CN215366875U - Concrete bridge structure with external vertical prestress - Google Patents
Concrete bridge structure with external vertical prestress Download PDFInfo
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- CN215366875U CN215366875U CN202120369272.4U CN202120369272U CN215366875U CN 215366875 U CN215366875 U CN 215366875U CN 202120369272 U CN202120369272 U CN 202120369272U CN 215366875 U CN215366875 U CN 215366875U
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Abstract
The utility model relates to a concrete bridge structure with external vertical prestress, which comprises a concrete bridge, wherein external vertical prestress steel bars are arranged outside a web plate of the concrete bridge, two ends of each external vertical prestress steel bar are fixed at the end part of the web plate through anchoring devices, and the middle parts of the external vertical prestress steel bars are exposed outside the web plate. The utility model provides a structure for adding vertical prestress to a bridge with diseases or a bridge with a load grade needing to be improved, and the vertical prestress can be added outside a web plate body for the original bridge with the vertical prestress or without the vertical prestress. And the vertical prestress can be established on both sides of the web plate simultaneously or only on one side of the web plate. The concrete bridge structure with the external vertical prestress solves the problems of serious vertical prestress loss, web cracking, structural downwarping and the like, realizes the reinforcement of the bridge structure, and is simple to operate and low in cost.
Description
Technical Field
The utility model belongs to the technical field of concrete bridges, and particularly relates to a concrete bridge structure with external vertical prestress.
Background
At present, the web cracking phenomenon of prestressed concrete bridges (including all girder bridges, arch bridges, cable-stayed bridges, short-tower cable-stayed bridges or suspension bridges adopting box girder sections) is common, and the main reason is that the vertical prestress in the original prestressed concrete bridge girder structure is not fully established and is unreliable. These bridges with prestressing problems are called damaged concrete bridges.
The potential safety hazard of the damaged concrete bridge is very large, and the safe operation of the bridge is seriously endangered, so that the damaged concrete bridge needs to be reinforced or maintained. The existing reinforcement of the concrete bridge with the diseases generally adopts a longitudinal external prestress mode, but the local anchoring of the longitudinal prestress damages the original bridge structure with the diseases. Meanwhile, the original vertical prestress stock in the damaged bridge is not clear, so the reinforcing effect is not clear. Therefore, the above bridge reinforcing method has a drawback.
SUMMERY OF THE UTILITY MODEL
Aiming at the problem that the reinforcing effect is not clear due to the fact that the existing vertical prestress storage in a damaged bridge is not clear in the prior art, the utility model provides a concrete bridge structure with external vertical prestress.
The purpose of the utility model can be realized by the following technical scheme:
the utility model provides a concrete bridge structure with external vertical prestress, which comprises a concrete bridge, wherein an external vertical prestress steel bar is arranged outside a web plate of the concrete bridge, two ends of the external vertical prestress steel bar are fixed at the end part of the web plate through anchoring devices, and the middle part of the external vertical prestress steel bar is exposed outside the web plate.
In one embodiment of the utility model, the concrete bridge is selected to have a structure without vertical prestressed reinforcement in the body, or a structure with vertical prestressed reinforcement in the body. That is to say, this embodiment has the concrete bridge structure of external vertical prestressing force and is applicable to the structure that does not have vertical prestressing steel in the former concrete bridge internal or has vertical prestressing steel in vivo.
In one embodiment of the utility model, when the concrete bridge selects a structure with vertical prestressed reinforcement in the body, the concrete bridge is suitable for the condition that the vertical prestress in the body is smaller than the set vertical prestress and the load grade needs to be improved.
In one embodiment of the utility model, one external vertical prestressed reinforcement is provided, which is located inside or outside the web of the concrete bridge.
In an embodiment of the utility model, one external vertical prestressed reinforcement is provided, two ends of the inner side or the outer side of the web of the concrete bridge are provided with vertical ducts, and two ends of the external vertical prestressed reinforcement are fixed in the vertical ducts through anchoring devices.
In one embodiment of the present invention, the vertical duct is filled with a grouting material, and the external vertical prestressed reinforcement is wrapped by the grouting material.
In one embodiment of the utility model, two external vertical prestressed reinforcements are arranged and are positioned on the inner side and the outer side of the web plate of the concrete bridge.
In one embodiment of the present invention, when two external vertical prestressed reinforcements are provided, the external vertical prestressed reinforcements located at the inner side of the web are fixed in the following manner: vertical pore canals are formed in the two ends of the inner side of the web plate, and the two ends of the external vertical prestressed steel bars are fixed in the vertical pore canals through anchoring devices.
