Large-curvature steel box girder floating jacking continuous operation device
By combining hydraulic jacking components and positioning and correction components, continuous operation and real-time correction of large curvature bridges were achieved, solving the accuracy and efficiency problems in construction and improving the construction quality of floating jacking of large curvature bridges.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 江西省德安县水利水电建筑工程公司
- Filing Date
- 2025-05-27
- Publication Date
- 2026-05-15
AI Technical Summary
The construction of floating bridges with large curvature faces challenges such as difficulty in controlling geometric nonlinearity, reliance on manual experience for correction, low efficiency of temporary support systems, and insufficient synchronization and continuity, resulting in insufficient construction accuracy and low efficiency.
The system employs a hydraulic jacking assembly, a floating support assembly, and a positioning and correction assembly. The vertical load-bearing sliding trolley is driven alternately by the front and rear jacking units to achieve continuous operation. Combined with the positioning and correction assembly, deviations are monitored in real time and alarms are issued to ensure the stable movement of the steel box girder.
This enabled continuous jacking of bridges with large curvature, improved construction efficiency, ensured the stability and precision of the steel box girder, and avoided lateral displacement and stress concentration.
Smart Images
Figure CN224243692U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of floating support and jacking construction technology for long-span bridges across waterways, specifically relating to a continuous operation device for floating support and jacking of large-curvature steel box girders. Background Technology
[0002] As bridge engineering develops towards longer spans and more complex alignments, the demand for bridges with large curvature (radius of curvature ≤ 1 / 60) is increasing, while the construction technology for these bridges faces greater challenges. The construction difficulty of long-span bridges increases significantly when crossing rivers. The floating jacking method, combining jacking devices and floating vessels, is an efficient and safe bridge erection technique, showing greater adaptability in crossing waterways or complex terrain, and is widely used in the erection of steel box girders.
[0003] Currently, floating-over launching construction faces many challenges in high-curvature scenarios. First, geometric nonlinear control is difficult. The alignment of high-curvature bridges changes significantly, leading to lateral shifts and stress concentrations in the beam during launching. Traditional correction methods rely on manual experience and lack real-time dynamic adjustment capabilities, resulting in insufficient accuracy. Second, temporary support systems are inefficient. Existing floating-over launching systems largely rely on temporary piers or floating pier systems, which have long installation cycles and are difficult to adapt to continuous launching requirements. Third, synchronization and continuity are insufficient. Uneven stress distribution at support points during multi-point launching can easily cause asynchrony problems. For example, poor jack synchronization in steel box girder launching can lead to localized stress exceeding limits. Excessive launching distance on curves can easily cause track jamming, and segmented launching requires frequent stops and adjustments, resulting in low construction efficiency. To address the shortcomings of current floating-over launching construction for high-curvature bridges, we urgently need a comprehensive operating device that can operate continuously, has a high degree of automation, and provides real-time optimization and automatic correction. Utility Model Content
[0004] In order to solve the above-mentioned problems in the existing technology, the purpose of this utility model is to provide a continuous operation device for floating support and jacking of large curvature steel box girders.
[0005] The technical solution adopted in this utility model includes:
[0006] The hydraulic jacking assembly includes a steel rail, a vertical load-bearing sliding trolley slidably connected to the steel rail, and a front jacking device and a rear jacking device connected to both ends of the vertical load-bearing sliding trolley; the top of the vertical load-bearing sliding trolley is used to support one end of the steel box girder, and the front jacking device and the rear jacking device are used to alternately drive the vertical load-bearing sliding trolley to slide along the steel rail;
[0007] The buoyancy assembly floats on the water surface, and its top serves as support for the other end of the steel box girder;
[0008] A positioning and correction component is connected to the rail and located on the side of the hydraulic jacking component away from the floating component. The positioning and correction component is used to issue an alarm after detecting deviation of the steel box girder's movement coordinates.
[0009] As a preferred embodiment of this utility model, the vertical load-bearing sliding trolley includes:
[0010] The flatbed cart body has rollers at the bottom that are slidably connected to the steel rails.
[0011] The first jack is connected to the flatbed car body, and its top is used to support the steel box girder;
[0012] A rotating support is used for the connection between the first jack and the flatbed vehicle body.
[0013] As a preferred embodiment of this utility model, the roller has an inner rim protruding to prevent derailment.
[0014] As a preferred embodiment of this invention, the front pusher comprises:
[0015] The first rail clamp is fitted onto the rail.
[0016] The second jack has a fixed end that is hinged to the first rail clamp, and its output end is connected to a crossbeam.
[0017] The double tie rods are symmetrically distributed on opposite sides of the rail, with one end fixedly connected to the crossbeam and the other end ball-jointed to the flatbed car body.
[0018] As a preferred embodiment of this utility model, the rear pusher includes a second rail clamp and a third jack hinged to the second rail clamp. The second rail clamp is engaged with the rail, and the output end of the third jack is ball-jointed with the flatbed car body.
[0019] As a preferred embodiment of the present invention, the buoyancy assembly includes a floating vessel on which a fourth jack is fixedly connected, the output end of which is used to support the steel box girder.
[0020] As a preferred embodiment of this invention, the floating vessel is provided with positioning traction cables on both the front and rear sides for stabilizing the floating vessel's direction.
[0021] As a preferred embodiment of the present invention, the positioning and correction assembly includes a locator and an offset warning device that is inductively connected to the locator, wherein the offset warning device is fixedly connected to one end of the rail near the rear pusher.
[0022] The beneficial effects of this utility model are as follows:
[0023] This utility model is a continuous operation device for floating and jacking large-curvature steel box girder. It utilizes the front and rear jacking devices of the hydraulic jacking device to achieve alternating advancement of the steel box girder, realizing continuous jacking operation and effectively improving work efficiency. By using an offset warning device, the jacking position deviation can be monitored in real time, allowing for timely control and preventing deviation and derailment. The front and rear jacking devices are hinged to the load-bearing sliding plate trolley to avoid the problem of track jamming during the jacking of large-curvature bridges. Attached Figure Description
[0024] The present invention will now be described in further detail with reference to the accompanying drawings and specific implementation methods.
[0025] Figure 1 This is a front view of the overall structure of this utility model;
[0026] Figure 2 This is a cross-sectional view of the position of the second rail clamp of this utility model;
[0027] Figure 3 This is a cross-sectional view of the vertical load-bearing sliding plate trolley of this utility model;
[0028] Figure 4 This is a top view of the overall structure of this utility model.
[0029] In the diagram: 1. Hydraulic jacking assembly; 2. Floating support assembly; 3. Positioning and correction assembly; 4. Guide rail assembly; 10. Rail; 11. Vertical load-bearing sliding trolley; 12. Front jack; 13. Rear jack; 21. Floating vessel; 22. Fourth jack; 23. Positioning traction cable; 31. Positioner; 32. Offset warning device; 111. Trolley body; 112. First jack; 113. Roller; 114. Rotary support; 121. Second jack; 122. First rail clamp; 123. Crossbeam; 124. Double tie rod; 131. Third jack; 132. Second rail clamp. Detailed Implementation
[0030] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the present utility model and are not intended to limit the present utility model; that is, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The components of the embodiments of the present utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.
[0031] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.
[0032] The following is combined with Figure 1-4 This invention describes a specific embodiment of a large-curvature steel box girder floating support and jacking continuous operation device, comprising:
[0033] The hydraulic jacking assembly 1 includes a steel rail 10, a vertical load-bearing sliding trolley 11 slidably connected to the steel rail 10, and a front jacking device 12 and a rear jacking device 13 connected to both ends of the vertical load-bearing sliding trolley 11. The top of the vertical load-bearing sliding trolley 11 is used to support one end of the steel box girder, and the front jacking device 12 and the rear jacking device 13 are used to drive the vertical load-bearing sliding trolley 11 to slide along the steel rail 10. When laying the steel frame beam across the river, the vertical load-bearing sliding trolley... The top of the trolley 11 supports one end of the steel box girder, and the steel box girder is laid across the river by sliding at the bottom. The bottom of the vertical bearing sliding trolley 11 slides on the steel rail 10 pre-laid on the ground. The steel rail 10 is used to limit the movement trajectory of the steel box girder. During the sliding of the vertical bearing sliding trolley 11 on the steel rail 10, the front pusher 12 and the rear pusher 13 alternately drive the sliding of the vertical bearing sliding trolley 11, so as to realize the continuous driving of the steel box girder movement.
[0034] The floating component 2 floats on the water surface, and its top is used to support the other end of the steel box girder. The floating component 2 enables the cross-river movement and laying of the steel box girder.
[0035] The positioning and correction component 3 is connected to the rail 10 and located on the side of the hydraulic jacking component 1 away from the floating component 2. The positioning and correction component 3 is used to detect the deviation of the steel box girder and issue an alarm. During the sliding process of the vertical bearing sliding trolley 11 supporting the steel box girder, the positioning and correction component 3 can detect its sliding trajectory. When the sliding deviates, the positioning and correction component 3 detects and issues an alarm signal to warn manual intervention.
[0036] Please refer to Figures 1-3 As shown, the vertical load-bearing sliding trolley 11 includes:
[0037] The flatbed cart body 111 has rollers 113 rotatably connected to the rail 10 at its bottom. The flatbed cart body 111 slides on the rail 10 through the rollers 113 rotatably connected to its bottom.
