A synchronous jacking device for rapid replacement of bridge supports

Abstract

This invention proposes a synchronous jacking device for rapid replacement of bridge bearings, comprising two mounting frames, two adjusting frames, a jack, and a pitch adjustment mechanism. The two mounting frames are symmetrically fixed to the bridge piers laterally. The two adjusting frames are rotatably mounted on the two mounting frames about a transverse axis, each adjusting frame having an mounting platform. The jack is mounted on the mounting platform of the adjusting frame. The pitch adjustment mechanism is used to adjust the pitch angle of the adjusting frame relative to the mounting frame. This invention, by rotatably mounting the adjusting frame on the mounting frame and providing a pitch adjustment mechanism for adjusting the pitch angle of the adjusting frame, allows the jacking surface angle of the jack mounted on the adjusting frame to be adjustable. This makes it suitable for adaptive adjustment according to the beam bottom angle of different bridges, eliminating the need for individually designing and processing wedge-shaped pads for each bridge. This improves the versatility and adaptability of the jacking device.

Description

Technical Field

[0001] This invention relates to the field of bridge bearing replacement technology, and in particular to a synchronous jacking device for rapid replacement of bridge bearings. Background Technology

[0002] During bridge bearing replacement, a lifting platform is typically installed on the pier, and hydraulic jacks are then placed on the platform to lift the bridge beam. For bridges with curved or variable cross-section bottom surfaces, such as box girders and fish-belly girders, there is often an angle between the bottom of the beam and the horizontal plane. To ensure good contact between the lifting surface of the jacks and the bottom of the beam, it is usually necessary to pre-design corresponding wedge-shaped pads based on the specific angle of the bridge beam bottom, and place them between the top of the jacks and the bottom of the beam.

[0003] However, for bridges with different structures, the angle of the bottom of the beams varies, requiring the redesign and fabrication of corresponding wedge-shaped pads for each construction phase, increasing the complexity and cost of construction preparation. Furthermore, once the wedge-shaped pads are fabricated, their angle is fixed and cannot be adjusted according to the actual site conditions. When fine adjustments are needed based on the beam's posture during construction, the existing wedge-shaped pads are difficult to adapt, causing numerous inconveniences to on-site construction. Summary of the Invention

[0004] In view of this, the present invention provides a synchronous jacking device for rapid replacement of bridge bearings, which aims to improve the adaptability of the jacking device to different beam bottom profiles.

[0005] The technical solution of this invention is implemented as follows:

[0006] A synchronous jacking device for rapid replacement of bridge bearings, comprising:

[0007] Two mounting brackets are symmetrically fixed to the bridge piers laterally;

[0008] Two adjusting brackets are rotatably mounted on the two mounting brackets about a transverse axis, and each adjusting bracket is provided with a mounting platform;

[0009] The jack is mounted on the installation platform of the adjustment frame;

[0010] A pitch adjustment mechanism is used to adjust the pitch angle of the adjustment frame relative to the mounting frame.

[0011] As a further optional solution, the pitch adjustment mechanism includes a slant brace cylinder, one end of which is hinged to the mounting frame and the other end of which is hinged to the adjustment frame.

[0012] As a further alternative, the mounting bracket includes a fixing plate and side plates extending from both sides of the fixing plate;

[0013] The fixing plate is provided with a plurality of first connecting holes, which are used to connect high-strength bolts. The fixing plate is fixed to the bridge pier by the high-strength bolts.

[0014] As a further optional solution, a vertical connecting plate is provided on the side plate away from the edge of the mounting plate, and the connecting plate is provided with a through second connecting hole;

[0015] The connecting plates on the two mounting brackets are opposite each other, and the second connecting holes on them are connected by tie bolts.

[0016] As a further alternative, the side plate is provided with a laterally extending pivot, and the adjustment frame is hinged to the pivot.

[0017] As a further optional solution, the outer sidewalls of the fixing plate and the side plate are provided with multiple horizontally extending reinforcing ribs, and the multiple reinforcing ribs are distributed at intervals along the vertical direction.

