Arch rib lifting device

Abstract

The present invention relates to the technical field of bridge construction, and particularly relates to an arch rib lifting device. By providing paired lifting units, a tensioning mechanism is connected between the lifting units; the lifting unit includes a lifting anchor box and a lifting support beam. One end of the lifting anchor box is connected to a lifting mechanism, and the other end of the lifting anchor box is connected to the lifting support beam through a lifting lug. One end of the lifting support beam close to the lifting anchor box is connected to a tensioning ear plate, and a clamping space for clamping the arch rib is formed between the tensioning ear plate and the lifting anchor box. The arch rib is clamped between the tensioning ear plate and the lifting anchor box by this device, and the lifting force of the arch rib acts on the tensioning ear plate through the lifting support beam. There is no situation where the weld of the lifting lug above the arch rib is stressed, the force path is improved, the force stability of the arch rib lifting is improved, and at the same time, the welding and removal work of the ear plate and the lifting lug on the arch rib are avoided, the construction steps are reduced, and the construction efficiency and safety are greatly improved.

Description

Technical Field

[0001] The present invention relates to the technical field of bridge construction, and particularly to an arch rib lifting device. Background Art

[0002] During the bridge construction process, it is necessary to lift the arch rib. The traditional lifting method is to weld lifting lugs at the upper end of the arch rib and ear plates at the lower end, and connect and pull the lifting lugs and ear plates through the lifting anchor box to lift the arch rib.

[0003] Although this method completes the lifting of the arch rib, it is necessary to weld the lifting lugs and ear plates on the arch rib, which increases the construction steps. During the lifting process of the arch rib, the lifting force acts on the arch rib through the lifting lugs welded on the arch rib. The weld between the lifting lug and the arch rib is a tensile weld, and it is difficult to ensure the lifting force. Moreover, after the arch rib is installed, it is necessary to cut off the welded lifting lugs and ear plates, which increases the amount of high-altitude operations, has low safety, and affects the construction progress. Summary of the Invention

[0004] The present invention provides an arch rib lifting device to solve the defects in the prior art that the arch rib lifting device needs to be welded to the arch rib, resulting in cumbersome processes and low safety, and to achieve safe and efficient construction of arch rib lifting.

[0005] The present invention provides an arch rib lifting device, including:

[0006] Lifting units arranged in pairs, with a tensioning mechanism connected between the lifting units;

[0007] Each lifting unit includes a lifting anchor box and a lifting support beam. One end of the lifting anchor box is connected to a lifting mechanism, and the other end of the lifting anchor box is connected to the lifting support beam through a lifting pull ear. One end of the lifting support beam close to the lifting anchor box is connected to a tensioning ear plate, and a clamping space for clamping the arch rib is formed between the tensioning ear plate and the lifting anchor box.

[0008] According to an embodiment of the present invention, the lifting pull ears are arranged in pairs on both sides of the clamping space.

[0009] According to an embodiment of the present invention, a stabilizing pile is provided on one side of the lifting anchor box, and the clamping space is formed between the stabilizing pile and the tensioning ear plate.

[0010] According to an embodiment of the present invention, one side of the tensioning ear plate relatively close to the stabilizing pile has a first abutting surface, and one side of the stabilizing pile relatively close to the tensioning ear plate has a second abutting surface, and the clamping space is formed between the first abutting surface and the second abutting surface.

[0011] According to an embodiment of the present invention, the first abutting surface and the second abutting surface are respectively concave arc surfaces.

[0012] According to an embodiment of the present invention, the first abutting surface and the second abutting surface are respectively inclined at the same angle.

[0013] According to an embodiment of the present invention, the tensioning lugs are respectively detachably connected to the lifting beam and the tensioning mechanism.

[0014] According to an embodiment of the present invention, the tensioning mechanism includes a cable and tensioning anchor boxes provided at both ends of the cable. Among them, one tensioning anchor box is connected to the tensioning lug of one lifting unit, and the other tensioning anchor box is connected to the tensioning lug of the other lifting unit.

[0015] According to an embodiment of the present invention, the cables are arranged horizontally in pairs, and a gap is formed between adjacent cables.

[0016] According to an embodiment of the present invention, the cable is a parallel wire member.

