Bridge support structure suitable for rapid construction of multi-unit box girder

Abstract

The application relates to a bridge support structure suitable for rapid construction of multiple box girders, the top of a pier column top receiving beam is provided with two box girders, a support mechanism between the pier column and the box girders comprises multiple fixed supports and detachable temporary supports; the temporary supports comprise middle supports and side supports located on both sides of the middle supports, the middle supports and the side supports both comprise top plates and bottom plates, lifting mechanisms are arranged between the top plates and the bottom plates, the lifting mechanisms in the middle supports are symmetrically arranged; a driving assembly for driving the movement of a moving sliding block is arranged between the top plate and the bottom plate in the middle support; the structure expands the stress section in the simultaneous construction process of the box girders through the lifting of the temporary supports, guarantees the stress safety, can be recycled, avoids the phenomenon that traditional concrete temporary supports are blasted and demolished after use, and reduces the waste of materials.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of municipal bridge engineering, and relates to a bridge support structure suitable for rapid construction of multiple box girders. BACKGROUND

[0002] At present, most bridge engineering projects have the case of continuous several girders being cast-in-place box girders. In order to speed up the construction progress, most projects need simultaneous construction of each girder. The important limiting factor for simultaneous construction of box girders is the prestress tension space. The prestress generally needs a tension space of about 1.2 m. As shown in the accompanying drawing, if the left box girder is constructed, if the anchoring is still grooved at the beam end, the prestress of the right box girder has no tension space and cannot be constructed. At present, the measures taken by most people are that the steel beam is not anchored at the beam end, but is anchored by grooving at the top plate of the box girder. However, the anchoring by grooving at the top plate of the box girder has many shortcomings: Figure 8 1. The use range has certain limitations. When the number of prestress pipes in the beam is large, the prestress pipes on the plate cannot be staggered, and only the prestress pipes under the plate can be used.

[0003] 2. There are a large number of grooves in the top plate of the box girder, and it is difficult to guarantee the construction quality. The top plate of the box girder is an important stressed component, and the construction quality directly affects the driving safety and driving comfort.

[0004] In addition, there is a way as shown in the accompanying drawing

[0005] which can avoid top plate tensioning: thickening the end beam, anchoring the steel beam in the end beam, appropriately moving the position inward, using an internal clamping type jack to tension, reducing the space requirement, ensuring that each girder can be constructed simultaneously, without top plate tensioning, and ensuring the construction quality. However, when the bridge pier transverse width is limited, the permanent support position cannot be moved backward, that is, the support is at the front end of the post-cast part of the groove, the support force section is reduced from the full section of the box girder to a partial section of the bracket type stress, and the schematic diagram is as shown in the accompanying drawing Figure 9 Figure 10 : Figure 12

[0006] On the cross section of the box girder, because the support only has the section near its width range to resist the force, the bracket section has the problems of shearing and punching under the working condition.

[0007] ​​To solve the safety problem under this stress state, the application provides a bridge support system, which uses temporary support to expand the stress section, shares the internal force of the box girder under the construction condition of tensioning prestress of the permanent support, and sets up large-diameter main reinforcement at the support bracket stress position, so that the bracket can meet the stress requirement and ensure the safety of the structure. After tensioning the prestress, the temporary support is removed, and the permanent support participates in the stress. This process enables the multi-unit box girder to tension the prestress at the same time, that is, to construct quickly at the same time, and avoids the problem of slotting the top plate of the box girder. The traditional concrete temporary support is blasted and removed after use, which is risky and cannot be recycled. The bridge support system provided by the application can also avoid this problem. SUMMARY

[0008] Therefore, the application provides a bridge support structure suitable for rapid construction of multi-unit box girder to solve the problem of material waste caused by the fact that the existing temporary support cannot be directly recycled after tensioning the prestress.

[0009] To achieve the above-mentioned purpose, the application provides the following technical scheme: a bridge support structure suitable for rapid construction of multi-unit box girder, comprising a pier column, a receiving beam is cast on the top of the pier column, two symmetrical box girders are arranged on the top of the receiving beam, a group of support mechanisms are arranged between the receiving beam and the box girders, the support mechanism comprises two fixed supports and a detachable support;

[0010] The detachable support comprises a middle support and two side supports arranged on both sides of the middle support, the middle support and the side supports each comprise a top plate and a bottom plate, a lifting mechanism is arranged between the top plate and the bottom plate, the lifting mechanism in the middle support comprises two and is symmetrically arranged;

[0011] The lifting mechanism comprises two guide rails, the two guide rails are fixedly connected to the bottom of the top plate and the upper surface of the bottom plate respectively, a static sliding block is fixedly connected to one end of the two guide rails, a dynamic sliding block is slidingly connected to one side of the two guide rails, an inclined brace is rotatably connected between the static sliding block and the dynamic sliding block at the staggered position, and a driving assembly for driving the dynamic sliding block to move is arranged between the top plate and the bottom plate in the middle support.