[0018] As a further alternative, the plurality of first connection holes on the fixing plate are distributed in a horizontal and vertical array.

[0019] As a further alternative, one end of the inclined support cylinder is hinged to the fixed plate, and the other end is hinged to the adjusting frame.

[0020] As a further optional solution, multiple inclined support cylinders are provided between the fixed plate and the adjusting frame.

[0021] As a further optional solution, at least three diagonal bracing cylinders are provided between the fixing plate and the adjusting frame.

[0022] Compared with the prior art, the present invention has the following technical effects:

[0023] This invention features a rotatable adjustment frame mounted on a mounting frame, along with a pitch adjustment mechanism for adjusting the pitch angle of the frame. This allows for adjustable jacking surface angles, making it suitable for adaptive adjustments based on the beam bottom angles of different bridges, eliminating the need for individually designed and manufactured wedge-shaped pads for each bridge. This improves the versatility and adaptability of the lifting device. Furthermore, because the tilt angle of the mounting platform can be adjusted in real-time according to the actual beam bottom angle, a good fit can be formed between the jacking surface and the beam bottom, improving the uniformity of lifting force transmission and reducing the risk of beam bottom damage due to localized stress concentration. Attached Figure Description

[0024] Figure 1 This is one of the application schematic diagrams of a synchronous jacking device for rapid replacement of bridge bearings in one embodiment of the present invention;

[0025] Figure 2 This is a schematic diagram of a synchronous jacking device for rapid replacement of bridge bearings according to an embodiment of the present invention (the jack is hidden).

[0026] Figure 3 This is an exploded schematic diagram of a synchronous jacking device for rapid replacement of bridge bearings according to an embodiment of the present invention (the jacks are hidden).

[0027] Figure 4 This is a schematic diagram of the mounting bracket in one embodiment of the present invention;

[0028] Figure 5 This is a schematic diagram of the connection structure of two mounting brackets fixed to a bridge pier in one embodiment of the present invention;

[0029] Figure 6 This is the second application schematic diagram of a synchronous jacking device for rapid replacement of bridge bearings in one embodiment of the present invention.

[0030] In the diagram: 100, bridge pier; 200, bridge beam; 300, bridge bearing;

[0031] 1. Mounting bracket; 11. Fixing plate; 111. First connecting hole; 12. Side plate; 121. Rotating shaft; 13. Connecting plate; 131. Second connecting hole; 14. Reinforcing rib;

[0032] 2. Adjustment frame; 21. Installation platform;

[0033] 3. Pitch adjustment mechanism;

[0034] 4. Jack;

[0035] 5. High-strength bolts;

[0036] 6. Tie bolts. Detailed Implementation

[0037] The following examples are used to illustrate the present invention, but are not intended to limit the scope of the invention.

[0038] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "vertical", "horizontal", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0039] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0040] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0041] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples.

[0042] refer to Figures 1 to 6 An embodiment of the present invention illustrates a synchronous jacking device for rapid replacement of bridge bearings, comprising two mounting frames 1, two adjusting frames 2, a jack 4, and a pitch adjustment mechanism 3; the two mounting frames 1 are symmetrically fixed to the bridge pier 100 in a transverse direction; the two adjusting frames 2 are rotatably mounted on the two mounting frames 1 respectively around a transverse axis, and the adjusting frames 2 are provided with mounting platforms 21; the jack 4 is mounted on the mounting platforms 21 of the adjusting frames 2; the pitch adjustment mechanism 3 is used to adjust the pitch angle of the adjusting frames 2 relative to the mounting frames 1.

