Jacking device and beam plate jacking construction method

Abstract

The invention relates to a bridge construction technology, in particular to a jacking device and a beam plate jacking construction method. The device comprises a limiting assembly and a temporary supporting assembly, the limiting assembly comprises an assembly main body, the assembly main body comprises a stabilizing seat, an inclined supporting mechanism is arranged above the stabilizing seat, and the inclined supporting mechanism comprises a first inclined supporting plate and a second inclined supporting plate; a limiting mechanism is arranged at the stabilizing seat; the temporary supporting assembly comprises a supporting assembly body, the supporting assembly body comprises a supporting seat, and a rotating ball head is arranged at the top of the supporting seat. The method comprises the steps of S1, construction preparation; s2, a limiting assembly is installed; s3, jacking and temporary supporting assemblies are installed; s4, cooperative jacking and dynamic limiting are carried out; s5, carrying out load transfer and cycle operation; s6, completion processing; through combination of the method and the device, the construction efficiency is further improved, and the construction period is shortened.

Description

Technical Field

[0001] This invention relates to bridge construction technology, and more specifically, to a jacking device and a method for jacking up bridge beams and slabs. Background Technology

[0002] In the reconstruction and expansion of highway and railway bridges, or in the repair and reinforcement of old bridges, the overall bridge jacking technology is widely used due to its minimal impact on traffic and its environmental and economical nature. This technology uses hydraulic jacks to lift the entire superstructure of the bridge beams, followed by raising the piers or replacing the bearings to restore or improve the bridge's functionality.

[0003] However, the core difficulties and risks of this technology lie in stability control during the jacking process. Existing jacking construction methods have shortcomings in the following two key aspects. Firstly, regarding lateral restraint, traditional methods often involve welding rigid blocks to the sides of the abutment or cap beam, or driving in steel wedges for constraint. This approach has several drawbacks: Firstly, its restraint capability is passive and limited, unable to dynamically adjust and actively tighten according to the complex displacements that may occur in the beam during the lifting process. Once a deviation occurs, it is difficult to effectively correct it. Secondly, welding or hammering construction is not only inefficient, but also causes thermal or impact damage to the original abutment concrete structure, affecting the structural durability.

[0004] Secondly, regarding temporary supports, existing processes generally use standard steel blocks or concrete blocks stacked in stages. This method has some drawbacks: First, the adjustment of the support height depends on the workers' selection, combination, and trial installation of blocks of different thicknesses on site. This process is not only time-consuming and labor-intensive, but also has poor matching between the lifting stroke and the support height, making it difficult to achieve precise staged lifting control. Second, the support system has poor overall integrity, and there is a lack of reliable connection between the blocks in each layer, resulting in insufficient stability when subjected to dynamic or eccentric loads. Summary of the Invention

[0005] This invention provides a jacking device and a beam and slab jacking construction method, which can overcome some or all the defects of the prior art.

[0006] According to a lifting device of the present invention, it includes: a limiting component and a temporary support component. The limiting component includes a component body, the component body includes a fixed seat for connecting with a bridge base, and a diagonal bracing mechanism is provided above the fixed seat. The diagonal bracing mechanism includes a first diagonal bracing plate for supporting the bridge and a second diagonal bracing plate for supporting the first diagonal bracing plate. A plurality of limiting mechanisms are provided at the fixed seat at intervals along the length direction of the fixed seat, and the limiting mechanisms are used to fix the first diagonal bracing plate and the second diagonal bracing plate. The temporary support assembly includes a support assembly body disposed between the beam and the pier. The support assembly body includes multiple support seats spaced apart along the height direction of the pier. The top of each support seat is provided with a rotating ball head for adjusting the support angle. The height of the multiple connected support seats gradually decreases from bottom to top. Adjacent support seats are fixedly connected.

[0007] With this invention, before jacking up the beam, construction workers set jacking points and limiting points on the bridge base below the beam to be jacked. The jacking points are located directly below the original supports or web of the main beam, and the limiting points are located at both ends of the bridge base. After the limiting points are determined, multiple through holes are drilled at both ends of the bridge base sidewalls using an electric drill. These through holes are spaced apart along the length of the bridge base. After the through holes are drilled, the construction workers first place the fixing seat on the main body of the component at the through hole position, aligning the through hole on the bridge base with the fifth through hole on the connecting plate. Then, bolts are used to connect the fixing seat and the bridge base through the through holes. After the seat is fixed, the construction workers connect the diagonal bracing mechanism to the fixed seat. First, one end of the first diagonal bracing plate is extended towards the sliding plate. Then, the second threaded rod passes through the third through hole on the sliding plate and the fourth through hole on the first diagonal bracing plate. Then, the second nut is screwed on both ends of the second threaded rod to rotatably connect the first diagonal bracing plate to the sliding plate. Then, the second diagonal bracing plate and the first diagonal bracing plate are rotatably connected in the same way through the first threaded rod and the first nut. Then, the first diagonal bracing plate is adjusted to form a tight contact with the bottom or side of the beam plate. Finally, the lower end of the second diagonal bracing plate is fixedly connected to the sliding plate through the third threaded rod and the third nut, thereby supporting the first diagonal bracing plate. After the diagonal bracing mechanism is completed, jacks are installed at the jacking points, and temporary support components are assembled simultaneously on one side of the jacks. When installing the temporary support components, support seats of different heights are first stacked according to the height between the bridge base and the beam, until the support seats can reach the beam position. When connecting the support seats, bolts are passed through the bolt holes on the upper first baffle of the lower support seat and the bolt holes on the lower second baffle of the upper support seat to fix two adjacent support seats together. Then, the support seats are connected and stacked in the same way. After the support seats are stacked to the required height, the construction workers adjust the rotating ball head at the top to make it fully fit with the bottom surface of the beam to form auxiliary support. After the limiting components and temporary support components are installed, the jacks are used for staged lifting, lifting a certain distance each time, with the lifting distance gradually decreasing each time. After each stage of lifting, the jacks stop lifting. At this time, the construction workers loosen the connecting bolts between the fixed seat and the bridge base, adjust the position of the fixed seat, and then reconnect the fixed seat and the bridge base with bolts. After the fixed seat is adjusted, the connection position of the first and second diagonal braces with the fixed seat is adjusted so that the first diagonal brace makes tight contact with the bottom or side surface of the beam. After the limiting components are adjusted, the rotating ball head on the top of the support seat is removed. Support seats of appropriate height are stacked, and the rotating ball head is placed on top of the support seats. The rotating ball head on top is adjusted to make it fully fit with the bottom surface of the beam. Then the jacks are lowered to start the next cycle of lifting. The above operations are repeated until the beam reaches the expected height. Then the jacks, temporary support components, and limiting components are removed.

