Drawing device and bridge

Abstract

The utility model relates to the technical field of bridge engineering, in particular to a drawing device and a bridge. The drawing device comprises an upper connecting assembly, a lower connecting assembly and an adjusting assembly; one end of the adjusting assembly is connected with the upper connecting assembly, and the adjusting assembly can be connected to the box girder; the other end of the adjusting assembly is connected with the lower connecting assembly, and the adjusting assembly can be connected to the bridge abutment. Through the synergistic effect of the adjusting assembly, the upper connecting assembly and the lower connecting assembly, dynamic adjustment of the longitudinal drawing force of a bridge is achieved, and the deformation difference between a box girder and a bridge abutment is compensated; meanwhile, due to the split type structural design (including the upper connecting assembly, the lower connecting assembly and the adjusting assembly), the stress concentration risk is reduced, and the anchoring reliability is improved; in addition, the installation process is simplified through a modular connection mode, the reinforcing requirements of different bridge structures are met, and a flexible adjustment space is provided for construction errors and later maintenance.

Description

TECHNICAL FIELD

[0001] The utility model relates to bridge engineering technical field, specifically, relate to a drawing device and bridge. BACKGROUND

[0002] With the continuous development of urban infrastructure, many existing bridges need to be reinforced to improve their overturning resistance due to the improvement of design standards or the increase of service life.

[0003] In order to ensure the safe operation of the bridge, prevent dangerous conditions such as box girder displacement and overturning, a reliable connecting and reinforcing device is urgently needed. SUMMARY

[0004] The utility model aims at providing a drawing device and bridge, which can improve the connection strength and the overturning resistance of the bridge.

[0005] In a first aspect, the utility model provides a drawing device, which comprises an upper connecting assembly, a lower connecting assembly and an adjusting assembly.

[0006] One end of the adjusting assembly is connected with the upper connecting assembly, so that the adjusting assembly can be connected to the box girder.

[0007] The other end of the adjusting assembly is connected with the lower connecting assembly, so that the adjusting assembly can be connected to the abutment.

[0008] In an optional embodiment, the adjusting assembly comprises a vertical connecting plate, a horizontal connecting plate and a connecting piece.

[0009] One end of the vertical connecting plate is fixedly connected with the upper connecting assembly, and the other end has a connecting through hole.

[0010] The other end of the vertical connecting plate is fixedly connected with the lower connecting assembly, and the other end has a connecting waist hole.

[0011] The connecting piece is fixed after passing through the connecting through hole and the connecting waist hole, and is used for fixedly connecting the vertical connecting plate and the horizontal connecting plate together.

[0012] In an optional embodiment, the length direction of the connecting waist hole is horizontally arranged.

[0013] In an optional embodiment, the vertical connecting plate and the horizontal connecting plate are arranged perpendicularly.

[0014] In an optional embodiment, the number of the horizontal connecting plates is two, and the two horizontal connecting plates are arranged on opposite sides of the vertical connecting plate respectively.

[0015] In an optional embodiment, the lower connecting assembly comprises a lower anchoring bolt and a lower anchoring plate.

[0016] The lower anchoring plate is provided with a plurality of lower anchoring holes, and the lower anchoring bolt is fixedly arranged on the pier and the abutment through the lower anchoring holes.

[0017] In an optional embodiment, a reinforcing rib plate is arranged between the lower anchoring plate and the adjusting assembly.

[0018] In an optional embodiment, the upper connecting assembly comprises an upper anchoring bolt and an upper anchoring plate.

[0019] The upper anchoring plate is provided with a plurality of upper anchoring holes, and the upper anchoring bolt is fixedly arranged on the box girder through the upper anchoring holes.

[0020] In an optional embodiment, the outer surface of the adjusting assembly is provided with a corrosion-resistant coating.

[0021] The corrosion-resistant coating comprises, in sequence, an epoxy zinc-rich primer, an epoxy cloud iron intermediate paint and a fluorocarbon topcoat.

[0022] In a second aspect, the utility model provides a kind of bridge, comprising the drawing device of any one of the preceding embodiments.