In an embodiment of the present invention, when two external vertical prestressed reinforcements are provided, the external vertical prestressed reinforcements located outside the web are fixed in the following manner: vertical pore has been seted up to the upper end in the web outside, the upper end of external vertical prestressing steel is fixed through anchor in the vertical pore, the lower extreme in the web outside is provided with newly-increased anchor block, be equipped with vertical pore in the newly-increased anchor block, the lower extreme of external vertical prestressing steel passes through anchor to be fixed in the vertical pore.
In an embodiment of the utility model, when two external vertical prestressed reinforcements are provided, the vertical duct is filled with a grouting material, and the external vertical prestressed reinforcements are wrapped by the grouting material.
In one embodiment of the present invention, the selected grouting material is the same grouting material as the original concrete bridge web body, or the selected grouting material can be bonded with the external vertical prestressed reinforcement and the original concrete bridge web body.
Compared with the prior art, the utility model has the following advantages and beneficial effects:
the utility model provides a structure for adding vertical prestress to a bridge with diseases or a bridge with a load grade needing to be improved, and the vertical prestress can be added outside a web plate body for the original bridge with the vertical prestress or without the vertical prestress. And the vertical prestress can be established on both sides of the web plate simultaneously or only on one side of the web plate.
The concrete bridge structure with the external vertical prestress solves the problems of serious vertical prestress loss, web cracking, structural downwarping and the like, realizes the reinforcement of the bridge structure, and is simple to operate and low in cost.
Drawings
FIG. 1 is a schematic structural view of an original bridge in example 1 after two new external vertical prestressed reinforcements are added and grouted under the condition of vertical prestress;
FIG. 2 is a schematic structural view of an existing bridge in example 2 after two new external vertical prestressed reinforcements are added and grouted under the condition of no vertical prestress;
fig. 3 is a schematic structural view of embodiment 3, in which a new external vertical prestressed reinforcement is added and grouted under the condition that the original bridge has vertical prestress.
The reference numbers in the figures indicate: 1. the concrete bridge comprises a concrete bridge body, 2 original vertical prestressed reinforcements, 3 original anchoring devices, 4 external vertical prestressed reinforcements, 5 new anchoring devices, 6 new additional anchoring blocks, 7 and grouting materials.
Detailed Description
The utility model provides a concrete bridge structure with external vertical prestress, which comprises a concrete bridge, wherein an external vertical prestress steel bar is arranged outside a web plate of the concrete bridge, two ends of the external vertical prestress steel bar are fixed at the end part of the web plate through anchoring devices, and the middle part of the external vertical prestress steel bar is exposed outside the web plate.
In one embodiment of the utility model, the concrete bridge is selected to have a structure without vertical prestressed reinforcement in the body, or a structure with vertical prestressed reinforcement in the body. That is to say, this embodiment has the concrete bridge structure of external vertical prestressing force and is applicable to the structure that does not have vertical prestressing steel in the former concrete bridge internal or has vertical prestressing steel in vivo.
In one embodiment of the utility model, when the concrete bridge selects a structure with vertical prestressed reinforcement in the body, the concrete bridge is suitable for the condition that the vertical prestress in the body is smaller than the set vertical prestress and the load grade needs to be improved.
In one embodiment of the utility model, one external vertical prestressed reinforcement is provided, which is located inside or outside the web of the concrete bridge.
In an embodiment of the utility model, one external vertical prestressed reinforcement is provided, two ends of the inner side or the outer side of the web of the concrete bridge are provided with vertical ducts, and two ends of the external vertical prestressed reinforcement are fixed in the vertical ducts through anchoring devices.
In one embodiment of the present invention, the vertical duct is filled with a grouting material, and the external vertical prestressed reinforcement is wrapped by the grouting material.
In one embodiment of the utility model, two external vertical prestressed reinforcements are arranged and are positioned on the inner side and the outer side of the web plate of the concrete bridge.
In one embodiment of the present invention, when two external vertical prestressed reinforcements are provided, the external vertical prestressed reinforcements located at the inner side of the web are fixed in the following manner: vertical pore canals are formed in the two ends of the inner side of the web plate, and the two ends of the external vertical prestressed steel bars are fixed in the vertical pore canals through anchoring devices.
In an embodiment of the present invention, when two external vertical prestressed reinforcements are provided, the external vertical prestressed reinforcements located outside the web are fixed in the following manner: vertical pore has been seted up to the upper end in the web outside, the upper end of external vertical prestressing steel is fixed through anchor in the vertical pore, the lower extreme in the web outside is provided with newly-increased anchor block, be equipped with vertical pore in the newly-increased anchor block, the lower extreme of external vertical prestressing steel passes through anchor to be fixed in the vertical pore.
