Bridge integral lifting support

Abstract

The utility model relates to bridge construction or maintenance technical field discloses a kind of bridge integral jacking support, comprising: steel longitudinal beam, the steel longitudinal beam is provided with several groups, steel longitudinal beam is along the longitudinal direction of bridge, pass through bent cap, extend bent cap at the both sides of bent cap;Oblique support, the oblique support is provided with several groups, one end of oblique support is fastened and connected with bent cap side by fastening assembly, other end is supported in the below of steel longitudinal beam, to support the extension position of steel longitudinal beam;Steel crossbeam, the steel crossbeam is along the transverse direction of bridge, connect fastening of steel longitudinal beam;And sliding mechanism, the sliding mechanism is provided with several groups, the sliding mechanism includes slidingly matched slide rail and sliding block, the slide rail is arranged in the length direction of the steel longitudinal beam, the sliding block is arranged with the jack for supporting the end baffle of bridge, by adjusting sliding block, to adjust the position of jack, to adapt the end baffle. The bridge integral jacking support of the utility model is convenient to adjust.

Description

Technical Field

[0001] This utility model relates to the field of bridge construction technology, and more specifically, to a bridge integral jacking support. Background Technology

[0002] Using jacks to lift and adjust bridges is an engineering technique that involves "overall lifting" or "local fine-tuning" of a bridge through a hydraulic system without dismantling its structure. This technique is primarily used to address issues such as bridge aging, repair of damage, and adaptive modifications.

[0003] Currently, the most common method for jacking bridges is the corbel jacking method. This method involves inserting reinforcing bars into the side of the bridge cap beam and pouring concrete corbels, or fixing steel corbels to the cap beam with anchor bolts, and then placing jacks on the corbels to carry out the jacking operation.

[0004] However, the traditional corbel jacking method has certain drawbacks: each corbel bears load independently and lacks coordination. When jacking is not synchronized or there is an eccentric load on the bridge, the load is difficult to redistribute automatically among the corbels, which can easily lead to local overload and safety accidents. The jack position is fixed and singular, generally under the web of the main beam, and it is impossible to select the optimal jacking point according to different bridge structures and site conditions, resulting in poor adaptability. Utility Model Content

[0005] This invention addresses the shortcomings of traditional corbel jacking methods by providing a bridge integral jacking support that offers a continuous or regional support platform for multiple jacks. This transforms concentrated "point loads" into relatively uniform "line loads," coordinating and balancing the forces between jacking points, greatly promoting jacking synchronization, and significantly improving the stress state of the beam and cap beam.

[0006] The jack lifting mechanism of this invention is designed for the transverse diaphragm at the end of a bridge. By lifting the transverse diaphragm, the space for jack placement can be effectively expanded, and the jack placement position can be flexibly adjusted, improving the convenience and feasibility of bridge lifting. The effect is even better when the end diaphragms are not on the same plane.

[0007] This technology enables uninterrupted traffic construction, eliminates the damage to the pavement at the connection between adjacent spans caused by traditional single-span jacking, and reduces the social impact and control costs of road closures.

[0008] This utility model is achieved through the following technical solution: A bridge integral jacking support, comprising: The steel longitudinal beams are provided in several groups, and the steel longitudinal beams pass through the cap beams along the longitudinal direction of the bridge, extending out of the cap beams on both sides of the cap beams. The diagonal support is provided in several sets. One end of the diagonal support is fastened to one side of the cap beam through a fastening component, and the other end is supported under the steel longitudinal beam to support the extension part of the steel longitudinal beam. A steel crossbeam, which connects and secures the steel longitudinal beams along the transverse direction of the bridge; The system includes a sliding mechanism, which consists of several sets of sliding rails and sliders that are slidably fitted together. The sliding rails are arranged along the length of the steel longitudinal beams, and the sliders are equipped with jacks for supporting the end diaphragms of the bridge. The position of the jacks can be adjusted by adjusting the sliders to accommodate the end diaphragms.

[0009] Optionally, the steel longitudinal beam is composed of 2-4 I-beams arranged side by side.

[0010] Optionally, the diagonal bracing is made of 2-4 I-beams arranged side by side.

[0011] Optionally, a steel plate is welded to the end of the diagonal support, and the fastening assembly uses anchor bolts to fix the steel plate to the side of the cap beam.

[0012] Optionally, on one side of the cap beam, two steel crossbeams are provided, respectively arranged at the end of the steel longitudinal beam and near the root of the cap beam, and the slide rail is arranged between the two steel crossbeams.

[0013] Optionally, the steel beam is a long steel plate structure.

[0014] Optionally, on one side of the cap beam, several sets of steel crossbeams are provided, arranged between the steel longitudinal beams.

[0015] Optionally, a steel pad is also provided between the jack and the bridge.

[0016] The technical solution of this utility model has at least the following beneficial effects: The bridge jacking support of this utility model first extends the cap beam through the steel longitudinal beam, and is supported by diagonal supports, thereby effectively expanding the space for jack placement; at the same time, by setting a sliding mechanism on the steel longitudinal beam, the placement position of the jacks can be flexibly adjusted in the direction of the slide rail, thereby adapting to the support and jacking of the transverse diaphragms at different positions, and improving the convenience of jack position adjustment. Attached Figure Description

[0017] Figure 1 This is a diagram showing the arrangement of the bridge integral lifting support of this utility model in the bridge cross section. Figure 2 for Figure 1 Enlarged view of part A; Figure 3This is a diagram showing the arrangement of the overall bridge lifting support of this utility model in the longitudinal direction of the bridge. Figure 4 for Figure 3 Enlarged view of part B; Figure 5 This is a diagram showing the arrangement of the overall bridge lifting support of this utility model in the top view of the bridge. Figure 6 for Figure 5 Enlarged view of part C.

