A support device for lifting and reconstructing a bridge and a construction method

Abstract

The application discloses a support device and a construction method for lifting and reconstructing a bridge, solves the problems of inconvenient installation of distribution beams and a large number of jacks required in the support system for bridge lifting construction in the prior art, has the beneficial effects of not damaging the bridge and reducing the construction difficulty, and specifically has the following arrangement: a support device for lifting and reconstructing a bridge, which comprises a holding pole, a hoisting mechanism is arranged on the holding pole to control the lifting of a distribution beam, the holding pole is arranged on both sides of the distribution beam, a plurality of plane frame systems are arranged between the holding poles on the two sides, two adjacent plane frame systems are connected to form a space frame system, the plane frame system comprises a plurality of vertical connecting pieces, the vertical connecting pieces in the plane frame system are connected with the distribution beam at the top, the adjacent two vertical connecting pieces are connected through a connecting beam, a jack component is arranged between the vertical connecting piece and a working surface, and a first assembly with adjustable height is arranged between the connecting beam at the bottom side of the plane frame system and the working surface.

Description

Technical Field

[0001] This invention relates to the field of bridge construction technology, and in particular to a support device and construction method for upgrading and modifying bridges. Background Technology

[0002] The statements in this section are merely background information related to the present invention and do not necessarily constitute prior art.

[0003] With the concentration of urban population, some existing roads can no longer meet the needs of urban travel, necessitating the renovation of existing roads, bridges, and other facilities. Furthermore, as urban road network construction progresses, conflicts arise between existing bridge structures and new ones, such as insufficient clearance for existing elevated bridges or the need for seamless connections between existing and new bridges. Therefore, existing bridges need to be renovated, and a common method is to raise their elevation through jacking construction.

[0004] The general process of bridge jacking construction is as follows: First, the distribution beam is hoisted at the bottom of the bridge to be lifted; then, temporary supports are erected at the bottom of the bridge and jacking jacks and follow-up jacks are installed; then, the bridge is lifted to the designated elevation step by step by working in a cycle with the jacking jacks and follow-up jacks; after the modification of the lower support structure such as the foundation and piers of the bridge is completed, the bridge deck is lowered, the temporary supports and jacks are removed, and the construction is completed.

[0005] The inventors discovered the following problems with the above bridge jacking construction process:

[0006] Firstly, the distribution beam needs to be hoisted and fixed at the bottom of the bridge to be lifted. This requires drilling holes and embedding anchoring components at the bottom of the bridge. After the lifting operation is completed, the distribution beam also needs to be removed. The process of dismantling and installing the distribution beam inevitably damages the existing bridge's box girder, and the construction steps are complicated.

[0007] Secondly, during the bridge jacking process, due to the limited stroke of the jacks and to prevent instability and overturning, the bridge cannot be jacked into place in one go; it needs to be jacked into place in multiple stages. During this staged jacking process, to prevent instability and overturning, the jack support system needs to be raised synchronously after each step. When the jacks used to lift the bridge release pressure during this raising process, additional follow-up jacks are needed to continue supporting the bridge. This significantly increases the number of jacks required, raising the hardware costs of the construction, increasing preparation time, and increasing the difficulty of controlling the entire construction system.

[0008] Third, during the bridge jacking process, the construction of temporary supports requires the erection of scaffolding, which necessitates working at heights and poses certain safety hazards. Summary of the Invention

[0009] To address the shortcomings of existing technologies, the purpose of this invention is to provide a support device for bridges that improves and modifies the structure so that the distribution beam is not connected to the box girder, facilitating the hoisting of the distribution beam and providing stable support for it; the number of jacks is effectively controlled, reducing construction difficulty.