[0043] Specifically, two mounting frames 1 are symmetrically fixed laterally on both sides of the pier 100. The mounting frames 1 are steel structural components and can be fixedly connected to the pier 100 by high-strength bolts 5, tie bolts 6, or anchor bolts, providing an installation foundation for the adjusting frame 2 and the pitch adjustment mechanism 3. Two adjusting frames 2 are respectively mounted on the two mounting frames 1. Each adjusting frame 2 can rotate relative to its corresponding mounting frame 1 around a transverse axis, which is the axis extending along the length of the bridge. The adjusting frame 2 is equipped with an installation platform 21 for installing jacks 4. The adjusting frame 2 is made of a steel structural frame or plates. The jacks 4 are mounted on the installation platform 21 of the adjusting frame 2. Their number and arrangement can be determined according to the actual width and load requirements of the bridge; typically, one or more jacks 4 can be installed on each adjusting frame 2. The pitch adjustment mechanism 3 is located between the mounting frame 1 and the adjustment frame 2, and is used to drive the adjustment frame 2 to rotate relative to the mounting frame 1 around the transverse axis, thereby changing the pitch angle of the adjustment frame 2. When the adjustment frame 2 rotates, the mounting platform 21 and the jack 4 mounted on the mounting platform 21 rotate together with the adjustment frame 2, thereby adjusting the lifting angle of the jack 4. Here, the pitch angle refers to the tilt angle of the adjustment frame 2 and the mounting platform 21 relative to the horizontal plane. The bridge bearing 300 is located between the pier 100 and the beam 200. During the lifting operation, the jack 4 acts on the bottom of the beam 200.

[0044] During construction, firstly, two mounting frames 1 are symmetrically fixed laterally to both sides of the pier 100. The fixing position of the mounting frames 1 should be determined according to the position of the bridge bearing 300 and the lifting height, and is usually set in the top area of ​​the pier 100. After the mounting frames 1 are fixed, the adjusting frame 2 and the pitch adjusting mechanism 3 are installed on the mounting frames 1, and the jack 4 is installed on the mounting platform 21 of the adjusting frame 2. At this time, the mounting platform 21 is in the initial angle (e.g., horizontal). Subsequently, according to the actual angle of the bottom of the beam 200 of the bridge to be constructed, the adjusting frame 2 is driven to rotate around the transverse axis by the pitch adjusting mechanism 3. When the adjusting frame 2 rotates, the mounting platform 21 and the jack 4 rotate accordingly until the lifting surface of the jack 4 matches the tilt angle of the bottom of the beam 200. After the angle adjustment is completed, the pitch adjusting mechanism 3 is locked or the adjusting frame 2 is held at the current angle by other locking structures. Finally, jack 4 is started to carry out the lifting operation. Since the lifting surface of jack 4 has been pre-adjusted to match the angle of the bottom of beam 200, a good surface contact can be formed between the lifting surface of jack 4 and the bottom of beam 200, and the lifting force can be evenly transmitted to beam 200.

[0045] Thus, in this embodiment, by rotatably mounting the adjustment frame 2 on the mounting frame 1 and providing a pitch adjustment mechanism 3 for driving the adjustment frame 2 to rotate relative to the mounting frame 1, the lifting surface angle of the jack 4 mounted on the adjustment frame 2 is adjustable. Based on the angle differences at the bottom of different beams 200, the pitch angle of the adjustment frame 2 can be adjusted simply by using the pitch adjustment mechanism 3 to ensure a good fit between the lifting surface of the jack 4 and the bottom of the beam 200. This eliminates the need for separate design and fabrication of wedge-shaped pads for each bridge, thereby improving the versatility and adaptability of the lifting device and reducing pre-construction preparation work and costs. Simultaneously, since the lifting surface of the jack 4 can be adjusted according to the actual bottom angle of the beam 200, a good fit can be formed between the lifting surface of the jack 4 and the bottom of the beam 200, which helps improve the uniformity of the lifting force transmission and reduces the risk of damage to the bottom of the beam 200 due to localized stress concentration.

[0046] It should be noted that the synchronous lifting device in this embodiment can be used for beams 200 with flat bottoms as well as beams 200 with inclined bottoms. For beams 200 with flat bottoms, it is sufficient to keep the mounting platform 21 horizontal.