[0008] In summary, compared with traditional structures, the limiting components allow construction workers to continuously adjust their position and support angle according to the lifting process of the beam, enabling them to follow the beam's upward trajectory and change their support state. This prevents the beam from deviating during the lifting process, which is difficult to correct effectively. At the same time, the limiting components do not require welding or steel wedges for fixing, thus causing less damage to the original bridge abutment concrete structure.

[0009] Compared to existing technologies, the temporary support assembly features a rotating ball head at the top that automatically adjusts its angle, ensuring a tight fit across the entire beam regardless of its surface level. This distributes the concentrated force of the jacks evenly as a surface load, avoiding the risk of localized concrete crushing caused by point or line contact with traditional rigid blocks. The design, where all support seats have the same width but progressively decreasing height, eliminates the need for complex measurements and calculations after each jacking operation, standardizing the construction process and speeding up the process. The jacking stroke and final posture are controllable at each step, reducing the risk of over-jacking or insecure support due to measurement or misjudgment. The fixed connection between adjacent support seats solves the problems of poor overall integrity and low stiffness in traditional block stacking systems. This fixed connection ensures the support system can effectively resist bending moments caused by horizontal forces or eccentric loads, resulting in greater stability.

[0010] Preferably, the first and second inclined plates have U-shaped cross-sections. The second inclined plate has a first through hole at both ends of its sidewalls, and the first inclined plate has a second through hole at its sidewalls corresponding to the first through hole. The first inclined plate has a first threaded rod that is arranged along the width of the first inclined plate and passes through the first and second through holes. Both ends of the first threaded rod have a first nut that is threadedly engaged with the first threaded rod.

[0011] In this invention, the first and second inclined bracing plates are made of channel steel, and the first threaded rod and the first nut cooperate to connect the second and first inclined bracing plates, so that the second and first inclined bracing plates can rotate at the connection point. This allows construction personnel to adjust the support angle of the first inclined bracing plate by adjusting the rotation angle of the second and first inclined bracing plates, so that the first inclined bracing plate can fit tightly with the bottom or side surface of the beam or slab, and can adapt to the bottom or side surface of the beam or slab with different inclinations.

[0012] Preferably, the fixed base includes a sliding plate with a U-shaped cross-section, and the limiting mechanism includes a plurality of third through holes disposed on the side walls of both sides of the sliding plate, the plurality of third through holes being spaced apart along the length direction of the sliding plate; a fourth through hole is provided on the side wall of the first inclined support plate near the sliding plate, corresponding to the third through hole; a second threaded rod is provided on the end of the first inclined support plate near the fourth through hole, which is disposed along the width direction of the first inclined support plate and passes through the fourth through hole and the third through hole at both ends; a second nut is provided at both ends of the second threaded rod, which is threadedly engaged with the second threaded rod. The second inclined plate is provided with a third threaded rod at one end near the sliding plate, which is arranged along the width direction of the second inclined plate. Both ends of the third threaded rod pass through the first through hole and the third through hole, and both ends of the third threaded rod are provided with a third nut that is threadedly engaged with the third threaded rod.

[0013] This invention facilitates construction workers in connecting the first inclined plate and the sliding plate, as well as the second inclined plate and the sliding plate, through the cooperation of the second threaded rod and the second nut, and the third threaded rod and the third nut.

[0014] Preferably, both sides of the sliding plate are provided with connecting plates arranged along the length of the sliding plate, and both ends of the connecting plates are provided with connecting blocks for connecting the sliding plate and the connecting plates; the connecting blocks, the sliding plate and the connecting plates together form a storage area for the third nut and the second nut to extend into; the connecting plates are provided with a plurality of fifth through holes spaced apart along the length of the connecting plates.

[0015] With this invention, construction workers pass bolts through the through holes drilled at both ends of the bridge base and through the fifth through hole on the connecting plate to connect the connecting plate to the bridge base; through the storage area, the third nut and the second nut will extend into the storage area to prevent the third nut and the second nut from affecting the connection between the sliding plate and the bridge base.

[0016] Preferably, the support includes a connecting sleeve, with a first baffle and a second baffle fixedly connected to both ends of the connecting sleeve. The connecting sleeve, the first baffle, and the second baffle together constitute a storage area for storing concrete.

[0017] With this invention, when construction workers are making the support base, one end of the connecting sleeve is first welded to the second baffle. After the welding is completed, concrete is injected into the connecting sleeve until the inside of the connecting sleeve is filled with concrete. Finally, the first baffle is welded to the upper end of the connecting sleeve to prevent concrete leakage. The concrete is stored in the storage area, thereby further strengthening the overall structural strength of the support base.

[0018] Preferably, the first baffle and the second baffle are rectangular in shape, and bolt holes are provided at the corners of the first baffle and the second baffle. The first baffle and the second baffle of adjacent support seats are connected by bolts passing through the bolt holes.

[0019] With this invention, after stacking the support bases, two adjacent support bases are connected by bolts to prevent the two adjacent support bases from detaching.

[0020] Preferably, the second baffle is provided with a plurality of limiting holes distributed along the circumference of the connecting sleeve, and the end face of the first baffle away from the second baffle is provided with a reinforcing block corresponding to the limiting holes and passing through the limiting holes.

[0021] With this invention, when it is necessary to stack support bases, the reinforcing block on the first baffle of the lower support base will pass through the limiting hole on the second baffle of the upper support base, thereby limiting the upper support base and making it convenient for construction personnel to install bolts to connect the upper and lower support bases.

[0022] This invention provides a method for constructing beam and slab lifting, which is achieved by the aforementioned lifting device. The steps are as follows. S1. Construction Preparation On the bridge base below the beam to be lifted, set up lifting points and limiting points. The lifting points are set directly below the original support of the beam or the web of the main beam. The limiting points are located at both ends of the bridge base. After the limiting points are determined, drill multiple through holes at both ends of the side wall of the bridge base with an electric drill. The multiple through holes are spaced apart along the length of the bridge base. S2. Install limit components Limiting components are installed at the limiting points, so that the fixed seat and the bridge base are connected by bolts passing through the through holes. The diagonal bracing mechanism is adjusted so that the first diagonal bracing plate makes close contact with the bottom or side surface of the beam plate, thus forming a spatial constraint. S3. Install the lifting and temporary support components. Install jacks at the lifting points and simultaneously assemble temporary support components on one side of the jacks; the installation of the main body of the support components involves stacking and fixing multiple components sequentially between the bridge base and the beam, and adjusting the rotating ball head at the top to make it fully fit with the bottom surface of the beam to form auxiliary support. S4. Coordinated Lifting and Dynamic Limiting Start the jacks to lift in stages. After each stage of lifting is completed, while maintaining the pressure of the jacks, immediately adjust the position of the first and second inclined plates on the fixed seat so that the first inclined plate makes close contact with the bottom or side of the beam plate; and check the contact status of the rotating ball head. S5. Load Transfer and Cyclic Operations When the beam is lifted to the height of a support, the support at the corresponding height is connected above the previous support. Then the load of the jacks is completely transferred to the temporary support components of that layer. The jacks are then lowered to start the next lifting cycle. S6. Post-construction processing After the beams and slabs reach the predetermined elevation, the permanent supports are installed and constructed. Then, the jacks, temporary support components, and limit components are unloaded and removed in stages.

