Temporary unloading support for bridge

Abstract

The invention provides a temporary unloading support for a bridge, and relates to the technical field of bridge construction, the temporary unloading support comprises a concrete foundation block, a support frame main body, a support beam and an unloading adjusting assembly; the unloading adjusting assembly is arranged above the longitudinal beam, the unloading adjusting assembly comprises an upper support, a lower support and side supports located on the two sides of the upper support and the two sides of the lower support, contact slopes which are attached to each other are arranged between the upper support and the side supports, and contact slopes which are attached to each other are also arranged between the lower support and the side supports; an adjusting screw rod is connected between the side supports on the two sides, and the adjusting screw rod is used for adjusting the distance between the side supports on the two sides so as to adjust the distance between the upper support and the lower support under the action of the contact slopes; a locking assembly is further included. The device can meet the arrangement requirements of different bridge structures, and the overall stability and bearing capacity are improved; and reliable locking is achieved after height adjustment, relative displacement after loading is reduced, and safety and stability of unloading operation are improved.

Description

Technical Field

[0001] This invention relates to the field of bridge construction technology, and more specifically, to a temporary bridge dismantling support. Background Technology

[0002] During bridge construction and the maintenance, reinforcement, or bearing replacement of existing bridges, especially in the installation of precast cap beams, it is often necessary to temporarily support and unload the bridge superstructure or components to be installed to achieve temporary load transfer or phased release. For this purpose, temporary unloading supports are typically installed under the bridge or near the piers to bear the self-weight of the precast cap beams and superstructure, as well as construction loads, and to reliably transfer the load to the foundation.

[0003] With the increase in bridge span and load capacity, and the rising precision requirements for precast cap beam installation in prefabricated construction, higher demands are placed on the overall stability, modularity, load-bearing capacity, and spatial stiffness of temporary unloading supports. Therefore, it is necessary to provide a structurally sound support structure suitable for precast cap beam installation and temporary unloading operations to meet the needs of engineering construction safety and applicability. Summary of the Invention

[0004] The purpose of this invention is to provide a temporary bridge unloading support that can adapt to different bridge structure layout requirements, improve overall stability and load-bearing capacity; and achieve reliable locking after height adjustment, reduce relative displacement after loading, and improve the safety and stability of unloading operations.

[0005] This invention is achieved through the following technical solution: A temporary bridge dismantling support includes a concrete foundation block, a support frame body mounted on the concrete foundation block, a support beam mounted on the top of the support frame body, and at least one dismantling adjustment component mounted on the support beam; wherein: The main body of the support frame includes vertical columns and horizontal connecting components and diagonal bracing components connecting the vertical columns; The support beam includes a crossbeam disposed on the top of the support frame body and longitudinal beams intersecting the crossbeam; The unloading adjustment assembly is disposed above the longitudinal beam. The unloading adjustment assembly includes an upper support, a lower support, and side supports located on both sides of the upper support and the lower support. The upper support and the side supports have mutually fitting contact slopes, and the lower support and the side supports also have mutually fitting contact slopes. An adjusting screw is connected between the two side supports. The adjusting screw is used to adjust the distance between the two side supports, so as to adjust the distance between the upper support and the lower support under the action of the contact inclined surface. Locking components for locking and positioning their relative positions are provided at the contact slope between the upper support and the side support, and at the contact slope between the lower support and the side support.

[0006] Preferably, the locking assembly includes a sliding seat, a locking block, and a driving member. Each side support has a sliding groove along its length on the contact inclined surfaces on both its upper and lower sides. The sliding seat is slidably disposed within the sliding groove, and the locking block is slidably inserted into the sliding seat. The upper and lower supports have positioning grooves corresponding to the locking block on their contact inclined surfaces. The locking block is slidably disposed within the positioning groove. The positioning groove is an elongated groove, and its length direction is offset from the length direction of the side support. A toothed groove is formed along the length direction within the positioning groove. The locking block has locking teeth that mesh with the toothed groove. The driving member is used to drive the locking block closer to or away from the toothed groove.

[0007] Preferably, each of the side supports has a pair of sliding grooves on the contact inclined surfaces on both the upper and lower sides, and a pair of positioning grooves are also provided accordingly, with the pair of positioning grooves arranged in a figure-eight shape.

[0008] Preferably, the driving component includes an electromagnet, and the card block is provided with a first magnetic component that attracts or repels the electromagnet.

