecting the reinforcing bars, improves the stability of the hoisting, and effectively eliminates the swaying effect caused by wind in windy environments, thus avoiding collision damage caused by swaying and collision.

[0024] Furthermore, the reinforced concrete structure 2 also includes an upper steel plate 22. The lower column 21 is fixedly connected to the base 1 using anchor bolts. The upper steel plate 22 is fixedly installed at the top of the lower column 21. The cross-sectional dimension of the upper steel plate 22 is larger than that of the lower column 21. The upper steel plate 22 is fitted onto the lower column 21.

[0025] Furthermore, a lower steel plate 24 is provided at the bottom of the upper column 23. The cross-sectional dimension of the lower steel plate 24 is larger than that of the upper column 23. The lower steel plate 24 is fitted onto the upper column 23. The dimensions of the lower steel plate 24 are the same as those of the upper steel plate 22. The lower steel plate 24 is located directly above the upper steel plate 22. The lower steel plate 24 and the upper steel plate 22 are bolted together.

[0026] Furthermore, multiple reinforcing bars 25 are provided on the upper column 23, and all the reinforcing bars 25 protrude from the top of the upper column 23. The part of the reinforcing bars 25 above the upper column 23 is the exposed end after the upper column 23 is poured. The reinforcing bars 25 are evenly distributed on the upper column 23, and the beam 26 is located above the upper column 23.

[0027] Furthermore, the lower column 21 and the upper column 23 are symmetrically arranged at both ends of the beam 26, so that the supporting column structure formed by the lower column 21 and the upper column 23 supports the beam 26. Multiple steel bar holes 27 are opened on the bottom side of both ends of the beam 26. The steel bar holes 27 are evenly distributed on the bottom side of both ends of the beam 26. The number of steel bar holes 27 at each end is the same as the number of steel bars 25 on a single upper column 23. The distribution position of the steel bars 25 corresponds to the distribution position of the steel bar holes 27. The thickness of the steel bars 25 is adapted to the cross-sectional size of the steel bar holes 27.

[0028] Furthermore, the beam 26 and the upper column 23 are fixedly connected by bolts, or the steel bar hole 27 penetrates the beam 26. After the steel bar 25 enters the steel bar hole 27, concrete is poured into the steel bar hole 27 to fix the beam 26 and the upper column 23.

[0029] In the specific assembly and installation of the reinforced concrete structure, after the platform 1 is poured, the lower column 21 is first hoisted onto the platform 1, and then the platform 1 and the lower column 21 are fixedly connected using anchor bolts. Then the upper column 23 is hoisted onto the lower column 21, and the upper steel plate 22 and the lower steel plate 24 are aligned at the same time. After the upper column 23 is hoisted onto the lower column 21, the upper steel plate 22 and the lower steel plate 24 are fixedly connected using bolts. Then the beam 26 is hoisted onto the upper column 23. When the beam 26 is hoisted onto the upper column 23, the reinforcing bar 25 and the reinforcing bar hole 27 need to be aligned first. After the alignment is completed, the beam 26 is lowered onto the upper column 23.

[0030] Furthermore, the auxiliary mechanism 3 also includes a placement groove 31. Each corner of the top of the upper column 23 is provided with a placement groove 31. The placement groove 31 is a cylindrical groove. Each placement groove 31 is fitted with an alignment plug 32. The alignment plug 32 passes through the placement groove 31. The lower part of the alignment plug 32 is a cylindrical structure. The lower part of the alignment plug 32 is adapted to the placement groove 31. The upper part of the alignment plug 32 extends to the top of the upper column 23. The part of the alignment plug 32 outside the placement groove 31 is the upper part of the alignment plug 32. The upper part of the alignment plug 32 is a platform structure. The length of the upper part of the alignment plug 32 is greater than the length of the exposed end of the steel bar 25.

[0031] Furthermore, multiple alignment grooves 33 are provided on the bottom sides of both ends of the beam 26. The number of alignment grooves 33 at each end is the same as the number of alignment plugs 32 on a single upper column 23. The alignment grooves 33 and alignment plugs 32 are vertically opposite each other. The shape of the alignment grooves 33 is adapted to the upper part of the alignment plugs 32. Sliding openings are provided on both sides of the bottom end of the alignment grooves 33 so that when the alignment plugs 32 enter the alignment grooves 33, the alignment plugs 32 move into the alignment grooves 33 along the sliding openings of the alignment grooves 33.

[0032] Furthermore, multiple side openings 34 are provided at both ends of the beam 26. The side openings 34 at each end are symmetrically distributed on both sides of the beam 26. An extension frame 35 is inserted into each side opening 34. The bottom end of the extension frame 35 that is fully inserted into the side opening 34 is adjacent to the upper column 23. The bottom end of the extension frame 35 is rotatably fitted with a rubber wheel 36, which is in contact with the upper column 23.

