Self-stabilizing multi-point bridge jacking device

Abstract

The invention relates to the technical field of building bridge supporting, in particular to a self-stabilizing multi-point bridge jacking device which comprises a mounting base. According to the self-stabilizing multi-point bridge jacking device, a bottom electronic level meter is arranged on an embedded bottom detection disc on the lower surface of a mounting base, and a top electronic level meter is mounted on the upper surface of a top supporting frame, so that the levelness of the base and the levelness of a supporting surface are monitored; the angle change of the jacking surface can be monitored in real time, so that data are accurately transmitted to a control computer, synchronous control is facilitated, and the operation is more convenient; a main hydraulic ejector rod is inserted into an opening in the upper end of a mounting base, an auxiliary hydraulic stable ejector rod is inserted into an opening in the lower end of a bottom side mounting cylinder, the lifting stroke can be increased, angle adjustment can be conducted according to needs, an independent control mode is adopted, operation is more diversified, and the application range is wider.

Description

Technical Field

[0001] This invention relates to the field of bridge support technology, and in particular to a self-stabilizing multi-point bridge jacking device. Background Technology

[0002] The main function of bridge jacking technology is to raise the elevation of the bridge superstructure (beams) either entirely or partially to meet various engineering requirements. Its specific functions are reflected in the following aspects: Addressing insufficient clearance under bridges: When new roads, railways, or waterways need to be built or upgraded under a bridge, the existing bridge's clearance may not meet the new traffic requirements. By jacking up the bridge, the clearance under it can be increased once and for all, avoiding demolition and reconstruction.

[0003] Bridge alignment correction and repositioning: Due to uneven foundation settlement, earthquakes, ship collisions, and other reasons, bridge piers and abutments may shift or rotate, causing misalignment or tilting of the bridge beams. Lifting technology can be used for overall alignment correction, restoring the bridge beams to their designed positions.

[0004] Bridge bearing replacement: Bridge bearings are consumable parts and need to be replaced after reaching the end of their service life. Lifting technology can slightly raise the bridge structure, providing the necessary operating space for bearing replacement, which is one of the most common application scenarios.

[0005] Route elevation adjustment: When road upgrades and reconstruction require adjustments to the longitudinal profile, existing bridges can be jacked up to match the new road surface elevation, ensuring smooth driving.

[0006] Synchronous jacking to extend service life: In the reinforcement of old bridges, jacking technology is used to remove the load of the beams on the substructure, which makes it easier to reinforce and strengthen the piers and cap beams, thereby extending the service life of the entire bridge.

[0007] Based on the principles and scale of lifting, the main methods currently available on the market can be divided into the following: synchronous lifting and alternating lifting.

[0008] Synchronous jacking is currently the most advanced and widely used method. It uses a computer-controlled hydraulic system to connect multiple hydraulic jacks through a network, achieving synchronous, uniform, and level lifting.

[0009] Working principle: Hundreds or even thousands of tons of hydraulic jacks are installed at designated locations on the bridge (usually on top of the piers). All jacks are connected to a central pump station via oil pipes. The computer adjusts the oil pressure and flow rate in real time based on data from displacement sensors installed at each lifting point, ensuring that the entire beam remains level and the stress is evenly distributed during the lifting process, thus preventing structural damage.

[0010] However, current synchronous jacking requires a professional hydraulic synchronous control system and equipment, which involves a large investment; it cannot monitor the level and spacing of the pressure surface in real time, nor can it automatically adjust the positioning, which leads to high requirements for the technical level of the design and construction team, requiring accurate calculations and rich experience. Summary of the Invention

[0011] The technical problem that this invention aims to solve is that current synchronous jacking requires a professional hydraulic synchronous control system and equipment, which involves a large investment; it is impossible to monitor the level and spacing of the pressure surface in real time, and it is impossible to automatically adjust the positioning, which leads to high requirements for the technical level of the design and construction team, requiring accurate calculations and rich experience.

