A jacking structure system and jacking method

Abstract

This invention provides a jacking structure system, including a foundation, tension rods, a jacked component, a jacking drive component, a reaction beam, and a sliding plate. The foundation is located between an existing structure and the sliding plate, with the sliding plate flush with the upper surface of the foundation. One end of the tension rod is connected to the foundation, and the other end is connected to the reaction beam. One end of the jacking drive component is connected to the reaction beam, and the other end abuts against the jacked component, thus jacking the component on the sliding plate onto the foundation. This invention ensures that the foundation pile foundation does not move forward and compress the foundation soil during the jacking process, completely avoiding any impact on adjacent existing structures and fully ensuring the operational safety of existing lines. Furthermore, it eliminates the need for large-area foundation reinforcement, the device has a simple structure and clear force transmission, and allows multiple jacked components to be jacked simultaneously without mutual interference, effectively shortening the construction period and saving costs.

Description

Technical Field

[0001] This invention relates to the field of jacking construction technology, specifically to a jacking structure system and jacking method. Background Technology

[0002] The rapid development of the coastal economy has led to a continuous increase in the volume of railway passenger and freight transport, especially with the planning and construction of urban railways. The construction of new railway lines near or even adjacent to existing high-speed railway lines is also increasing. The proximity of precast or cast-in-place bridges can easily affect the use of existing overhead contact lines and other equipment, as well as traffic safety. Therefore, the construction method of transverse jacking precast frame bridges is generally adopted.

[0003] Existing lateral pushing methods have the following shortcomings:

[0004] 1) Traditional jacking methods require the installation of reaction walls. In areas with deep soft soil, the reaction walls need to be reinforced separately. At the same time, under the action of large-tonnage jacking, the abutment piles of the frame bridge will move forward and squeeze the foundation soil, which will cause the arch deformation of the adjacent roadbed, bridge and tunnel, and even the track deformation to exceed the limit, affecting the operational safety of the existing line.

[0005] 2) Existing reaction walls are mostly fixed, requiring pre-construction or installation, which results in problems such as material waste, low efficiency, labor-intensive, uneconomical, and environmentally unfriendly. On the other hand, movable reaction walls require extensive foundation reinforcement and dozens or even hundreds of anchor bolt holes to move the reaction wall, making the project large-scale and uneconomical.

[0006] In summary, there is an urgent need for a jacking structure system and jacking method to solve the problems existing in the prior art. Summary of the Invention

[0007] The purpose of this invention is to provide a jacking structure system that addresses the problems of traditional jacking methods, such as pushing existing structures, being time-consuming, labor-intensive, uneconomical, and environmentally unfriendly. The specific technical solution is as follows:

[0008] A jacking structure system includes a pier, a tension rod, a jacked component, a jacking drive, a reaction beam, and a sliding plate. The pier is located between an existing structure and the sliding plate, and the sliding plate is disposed adjacent to the pier with its upper surface flush with the upper surface of the pier. One end of the tension rod is connected to the pier, and the other end is connected to the reaction beam. One end of the jacking drive is connected to the reaction beam, and the other end abuts against the jacked component, thereby jacking the jacked component on the sliding plate onto the pier.

[0009] In the preferred embodiment of the above technical solution, F1 is the tension force of the tension rod on the bearing platform, F2 is the friction force of the pushed component on the bearing platform, F3 is the friction force of the pushed component on the sliding plate, and the magnitude of F1 is equal to the propulsion force of the pushing drive component.

[0010] During the process of the pushed part being pushed at a constant speed by the pushing drive part, F1 is always equal to the sum of F3 and F2;

[0011] When the pushed part is completely on the slide plate, F2 is 0 and F3 is the maximum value. At this time, F3 = F1.

[0012] During the process of the pushed component being pushed from the slide plate to the bearing platform, F3 gradually decreases from its maximum value, while F2 gradually increases from 0. At this time, F1 > F2 and F1 > F3.

[0013] When the pushed component is fully pushed to the bearing platform, F3 is 0, F2 reaches its maximum value, and at this time F1 = F2.

[0014] In the preferred embodiment of the above technical solutions, multiple sets of tension rods and multiple sets of jacking drive components are symmetrically arranged according to the central vertical plane of the jacking component along the jacking direction.

[0015] In the preferred embodiment of the above technical solutions, the tension rod is provided with a rolling element, and the tension rod makes rolling contact with the pushed part through the rolling element.

[0016] In the preferred embodiment of the above technical solutions, the pushed component is provided with a through hole that allows the tension rod to pass through.

[0017] In the preferred embodiment of the above technical solutions, the tension rod is detachably connected to the reaction beam and the support platform.

