CN216108104U - Vertical pretensioning device for connecting upper structure and lower structure of bridge - Google Patents
Vertical pretensioning device for connecting upper structure and lower structure of bridge Download PDFInfo
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- CN216108104U CN216108104U CN202122343501.8U CN202122343501U CN216108104U CN 216108104 U CN216108104 U CN 216108104U CN 202122343501 U CN202122343501 U CN 202122343501U CN 216108104 U CN216108104 U CN 216108104U
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Abstract
The utility model belongs to the technical field of bridge design, and particularly relates to a vertical pre-tensioning device for connecting an upper structure and a lower structure of a bridge, which comprises a lower cover beam, an upper cross beam and a pre-tensioning device for connecting the cover beam and the cross beam, wherein the pre-tensioning device comprises an upper structure embedded part, a lower structure embedded part and a middle force transmission system, the upper structure embedded part comprises a cross beam anchor bolt, a cross beam anchor backing plate, a stiffening rib and a bearing steel backing plate, the lower structure embedded part comprises a cover beam anchor bolt, a cover beam anchor backing plate and a steel sleeve, the middle force transmission system comprises a pull rod of which the lower end is movably connected with the steel sleeve, and the pull rod is sequentially provided with a screw cap, an upper steel backing plate, a force transmission spring and a lower steel backing plate connected with the cross beam through the bearing steel backing plate from top to bottom. The force transfer device has the advantages of simple structure, easy manufacture, definite force transfer, easy maintenance and low cost.
Description
Technical Field
The utility model relates to a vertical pretensioning device for connecting an upper structure and a lower structure of a bridge. Belongs to the technical field of bridge design and construction.
Background
In recent years, roads, railways and municipal works in China all have rapidly developed, and the rapid development of national economy is promoted. With the continuous development of national infrastructure, a plurality of new technical problems also appear. Firstly, because the urban land is at a low level, the road design flood frequency is lower. A bridge is newly built between roads on two sides of a river, the design flood frequency of the bridge often cannot meet the standard requirement, and the urban bridge is easily submerged by flood; secondly, in recent years, due to rapid traffic development, bridge overturning accidents caused by overweight vehicles occur occasionally; thirdly, with the continuous development of highway construction, the importance of bridge earthquake resistance is more and more obvious.
Aiming at the problems, the existing bridge design applies longitudinal restraint-abutment back wall to the bridge superstructure; lateral restraint-anti-seismic stop blocks; the bridge bearings are vertically constrained (only under compression). The bridge superstructure lacks vertical tension constraints. Under the adverse conditions, the bridge is easy to damage, such as floating, overturning or beam falling, of the superstructure, and the like, and the operation safety of the bridge is seriously threatened.
The method is characterized in that a heavy vehicle ballast method is adopted to assist the anti-floating and impact resistance of the bridge, and the concrete idea is to ensure that enough load is arranged above the bridge to offset the buoyancy of the river and ensure the stability of the bridge through the ballast of a full-load vehicle for preventing the floating deviation of the bridge caused by overlarge buoyancy of river water on the upper structure of the bridge. The scheme mainly has two effects, namely effective floating resistance and reinforced resistance to horizontal impact force, but the balance weight vehicle is configured on the bridge, so that the temporary solution is not permanent, and the vehicle passing influence in the configuration process is large.
SUMMERY OF THE UTILITY MODEL
The utility model provides a vertical pretensioning device for connecting an upper structure and a lower structure of a bridge, which has the longitudinal movement capacity, can ensure that the longitudinal displacement is generated and the pulling force is effectively transmitted by adopting the spring for bearing, has the advantages of simple structure, easy manufacture, definite force transmission, easy maintenance and low manufacturing cost, and solves the problems in the prior art.
In order to solve the technical problems, the technical scheme of the utility model is as follows:
a vertical pre-tensioning device for connecting an upper structure and a lower structure of a bridge comprises a lower cover beam, an upper cross beam and a pre-tensioning device for connecting the cover beam and the cross beam, wherein the pre-tensioning device comprises an upper structure embedded part arranged on the upper cross beam, a lower structure embedded part arranged on the lower cover beam and a middle force transmission system for connecting the upper structure embedded part and the lower structure embedded part, the upper structure embedded part comprises a cross beam anchor bolt, a cross beam anchor backing plate, a stiffening rib and a bearing steel backing plate, the lower structure embedded part comprises a cover beam anchor bolt, a cover beam anchor backing plate and a steel sleeve, the middle force transmission system comprises a pull rod with the lower end movably connected with the steel sleeve, the pull rod is of an inverted T shape and comprises a vertical pull rod and a transverse pull rod, the transverse pull rod is sleeved in the steel sleeve, and the steel sleeve is welded with the cover beam anchor backing plate, the transverse pull rod is sequentially provided with a nut, an upper steel base plate, a force transmission spring and a lower steel base plate connected with the cross beam through a bearing steel base plate from top to bottom.