[0012] The technical solution adopted by the present invention to solve its technical problem is: a self-stabilizing multi-point bridge jacking device, including a mounting base, a bottom mounting cylinder with a lower opening welded and fixed on the outer side of the mounting base, a main hydraulic jacking rod inserted into the upper opening of the mounting base, a secondary hydraulic stabilizing jacking rod inserted into the lower opening of the bottom mounting cylinder, an embedded bottom detection plate installed on the lower surface of the mounting base, and a bottom-mounted electronic level movably installed inside the embedded bottom detection plate.

[0013] The extended end of the main hydraulic push rod is axially fitted with a top connecting seat, and the top of the top connecting seat is axially fixed with an integral top connecting ball.

[0014] The outer side of the top connecting ball is fitted with a top support frame, and a top-mounted electronic level is installed on the upper surface of the top support frame.

[0015] An embedded assembly frame is installed on the lower surface of the mounting base, and the embedded bottom detection plate is movably inserted into the embedded assembly frame and movably connected to the mounting base.

[0016] The extended ends of the auxiliary hydraulic stabilizing top rods are all axially fixed with end compression seats.

[0017] Anti-slip positioning blocks are provided on the connecting surfaces of the top support frame and the end extrusion seat.

[0018] An embedded terminal block is installed on the outer surface of the mounting base, and an external synchronous information transmission line is installed on the outer side of the embedded terminal block.

[0019] The installation position of the top connector and the outer support arm of the top support frame are staggered.

[0020] The top optical ranging module is axially fixed on the upper surface of the bottom mounting cylinder.

[0021] The lower end of the top support frame is provided with a spherical assembly groove that mates with the top connecting ball, and an embedded lifting spring is installed on the outer side of the top connecting seat at the connecting end of the top connecting ball.

[0022] The beneficial effects of this invention are: (1) The self-stabilizing multi-point bridge jacking device of the present invention sets a bottom electronic level on the embedded bottom detection plate on the lower surface of the mounting base and a top electronic level on the upper surface of the top support frame to monitor the levelness of the base and the support surface respectively, thereby monitoring the angle change of the jacking surface in real time, and accurately transmitting the data to the control computer for convenient synchronous control and more convenient operation. (2) By inserting a main hydraulic jack into the upper opening of the mounting base and an auxiliary hydraulic stabilizing jack into the lower opening of the bottom mounting cylinder, not only can the lifting stroke be increased, but the angle can also be adjusted as needed. With independent control, the operation is more diverse and the application range is wider. (3) A top connecting seat is axially assembled at the extended end of the main hydraulic jack, and an integral top connecting ball is axially fixed at the top of the top connecting seat. The top support frame is movably mounted on the outside of the top connecting ball, and the top support frame is used to fit the ground of the bridge, resulting in a better fit and greater stability. (4) By installing embedded terminals on the outer side of the mounting base and external synchronous information transmission lines on the outer side of the embedded terminals, information of the lifting devices at different positions can be synchronized, thereby ensuring the efficiency of information acquisition and facilitating control. Attached Figure Description

[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0024] Figure 1 This is a schematic diagram of the structure of the present invention.

[0025] Figure 2 This is a schematic diagram of the structure after the top support frame and external synchronous information transmission line have been removed in this invention.

[0026] Figure 3 This is a bottom view of the present invention.

[0027] In the diagram: 1. Mounting base; 2. Bottom mounting cylinder; 3. Main hydraulic jack; 4. Auxiliary hydraulic stabilizing jack; 5. Embedded bottom detection plate; 6. Bottom-mounted electronic level; 7. Top connecting seat; 8. Top connecting ball; 9. Top support frame; 10. Top-mounted electronic level; 11. Embedded assembly frame; 12. End pressing seat; 13. Anti-slip positioning block; 14. Embedded wiring terminal; 15. External synchronous information transmission line; 16. Top optical ranging module; 17. Embedded lifting spring. Detailed Implementation

[0028] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the invention, and therefore only show the components relevant to the invention.