[0018] In the preferred embodiment of the above technical solutions, a connecting plate is detachably provided on the support platform, and the tension rod is detachably connected to the connecting plate.

[0019] The preferred embodiment of the above technical solution also includes a power component, which is connected to the jacking drive component.

[0020] In the preferred embodiment of the above technical solutions, the bottom surface of the reaction beam is provided with a traveling wheel.

[0021] The present invention also provides a method for launching the aforementioned launching structure system:

[0022] Step 1: Install the connecting plate, tension rod, jacking drive component and reaction beam, and drive the jacking drive component to push the jacking component from the sliding plate towards the bearing platform;

[0023] Step 2: When the push drive component has completed its extension stroke, disconnect the connection between the tension rod and the reaction beam. The push drive component retracts while the reaction beam moves toward the component being pushed.

[0024] Step 3: After the jacking drive component retracts into place, reconnect the tension rod to the reaction beam, and the jacking drive component continues to extend and jack the pushed component.

[0025] Step 4: Repeat steps 2-3. After the pushed part is pushed into place, disassemble the connecting plate, tension rod, jacking drive component and reaction beam; reinstall the connecting plate, tension rod, jacking drive component and reaction beam to push the next pushed part.

[0026] The application of the technical solution of the present invention has the following beneficial effects:

[0027] This invention ensures that the pile foundation does not move forward and compress the foundation soil during the jacking process, completely avoiding any impact on adjacent existing buildings or structures (roadbeds, bridges, tunnels), and fully ensuring the operational safety of existing lines. Furthermore, this invention eliminates the need for large-scale foundation reinforcement; the device has a simple structure and clear force transmission, effectively reducing project costs.

[0028] Existing fixed or hoisted reaction walls require mechanical lifting and installation / adjustment when pushing beyond the jack stroke, resulting in low efficiency. The jacking structure system of this invention, however, only requires disassembling the tension rod and reaction beam, moving the reaction beam, and then reconnecting them to continue jacking, significantly improving work efficiency and reducing economic costs.

[0029] This invention features pre-drilled holes in the jacking component, preventing the tension rod from passing through the side of the jacking component and thus avoiding obstruction of the jacking path and space. Furthermore, this invention allows multiple jacking components to be jacked simultaneously without interference, effectively shortening the construction period and saving costs.

[0030] In addition to the objectives, features, and advantages described above, the present invention has other objectives, features, and advantages. The invention will now be described in further detail with reference to the figures. Attached Figure Description

[0031] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0032] Figure 1 This is the first axonometric drawing of the launching structure system;

[0033] Figure 2 This is the second axonometric drawing of the launching structure system;

[0034] Figure 3 This is a diagram showing the forces acting during the jacking process;

[0035] Among them, 1. Existing structure, 2. Connecting plate, 3. Foundation, 4. Tension rod, 5. Pushed component, 6. Pushing drive component, 7. Reaction beam, 8. Power component, 9. Slide plate, 10. Foundation. Detailed Implementation

[0036] To facilitate understanding of the present invention, a more comprehensive description is provided below, along with preferred embodiments. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a thorough and complete understanding of the disclosure of the present invention.

[0037] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0038] Example 1:

[0039] See Figures 1-3 A jacking structure system includes a pier 3, a tension rod 4, a jacked component 5, a jacking drive component 6, a reaction beam 7, and a sliding plate 9. The pier 3 is located between an existing structure 1 and the sliding plate 9, and the sliding plate 9 is arranged adjacent to the pier 3 with its upper surface flush with the upper surface of the pier 3. One end of the tension rod 4 is connected to the pier 3, and the other end is connected to the reaction beam 7. One end of the jacking drive component 6 is connected to the reaction beam 7, and the other end abuts against the jacked component 5, thereby jacking the jacked component 5 on the sliding plate 9 onto the pier 3.

[0040] Preferably, the sliding plate 9 is mounted on the foundation 10, which requires hardening treatment. In this embodiment, the jacking drive component 6 is a jack; the jacked component 5 is a frame bridge, which can be cast and then hoisted onto the sliding plate 9, or it can be cast on-site on the sliding plate 9.

[0041] Preferably, multiple sets of tension rods 4 and multiple sets of jacking drive components 6 are symmetrically arranged according to the central vertical plane of the jacking component 5 along the jacking direction. The symmetrical arrangement can ensure that the force is balanced during the jacking process.

[0042] See Figures 1-3 As shown, in this embodiment, there are four sets of tension rods 4, with two sets distributed on each side of the frame bridge (i.e., the jacked component), and the two sets of tension rods on the same side are distributed vertically. The function of the tension rods is to transfer the force exerted by the jacking drive 6 on the reaction beam 7 to the pier cap 3. This force can pull the pier cap away from the existing structure, preventing the pier cap from being squeezed against the existing structure 1 during the jacking process and eliminating the pushing effect.