[0023] Through this invention, holes are drilled in the side wall of the bridge pier, and a limiting device with diagonal bracing is installed with bolts. Compared with traditional welding, this not only does not damage the original structure, but also forms a rigid connection that can actively tighten the beam and effectively prevent displacement and slippage. Using a set of modular support bases with decreasing height and fixed connection, the jacking process can be carried out in a cyclical manner according to standard steps, which is highly efficient; the rotating ball head at the top can automatically adapt to the uneven bottom of the beam, achieving full-area support and avoiding the risk of local crushing; through the combination of methods and devices, construction efficiency is further improved and the construction cycle is shortened.

[0024] Preferably, the adjustment of the rotating ball head in step S3 is performed after the jack applies an initial pre-jacking force to lift the beam.

[0025] This invention enables the rotating ball joint to automatically level and fit tightly under the actual stress state of the beam and slab, thereby achieving the most effective full-area support and completely eliminating the risks of loose connections and local stress concentration.

[0026] Preferably, in step S3, when assembling the main body of the support component, the bottommost support base is fixedly connected to the bridge base foundation by anchor bolts or embedded parts.

[0027] This invention fundamentally eliminates the risk of slippage at the bottom of the support base, transforming the entire device from a collection of movable modules into a single load-bearing unit, thus significantly improving its anti-overturning capability and overall safety. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the main body of the component in Example 1.

[0029] Figure 2 This is an exploded view of the main body of the component in Example 1.

[0030] Figure 3 A schematic diagram of the sliding plate in Example 1.

[0031] Figure 4 A schematic diagram of the diagonal bracing mechanism in Example 1.

[0032] Figure 5 A schematic diagram of the second diagonal brace in Example 1.

[0033] Figure 6 A schematic diagram of the first diagonal brace in Example 1.

[0034] Figure 7 A schematic diagram of the installation position of the main component in Example 1.

[0035] Figure 8 A schematic diagram of the main body of the support component in Example 1.

[0036] Figure 9 Exploded view of the main body of the support component in Example 1.

[0037] Figure 10 A schematic diagram of the support base in Example 1.

[0038] Figure 11 Exploded view of the support base in Example 1.

[0039] Figure 12 Cross-sectional view of the main body of the support component in Example 1.

[0040] Figure 13 A schematic diagram of the construction status of the main support component in Example 1. Detailed Implementation

[0041] To further understand the content of this invention, the invention will be described in detail with reference to the embodiments. It should be understood that the embodiments are merely illustrative and not limiting of the invention.

[0042] Example 1 like Figure 1-13 As shown, this embodiment provides a lifting device, which includes a limiting component and a temporary support component. The limiting component includes a component body 3100, which includes a stabilizing seat 3120 for connecting to the bridge base. A diagonal bracing mechanism 3110 is provided above the stabilizing seat 3120. The diagonal bracing mechanism 3110 includes a first diagonal bracing plate 3220 for supporting the bridge and a second diagonal bracing plate 3210 for supporting the first diagonal bracing plate 3220. A plurality of limiting mechanisms are provided at the stabilizing seat 3120 at intervals along the length direction of the stabilizing seat 3120. The limiting mechanisms are used to fix the first diagonal bracing plate 3220 and the second diagonal bracing plate 3210. The temporary support assembly includes a support assembly body 3800 disposed between the beam and the pier. The support assembly body 3800 includes a plurality of support seats 3820 spaced apart along the height direction of the pier. The top of each support seat 3820 is provided with a rotating ball head 3810 for adjusting the support angle. The height of the plurality of connected support seats 3820 gradually decreases from bottom to top. Adjacent support seats 3820 are fixedly connected.

[0043] In this embodiment, before lifting the beam, the construction workers set lifting points and limiting points on the bridge base below the beam to be lifted. The lifting points are located directly below the original supports or web of the main beam, and the limiting points are located at both ends of the bridge base. After the limiting points are determined, multiple through holes are drilled at both ends of the bridge base sidewalls using an electric drill. These through holes are spaced apart along the length of the bridge base. After the through holes are drilled, the construction workers first place the stabilizing seat 3120 on the main body 3100 of the component at the through hole position, aligning the through hole on the bridge base with the fifth through hole 3310 on the connecting plate 3250. Then, bolts are used to connect the stabilizing seat 3120 to the bridge base through the through hole. After the stabilizing seat 3120 is fixed, the construction workers connect the diagonal bracing mechanism 3110 to the stabilizing seat 3120. One end of a diagonal brace 3220 extends toward a sliding plate 3230. Then, a second threaded rod 3450 passes through a third through hole 3320 on the sliding plate 3230 and a fourth through hole 3620 on the first diagonal brace 3220. Then, a second nut 3460 is screwed onto both ends of the second threaded rod 3450 to rotatably connect the first diagonal brace 3220 and the sliding plate 3230. Then, the second diagonal brace 3210 and the first diagonal brace 3220 are rotatably connected in the same way through the first threaded rod 3420 and the first nut 3410. Then, the first diagonal brace 3220 is adjusted to form a tight contact with the bottom or side surface of the beam plate. Finally, the lower end of the second diagonal brace 3210 is fixedly connected to the sliding plate 3230 through the third threaded rod 3440 and the third nut 3430, thereby supporting the first diagonal brace 3220. After the inclined bracing mechanism 3110 is completed, jacks are installed at the jacking points, and temporary support components are assembled simultaneously on one side of the jacks. When installing the temporary support components, support seats 3820 of different heights are first stacked according to the height between the bridge base and the beam, until the support seats 3820 can reach the beam position. When connecting the support seats 3820, bolts are passed through the bolt holes 31001 on the first baffle 31003 at the upper end of the lower support seat 3820 and the bolt holes 31001 on the second baffle 31004 at the lower end of the upper support seat 3820 to fix two adjacent support seats 3820 together. Then, the support seats 3820 are connected and stacked in the same way. After the support seats 3820 are stacked to the required height, the construction workers adjust the rotating ball head 3810 at the top to make it fully fit with the bottom surface of the beam to form auxiliary support. After the limit assembly and temporary support assembly are installed, the jacks are used for staged lifting, lifting a certain distance each time, with the lifting distance gradually decreasing each time. After each stage of lifting, the jacks stop lifting. At this point, the construction workers loosen the connecting bolts between the stabilizer 3120 and the bridge base, adjust the position of the stabilizer 3120, and then reconnect the stabilizer 3120 to the bridge base using bolts. After the stabilizer 3120 is adjusted, the connection positions of the first diagonal brace 3220 and the second diagonal brace 3210 with the stabilizer 3120 are adjusted so that the first diagonal brace... Plate 3220 forms a tight contact with the bottom or side surface of the beam slab; after the limiting component is adjusted, remove the rotating ball head 3810 from the top of the support base 3820, stack the support bases 3820 to a suitable height, and then place the rotating ball head 3810 on top of the support base 3820. Adjust the rotating ball head 3810 at the top to make it fully fit with the bottom surface of the beam slab; then lower the jack to carry out the next cycle of lifting; then repeat the above operation until the beam slab reaches the expected height, and then remove the jack, temporary support component and limiting component.