[0010] To achieve the above objectives, the present invention is implemented through the following technical solution:

[0011] A support device for upgrading and modifying a bridge includes a gantry, a lifting mechanism on which a distribution beam is controlled to raise and lower. The gantry is located on both sides of the distribution beam, and multiple planar frame systems are set between the two gantry. Adjacent planar frame systems are connected to form a spatial frame system. The planar frame system includes several vertical connectors. The vertical connectors in the planar frame system are connected to the top distribution beam. Adjacent vertical connectors are connected by connecting beams. A jack component is set between the vertical connector and the working surface. A height-adjustable first component is set between the bottom connecting beam of the planar frame system and the working surface. A height-adjustable second component can be set between the jack component and the working surface.

[0012] As described above, the support device uses a lifting pole to raise the distribution beam. The distribution beam is connected to the vertical connectors of the spatial frame system. The spatial frame system has a reasonable structural design, forming a three-dimensional force-bearing system that can stably support the distribution beam, thus facilitating on-site construction. A second component is set between the jack component and the working surface, and a first component is set between the bottom connecting beam and the working surface. The height of the first component can be raised as the jack component is lifted, which in turn raises the height of the second component. This eliminates the need for additional follow-up jack components, thus reducing the hardware costs of construction.

[0013] As described above, a support device for upgrading and modifying a bridge includes a support pole base that supports a support pole column, a support pole beam that is installed at the top of the support pole column, and the support pole beam that is connected to the lifting mechanism.

[0014] The support beam is located on the side of the support column.

[0015] As described above, a support device for upgrading and modifying a bridge includes a distribution beam comprising a frame beam body, with lifting lugs on both sides of the frame beam body that can be connected to a lifting mechanism, and a first opening on the bottom side of the frame beam body that connects to the vertical connector; the distribution beam is located at the top of the corresponding planar frame system, and the distribution beam is connected to multiple vertical connectors in the corresponding planar frame system respectively;

[0016] The frame beam is provided with several stiffening ribs, the positions of which correspond to the positions of the vertical connecting members, thereby improving the structural strength of the distribution beam and preventing excessive load on the jack components during jacking, which could lead to local instability and failure of the distribution beam.

[0017] As described above, a support device for upgrading and modifying a bridge includes a vertical connector comprising several sequentially connected column segments. Each column segment includes a pipe column, and both ends of the pipe column are respectively provided with connecting end plates. The connecting end plates have multiple second openings for connection with adjacent column segments. The vertical connector is formed by connecting multiple column segments, which facilitates on-site construction and hoisting of the vertical connector.

[0018] The tubular column is provided with a first threaded hole for connection with the connecting beam.

[0019] As described above, a bridge support device for upgrading and modifying bridges includes a connecting beam comprising a box girder, with end plates at both ends of the box girder and a third opening in each end plate for connection with the column segment.

[0020] As described above, in a bridge support device that upgrades and remodels a bridge, considering that some connecting beams need to be connected to the first component, some of the connecting beams are provided with second threaded holes to connect to the first component.

[0021] As described above, a support device for upgrading and modifying a bridge includes a jack component comprising two first connecting plates, with a jack disposed between the two first connecting plates, and the first connecting plates having a third opening for connection with the vertical connecting member.

[0022] As described above, a support device for upgrading and modifying a bridge includes a first component comprising multiple pads and a second component comprising several pads.

[0023] The pad includes two second connecting plates, a connecting column is provided between the two second connecting plates, and the second connecting plates are provided with a fourth opening to connect with the jack component or the connecting beam.

[0024] As described above, a support device for upgrading and modifying a bridge is provided on the working surface, and the base supports the first component, the second component, or the jack component. The base is connected to the first component or the second component to ensure the stability of the device during the process of supporting the bridge.

[0025] This invention also provides a construction method for upgrading and modifying bridges, characterized by the following:

[0026] Erect a boom at the working face;

[0027] The lifting mechanism connects to the distribution beam and lifts the distribution beam;

[0028] Multiple vertical connectors are installed below the distribution beam. The top of the vertical connectors is connected to the distribution beam. Connecting beams are installed between two adjacent vertical connectors in the same row to form a planar frame system. Two adjacent planar frame systems are connected by connecting beams to form a spatial frame system.