[0043] Preferably, the jacking member 5 is provided with a through hole allowing the tension rod 4 to pass through. This through hole allows the tension rod 4 to connect to the side of the pier closest to the existing structure after passing through the frame bridge (i.e., the jacking member). In some cases (such as when the inner diameter of the through hole is not much different from the outer diameter of the tension rod), the cooperation between the through hole and the tension rod 4 can also guide the jacking movement of the jacking member, enabling the jacking member to be accurately jacked to the designated position. Of course, in some embodiments, the tension rod can also be directly arranged on both sides of the jacking member, that is, no through hole is provided on the jacking member.

[0044] To further optimize the guiding effect of the tension rod 4, some embodiments may include rolling elements on the tension rod 4. These rolling elements allow the tension rod 4 to roll into contact with the pushed component, effectively reducing friction between the tension rod and the pushed component. The rolling elements can be rollers or omnidirectional balls. At least one row of rolling elements along the length of the tension rod is provided. Through rolling contact between the rolling elements on multiple sets of tension rods and the pushed component, the pushed component moves along the direction of the tension rod, thus achieving precise guidance. When using the tension rod 4 for guidance, it is essential to ensure that the pushing force output by each pushing drive component is consistent. Furthermore, the tension rods should be arranged in parallel to prevent jamming between the pushed component and the tension rod due to uneven force distribution.

[0045] Furthermore, when the pushed component has a through hole, the tension rod 4 has multiple rows of rolling elements evenly distributed around its periphery, achieving rolling contact with the inner wall of the through hole through the rolling elements. When the tension rod is located on both sides of the pushed component (i.e., without a through hole), the rolling elements on the tension rod can roll into contact with the side wall of the pushed component, thereby achieving a guiding effect.

[0046] Preferably, the tension rod 4 is detachably connected to the reaction beam 7 and the support 3. In this embodiment, the detachable connection is preferably a threaded connection, but other connection methods may also be used, such as a pin connection.

[0047] See Figure 2 The support platform 3 is detachably provided with a connecting plate 2, and the tension rod 4 is detachably connected to the connecting plate 2. The purpose of setting the connecting plate is to provide an installation point for the tension rod to be connected to the support platform.

[0048] The jacking structure system also includes a power assembly 8, which is connected to the jacking drive component 6. Preferably, the power assembly 8 includes an oil tank and an oil pump, etc., and is used to provide pressurized oil to the jacking drive component (i.e., the jack).

[0049] More preferably, the bottom surface of the reaction beam 7 is provided with wheels for easy movement of the reaction beam.

[0050] Preferably, a pad is provided between the extended end of the jack and the bottom plate of the frame bridge, that is, the extended ends of multiple jacks are first connected to the pad, and then the pad is connected to the bottom plate of the frame bridge.

[0051] The jacking structure system in this embodiment ensures that the pier cap 3 will not push against the existing structure 1 during the jacking process. The force changes during the jacking process are as follows:

[0052] See Figure 3 F1 is the tension force of the tension rod 4 on the bearing 3, F2 is the friction force of the pushed part 5 on the bearing 3, F3 is the friction force of the pushed part 5 on the sliding plate 9, and the magnitude of F1 is equal to the pushing force of the pushing drive part 6.

[0053] During the process of being pushed at a constant speed by the pushing drive 6, the pushed component 5, F1 is always equal to the sum of F3 and F2;

[0054] When the pushed component 5 is completely on the slide plate 9, F2 is 0 and F3 is the maximum value. At this time, F3 = F1.

[0055] During the process of being pushed from the slide plate 9 to the support platform 3 by the pusher 5, F3 gradually decreases from its maximum value, and F2 gradually increases from 0. At this time, F1>F2, F1>F3;

[0056] When the pushed component 5 is completely pushed to the bearing platform 3, F3 is 0, F2 reaches its maximum value, and at this time F1 = F2.

[0057] According to the force changes during the jacking process, F1≥F2 during the entire jacking process, the resultant force on the pier is directed towards the sliding plate side or the resultant force is 0. Therefore, the jacking structure system of this embodiment eliminates the problem of the pier squeezing the existing structure 1 during the jacking process. The existing structure will not deform or settle due to the jacking movement, which is very suitable for jacking on deep soft soil foundations.

[0058] This embodiment also provides a method for launching the aforementioned launching structure system:

[0059] Step 1: Install the connecting plate 2, tension rod 4, jacking drive component 6 and reaction beam 7, and drive the jacking drive component 6 to push the jacking component 5 from the sliding plate 9 towards the bearing platform 3;

[0060] Step 2: When the push drive component 6 has completed its travel, disconnect the connection between the tension rod 4 and the reaction beam 7. The push drive component retracts and the reaction beam 7 moves toward the component being pushed 5.