[0029] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0030] Figure 1 , Figure 2 and Figure 3 The self-stabilizing multi-point bridge jacking device shown includes a mounting base 1, a bottom mounting cylinder 2 with a lower opening welded to the outer side of the mounting base 1, a main hydraulic jacking rod 3 inserted into the upper opening of the mounting base 1, a secondary hydraulic stabilizing jacking rod 4 inserted into the lower opening of the bottom mounting cylinder 2, an embedded bottom detection plate 5 mounted on the lower surface of the mounting base 1, and a bottom-mounted electronic level 6 movably mounted inside the embedded bottom detection plate 5.

[0031] To accommodate top mounting and multiple adjustments, the extended end of the main hydraulic jack 3 is axially fitted with a top connecting seat 7, and the top of the top connecting seat 7 is axially fixed with an integral top connecting ball 8.

[0032] In order to monitor the angle of the top lifting surface in real time, a top support frame 9 is movably fitted on the outside of the top connecting ball 8, and a top electronic level 10 is installed on the upper surface of the top support frame 9.

[0033] A push-button switch is installed at the top of the top electronic level 10. When the upper surface of the top support frame 9 is pressed against the bridge lifting surface, it will press the push-button switch, thereby activating the top electronic level 10 and reducing the range. An outer support arm is provided on the outside of the top support frame 9 to increase the lifting area.

[0034] To facilitate the bottom movable assembly, an embedded assembly frame 11 is installed on the lower surface of the mounting base 1, and the embedded bottom detection plate 5 is movably inserted into the embedded assembly frame 11 and movably connected to the mounting base 1.

[0035] To improve the stability of the bottom support, the extended ends of the auxiliary hydraulic stabilizing top rods 4 are axially fixed with end compression seats 12.

[0036] To improve the anti-slip properties of the connecting surfaces, anti-slip positioning blocks 13 are provided on the connecting surfaces of the top support frame 9 and the end compression seat 12.

[0037] The anti-slip positioning block 13 adopts a conical structure design, which ensures the anti-slip properties of the top support frame 9 and the end compression seat 12 by inserting it into the bottom support surface and the top lifting surface.

[0038] To facilitate the transmission of synchronous signals, an embedded terminal block 14 is installed on the outer side of the mounting base 1, and an external synchronous information transmission line 15 is installed on the outer side of the embedded terminal block 14.

[0039] In order not to affect the monitoring and positioning, the installation position of the top connector 7 and the outer support arm of the top support frame 9 are staggered.

[0040] In order to monitor the distance between the bottom mounting cylinder 2 and the upper bridge in real time, the top optical ranging module 16 is axially fixed on the upper surface of the bottom mounting cylinder 2.

[0041] To facilitate elastic compression and reset, the lower end of the top support frame 9 is provided with a spherical assembly groove that mates with the top connecting ball 8, and an embedded lifting spring 17 is installed on the outer side of the top connecting seat 7 at the connecting end of the top connecting ball 8.

[0042] A lateral sliding groove is provided on the outer surface of the top connecting seat 7. An embedded lifting spring 17 is installed inside the lateral sliding groove. One end of the embedded lifting probe 17 is inserted into the lateral sliding groove and connected to the top connecting seat 7. The other end of the embedded lifting probe 17 is bent upward and contacts the ground of the top support frame 9. The top support frame 9 is elastically reset by using multi-point support at the bottom.

[0043] I. Equipment Operating Principle This equipment achieves self-stabilizing control during the bridge jacking process through a linkage mechanism of "dual-end horizontal monitoring + main and auxiliary hydraulic coordinated adjustment + synchronous information transmission". The core principle revolves around three major modules: horizontal monitoring, jacking execution, and stability adaptation, as detailed below: Dual-end horizontal real-time monitoring Base end monitoring: The embedded bottom detection plate 5 on the lower surface of the mounting base 1 contains a bottom-mounted electronic level 6, which can collect the horizontal angle data after the mounting base 1 contacts the ground in real time, determine whether the bottom of the equipment is tilted, and avoid lifting deviation due to unstable base; the embedded bottom detection plate 5 is connected to the mounting base 1 through the movable insertion embedded assembly frame 11 to ensure the flexibility of the bottom-mounted electronic level 6 in detecting the angle.