[0029] The height of the space frame system is increased by lifting the distribution beam again using a crane mechanism, so that the distribution beam is located below the box girder and in contact with the box girder;

[0030] A jack component is installed at the bottom of the vertical connector;

[0031] An adjustable first component is installed between the bottommost connecting beam and the working surface in the planar frame system;

[0032] The box girder is lifted by the jack components. After the box girder is lifted to a set height, the height of the first component is raised. The jack components are then controlled to fall back down so that the first component can bear the weight of the space frame system.

[0033] The jack component is retracted, and a second component is set between the working surface and the jack component. After the second component is set, the stroke of the jack component is increased, so that the jack component and the second component are in close contact.

[0034] Repeat the lifting of the jack components until the box girder is raised to the set elevation and held.

[0035] The beneficial effects of the present invention are as follows:

[0036] 1) This invention uses a lifting pole to lift the distribution beam, which is connected to the vertical connector of the spatial frame system. The spatial frame system has a reasonable structural design, forming a three-dimensional force-bearing system that can stably support the distribution beam, thus facilitating on-site construction. A second component is set between the jack component and the working surface, and a first component is set between the bottom connecting beam and the working surface. The height of the first component can be raised as the jack component is lifted, which in turn raises the height of the second component. There is no need to set up more follow-up jack components, which helps to reduce the hardware cost of construction.

[0037] 2) This invention uses a lifting mechanism with a jack to lift the distribution beam, eliminating the need to pre-install the distribution beam at the bottom of the bridge being lifted, i.e., eliminating the need to drill holes or roughen the concrete box girder for rebar installation. This avoids damage to the original structure during the lifting process, saves related construction steps, and improves construction efficiency.

[0038] 3) The first component and the second component of the present invention each include several pads. The height of the first component or the second component is adjusted by the pads. There is no need to set up additional follow jacks. The construction process can be completed by simply lifting the jack components. Compared with the traditional construction method, half of the jacks can be saved, saving the cost of construction machinery and reducing the control difficulty of the construction system.

[0039] 4) The entire support device of the present invention is assembled on the ground, without the need for high-altitude operations or construction scaffolding, thus ensuring good safety.

[0040] 5) In this invention, stiffening ribs are provided on the distribution beam to improve its structural strength and prevent excessive load on the jack components during jacking, which could lead to local instability and failure of the distribution beam. Lifting lugs are provided at both ends of the distribution beam to facilitate connection with the lifting mechanism, facilitate lifting, and also serve as a limit to prevent excessive lateral displacement of the distribution beam during lifting, which could affect construction safety.

[0041] 6) The construction method of this invention provides that the distribution beam and box girder are supported by a spatial support system, which greatly improves the reliability of the support and the stability during the jacking process. During the step-by-step jacking of the box girder, there is no need to set up additional follow-up jacks, the number of jacks is effectively controlled, which helps to reduce costs, reduce construction preparation time, and reduce construction difficulty. Attached Figure Description

[0042] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0043] Figure 1 This is a front view of a bridge support device that is upgraded according to one or more embodiments of the present invention.

[0044] Figure 2 This is a schematic diagram of a support pole in a bridge support device that is upgraded and modified according to one or more embodiments of the present invention.

[0045] Figure 3 This is a schematic diagram of the distribution beam in a bridge support device that is upgraded and modified according to one or more embodiments of the present invention.

[0046] Figure 4 This is a schematic diagram of a column segment in a bridge support device that is upgraded and modified according to one or more embodiments of the present invention.

[0047] Figure 5 This is a schematic diagram of a connecting beam in a bridge support device that is upgraded and modified according to one or more embodiments of the present invention.

[0048] Figure 6 This is a schematic diagram of a jack component in a bridge support device for upgrading and modifying a bridge according to one or more embodiments of the present invention.

[0049] Figure 7 This is a schematic diagram of a pad block in a bridge support device for upgrading and modifying a bridge according to one or more embodiments of the present invention.

[0050] Figure 8 This is a schematic diagram of the base in a bridge support device that is upgraded and modified according to one or more embodiments of the present invention.