[0017] The arch rib lifting device provided by the present invention includes a pair of lifting units, and a tensioning mechanism is connected between the lifting units; the lifting unit includes a lifting anchor box and a lifting beam. One end of the lifting anchor box is connected to the lifting mechanism, and the other end of the lifting anchor box is connected to the lifting beam through a lifting lug. One end of the lifting beam close to the lifting anchor box is connected to a tensioning lug, and a clamping space for clamping the arch rib is formed between the tensioning lug and the lifting anchor box. By using this device, the arch rib is clamped between the tensioning lug and the lifting anchor box. The lifting force of the arch rib acts on the tensioning lug through the lifting beam. There is no situation where the weld of the lifting lug above the arch rib is stressed. The force path is improved, the force stability of the arch rib lifting is improved, and at the same time, the welding and removal work of the lugs and lifting lugs on the arch rib are avoided, the construction steps are reduced, and the construction efficiency and safety are greatly improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0019] Figure 1 is a schematic structural diagram of the arch rib providing device provided by the embodiment of the present invention;

[0020] Figure 2 is a side view of the arch rib providing device provided by the embodiment of the present invention;

[0021] Figure 3 is a top view of the tensioning mechanism provided by the embodiment of the present invention;

[0022] Figure 4 It is a schematic diagram of the construction state of the arch rib providing device provided by the embodiment of the present invention.

[0023] Reference numerals:

[0024] 100, arch rib; 200, lifting unit; 210, lifting anchor box; 220, lifting lug; 230, lifting beam; 240, tensioning lug; 241, first abutting surface; 250, stabilizing pile; 251, second abutting surface; 300, lifting mechanism; 400, tensioning mechanism; 410, cable; 420, tensioning anchor box; 500, temporary support. Detailed implementation manners

[0025] In order to make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions in the present invention will be clearly and completely described below with reference to the accompanying drawings in the present invention. Apparently, the described embodiments are a part rather than all of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present invention without any creative effort shall fall within the protection scope of the present invention.

[0026] In the description of the embodiments of the present invention, it should be noted that the orientation or positional relationships indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the embodiments of the present invention 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 thus cannot be construed as a limitation to the embodiments of the present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0027] In the description of the embodiments of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "connected" and "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0028] In the embodiments of the present invention, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may mean that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "underneath" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the horizontal height of the first feature is less than that of the second feature.

[0029] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the embodiments of the present invention. In this specification, the schematic representations of the above terms are not necessarily directed to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, without contradiction, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples.

[0030] The following will be combined with Figures 1-4 to describe the specific embodiments of the present invention.

[0031] The embodiments of the present invention provide an arch rib lifting device for lifting the bridge arch rib to a predetermined height to complete the installation of the arch frame of the bridge.

[0032] As Figure 4 shown, this embodiment has a pair of lifting units 200 arranged in pairs. The lifting units 200 are connected to the arch rib 100 to provide at least two lifting fulcrums for the arch rib 100. The opposite lifting units 200 are connected by a tensioning mechanism 400 to make the paired lifting units 200 into a whole to complete the lifting action of the arch rib 100.

[0033] As Figure 1 shown, the lifting unit 200 in this embodiment includes a lifting anchor box 210 and a lifting support beam 230. The upper end of the lifting anchor box 210 is connected to a lifting mechanism 300. The lower end of the lifting anchor box 210 is connected to the lifting support beam 230 through a lifting lug 220. One end of the lifting support beam 230 relatively close to the lifting anchor box 210 is connected to a tensioning ear plate 240. A clamping space for clamping the arch rib 100 is formed between the tensioning ear plate 240 and the lifting anchor box 210.

[0034] The arch rib 100 is clamped and fixed through the clamping space to ensure the stability of the arch rib 100 during the lifting process. While supporting the arch rib 100, the tensioning ear plate 240 is also connected to the tensioning mechanism 400, making the two lifting units 200 relatively stable and forming an integral whole, which is convenient for the lifting construction of the arch rib 100.

[0035] The embodiment of the present invention is composed of a lifting anchor box 210, a lifting lug 220, a lifting supporting beam 230, a tensioning ear plate 240 and a tensioning mechanism 400. The arch rib 100 is clamped between the tensioning ear plate 240 and the lifting anchor box 210. The lifting force of the arch rib 100 acts on the tensioning ear plate 240 through the lifting supporting beam 230. There are no lifting lugs and vertical connecting rib plates, and there is no situation where the welds of the lifting lugs above the arch rib 100 are stressed. The force path is improved, the force stability of the lifting of the arch rib 100 is improved, and at the same time, the welding and removal work of the ear plates and lifting lugs on the arch rib 100 are avoided, the construction steps are reduced, and the construction efficiency and safety are greatly improved.

