A prefabricated hoisting steel bar frame

Abstract

The present invention provides a prefabricated lifting steel bar frame, which belongs to the technical field of railway construction. It includes a chassis bracket, a top plate hanger, and a hanger for connecting the top plate hanger and the chassis bracket up and down into a whole: the chassis bracket includes a frame body I composed of longitudinal beams and transverse beams, an inner mold support beam parallel to the longitudinal beams of the frame body I, an outer mold support beam located outside the transverse outer frame, oblique supports distributed in the frame body I, and a lifting point I and a running pulley located at the overlap of the longitudinal and transverse beams; the top plate hanger includes a frame body II composed of longitudinal beams and transverse beams, oblique supports distributed in the frame body II, and a lifting point II located at the overlap of the longitudinal and transverse beams corresponding to the lifting point I, and a lifting lug is also provided on the transverse beam. The prefabricated lifting steel bar frame of the present invention can directly lift the prefabricated steel bar frame to the working pit for one-time pouring of concrete, which increases safety, saves construction period, and effectively reduces construction costs.

Description

Technical Field

[0001] The invention belongs to the technical field of railway construction, and in particular relates to a prefabricated hoisting steel bar frame. Background Art

[0002] In modern railway construction, frame bridges are usually constructed using open excavation foundations, full-height brackets are set up on site, steel bars are tied, and concrete is poured, or prefabricated boxes, jacking construction methods, and steel reinforcement formwork methods are used. However, the above methods are subject to site restrictions, great impact on the construction environment, long construction periods, long speed limit times, difficulty in organizing equipment and materials, high driving safety risks, and are not suitable for complex terrain conditions. Summary of the invention

[0003] The purpose of the present invention is to provide a prefabricated hoisting steel frame, which adopts a translation construction method to hoist the prefabricated steel frame to a working pit for one-time concrete pouring, thereby reducing construction safety risks, reducing construction costs, and saving construction time. The purpose of the present invention is achieved through the following technical solutions:

[0004] A prefabricated lifting steel bar frame includes a chassis bracket, a top plate hanger, and a hanger rod for connecting the top plate hanger and the chassis bracket up and down into a whole:

[0005] The chassis bracket includes a frame body I composed of longitudinal beams and transverse beams, an inner mold support beam parallel to the longitudinal beams of the frame body I, an outer mold support beam outside the transverse outer frame, an oblique support I distributed in the frame body I, and a hanging point I and a running pulley located at the overlap of the longitudinal and transverse beams;

[0006] The top plate hanger includes a frame body II composed of longitudinal beams and transverse beams, an inclined support II distributed in the frame body II, and a hanging point II located at the overlap of the longitudinal and transverse beams corresponding to the hanging point I, and a lifting lug is also arranged on the transverse beam.

[0007] As a specific embodiment of the prefabricated hoisting steel bar frame described in the present invention, the longitudinal beams and transverse beams of the frame body I and the frame body II are welded by groove butt welding, and the interface positions are fully welded.

[0008] As a specific embodiment of the prefabricated hoisting steel bar frame described in the present invention, reinforcing steel plates are arranged on the upper and lower surfaces of the frame body I and the frame body II. When the reinforcing steel plates are located at the lifting point I or the lifting point II, a lifting rod gap needs to be reserved on the reinforcing steel plates.

[0009] As a specific embodiment of the prefabricated hoisting steel bar frame described in the present invention, when the reinforcing steel plate is located at the lifting point I, the notch of the hanging rod is a circular hole; when the reinforcing steel plate is located at the lifting point II, the notch of the hanging rod is a square.

[0010] As a specific embodiment of the prefabricated hoisting steel bar frame described in the present invention, the longitudinal beams and transverse beams of the frame main body I and the frame main body II are made of I-beams; the inner mold support beam is made of double-jointed welded ∠140mm angle steel; the outer mold support beam is made of I-beams; the inclined support I and the inclined support II are made of ∠140mm angle steel; the hanger is made of PSB830 material Φ32 fine-rolled threaded steel.

[0011] As a specific embodiment of the prefabricated hoisting steel bar frame described in the present invention, the longitudinal beams and transverse beams of the frame body I are made of I16 I-beams; the longitudinal beams and transverse beams of the frame body II are made of I20 I-beams; and the outer formwork support beams are made of I16 I-beams.