[0051] The diagram exaggerates the spacing or dimensions between parts to show their positions; the diagram is for illustrative purposes only.

[0052] Wherein: 1-Pole support; 11-Pole support base; 12-Pole support column; 13-Pole support beam; 14-Electric hoist;

[0053] 2-Distribution beam; 21-Frame beam; 22-Stiffening rib; 23-Lifting lug;

[0054] 3-Column segment; 31-Pipe column; 32-First threaded hole; 33-Connecting end plate;

[0055] 4-Connecting beam; 41-Box beam; 42-Second threaded hole; 43-End plate;

[0056] 5-Jack component; 51-First connecting plate; 52-Handle; 53-Oil nozzle;

[0057] 6-Padded block; 61-Second connecting plate; 62-Connecting column;

[0058] 7-Base; 71-Third connecting plate; 72-Stiffening plate;

[0059] 8-Box girder. Detailed Implementation

[0060] It should be noted that the following detailed description is illustrative and intended to provide further explanation of the invention. Unless otherwise specified, all technical and scientific terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0061] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of exemplary embodiments according to the invention. As used herein, unless otherwise expressly indicated by the invention, the singular form is also intended to include the plural form. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0062] As described in the background section, existing support systems used for bridge jacking construction suffer from problems such as inconvenient installation of distribution beams and the need for a large number of jacks. In order to solve the above technical problems, this invention proposes a support device for bridges that can be upgraded by lifting.

[0063] Example 1

[0064] In a typical embodiment of the present invention, reference is made to Figure 1 As shown, a support device for upgrading and modifying a bridge includes a gantry 1. The gantry 1 is equipped with a lifting mechanism to control the lifting and lowering of a distribution beam 2. The gantry is located on both sides of the distribution beam 2. Multiple planar frame systems are set between the two gantry 1s. Adjacent planar frame systems are connected to form a spatial frame system. The planar frame system includes several vertical connectors. The vertical connectors in the planar frame system are connected to the top distribution beam. Adjacent vertical connectors are connected by connecting beams. A jack component 5 is set between the vertical connectors and the working surface. A height-adjustable first component is set between the bottom connecting beam of the planar frame system and the working surface. A height-adjustable second component can be set between the jack component and the working surface.

[0065] refer to Figure 2 As shown, the lifting pole 1 includes a lifting pole base 11, which supports a lifting pole column 12. A lifting pole beam 13 is installed on the top of the lifting pole column 12 and is connected to the lifting mechanism. In this embodiment, the lifting pole beam is located on the side of the lifting pole column, and the lifting pole beam 13 is perpendicularly connected to the lifting pole column 12. Bolt holes are provided on the lower side of the lifting pole base 11 for connection to the column base. The lifting pole base 11, the lifting pole column 12, and the lifting pole beam 13 are welded together as a whole. Both the lifting pole column 12 and the lifting pole beam 13 have an I-shaped cross-section, which achieves sufficient bending stiffness while saving materials.

[0066] In some examples, the pole base 11 has an I-shaped cross section, and vertical stiffening plates are provided on both sides of the pole base 11.

[0067] Specifically, the lifting mechanism uses an existing electric hoist 14, which is suspended on the bottom side of the lifting beam 13.

[0068] refer to Figure 3 As shown, the distribution beam 2 includes a frame beam body 21, which is a steel structural component. The frame beam body 21 includes two transverse sections arranged vertically, with the width of the lower transverse section being smaller than that of the upper transverse section. Lifting lugs 23 that can be connected to the lifting mechanism are respectively provided on both sides of the frame beam body 21. The lower middle transverse section of the frame beam body is provided with a first opening for connection with the vertical connector. The distribution beam 2 is located at the top of the corresponding planar frame system, and the distribution beam is connected to multiple vertical connectors in the corresponding planar frame system.

[0069] In some examples, the upper surface of the distribution beam 2 is fitted with rubber pads to prevent slippage or crush damage during the jacking process.