[0036] This device cancels the lifting lugs and vertical connecting rib plates. The tensioning ear plate 240 bears both the horizontal tension force and the lifting force, enabling one structure to perform the functions of two structures, optimizing the structure and saving costs.

[0037] As Figure 2 described, in this embodiment, the lifting lugs 220 are arranged in pairs and are respectively located on both sides of the clamping space, so that the arch rib 100 is located between the two lifting lugs 220, providing a stable lifting force for the lifting supporting beam 230 and ensuring the stability of the lifting of the arch rib 100.

[0038] As Figure 1 shown, in one embodiment, a stabilizing pile 250 is provided on one side of the lifting anchor box 210. The stabilizing pile 250 extends towards the tensioning ear plate 240, and the clamping space as described above is formed between the stabilizing pile 250 and the tensioning ear plate 240. That is to say, the upper surface of the arch rib 100 may not be directly in contact with the lifting anchor box 210. By providing a stabilizing pile 250 to abut against the upper surface of the arch rib 100, a more stable clamping force is provided for the arch rib 100.

[0039] As Figure 2 shown, the side of the tensioning ear plate 240 relatively close to the stabilizing pile 250 has a first abutting surface 241, and the side of the stabilizing pile 250 relatively close to the tensioning ear plate 240 has a second abutting surface 251. The clamping space is formed between the first abutting surface 241 and the second abutting surface 251. The first abutting surface 241 and the second abutting surface 251 respectively abut against the lower surface and the upper surface at the position of the lifting connection point of the arch rib 100 to clamp the arch rib 100 stably, which is convenient for the lifting of the arch rib 100.

[0040] Since the upper and lower surfaces of the arch rib 100 are arc surfaces, in this embodiment, the first abutting surface 241 and the second abutting surface 251 are respectively concave arc surfaces, and the concave arc surfaces of the first abutting surface 241 and the second abutting surface 251 are arranged opposite to each other, so as to surround the lower surface and the upper surface of the position where the arch rib 100 is lifted, increase the contact area, and stably clamp the arch rib 100.

[0041] In this embodiment, both sides of the arch rib 100 are inclined. Therefore, the first abutting surface 241 and the second abutting surface 251 are respectively inclined at the same angle, and the inclination angle is the same as the inclination degree of the arch rib 100, so as to ensure that the first abutting surface 241 and the second abutting surface 251 fit the surface of the arch rib 100 and increase the lifting force-bearing area of the arch rib 100.

[0042] In one embodiment, the tensioning lugs 240 are respectively detachably connected to the lifting support beam 230 and the tensioning mechanism 400. Preferably, the tensioning lugs 240 are respectively bolted to the lifting support beam 230 and the tensioning mechanism 400, which is convenient for disassembly. After the arch rib 100 is lifted, the tensioning lugs 240 are convenient to disassemble from the lifting support beam 230 and the tensioning mechanism 400, and can be reused.

[0043] In one embodiment, the arch rib 100 and the tensioning lugs 240 can be welded. Welding is used as an auxiliary connection means to further improve the connection strength. After the arch rib 100 is lifted, the weld points between the arch rib 100 and the tensioning lugs 240 can be removed. Compared with the traditional method of removing the redundant welds of the lifting lugs and the lugs, in this embodiment, only the welded structure at the tensioning lugs 240 needs to be cut off, which greatly reduces the cutting work of the on-site high-altitude operation.

[0044] Furthermore, the tensioning lugs 240 can be welded to the arch rib 100 in the factory and then transported to the site together. The weld quality is guaranteed, and at the same time, the on-site welding work is reduced. The width of the welded member is generally 4.5m, which is convenient for transportation.

[0045] As Figure 1 shown, in this embodiment, the tensioning mechanism 400 includes a cable 410 and tensioning anchor boxes 420 provided at both ends of the cable 410. Among them, one tensioning anchor box 420 is connected to the tensioning lug 240 of one lifting unit 200, and the other tensioning anchor box 420 is connected to the tensioning lug 240 of the other lifting unit 200. The cable 410 provides a tensile force between the two lifting units 200 to ensure the relative stability of the two lifting units 200 and facilitate the stable lifting of the arch rib 100.