[0044] In summary, compared with traditional structures, the limiting components allow construction workers to continuously adjust their position and support angle according to the lifting process of the beam, enabling them to follow the beam's upward trajectory and change their support state. This prevents the beam from deviating during the lifting process, which is difficult to correct effectively. At the same time, the limiting components do not require welding or steel wedges for fixing, thus causing less damage to the original bridge abutment concrete structure.

[0045] Compared to existing technologies, the temporary support assembly features a top rotating ball head 3810 that automatically adjusts its angle, ensuring a tight fit between the support seat 3820 and the beam bottom regardless of its flatness. This distributes the concentrated force of the jack evenly as a surface load, avoiding the risk of localized concrete crushing caused by point or line contact with traditional rigid blocks. The design of all support seats having the same width but progressively decreasing height eliminates the need for complex measurements and calculations after each jacking operation, standardizing the construction process and speeding up the process. The jacking stroke and final posture are controllable at each step, reducing the risk of over-jacking or insecure support due to measurement or judgment errors. The fixed connection between adjacent support seats 3820 solves the problems of poor overall integrity and low stiffness in traditional block stacking systems. This fixed connection ensures that the support system can effectively resist bending moments caused by horizontal forces or eccentric loads, resulting in greater stability.

[0046] In this embodiment, the first inclined plate 3220 and the second inclined plate 3210 have U-shaped cross sections. The second inclined plate 3210 has a first through hole 3520 at both ends of its sidewall. The first inclined plate 3220 has a second through hole 3610 at its sidewall, which corresponds to the first through hole 3520. The first inclined plate 3220 has a first threaded rod 3420 that is arranged along the width direction of the first inclined plate 3220 and passes through the first through hole 3520 and the second through hole 3610. The first threaded rod 3420 has a first nut 3410 at both ends that is threadedly engaged with the first threaded rod 3420.

[0047] In this embodiment, the first diagonal brace 3220 and the second diagonal brace 3210 are made of channel steel. The first threaded rod 3420 and the first nut 3410 cooperate to connect the second diagonal brace 3210 and the first diagonal brace 3220, so that the second diagonal brace 3210 and the first diagonal brace 3220 can rotate at the connection point. This allows construction personnel to adjust the support angle of the first diagonal brace 3220 by adjusting the rotation angle of the second diagonal brace 3210 and the first diagonal brace 3220, so that the first diagonal brace 3220 can fit tightly with the bottom or side of the beam or slab. At the same time, it can adapt to the bottom or side of the beam or slab with different inclinations.

[0048] In this embodiment, the stabilizing base 3120 includes a sliding plate 3230 with a U-shaped cross-section. The limiting mechanism includes a plurality of third through holes 3320 disposed on the side walls of both sides of the sliding plate 3230. The plurality of third through holes 3320 are spaced apart along the length direction of the sliding plate 3230. The first inclined support plate 3220 is provided with a fourth through hole 3620 corresponding to the third through hole 3320 at one end of its side wall near the sliding plate 3230. The first inclined support plate 3220 is provided with a second threaded rod 3450 disposed along the width direction of the first inclined support plate 3220 and passing through the fourth through hole 3620 and the third through hole 3320 at both ends. The second threaded rod 3450 is provided with a second nut 3460 threadedly engaged with the second threaded rod 3450 at both ends. The second inclined plate 3210 is provided with a third threaded rod 3440 at one end near the sliding plate 3230, which is arranged along the width direction of the second inclined plate 3210. Both ends of the third threaded rod 3440 pass through the first through hole 3520 and the third through hole 3320, and both ends of the third threaded rod 3440 are provided with a third nut 3430 that is threadedly engaged with the third threaded rod 3440.

[0049] This embodiment facilitates the connection between the first inclined plate 3220 and the sliding plate 3230, as well as the second inclined plate 3210 and the sliding plate 3230, by the cooperation of the second threaded rod 3450 and the second nut 3460, the third threaded rod 3440 and the third nut 3430.

[0050] In this embodiment, both sides of the sliding plate 3230 are provided with connecting plates 3250 arranged along the length direction of the sliding plate 3230, and both ends of the connecting plates 3250 are provided with connecting blocks 3240 for connecting the sliding plate 3230 and the connecting plates 3250; the connecting blocks 3240, the sliding plate 3230 and the connecting plates 3250 together constitute a storage area for the third nut 3430 and the second nut 3460 to extend into; the connecting plates 3250 are provided with a plurality of fifth through holes 3310 spaced apart along the length direction of the connecting plates 3250.

[0051] In this embodiment, the construction personnel pass the bolts through the through holes drilled at both ends of the bridge base and through the fifth through hole 3310 on the connecting plate 3250 to connect the connecting plate 3250 to the bridge base. Through the storage area, the third nut 3430 and the second nut 3460 will extend into the storage area to prevent the third nut 3430 and the second nut 3460 from affecting the connection between the sliding plate 3230 and the bridge base.

[0052] In this embodiment, the support base 3820 includes a connecting sleeve 31005. The two ends of the connecting sleeve 31005 are respectively provided with a first baffle 31003 and a second baffle 31004 fixedly connected to the connecting sleeve 31005. The connecting sleeve 31005, the first baffle 31003 and the second baffle 31004 together constitute a storage area 31201 for storing concrete.