[0012] Further, the driving assembly comprises a middle block mounted on the surface of the bottom plate and an extension rod, a mounting block is slidingly connected to the middle part of the middle block, a double-extended hydraulic cylinder penetrating through one side of the mounting block is fixedly connected, two push rods are rotatably connected to the two ends of the piston rod of the double-extended hydraulic cylinder, the two ends of the extension rod are fixedly connected to one side of the two dynamic sliding blocks, and the other ends of the two push rods are rotatably connected to the two ends of the extension rod.

[0013] Further, two positioning mechanisms are arranged between the movable sliding block close to the middle block and the bottom of the middle block, the positioning mechanism comprises an extension frame and a positioning rod, the positioning rod is rotationally connected to one side of the middle block, the extension frame is fixedly connected to one side of the movable sliding block, the surface of the extension frame is provided with anti-skid teeth, the bottom of the positioning rod is rotationally connected with a clamping plate, the bottom of the clamping plate is provided with clamping teeth matched with the anti-skid teeth, one side of the positioning rod is fixedly connected with a tension spring, the other end of the tension spring is fixed to the middle block.

[0014] Further, two connecting mechanisms are arranged between the adjacent two lifting mechanisms, the connecting mechanism comprises a plurality of extension shafts, the plurality of extension shafts are fixedly connected to one side of the plurality of movable sliding blocks, the two extension shafts at the same height are detachably connected with a connecting rod, the surface of the bottom plate in the middle support and the surface of the bottom plate in the side support are respectively fixedly connected with two and one fixing sleeves, adjacent fixing sleeves are inserted with a connecting frame, the top of the fixing sleeve is inserted with a pin shaft, and the pin shaft is inserted with the connecting frame.

[0015] Further, the top of the connecting rod at the bottom is inserted with a penetrating sliding rod, and the surface of the connecting frame is provided with a sliding groove, and the sliding rod is slidingly connected with the sliding groove.

[0016] Further, one side of the middle block is fixedly connected with a handle, and the circumference of the handle is fixedly connected with a protective pad.

[0017] Further, the first mounting plate and the second mounting plate are fixedly connected with a lead core, and the circumference of the lead core is alternately sleeved with a rubber pad and a partition plate.

[0018] Further, the circumference of the rubber pad and the partition plate is sleeved with a same rubber sleeve.

[0019] The beneficial effects of the present application are as follows:

[0020] 1、The bridge support structure suitable for rapid construction of a multi-joint box girder disclosed by the present application can be lifted by the middle support and the side support, so that when the box girder is temporarily supported, the top plate can be driven to move by the double-extended hydraulic cylinder, and then the box girder is supported in cooperation with the fixed support, the stress section at the fulcrum is enlarged, and the safety of the structure under stress is ensured. After the prestress of the box girder is tensioned and the post-cast concrete is completed, the effective full section of the box girder is formed, the temporary support is lowered and withdrawn, and the box girder is subjected to stress by the permanent support. After the temporary support is removed, it can be recycled, avoiding the phenomenon that the traditional concrete temporary support is blasted and demolished after use, and reducing the waste of materials.

[0021] 2、The bridge support structure for the rapid construction of multi-box girder disclosed by the application, through the setting of the installation extension frame and the positioning rod, after the double-extended hydraulic cylinder drives the top plate to move upward, the use of the clamping plate and the extension frame prevents the top plate from moving downward when the double-extended hydraulic cylinder is damaged or loses power, improving the safety of product use.

[0022] 3、The bridge support structure for the rapid construction of multi-box girder disclosed by the application, through the setting of the installation extension frame and the positioning rod, after the double-extended hydraulic cylinder drives the top plate to move upward, the use of the clamping plate and the extension frame prevents the top plate from moving downward when the double-extended hydraulic cylinder is damaged or loses power, improving the safety of product use.