[0012] As a specific embodiment of the prefabricated hoisting steel bar frame described in the present invention, the inclined support I is located on the diagonal of the square frame formed by the cross beam and longitudinal beam or inner mold support beam of the frame body I, and forms a diamond truss structure.

[0013] As a specific embodiment of the prefabricated lifting steel bar frame described in the present invention, there are eight lifting points I and eight lifting points II. The corresponding eight lifting points I and II are aligned and connected through the lifting rod, so that the top plate hanger and the bottom plate bracket are connected up and down into a whole.

[0014] As a specific embodiment of the prefabricated lifting steel bar frame of the present invention, it includes a chassis bracket, a top plate hanger, and a hanger rod for connecting the top plate hanger and the chassis bracket into a whole:

[0015] The chassis bracket includes a frame body I composed of five horizontal beams and seven longitudinal beams, the horizontal and longitudinal beams are both made of I-beams, the longitudinal beams of the running pulley and the suspension point I are made of four groups of double-jointed I-beams, and the remaining longitudinal beams are made of single I-beams, and double-jointed angle steels are arranged on the inner sides of the first longitudinal beam and the seventh longitudinal beam at both ends as inner mold support beams, and double-jointed I-beams are arranged on the horizontal outer frame as outer mold support beams, and the remaining horizontal beams are welded with single I-beams and longitudinal I-beams to form an integral chassis bracket frame, and angle steels are arranged in the middle as diagonal supports I;

[0016] In the above chassis bracket, the suspension point I is located at the overlap of the second and fourth cross beams and the double I-beam longitudinal beam, a total of eight; the running pulley is located at the overlap of the first, third and fifth cross beams and the double I-beam longitudinal beam;

[0017] The top plate hanger comprises a frame body II composed of three horizontal beams and four longitudinal beams, both the horizontal and longitudinal beams are made of double-jointed I-beams, eight hanging points II arranged at the joints of the upper and lower horizontal beams and the longitudinal beams are aligned with the corresponding hanging points I on the chassis bracket, four hanging ears are arranged on the horizontal beam, and an inclined support II is arranged in the middle;

[0018] There are eight suspension rods, which are used to connect suspension point I and suspension point II, so that the top plate hanger and the bottom plate bracket are connected up and down into a whole, forming a prefabricated lifting steel bar frame.

[0019] As a specific embodiment of the prefabricated lifting steel bar frame described in the present invention, the lifting ears are located on the upper and lower beams and are distributed at the intersections of the upper and lower beams and the inclined support II.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] Traditional construction adopts open excavation foundation, sets up full-floor bracket on site, ties steel bars and then pours concrete. In terms of process, the bottom plate steel bars are first tied on site - the bottom plate concrete is poured - the full-floor bracket is set up - the wall body and top plate steel bars are tied - the wall body and top plate concrete are poured. The prefabricated hoisting steel bar frame of the present invention saves the previous four construction processes, and the prefabricated steel bar frame can be directly hoisted to the working pit for one-time concrete pouring, which increases safety and saves construction time.

[0022] Especially in the construction of existing lines, the prefabricated hoisting steel bar frame of the present invention can greatly reduce the driving safety and personal safety risks of existing lines. The implementation results have proved that the scheme has been widely praised by owners and the industry, greatly shortening the construction period of traditional processes, reducing construction costs, and reducing safety risks. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic structural diagram of the chassis bracket of Example 1.

[0024] Figure 2 This is a schematic diagram of the structure of the top plate hanger of Example 1.

[0025] Figure 3 This is a schematic diagram of the overall structure of the prefabricated hoisting steel bar frame of Example 1.

[0026] Figure numerals: 1-chassis bracket, 11-frame body I, 111-longitudinal beam, 112-cross beam, 12-inner mold support beam, 13-outer mold support beam, 14-oblique support I, 2-top plate hanger, 21-frame body II, 211-longitudinal beam, 212-cross beam, 22-lifting ear, 23-oblique support II, 3-hanging rod, 4-reinforcement steel plate, 41-hanging rod gap. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0028] A prefabricated lifting steel bar frame includes a chassis bracket, a top plate hanger, and a hanger rod for connecting the top plate hanger and the chassis bracket up and down into a whole:

[0029] The chassis bracket includes a frame body I composed of longitudinal beams and transverse beams, an inner mold support beam parallel to the longitudinal beams of the frame body I, an outer mold support beam located outside the transverse outer frame, an inclined support I distributed in the frame body I, and a hanging point I and a running pulley located at the overlap of the longitudinal and transverse beams.

[0030] In the chassis bracket, the frame body I constitutes the main structure of the chassis bracket, the inner mold support beam and the outer mold support beam support the frame body I to improve the stability of the entire chassis bracket, the inclined support I is used to support the cross beams and longitudinal beams inside the frame body I to further improve the stability inside the frame body I, the hanging point I is used to connect with the hanging rod to realize the connection between the chassis bracket and the top plate hanger, and the running pulley is used to realize the movement of the entire chassis bracket.

[0031] The top plate hanger includes a frame body II composed of longitudinal beams and transverse beams, an inclined support II distributed in the frame body II, and a hanging point II located at the overlap of the longitudinal and transverse beams corresponding to the hanging point I, and a lifting lug is also arranged on the transverse beam.

[0032] In the top plate hanger, the frame body II constitutes the main structure of the chassis bracket, the inclined support II is used to support the cross beams and longitudinal beams inside the frame body II, and further improve the stability inside the frame body II, the lifting point II is used to connect with the hanging rod to realize the connection between the top plate hanger and the chassis bracket, and the lifting lug is used to lift the top plate hanger, thereby realizing the lifting of the top plate hanger or the entire prefabricated lifting steel frame. The distribution of the lifting lug can be set as needed, as long as the smooth lifting of the top plate hanger can be achieved.

[0033] The present invention provides a chassis bracket and a top plate hanger made of steel sections, wherein the entire steel frame structure is connected up and down to form an integral component via a connecting hanger rod in the middle, which facilitates the overall lifting of the steel frame and simultaneously enhances the stability during the lifting process to prevent deformation during the lifting.

[0034] Furthermore, the longitudinal beams and transverse beams of the frame body I and the frame body II are welded by groove butt welding, and the interface positions are fully welded.

[0035] Furthermore, the upper and lower surfaces of the frame body I and the frame body II are provided with reinforcing steel plates. When the reinforcing steel plates are located at the suspension point I or the suspension point II, a suspension rod gap needs to be reserved on the reinforcing steel plates. The reinforcing steel plates are used to further reinforce the transverse and longitudinal beams, thereby improving the stability of the entire frame body I and the frame body II. The number and size of the reinforcing steel plates can be optimized according to needs and the material of the frame body I and the frame body II, as long as they can meet the function of reinforcing and enhancing stability.

[0036] Furthermore, when the reinforcement steel plate is located at the suspension point I, the notch of the suspension rod is in the shape of a circular hole; when the reinforcement steel plate is located at the suspension point II, the notch of the suspension rod is in the shape of a square. The circular hole shape is to correspond to the shape of the suspension rod. The notch of the suspension rod is preferably in the shape of a square at the suspension point II because the suspension rod is first installed in alignment with the suspension point I on the chassis bracket. When installing the top plate hanger, it is difficult to align the suspension rod with the suspension hole II. The square opening is more conducive to the alignment of the suspension rod with the suspension hole II than the circular hole shape, thereby realizing the installation of the suspension rod and the suspension point II.

[0037] Furthermore, the longitudinal beams and transverse beams of the frame body I and the frame body II are made of I-beams; the inner mold support beam is made of ∠140mm angle steel; the outer mold support beam is made of I-beams; the oblique support I and oblique support II are made of ∠140mm angle steel; the suspension rod is made of PSB830 material Φ32 finely rolled threaded steel. Furthermore, the frame body I is made of I16 I-beams; the frame body II is made of I20 I-beams; and the outer mold support beam is made of I16 I-beams.

[0038] Regarding the specific materials of the longitudinal beams and transverse beams of the frame body and frame body II, the inner mold support beams, the outer mold support beams, the diagonal supports I and II, and the hangers, the inventors have conducted various screening and optimizations. Combined with the results of three-dimensional modeling and finite element software analysis, when the longitudinal beams and transverse beams of the frame body I are made of I16 I-beams, the longitudinal beams and transverse beams of the frame body II are made of I20 I-beams, and the hangers are made of PSB830 material Φ32 fine-rolled threaded steel, the needs of construction and cost can be taken into account, and the quality of the prefabricated hoisting steel bar frame can meet the use requirements.

[0039] Furthermore, the oblique support I is located on the diagonal line of the square frame formed by the cross beam and the longitudinal beam or the inner mold support beam of the frame body I, and forms a diamond truss structure.

[0040] Furthermore, there are eight hanging points I and eight hanging points II, and the corresponding eight hanging points I and II are aligned and connected through the hanging rod, so that the top plate hanger and the bottom plate bracket are connected up and down into a whole.

[0041] Example 1

[0042] This embodiment prefabricates the hoisting steel bar frame, such as Figure 1 As shown, it includes a chassis bracket, a top plate hanger, and a hanger rod used to connect the top plate hanger and the chassis bracket up and down into a whole:

[0043] The chassis bracket 1 comprises a frame body Ⅰ11 (9740 mm in transverse width and 8000 mm in longitudinal length) composed of five transverse beams 112 and seven longitudinal beams 111. The longitudinal and transverse beams are both made of I-beams. The longitudinal beams of the running pulley (not shown) and the suspension point Ⅰ (not shown) are made of four groups of double-jointed I-beams. The remaining longitudinal beams 111 are made of single I-beams. Double-jointed angle steels are arranged at both ends on the inner side of the first longitudinal beam and the seventh longitudinal beam as inner mold support beams 12 (1070 mm from the end). Double-jointed I-beams are arranged on the transverse outer frame as outer mold support beams 13. The remaining transverse beams 112 are welded with single I-beams and longitudinal I-beams to form an integral chassis bracket 1 frame. An angle steel is arranged in the middle as an oblique support Ⅰ14.

[0044] In the above-mentioned chassis bracket 1, the hanging point I (not shown) is located at the overlap of the second and fourth cross beams 112 and the double I-beam longitudinal beams 111, specifically between a group of double I-beam longitudinal beams 111, which are eight in total; the running pulley is located at the overlap of the first, third and fifth cross beams 112 and the double I-beam longitudinal beams 111, specifically between a group of double I-beam longitudinal beams 111.

[0045] The top plate hanger 2 includes a frame body II21 (9200mm in transverse width and 4420mm in longitudinal length) composed of three transverse beams 212 and four longitudinal beams 211. Both the transverse and longitudinal beams are made of double-jointed I-beams. Eight hanging points II (not shown) arranged at the overlaps of the upper and lower transverse beams 212 and the longitudinal beams 211 are aligned with the corresponding hanging points I (not shown) on the chassis bracket. Four hanging ears 22 are arranged on the transverse beam, and an inclined support II23 is arranged in the middle.

[0046] There are eight suspension rods 3, and the suspension point I and the suspension point II are connected by the suspension rods 3, so that the top plate hanger 2 and the bottom plate bracket 1 are connected up and down into a whole, forming a prefabricated suspension steel bar frame.

[0047] The lifting lugs 2 are located on the upper and lower cross beams 212 and are distributed at the intersections of the upper and lower cross beams 212 and the oblique supports II 23 .

[0048] The upper and lower parts of the longitudinal beams and transverse beams of the frame body Ⅰ11 and the frame body Ⅱ21 are both provided with reinforcing steel plates 4. When the reinforcing steel plate 4 is located at the hanging point Ⅰ (not shown), a circular hole-shaped hanging rod notch 41 is provided on the reinforcing steel plate 4; when the reinforcing steel plate 4 is located at the hanging point Ⅱ (not shown), a square hanging rod notch 41 is provided on the reinforcing steel plate 4.

[0049] In this embodiment, the longitudinal beam 111 and the transverse beam 112 of the frame body Ⅰ11 are both made of I16 I-beams, the longitudinal beam 211 and the transverse beam 212 of the frame body Ⅱ21 are both made of I20 I-beams, the inner mold support beam 12 is made of ∠140mm angle steel, the outer mold support beam 13 is made of I16 I-beams, the diagonal support Ⅰ14 is made of ∠140mm angle steel, the diagonal support Ⅱ23 is made of ∠140mm angle steel, and the lifting ear 22 is made of 30mm thick steel plate.

[0050] When the prefabricated steel bar frame of this embodiment is used, it is only necessary to prepare the bottom plate bracket 1 and the top plate bracket 2 respectively according to the technical scheme described in this embodiment, and then Figure 3 The schematic diagram shows that the suspension rod 3 is connected to the suspension point I (not shown) on the chassis bracket 1 through the suspension rod notch 41 on the reinforcement steel plate 4, and then the suspension rod 3 is connected to the corresponding suspension point II (not shown) on the top plate hanger 2 through the suspension rod notch 41 on the reinforcement steel plate 4, so that the top plate hanger 2 and the chassis bracket 1 are connected up and down into a whole, forming a prefabricated lifting steel frame.

[0051] Application example of prefabricated hoisting steel bar frame in this embodiment:

[0052] The construction of the left and right moving lines of the Guiyang North Railway Operation Depot expansion project underpasses the existing Guikai Line frame bridge using the prefabricated hoisting steel frame translation construction process of the present invention, and the construction task was successfully completed. Compared with other existing processes, the present invention uses the prefabricated hoisting steel frame for translation construction to achieve great economic and social benefits:

[0053] 1. Construction period benefits

[0054] According to the arrangement of the construction team, the original design plan was used to plan the construction period of 254 days, and the steel frame prefabrication, hoisting and translation construction plan was used to plan 55 days. Finally, the construction was completed in 40 days, which greatly saved the construction period.

[0055] 2. Quality and efficiency

[0056] The construction quality can be controlled by following the steel frame prefabrication, lifting and translation process, and the concrete is poured continuously at one time in the later stage, thus avoiding the problem of construction joints in the traditional construction process.

[0057] 3. Economic benefits

[0058] The traditional construction process is for Level III construction of existing lines, and the construction time is about 6 times that of the prefabricated steel frame hoisting and translation process. The long-term investment in construction and the maintenance of the existing line require a lot of manpower, material and financial resources. This construction process only requires construction manpower, material and financial resources in a short time; this construction process can restore the existing line in a short time, and can meet the requirements for the opening of the new line in a short time. From the cost calculation analysis, the use of prefabricated steel frame hoisting and translation construction method saves about 5.88 million yuan compared with the traditional process.

[0059] During the plan review, the railway bureau discussed the use of a prefabricated steel frame hoisting and translation construction plan. The plan had a construction period of 55 days, requiring the suspension of 22 pairs of EMUs every day, affecting passenger revenue by approximately 120 million yuan. The actual construction period was 40 days, saving 15 days compared to the construction period approved by the railway bureau, and reducing the impact on passenger revenue by approximately 32.25 million yuan.

[0060] 4. Social benefits

[0061] The construction of the moving line frame bridge of the Guiyang North EMU Operation Depot expansion project underpassed the existing Guiyang-Kaifeng passenger dedicated line. The construction of the existing Guiyang-Kaifeng line was blocked on November 2, 2017, and the construction was completed and the blockade of the Guiyang-Kaifeng line was lifted on December 11, 2017. The frame bridge is the controlling project of the entire Guiyang North EMU Operation Depot expansion project. Its early completion is related to the opening time of the entire Guiyang North EMU Operation Depot expansion project.

[0062] The construction of the frame bridge under the existing passenger dedicated line uses off-site prefabricated steel frames and assembled internal and external formwork systems, which are then lifted in sections to the foundation pit by a large truck crane. The prefabricated steel frames are longitudinally moved using the running tracks in the working pit to pass under the existing passenger dedicated line, and then the overall continuous pouring of concrete is completed. The construction was completed in 40 days instead of the planned 55 days.

[0063] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A prefabricated hoisting steel bar frame, characterized in that: It includes a chassis bracket, a top plate hanger, and a hanger rod for connecting the top plate hanger and the chassis bracket up and down into a whole: the chassis bracket includes a frame body I composed of longitudinal beams and transverse beams, an inner mold support beam parallel to the longitudinal beams of the frame body I, an outer mold support beam outside the transverse outer frame, an oblique support I distributed in the frame body I, and a hanging point I and a running pulley located at the overlap of the longitudinal and transverse beams; The top plate hanger comprises a frame body II composed of longitudinal beams and transverse beams, an inclined support II distributed in the frame body II, and a hanging point II located at the overlap of the longitudinal and transverse beams corresponding to the hanging point I, and a hanging lug is also provided on the transverse beam; The longitudinal beams and cross beams of the frame body I and the frame body II are welded by groove butt welding, and the interface positions are fully welded; Reinforcement steel plates are arranged on the upper and lower sides of the frame body I and the frame body II. When the reinforcement steel plates are located at the hanging point I or the hanging point II, a hanger rod gap needs to be reserved on the reinforcement steel plates.

2. A prefabricated hoisting steel bar frame as claimed in claim 1, characterized in that: When the reinforcement steel plate is located at the hanging point I, the notch of the hanger rod is in the shape of a circular hole; when the reinforcement steel plate is located at the hanging point II, the notch of the hanger rod is in the shape of a square.

3. A prefabricated hoisting steel bar frame as claimed in claim 1, characterized in that: The longitudinal beams and transverse beams of the frame body I and the frame body II are made of I-beams; the inner mold support beam is made of double-jointed welded ∠140mm angle steel; the outer mold support beam is made of I-beams; the inclined support I and the inclined support II are made of ∠140mm angle steel; the hanger is made of PSB830 material Φ32 fine-rolled threaded steel.

4. A prefabricated hoisting steel bar frame as claimed in claim 3, characterized in that: The longitudinal beams and transverse beams of the frame body I are made of I16 I-beams; the longitudinal beams and transverse beams of the frame body II are made of I20 I-beams; and the outer mold support beam is made of I16 I-beams.

5. A prefabricated hoisting steel bar frame as claimed in claim 1, characterized in that: The oblique support I is located on the diagonal line of the square frame formed by the cross beam and the longitudinal beam or the inner mold support beam of the frame body I, and forms a diamond truss structure.

6. A prefabricated hoisting steel bar frame as claimed in claim 1, characterized in that: There are eight hanging points I and eight hanging points II, and the corresponding eight hanging points I and II are aligned and connected through the hanging rod, so that the top plate hanger and the bottom plate bracket are connected up and down into a whole.

7. A prefabricated hoisting steel bar frame as claimed in claim 1, characterized in that: It includes a chassis bracket, a top plate hanger, and a hanger rod for connecting the top plate hanger and the chassis bracket up and down into a whole: the chassis bracket includes a frame body I composed of five horizontal beams and seven longitudinal beams, the longitudinal and horizontal beams are both made of I-beams, the longitudinal beams of the running pulley and the hanging point I are made of four groups of double-jointed I-beams, and the remaining longitudinal beams are made of single I-beams, and double-jointed angle steels are arranged at both ends on the inner side of the first longitudinal beam and the seventh longitudinal beam as inner mold support beams, and the horizontal outer frame is provided with double-jointed I-beams as outer mold support beams, and the remaining horizontal beams are welded with single I-beams and longitudinal I-beams to form an integral chassis bracket frame, and angle steels are arranged in the middle as diagonal support I; In the above chassis bracket, the suspension point I is located at the overlap of the second and fourth cross beams and the double I-beam longitudinal beam, a total of eight; the running pulley is located at the overlap of the first, third and fifth cross beams and the double I-beam longitudinal beam; The top plate hanger comprises a frame body II composed of three horizontal beams and four longitudinal beams, both the horizontal and longitudinal beams are made of double-jointed I-beams, eight hanging points II arranged at the joints of the upper and lower horizontal beams and the longitudinal beams are aligned with the corresponding hanging points I on the chassis bracket, four hanging ears are arranged on the horizontal beam, and an inclined support II is arranged in the middle; There are eight suspension rods, which are used to connect suspension point I and suspension point II, so that the top plate hanger and the bottom plate bracket are connected up and down into a whole, forming a prefabricated lifting steel bar frame.

8. A prefabricated hoisting steel bar frame as claimed in claim 1, characterized in that: The lifting ears are located on the upper and lower cross beams and are distributed at the intersections of the upper and lower cross beams and the oblique support II.

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