[0053] In this embodiment, when the construction workers are making the support base 3820, one end of the connecting sleeve 31005 is first welded to the second baffle 31004. After the welding is completed, concrete is injected into the connecting sleeve 31005 until the inside of the connecting sleeve 31005 is filled with concrete. Finally, the first baffle 31003 is welded to the upper end of the connecting sleeve 31005 to prevent concrete leakage. The concrete is stored in the storage area 31201, thereby further strengthening the overall structural strength of the support base 3820.

[0054] In this embodiment, the first baffle 31003 and the second baffle 31004 are rectangular in shape. Bolt holes 31001 are provided at the corners of the first baffle 31003 and the second baffle 31004. The first baffle 31003 and the second baffle 31004 of the adjacent support base 3820 are connected by bolts passing through the bolt holes 31001.

[0055] In this embodiment, after stacking the support bases 3820, two adjacent support bases 3820 are connected by bolts to prevent the two adjacent support bases 3820 from detaching.

[0056] In this embodiment, the second baffle 31004 is provided with a plurality of limiting holes 31006 distributed circumferentially along the connecting sleeve 31005, and the first baffle 31003 is provided with a reinforcing block 31002 at one end face away from the second baffle 31004 that corresponds to the limiting holes 31006 and passes through the limiting holes 31006.

[0057] In this embodiment, when it is necessary to stack support bases 3820, the reinforcing block 31002 on the first baffle 31003 of the lower support base 3820 will pass through the limiting hole 31006 on the second baffle 31004 of the upper support base 3820, thereby limiting the upper support base 3820 and making it convenient for construction personnel to install bolts to connect the upper and lower support bases 3820.

[0058] This embodiment provides a method for constructing beam and slab lifting, which is achieved by the aforementioned lifting device. The steps are as follows. S1. Construction Preparation On the bridge base below the beam to be lifted, set up lifting points and limiting points. The lifting points are set directly below the original support of the beam or the web of the main beam. The limiting points are located at both ends of the bridge base. After the limiting points are determined, drill multiple through holes at both ends of the side wall of the bridge base with an electric drill. The multiple through holes are spaced apart along the length of the bridge base. S2. Install limit components Limiting components are installed at the limiting points so that the stabilizing seat 3120 and the bridge base are connected by bolts passing through the through holes. The diagonal bracing mechanism 3110 is adjusted so that the first diagonal bracing plate 3220 forms a tight contact with the bottom or side surface of the beam plate, thus constraining the space. S3. Install the lifting and temporary support components. Install jacks at the lifting points and simultaneously assemble temporary support components on one side of the jacks; the installation of the main body 3800 of the support components involves stacking and fixing multiple components between the bridge base and the beam plate, and adjusting the rotating ball head 3810 at the top to make it fully fit with the bottom surface of the beam plate to form auxiliary support. S4. Coordinated Lifting and Dynamic Limiting Start the jacks to lift in stages. After each stage of lifting is completed, while maintaining the pressure of the jacks, immediately adjust the position of the first inclined plate 3220 and the second inclined plate 3210 on the stabilizer 3120 so that the first inclined plate 3220 makes close contact with the bottom or side of the beam plate; and check the contact status of the rotating ball head 3810. S5. Load Transfer and Cyclic Operations When the beam is lifted to the height of a support 3820, the support 3820 of the corresponding height is connected above the previous support 3820. Then the load of the jacks is completely transferred to the temporary support components of this layer. Then the jacks are lowered to carry out the next cycle of lifting. S6. Post-construction processing After the beams and slabs reach the predetermined elevation, the permanent supports are installed and constructed. Then, the jacks, temporary support components, and limit components are unloaded and removed in stages.

[0059] In this embodiment, holes are drilled in the side wall of the pier, and a limiting device with diagonal bracing is installed with bolts. Compared with traditional welding, this not only does not damage the original structure, but also forms a rigid connection that can actively tighten the beam and effectively prevent displacement and slippage. Using a set of modular support bases with decreasing height and fixed connection, the jacking process can be carried out in a cyclical manner according to standard steps, which is highly efficient; the rotating ball head at the top can automatically adapt to the uneven bottom of the beam, achieving full-area support and avoiding the risk of local crushing; through the combination of methods and devices, construction efficiency is further improved and the construction cycle is shortened.

[0060] In this embodiment, the adjustment of the rotating ball head 3810 in step S3 is carried out after the jack applies an initial pre-jacking force to lift the beam plate.

[0061] This embodiment enables the rotating ball head 3810 to automatically level and fit tightly under the actual stress state of the beam and slab, thereby achieving the most effective full-area support and completely eliminating the risks of loose connections and local stress concentration.

[0062] In this embodiment, during step S3, when assembling the main body 3800 of the support component, the bottom support base 3820 is fixedly connected to the bridge base foundation by anchor bolts or embedded parts.

[0063] This embodiment fundamentally eliminates the risk of slippage at the bottom of the support base 3820, transforming the entire device from a collection of movable modules into a single load-bearing unit, thus significantly improving its anti-overturning capability and overall safety.

[0064] Example 2 like Figure 1-7 As shown, this embodiment provides a limiting component, including a component body 3100. The component body 3100 includes a stabilizing seat 3120 for connecting with a bridge base. A diagonal bracing mechanism 3110 is provided above the stabilizing seat 3120. The diagonal bracing mechanism 3110 includes a first diagonal bracing plate 3220 for supporting the bridge and a second diagonal bracing plate 3210 for supporting the first diagonal bracing plate 3220. A plurality of limiting mechanisms are provided at the stabilizing seat 3120 at intervals along the length direction of the stabilizing seat 3120. The limiting mechanisms are used to fix the first diagonal bracing plate 3220 and the second diagonal bracing plate 3210.