[0038] The first jack 112 is connected to the flatbed car body 111, and its top is used to support the steel box girder to achieve lifting support for the steel box girder;
[0039] The rotating support 114 is used to connect the first jack 112 and the flatbed car body 111, so that the first jack 112 can rotate horizontally on the flatbed car body 111.
[0040] Please refer to Figure 2 As shown, the roller 113 has an inner rim protruding anti-derailment structure, which can improve the stability of the flatbed car body 111 sliding along the rail 10 and prevent the flatbed car body 111 from sliding off the rail 10.
[0041] Please refer to Figure 1 and Figure 4 As shown, the front pusher 12 includes:
[0042] The first rail clamp 122 is clamped and fitted onto the rail 10, and the first rail clamp 122 can be clamped onto the rail 10;
[0043] The second jack 121 has its fixed end hinged to the first rail clamp 122, and its output end is connected to a crossbeam 123.
[0044] Double tie rods 124 are symmetrically distributed on opposite sides of the rail 10. One end of each rod is fixedly connected to the crossbeam 123, and the other end is ball-jointed to the flatbed car body 111. When the front pusher 12 drives the vertical load-bearing sliding flatbed car 11 to move, the first rail clamp 122 clamps onto the rail 10. The lifting of the second jack 121 drives the crossbeam 123 to move. The crossbeam 123 is connected to the vertical flatbed car body 111 through the double tie rods 124. Ultimately, after the first rail clamp 122 clamps, the second jack 121 drives the vertical load-bearing sliding flatbed car 11 to move.
[0045] Please refer to Figure 1 and Figure 4 As shown, the rear pusher 13 includes a second rail clamp 132 and a third jack 131 hinged to the second rail clamp 132. The second rail clamp 132 clamps and engages with the rail 10. The output end of the third jack 131 is ball-jointed with the flatbed car body 111. The rear pusher 13 is located at the end of the vertically supporting sliding flatbed car 11 away from the front pusher 12. The second rail clamp 132 clamps and engages with the rail 10. The fixed end of the third jack 131 is connected to the second rail clamp 132, and the output end is ball-jointed with the flatbed car body 111. After the second rail clamp 132 clamps and engages with the rail 10, the third jack 131 can be used to lift and drive the flatbed car body 111 and the steel box girder carried on the flatbed car body 111 to move.
[0046] In the alternating pushing drive of the front pusher 12 and the rear pusher 13 on the vertically supporting sliding trolley 11, when the front pusher 12 advances the trolley body 111, the second rail clamp 132 in the rear pusher 13 releases its clamping from the rail 10. At this time, the third jack 131 resets itself after the previous lifting to await the next lifting and pushing of the trolley body 111, while the second jack 121 drives the trolley body 111 to slide on the rail 10. When the rear pusher 13 advances the trolley body 111, the first rail clamp 122 releases its clamping from the rail 10, and the second jack 121 resets itself after the previous pushing of the trolley body 111. Waiting for the next lifting and pushing of the flatbed car body 111, the second rail clamp 132 clamps with the rail 10, and the third jack 131 is used to push the flatbed car body 111. In this way, by using the alternating operation of the front pusher 12 and the rear pusher 13 to drive the flatbed car body 111 to move on the rail 10, the front pusher 12 and the rear pusher 13 can avoid waiting for the third jack 131 or the second jack 121 to be reset. When one set of pushers completes the lifting and pushing, the other set only needs to clamp the rail clamp to realize the pushing of the vertically bearing sliding flatbed car 11, thereby realizing the continuous pushing of the steel box girder and effectively improving the pushing efficiency.
[0047] Please refer to Figure 1 and Figure 4 As shown, the buoy assembly 2 includes a floating boat 21, on which a fourth jack 22 is fixedly connected. The output end of the fourth jack 22 is used to support the steel box girder, and the floating boat 21 is used to support the movement of the other end of the steel box girder on the river.
[0048] Please refer to Figure 1 As shown, the floating vessel 21 is provided with positioning traction cables 23 on both sides of the front end and both sides of the rear end for stabilizing the floating vessel 21. By providing positioning traction cables 23 on both sides of the front and rear ends of the floating vessel 21 and controlling the length of the positioning traction cables 23, the floating direction of the floating vessel 21 is stabilized.
[0049] Please refer to Figure 1 As shown, the positioning and correction component 3 includes a locator 31 and an offset warning device 32 that is inductively connected to the locator 31. The offset warning device 32 is fixedly connected to one end of the rail 10 near the rear pusher 13. The locator 31 is installed at the bottom of the steel box girder. The offset warning device has a preset virtual curved track. When the deviation between the millimeter-level locator 31 coordinates and the preset position coordinates is greater than a threshold of 5mm, the offset warning device issues an alarm signal to remind manual intervention.
[0050] Working principle of this utility model:
[0051] (1) The first jack 112 and the fourth jack 22 are lifted at the same time to raise the bridge beam;
[0052] (2) Loosen the first rail clamp 122 to release the clamping of the rail 10, press the second rail clamp 132 to clamp the rail 10, and control the third jack 131 to lift and drive the car body 111 to slide on the rail 10 through the rollers 113 at the bottom of the device, so that the steel box beam supported on the first jack 112 can move until the first jack 112 drives the operation to move to the preset length;
[0053] (3) Loosen the second rail clamp 132 and reset the third jack 131 to wait for the next lifting drive, press the first rail clamp 122 onto the rail 10, and drive the flatbed car body 111 to slide on the rail 10 through the roller 113 at the bottom of the clamp, so as to advance the flatbed car body 111 to the preset length.
[0054] By using the alternating use of the front pusher 12 and the rear pusher 13, the jacks in the other pusher can be reset while one set of pushers is moving, thus eliminating the need to wait for the jacks to reset and enabling continuous operation of pushing the steel box girder.
[0055] (4) The floating vessel 21 controls its forward direction under the combined force of the positioning traction cable 23 to improve the stability of the floating vessel 21's movement.
[0056] During the movement of the steel box girder, the positioning deviation early warning device 32 monitors the deviation between the millimeter-level positioning device 31 and the preset position coordinates in real time. When the deviation exceeds the threshold of 5mm, the jacking work is stopped and manual operation is intervened and adjusted.
[0057] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," etc., 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; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0058] The above description is merely an example and illustration of the structure of this utility model. Those skilled in the art can make various modifications or additions to the specific embodiments described or use similar methods to replace them, as long as they do not deviate from the structure of the utility model or exceed the scope defined in the claims, they should all fall within the protection scope of this utility model.
Claims
1. A continuous operation device for floating support and jacking of large-curvature steel box girders, characterized in that, include: The hydraulic jacking assembly (1) includes a steel rail (10), a vertical load-bearing sliding trolley (11) slidably connected to the steel rail (10), and a front jacking device (12) and a rear jacking device (13) connected to both ends of the vertical load-bearing sliding trolley (11); the top of the vertical load-bearing sliding trolley (11) is used for supporting one end of the steel box girder, and the front jacking device (12) and the rear jacking device (13) are used to alternately drive the vertical load-bearing sliding trolley (11) to slide along the steel rail (10); The buoyancy assembly (2) floats on the water surface, and its top is used to support the other end of the steel box girder; The positioning and correction component (3) is connected to the rail (10) and located on the side of the hydraulic jacking component (1) away from the floating component (2). The positioning and correction component (3) is used to issue an alarm after detecting the deviation of the moving coordinate of the steel box girder.
2. The continuous operation device for floating support and jacking of large-curvature steel box girder according to claim 1, characterized in that, The vertical load-bearing sliding trolley (11) includes: The flatbed cart body (111) has rollers (113) slidably connected to the rails (10) at the bottom; The first jack (112) is connected to the flatbed car body (111), and its top is used to support the steel box girder; A rotating support (114) is used for the connection between the first jack (112) and the flatbed car body (111).
3. The continuous operation device for floating support and jacking of large-curvature steel box girder according to claim 2, characterized in that: The roller (113) has an inner rim protruding to prevent derailment.
4. The continuous operation device for floating support and jacking of large-curvature steel box girder according to claim 2, characterized in that, The front pusher (12) includes: The first rail clamp (122) clamps and engages with the rail (10); The second jack (121) has its fixed end hinged to the first rail clamp (122), and its output end is connected to a crossbeam (123). Double tie rods (124) are symmetrically distributed on opposite sides of the rail (10), with one end fixedly connected to the crossbeam (123) and the other end ball-jointed to the flatbed car body (111).
5. The continuous operation device for floating support and jacking of large-curvature steel box girder according to claim 2, characterized in that: The rear pusher (13) includes a second rail clamp (132) and a third jack (131) hinged to the second rail clamp (132). The second rail clamp (132) clamps and engages with the rail (10). The output end of the third jack (131) is ball-jointed with the flatbed car body (111).
6. The continuous operation device for floating support and jacking of large-curvature steel box girder according to claim 1, characterized in that: The buoy assembly (2) includes a floating vessel (21) on which a fourth jack (22) is fixedly connected, and the output end of the fourth jack (22) is used to support the steel box girder.
7. A continuous operation device for floating support and jacking of large-curvature steel box girders according to claim 6, characterized in that: The floating vessel (21) is provided with positioning traction cables (23) on both the front and rear sides to stabilize the floating vessel (21).
8. The continuous operation device for floating support and jacking of large-curvature steel box girder according to claim 1, characterized in that: The positioning and correction component (3) includes a locator (31) and an offset warning device (32) connected to the locator (31). The offset warning device (32) is fixedly connected to one end of the rail (10) near the rear pusher (13).