[0023] The utility model embodiment has the following beneficial effects:

[0024] Through the synergistic effect of the adjusting assembly and the upper connecting assembly and the lower connecting assembly, the dynamic adjustment of the longitudinal drawing force of the bridge is realized, and the deformation difference between the box girder and the abutment is compensated. At the same time, the stress concentration risk is reduced by the split structure design (divided into three parts of the upper connecting assembly, the lower connecting assembly and the adjusting assembly), and the anchoring reliability is improved. In addition, the installation process is simplified by the modular connection mode, the reinforcement needs of different bridge structures are adapted, and flexible adjustment space is provided for construction error and later maintenance. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the technical scheme of the utility model embodiment, the following will briefly introduce the drawings needed to be used in the embodiment, and it should be understood that the following drawings only show some embodiments of the utility model, and should not be regarded as the limitation to the scope. For ordinary skilled person in the art, other related drawings can also be obtained from these drawings without creative labor.

[0026] Figure 1 The structure diagram of the drawing device provided by the utility model embodiment is shown.

[0027] Figure 2 The side view of the drawing device provided by the utility model embodiment is shown.

[0028] Figure 3 A plan view of the drawing device provided by the embodiment of the present application is provided.

[0029] Figure 4 A structure schematic view of the upper anchoring plate of the drawing device provided by the embodiment of the present application is provided.

[0030] Figure 5 A structure schematic view of the lower anchoring plate of the drawing device provided by the embodiment of the present application is provided.

[0031] Figure 6 A structure schematic view of the transverse connecting plate of the drawing device provided by the embodiment of the present application is provided.

[0032] Figure 7 A structure schematic view of the vertical connecting plate of the drawing device provided by the embodiment of the present application is provided.

[0033] Icon: 1-upper anchoring plate; 2-vertical connecting plate; 3-transverse connecting plate; 4-connecting bolt; 5-lower anchoring plate; 6-lower anchoring hole; 7-upper anchoring hole; 8-connecting waist hole; 9-connecting through hole. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0035] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

[0036] It should be noted that: similar labels and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0037] In the description of the utility model, it needs to be explained that, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly used when the utility model product is used, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first", "second", "third" and the like are only used for differentiation in description and cannot be understood as indicating or implying relative importance.

[0038] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components must be absolutely horizontal or overhanging, but can be slightly inclined. For example, "horizontal" only means that it is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0039] In the description of the utility model, it also needs to be explained that, unless otherwise explicitly specified and limited, the terms "arrangement", "installation", "connection", "connection" should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication between two elements. For ordinary skilled persons in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0040] The utility model will be described in detail below Figures 1-7 Some embodiments of the utility model will be described in detail. In the case of no conflict, the following examples and features in the examples can be combined with each other.

[0041] In the first aspect, the utility model provides a drawing device, including upper connecting assembly, lower connecting assembly and adjusting assembly;The one end of adjusting assembly is connected with upper connecting assembly, can connect adjusting assembly on box girder;The other end of adjusting assembly is connected with lower connecting assembly, can connect adjusting assembly on abutment.

[0042] In this embodiment, through the synergistic effect of upper connecting assembly, lower connecting assembly and adjusting assembly, the dynamic adjustment of the longitudinal drawing force of the bridge is realized.

[0043] This arrangement not only compensates for the deformation difference between the box girder and the abutment, but also effectively deals with the possible structural changes of the bridge in the long-term use process. The flexibility of the adjusting assembly enables the drawing device to be adjusted according to the actual situation during installation and use, thereby ensuring the close connection between the device and the bridge structure.

[0044] In addition, the split structure design significantly reduces the risk of stress concentration and improves the reliability of anchoring, providing more stable support for bridge reinforcement.

[0045] In an optional embodiment, the adjusting assembly includes a vertical connecting plate 2, a horizontal connecting plate 3, and a connecting piece; one end of the vertical connecting plate 2 is fixedly connected with the upper connecting assembly, and the other end has a connecting through hole 9; one end of the vertical connecting plate 2 is fixedly connected with the lower connecting assembly, and the other end has a connecting waist hole 8; the connecting piece is fixed after passing through the connecting through hole 9 and the connecting waist hole 8, and is used to fixedly connect the vertical connecting plate 2 and the horizontal connecting plate 3 together.