[0070] The hoisting ear plate 23 is welded to both sides of the frame beam 21, and the hoisting ear plate 23 is provided with bolt holes for connection with the electric hoist 14. In addition to hoisting, the hoisting ear plate 23 also serves as a limiter to prevent excessive lateral displacement of the distribution beam 2 during the lifting process, which would affect construction safety.

[0071] Several stiffening ribs 22 are provided inside the frame beam. The stiffening ribs 22 are perpendicular to the transverse section of the frame beam body 21. The position of the stiffening ribs 22 corresponds to the position of the vertical connectors, thereby improving the structural strength of the distribution beam and preventing excessive load on the jack components during jacking, which could lead to local instability and failure of the distribution beam. Specifically, the position of the stiffening ribs 22 corresponds to the distance between two adjacent vertical connectors in the planar frame system. One or more stiffening ribs 22 can be provided at the top of the vertical connectors.

[0072] It should be explained that the top of each planar frame system is supported by two distribution beams 2; each distribution beam is provided with a support rod 1 on both sides, and the two support rods 1 on the same plane are used to lift one distribution beam 2.

[0073] In this embodiment, the vertical connector includes several column segments 3 connected in sequence, which can be 3, 4, or 5. Each column segment 3 has the same height, which facilitates the splicing of the vertical connector on site. Each column segment is manufactured in the factory. Each column segment 3 includes a pipe column 31, which is a steel pipe column. Both ends of the pipe column 31 are respectively provided with connecting end plates 33. The connecting end plates 33 are annular structural components. Each side of the connecting end plates 33 has multiple second openings for connection with adjacent column segments. Connecting bolts pass through the connecting end plates of adjacent column segments and are locked with nuts to realize the connection of multiple column segments 3 to form a vertical connector, which facilitates the on-site construction and hoisting of the vertical connector.

[0074] It is understandable that the width of the lower transverse section of the frame beam is consistent with the width of the connecting end plate on one side, that is, the two distribution beams are connected to a column section.

[0075] It should be noted that the pipe column 31 is provided with a first threaded hole 32 for connection with the connecting beam 4. Each side of the pipe column 31 is provided with four first threaded holes 32. The first threaded holes 32 have standard threads inside for connection with the connecting beam 4. The location of the first threaded holes 32 corresponds to the location of the third opening on the end plate of the connecting beam so as to connect with bolts.

[0076] refer to Figure 5As shown, the connecting beam 4 includes a box beam 41 with a set length. End plates 43 are respectively provided at both ends of the box beam 41, and the end plates 43 are provided with a third opening for connection with the column segment.

[0077] Understandably, considering that some connecting beams need to be connected to the first component, some or all sides of the box beam 41 in the connecting beam are provided with second threaded holes 42 to connect with the first component. The second threaded holes 42 are located in the middle of the connecting beam, and continuous threads are provided in the holes of the second threaded holes 42.

[0078] refer to Figure 6 As shown, the jack component 5 includes two first connecting plates 51, and a jack is provided between the two first connecting plates 51. One first connecting plate 51 has a third opening to connect with the central column section of the vertical connector, and the third opening of the other first connecting plate 51 is used to connect with the second component. A handle 52 is provided on the outside of the jack, and the jack has an oil nozzle 53.

[0079] It should be explained that the first component includes multiple pads 6, and the second component includes several pads 6; there are multiple pads, and the structure of each pad 6 is the same, which facilitates the setting of the first component or the second component;

[0080] refer to Figure 7 As shown, the pad 6 includes two second connecting plates 61, and a connecting column 62 is provided between the two second connecting plates 61. The side length of the connecting column 62 is smaller than the side length of the second connecting plate. The connecting column is specifically a short steel pipe column. The second connecting plate is provided with a fourth opening for connection with the jack component or connecting beam, or for connection between two adjacent pads 6.

[0081] Furthermore, the position and size of the first opening in the lower transverse section of the distribution beam 2 correspond to the position and size of the second opening in the connecting end plate 33, and the position and size of the second opening in the connecting end plate 33 correspond to the position and size of the third opening in the first connecting plate 51 and the position and size of the fourth opening in the second connecting plate 61.