[0023] 4、The bridge support structure for the rapid construction of multi-box girder disclosed by the application, through the setting of the installation extension frame and the positioning rod, after the double-extended hydraulic cylinder drives the top plate to move upward, the use of the clamping plate and the extension frame prevents the top plate from moving downward when the double-extended hydraulic cylinder is damaged or loses power, improving the safety of product use.

[0024] 5、The bridge support structure for the rapid construction of multi-box girder disclosed by the application, through the setting of the installation extension frame and the positioning rod, after the double-extended hydraulic cylinder drives the top plate to move upward, the use of the clamping plate and the extension frame prevents the top plate from moving downward when the double-extended hydraulic cylinder is damaged or loses power, improving the safety of product use.

[0025] 6、The bridge support structure for the rapid construction of multi-box girder disclosed by the application, through the setting of the installation extension frame and the positioning rod, after the double-extended hydraulic cylinder drives the top plate to move upward, the use of the clamping plate and the extension frame prevents the top plate from moving downward when the double-extended hydraulic cylinder is damaged or loses power, improving the safety of product use.

[0026] Other advantages, objects, and features of the application will be apparent to those skilled in the art from the following specification, which is to be taken in connection with the accompanying drawings. The objects and other advantages of the application can be achieved and obtained by means of the structure and combinations particularly pointed out hereinafter. BRIEF DESCRIPTION OF DRAWINGS

[0027] In order to make the purpose, technical scheme and advantages of the application clearer, the preferred detailed description of the application will be made below in combination with the drawings, in which:

[0028] Figure 1 It is a three-dimensional structure schematic view of the bridge support structure for the rapid construction of multi-box girder.

[0029] Figure 2 The structural diagram of the bridge support structure without box girder suitable for the rapid construction of multi-unit box girder of the application;

[0030] Figure 3 The local partial structural diagram of the intermediate support and the side support of the bridge support structure suitable for the rapid construction of multi-unit box girder of the application;

[0031] Figure 4 The cross-sectional view of the intermediate support of the bridge support structure suitable for the rapid construction of multi-unit box girder of the application;

[0032] Figure 5 The installation diagram of the connecting structure of the bridge support structure suitable for the rapid construction of multi-unit box girder of the application;

[0033] Figure 6 The installation diagram of the positioning mechanism of the bridge support structure suitable for the rapid construction of multi-unit box girder of the application;

[0034] Figure 7 The cross-sectional view of the fixed support of the bridge support structure suitable for the rapid construction of multi-unit box girder of the application;

[0035] Figure 8 The diagram of the existing technology of the groove anchoring prestress tension space at the beam end;

[0036] Figure 9 The diagram of the existing technology of the simultaneous tension and construction of left and right box girders;

[0037] Figure 10 The diagram of the existing technology of the change of the stress section of the support;

[0038] Figure 11 The diagram of the existing technology of the transverse stress range of the support;

[0039] Figure 12 The diagram of the existing technology of the support bracket main steel bar.

[0040] 1, pier column; 2, bearing beam; 3, box girder; 4, middle support; 5, side support; 6, fixed support; 7, top plate; 8, bottom plate; 9, lifting mechanism; 10, connecting mechanism; 11, guide rail; 12, static slider; 13, dynamic slider; 131, extension shaft; 14, inclined strut; 15, middle block; 16, mounting block; 17, double-extended hydraulic cylinder; 18, push rod; 19, telescopic rod; 20, positioning mechanism; 21, handle; 22, fixing sleeve; 23, connecting frame; 24, pin shaft; 25, connecting rod; 26, sliding groove; 27, sliding rod; 28, extension frame; 29, anti-skid tooth; 30, positioning rod; 31, clamping plate; 32, tension spring; 33, first mounting plate; 34, second mounting plate; 35, lead core; 36, rubber pad; 37, partition plate; 38, rubber sleeve. DETAILED DESCRIPTION

[0041] The present application is described in greater detail by the following specific examples, and other advantages and effects of the present application that can be easily understood by those skilled in the art from this disclosure. The present application can also be implemented or applied by other different specific embodiments, and various modifications or changes can be made to the details in this specification based on different views and applications without departing from the spirit of the present application. It should be noted that the drawings provided in the following examples only schematically illustrate the basic concept of the present application, and the features in the following examples and embodiments can be combined with each other without conflict.