[0009] Preferably, the locking component further includes a locking block, and a mounting groove is provided on one side of the locking tooth on the locking block. The locking block is slidably disposed in the mounting groove. The locking block is provided with locking teeth corresponding to the locking teeth. The locking block is configured to be able to approach or move away from the tooth groove under the drive of the driving member and provide rotational torque so that the locking teeth rotate and engage with the tooth groove.

[0010] Preferably, the locking block is provided with a second magnetic element, which can be attracted or repelled by the electromagnet.

[0011] Preferably, the inner wall of the mounting groove is provided with a first sliding groove and a second sliding groove, which are interconnected. The first sliding groove is parallel to the axial direction of the mounting groove, and the second sliding groove is arc-shaped. A ball is fixedly provided on the side wall of the locking block. The ball can slide in the first sliding groove and the second sliding groove. The locking block is initially located in the mounting groove. As the ball moves from the first sliding groove into the second sliding groove, the locking block gradually extends out of the mounting groove and provides rotational torque under the guidance of the second sliding groove.

[0012] Preferably, a limiting block is provided on the sliding seat, and a limiting groove is formed on the side wall of the sliding groove along the length direction, and the limiting block is slidably connected in the limiting groove.

[0013] Preferably, both the upper support and the lower support are provided with ear plates, and a positioning screw is passed between the upper and lower ear plates, with a positioning nut threaded on the positioning screw.

[0014] Preferably, both the crossbeam and the longitudinal beam are double-section steel structures.

[0015] The technical solution of the present invention has at least the following advantages and beneficial effects: By setting up a support frame main body on the concrete foundation block, and installing a support beam structure composed of crossbeams and longitudinal beams on top of the support frame main body, the load transfer path is made so that the load transfer path passes from top to bottom through the unloading adjustment components, longitudinal beams, crossbeams, support frame main body, and finally to the concrete foundation block, ensuring continuous and clear force transfer. The transverse connecting components and diagonal bracing components together form a spatial support system, improving the overall stability and spatial stiffness of the support frame main body. The longitudinal beams are intersecting above the crossbeams, allowing for more flexible arrangement of the unloading adjustment components, enabling them to be rationally arranged according to the stress location of the bridge structure, enhancing the structure's adaptability and modular combination capabilities, thereby meeting the requirements for the overall stability and load-bearing capacity of temporary unloading supports during the construction of bridges with different spans and load levels.

[0016] The unloading adjustment assembly uses mutually fitting inclined contact surfaces between the upper, lower, and side supports, and adjusts the distance between the two side supports using adjusting screws. This creates a relative sliding fit between the inclined surfaces, allowing for precise adjustment of the distance between the upper and lower supports. Compared to a simple vertical lifting structure, this structure provides a clear force decomposition on the inclined surfaces and a stable force transmission path. Furthermore, the locking components at the contact inclined surfaces ensure a reliable positioning and locking relationship for each support after adjustment, preventing relative displacement under load and improving stability and safety during the unloading process. This effectively solves the problem of existing temporary unloading supports struggling to balance height adjustment stability and positioning reliability. Attached Figure Description

[0017] Figure 1 This invention aims to demonstrate an overall structural schematic diagram of a temporary bridge dismantling support; Figure 2 for Figure 1 Enlarged view of section A; Figure 3 This invention aims to illustrate the structural schematic diagram of the unloading adjustment assembly; Figure 4 This invention aims to show an exploded view of the unloading adjustment assembly; Figure 5 for Figure 4 Enlarged view of section B; Figure 6This is a schematic diagram illustrating the structure of the side support and locking assembly of the present invention; Figure 7 This invention is intended to illustrate a cross-sectional view of the locking component; Figure 8 This invention aims to show an exploded view of the locking component; Reference numerals: 100, concrete foundation block; 200, main support frame; 210, column; 220, transverse connecting component; 230, diagonal bracing component; 300, support beam; 310, crossbeam; 320, longitudinal beam; 400, unloading adjustment assembly; 410, upper support; 420, lower support; 421, positioning groove; 4211, toothed groove; 422, ear plate; 430, side support; 431, sliding groove; 4311, limiting groove; 440a, contact slope; 4 50. Adjusting screw; 451. Adjusting nut; 500. Locking assembly; 510. Sliding seat; 511. Limiting block; 520. Locking block; 5201. Mounting groove; 52011. First sliding groove; 52012. Second sliding groove; 521. Locking tooth; 522. First magnetic component; 530. Driving component; 531. Electromagnet; 540. Locking block; 541. Locking tooth; 542. Second magnetic component; 543. Ball; 600. Positioning screw; 610. Positioning nut. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0019] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0020] The following is for reference Figures 1-8 As shown in the figure, and further explained with reference to specific embodiments, this embodiment provides a temporary bridge unloading support, including a concrete foundation block 100, a support frame body 200 provided on the concrete foundation block 100, a support beam 300 provided on the top of the support frame body 200, and at least one unloading adjustment component 400 provided on the support beam 300.