[0061] Step 3: After the jacking drive component 6 retracts into place, reconnect the tension rod 4 to the reaction beam 7, and the jacking drive component 6 continues to extend to push the pushed component 5.

[0062] Step 4: Repeat steps 2-3. After the pushed component 5 is pushed into place, disassemble the connecting plate 2, tension rod 4, jacking drive component 6 and reaction beam 7; reinstall the connecting plate 2, tension rod 4, jacking drive component 6 and reaction beam 7 to push the next pushed component 5.

[0063] The jacking method in this embodiment solves the problem of insufficient travel of the jacking drive component. It allows the reaction beam to move in tandem with the movement of the jacked component 5. Therefore, the jacking structure system in this embodiment does not require the use of large-stroke jacks. Furthermore, since the connecting plate 2, tension rod 4, jacking drive component 6, and reaction beam 7 are all detachable, after the jacking of this frame bridge is completed, the connecting plate 2, tension rod 4, jacking drive component 6, and reaction beam 7 can be reinstalled to achieve the jacking of the next frame bridge. The jacking structure in this embodiment can be reused, resulting in high economic efficiency.

[0064] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A jacking structure system, characterized in that, The structure includes a base (3), a tension rod (4), a jacked component (5), a jacking drive (6), a reaction beam (7), and a sliding plate (9). The base (3) is located between the existing structure (1) and the sliding plate (9). The sliding plate (9) is set close to the base (3) and its upper surface is flush with the upper surface of the base (3). One end of the tension rod (4) is connected to the base (3), and the other end is connected to the reaction beam (7). One end of the jacking drive (6) is connected to the reaction beam (7), and the other end presses against the jacked component (5). The jacking drive (6) pushes the jacked component (5) on the sliding plate (9) onto the base (3). The tension rod (4) is detachably connected to the reaction beam (7) and the support platform (3); The support platform (3) is detachably provided with a connecting plate (2), and the tension rod (4) is detachably connected to the connecting plate (2); It also includes a power assembly (8), which is connected to the push drive (6).

2. The jacking structure system according to claim 1, characterized in that, F1 is the tension of the tension rod (4) on the bearing platform (3), F2 is the friction of the pushed part (5) on the bearing platform (3), F3 is the friction of the pushed part (5) on the sliding plate (9), and the magnitude of F1 is equal to the thrust of the pushing drive part (6). During the uniform jacking process of the jacked component (5) and the jacked driving component (6), F1 is always equal to the sum of F3 and F2; When the pushed part (5) is completely on the slide plate (9), F2 is 0 and F3 is the maximum value. At this time, F3 = F1. During the process of the pusher (5) pushing from the slide plate (9) to the support platform (3), F3 gradually decreases from its maximum value, and F2 gradually increases from 0. At this time, F1 > F2 and F1 > F3. When the pushed part (5) is completely pushed to the bearing platform (3), F3 is 0, F2 reaches its maximum value, and at this time F1=F2.

3. The jacking structure system according to claim 2, characterized in that, Multiple sets of tension rods (4) and multiple sets of jacking drive components (6) are symmetrically arranged on the central vertical plane of the jacking component along the jacking direction.

4. The jacking structure system according to claim 3, characterized in that, The tension rod (4) is provided with a rolling element, and the tension rod (4) makes rolling contact with the pushed part through the rolling element.

5. The jacking structure system according to claim 3 or 4, characterized in that, The push-up member (5) is provided with a through hole that allows the tension rod (4) to pass through.

6. The jacking structure system according to claim 1, characterized in that, The bottom surface of the reaction beam (7) is provided with a traveling wheel.

7. A method for launching a launching structure system as described in any one of claims 1-6, characterized in that: Step 1: Install the connecting plate (2), tension rod (4), jacking drive component (6) and reaction beam (7), and drive the jacking drive component (6) to push the jacking component (5) from the sliding plate (9) towards the bearing platform (3); Step 2: When the push drive (6) has completed its stroke, disconnect the connection between the tension rod (4) and the reaction beam (7). The push drive retracts and the reaction beam (7) moves toward the push-up part (5). Step 3: After the push drive (6) retracts into place, reconnect the tension rod (4) with the reaction beam (7), and the push drive (6) continues to extend to push the pushed part (5). Step 4: Repeat steps 2-3. After the pushed part (5) is pushed into place, disassemble the connecting plate (2), tension rod (4), push drive (6) and reaction beam (7); reinstall the connecting plate (2), tension rod (4), push drive (6) and reaction beam (7) to push the next pushed part (5).

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