CN212533771U - External prestressed steel beam steering device of continuous box girder bridge - Google Patents
External prestressed steel beam steering device of continuous box girder bridge Download PDFInfo
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- CN212533771U CN212533771U CN202020648039.5U CN202020648039U CN212533771U CN 212533771 U CN212533771 U CN 212533771U CN 202020648039 U CN202020648039 U CN 202020648039U CN 212533771 U CN212533771 U CN 212533771U
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Abstract
The utility model discloses an external prestressing steel bundle steering device of continuous box girder bridge, including the support frame, steering spindle and external prestressing steel bundle, the support frame is connected with the box girder bridge incasement wall, steering spindle and support frame fixed connection, external prestressing steel bundle circumference winding is on the steering spindle, wherein, the support frame includes horizontal steel sheet, first spacing stiffening steel sheet and side anchor plate, horizontal steel sheet sets up in box girder bridge roof beam body bottom, first spacing stiffening steel sheet sets up in horizontal steel sheet both sides and with the box girder bridge incasement wall connection, be used for limiting external prestressing steel bundle displacement, side anchor plate sets up between first spacing stiffening steel sheet and box girder bridge roof beam body, be used for fixing first spacing stiffening steel sheet; the steering shaft is arranged between the transverse steel plate and the first limiting stiffening steel plate. The utility model discloses can solve traditional external prestressing force, the concrete turns to the difficult construction of device, increases the dead weight, and steel truss turns to the device and assembles difficult scheduling problem.
Description
Technical Field
The utility model relates to a field is consolidated in the bridge maintenance, concretely relates to external prestressing steel beam of continuous box girder bridge turns to device.
Background
The external prestress reinforcing technology of the bridge is widely applied, prestress is reasonably applied to the outer side of the bridge by utilizing prestress steel beams, so that the bridge is actively stressed, and the internal force generated by partial external load is offset by the bending moment generated by the prestress, thereby achieving the purposes of improving the service performance of the bridge and improving the structural bearing. The utility model discloses a patent is derived from the improvement to the external prestressing force reinforcement technique of case roof beam, and this utility model focus is to the improvement of external prestressing force steering device.
At present, a prestressed steering device outside a continuous box girder bridge mostly adopts a concrete steering block, a steel truss steering device and a combination form of the concrete steering block and the steel truss steering device. The concrete steering block is mainly formed by embedding steel bars into a beam body, configuring the steel bars of the steering block, then pouring concrete from a box girder top plate, erecting a mold for pouring, and forming the concrete steering block after a curing period. The steel truss steering device is mainly manufactured into components in a factory, and then the rod pieces are assembled through bar planting and node plates on the spot to form the steel truss steering device.
The existing concrete steering block increases the self weight of the structure, and has high construction difficulty and long construction period; the difficulty of transporting, hoisting and assembling the rod pieces in the steel truss steering device is complex, and the prestress friction loss of response also exists when necessary.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an external prestressing force of continuous box girder bridge turns to device to solve the technical problem such as structure dead weight, the construction degree of difficulty and construction cost that the device that turns to of forms such as current concrete, steel truss exists.
In order to solve the technical problem, the utility model provides an external prestressing steel bundle steering device of continuous box girder bridge, which comprises a support frame, steering spindle and external prestressing steel bundle, the support frame is connected with the inner wall of box girder bridge box room, steering spindle and support frame fixed connection, external prestressing steel bundle circumference is wound on the steering spindle, wherein, the support frame includes horizontal steel sheet, first spacing stiffening steel sheet and side anchor plate, horizontal steel sheet sets up in box girder bridge body bottom, first spacing stiffening steel sheet sets up in horizontal steel sheet both sides and with box girder bridge box room inner wall connection, be used for limiting external prestressing steel bundle displacement, side anchor plate sets up between first spacing stiffening steel sheet and box girder bridge body, be used for fixing first spacing stiffening steel sheet; the steering shaft is arranged between the transverse steel plate and the first limiting stiffening steel plate.
Further, the transverse steel plate is connected with the inner wall of the box chamber of the box girder bridge through bolts.
Furthermore, the first limiting stiffening steel plate is connected with the box girder bridge box chamber web plate through bolts.