[0082] A base 7 is installed on the working face, supporting the first component, the second component, or the jack component. The base is connected to the first or second component to ensure the stability of the support device during the bridge support process; (Reference) Figure 8 As shown, the base 7 includes two third connecting plates 71 arranged vertically, with horizontal and vertical stiffening plates 72 arranged between the two third connecting plates. The third connecting plates 71 are provided with bolt holes for connection with the pad block 6.

[0083] It is easy to understand that all the bases are the same size, prefabricated in the factory and transported to the construction site for easy on-site construction.

[0084] The support device provided in this embodiment uses a lifting pole to lift the distribution beam. The distribution beam is connected to the vertical connector of the spatial frame system. The spatial frame system has a reasonable structural design, forming a three-dimensional force-bearing system that can stably support the distribution beam. There is no need to set up structural components on the box girder for connection with the distribution beam, which facilitates on-site construction. A second component is set between the jack component and the working surface, and a first component is set between the bottom connecting beam and the working surface. The height of the first component can be raised as the jack component is lifted, and the height of the second component can be raised accordingly to achieve gradual lifting. There is no need to set up more follow-up jack components, which helps to reduce the hardware cost of construction.

[0085] This embodiment also provides a construction method for upgrading and modifying a bridge, including the following:

[0086] S1: Erect a boom 1 on the working face and install an electric hoist 14. Install a base 7 at the lifting position.

[0087] S2: Connect the electric hoist 14 to the distribution beam 2 through the bolt holes of the lifting ear plate 23. After connection, the distribution beam 2 is lifted synchronously by the electric hoists 14 at both ends. Depending on the height of the workers on site, the beam is lifted to a height of about 2100-2400mm and then stopped.

[0088] S3: The workers connect a column segment 3 to the bottom side of the two distribution beams 2 on the working surface, and connect the column segments 3 located on the same plane in the planar frame system through connecting bolts and connecting beams to form a planar frame system;

[0089] S4: Connect the two adjacent planar frame systems through connecting bolts and connecting beams 4, that is, connect to the column segment 3 of the adjacent working plane to form a spatial frame system. After completion, the electric hoist 14 is lifted synchronously, and the lifting height is the height of one column segment 3.

[0090] S5: Repeat steps S3-S4 to install the remaining column segment 3 and connecting beam 4;

[0091] S6: Connect the jack components to the corresponding base 7 and column segment 3 using connecting bolts, and connect an appropriate number of pads 6 to the connecting beam 4;

[0092] S7: Check the installation quality, conduct a trial jacking process, and check the reliability of the support device;

[0093] S8: Use jacks to officially lift box girder 8. First, lift box girder 8 above the height of a pad block 6, then continue lifting for 1-2mm and pause.

[0094] S9: Under the pad 6 at the bottom of the lowest connecting beam 4 in each planar frame system, further install pad 6. After installation, control the jack to fall back. The first component bears the weight of the space frame system, distribution beam and box girder.

[0095] S10: The hydraulic cylinder of the jack retracts by the height of a pad block 6, and retracts by 1-2mm. Then, a pad block 6 is placed between the jack and the base 7.

[0096] S11: Increase the stroke of the jack to make the jack and pad 6 make tight contact, and pause after supporting the weight of the entire support device and box girder 8 again. Then, reliably connect the jack 5, pad 6 and base 7 with connecting bolts.

[0097] S12: Re-lift, repeat steps S8-S11 until box girder 8 is lifted to the specified elevation and held;

[0098] S13: Modify the bridge's foundation, piers, and other substructures. After completion, gradually loosen the jacks to allow box girder 8 to fall onto the modified bridge substructures.

[0099] S14: Dismantle in order from bottom to top. First, remove the base 7 and pad 6, then control the electric hoist 14 to drop the remaining support device, and dismantle layer by layer.