[0042] The drawings are only used for exemplary illustration, and the representation is only a schematic diagram, not a physical diagram, and should not be understood as a limitation on the present application; in order to better illustrate the embodiments of the present application, some components in the drawings may be omitted, enlarged or reduced, and do not represent the actual product size; it is understandable to those skilled in the art that some known structures and their descriptions in the drawings may be omitted.

[0043] The same or similar reference numerals in the drawings of the embodiments of the present application correspond to the same or similar components; in the description of the present application, it should be understood that if the terms "upper", "lower", "left", "right", "front", "back" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore the terms describing the positional relationship in the drawings are only used for exemplary illustration, and should not be understood as a limitation on the present application, for those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0044] As Figures 1-7The embodiment of the application discloses a bridge support structure suitable for rapid construction of a multi-unit box girder.

[0045] The detachable support comprises a middle support 4 and two side supports 5 arranged on both sides of the middle support 4, the middle support 4 and the side supports 5 are used for temporarily supporting the box girder 3, the middle support 4 and the side supports 5 each comprise a top plate 7 and a bottom plate 8, a lifting mechanism 9 is arranged between the top plate 7 and the bottom plate 8, and two lifting mechanisms 9 are symmetrically arranged in the middle support 4.

[0046] The two guide rails 11 in the lifting mechanism 9 are fixedly connected to the bottom of the top plate 7 and the upper surface of the bottom plate 8 respectively, a static sliding block 12 is fixedly connected to one end of the two guide rails 11, a dynamic sliding block 13 is slidingly connected to one side of the two guide rails 11, and a diagonal bracing rod 14 is rotationally connected between the static sliding block 12 and the dynamic sliding block 13 at a staggered position, the diagonal bracing rod 14 is used for lifting the top plate 7 when the dynamic sliding block 13 moves, and a driving assembly for driving the dynamic sliding block 13 to move is arranged between the top plate 7 and the bottom plate 8 in the middle support 4.

[0047] With reference to Figure 4 The driving assembly comprises a middle block 15 arranged on the surface of the bottom plate 8 and a telescopic rod 19, a mounting block 16 is slidingly connected to the middle of the middle block 15, a double-acting hydraulic cylinder 17 penetrating through the mounting block 16 is fixedly connected to one side of the mounting block 16, two push rods 18 are rotationally connected to the two ends of the piston rod of the double-acting hydraulic cylinder 17, the two ends of the telescopic rod 19 are fixedly connected to one side of the two dynamic sliding blocks 13, the other ends of the two push rods 18 are rotationally connected to the two ends of the telescopic rod 19, and the double-acting hydraulic cylinder 17 can drive the dynamic sliding block 13 to move through the two push rods 18 and the telescopic rod 19.

[0048] With reference to Figure 6 Two positioning mechanisms 20 are arranged between the dynamic sliding block 13 close to the bottom of the middle block 15 and the middle block 15, the positioning mechanism 20 comprises an extension frame 28 and a positioning rod 30, the positioning rod 30 is rotationally connected to one side of the middle block 15, the extension frame 28 is fixedly connected to one side of the dynamic sliding block 13, an anti-skid tooth 29 is arranged on the surface of the extension frame 28, a clamping plate 31 is rotationally connected to the bottom of the positioning rod 30, the bottom of the clamping plate 31 is provided with a clamping tooth matched with the anti-skid tooth 29, a tension spring 32 is fixedly connected to one side of the positioning rod 30, and the other end of the tension spring 32 is fixed to the middle block 15, when the dynamic sliding block 13 moves, the extension frame 28 also moves, meanwhile, the clamping plate 31 at the bottom of the positioning rod 30 keeps in contact with the anti-skid tooth 29 under the pulling of the tension spring 32, so that the double-acting hydraulic cylinder 17 is prevented from being damaged and causing the dynamic sliding block 13 to retreat during use.

[0049] With reference to Figure 5 Two connecting mechanisms 10 are arranged between every two adjacent lifting mechanisms 9, the connecting mechanism 10 comprises a plurality of extension shafts 131, the plurality of extension shafts 131 are fixedly connected to one side of the plurality of moving blocks 13 respectively, two extension shafts 131 at the same height are detachably connected with a connecting rod 25, the surface of the bottom plate 8 in the middle support 4 and the surface of the bottom plate 8 in the side support 5 are fixedly connected with two and one fixed sleeves 22 respectively, the adjacent fixed sleeves 22 are inserted with a connecting frame 23, the top of the fixed sleeve 22 is inserted with a pin shaft 24, the pin shaft 24 is inserted with the connecting frame 23 respectively, the top plate 7 in the side support 5 is moved upwards under the pushing of the connecting rod 25, the height of the top plate 7 and the fixed support 6 is measured, the top plate 7 and the fixed support 6 are kept horizontal, thereby the box girder 3 is temporarily supported.