[0046] In this embodiment, the horizontal connecting plate 3 is fixed on the vertical connecting plate 2 through the connecting piece passing through the connecting through hole 9 and the connecting waist hole 8. This structure design makes the pulling device have stable connection performance in both vertical and horizontal directions, significantly enhancing the overall strength and stability of the device.

[0047] The combined structure of the vertical connecting plate 2 and the horizontal connecting plate 3 provides the pulling device with strong shear resistance and bending resistance. During bridge reinforcement, this structure can effectively resist complex stresses caused by vehicle load, wind load, and earthquake action, etc.

[0048] In addition, by setting the connecting waist hole 8, the position of the horizontal connecting plate 3 can be adjusted according to actual needs during installation, so as to better adapt to the geometric shape and stress distribution of the bridge.

[0049] This flexibility not only improves construction efficiency, but also provides convenience for subsequent maintenance and adjustment, further improving the practicality and reliability of the pulling device.

[0050] Specifically, in this embodiment, the connecting through hole 9 of the vertical connecting plate 2 is a circular hole, and the hole diameter matches the diameter of the connecting piece (such as high-strength connecting bolt 4), ensuring no gap during connection; the connecting waist hole 8 of the horizontal connecting plate 3 is a long strip-shaped hole, with the length direction horizontally arranged, allowing the horizontal connecting plate 3 to slide horizontally within a range of ±20mm.

[0051] This setting method makes the device adapt to the dynamic deformation between the box girder and the abutment, such as thermal expansion and contraction caused by temperature changes or displacement caused by pier settlement.

[0052] The locking mode of the connecting piece adopts a double-nut anti-loosening structure: after the connecting bolt 4 passes through the connecting hole 9 and the waist hole, the first nut is first fixed with a pre-tightening torque (200 N·m), and then the second nut is tightened in the opposite direction to offset the loosening risk caused by vibration. In addition, the surface of the connecting piece is galvanized (thickness ≥ 8 μm) to enhance the corrosion resistance. Tests show that the connecting structure remains stable under cyclic loading, and the pre-tightening force attenuation rate of the connecting bolt 4 is less than 5%.

[0053] In an optional embodiment, the length direction of the connecting waist hole 8 is horizontally arranged.

[0054] In this embodiment, this arrangement allows the transverse connecting plate 3 to be fine-tuned in the horizontal direction during installation, thereby better adapting to the installation errors and deformation requirements of the bridge. At the same time, the horizontally arranged connecting waist hole 8 can effectively disperse stress and reduce the risk of structural damage caused by stress concentration.

[0055] Specifically, in this embodiment, the core role of the horizontally arranged connecting waist hole 8 is to release transverse stress and compensate for construction errors. The waist hole has a length of 20 mm and a width of 10 mm, and the inner edge is chamfered (R = 2 mm) to avoid stress concentration. In the scenario of bridge transverse displacement (such as earthquakes or vehicle eccentric loading), the transverse connecting plate 3 can slide along the waist hole, with a maximum allowed transverse displacement of ± 5 mm, thereby reducing the shear stress of the connecting bolt 4.

[0056] During construction, the inner wall of the waist hole is sprayed with fluorescent marking lines, with a scale every 5 mm to assist construction personnel in rapid positioning. For example, when the box girder embedded part is offset by 10 mm, the transverse connecting plate 3 can be adjusted in the waist hole (locked after moving 10 mm) to achieve accurate centering.

[0057] In an optional embodiment, the vertical connecting plate 2 and the transverse connecting plate 3 are arranged perpendicular to each other.

[0058] In this embodiment, the vertical arrangement of the vertical connecting plate 2 and the transverse connecting plate 3 further optimizes the mechanical properties of the pulling device, enabling it to better withstand complex stress conditions; at the same time, it further enhances the structural stability of the pulling device, enabling it to maintain good working performance under complex stress conditions.

[0059] This perpendicular connection not only optimizes the mechanical properties but also simplifies the installation process and improves construction efficiency.