[0065] In this embodiment, before lifting the beam, the construction workers set lifting points and limiting points on the bridge base below the beam to be lifted. The lifting points are located directly below the original supports or web of the main beam, and the limiting points are located at both ends of the bridge base. After the limiting points are determined, multiple through holes are drilled at both ends of the bridge base sidewalls using an electric drill. These through holes are spaced apart along the length of the bridge base. After the through holes are drilled, the construction workers first place the stabilizing seat 3120 on the main body 3100 of the component at the through hole position, aligning the through hole on the bridge base with the fifth through hole 3310 on the connecting plate 3250. Then, bolts are used to connect the stabilizing seat 3120 to the bridge base through the through hole. After the stabilizing seat 3120 is fixed, the construction workers connect the diagonal bracing mechanism 3110 to the stabilizing seat 3120. One end of a diagonal brace 3220 extends toward a sliding plate 3230. Then, a second threaded rod 3450 passes through a third through hole 3320 on the sliding plate 3230 and a fourth through hole 3620 on the first diagonal brace 3220. Then, a second nut 3460 is screwed onto both ends of the second threaded rod 3450 to rotatably connect the first diagonal brace 3220 and the sliding plate 3230. Then, the second diagonal brace 3210 and the first diagonal brace 3220 are rotatably connected in the same way through the first threaded rod 3420 and the first nut 3410. Then, the first diagonal brace 3220 is adjusted to form a tight contact with the bottom or side surface of the beam plate. Finally, the lower end of the second diagonal brace 3210 is fixedly connected to the sliding plate 3230 through the third threaded rod 3440 and the third nut 3430, thereby supporting the first diagonal brace 3220. After the limit components are installed, the jacks are started to lift the bridge in stages, lifting a certain distance each time, with the lifting distance gradually decreasing each time. After each stage of lifting, the jacks stop lifting. At this time, the construction personnel loosen the connecting bolts between the stabilizer 3120 and the bridge base, adjust the position of the stabilizer 3120, and then reconnect the stabilizer 3120 to the bridge base with bolts. After the stabilizer 3120 is adjusted, the connection position between the first diagonal brace 3220 and the second diagonal brace 3210 and the stabilizer 3120 is adjusted so that the first diagonal brace 3220 forms a tight contact with the bottom or side of the beam. Compared with traditional structures, the limiting component allows construction workers to continuously adjust its position and support angle according to the lifting process of the beam, enabling the limiting component to follow the rising trajectory of the beam and change its support state to prevent the beam from deviating during the lifting process, which is difficult to correct effectively. At the same time, the limiting component does not require welding or driving in steel wedges to fix it, causing less damage to the original bridge abutment concrete structure.

[0066] In this embodiment, the first inclined plate 3220 and the second inclined plate 3210 have U-shaped cross sections. The second inclined plate 3210 has a first through hole 3520 at both ends of its sidewall. The first inclined plate 3220 has a second through hole 3610 at its sidewall, which corresponds to the first through hole 3520. The first inclined plate 3220 has a first threaded rod 3420 that is arranged along the width direction of the first inclined plate 3220 and passes through the first through hole 3520 and the second through hole 3610. The first threaded rod 3420 has a first nut 3410 at both ends that is threadedly engaged with the first threaded rod 3420.

[0067] In this embodiment, the first diagonal brace 3220 and the second diagonal brace 3210 are made of channel steel. The first threaded rod 3420 and the first nut 3410 cooperate to connect the second diagonal brace 3210 and the first diagonal brace 3220, so that the second diagonal brace 3210 and the first diagonal brace 3220 can rotate at the connection point. This allows construction personnel to adjust the support angle of the first diagonal brace 3220 by adjusting the rotation angle of the second diagonal brace 3210 and the first diagonal brace 3220, so that the first diagonal brace 3220 can fit tightly with the bottom or side of the beam or slab. At the same time, it can adapt to the bottom or side of the beam or slab with different inclinations.

[0068] In this embodiment, the stabilizing base 3120 includes a sliding plate 3230 with a U-shaped cross-section. The limiting mechanism includes a plurality of third through holes 3320 disposed on the side walls of both sides of the sliding plate 3230. The plurality of third through holes 3320 are spaced apart along the length direction of the sliding plate 3230. The first inclined support plate 3220 is provided with a fourth through hole 3620 corresponding to the third through hole 3320 at one end of its side wall near the sliding plate 3230. The first inclined support plate 3220 is provided with a second threaded rod 3450 disposed along the width direction of the first inclined support plate 3220 and passing through the fourth through hole 3620 and the third through hole 3320 at both ends. The second threaded rod 3450 is provided with a second nut 3460 threadedly engaged with the second threaded rod 3450 at both ends. The second inclined plate 3210 is provided with a third threaded rod 3440 at one end near the sliding plate 3230, which is arranged along the width direction of the second inclined plate 3210. Both ends of the third threaded rod 3440 pass through the first through hole 3520 and the third through hole 3320, and both ends of the third threaded rod 3440 are provided with a third nut 3430 that is threadedly engaged with the third threaded rod 3440.

[0069] This embodiment facilitates the connection between the first inclined plate 3220 and the sliding plate 3230, as well as the second inclined plate 3210 and the sliding plate 3230, by the cooperation of the second threaded rod 3450 and the second nut 3460, the third threaded rod 3440 and the third nut 3430.

[0070] In this embodiment, both sides of the sliding plate 3230 are provided with connecting plates 3250 arranged along the length direction of the sliding plate 3230, and both ends of the connecting plates 3250 are provided with connecting blocks 3240 for connecting the sliding plate 3230 and the connecting plates 3250; the connecting blocks 3240, the sliding plate 3230 and the connecting plates 3250 together constitute a storage area for the third nut 3430 and the second nut 3460 to extend into; the connecting plates 3250 are provided with a plurality of fifth through holes 3310 spaced apart along the length direction of the connecting plates 3250.

[0071] In this embodiment, the construction personnel pass the bolts through the through holes drilled at both ends of the bridge base and through the fifth through hole 3310 on the connecting plate 3250 to connect the connecting plate 3250 to the bridge base. Through the storage area, the third nut 3430 and the second nut 3460 will extend into the storage area to prevent the third nut 3430 and the second nut 3460 from affecting the connection between the sliding plate 3230 and the bridge base.

[0072] In this embodiment, mounting rings 3510 are provided on both ends of the second diagonal brace 3210 near the first through hole 3520.

[0073] In this embodiment, the mounting ring 3510 is welded to the side wall of the second diagonal brace 3210 and allows the third threaded rod 3440 to pass through. The mounting ring 3510 can fill the gap between the second diagonal brace 3210 and the sliding plate 3230, preventing the second diagonal brace 3210 from slipping when supporting the first diagonal brace 3220, and also improving the structural strength of the connection between the second diagonal brace 3210 and the sliding plate 3230.

[0074] In this embodiment, the first inclined support plate 3220 is provided with a first arc-shaped surface 3630 at one end near the sliding plate 3230.

[0075] In this embodiment, the first arc-shaped surface 3630 enables the first inclined support plate 3220 to rotate and adjust the support angle so that it will not be blocked by the sliding plate 3230.

[0076] In this embodiment, the second inclined plate 3210 has a second arc-shaped surface 3530 at both ends.

[0077] In this embodiment, the second arc-shaped surface 3530 ensures that the second inclined support plate 3210 is not blocked by the first inclined support plate 3220 and the sliding plate 3230 when it rotates, thus preventing it from being unable to rotate.