[0021] The concrete foundation block 100 can be a cast-in-place reinforced concrete structure or a precast concrete block assembly structure. In different implementations, its bottom can be equipped with a crushed stone cushion layer, a steel plate cushion layer, or adjustable pads, depending on the bearing capacity of the foundation, to improve the stress conditions of the foundation and enhance the overall anti-settlement performance. The planar dimensions and thickness of the concrete foundation block 100 can be determined according to the design load. If necessary, steel mesh or reinforcing bars can be configured inside to improve crack resistance and overall rigidity.

[0022] The support frame body 200 includes vertical columns 210 and transverse connecting members 220 and diagonal bracing members 230 connected between the vertical columns 210. The vertical columns 210 can be made of seamless steel pipes, welded steel pipes, or H-beams, I-beams, and other steel components. In a preferred embodiment, the vertical columns 210 are thick-walled steel pipes to improve axial load-bearing capacity and buckling resistance.

[0023] The lateral connecting members 220 can be layered along the height direction, with each layer forming a closed frame structure, thereby enhancing the overall integrity of the support frame main body 200. The diagonal bracing members 230 are arranged intersectingly between adjacent vertical columns 210, and can adopt single or double diagonal bracing structures to form a spatial truss system, improving the stability of the support frame main body 200 under lateral loads and construction disturbances. The components can be connected by welding, high-strength bolts, or plug-in joints to meet the requirements of rapid on-site assembly and disassembly, achieving modular combination.

[0024] The support beam 300 includes a crossbeam 310 mounted on the top of the support frame body 200 and longitudinal beams 320 intersecting the crossbeam 310. Both the crossbeam 310 and the longitudinal beams 320 are double-section steel structures. The double-section steel structures can be connected by spaced connecting plates and high-strength bolts, or they can be fully welded to form an integral structure, thereby improving bending stiffness and torsional resistance.

[0025] The crossbeam 310 can be arranged transversely along the bridge, and the longitudinal beam 320 can be arranged longitudinally along the bridge. The longitudinal beam 320 is intersecting above the crossbeam 310, allowing the unloading adjustment assembly 400 to be flexibly arranged according to the stress position of the bridge. In different embodiments, stiffening plates or limiting plates can be provided between the crossbeam 310 and the longitudinal beam 320 to enhance the joint stiffness and limit relative slippage. Spacer plates can also be provided between the double-section steel sections to ensure uniform stress distribution.

[0026] The unloading adjustment assembly 400 is disposed above the longitudinal beam 320. The unloading adjustment assembly 400 includes an upper support 410, a lower support 420, and side supports 430 located on both sides of the upper support 410 and the lower support 420. The upper support 410 and the side supports 430 have mutually fitting contact inclined surfaces 440a, and the lower support 420 and the side supports 430 also have mutually fitting contact inclined surfaces 440a. The upper support 410, the lower support 420, and the side supports 430 can be an isosceles trapezoid or triangular structure, with their two inclined surfaces forming the aforementioned contact inclined surfaces 440a. The contact inclined surfaces 440a can be integrally machined planar inclined surfaces or formed by welding inclined plates. The inclination angle of the inclined surfaces can be designed according to the adjustment stroke and stress requirements to improve load-bearing stability while ensuring adjustment accuracy. The upper support 410, lower support 420, and side support 430 can all be made of high-strength structural steel, such as Q345 or higher strength grade steel, to meet the compressive strength requirements under heavy loads. In different embodiments, a wear-resistant layer or surface hardening treatment can be provided between the contact inclined surfaces 440a to improve wear resistance and service life.

