Middle-span steel beam integral hoisting equipment

Abstract

The utility model provides a midspan steel beam integral hoisting device which comprises a group of second rhombic truss assemblies arranged on the left side of a first rhombic truss assembly on the left side in parallel and a group of second rhombic truss assemblies arranged on the right side of a first rhombic truss assembly on the right side in parallel. The second rhombic truss assembly is connected with the first rhombic truss assemblies through cross braces, at least three groups of parallel braces are arranged between the first rhombic truss assemblies, a front upper cross beam is additionally arranged on the second rhombic truss assembly, and a bearing beam is arranged above the front upper cross beam; the second rhombic truss assembly is additionally arranged to improve the overall stability of the hoisting equipment, the front upper cross beams are additionally arranged on the second rhombic truss assembly, and the bearing beams are arranged on the two front upper cross beams to be used for installing a hoisting machine, so that the strength and rigidity of the equipment are improved, the steel box girder can be overall lifted, the high-altitude operation frequency is reduced, and the safety risk is reduced; the lifting process is more efficient, and the construction period is shortened; the lifting machine can accurately control the lifting strength and speed, and it is ensured that the steel box girder is stably in place.

Description

TECHNICAL FIELD

[0001] The utility model relates to bridge hoisting related technical field, especially a kind of whole hoisting equipment of cross steel beam. BACKGROUND

[0002] Due to the economic and technical advantages of steel-concrete composite beam bridge, most of the newly-built bridges currently adopt steel structure or steel-concrete composite structure. However, during the construction of steel structure and steel-concrete composite structure beam bridge, the construction safety risk is high due to the influence of topography and other factors.

[0003] Generally, for bridge installation, a crane or a bridge erecting machine is used to hoist the segmented beam body (such as cross steel beam) to be installed onto the constructed bridge deck, and then the segmented beam body is connected and fixed by welding, bolt connection and other methods. The segmented processing and installation construction procedure is complicated, the construction time is long, the high-altitude operation and on-site welding risk is high, which greatly affects the construction progress, requires high construction site construction, requires large equipment investment, and has certain limitations in construction. UTILITY MODEL CONTENT

[0004] The utility model aims to provide a whole hoisting equipment of cross steel beam, which has sufficient strength and rigidity, can lift the steel box beam as a whole, thereby reducing the frequency of high-altitude operation, reducing the safety risk, and making the lifting process more efficient and reducing the construction period; can accurately control the hoisting strength and speed to ensure the stable positioning of the steel box beam.

[0005] Therefore, the utility model adopts the technical scheme that a whole hoisting equipment of cross steel beam comprises a steel box beam bridge deck crane arranged on the top surface of a constructed beam segment, the steel box beam bridge deck crane comprises at least three groups of first diamond truss assemblies arranged in parallel, the first diamond truss assemblies are connected through connecting assemblies, a front upper cross beam is arranged at the front upper end of the first diamond truss assembly, a hoisting machine for hoisting the bridge is arranged on the front upper cross beam, a horizontal connecting rod for connecting the first diamond truss assemblies is horizontally arranged below the front upper cross beam, the steel box beam bridge deck crane further comprises a group of second diamond truss assemblies arranged in parallel on the left side of the left first diamond truss assembly and a group of second diamond truss assemblies arranged in parallel on the right side of the right first diamond truss assembly, the second diamond truss assemblies are connected with the adjacent first diamond truss assemblies through cross braces, at least three groups of horizontal links for increasing the overall strength are horizontally added between the first diamond truss assemblies, a front upper cross beam is added to the second diamond truss assembly, the two front upper cross beams are arranged in parallel, and a cushion beam for installing the hoisting machine is arranged above the two front upper cross beams.

[0006] As the above-mentioned scheme is preferred, the second rhombic truss assembly is the same in shape and size as the first rhombic truss assembly, the second rhombic truss assembly and the first rhombic truss assembly each comprise an upper horizontal rod, a lower horizontal rod, a front inclined rod, a rear inclined rod and a vertical rod, the rod members are connected by pin joints with a diameter of 169 mm and made of 45# steel, the upper horizontal rod, the lower horizontal rod, the front inclined rod and the rear inclined rod are connected in a rhombic shape, and the vertical rod is connected at the opposite corners of the rhombic shape.