[0044] Top-end monitoring: The top-mounted electronic level 10 installed on the upper surface of the top support frame 9 can directly collect the horizontal data of the bridge jacking surface; the top-mounted electronic level 10 is equipped with a push switch. When the upper surface of the top support frame 9 is pressed against the bridge jacking surface, the push switch is triggered to start, which reduces energy consumption in non-working state and can accurately capture the angle change of the bridge surface during the jacking process.

[0045] Spacing auxiliary monitoring: The top optical ranging module 16 on the upper surface of the bottom mounting cylinder 2 measures the distance between the bottom mounting cylinder 2 and the bottom of the bridge in real time, which helps to determine whether the lifting height of each lifting point is consistent, and avoids local over-lifting or under-lifting.

[0046] Main and auxiliary hydraulic coordinated lifting and stabilization adjustment Main lifting mechanism: The main hydraulic jacking rod 3 inside the opening at the upper end of the mounting base 1 is the core lifting component. It pushes the top connecting seat 7 and the top connecting ball 8 upward through axial extension and retraction, thereby driving the top support frame 9 to lift the bridge. The top connecting ball 8 and the spherical assembly groove at the lower end of the top support frame 9 can be movably matched to adapt to the slight tilt angle of the bottom of the bridge, ensuring the fit between the top support frame 9 and the bridge surface and avoiding local stress concentration.

[0047] Auxiliary stabilization adjustment: The auxiliary hydraulic stabilizing top rod 4 inside the lower opening of the bottom mounting cylinder 2 is an adjustment component. Its extended end pressing seat 12 can contact the ground or supporting foundation. When the bottom electronic level 6 detects that the base is tilted, the auxiliary hydraulic stabilizing top rod 4 can adjust its length independently by telescoping and pressing against the ground to correct the horizontal state of the mounting base 1. At the same time, the anti-slip positioning block 13 (conical structure) on the connection surface between the end pressing seat 12 and the top support frame 9 can be inserted into the contact surface to enhance friction and prevent slippage and displacement during the lifting process.

[0048] Elastic reset adapter: One end of the embedded lifting spring 17 on the outer side of the top connecting seat 7 is embedded in the lateral sliding groove of the top connecting seat 7, and the other end is bent upward to contact the bottom surface of the top support frame 9; when the top support frame 9 rotates slightly due to the change of bridge surface angle, the embedded lifting spring 17 can assist the top support frame 9 to reset through elastic deformation, and maintain the stability of the fit with the bridge surface.

[0049] The embedded wiring terminal 14 on the outer side of the multi-point synchronous information transmission and control mounting base 1 connects to the external synchronous information transmission line 15, which can synchronously transmit the data of the bottom electronic level 6, the top electronic level 10, and the top optical distance measuring module 16 of multiple lifting devices to the central control terminal. The central control terminal adjusts the lifting speed of the corresponding main hydraulic jack 3 and the extension length of the auxiliary hydraulic stabilizing jack 4 according to the real-time data of each device, so as to ensure synchronous and equal lifting of multiple lifting points and avoid structural damage to the bridge due to uneven stress. In addition, the staggered layout of the top connecting seat 7 and the outer support arm of the top support frame 9 can avoid component interference and does not affect the monitoring accuracy of the level and distance measuring module.

[0050] II. Equipment Operation Process (I) Preliminary Preparation Stage Site and component inspection Clear the area below the bridge jacking point to ensure the ground is flat and free of debris; check whether the core components such as the mounting base 1, main hydraulic jacking rod 3, and auxiliary hydraulic stabilizing jacking rod 4 are intact and free from deformation or oil leakage; confirm that the bottom electronic level 6, top electronic level 10, and top optical distance measuring module 16 can work normally after being powered on.

[0051] Based on the bridge jacking requirements, determine the number and spacing of multi-point jacking devices to ensure that each device covers the main load-bearing parts of the bridge and avoids local overload.

[0052] (II) Equipment Assembly Stage Base and bottom side components assembly Place the mounting base 1 on a flat surface at the preset lifting point, and insert the embedded bottom detection plate 5 into the embedded assembly frame 11 on the lower surface of the mounting base 1 to ensure that the bottom electronic level 6 is in a horizontal initial state; weld and fix the bottom mounting cylinder 2 to the outer side of the mounting base 1 to ensure that the lower opening of the bottom mounting cylinder 2 is vertically downward.