[0047] In some embodiments, reference Figure 2 or Figure 3 The pitch adjustment mechanism 3 includes a slant support cylinder, one end of which is hinged to the mounting frame 1 and the other end is hinged to the adjustment frame 2.

[0048] Specifically, the inclined support cylinder is an inclined hydraulic cylinder, with its lower end hinged to the mounting bracket 1 and its higher end hinged to the adjusting bracket 2. The inclined support cylinder, as the actuator driving the adjusting bracket 2 to rotate relative to the mounting bracket 1, includes a cylinder body and a piston rod. One end of the cylinder body is hinged to the mounting bracket 1, and the extended end of the piston rod is hinged to the adjusting bracket 2; alternatively, one end of the piston rod is hinged to the mounting bracket 1, and one end of the cylinder body is hinged to the adjusting bracket 2. These two configurations can be reversed, as long as the cylinder can push the adjusting bracket 2 to rotate around its transverse axis during extension and retraction.

[0049] By controlling the extension and retraction of the inclined support cylinder, the adjusting frame 2 can be adjusted to the desired angle. The inclined support cylinder is equipped with a hydraulic lock; after angle adjustment, the cylinder is locked using the hydraulic lock, maintaining the adjusting frame 2 at the current angle. Using the inclined support cylinder as the pitch adjustment mechanism 3 offers advantages such as high adjustment precision, large driving force, simple operation, and remote control capability. Furthermore, the hydraulic cylinder provides stable support force in the locked state, which helps improve the safety of the lifting operation.

[0050] In some embodiments, reference Figure 4The mounting bracket 1 includes a fixing plate 11 and side plates 12 extending from both sides of the fixing plate 11; the fixing plate 11 is provided with a plurality of first connecting holes 111, the first connecting holes 111 are used to connect high-strength bolts 5, and the fixing plate 11 is fixed to the bridge pier 100 by the high-strength bolts 5.

[0051] In this embodiment, the mounting frame 1 has a C-shaped or U-shaped structure, including a fixing plate 11 and two side plates 12. The two side plates 12 extend out from the two sides of the fixing plate 11 in the same direction. The fixing plate 11 is a flat plate structure, and its side opposite to the outer wall of the pier 100 is attached to the pier 100. During installation, the fixing plate 11 is arranged along the height direction of the pier 100. The fixing plate 11 has multiple first connecting holes 111, which are spaced apart along the plane of the fixing plate 11. During installation, holes are drilled at corresponding positions on the pier 100 and high-strength bolts 5 are inserted. One end of the high-strength bolt 5 is anchored inside the pier 100, and the other end passes through the first connecting hole 111 on the fixing plate 11 and protrudes out of the outside of the fixing plate 11. The bolts are then tightened by screwing in nuts, thereby anchoring the fixing plate 11 to the outer wall of the pier 100. The two side plates 12 are arranged parallel and opposite to each other, providing installation space and connection positions for the adjusting frame 2 and the inclined support cylinder. The fixing plate 11 and the side plate 12 can be connected by welding or by integral molding. The mounting frame 1 in this embodiment has a simple structure. It is fixedly connected to the pier 100 by high-strength bolts 5 anchored by rebar, without the need for complex pre-embedded parts on the pier 100. Moreover, the mounting frame 1 can be removed as a whole by simply removing the nuts, which facilitates quick dismantling and reuse after construction.

[0052] In some embodiments, reference Figure 4 and Figure 5 The side plate 12 has a vertical connecting plate 13 on its edge away from the mounting plate, and the connecting plate 13 has a through second connecting hole 131; the connecting plates 13 on the two mounting brackets 1 are opposite to each other, and the second connecting holes 131 on them are connected by tie bolts 6.