In an embodiment of the utility model, when two external vertical prestressed reinforcements are provided, the vertical duct is filled with a grouting material, and the external vertical prestressed reinforcements are wrapped by the grouting material.
In one embodiment of the present invention, the selected grouting material is the same grouting material as the original concrete bridge web body, or the selected grouting material can be bonded with the external vertical prestressed reinforcement and the original concrete bridge web body.
The utility model is described in detail below with reference to the figures and specific embodiments.
Example 1
Referring to fig. 1, the present embodiment provides a concrete bridge structure having an external vertical prestress,
the concrete bridge structure with external vertical prestressing force that this embodiment provided is to there being the suitable mode of vertical prestressing force to former active concrete bridge, specifically, in this embodiment, add new external vertical prestressing steel outside the web of active concrete bridge.
Referring to fig. 1, in order to solve the problem of vertical prestress of the original bridge, the concrete bridge 1 contains original vertical prestressed reinforcements 2, and original anchoring devices 3 are arranged at two ends of the original vertical prestressed reinforcements 2.
The concrete bridge is characterized in that an external vertical prestressed steel bar 4 is arranged outside a web plate of a concrete bridge 1 with vertical prestress in an original bridge, two ends of the external vertical prestressed steel bar 4 are fixed at the end part of the web plate through a new anchoring device 5, and the middle part of the external vertical prestressed steel bar 4 is exposed outside the web plate.
Referring to fig. 1, the embodiment provides that two external vertical prestressed reinforcements 4 are provided, which are located at the inner side and the outer side of the web,
for the external vertical prestressed reinforcement 4 located at the inner side of the web, the fixing mode is as follows: two ends of the inner side of the web plate are provided with vertical pore channels, two ends of the external vertical prestressed reinforcement 4 are fixed in the vertical pore channels through new anchoring devices 5, grouting materials 7 are filled in the vertical pore channels, and the external vertical prestressed reinforcement 4 is wrapped in the grouting materials 7;
for the external vertical prestressed steel bars positioned at the outer side of the web plate, the fixing mode is as follows: the upper end of the outer side of the web plate is provided with a vertical hole, the upper end of the external vertical prestressed reinforcement 4 is fixed in the vertical hole through a new anchoring device 5, the lower end of the outer side of the web plate is provided with a new anchoring block 6, a vertical hole is arranged in the new anchoring block 6, the lower end of the external vertical prestressed reinforcement 4 is fixed in the vertical hole through the new anchoring device 6, the vertical hole is filled with grouting material 7, and the grouting material 7 wraps the external vertical prestressed reinforcement.
Example 2
Different from embodiment 1, the concrete bridge structure with external vertical prestressing force that this embodiment provided is to former existing service concrete bridge not at the mode that vertical prestressing force is suitable for, particularly, refer to fig. 2, the condition of original bridge non-vertical prestressing force sets up external vertical prestressing steel 4 at the external of the web of original bridge non-vertical prestressing force's concrete bridge 1, the both ends of external vertical prestressing steel 4 are fixed at the web tip through new anchor 5, the middle part of external vertical prestressing steel 4 exposes outside the web.
Referring to fig. 2, the embodiment provides that two external vertical prestressed reinforcements 4 are provided, which are positioned at the inner side and the outer side of the web,
for the external vertical prestressed reinforcement 4 located at the inner side of the web, the fixing mode is as follows: two ends of the inner side of the web plate are provided with vertical pore channels, two ends of the external vertical prestressed reinforcement 4 are fixed in the vertical pore channels through new anchoring devices 5, grouting materials 7 are filled in the vertical pore channels, and the external vertical prestressed reinforcement 4 is wrapped in the grouting materials 7;
for the external vertical prestressed steel bars positioned at the outer side of the web plate, the fixing mode is as follows: the upper end of the outer side of the web plate is provided with a vertical hole, the upper end of the external vertical prestressed reinforcement 4 is fixed in the vertical hole through a new anchoring device 5, the lower end of the outer side of the web plate is provided with a new anchoring block 6, a vertical hole is arranged in the new anchoring block 6, the lower end of the external vertical prestressed reinforcement 4 is fixed in the vertical hole through the new anchoring device 6, the vertical hole is filled with grouting material 7, and the grouting material 7 wraps the external vertical prestressed reinforcement.
In this embodiment, when grouting at the external vertical prestressed reinforcement, the selected grouting material is the same as the original concrete bridge main body, or the selected grouting material can be bonded with the external vertical prestressed reinforcement and the original concrete bridge main body.