[0018] Figure label: 1-Diagonal support, 2-Steel longitudinal beam, 31-Slide rail, 32-Slider, 4-Jack, 5-Steel pad, 6-Steel crossbeam, 7-Horizontal diaphragm. Detailed Implementation

[0019] Reference Figures 1-6 The bridge jacking support of this utility model includes steel longitudinal beams 2, steel crossbeams 6, diagonal supports 1 and sliding mechanism. The steel longitudinal beams 2 are arranged in several groups, and each group of steel longitudinal beams 2 is composed of 2-4 I-beams arranged side by side. The steel longitudinal beams 2 pass through the cap beam along the longitudinal direction of the bridge and extend the cap beam on both sides of the cap beam, thereby forming an expandable platform, which can expand the space for jacks 4.

[0020] The steel crossbeams 6 are arranged along the transverse direction of the bridge, connecting and securing the steel longitudinal beams 2 to form an integral frame structure, thereby improving the overall stability of the platform. In this embodiment, two steel crossbeams 6 are provided on one side of the cap beam. The steel crossbeams 6 are long steel plate structures, respectively arranged at the ends of the steel longitudinal beams 2 and near the root of the cap beam. The steel crossbeams 6 are welded and fixed to each other to form a stable platform. Of course, the steel crossbeams 6 can also be implemented in other ways. For example, on one side of the cap beam, several sets of steel crossbeams 6 can be provided, respectively arranged between the steel longitudinal beams 2. That is, the steel crossbeams 6 adopt a short section structure, respectively connecting the gaps between the steel longitudinal beams 2, which can also achieve an overall stable connection of the platform.

[0021] The diagonal bracing 1 adopts a parallel arrangement of I-beams. Several sets of diagonal bracing 1 are installed. One end of the diagonal bracing 1 is fastened to one side of the cap beam through a fastening assembly, and the other end is supported under the steel longitudinal beam 2 to support the extension of the steel longitudinal beam 2 and ensure the structural strength of the extension of the steel longitudinal beam 2. The diagonal bracing 1 is composed of 2-4 I-beams arranged side by side. Steel plates are welded to the ends of the diagonal bracing 1, and anchor bolts are used as the fastening assembly to fix the steel plates to the side of the cap beam.

[0022] The sliding mechanism comprises several sets, including a sliding rail 31 and a slider 32 that slide together. The sliding rail 31 is arranged along the length of the steel longitudinal beam 2. Jacks 4 for supporting the end diaphragms of the bridge are arranged on the slider 32. By adjusting the slider 32, the position of the jacks 4 is adjusted to accommodate the end diaphragms. A locking bolt (not shown) is provided on the slider 32, which can lock the slider 32 after it is positioned, maintaining its stability and preventing it from sliding freely during the lifting process. In this embodiment, the sliding rail 31 is arranged between two steel crossbeams 6.

[0023] Jack 4 is fixed on slider 32, and steel pad 5 is also installed between jack 4 and bridge.

[0024] The bridge jacking support of this utility model is used by sequentially arranging diagonal supports 1, steel longitudinal beams 2, and steel transverse beams 6 on the cap beam, and then arranging a sliding mechanism on the steel longitudinal beams 2 to complete the platform construction and the arrangement of the sliding mechanism. Then, jacks 4 and steel pads 5 on the sliders 32 of the sliding mechanism are installed. Then, the locking bolts of the sliders 32 are loosened, and the position of the jacks 4 is adjusted so that the lifting position of the jacks 4 is adapted to the transverse diaphragm 7 at the end of the bridge. Then, the locking bolts are tightened to secure the sliders 32. Finally, the hydraulic control system controls the lifting of the jacks 4 to complete the bridge lifting work.

Claims

1. A bridge integral jacking support, characterized in that, include: The steel longitudinal beams are provided in several groups, and the steel longitudinal beams pass through the cap beams along the longitudinal direction of the bridge, extending out of the cap beams on both sides of the cap beams. The diagonal support is provided in several sets. One end of the diagonal support is fastened to one side of the cap beam through a fastening component, and the other end is supported under the steel longitudinal beam to support the extension part of the steel longitudinal beam. A steel crossbeam, which connects and secures the steel longitudinal beams along the transverse direction of the bridge; The system includes a sliding mechanism, which consists of several sets of sliding rails and sliders that are slidably fitted together. The sliding rails are arranged along the length of the steel longitudinal beams, and the sliders are equipped with jacks for supporting the end diaphragms of the bridge. The position of the jacks can be adjusted by adjusting the sliders to accommodate the end diaphragms.

2. The bridge integral lifting support according to claim 1, characterized in that, The steel longitudinal beams are made of 2-4 I-beams arranged side by side.

3. The bridge integral lifting support according to claim 1, characterized in that, The diagonal support is made of 2-4 I-beams arranged side by side.

4. The bridge integral lifting support according to claim 1, characterized in that, The end of the diagonal support is welded with a steel plate, and the fastening assembly uses anchor bolts to fix the steel plate to the side of the cap beam.

5. The bridge integral lifting support according to claim 1, characterized in that, On one side of the cap beam, there are two steel crossbeams, which are respectively arranged at the end of the steel longitudinal beam and near the root of the cap beam, and the slide rail is arranged between the two steel crossbeams.

6. The bridge integral lifting support according to claim 5, characterized in that, The steel beam is a long steel plate structure.

7. The bridge integral lifting support according to claim 1, characterized in that, On one side of the cap beam, several sets of steel crossbeams are provided, which are arranged between the steel longitudinal beams.

8. The bridge integral lifting support according to claim 1, characterized in that, A steel pad is also installed between the jack and the bridge.

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