[0100] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A support device for upgrading and modifying bridges, characterized in that, The system includes a boom, which is equipped with a lifting mechanism to control the raising and lowering of the distribution beam. The boom is located on both sides of the distribution beam, and multiple planar frame systems are set between the two booms. Adjacent planar frame systems are connected to form a spatial frame system. The planar frame system includes several vertical connectors. The vertical connectors in the planar frame system are connected to the top distribution beam. Adjacent vertical connectors are connected by connecting beams. A jack component is set between the vertical connectors and the working surface. The bottommost connecting beam in the planar frame system is equipped with a height-adjustable first component between itself and the working surface. A height-adjustable second component is set between the jack component and the working surface. The gantry includes a gantry base that supports a gantry column, a gantry beam that is installed at the top of the gantry column and is connected to the lifting mechanism; the gantry beam is located on the side of the gantry column. The distribution beam includes a frame beam body, with lifting lugs on both sides of the frame beam body that can be connected to the lifting mechanism, and a first opening on the bottom side of the frame beam body that connects to the vertical connector; the frame beam body is provided with a plurality of stiffening ribs, the positions of which correspond to the positions of the vertical connectors; The vertical connector includes several column segments connected in sequence. Each column segment includes a pipe column. Connecting end plates are provided at both ends of the pipe column. The connecting end plates have multiple second openings for connection with adjacent column segments. The pipe column is provided with a first threaded hole for connection with the connecting beam. Connect a column segment to the bottom side of two distribution beams on the working face. Connect the column segments in the same plane of the planar frame system with connecting bolts and connecting beams to form a planar frame system. Connect the column segments of two adjacent planar frame systems with connecting bolts and connecting beams, that is, connect them to the adjacent working planes to form a spatial frame system. After completion, simultaneously lift the electric hoist in the hoisting mechanism to a height equal to the height of one column segment. Repeat and install the remaining column segments and connecting beams. The distribution beam is not connected to the box girder; The first component includes multiple pads, and the second component includes several pads; each pad includes two second connecting plates, a connecting column is provided between the two second connecting plates, and the second connecting plates are provided with a fourth opening to connect with the jack component or the connecting beam.

2. The support device for upgrading and modifying a bridge according to claim 1, characterized in that, The connecting beam includes a box girder, with end plates at both ends of the box girder, and a third opening on the end plate for connection with the column segment.

3. The support device for upgrading and modifying a bridge according to claim 1, characterized in that, The connecting beam is provided with a second threaded hole for connection with the first component.

4. The support device for upgrading and modifying a bridge according to claim 1, characterized in that, The jack component includes two first connecting plates, with a jack disposed between the two first connecting plates, and the first connecting plates have a third opening for connection with the vertical connecting member.

5. A support device for upgrading and modifying a bridge according to claim 1, characterized in that, The working surface is provided with a base, which supports the first component, the second component, or the jack component.

6. A construction method for upgrading and renovating bridges, characterized in that, The support device for upgrading and modifying a bridge according to any one of claims 1-5 includes the following: Erect a boom at the working face; The lifting mechanism connects to the distribution beam and lifts the distribution beam; Multiple vertical connectors are installed below the distribution beam. The top of the vertical connectors is connected to the distribution beam. Connecting beams are installed between two adjacent vertical connectors in the same row to form a planar frame system. Two adjacent planar frame systems are connected by connecting beams to form a spatial frame system. The height of the space frame system is increased by lifting the distribution beam again using a crane mechanism, so that the distribution beam is located below the box girder and in contact with the box girder; A jack component is installed at the bottom of the vertical connector; An adjustable first component is installed between the bottommost connecting beam and the working surface in the planar frame system; The box girder is lifted by the jack components. After the box girder is lifted to a set height, the height of the first component is raised. The jack components are then controlled to fall back down so that the first component can bear the weight of the space frame system. The jack component is retracted, and a second component is set between the working surface and the jack component. After the second component is set, the stroke of the jack component is increased, so that the jack component and the second component are in close contact. Repeat the lifting of the jack components until the box girder is raised to the set elevation and held.

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