[0053] Insert the auxiliary hydraulic stabilizing rod 4 into the lower opening of the bottom mounting cylinder 2, and axially fix the end pressing seat 12 to the protruding end of the auxiliary hydraulic stabilizing rod 4, ensuring that the anti-slip positioning block 13 of the end pressing seat 12 faces the ground.

[0054] Assembly of main lifting components with top frame Insert the main hydraulic jack 3 into the opening at the upper end of the mounting base 1, axially assemble the top connecting seat 7 at the extended end of the main hydraulic jack 3, and ensure that the top connecting seat 7 is coaxial with the main hydraulic jack 3; align the top connecting ball 8 (which is an integral structure with the top connecting seat 7) with the spherical mounting groove at the lower end of the top support frame 9, and movably fit the top support frame 9 onto the outside of the top connecting ball 8.

[0055] Install the embedded lifting spring 17 in the side slide groove of the top connecting seat 7, adjust the angle of the spring so that its upper end contacts the bottom surface of the top support frame 9, and ensure that the spring has elastic reset capability; check that the top electronic level 10 on the upper surface of the top support frame 9 is firmly installed and that the switch can be triggered normally when pressed.

[0056] Synchronous information line connection Connect one end of the external synchronous information transmission line 15 to the embedded terminal 14 on the outer side of the mounting base 1, and the other end to the central control terminal; test the signal transmission between each device and the central control terminal one by one to ensure that the data of the bottom electronic level 6, the top electronic level 10, and the top optical distance measuring module 16 can be uploaded to the control terminal in real time.

[0057] (III) Debugging Phase Horizontal and fit adjustment Start the bottom electronic level 6 and observe the level data of the mounting base 1; if there is tilt, adjust the support height of the end pressing seat 12 by controlling the extension and retraction of the auxiliary hydraulic stabilizing rod 4 until the bottom electronic level 6 shows that the base is level (error ≤ 0.1°).

[0058] Slowly extend the main hydraulic jack 3 so that the upper surface of the top support frame 9 fits against the bottom of the bridge, triggering the push switch of the top electronic level 10; observe the data of the top electronic level 10. If the bridge surface is tilted, the top support frame 9 will adaptively adjust its angle through the movable cooperation between the top connecting ball 8 and the spherical assembly groove until the top electronic level 10 shows that the fitting surface is level.

[0059] Synchronous Lifting Parameter Settings The lifting speed (initial speed ≤ 5 mm / min), maximum lifting height (set according to the clearance requirements under the bridge), and horizontal deviation threshold (≤ 0.2°) of each device are set through the central control terminal; the spacing monitoring function of the top optical ranging module 16 is tested to ensure that the ranging data of each device is consistent with the actual spacing, and if there is a deviation, calibration is performed.

[0060] (iv) Formal lifting stage Synchronous lifting execution The synchronous lifting program of the central control terminal is started. The main hydraulic jacking rods 3 of each device extend synchronously at a preset speed, pushing the top support frame 9 to lift the bridge. During the process, the data of the bottom electronic level 6, the top electronic level 10 and the distance data of the top optical ranging module 16 are monitored in real time on the control terminal.

[0061] If a device detects a horizontal deviation exceeding a threshold (such as a base tilt or a bridge deck tilt), the central control unit automatically adjusts the extension and retraction of the auxiliary hydraulic stabilizing jack 4 of that device (to correct the base level) or adjusts the extension speed of the main hydraulic jack 3 (to correct the lifting height) until the deviation returns to within the threshold. If multiple devices have deviations, the control unit synchronously corrects them according to the logic of "first calibrating the level, then adjusting the height".

[0062] Inspection of the lifting process Personnel are assigned to inspect the operating status of each device every 10 minutes, with a focus on checking for oil leakage of the main and auxiliary hydraulic jacks, the fit stability of the anti-slip positioning block 13, and the connection reliability of the external synchronous information transmission line 15. If any abnormality is found in a component (such as oil leakage or loose wiring), the jacking of that device is immediately suspended through the control terminal, and synchronous operation is resumed after the fault is dealt with.