[0027] An adjusting screw 450 is connected between the two side supports 430. The adjusting screw 450 is used to adjust the distance between the two side supports 430, so as to adjust the distance between the upper support 410 and the lower support 420 under the action of the contact inclined surface 440a. The adjusting screw 450 can adopt a double-thread structure or a normal thread structure, and its two ends are threaded with adjusting nuts 451. The adjusting nuts 451 abut against the outer wall of the two side supports 430. By rotating the adjusting screw 450 or the adjusting nuts 451, the two side supports 430 move laterally relative to each other, thereby causing the contact inclined surface 440a to slide relative to each other, so as to achieve fine adjustment of the distance between the upper support 410 and the lower support 420.

[0028] In alternative embodiments, the adjusting screw 450 can be equipped with a handwheel, an electric drive mechanism, or a hydraulic drive mechanism to meet adjustment needs under different construction conditions. After adjustment, the adjusting screw 450 can be limited by a lock nut or a stop to prevent loosening under vibration or load changes.

[0029] Locking components 500 are provided at the contact slope 440a between the upper support 410 and the side support 430, and at the contact slope 440a between the lower support 420 and the side support 430, for locking and positioning their relative positions, so as to fix the relative positions between each support after adjustment is completed, and form a stable force transmission relationship.

[0030] Reference Figures 2-8As shown, the locking assembly 500 includes a sliding base 510, a locking block 520, and a driving member 530. Each side support 430 has a sliding groove 431 along its length on the contact slope 440a on both its upper and lower sides. The sliding base 510 is slidably disposed within the sliding groove 431, and the locking block 520 is slidably inserted into the sliding base 510. Positioning grooves 421 are provided on the contact slope 440a of the upper support 410 and the lower support 420 corresponding to the portion of the locking block 520. The locking block 520 is slidably disposed within the positioning grooves 421.

[0031] The positioning groove 421 is an elongated groove, and its length direction is offset from that of the side support 430. A toothed groove 4211 is formed within the positioning groove 421 along its length direction. The locking block 520 is provided with locking teeth 521 that mesh with the toothed groove 4211. Through the meshing between the locking teeth 521 and the toothed groove 4211, a reliable positioning relationship can be formed after adjustment. In different embodiments, the toothed groove 4211 can be an equidistant tooth structure or an involute tooth structure to improve meshing stability.

[0032] Reference Figure 3 and Figure 4 As shown, each side support 430 has a pair of sliding grooves 431 on the contact slopes 440a on both the upper and lower sides, and a corresponding pair of positioning grooves 421 are also provided. The pair of positioning grooves 421 are arranged in a V-shape. With the above structure, after the pair of sliding seats 510 are fixed, the upper support 410 and the lower support 420 can achieve stable positioning under the slope cooperation relationship; at the same time, the V-shaped positioning grooves 421 can form a cross-limiting effect, further suppressing the slight slippage of the upper support 410 and the lower support 420 in the slope direction, improving the overall anti-slip capability and load stability. This structure not only improves the locking reliability, but also disperses local stress and reduces the phenomenon of single-point stress concentration.

[0033] Reference Figure 5 and Figure 6 As shown, the driving component 530 includes an electromagnet 531, and the locking block 520 is provided with a first magnetic component 522 that attracts or repels the electromagnet 531. The first magnetic component 522 can be a magnet plate or an electromagnet 531 structure. The extension or retraction of the locking block 520 is controlled by energization, so that the locking teeth 521 and the tooth groove 4211 are in an engaged or disengaged state.

[0034] In alternative embodiments, the drive component 530 may also employ a spring-loaded structure, achieving locking through mechanical release; or it may adopt a hydraulic push rod structure, a mechanical pull rod structure, or other forms to adapt to different construction environments or power supply conditions. After the locking teeth 521 engage with the tooth groove 4211, a rigid connection is formed between the locking block 520 and the sliding seat 510, preventing the sliding seat 510 from continuing to move within the sliding groove 431, thereby limiting the displacement of the side support 430 in the inclined plane direction, and further limiting the relative positions of the upper support 410 and the lower support 420, forming a stable locking state.

[0035] Reference Figures 6-8 As shown, the locking assembly 500 also includes a locking block 540. A mounting groove 5201 is provided on one side of the locking teeth 521 on the locking block 520. The locking block 540 is slidably disposed within the mounting groove 5201. The locking block 540 is provided with locking teeth 541 corresponding to the locking teeth 521. In specific configurations, the locking teeth 541 can be slightly smaller than the tooth groove 4211, allowing for a certain rotational engagement space when entering the tooth groove 4211, thus creating a wedging effect during rotation. Under the action of the driving component 530, the locking block 540 can move closer to or further away from the tooth groove 4211 and rotate along a preset motion trajectory. This allows the locking teeth 541 to further form a composite locking structure with the tooth groove 4211 on top of the engagement with the locking teeth 521, improving locking reliability and vibration resistance. This composite locking method can remain stable under long-term pressure or repeated loading conditions and is not prone to loosening.