[0007] Further preferably, the connecting assembly comprises an upper chord rod and a lower chord rod arranged in parallel, the upper chord rod is arranged at the connection between the top end of the vertical rod and the end of the upper horizontal rod, and the lower chord rod is arranged at the middle part of the vertical rod, vertical vertical web members and inclined web members are arranged between the upper chord rod and the lower chord rod, the upper chord rod and the lower chord rod are made of square steel with a size of 220*220*10mm, the vertical web members and the inclined web members are made of square steel with a size of 150*150*6mm, and the material is Q345B, and the connecting assembly is connected with the first rhombic truss assembly by bolts.

[0008] Further preferably, the number of hoisting machines is five, two are arranged in front of and behind the two sides of the front upper cross beam, and one is arranged in the middle, the hoisting machine adopts a 200t hydraulic continuous jack, and the jack adopts 15*7-φs15.2 steel wire rope to hoist the steel box girder.

[0009] Further preferably, the second rhombic truss assembly, the first rhombic truss assembly and the front upper cross beam are provided with passages for connecting the steel box girder with the steel wire.

[0010] Further preferably, the flat links are arranged at the middle part of the upper horizontal rod, the middle part of the lower horizontal rod and the end of the vertical rod.

[0011] Further preferably, the second rhombic truss assembly is provided with cross braces corresponding to the connection between the first rhombic truss assembly, the flat links and the upper chord rod and the lower chord rod of the connecting assembly.

[0012] Further preferably, a connecting rod is arranged between the cross brace arranged at the middle part of the upper horizontal rod and the flat link.

[0013] The utility model discloses the beneficial effect: through the second rhombic truss assembly to improve the overall stability of hoisting equipment, and the front upper cross beam is additionally arranged on the second rhombic truss assembly, and the cushion beam is arranged on the two front upper cross beams for installing hoisting machine, improve the strength and rigidity of equipment, can whole lifting steel box girder, thereby reduce the frequency of high-altitude operation, reduce the security risk, and the lifting process is more efficient, reduces the construction period, hoisting machine can accurately control the hoisting strength and speed, ensure that steel box girder is smoothly positioned. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is the working state schematic diagram of the utility modelFigure 1 .

[0015] Figure 2 This is a schematic diagram of the working state of this utility model. Figure 2 .

[0016] Figure 3 This is a schematic diagram of the structure of this utility model. Detailed Implementation

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0018] like Figures 1-3 As shown, a mid-span steel beam hoisting device includes a steel box girder bridge deck crane installed on the top surface of the constructed beam segment. The steel box girder bridge deck crane includes at least three sets of parallel first rhomboid truss components a1, which are connected by connecting components a2. A front upper crossbeam a3 is provided at the front end of the first rhomboid truss components a1. The front upper crossbeam a3 has a box section with a height of 700mm, a width of 500mm, a top and bottom plate thickness δ = 16mm, a web plate thickness δ = 12mm, and is made of Q345B material.

[0019] Five cranes, a4, are installed on the front upper crossbeam a3 for hoisting the bridge. Two cranes are located on the front and rear sides of the front upper crossbeam a3, and one is located in the middle. The cranes a4 use 200t hydraulic continuous jacks, and the jacks use 15×7-φs15.2 steel strands to hoist the steel box girders. Channels for connecting the steel box girders are opened on the second rhomboid truss assembly a5, the first rhomboid truss assembly a1, and the front upper crossbeam a3.

[0020] A transverse connecting rod is provided below the upper front beam a3 to connect the first rhomboid truss assembly a1. The first rhomboid truss assembly a1 is connected by the transverse connecting rod to ensure the overall strength of the structure. A connecting rod a9 is provided at an interval between the transverse connecting rod and the horizontal bracing a7 located in the middle of the upper horizontal bar a11. The connecting rod a9 between the transverse connecting rod and the horizontal bracing a7 located in the middle of the upper horizontal bar a11 improves the overall stability and strength.

[0021] The steel box girder bridge deck crane also includes a set of second rhomboid truss components a5 arranged parallel to the left side of the first rhomboid truss component a1 on the left, and a set of second rhomboid truss components a5 arranged parallel to the right side of the first rhomboid truss component a1 on the right. The second rhomboid truss components a5 are connected to the adjacent first rhomboid truss components a1 by cross bracing a6. At least three sets of horizontal bracing a7 are added laterally between the first rhomboid truss components a1 to increase the overall strength. The horizontal bracing a7 is respectively located at the middle of the upper horizontal bar a11, the middle of the lower horizontal bar a12, and the end of the vertical bar a15. The two ends of the horizontal bracing a7 are respectively connected to the first rhomboid truss components a1 on the left and right sides. The second rhomboid truss components a5 are provided with cross bracing a6 at the connection points of the first rhomboid truss components a1 and the horizontal bracing a7, as well as the upper chord a16 and lower chord a17 of the connecting component a2.

[0022] An additional front upper crossbeam a3 is added to the second rhomboid truss assembly a5. The two front upper crossbeams a3 are arranged in parallel, and a pad beam a8 for installing the crane a4 is set on top of them. By adding the pad beam a8 for installing the crane a4 and the front upper crossbeam a3, the stress on the crossbeams can be distributed, ensuring the overall stress on the lifting equipment.

[0023] The second rhomboid truss assembly a5 has the same shape and dimensions as the first rhomboid truss assembly a1. Both the second rhomboid truss assembly a5 and the first rhomboid truss assembly a1 include an upper horizontal member a11, a lower horizontal member a12, a front diagonal member a13, a rear diagonal member a14, and a vertical member a15. All members are connected by 169mm diameter 45# steel pins. The upper horizontal member a11, lower horizontal member a12, front diagonal member a13, and rear diagonal member a14 form a rhomboid shape, and the vertical member a15 is connected at the opposite corner of the rhomboid. The members of the second rhomboid truss assembly a5 and the first rhomboid truss assembly a1 are connected by φ169mm pins made of 45# steel. The front end of the lower horizontal member a12 is connected to the top surface of the bridge via a temporary reinforcing plate a10.

[0024] The connecting component a2 includes a parallel upper chord a16 and a lower chord a17. The upper chord a16 is located at the connection between the top of the upright a15 and the end of the upper horizontal bar a11. The lower chord a17 is located in the middle of the upright a15. Vertically arranged vertical web members a18 and inclined web members a19 are spaced apart between the upper chord a16 and the lower chord a17. The upper chord a16 and lower chord a17 are made of 220×220×10mm square steel, and the vertical web members a18 and inclined web members a19 are made of 150×150×6mm square steel, all made of Q345B. The connecting component a2 is bolted to the first rhomboid truss component a1. The connections between the connecting component a2 and the first rhomboid truss component a1, as well as between the cross brace a6 and the second rhomboid truss component a5, are all made using 10.9 grade M24×80 bolts.

[0025] In this embodiment, for the fixed base support of the steel box girder bridge deck crane (the fixed base support is existing technology and will not be described in detail here), due to the addition of the second rhomboid truss assembly a5, some improvements and adjustments have also been made accordingly. The fixed base support includes a base plate and a flange plate. The rear end of the base plate is fixed by a rear anchor. The rear anchor includes an additional rear anchor support, a rear anchor threaded steel bar, and a rear anchor pad plate for fixing the rear anchor. A rear anchor threaded steel bar is added at the rear end of the second rhomboid truss assembly a5. The size of the rear anchor threaded steel bar is φ36mm (PSB1080) threaded steel bar. The number of rear anchor threaded steel bars has been increased from the original three sets to five sets, and the size of the rear anchor pad plate has been adjusted from 200*150*170mm to 1500*500*30mm, thereby ensuring the stability of the hoisting equipment.

[0026] The fixing structure below the flange plate was adjusted accordingly. The fixing structure includes longitudinal main bars, transverse main bars, and stirrups. The diameter of the longitudinal and transverse main bars was increased from 16mm to 25mm, the spacing between two adjacent stirrups was adjusted to 15cm, and a steel plate was added to the bridge top surface at the front support of the flange plate. Grouting material was used to fill the space between the steel plate and the bridge top surface to ensure the stress at the front support.

[0027] The overall stability of the hoisting equipment is improved by adding a second diamond truss assembly a5, and a front upper crossbeam a3 is added to the second diamond truss assembly a5. Pad beams a8 are set on the two front upper crossbeams a3 for installing the crane a4, which improves the strength and rigidity of the equipment and enables the steel box girder to be lifted as a whole, thereby reducing the frequency of high-altitude operations, reducing safety risks, and making the lifting process more efficient and shortening the construction period. The crane a4 can precisely control the hoisting force and speed to ensure that the steel box girder is placed smoothly.

[0028] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A mid-span steel beam hoisting device, comprising a steel box girder bridge deck crane installed on a constructed bridge deck, the steel box girder bridge deck crane comprising at least three sets of parallel first rhomboid truss assemblies (a1), the first rhomboid truss assemblies (a1) being connected by connecting assemblies (a2), a front upper crossbeam (a3) ​​being provided at the upper front end of the first rhomboid truss assembly (a1), a hoisting machine (a4) for hoisting the bridge being provided on the front upper crossbeam (a3), and a transverse connecting rod for connecting the first rhomboid truss assemblies (a1) being transversely provided below the front upper crossbeam (a3), characterized in that: The steel box girder bridge deck crane (a) also includes a set of second diamond truss assemblies (a5) arranged parallel to the left side of the first diamond truss assembly (a1) on the left, and a set of second diamond truss assemblies (a5) arranged parallel to the right side of the first diamond truss assembly (a1) on the right. The second diamond truss assemblies (a5) are connected to the adjacent first diamond truss assemblies (a1) by cross bracing (a6). At least three sets of horizontal bracing (a7) are added laterally between the first diamond truss assemblies (a1) to increase the overall strength. A front upper crossbeam (a3) ​​is added to the second diamond truss assembly (a5). The two front upper crossbeams (a3) ​​are arranged parallel to each other, and a pad beam (a8) for installing the crane (a4) is provided above them.

2. The integral hoisting equipment for mid-span steel beams according to claim 1, characterized in that: The second rhomboid truss assembly (a5) has the same shape and size as the first rhomboid truss assembly (a1). Both the second rhomboid truss assembly (a5) and the first rhomboid truss assembly (a1) include an upper horizontal bar (a11), a lower horizontal bar (a12), a front diagonal bar (a13), a rear diagonal bar (a14), and a vertical bar (a15). The members are connected by 45# steel pins with a diameter of 169mm. The upper horizontal bar (a11), lower horizontal bar (a12), front diagonal bar (a13), and rear diagonal bar (a14) are connected in a rhomboid shape. The vertical bar (a15) is connected at the diagonal of the rhomboid.

3. The integral hoisting equipment for mid-span steel beams according to claim 2, characterized in that: The connecting assembly (a2) includes a parallel upper chord (a16) and a lower chord (a17). The upper chord (a16) is located at the connection between the top of the upright (a15) and the end of the upper horizontal bar (a11). The lower chord (a17) is located in the middle of the upright (a15). Vertically arranged vertical web members (a18) and inclined web members (a19) are spaced apart between the upper chord (a16) and the lower chord (a17). The upper chord (a16) and the lower chord (a17) are made of 220×220×10mm square steel, and the vertical web members (a18) and the inclined web members (a19) are made of 150×150×6mm square steel, with the material being Q345B. The connecting assembly (a2) is bolted to the first diamond truss assembly (a1).

4. The integral hoisting equipment for mid-span steel beams according to claim 1, characterized in that: The number of cranes (a4) is five, with two cranes set on the front and back sides of the upper front beam (a3) ​​and one crane set in the middle. The cranes (a4) use 200t hydraulic continuous jacks, and the jacks use 15×7-φs15.2 steel strands to lift the steel box girder.

5. The integral hoisting equipment for mid-span steel beams according to claim 4, characterized in that: The second rhomboid truss assembly (a5), the first rhomboid truss assembly (a1), and the front upper crossbeam (a3) ​​are provided with channels for connecting steel strands to the steel box girder.

6. The integral hoisting equipment for mid-span steel beams according to claim 3, characterized in that: The horizontal bracing (a7) is respectively installed in the middle of the upper horizontal bar (a11), the middle of the lower horizontal bar (a12), and the end of the vertical bar (a15).

7. The integral hoisting equipment for mid-span steel beams according to claim 6, characterized in that: The second rhomboid truss assembly (a5) is provided with a cross brace (a6) at the connection point between the first rhomboid truss assembly (a1), the horizontal brace (a7), and the connecting assembly (a2) at the upper chord (a16) and lower chord (a17).

8. The integral hoisting equipment for mid-span steel beams according to claim 6, characterized in that: A connecting rod (a9) is provided at an interval between the transverse connecting rod and the horizontal connecting rod (a7) located in the middle of the upper horizontal rod (a11).

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