CN204112205U - The enhancing structure in large span prestressed concrete box beam cross section - Google Patents
The enhancing structure in large span prestressed concrete box beam cross section Download PDFInfo
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- CN204112205U CN204112205U CN201420553158.7U CN201420553158U CN204112205U CN 204112205 U CN204112205 U CN 204112205U CN 201420553158 U CN201420553158 U CN 201420553158U CN 204112205 U CN204112205 U CN 204112205U
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- wing
- stretch
- top board
- box beam
- presstressed reinforcing
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Abstract
The utility model relates to a kind of enhancing structure of large span prestressed concrete box beam cross section.A presstressed reinforcing steel is at least provided with in this enhancing structure, one end of described presstressed reinforcing steel arranges the first stretch-draw port at a flank limit of the Box-girder Bridges top board i.e. edge of a wing place on the first wing limit, the presstressed reinforcing steel other end curls up along the top board of Box-girder Bridges, the web relative with the top board edge of a wing being provided with the first stretch-draw port, base plate, the web adjacent with being provided with the top board edge of a wing of the first stretch-draw port successively from described first stretch-draw port, and then along the top board of Box-girder Bridges around the opposite side top board wing limit i.e. edge of a wing place on the second wing limit extending Box-girder Bridges; Described presstressed reinforcing steel is provided with the second stretch-draw port at the edge of a wing place on described second wing limit.This enhancing structure construction difficulty is low, and efficiency of construction is higher, thus can significantly improve the applying efficiency of vertical prestressing, and can ensure the intensity that box beam is horizontal and vertical to also add the cross section rigidity of box beam.
Description
Technical field
The utility model belongs to large span prestressed concrete Box-girder Bridges technical field, is specifically related to a kind of enhancing structure of large span prestressed concrete box beam cross section.
Background technology
At present, large-span prestressed concrete beam bridge is used widely, large-span prestressed concrete beam bridges built a large amount of both at home and abroad.In built bridge, longitudinal crack has been there is in a lot of large-span prestressed concrete beam bridge on box beam top board, then there is diagonal crack in web, the durability of bridge is caused to reduce and bridge floor damage, thus have impact on the normal use of bridge, cause huge economic loss and bad social influence.Top board longitudinal crack Producing reason mainly top board direction across bridge tensile strength is not enough, and under the acting in conjunction of bridge load and longitudinal prestressing, larger tensile stress appears in box beam top board; The generation of weakened web is mainly caused by web shear strength deficiency.
For improving the horizontal and vertical intensity of prestressed concrete box beams, current common practices is respectively at the transverse direction of box beam top board and the vertical Shi Hanzhang of web.The construction technology of this way is comparatively loaded down with trivial details, is difficult to ensure construction quality, and due to vertical prestressing bar shorter, by construction technology, institute limits and can cause larger loss of prestress, and prestressed efficiency comparison is low, is difficult to the shear strength of guarantee web.
Summary of the invention
The purpose of this utility model is to overcome the deficiencies in the prior art, provides a kind of enhancing structure of large span prestressed concrete box beam cross section.This enhancing structure construction difficulty is low, and efficiency of construction is higher, thus can significantly improve the applying efficiency of vertical prestressing, and can ensure the intensity that box beam is horizontal and vertical to also add the cross section rigidity of box beam.
For achieving the above object, the utility model have employed following technical scheme:
A kind of enhancing structure of large span prestressed concrete box beam cross section, a presstressed reinforcing steel is at least provided with in this enhancing structure, one end of described presstressed reinforcing steel arranges the first stretch-draw port at a flank limit of the Box-girder Bridges top board i.e. edge of a wing place on the first wing limit, the presstressed reinforcing steel other end from described first stretch-draw port along the top board of Box-girder Bridges, the web relative with the top board edge of a wing being provided with the first stretch-draw port, base plate, the web adjacent with the top board edge of a wing being provided with the first stretch-draw port curls up successively, and then along the top board of Box-girder Bridges around the opposite side top board wing limit i.e. edge of a wing place on the second wing limit extending Box-girder Bridges, described presstressed reinforcing steel is provided with the second stretch-draw port at the edge of a wing place on described second wing limit.
Preferably, this enhancing structure is vertically arranged with many presstressed reinforcing steels along Box-girder Bridges, these many presstressed reinforcing steels to curl up direction identical, and the first stretch-draw port of these many presstressed reinforcing steels is arranged on the edge of a wing place on the same flank limit of Box-girder Bridges top board.
Preferably, the first stretch-draw port of described presstressed reinforcing steel and the second stretch-draw port office are on two of Box-girder Bridges different cross sections.
The beneficial effects of the utility model are:
1) presstressed reinforcing steel, in this enhancing structure curls up in petrin shape, and two stretch-draw ports of described presstressed reinforcing steel can be arranged on the same cross section of box beam, also can be arranged on two different cross sections along the length direction of box beam.When the presstressed reinforcing steel of petrin shape is arranged on the same cross section of box beam, this enhancing structure just meets only by a presstressed reinforcing steel simultaneously and applies laterally and the needs of vertical prestressing, thus greatly simplifies construction technology.In addition, the not only constructability operation of this enhancing structure, and be easy to ensure construction quality.
2) the single presstressed reinforcing steel, in this enhancing structure adopts the frame mode of two ends stretch-draw, effectively can reduce loss of prestress.
3) the every root presstressed reinforcing steel, in this enhancing structure all extends layout twist along the length direction of box beam, thus makes the stressed even more ideal of presstressed reinforcing steel, considerably increases stability and the reliability of presstressed reinforcing steel work.