[0053] Specifically, the connecting plate 13 is located at the edge of the side plate 12, that is, at the end of the side plate 12 away from the fixing plate 11. The connecting plate 13 is perpendicular to the side plate 12, and its surface is parallel to the surface of the fixing plate 11. The connecting plate 13 and the side plate 12 can be connected by welding or integral molding. The connecting plate 13 has a second connecting hole 131 that penetrates its thickness, and the second connecting hole 131 is used to pass through the tie bolt 6. After the two mounting brackets 1 are symmetrically fixed to both sides of the pier 100 laterally, the connecting plates 13 on the two mounting brackets 1 are positioned opposite each other, that is, the connecting plate 13 of the left mounting bracket 1 and the connecting plate 13 of the right mounting bracket 1 are directly opposite each other in the transverse direction of the bridge, and the second connecting holes 131 on the two connecting plates 13 are also directly opposite each other. After the tie bolt 6 passes through the second connecting holes 131 on the two connecting plates 13, it is locked at both ends by nuts, thereby connecting the two mounting brackets 1 into one unit.

[0054] In this embodiment, by setting up a connecting plate 13 and connecting them with tie rods, the two mounting frames 1 not only remain stable under their fixed connection to the bridge pier 100, but are also connected to each other by tie rods 6 in the transverse direction, forming an overall frame structure surrounding the bridge pier 100. This tie rod connection method can effectively restrain the tendency of the two mounting frames 1 to expand outward or shift relative to each other during the jacking process, improving the lateral stiffness and overall stability of the entire device. At the same time, the tie rod 6 connection structure is simple and easy to install and disassemble. Combined with the connection method of the mounting frames 1 to the bridge pier 100 via high-strength bolts 5, the entire device can be quickly disassembled after construction, facilitating reuse.

[0055] In some embodiments, reference Figure 4 The side plate 12 has a laterally extending pivot 121 on its outer side, and the adjustment frame 2 is hinged to the pivot 121.

[0056] The rotating shaft 121 can be directly fixed to the outer wall of the side plate 12, for example, by welding or integral molding. The rotating shaft 121 protrudes from the outer wall of the side plate 12, and the adjusting frame 2 is sleeved on the rotating shaft 121, which can rotate freely around the rotating shaft 121. The hinged connection between the adjusting frame 2 and the rotating shaft 121 can be achieved by bearings or bushings.

[0057] In some embodiments, reference Figure 4 The outer side walls of the fixing plate 11 and the side plate 12 are provided with multiple horizontally extending reinforcing ribs 14, and the multiple reinforcing ribs 14 are distributed vertically at intervals.

[0058] Specifically, reinforcing ribs 14 are provided on the outer walls of the mounting frame 1, namely the outer wall surface of the fixing plate 11 and the outer wall surface of the side plate 12. By providing transversely extending reinforcing ribs 14 on the outer walls of the fixing plate 11 and the side plate 12, the relative deformation of the fixing plate 11 and the side plate 12 under stress can be effectively constrained, the bending stiffness and torsional stiffness between the fixing plate 11 and the side plate 12 can be enhanced, and the mounting frame 1 can be prevented from local instability or excessive deformation when subjected to large loads.

[0059] In some embodiments, reference Figure 1 , Figure 4 and Figure 5 The first connecting holes 111 on the fixing plate 11 are arranged in a horizontal and vertical array. In this way, by arranging the first connecting holes 111 in a horizontal and vertical array, the anchoring points of the fixing plate 11 on the pier 100 are evenly distributed, and the clamping force between the fixing plate 11 and the outer wall of the pier 100 is more balanced, which is beneficial to improving the reliability and stability of the anchoring.

[0060] In some embodiments, one end of the inclined support cylinder is hinged to the fixed plate 11, and the other end is hinged to the adjusting frame 2.

[0061] The mounting frame 1 includes a fixed plate 11 and a side plate 12. The fixed plate 11 is the main load-bearing plate that adheres to the outer wall of the pier 100. It is directly and fixedly connected to the pier 100 and is the most stable and rigid component in the entire device. One end of the diagonal brace cylinder is hinged to the fixed plate 11, so that the driving force of the diagonal brace cylinder acts directly on the fixed plate 11 without being transmitted through the side plate 12 or other intermediate components. The force path is short and direct, which helps to improve the transmission efficiency of the driving force and reduce energy loss and deformation in intermediate links. At the same time, since the fixed plate 11 is anchored to the outer wall of the pier 100 by multiple high-strength bolts 5, the connection between it and the pier 100 has high rigidity and stability. The reaction force generated when the diagonal brace cylinder is working can be directly transmitted to the pier 100 through the fixed plate 11.