[0078] This embodiment includes a lifting device, which includes the aforementioned limiting component.

[0079] Example 3 like Figure 8-13As shown, this embodiment provides a temporary support assembly, characterized in that: it includes a support assembly body 3800 disposed between the beam and the pier, the support assembly body 3800 includes a plurality of support seats 3820 spaced apart along the height direction of the pier, and the top of the support seat 3820 is provided with a rotating ball head 3810 for adjusting the support angle; the height of the plurality of support seats 3820 gradually decreases from bottom to top; adjacent support seats 3820 are fixedly connected.

[0080] In this embodiment, before lifting the beam, construction workers set lifting points on the bridge base below the beam to be lifted. These lifting points are located directly below the existing supports or the web of the main beam. Then, jacks are installed at the lifting points, and temporary support components are simultaneously assembled on one side of the jacks. When installing the temporary support components, support seats 3820 of different heights are first stacked according to the height between the bridge base and the beam, until the support seats 3820 can reach the beam. Then, the supports are connected... When mounting the support 3820, bolts are passed through the bolt holes 31001 on the first baffle 31003 at the upper end of the lower support 3820 and the bolt holes 31001 on the second baffle 31004 at the lower end of the upper support 3820 to fix two adjacent support 3820s together. Then, the support 3820s are connected and stacked in the same way. After the support 3820s are stacked to the required height, the construction workers adjust the rotating ball head 3810 at the top to make it fully fit with the bottom surface of the beam and slab to form auxiliary support. After the temporary support components are installed, start the jacks for staged lifting, lifting a certain distance each time, with the lifting distance gradually decreasing each time. After each stage of lifting, stop lifting with the jacks, remove the rotating ball head 3810 from the top of the support base 3820, stack support bases 3820 to a suitable height, and then place the rotating ball head 3810 on top of the support base 3820. Adjust the rotating ball head 3810 at the top to ensure it is fully in contact with the bottom surface of the beam slab. Then lower the jacks to start the next cycle of lifting. Repeat the above operation until the beam slab reaches the expected height, then remove the jacks and temporary support components.

[0081] Compared to existing technologies, the temporary support assembly features a top rotating ball head 3810 that automatically adjusts its angle, ensuring a tight fit between the support seat 3820 and the beam bottom regardless of its flatness. This distributes the concentrated force of the jack evenly as a surface load, avoiding the risk of localized concrete crushing caused by point or line contact with traditional rigid blocks. The design of all support seats having the same width but progressively decreasing height eliminates the need for complex measurements and calculations after each jacking operation, standardizing the construction process and speeding up the process. The jacking stroke and final posture are controllable at each step, reducing the risk of over-jacking or insecure support due to measurement or judgment errors. The fixed connection between adjacent support seats 3820 solves the problems of poor overall integrity and low stiffness in traditional block stacking systems. This fixed connection ensures that the support system can effectively resist bending moments caused by horizontal forces or eccentric loads, resulting in greater stability.

[0082] In this embodiment, the support base 3820 includes a connecting sleeve 31005. The two ends of the connecting sleeve 31005 are respectively provided with a first baffle 31003 and a second baffle 31004 fixedly connected to the connecting sleeve 31005. The connecting sleeve 31005, the first baffle 31003 and the second baffle 31004 together constitute a storage area 31201 for storing concrete.

[0083] In this embodiment, when the construction workers are making the support base 3820, one end of the connecting sleeve 31005 is first welded to the second baffle 31004. After the welding is completed, concrete is injected into the connecting sleeve 31005 until the inside of the connecting sleeve 31005 is filled with concrete. Finally, the first baffle 31003 is welded to the upper end of the connecting sleeve 31005 to prevent concrete leakage. The concrete is stored in the storage area 31201, thereby further strengthening the overall structural strength of the support base 3820.

[0084] In this embodiment, the first baffle 31003 and the second baffle 31004 are rectangular in shape. Bolt holes 31001 are provided at the corners of the first baffle 31003 and the second baffle 31004. The first baffle 31003 and the second baffle 31004 of the adjacent support base 3820 are connected by bolts passing through the bolt holes 31001.

[0085] In this embodiment, after stacking the support bases 3820, two adjacent support bases 3820 are connected by bolts to prevent the two adjacent support bases 3820 from detaching.

[0086] In this embodiment, the second baffle 31004 is provided with a plurality of limiting holes 31006 distributed circumferentially along the connecting sleeve 31005, and the first baffle 31003 is provided with a reinforcing block 31002 at one end face away from the second baffle 31004 that corresponds to the limiting holes 31006 and passes through the limiting holes 31006.

[0087] In this embodiment, when it is necessary to stack support bases 3820, the reinforcing block 31002 on the first baffle 31003 of the lower support base 3820 will pass through the limiting hole 31006 on the second baffle 31004 of the upper support base 3820, thereby limiting the upper support base 3820 and making it convenient for construction personnel to install bolts to connect the upper and lower support bases 3820.

[0088] In this embodiment, the connecting sleeve 31005 is welded to the first baffle 31003 and the second baffle 31004.

[0089] In this embodiment, the first baffle 31003 and the second baffle 31004 are connected to the connecting sleeve 31005 by welding, so that the connecting sleeve 31005, the first baffle 31003 and the second baffle 31004 are integrated, which improves the structural strength of the support base 3820.

[0090] In this embodiment, the reinforcing block 31002 and the first baffle 31003 together form a limiting interval 31101 for limiting the rotating ball head 3810.

[0091] In this embodiment, the limiting interval 31101 can block the movement of the rotating ball head 3810 and prevent the rotating ball head 3810 from detaching from the support base 3820.

[0092] The model number of the 3810 swivel ball head is QTP-200.

[0093] This embodiment includes a lifting device, which includes the aforementioned temporary support component.

[0094] It is readily understood that those skilled in the art can combine, split, or reorganize the embodiments provided in this application to obtain other embodiments, all of which do not exceed the protection scope of this application.

[0095] The present invention and its embodiments have been described above illustratively. This description is not restrictive, and the embodiments shown are only part of the embodiments of the present invention. The actual structure is not limited thereto. Therefore, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the spirit of the present invention, they should all fall within the protection scope of the present invention.