Example 3
Referring to fig. 3, in embodiment 1, in the present embodiment, under the condition that the original bridge has vertical prestress, one external vertical prestressed reinforcement is additionally arranged outside the concrete bridge body and is located inside the web;
vertical pore canals are formed in the two ends of the inner side of the web plate, the two ends of the external vertical prestressed reinforcement 4 are fixed in the vertical pore canals through new anchoring devices 5, grouting materials 7 are filled in the vertical pore canals, and the external vertical prestressed reinforcement 4 is wrapped by the grouting materials 7. The grouting material realizes stable connection between two ends of the external vertical prestressed reinforcement and the web.
When the concrete bridge structure with external vertical prestressing force that this embodiment of in-service use provided, also can set up external vertical prestressing steel in the outside of web on the basis of this embodiment.
The embodiment provides a structure that vertical prestress is added to a bridge with a disease bridge or a bridge with a load grade needing to be improved, and the vertical prestress can be added outside a web plate for the original bridge with or without the vertical prestress. And the vertical prestress can be established on both sides of the web plate simultaneously or only on one side of the web plate.
The concrete bridge structure with the external vertical prestress solves the problems of serious vertical prestress loss, web cracking, structural downwarping and the like, and realizes the reinforcement of the bridge structure, and is simple to operate and low in cost.
The embodiments described above are intended to facilitate the understanding and use of the utility model by those skilled in the art. It will be readily apparent to those skilled in the art that various modifications to these embodiments may be made, and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the above embodiments, and those skilled in the art should make improvements and modifications within the scope of the present invention based on the disclosure of the present invention.
Claims (10)
1. The utility model provides a concrete bridge structure with external vertical prestressing force, includes concrete bridge, its characterized in that the external vertical prestressing steel that sets up of web of concrete bridge, the both ends of external vertical prestressing steel are passed through anchoring device and are fixed at the web tip, the middle part of external vertical prestressing steel exposes outside the web.
2. The concrete bridge structure with vertical external prestressing according to claim 1, wherein the concrete bridge is selected as a structure without vertical internal prestressing or as a structure with vertical internal prestressing.
3. The concrete bridge structure with external vertical prestress according to claim 2, wherein the internal vertical prestress is smaller than the preset vertical prestress when the concrete bridge is selected to have a structure with internal vertical prestress steel bars.
4. The concrete bridge structure with external vertical prestress of claim 1, wherein one external vertical prestress steel bar is provided at the inner side or the outer side of the web of the concrete bridge.
5. The concrete bridge structure with the external vertical prestress is characterized in that vertical holes are formed in two ends of the inner side or the outer side of a web plate of the concrete bridge, and two ends of the external vertical prestress steel bars are fixed in the vertical holes through anchoring devices.
6. The concrete bridge structure with external vertical prestress of claim 5, wherein the vertical hole is filled with grouting material, and the grouting material wraps the external vertical prestress steel bars.
7. The concrete bridge structure with external vertical prestress of claim 1, wherein two external vertical prestress reinforcements are arranged at the inner side and the outer side of the web plate of the concrete bridge.
8. The concrete bridge structure with external vertical prestress of claim 7, wherein for the external vertical prestress steel bars located at the inner side of the web, the fixing mode is as follows: vertical pore canals are formed in the two ends of the inner side of the web plate, and the two ends of the external vertical prestressed steel bars are fixed in the vertical pore canals through anchoring devices.
9. The concrete bridge structure with external vertical prestress of claim 7, wherein for external vertical prestress steel bars located outside the web, the fixing mode is: vertical pore has been seted up to the upper end in the web outside, the upper end of external vertical prestressing steel is fixed through anchor in the vertical pore, the lower extreme in the web outside is provided with newly-increased anchor block, be equipped with vertical pore in the newly-increased anchor block, the lower extreme of external vertical prestressing steel passes through anchor to be fixed in the vertical pore.
10. The concrete bridge structure with external vertical prestress according to claim 7 or 8, wherein the vertical hole is filled with grouting material, and the grouting material wraps the external vertical prestress steel bars.
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| CN202120369272.4U CN215366875U (en) | 2021-02-10 | 2021-02-10 | Concrete bridge structure with external vertical prestress |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114922125A (en) * | 2022-05-07 | 2022-08-19 | 山东交通学院 | PC beam type bridge, and reinforcing device and method for PC beam type bridge |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114922125A (en) * | 2022-05-07 | 2022-08-19 | 山东交通学院 | PC beam type bridge, and reinforcing device and method for PC beam type bridge |
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