[0036] Reference Figure 7 and Figure 8 As shown, a second magnetic element 542 is provided on the locking block 540. The second magnetic element 542 can be attracted or repelled by the electromagnet 531, thereby forming a linkage control with the first magnetic element 522 to realize the synchronous or separate action of the locking block 520 and the locking block 540. In different embodiments, the second magnetic element 542 can also be a magnet plate or an electromagnet 531 structure, or it can be replaced by a mechanical linkage to meet the requirements of different control methods.

[0037] Reference Figure 8 As shown, to control the movement of the locking block 540, the inner wall of the mounting groove 5201 is provided with a first sliding groove 52011 and a second sliding groove 52012, which are interconnected. The first sliding groove 52011 is parallel to the axial direction of the mounting groove 5201, and the second sliding groove 52012 is arc-shaped. A ball 543 is fixedly provided on the side wall of the locking block 540, and the ball 543 can slide within the first sliding groove 52011 and the second sliding groove 52012.

[0038] In its initial state, the locking block 540 is located within the mounting groove 5201. When the ball 543 moves along the first sliding groove 52011, the locking block 540 first undergoes a linear displacement along the axial direction, causing the locking teeth 521 to preferentially engage with the tooth groove 4211. Subsequently, the ball 543 enters the arc-shaped second sliding groove 52012. Guided by the arc-shaped trajectory, the locking block 540 rotates and gradually extends out of the mounting groove 5201, causing the locking teeth 541 to rotate and engage within the tooth groove 4211. Through the aforementioned staged motion structure, a sequence of engagement followed by locking can be formed, avoiding misalignment and interference between the locking teeth 541 and the tooth groove 4211, thus improving docking accuracy and locking success rate.

[0039] The drive unit 530 can simultaneously drive the movement of the locking block 520 and the locking block 540, achieving centralized control. The presence of the first slide groove 52011 provides axial pre-movement space for the locking block 540, allowing the locking teeth 521 and the tooth groove 4211 to first complete basic engagement, and then the locking teeth 541 to perform enhanced locking, thereby forming a sequential action structure with time intervals, improving the overall locking stability and reliability.

[0040] Reference Figure 5 As shown, a limiting block 511 is provided on the sliding seat 510, and a limiting groove 4311 is formed on the side wall of the sliding groove 431 along its length. The limiting block 511 is slidably connected within the limiting groove 4311 to limit the movement range of the sliding seat 510, prevent the sliding seat 510 from falling out of the sliding groove 431, and enhance structural safety. The cross-sections of the limiting block 511 and the limiting groove 4311 can be square or other shapes.

[0041] Reference Figure 3 As shown, both the upper support 410 and the lower support 420 are provided with ear plates 422, and a positioning screw 600 passes between the upper and lower ear plates 422. The positioning screw 600 is vertically arranged, and a positioning nut 610 is threaded onto the positioning screw 600. Through the cooperation of the positioning screw 600 and the positioning nut 610, the relative position between the upper support 410 and the lower support 420 can be further restricted after the entire unloading adjustment assembly 400 is installed, forming a multi-limiting structure and improving safety and reliability under heavy loads.

[0042] Through the above structural design, the temporary bridge unloading support in this embodiment achieves fine adjustment and reliable locking of the unloading adjustment component 400 while ensuring overall load-bearing capacity and spatial stability. It is suitable for temporary unloading operations in bridge construction with different spans and load levels, and has strong adaptability and safety.

[0043] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application.