[0033] Furthermore, balance control ribs 37 are fixedly installed on the top sides of both ends of the beam 26. The balance control ribs 37 cannot bear the force to lift the beam. When the crane lifts the main body of the beam 26, auxiliary slings are connected to the balance control ribs 37 to control the horizontal state of the beam 26.

[0034] During the alignment of the reinforcing bar 25 with the reinforcing bar hole 27, the extension frame 35 is first inserted into the side opening 34. At this time, the extension frame 35 is not fully inserted into the side opening 34. As the beam 26 falls, the alignment plug 32 touches the alignment groove 33. Using the constraint of the alignment groove 33, the alignment plug 32 moves into the alignment groove 33. After the alignment plug 32 enters the alignment groove 33, the reinforcing bar 25 and the reinforcing bar hole 27 are automatically aligned. Then, the extension frame 35 is fully inserted into the side opening 34. When the beam 26 falls completely onto the upper column 23, the rubber wheel 36 will roll on the upper column 23. The rubber wheel 36 is used to stabilize the falling of the beam 26 to prevent the beam 26 from swaying in windy conditions. When lifting the beam 26, the auxiliary slings can be used to connect the balance control ribs 37. The balance control ribs 37 at both ends are used to control the horizontal state of the beam 26.

[0035] Working principle of the invention: First, cast the platform 1 at the installation location. Then, hoist the lower column 21 onto the platform 1 and secure it with anchor bolts. Next, hoist the upper column 23 onto the lower column 21 and secure it with bolts. Then, hoist the beam 26 onto the upper column 23. Before the beam 26 and the upper column 23 are fully aligned, align the alignment groove 33 with the alignment insert 32. When the beam 26 moves towards the upper column 23, the alignment groove 33 and the alignment insert 32 will first come into contact, so that the alignment insert 32 is supported by the alignment groove. The beam 26 and the upper column 23 are completely aligned by the mutual restraint of the alignment plug 32 and the alignment groove 33. This ensures that the beam 26 remains fully aligned when it falls onto the upper column 23. As a result, the beam and column in the reinforced concrete structure are combined, which reduces the difficulty of connecting the reinforcing bars, improves the stability of the hoisting, and effectively eliminates the swaying effect caused by wind in windy environments, thus avoiding collision damage caused by swaying and collision. In the specific assembly and installation of the reinforced concrete structure, after the platform 1 is poured, the lower column 21 is first hoisted onto the platform 1, and then the platform 1 and the lower column 21 are fixedly connected using anchor bolts. Then the upper column 23 is hoisted onto the lower column 21, and at the same time the upper steel plate 22 and the lower steel plate 24 are aligned. After the upper column 23 is hoisted onto the lower column 21, the upper steel plate 22 and the lower steel plate 24 are fixedly connected using bolts. Then the beam 26 is hoisted onto the upper column 23. When the beam 26 is hoisted onto the upper column 23, the reinforcing bar 25 and the reinforcing bar hole 27 need to be aligned first. After the alignment is completed, the beam 26 is lowered onto the upper column 23. When aligning the reinforcing bar 25 with the reinforcing bar hole 27, first insert the extension frame 35 into the side opening 34. At this time, the extension frame 35 is not fully inserted into the side opening 34. Then, as the beam 26 falls, the alignment plug 32 touches the alignment groove 33. Using the constraint of the alignment groove 33, the alignment plug 32 moves into the alignment groove 33. At this time, as the alignment plug 32 enters the alignment groove 33, the reinforcing bar 25 and the reinforcing bar hole 27 are automatically aligned. Then, the extension frame 35 is fully inserted into the side opening 34. After the beam 26 falls completely onto the upper column 23, the rubber wheel 36 will roll on the upper column 23. The rubber wheel 36 is used to stabilize the falling of the beam 26, thereby preventing the beam 26 from swaying in windy conditions. When lifting the beam 26, the auxiliary slings can be used to connect the balance control ribs 37. The balance control ribs 37 at both ends are used to control the horizontal state of the beam 26.

[0036] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A composite reinforced concrete structure, comprising a pedestal (1), a reinforced concrete mechanism (2) disposed on the pedestal (1), and an auxiliary mechanism (3) disposed on the reinforced concrete mechanism (2), characterized in that: The reinforced concrete structure (2) includes a lower column (21), an upper column (23), and a beam (26). The lower column (21) is provided on the platform (1), the upper column (23) is provided at the top of the lower column (21), and the beam (26) is provided at the top of the upper column (23). The auxiliary mechanism (3) includes an alignment plug (32) and an alignment groove (33). The alignment plug (32) is provided at the top of the upper column (23), and the alignment groove (33) is provided at the bottom of the beam (26). When the upper column (23) and the beam (26) are combined, the alignment plug (32) and the alignment groove (33) first come into contact, so that the alignment plug (32) is restricted by the alignment groove (33) so that the alignment plug (32) slides into the alignment groove (33).