[0060] Specifically, in this embodiment, the vertical connecting plate 2 and the transverse connecting plate 3 are arranged perpendicularly to form an L-shaped or T-shaped rigid joint, significantly improving the bending and shear resistance.

[0061] More specifically, in this embodiment, the vertical connecting plate 2 mainly bears the axial pulling force when the pulling device is under stress, and the horizontal connecting plate 3 resists the lateral bending moment. Finite element simulation shows that under full load conditions, the maximum stress of the L-shaped or T-shaped node is 185 MPa (much lower than the material yield strength of 355 MPa), and the stress distribution is uniform without local stress concentration.

[0062] In addition, the vertical arrangement also simplifies the installation and positioning process, and only needs to ensure that the connecting plate is perpendicular to the axis of the box girder and abutment during construction.

[0063] In an optional embodiment, the number of horizontal connecting plates 3 is two, and the two horizontal connecting plates 3 are respectively arranged on opposite sides of the vertical connecting plate 2.

[0064] In this embodiment, this symmetrical arrangement further enhances the stability of the pulling device, enabling it to maintain balance when subjected to bidirectional tension. This design not only improves the connection strength between the pulling device and the abutment, but also further enhances the overall structure through the reinforcing rib plate.

[0065] The symmetrical arrangement of the two horizontal connecting plates 3 provides the pulling device with strong bidirectional tensile capacity. During the bridge reinforcement process, this design can effectively resist lateral forces caused by vehicle loads and wind loads, ensuring the stability of the pier.

[0066] In an optional embodiment, the lower connecting assembly includes a lower anchoring bolt and a lower anchoring plate 5; the lower anchoring plate 5 has a plurality of lower anchoring holes 6, and the lower anchoring bolt is fixedly arranged on the pier and the abutment through the lower anchoring holes 6.

[0067] In this embodiment, the lower anchoring plate 5 of the lower connecting assembly is a rectangular steel plate (size 400mm×400mm×30mm), and the surface is uniformly distributed with 4 anchoring holes with a diameter of 28mm, with a hole distance of 300mm.

[0068] The lower anchoring bolt is a M24 chemical anchoring bolt with a pre-buried depth of 300mm, and epoxy resin glue (tensile strength ≥ 35MPa) is poured to ensure anchoring reliability.

[0069] In an optional embodiment, a reinforcing rib plate is provided between the lower anchoring plate 5 and the adjusting assembly.

[0070] In this embodiment, the arrangement of the reinforcing rib plate effectively disperses stress and reduces the risk of structural damage caused by local stress concentration, thereby improving the reliability and durability of the pulling device.

[0071] Specifically, in this embodiment, the reinforcing rib plate is a triangular steel plate (right angle side 200mm x 200mm, thickness 10mm) welded between the lower anchoring plate 5 and the transverse connecting plate 3, forming a triangular support structure. Finite element analysis shows that the reinforcing rib plate reduces the maximum stress of the anchoring plate from 240MPa to 150MPa, and the stress concentration coefficient from 2.1 to 1.3.

[0072] In an optional embodiment, the upper connecting assembly includes an upper anchoring bolt and an upper anchoring plate 1; the upper anchoring plate 1 has a plurality of upper anchoring holes 7, and the upper anchoring bolt is fixedly arranged on the box girder through the upper anchoring holes 7.

[0073] In this embodiment, the combination of the upper anchoring bolt and the upper anchoring plate 1 provides a reliable connection foundation for the pulling device. Through the design of the plurality of upper anchoring holes 7, the upper anchoring bolt can uniformly distribute stress, ensuring firm connection between the pulling device and the box girder.

[0074] This design not only applies to different types of box girder structures, but also maintains good connection performance in complex construction environments.

[0075] Specifically, in this embodiment, the upper anchoring plate 1 of the upper connecting assembly is a rectangular steel plate with dimensions of 500mm x 300mm x 30mm, and 5 anchoring holes with a diameter of 28mm are provided on the flange. The upper anchoring bolt is an M24 expansion bolt with a pre-buried depth of 200mm, and a pre-tightening force of 150N·m is applied through a torque wrench during installation.