Claims

1. A temporary bridge dismantling support, characterized in that, Includes a concrete foundation block (100), on which a support frame body (200) is provided, and a support beam (300) is provided on the top of the support frame body (200), and at least one unloading adjustment component (400) is configured on the support beam (300); wherein: The main body (200) of the support frame includes vertical columns (210) and horizontal connecting members (220) and diagonal bracing members (230) connected between the vertical columns (210). The support beam (300) includes a crossbeam (310) disposed on the top of the support frame body (200) and longitudinal beams (320) intersecting the crossbeam (310). The unloading adjustment assembly (400) is disposed above the longitudinal beam (320). The unloading adjustment assembly (400) includes an upper support (410), a lower support (420), and side supports (430) located on both sides of the upper support (410) and the lower support (420). The upper support (410) and the side supports (430) have mutually fitting contact slopes (440a), and the lower support (420) and the side supports (430) also have mutually fitting contact slopes (440a). An adjusting screw (450) is connected between the two side supports (430). The adjusting screw (450) is used to adjust the distance between the two side supports (430) so as to adjust the distance between the upper support (410) and the lower support (420) under the action of the contact inclined surface (440a). Locking components (500) for locking and positioning their relative positions are provided at the contact slope (440a) between the upper support (410) and the side support (430) and at the contact slope (440a) between the lower support (420) and the side support (430).

2. The temporary bridge dismantling support according to claim 1, characterized in that, The locking assembly (500) includes a sliding seat (510), a locking block (520), and a driving member (530). Each side support (430) has a sliding groove (431) along its length on the contact slope (440a) on both its upper and lower sides. The sliding seat (510) is slidably disposed within the sliding groove (431), and the locking block (520) is slidably inserted into the sliding seat (510). The upper support (410) and the lower support (420) have corresponding positions on their contact slopes (440a) corresponding to the locking block (520). The positioning groove (421) is provided, and the locking block (520) is slidably disposed in the positioning groove (421). The positioning groove (421) is a long groove, and the length direction of the positioning groove (421) is offset from the length direction of the side support (430). The positioning groove (421) is provided with a toothed groove (4211) along the length direction. The locking block (520) is provided with locking teeth (521) that mesh with the toothed groove (4211). The driving member (530) is used to drive the locking block (520) to move closer to or away from the toothed groove (4211).

3. The temporary bridge dismantling support according to claim 2, characterized in that, Each of the side supports (430) has a pair of sliding grooves (431) on the contact slope (440a) on both the upper and lower sides, and a pair of positioning grooves (421) are also provided accordingly. The pair of positioning grooves (421) are arranged in a figure-eight shape.

4. The temporary bridge dismantling support according to claim 2, characterized in that, The driving component (530) includes an electromagnet (531), and the card block (520) is provided with a first magnetic component (522) that attracts or repels the electromagnet (531).

5. The temporary bridge dismantling support according to claim 4, characterized in that, The locking assembly (500) further includes a locking block (540). The locking block (520) has an installation groove (5201) on one side of the locking tooth (521). The locking block (540) is slidably disposed in the installation groove (5201). The locking block (540) is provided with locking teeth (541) corresponding to the locking tooth (521). The locking block (540) is configured to be able to approach or move away from the tooth groove (4211) under the drive of the driving member (530) and provide rotational torque so that the locking teeth (541) are rotated and engaged on the tooth groove (4211).

6. The temporary bridge dismantling support according to claim 5, characterized in that, The locking block (540) is provided with a second magnetic element (542), which can be attracted or repelled by the electromagnet (531).

7. The temporary bridge dismantling support according to claim 6, characterized in that, The inner wall of the mounting groove (5201) is provided with a first sliding groove (52011) and a second sliding groove (52012). The first sliding groove (52011) and the second sliding groove (52012) are interconnected. The first sliding groove (52011) is parallel to the axial direction of the mounting groove (5201). The second sliding groove (52012) is arc-shaped. A ball (543) is fixedly provided on the side wall of the locking block (540). 3) It can slide within the first slide groove (52011) and the second slide groove (52012). The locking block (540) is initially located within the mounting groove (5201). As the ball (543) moves from the first slide groove (52011) into the second slide groove (52012), the locking block (540) gradually extends out of the mounting groove (5201) and provides rotational torque under the guidance of the second slide groove (52012).

8. The temporary bridge dismantling support according to claim 2, characterized in that, A limiting block (511) is provided on the sliding seat (510), and a limiting groove (4311) is opened on the side wall of the sliding groove (431) along the length direction. The limiting block (511) is slidably connected in the limiting groove (4311).

9. The temporary bridge dismantling support according to claim 1, characterized in that, Both the upper support (410) and the lower support (420) are provided with ear plates (422), and a positioning screw (600) is passed between the upper and lower ear plates (422). A positioning nut (610) is threaded on the positioning screw (600).

10. The temporary bridge dismantling support according to claim 1, characterized in that, Both the crossbeam (310) and the longitudinal beam (320) are double-section steel structures.

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