[0050] With reference to Figure 5 The top of the connecting rod 25 at the bottom is inserted with a penetrating slide rod 27, the surface of the connecting frame 23 is provided with a sliding groove 26, the slide rod 27 is slidingly connected with the sliding groove 26, the connecting rod 25 is strengthened by moving in the sliding groove 26.

[0051] With reference to Figure 4 One side of the middle block 15 is fixedly connected with a handle 21, the circumference of the handle 21 is fixedly connected with a protective pad, the handle 21 facilitates people to move the product when not in use.

[0052] With reference to Figure 7 The fixed support 6 comprises a first mounting plate 33 and a second mounting plate 34, the first mounting plate 33 and the second mounting plate 34 are fixedly connected with a lead core 35, the circumference of the lead core 35 is alternately sleeved with a rubber pad 36 and a partition plate 37, the circumference of the rubber pad 36 and the partition plate 37 is sleeved with a same rubber sleeve 38, the rubber pad 36 and the partition plate 37 play a role of shock absorption support for the box girder 3.

[0053] The bridge support structure suitable for rapid construction of multi-connected box girder, by installing the connecting mechanism 10 between the middle support 4 and the side support 5, the side support 5 can be used at the same time with the middle support 4 under the action of the connecting rod 25, the use of driving equipment is reduced, the investment cost is reduced, and the side support 5 is convenient to move after disassembly.

[0054] The bridge support structure suitable for rapid construction of multi-connected box girder, by installing the slide rod 27 between the connecting frame 23 and the connecting rod 25, the slide rod 27 shares the pushing and pulling force of the connecting rod 25, so that the connecting rod 25 is prevented from deforming.

[0055] The bridge support structure suitable for multi-box girder rapid construction is convenient to disassemble and assemble through the connecting mechanism 10, so that people can quickly install or disassemble the detachable support during use, facilitating the decomposition and transfer of the product.

[0056] When the bridge support structure suitable for multi-box girder rapid construction is used, the fixed support 6 is installed according to the construction position, then the detachable support is installed, during installation, the middle support 4 is placed in the middle, and the side support 5 is placed on both sides, then the middle support 4 and the side support 5 are connected, during connection, the connecting rod 25 is sleeved on the extension shaft 131, and is fixed through the nut, then the connecting frame 23 is inserted into the fixed sleeve 22 and the pin shaft 24 for fixation, and finally the slide rod 27 is inserted to reinforce the connecting rod 25.

[0057] The double-extended hydraulic cylinder 17 is started, and the double-extended hydraulic cylinder 17 drives the moving block 13 to move through the two push rods 18 and the telescopic rod 19, and the inclined bracing rod 14 arranged in cross is used to lift the top plate 7, and the top plate 7 in the side support 5 moves upward under the pushing of the connecting rod 25, and the height of the top plate 7 and the fixed support 6 is measured to keep the top plate 7 and the fixed support 6 horizontal.

[0058] When the moving block 13 moves, the extension frame 28 also moves, and the positioning rod 30 keeps the clamping plate 31 at the bottom of the positioning rod 30 in contact with the anti-skid teeth 29 under the pulling of the tension spring 32, so as to prevent the double-extended hydraulic cylinder 17 from being damaged during use and causing the moving block 13 to retreat.

[0059] After the bridge support structure suitable for multi-box girder rapid construction is used, the double-extended hydraulic cylinder 17 is retracted after the positioning rod 30 is opened, and the connecting rod 25 and the connecting frame 23 are taken out in turn, so as to facilitate the reuse of the product.

[0060] However, as known by those skilled in the art, the working principle and wiring method of the double-extended hydraulic cylinder 17 are common, which belong to conventional means or common knowledge, and will not be described here, and those skilled in the art can make any selection or replacement according to their needs or convenience.

[0061] Finally, it should be pointed out that the above embodiments are only used to illustrate the technical solutions of the present application but not limit the present application, although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or replaced equivalently without departing from the purpose and scope of the technical solutions, which should be covered in the scope of claims of the present application.