[0076] In this embodiment, a rubber gasket (thickness 5mm) is provided at the connection between the upper anchoring plate 1 and the adjusting assembly, which serves to buffer vibrations and prevent wear caused by direct metal contact.

[0077] In an optional embodiment, the outer surface of the adjusting assembly is provided with a corrosion-resistant coating; the corrosion-resistant coating includes an epoxy zinc-rich primer, an epoxy cloud iron intermediate paint, and a fluorocarbon topcoat in sequence.

[0078] In this embodiment, the provision of the corrosion-resistant coating further improves the durability of the pulling device. The combined coating system of the epoxy zinc-rich primer, the epoxy cloud iron intermediate paint, and the fluorocarbon topcoat can effectively resist the erosion of ultraviolet light, rainwater, and salt spray, ensuring that the pulling device remains in good working condition during long-term use.

[0079] The corrosion-resistant coating provided in this embodiment not only prolongs the service life of the pulling device, but also reduces subsequent maintenance costs, improving its economy and practicality.

[0080] In a second aspect, the utility model provides a bridge, including any one of the foregoing embodiments of the pulling device.

[0081] The embodiment of the utility model has the advantages of

[0082] Through the synergistic effect of the adjusting assembly, the upper connecting assembly and the lower connecting assembly, the dynamic adjustment of the longitudinal pulling force of the bridge is realized, and the deformation difference between the box girder and the abutment is compensated. Meanwhile, the split structure design (divided into three parts of the upper connecting assembly, the lower connecting assembly and the adjusting assembly) reduces the risk of stress concentration and improves the anchoring reliability. In addition, the modular connection method simplifies the installation process, meets the reinforcement needs of different bridge structures, and provides flexible adjustment space for construction errors and later maintenance.

[0083] The above is only the preferred embodiment of the utility model and is not used to limit the utility model. For those skilled in the art, the utility model can have various changes and variations. Any modification, equivalent replacement, improvement, etc. within the spirit and principles of the utility model shall be included in the protection scope of the utility model.

Claims

1. A drawing device, characterized in that, Includes upper connection components, lower connection components, and adjustment components; One end of the adjustment component is connected to the upper connecting component, enabling the adjustment component to be connected to the box girder; The other end of the adjustment component is connected to the lower connection component, enabling the adjustment component to be connected to the bridge platform.

2. The drawing device of claim 1, wherein The adjustment assembly includes a vertical connecting plate, a horizontal connecting plate, and a connector; One end of the vertical connecting plate is fixedly connected to the upper connecting assembly, and the other end has a connecting through hole; One end of the vertical connecting plate is fixedly connected to the lower connecting assembly, and the other end has a connecting waist hole; The connector passes through the connecting through hole and the connecting waist hole and is then fixed, used to fix the vertical connecting plate and the horizontal connecting plate together.

3. The drawing device of claim 2, wherein The length direction of the connecting waist hole is set horizontally.

4. The drawing device of claim 2, wherein The vertical connecting plate and the horizontal connecting plate are arranged perpendicular to each other.

5. The drawing device of claim 2, wherein The number of horizontal connecting plates is two, and the two horizontal connecting plates are respectively arranged on opposite sides of the vertical connecting plate.

6. The drawing device of claim 1, wherein The lower connecting assembly includes a lower anchor bolt and a lower anchor plate; The lower anchor plate has multiple lower anchor holes, and the lower anchor bolts pass through the lower anchor holes and are fixedly installed on the piers and abutments.

7. The drawing device of claim 6, wherein A reinforcing rib is provided between the lower anchor plate and the adjustment assembly.

8. The drawing device of claim 1, wherein The upper connecting assembly includes an upper anchor bolt and an upper anchor plate; The upper anchor plate has multiple upper anchor holes, and the upper anchor bolts pass through the upper anchor holes and are fixedly mounted on the box girder.

9. The drawing device of claim 1, wherein, The outer surface of the adjustment component is provided with an anti-corrosion coating; The anti-corrosion coating comprises, in sequence, an epoxy zinc-rich primer, an epoxy micaceous iron oxide intermediate coat, and a fluorocarbon topcoat.

10. A bridge, characterized by Includes the drawing device as described in any one of claims 1-9.

Images