Claims

1. A lifting device, characterized in that: The system includes a limiting component and a temporary support component. The limiting component includes a component body (3100), which includes a stabilizing seat (3120) for connecting to the bridge base. A diagonal bracing mechanism (3110) is provided above the stabilizing seat (3120). The diagonal bracing mechanism (3110) includes a first diagonal bracing plate (3220) for supporting the bridge and a second diagonal bracing plate (3210) for supporting the first diagonal bracing plate (3220). A plurality of limiting mechanisms are provided at the stabilizing seat (3120) at intervals along the length direction of the stabilizing seat (3120). The limiting mechanisms are used to fix the first diagonal bracing plate (3220) and the second diagonal bracing plate (3210). The temporary support assembly includes a support assembly body (3800) disposed between the beam and the pier. The support assembly body (3800) includes a plurality of support seats (3820) spaced apart along the height direction of the pier. The top of the support seat (3820) is provided with a rotating ball head (3810) for adjusting the support angle. The height of the plurality of connected support seats (3820) gradually decreases from bottom to top. Adjacent support seats (3820) are fixedly connected.

2. The lifting device according to claim 1, characterized in that: The first inclined plate (3220) and the second inclined plate (3210) have U-shaped cross sections. The second inclined plate (3210) has a first through hole (3520) at both ends of its side wall. The first inclined plate (3220) has a second through hole (3610) at its side wall corresponding to the first through hole (3520). The first inclined plate (3220) has a first threaded rod (3420) that is set along the width direction of the first inclined plate (3220) and passes through the first through hole (3520) and the second through hole (3610). The first threaded rod (3420) has a first nut (3410) at both ends of its first threaded rod (3420) that is threadedly engaged with the first threaded rod (3420).

3. A lifting device according to claim 2, characterized in that: The stabilizer (3120) includes a sliding plate (3230) with a U-shaped cross-section. The limiting mechanism includes a plurality of third through holes (3320) disposed on the side walls of both sides of the sliding plate (3230). The plurality of third through holes (3320) are spaced apart along the length of the sliding plate (3230). The first inclined plate (3220) has a fourth through hole (3620) disposed on the side wall near the sliding plate (3230) that corresponds to the third through hole (3320). The first inclined plate (3220) has a second threaded rod (3450) disposed at the end near the fourth through hole (3620) that is disposed along the width of the first inclined plate (3220) and passes through the fourth through hole (3620) and the third through hole (3320) at both ends. The second threaded rod (3450) has a second nut (3460) that is threadedly engaged with the second threaded rod (3450) at both ends. The second inclined plate (3210) is provided with a third threaded rod (3440) at one end near the sliding plate (3230) along the width direction of the second inclined plate (3210). Both ends of the third threaded rod (3440) pass through the first through hole (3520) and the third through hole (3320). Both ends of the third threaded rod (3440) are provided with a third nut (3430) that is threadedly engaged with the third threaded rod (3440).

4. A lifting device according to claim 3, characterized in that: Both sides of the sliding plate (3230) are provided with connecting plates (3250) arranged along the length direction of the sliding plate (3230). Both ends of the connecting plate (3250) are provided with connecting blocks (3240) for connecting the sliding plate (3230) and the connecting plate (3250). The connecting blocks (3240), the sliding plate (3230) and the connecting plate (3250) together constitute a storage area for the third nut (3430) and the second nut (3460) to extend into. The connecting plate (3250) is provided with a plurality of fifth through holes (3310) spaced along the length direction of the connecting plate (3250).

5. A lifting device according to claim 1, characterized in that: The support base (3820) includes a connecting sleeve (31005). The two ends of the connecting sleeve (31005) are respectively provided with a first baffle (31003) and a second baffle (31004) fixedly connected to the connecting sleeve (31005). The connecting sleeve (31005), the first baffle (31003) and the second baffle (31004) together constitute a storage area (31201) for storing concrete.

6. A lifting device according to claim 5, characterized in that: The first baffle (31003) and the second baffle (31004) are rectangular in shape. Bolt holes (31001) are provided at the corners of the first baffle (31003) and the second baffle (31004). The first baffle (31003) and the second baffle (31004) of the adjacent support base (3820) are connected by bolts passing through the bolt holes (31001).

7. A lifting device according to claim 5, characterized in that: The second baffle (31004) is provided with a plurality of limiting holes (31006) distributed circumferentially along the connecting sleeve (31005). The first baffle (31003) is provided with a reinforcing block (31002) at one end face away from the second baffle (31004) that corresponds to the limiting holes (31006) and passes through the limiting holes (31006).

8. A method for constructing a beam-slab jacking system, implemented using a jacking device as described in any one of claims 1-7, comprising the following steps: S1. Construction Preparation On the bridge base below the beam to be lifted, lift points and limit points are set. Lift points are set directly below the original supports of the beam or the web of the main beam. Limit points are located at both ends of the bridge base. After the limit points are determined, multiple through holes are drilled at both ends of the side wall of the bridge base using an electric drill. The multiple through holes are spaced apart along the length of the bridge base. S2. Install limit components Limiting components are installed at the limiting points so that the stabilizing seat (3120) and the bridge base are connected by bolts through the through holes. The diagonal bracing mechanism (3110) is adjusted so that the first diagonal bracing plate (3220) forms a tight contact with the bottom or side of the beam plate, thus constraining the space. S3. Install the lifting and temporary support components. Install jacks at the lifting points and simultaneously assemble temporary support components on one side of the jacks; the installation of the main body (3800) of the support components involves stacking and fixing multiple components between the bridge base and the beam plate, and adjusting the rotating ball head (3810) at the top to make it fully fit with the bottom surface of the beam plate to form auxiliary support. S4. Coordinated Lifting and Dynamic Limiting Start the jacks to lift in stages. After each stage of lifting is completed, while maintaining the pressure of the jacks, immediately adjust the position of the first inclined plate (3220) and the second inclined plate (3210) on the stabilizer (3120) so that the first inclined plate (3220) makes close contact with the bottom or side of the beam plate; and check the contact status of the rotating ball head (3810). S5. Load Transfer and Cyclic Operations When the beam is lifted to the height of a support (3820), the support (3820) of the corresponding height is connected above the previous support (3820), and then the load of the jack is completely transferred to the temporary support assembly of that layer. Then the jack is lowered to carry out the next cycle of lifting. S6. Post-construction processing After the beams and slabs reach the predetermined elevation, the permanent supports are installed and constructed. Then, the jacks, temporary support components, and limit components are unloaded and removed in stages.

9. A beam and slab jacking construction method according to claim 8, characterized in that: The adjustment of the rotating ball head (3810) in step S3 is carried out after the jack applies an initial pre-jacking force to lift the beam.

10. A beam and slab jacking construction method according to claim 8, characterized in that: In step S3, when assembling the main body of the support component (3800), the bottom support base (3820) is fixedly connected to the bridge base foundation by anchor bolts or embedded parts.

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