The upper steel backing plate and the lower steel backing plate are respectively positioned at the upper end and the lower end of the force transmission spring and are welded with the spring, and the force transmission spring is always in a compressed state.
The beam anchor backing plate is fixedly connected with the beam through a beam anchor bolt, and the screw cap, the upper steel backing plate, the force transmission spring and the lower steel backing plate are located above the bearing steel backing plate.
The middle force transmission system is movably connected with the lower-structure embedded part through the pull rod and the steel sleeve, and is movably connected with the upper-structure embedded part through the screw cap, the upper steel base plate, the force transmission spring and the lower steel base plate.
And two sides of the cover beam are respectively provided with a stop block for limiting the lateral displacement of the cross beam.
The utility model has the following advantages and beneficial effects:
the vertical pretension device for connecting the upper structure and the lower structure of the bridge, disclosed by the utility model, can provide vertical tension for the upper structure under the conditions that the support is possibly empty or even the beam falls under the buoyancy action of earthquake, overturning load and water, so that the problems can be effectively solved, and the application prospect is very wide. The force transmission device has the longitudinal displacement capacity, and can ensure that the bridge normally operates under the action of temperature and braking load; the device has the characteristic of being only in tension and not in compression, and can ensure that the compression is borne by the support when the vehicle runs. The force transmission spring has compression limiting capacity, so that the pull rod can effectively resist the three functions before the support is empty under the action of buoyancy, overturning moment and earthquake. Thereby ensure that bridge beam supports are in the pressurized state all the time, effectively prevent risks such as bridge come-up, topple, roof beam that fall.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural view of a vertical prestressing apparatus for connecting an upper structure and a lower structure of a bridge according to the present invention;
fig. 2 is an elevation view of a device in a vertical prestressing device for connecting an upper structure and a lower structure of a bridge according to the utility model;
fig. 3 is a side view of a device in a vertical prestressing device according to the utility model for connecting the superstructure to the substructure of a bridge;
fig. 4 is a schematic structural view of a load-bearing steel plate in a vertical prestressing device for connecting an upper structure and a lower structure of a bridge according to the present invention.
In the figure, 1-asphalt concrete bridge deck; 2-a cross beam; 3-leveling the concrete layer; 4-a stop block; 5-a capping beam; 6-mounting a steel backing plate; 7-arranging a steel base plate; 8-a stiffener; 9-a force transmission spring; 10-a screw cap; 11-beam anchor backing plate; 12-beam anchor bolts; 13-bearing a steel backing plate; 14-a pull rod; 15-steel casing pipe; 16-bent cap anchor backing plate; 17-capping beam anchor.
Detailed Description
The following further describes embodiments of the present invention with reference to the drawings. It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
Referring to the structural schematic diagram of the vertical pre-tensioning device for connecting the upper structure and the lower structure of the bridge shown in fig. 1, the vertical pre-tensioning device for connecting the upper structure and the lower structure of the bridge comprises a cover beam 5 and a cross beam 2 erected on the cover beam 5, wherein a pre-tensioning device for improving the anti-floating performance and the anti-overturning performance of the cross beam 2 is arranged between the cross beam 2 and the cover beam 5, two sides of the cover beam 5 are respectively provided with a stop block 4 for limiting the lateral displacement of the cover beam 5, and under the buoyancy action of earthquake, overturning load and water, the bridge can possibly have the condition that a support is empty or even falls down.
Referring to an elevation view and a side view of a vertical pretensioning device for connecting an upper structure and a lower structure of a bridge shown in fig. 2 and 3, the device comprises a pull rod 14, wherein the pull rod 14 is of an inverted T shape and comprises a vertical pull rod and a transverse pull rod, the transverse pull rod is sleeved in a steel sleeve 15, the steel sleeve 15 is welded with a cover beam anchor backing plate 16, and the transverse pull rod is sequentially provided with a nut 10, an upper steel backing plate 6, a force transmission spring 9 and a lower steel backing plate 7 connected with the spring 9 through a bearing steel plate from top to bottom. The pull rod 14 is movably connected with the steel sleeve 15, and the steel sleeve 15 is welded with the bent cap anchor backing plate 16. The beam anchor backing plate 11 is fixedly connected with the beam 2 through a beam anchor bolt 12, and the screw cap 10, the upper steel backing plate 6, the force transmission spring 9 and the lower steel backing plate 7 are positioned above the bearing steel backing plate 13. The upper steel backing plate 6 and the lower steel backing plate 7 are respectively located at the upper end and the lower end of the force transmission spring 9 and are respectively in welded connection with the force transmission spring 9, the force transmission spring 9 is in a compressed state, pre-pressure can be applied to the force transmission spring 9 according to the existing condition, the cross beam is prevented from being damaged by flood, the beam falls under the action of earthquake, and the cross beam is prevented from overturning.