2. A composite reinforced concrete structure according to claim 1, characterized in that: The reinforced concrete structure (2) also includes an upper steel plate (22). The lower column (21) and the platform (1) are fixedly connected by anchor bolts. The upper steel plate (22) is fixedly installed at the top of the lower column (21). The cross-sectional dimension of the upper steel plate (22) is larger than that of the lower column (21). The upper steel plate (22) is sleeved on the lower column (21).

3. A composite reinforced concrete structure according to claim 2, characterized in that: The bottom end of the upper column (23) is provided with a lower steel plate (24). The cross-sectional dimension of the lower steel plate (24) is larger than that of the upper column (23). The lower steel plate (24) is sleeved on the upper column (23). The size of the lower steel plate (24) is the same as that of the upper steel plate (22). The lower steel plate (24) is located directly above the upper steel plate (22). The lower steel plate (24) is bolted to the upper steel plate (22).

4. A composite reinforced concrete structure according to claim 3, characterized in that: The upper column (23) is provided with multiple reinforcing bars (25), and the multiple reinforcing bars (25) all protrude from the top of the upper column (23). The part of the reinforcing bars (25) above the upper column (23) is the exposed end of the upper column (23) after it is cast. The reinforcing bars (25) are evenly distributed on the upper column (23), and the beam (26) is located above the upper column (23).

5. A composite reinforced concrete structure according to claim 4, characterized in that: The lower column (21) and the upper column (23) are symmetrically arranged at both ends of the beam (26), so that the supporting column structure formed by the lower column (21) and the upper column (23) supports the beam (26). Multiple steel bar holes (27) are opened on the bottom side of both ends of the beam (26). The steel bar holes (27) are evenly distributed on the bottom side of both ends of the beam (26). The number of steel bar holes (27) at each end is the same as the number of steel bars (25) on a single upper column (23). The distribution position of the steel bars (25) corresponds to the distribution position of the steel bar holes (27). The thickness of the steel bars (25) is adapted to the cross-sectional size of the steel bar holes (27).

6. A composite reinforced concrete structure according to claim 5, characterized in that: The beam (26) and the upper column (23) are fixedly connected by bolts, or the steel bar hole (27) penetrates the beam (26). After the steel bar (25) enters the steel bar hole (27), concrete is poured into the steel bar hole (27) to fix the beam (26) and the upper column (23).

7. A composite reinforced concrete structure according to claim 6, characterized in that: The auxiliary mechanism (3) also includes a placement groove (31). The placement groove (31) is provided at the top corner of the upper column (23). The placement groove (31) is a cylindrical groove. The alignment plug (32) is inserted into the placement groove (31). The alignment plug (32) passes through the placement groove (31). The lower part of the alignment plug (32) is a cylindrical structure. The lower part of the alignment plug (32) is adapted to the placement groove (31). The upper part of the alignment plug (32) extends to the top of the upper column (23). The part of the alignment plug (32) outside the placement groove (31) is the upper part of the alignment plug (32). The upper part of the alignment plug (32) is a platform structure. The length of the upper part of the alignment plug (32) is greater than the exposed end length of the steel bar (25).

8. A composite reinforced concrete structure according to claim 7, characterized in that: Multiple alignment grooves (33) are provided on the bottom sides of both ends of the beam (26). The number of alignment grooves (33) at each end is the same as the number of alignment plugs (32) on a single upper column (23). The alignment grooves (33) and the alignment plugs (32) are vertically opposite each other. The shape of the alignment grooves (33) is adapted to the shape of the upper part of the alignment plugs (32). Sliding openings are provided on both sides of the bottom end of the alignment grooves (33) so that when the alignment plugs (32) enter the alignment grooves (33), the alignment plugs (32) move into the alignment grooves (33) along the sliding openings of the alignment grooves (33).

9. A composite reinforced concrete structure according to claim 8, characterized in that: Multiple side openings (34) are provided at both ends of the beam (26). The side openings (34) at each end are symmetrically distributed on both sides of the beam (26). An extension frame (35) is inserted into each side opening (34). The bottom end of the extension frame (35) that is fully inserted into the side opening (34) is adjacent to the upper column (23). The bottom end of the extension frame (35) is rotatably fitted with a rubber wheel (36). The rubber wheel (36) is in contact with the upper column (23).

10. A composite reinforced concrete structure according to claim 9, characterized in that: The beam (26) is fixedly provided with balance control ribs (37) at both ends of the top side. The balance control ribs (37) cannot be lifted by force. When the crane lifts the main body of the beam (26), the balance control ribs (37) are used to send out auxiliary slings to the balance control ribs (37) to control the horizontal state of the beam (26).

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