[0046] As Figure 3As shown in the figure, in this embodiment, the stay cables 410 are arranged horizontally in pairs, and a gap is formed between adjacent stay cables 410. A temporary support 500 can be arranged inside the gap. The projection of the arch rib 100 is located within the gap, and the temporary support 500 is located directly below the arch rib 100 and is used to support the entire arch rib 100 before the lifting unit 200 starts lifting. In this embodiment, the position of the stay cable 410 does not conflict with that of the temporary support 500. Therefore, during the lifting process of the arch rib 100, the temporary support 500 does not need to be removed.

[0047] In the traditional horizontal stay cables, there is a single set on one side, and the stay cables are located directly below the arch rib 100. When installing the stay cables, it is generally necessary to remove the temporary support 500 or the distribution beam at its top, and the support of the arch rib 100 cannot be guaranteed. As an optimized solution in this embodiment, the single set of horizontal stay cables on one side is divided into two groups through the tensioning anchor box 420 and distributed on both sides of the temporary support 500. In this way, it is not necessary to remove the distribution beam on the top of the temporary support 500 before the arch rib 100 is lifted, and the distribution beam is retained throughout the lifting process. In this way, in case of an emergency, the arch rib 100 lifted in mid-air can still descend and be placed on the distribution beam again, restoring to the initial state.

[0048] In one embodiment, the stay cable 410 is a parallel wire member, which can be a parallel wire sling. Since the traditional stay cable uses prestressed steel strands, the number is large and the bite marks of the wedges are deep after repeated use, so it is necessary to check or replace them frequently. The tensioning and releasing process uses single jack for single strand tensioning, which takes a long time and has low work efficiency. The parallel wire sling in this embodiment has a fast tensioning speed and a high reuse rate.

[0049] The components such as the lifting anchor box 210, lifting lugs 220, lifting beams 230, tensioning anchor box 420, stay cables 410, etc. in this embodiment can be reused, and the amortized cost after multiple uses is low, which is conducive to cost saving.

[0050] The lifting device in this embodiment has a clear structural force direction and high safety; all components of the entire lifting device can be processed in the factory, and only assembly is carried out on site, with a high degree of industrialization, reducing the skill requirements for on-site workers.

[0051] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. An arch rib lifting device, characterized in that, Including: Lifting units (200) arranged in pairs, with a tensioning mechanism (400) connected between the lifting units (200); The lifting unit (200) includes a lifting anchor box (210) and a lifting support beam (230). One end of the lifting anchor box (210) is connected to a lifting mechanism (300), and the other end of the lifting anchor box (210) is connected to the lifting support beam (230) through a lifting lug (220). One end of the lifting support beam (230) close to the lifting anchor box (210) is connected to a tensioning ear plate (240), and a clamping space for clamping the arch rib (100) is formed between the tensioning ear plate (240) and the lifting anchor box (210); A stabilizing pile (250) is provided on one side of the lifting anchor box (210), and the clamping space is formed between the stabilizing pile (250) and the tensioning ear plate (240); One side of the tensioning ear plate (240) relatively close to the stabilizing pile (250) has a first abutting surface (241), and one side of the stabilizing pile (250) relatively close to the tensioning ear plate (240) has a second abutting surface (251), and the clamping space is formed between the first abutting surface (241) and the second abutting surface (251); The tensioning ear plate (240) is detachably connected to the lifting support beam (230) and the tensioning mechanism (400) respectively.

2. The arch rib lifting device according to claim 1, wherein, The lifting lugs (220) are arranged in pairs on both sides of the clamping space.

3. The arch rib lifting device according to claim 1, characterized in that, The first abutting surface (241) and the second abutting surface (251) are respectively concave arc surfaces.

4. The arch rib lifting device according to claim 1, wherein The first abutting surface (241) and the second abutting surface (251) are respectively inclined at the same angle.

5. The arch rib lifting device according to any one of claims 1-4, characterized in that, The tensioning mechanism (400) includes a cable (410) and tensioning anchor boxes (420) arranged at both ends of the cable (410). Among them, one tensioning anchor box (420) is connected to the tensioning ear plate (240) of one lifting unit (200), and the other tensioning anchor box (420) is connected to the tensioning ear plate (240) of the other lifting unit (200).

6. The arch rib lifting device according to claim 5, wherein, The cables (410) are arranged horizontally in pairs, and a gap is formed between adjacent cables (410).

7. The arch rib lifting device according to claim 5, characterized in that, The cable (410) is a parallel wire member.

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