The beam anchor backing plate 11 is fixedly connected with the beam 2 through a beam anchor bolt 12, and the screw cap 10, the upper steel backing plate 6, the force transmission spring 9 and the lower steel backing plate 7 are positioned above the bearing steel backing plate 13. And a bent cap anchor bolt 12 in the lower-structure embedded part is in bolted connection with a bent cap anchor backing plate 16, and a steel sleeve 15 is in welded connection with the bent cap anchor backing plate 16. The beam anchor bolts 12 in the embedded part of the upper structure are connected with the beam anchor backing plate 11 through bolts, and the beam anchor backing plate 11, the stiffening ribs 8 and the bearing steel backing plate 13 are connected in a split welding mode or are integrally formed. The middle force transmission system is movably connected with a lower-structure embedded part through a pull rod 14 and a steel sleeve 15, and is movably connected with an upper-structure embedded part through a nut 10, an upper steel base plate 6, a force transmission spring 9 and a lower steel base plate 7. The lower steel base plate 7 is provided with a rectangular opening which ensures that the force transmission device has longitudinal displacement capability in the longitudinal bridge direction.
The device ensures the expansion performance of the bridge, and the integral structural system successfully solves the difficult problems of anti-floating and anti-overturning of the bridge while ensuring the anti-seismic and anti-beam-falling functions of the bridge, and is quick in construction.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. It will be apparent to those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, and the scope of protection is still within the scope of the utility model.
Claims (5)
1. The utility model provides a connect bridge superstructure and substructure's vertical pretensioning device which characterized in that: including lower part bent cap, upper portion crossbeam and being used for connecting the prestretching device of bent cap and crossbeam, prestretching the device including installing superstructure built-in fitting of upper portion crossbeam, installing the substructure built-in fitting of lower part bent cap and being used for connecting the middle force transfer system of superstructure built-in fitting and substructure built-in fitting, superstructure built-in fitting comprises crossbeam crab-bolt, crossbeam anchor backing plate, stiffening rib and bearing steel backing plate, the substructure built-in fitting comprises bent cap crab-bolt, bent cap anchor backing plate, steel casing pipe, middle force transfer system includes a lower extreme and steel casing pipe swing joint's pull rod, the pull rod is the type of falling T, includes vertical pull rod and transverse pull rod, transverse pull rod cup joints in the steel casing pipe, steel casing pipe and bent cap anchor backing plate welded connection, transverse pull rod from last to installing nut down in proper order, The upper steel base plate, the force transmission spring and the lower steel base plate are connected with the cross beam through the bearing steel base plate.
2. A vertical prestressing apparatus for connecting a bridge superstructure to a substructure according to claim 1, wherein: the upper steel backing plate and the lower steel backing plate are respectively positioned at the upper end and the lower end of the force transmission spring and are welded with the spring, and the force transmission spring is always in a compressed state.
3. A vertical prestressing apparatus for connecting a bridge superstructure to a substructure according to claim 2, wherein: the beam anchor backing plate is fixedly connected with the beam through a beam anchor bolt, and the screw cap, the upper steel backing plate, the force transmission spring and the lower steel backing plate are located above the bearing steel backing plate.
4. A vertical prestressing apparatus for connecting a bridge superstructure to a substructure according to claim 1 or 2, wherein: and the capping beam anchor bolt in the lower-structure embedded part is connected with the capping beam anchor backing plate through a bolt.
5. A vertical prestressing apparatus for connecting a bridge superstructure to a substructure according to claim 1, wherein: and two sides of the cover beam are respectively provided with a stop block for limiting the lateral displacement of the cross beam.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122343501.8U CN216108104U (en) | 2021-09-27 | 2021-09-27 | Vertical pretensioning device for connecting upper structure and lower structure of bridge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122343501.8U CN216108104U (en) | 2021-09-27 | 2021-09-27 | Vertical pretensioning device for connecting upper structure and lower structure of bridge |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216108104U true CN216108104U (en) | 2022-03-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122343501.8U Active CN216108104U (en) | 2021-09-27 | 2021-09-27 | Vertical pretensioning device for connecting upper structure and lower structure of bridge |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216108104U (en) |
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2021
- 2021-09-27 CN CN202122343501.8U patent/CN216108104U/en active Active
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