Claims

1. A bridge support structure suitable for rapid construction of a multi-box girder, comprising a pier column (1), a top of the pier column (1) being cast with a receiving beam (2), a top of the receiving beam (2) being provided with two symmetrically arranged box girders (3), characterized in that, The supporting mechanism is arranged between the receiving beam (2) and the box girder (3), and comprises two fixed supports (6) and detachable supports; The detachable support comprises a middle support (4) and two side supports (5) arranged on both sides of the middle support (4), and the middle support (4) and the side support (5) each comprise a top plate (7) and a bottom plate (8), and a lifting mechanism (9) is arranged between the top plate (7) and the bottom plate (8), and the lifting mechanism (9) arranged in the middle support (4) is two and symmetrically arranged; The lifting mechanism (9) comprises two guide rails (11) fixedly connected to the bottom of the top plate (7) and the upper surface of the bottom plate (8), respectively, one end of each of the two guide rails (11) is fixedly connected with a static sliding block (12), and one side of each of the two guide rails (11) is slidably connected with a dynamic sliding block (13), and the static sliding block (12) and the dynamic sliding block (13) at the staggered positions are rotatably connected with a diagonal brace (14), and the top plate (7) and the bottom plate (8) in the middle support (4) are provided with a driving assembly for driving the dynamic sliding block (13) to move; the driving assembly comprises a middle block (15) mounted on the surface of the bottom plate (8) and an extension rod (19), the middle block (15) is slidably connected with a mounting block (16) at the middle portion, one side of the mounting block (16) is fixedly connected with a penetrating double-extended hydraulic cylinder (17), the two piston rods at the two ends of the double-extended hydraulic cylinder (17) are rotatably connected with two push rods (18), and the two ends of the extension rod (19) are fixedly connected to one side of the two dynamic sliding blocks (13), respectively, and the other ends of the two push rods (18) are rotatably connected with the two ends of the extension rod (19); Two connecting mechanisms (10) are arranged between the two adjacent lifting mechanisms (9), the connecting mechanism (10) comprises a plurality of extension shafts (131) fixedly connected to one side of the plurality of dynamic sliding blocks (13), two extension shafts (131) at the same height are detachably connected with a connecting rod (25), and the surface of the bottom plate (8) in the middle support (4) and the surface of the bottom plate (8) in the side support (5) are respectively fixedly connected with two and one fixed sleeves (22), adjacent fixed sleeves (22) are inserted with a connecting frame (23), and the top of the fixed sleeve (22) is inserted with a pin shaft (24), and the pin shaft (24) is inserted with the connecting frame (23), respectively.

2. The bridge support structure according to claim 1, wherein Two positioning mechanisms (20) are arranged between the dynamic sliding block (13) close to the middle block (15) and the middle block (15) and located at the bottom, the positioning mechanism (20) comprises an extension frame (28) and a positioning rod (30), the positioning rod (30) is rotationally connected to one side of the middle block (15), the extension frame (28) is fixedly connected to one side of the dynamic sliding block (13), the surface of the extension frame (28) is provided with anti-skid teeth (29), the bottom of the positioning rod (30) is rotationally connected with a clamping plate (31), the bottom of the clamping plate (31) is provided with clamping teeth matched with the anti-skid teeth (29), one side of the positioning rod (30) is fixedly connected with a tension spring (32), the other end of the tension spring (32) is fixed with the middle block (15).

3. The bridge support structure according to claim 1, wherein The top of the connecting rod (25) located at the bottom is inserted with a penetrating sliding rod (27), the surface of the connecting frame (23) is provided with a sliding groove (26), and the sliding rod (27) is slidably connected with the sliding groove (26).

4. The bridge support structure according to any one of claims 1 to 3, wherein One side of the middle block (15) is fixedly connected with a handle (21), and the circumference of the handle (21) is fixedly connected with a protective pad.

5. The bridge support structure according to claim 1, wherein The fixed support (6) comprises a first mounting plate (33) and a second mounting plate (34), the first mounting plate (33) and the second mounting plate (34) are fixedly connected with a lead core (35), and the circumference of the lead core (35) is alternately sleeved with a rubber pad (36) and a partition plate (37).

6. The bridge support structure according to claim 5, wherein The circumference of the rubber pad (36) and the partition plate (37) is sleeved with a same rubber sleeve (38).

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