Further, the side anchoring plates are in bolted connection with the box girder bridge box chamber web.
Furthermore, the connection mode of the steering shaft, the transverse steel plate and the first limiting stiffening steel plate is welding.
Further, the transverse steel plate, the first limiting stiffening steel plate and the side anchoring plate are Q345 steel plates.
Further, the steering shaft material is steel bars.
Compared with the prior art, the beneficial effects of the utility model are that:
1. the external prestressed steel beam steering device is simple in structure, convenient to install, low in cost and easy to construct.
2. The adopted external prestressed steel beam steering device can reasonably change the eccentricity of the external prestressed steel beam according to the construction requirements.
3. The size of the external prestressed steel beam steering device is controllable, and the external prestressed steel beam steering device is suitable for various continuous box girder bridges.
4. The adopted external prestressed steel beam steering device reduces the requirement on concrete, and highlights the advantages of steel in the external prestressed steel beam steering device.
To sum up, adopt the technical scheme of the utility model, traditional external prestressing force can be solved, the concrete turns to the difficult construction of device, increases the dead weight, and steel truss turns to the device and assembles difficulty scheduling problem.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present invention;
fig. 2 is a top view of an embodiment of the present invention;
in the figure, 1-a first limiting stiffening steel plate; 2-a steering shaft; 3-transverse steel plate; 41-a first bolt; 42-a second bolt; 43-third bolt; 5-in vitro prestressed steel strand; 6-side anchoring plate; 7-box girder bridge.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, embodiments accompanied with figures are described in detail below.
The technical scheme of the utility model is that: an external prestressed steel beam steering device of a continuous box girder bridge is shown in figures 1 and 2 and comprises a support frame, a steering shaft 2 and an external prestressed steel beam 5, wherein the support frame is connected with the inner wall of a box chamber of a box girder bridge 7, the steering shaft 2 is fixedly connected with the support frame, and the external prestressed steel beam 5 is circumferentially wound on the steering shaft 2, the support frame comprises a transverse steel plate 3, first limiting stiffening steel plates 1 and side anchoring plates 6, the transverse steel plate 3 is arranged at the bottom of the box girder bridge body, the first limiting stiffening steel plates 1 are arranged at two sides of the transverse steel plate 3 and connected with the inner wall of the box chamber of the box girder bridge 7 and used for limiting the displacement of the external prestressed steel beam 5, and the side anchoring plates 6 are arranged between the first limiting stiffening steel plates 1 and the box girder bridge 7 and used for fixing the first limiting stiffening steel plates 1; the steering shaft 2 is arranged between the transverse steel plate 3 and the first limiting stiffening steel plate 1.
Further, the transverse steel plate 3 is bolted to the inner wall of the tank bridge 7 by the second bolt 42 and the third bolt 43.
Further, the first limiting stiffening steel plate 1 is connected with the box girder bridge 7 box chamber web plate through a first bolt 41.
Further, the side anchoring plates 6 are bolted to the box girder bridge 7 box chamber web by first bolts 41.
Further, the connection mode of the steering shaft 2, the transverse steel plate 3 and the first limiting stiffening steel plate 1 is welding.
Further, the transverse steel plate 3, the first limiting stiffening steel plate 1 and the side anchoring plate 6 are Q345 steel plates.
Further, the material of the steering shaft 2 is steel bars.
In this embodiment, the transverse steel plate 3 is in close contact with the top surface of the bottom plate of the box girder 7, and the side anchoring plate 6 is in close contact with the top surfaces of the inner web plate and the bottom plate of the box girder bridge 7.
In this embodiment, the transverse steel plate 3 is fixed on the top surface of the bottom plate of the box girder bridge 7 through the second bolt 4-2, and the first limiting stiffening steel plate 1 is fixed on the inner wall of the side surface of the box girder together with the side anchoring plate through the first bolt.
In this embodiment, the transverse steel plate 3 is an L-shaped steel plate, and the first limiting stiffening steel plate 1 and the side anchoring plate 6 are irregular steel plates conforming to the inner angle of the box girder.
In the actual use process, the transverse steel plate 3 is formed by connecting two steel plates with the size of less than 50 x 20 into a whole through a third bolt, the length of the transverse steel plate 3 is 0.4 a-0.5 a, wherein a is the cross section length of the box girder bridge 7.
In practice, the diameter of the steering shaft 2 is 10 mm.
In the in-service use process, the quantity of first spacing stiffening steel sheet 1 is two, two first spacing stiffening steel sheet 1 symmetry is vertical to be laid in the case room both sides of case girder bridge 7, and first spacing stiffening steel sheet 1 and side anchor 6 are 100mm along the length of the longitudinal length direction of case roof beam, the cross sectional shape requirement of first spacing stiffening steel sheet 1 and side anchor 6 accords with 7 case indoor corners of case girder bridge, and the two is high, the width of first spacing stiffening steel sheet is 0.1a, and wherein an is the cross section length of case girder bridge 7.
In the actual use process, according to the required strength, the first bolt 4-1, the second bolt 4-2 and the third bolt 4-3 are all M20 anchor bolts, and the depth of the anchor bolts implanted into the box girder bridge 7 is 30 cm.
In the actual use process, first spacing stiffening steel sheet 1 and horizontal steel sheet 3 all form wholly through the mode of planting the muscle with box girder bridge 7.
The embodiments of the present invention are not limited to the above-mentioned preferred embodiments, and any person can obtain other products in various forms under the teaching of the present invention, but any changes in the shape or structure are possible, and all the embodiments have the same or similar technical solutions as the present invention, and are within the scope of protection.
Claims (7)
1. The external prestressed steel beam steering device of the continuous box girder bridge is characterized by comprising a support frame, a steering shaft and an external prestressed steel beam, wherein the support frame is connected with the inner wall of a box girder bridge chamber of the box girder bridge, the steering shaft is fixedly connected with the support frame, and the external prestressed steel beam is wound on the steering shaft in the circumferential direction; the steering shaft is arranged between the transverse steel plate and the first limiting stiffening steel plate.
2. The device for steering the external prestressed steel beams of the continuous box girder bridge as recited in claim 1, wherein the transverse steel plate is bolted to the inner wall of the box girder bridge.
3. The device for steering the external prestressed steel beams of the continuous box girder bridge as recited in claim 1, wherein the first limiting stiffening steel plate is bolted to the indoor web of the box girder bridge.
4. The apparatus for turning the external prestressed steel beams of the continuous box girder bridge as claimed in claim 1, wherein the side anchor plates are bolted to the indoor web of the box girder bridge.
5. The device for steering the external prestressed steel beams of the continuous box girder bridge as recited in claim 1, wherein the steering shaft is connected with the transverse steel plate and the first limiting and stiffening steel plate by welding.
6. The apparatus for turning prestressed steel bundles in vitro of continuous box girder bridge of claim 1, wherein said transverse steel plate, first spacing stiffening steel plate and side anchoring plate are all Q345 steel plate.
7. The apparatus for steering the external prestressed steel strand of the continuous box girder bridge as recited in claim 1, wherein the steering shaft is made of steel bar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020648039.5U CN212533771U (en) | 2020-04-26 | 2020-04-26 | External prestressed steel beam steering device of continuous box girder bridge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020648039.5U CN212533771U (en) | 2020-04-26 | 2020-04-26 | External prestressed steel beam steering device of continuous box girder bridge |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212533771U true CN212533771U (en) | 2021-02-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020648039.5U Active CN212533771U (en) | 2020-04-26 | 2020-04-26 | External prestressed steel beam steering device of continuous box girder bridge |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212533771U (en) |
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2020
- 2020-04-26 CN CN202020648039.5U patent/CN212533771U/en active Active
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20210312 Address after: 430074, No. 693 Xiong Chu street, Hongshan District, Hubei, Wuhan Patentee after: WUHAN INSTITUTE OF TECHNOLOGY Patentee after: China Zhongtie Major Bridge Engineering Group Co.,Ltd. Patentee after: CHINA RAILWAY BRIDGE SCIENCE RESEARCH INSTITUTE, Ltd. Address before: 430074, No. 693 Xiong Chu street, Hongshan District, Hubei, Wuhan Patentee before: WUHAN INSTITUTE OF TECHNOLOGY |