[0062] In some embodiments, reference Figure 2 Multiple inclined support cylinders are provided between the fixed plate 11 and the adjusting frame 2.

[0063] The multiple inclined support cylinders are distributed in the lateral direction of the fixed plate 11 and the adjusting frame 2, which can make the driving force evenly applied at multiple positions of the adjusting frame 2, avoiding uneven force on the adjusting frame 2 caused by single-point driving, resulting in eccentric load or torsional deformation, which is beneficial to improving the smoothness of the adjusting frame 2 rotation process and the accuracy of angle control.

[0064] Preferably, at least three inclined support cylinders are provided between the fixing plate 11 and the adjusting frame 2.

[0065] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0066] To highlight the key technical aspects of this application, the specification and accompanying drawings omit or omit structural, step, or operational features not directly related to solving the technical problems of this application when describing the embodiments. Such omissions do not affect the understanding of the technical solution of this application by those skilled in the art, nor do they constitute a limitation on the embodiments. Those skilled in the art can supplement or replace relevant content based on conventional technical knowledge without affecting the completeness and feasibility of the technical solution of this application.

[0067] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A synchronous jacking device for rapid replacement of bridge bearings, characterized in that, include: Two mounting brackets are symmetrically fixed to the bridge piers laterally; Two adjusting brackets are rotatably mounted on the two mounting brackets about a transverse axis, and each adjusting bracket is provided with a mounting platform; The jack is mounted on the installation platform of the adjustment frame; A pitch adjustment mechanism is used to adjust the pitch angle of the adjustment frame relative to the mounting frame.

2. The synchronous jacking device for rapid replacement of bridge bearings according to claim 1, characterized in that: The pitch adjustment mechanism includes a slant brace cylinder, one end of which is hinged to the mounting frame and the other end of which is hinged to the adjustment frame.

3. The synchronous jacking device for rapid replacement of bridge bearings according to claim 2, characterized in that: The mounting bracket includes a fixed plate and side plates extending from both sides of the fixed plate; The fixing plate is provided with a plurality of first connecting holes, which are used to connect high-strength bolts. The fixing plate is fixed to the bridge pier by the high-strength bolts.

4. The synchronous jacking device for rapid replacement of bridge bearings according to claim 3, characterized in that: A vertical connecting plate is provided on the side plate away from the edge of the mounting plate, and a through second connecting hole is provided on the connecting plate; The connecting plates on the two mounting brackets are opposite each other, and the second connecting holes on them are connected by tie bolts.

5. The synchronous jacking device for rapid replacement of bridge bearings according to claim 3, characterized in that: The side plate has a laterally extending pivot, and the adjustment frame is hinged to the pivot.

6. The synchronous jacking device for rapid replacement of bridge bearings according to claim 3, characterized in that: The outer walls of the fixing plate and the side plate are provided with multiple horizontally extending reinforcing ribs, which are distributed at intervals along the vertical direction.

7. The synchronous jacking device for rapid replacement of bridge bearings according to claim 3, characterized in that: The multiple first connecting holes on the fixing plate are distributed in a horizontal and vertical array.

8. The synchronous jacking device for rapid replacement of bridge bearings according to claim 3, characterized in that: One end of the inclined support cylinder is hinged to the fixed plate, and the other end is hinged to the adjusting frame.

9. The synchronous jacking device for rapid replacement of bridge bearings according to claim 8, characterized in that: Multiple inclined support cylinders are provided between the fixed plate and the adjusting frame.

10. The synchronous jacking device for rapid replacement of bridge bearings according to claim 9, characterized in that: At least three diagonal bracing cylinders are provided between the fixed plate and the adjusting frame.

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