[0063] (v) Shutdown and Maintenance Phase Lift in position and stop When the top optical ranging module 16 detects that the lifting height of each device has reached the preset value and the overall levelness of the bridge meets the requirements (the data of the top electronic level 10 are all within the qualified range), the extension speed of the main hydraulic jacking rod 3 is gradually reduced through the central control terminal until it stops completely; the current length of the main and auxiliary hydraulic jacking rods is maintained to maintain the stable state of the bridge after lifting (such as when the support needs to be replaced).

[0064] Equipment disassembly and maintenance After the bridge-related work (such as bearing replacement and clearance adjustment) is completed, the main hydraulic jack 3 is retracted synchronously through the control terminal to detach the top support frame 9 from the bottom of the bridge; then the auxiliary hydraulic stabilizing jack 4 is retracted, the embedded bottom detection plate 5 is removed, and the external synchronous information transmission line 15 is disconnected.

[0065] Clean the dust and oil from the surfaces of all components, check if the seals of the hydraulic jack are aged, and check if the sensors of the level and distance measuring module are intact; apply anti-rust oil to the embedded lifting spring 17, and store all components in a dry and ventilated place for future use. Based on the above-described preferred embodiments of the present invention, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the inventive concept. The technical scope of this invention is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A self-stabilizing multi-point bridge jacking device comprising a mounting base (1), characterized in that: The outer side of the mounting base (1) is welded with a bottom-side mounting cylinder (2) with an open lower end, a main hydraulic jack (3) is inserted into the open upper end of the mounting base (1), a vice hydraulic stabilizing jack (4) is inserted into the open lower end of the bottom-side mounting cylinder (2), an embedded bottom detection disc (5) is mounted on the lower surface of the mounting base (1), and a bottom electronic level (6) is movably mounted in the embedded bottom detection disc (5).

2. The self-stable multi-point bridge jacking device according to claim 1, characterized in that: The extending end of the main hydraulic jack (3) is axially provided with a top connecting seat (7), and the top of the top connecting seat (7) is axially fixed with a top connecting ball (8) of integral structure.

3. The self-stabilizing multi-point bridge jacking device of claim 2, wherein: The outer side of the top connecting ball (8) is movably sleeved with a top supporting frame (9), and a top electronic level (10) is mounted on the upper surface of the top supporting frame (9).

4. The self-stabilizing multi-point bridge jacking apparatus of claim 1, wherein: The lower surface of the mounting base (1) is mounted with an embedded assembly frame (11), and the embedded bottom detection disc (5) is movably inserted into the embedded assembly frame (11) and movably connected with the mounting base (1).

5. The self-stabilizing multi-point bridge jacking apparatus of claim 4, wherein: The extending end of the vice hydraulic stabilizing jack (4) is axially fixed with an end extrusion seat (12).

6. The self-stabilizing multi-point bridge jacking apparatus of claim 3, wherein: The connecting surface of the top supporting frame (9) and the end extrusion seat (12) is provided with an anti-skid positioning block (13).

7. The self-stabilizing multi-point bridge jacking apparatus of claim 1, wherein: The outer side of the mounting base (1) is mounted with an embedded wiring terminal (14), and the outer side of the embedded wiring terminal (14) is mounted with an external synchronous information transmission line (15).

8. The self-stable multi-point bridge jacking device according to claim 3, wherein: The mounting position of the top connecting seat (7) and the outer side supporting arm of the top supporting frame (9) are staggered.

9. The self-stabilizing multi-point bridge jacking apparatus of claim 1, wherein: The upper surface of the bottom-side mounting cylinder (2) is axially fixed with a top optical distance measuring module (16).

10. The self-stable multi-point bridge jacking device according to claim 3, wherein: The lower end of the top supporting frame (9) is provided with a spherical assembly groove matched with the top connecting ball (8), and the outer side of the top connecting seat (7) is mounted with an embedded lifting spring piece (17) at the connecting end of the top connecting ball (8).

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