4), this enhancing structure can improve the applying efficiency of vertical prestressing significantly, and can ensure that box beam laterally and vertical intensity, also effectively increases the cross section rigidity of box beam.
5) the enhancing arrangement works, in the present invention is reliable, economy and facility. adopt the enhancing structure in the present invention can reduce the workload of anchoring 50%, save the material of more than 50%, therefore this enhancing structure greatly reduces difficulty of construction, improve operating efficiency, saved resource and reduced cost.
Accompanying drawing explanation
Fig. 1 is the mounting structure schematic diagram of this enhancing structure.
Fig. 2 is the schematic top plan view of Fig. 1.
In figure, the implication of label symbol is as follows:
111-edge of a wing, 11B-the second wing limit, 10-box beam 11A-the first wing limit
12A/12B-web 121-web edge 13-base plate 14-cavity
One end of 20-presstressed reinforcing steel 21-the first stretch-draw port, 22-presstressed reinforcing steel
The other end 24-the second stretch-draw port of 23-presstressed reinforcing steel
Detailed description of the invention
Below in conjunction with accompanying drawing, structure of the present utility model and the course of work are described further.
As shown in Figure 1, 2, this enhancing structure is provided with many presstressed reinforcing steels 20 along the length direction of box beam 10, these many presstressed reinforcing steels 20 to curl up direction identical.
For a presstressed reinforcing steel 20, as shown in Figure 1, one end 22 of this presstressed reinforcing steel 20 on a flank limit of box beam 10 top board that is the edge of a wing 111 place of the first wing limit 11A the first stretch-draw port 21 is set, presstressed reinforcing steel 20 other end 23 from described first stretch-draw port 21 place along the top board of box beam 10, the web 12B relative with the top board edge of a wing being provided with the first stretch-draw port 22, base plate 13, the web 12A adjacent with the top board edge of a wing being provided with the first stretch-draw port 22 curls up successively, and then along the top board of box beam 10 around the opposite side top board wing limit i.e. edge of a wing 111 place of the second wing limit 11B extending box beam 10, described presstressed reinforcing steel 20 is provided with the second stretch-draw port 24 at the edge of a wing 111 place of described second wing limit 11B.
As shown in Figure 2, the first stretch-draw port 21 of many presstressed reinforcing steels 20 is arranged on the edge of a wing place on the same flank limit of box beam 10 top board.
As shown in Figure 2, the first stretch-draw port 21 of each root presstressed reinforcing steel 20 and the second stretch-draw port 24 are divided equally on the different cross section of two of being in box beam 10.
Claims (3)
1. the enhancing structure in a large span prestressed concrete box beam cross section, it is characterized in that: in this enhancing structure, be at least provided with a presstressed reinforcing steel (20), one end of described presstressed reinforcing steel (20) on a flank limit of box beam (10) top board that is the edge of a wing place on the first wing limit (11A) the first stretch-draw port (21) is set, presstressed reinforcing steel (20) other end from described first stretch-draw port (21) place along the top board of box beam (10), the web (12B) relative with the top board edge of a wing being provided with the first stretch-draw port (22), base plate (13), the web (12A) adjacent with the top board edge of a wing being provided with the first stretch-draw port (22) curls up successively, and then along the top board of box beam (10) around the opposite side top board wing limit i.e. edge of a wing place on the second wing limit (11B) extending box beam (10), described presstressed reinforcing steel (20) is provided with the second stretch-draw port (24) at the edge of a wing place on described second wing limit (11B).
2. the enhancing structure in large span prestressed concrete box beam cross section according to claim 1, it is characterized in that: this enhancing structure is vertically arranged with many presstressed reinforcing steels (20) along box beam (10), these many presstressed reinforcing steels (20) to curl up direction identical, and the first stretch-draw port (21) of these many presstressed reinforcing steels (20) is arranged on the edge of a wing place on the same flank limit of box beam (10) top board.
3. the enhancing structure in large span prestressed concrete box beam cross section according to claim 1 and 2, is characterized in that: the first stretch-draw port (21) of described presstressed reinforcing steel (20) and the second stretch-draw port (24) point are on the different cross section of two of box beam (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420553158.7U CN204112205U (en) | 2014-09-24 | 2014-09-24 | The enhancing structure in large span prestressed concrete box beam cross section |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420553158.7U CN204112205U (en) | 2014-09-24 | 2014-09-24 | The enhancing structure in large span prestressed concrete box beam cross section |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204112205U true CN204112205U (en) | 2015-01-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420553158.7U Withdrawn - After Issue CN204112205U (en) | 2014-09-24 | 2014-09-24 | The enhancing structure in large span prestressed concrete box beam cross section |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204112205U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104294751A (en) * | 2014-09-24 | 2015-01-21 | 安徽建工集团有限公司 | Reinforcing structure for cross section of large-span prestressed concrete box girder |
| CN105019362A (en) * | 2015-07-09 | 2015-11-04 | 中交第二航务工程局有限公司 | Pier top block of precast beam constructed by stub matching method |
-
2014
- 2014-09-24 CN CN201420553158.7U patent/CN204112205U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104294751A (en) * | 2014-09-24 | 2015-01-21 | 安徽建工集团有限公司 | Reinforcing structure for cross section of large-span prestressed concrete box girder |
| CN105019362A (en) * | 2015-07-09 | 2015-11-04 | 中交第二航务工程局有限公司 | Pier top block of precast beam constructed by stub matching method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20150121 Effective date of abandoning: 20160629 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |