CN112832117A - Connecting method of prefabricated box girder and transition layer and prefabricated box girder structure - Google Patents
Connecting method of prefabricated box girder and transition layer and prefabricated box girder structure Download PDFInfo
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- CN112832117A CN112832117A CN202110008534.9A CN202110008534A CN112832117A CN 112832117 A CN112832117 A CN 112832117A CN 202110008534 A CN202110008534 A CN 202110008534A CN 112832117 A CN112832117 A CN 112832117A
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- box girder
- hook
- transition layer
- steel bars
- main body
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2/00—Bridges characterised by the cross-section of their bearing spanning structure
- E01D2/04—Bridges characterised by the cross-section of their bearing spanning structure of the box-girder type
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- Bridges Or Land Bridges (AREA)
Abstract
The invention relates to a method for connecting a precast box girder and a transition layer, which comprises the following steps: (1) binding the steel bars of the box girder main body; (2) after the binding of the box girder main body steel bars is finished, arranging a plurality of hook steel bars at the top of the box girder main body steel bars, wherein the tops of the hook steel bars penetrate through a box girder top plate and penetrate into a transition layer; (3) and (3) installing a template, pouring concrete, and after initial setting is finished in pouring, roughening the surface of the grout so as to increase the friction force between the grout and the transition layer. According to the method, galling treatment is carried out on the surface of the box girder top plate, meanwhile, a plurality of hook reinforcing steel bars are arranged at the tops of the box girder main body reinforcing steel bars, and the tops of the hook reinforcing steel bars penetrate through the box girder top plate and penetrate into the transition layer, so that the friction force between the hook reinforcing steel bars and the transition layer is increased, the shear strength of the transition layer is enhanced, the requirement that heavy-duty vehicles run on the surface layer of the heavy-duty vehicles can be met, and the durability of the pavement structure layer is improved. In addition, this application still provides a precast box girder structure.
Description
Technical Field
The invention relates to the field of bridge engineering construction, in particular to a connecting method of a prefabricated box girder and a transition layer and a prefabricated box girder structure.
Background
The precast box girder is the most common structural style in the bridge construction, and it is controllable with prefabrication quality, and the installation effectiveness is high and the some is widely designed and applied, generally at precast box girder top transition layer and road surface structure in addition:
in order to be well connected with the transition layer, the top surface of the prefabricated box girder is subjected to galling treatment, so that friction between the prefabricated box girder and the transition layer is improved to a great extent, but a crack is easily generated between the prefabricated box girder and the transition layer due to shear stress under the action of a heavy-load brake, and therefore the connection method of the prefabricated box girder and the transition layer needs to be optimized.
Disclosure of Invention
The invention aims to provide a connecting method of a prefabricated box girder and a transition layer and a prefabricated box girder structure, so as to solve the problems.
In order to achieve the above purpose of the invention, the following technical scheme is adopted:
a connecting method of a precast box girder and a transition layer is characterized by comprising the following steps:
(1) binding the steel bars of the box girder main body;
(2) after the binding of the box girder main body steel bars is finished, arranging a plurality of hook steel bars at the top of the box girder main body steel bars, wherein the tops of the hook steel bars penetrate through a box girder top plate and penetrate into a transition layer;
(3) and (3) installing a template, pouring concrete, and after initial setting is finished in pouring, roughening the surface of the grout so as to increase the friction force between the grout and the transition layer.
Furthermore, a plurality of the hook reinforcing steel bars are arranged on the top of the box girder main body reinforcing steel bar along the transverse direction at equal intervals.
In order to achieve the above object, the present application further provides a prefabricated box girder structure, including a box girder main body, a box girder top plate, a plurality of hook members and a transition layer, the box girder main body steel bars are embedded in the box girder main body, the box girder top plate is installed above the box girder main body, the surface of the box girder top plate is roughened, the transition layer is disposed on the box girder top plate, the bottoms of the plurality of hook members are connected with the tops of the box girder main body steel bars, and the tops of the plurality of hook members penetrate through the box girder top plate and go deep into the transition layer.
Further, the crotch spare includes the body of rod, first crotch and second crotch, the vertical setting of the body of rod, the bottom installation of the body of rod first crotch, first crotch with case roof beam main part reinforcing bar top is connected, the top of the body of rod is passed case roof beam roof board and is deepened in the transition layer, the second crotch setting is in the transition layer and with the top of the body of rod is connected.
Further, the first hook and the second hook are arranged on the same side of the rod body.
Further, the first hook and the second hook and the rod body are of an integral structure.
Further, the rod body is made of steel bars.
Further, the first hook is made of steel bars.
Further, the second hook is made of steel bars.
Further, the rod body, the first hook and the second hook are of an integrated structure.
By adopting the technical scheme, the invention has the following beneficial effects:
according to the method, galling treatment is carried out on the surface of the box girder top plate, meanwhile, a plurality of hook reinforcing steel bars are arranged at the tops of the box girder main body reinforcing steel bars, and the tops of the hook reinforcing steel bars penetrate through the box girder top plate and penetrate into the transition layer, so that the friction force between the hook reinforcing steel bars and the transition layer is increased, the shear strength of the transition layer is enhanced, the requirement that heavy-duty vehicles run on the surface layer of the heavy-duty vehicles can be met, and the durability of the pavement structure layer is improved.
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 some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic view of a precast box girder structure provided by the present invention.
Fig. 2 is a schematic structural view of the hook member provided in the present invention.
Reference numerals: 1-a box girder body; 2-box girder top plate; 3-a hook member; 4-a transition layer; 5-main body steel bars of the box girder; 31-a rod body; 32-a first hook; 33-second hook.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The first embodiment is as follows:
the connecting method of the precast box girder and the transition layer comprises the following steps:
(1) binding the steel bars of the box girder main body;
(2) after the binding of the box girder main body steel bars is finished, arranging a plurality of hook steel bars at the top of the box girder main body steel bars, wherein the tops of the hook steel bars penetrate through a box girder top plate and penetrate into a transition layer;
(3) and (3) installing a template, pouring concrete, ensuring the compactness of the concrete, ensuring the curing to be in place after the pouring is finished, and roughening the surface of the grout after the initial setting is finished so as to increase the friction force between the grout and the transition layer.
Specifically, the top of a plurality of crotch reinforcing bars surpasses box girder roof 5cm to stretch into within the transition layer, be used for strengthening transition layer and box girder's own connected effect and fastness.
Specifically, the distance that the tops of the plurality of hook reinforcing steel bars exceed the box girder top plate is smaller than the thickness of the transition layer.
Example two:
as shown in fig. 1-2, the prefabricated box girder structure that this embodiment two provided, including box girder main part 1, box girder roof 2, a plurality of hook piece 3 and transition layer 4, box girder main part reinforcing bar 5 has been buried in box girder main part 1, box girder roof 2 is installed in box girder main part 1 top, 2 surface napping of box girder roof is handled, transition layer 4 sets up on box girder roof 2, the bottom of a plurality of hook piece 3 is connected with the top of box girder main part reinforcing bar 5, the top of a plurality of hook piece 3 passes box girder roof 2 and goes deep into transition layer 4, thereby strengthen transition layer 4 and box girder main part 1's connected effect and fastness.
Specifically, the hook member 3 includes a rod body 31, a first hook 32 and a second hook 33, the rod body 31 is vertically disposed, the first hook 32 is installed at the bottom of the rod body 31, the first hook 32 is connected with the top of the steel bar 5 of the box girder main body, the top of the rod body 31 penetrates through the top plate 2 of the box girder and extends into the transition layer 4, and the second hook 33 is disposed in the transition layer 4 and connected with the top of the rod body 31.
Example three:
the prefabricated box girder structure provided by the third embodiment is a further improvement of the prefabricated box girder structure provided by the second embodiment, on the basis of the second embodiment and fig. 1-2, the prefabricated box girder structure provided by the third embodiment comprises a box girder main body 1, a box girder top plate 2, a plurality of hook members 3 and a transition layer 4, the box girder main body steel bars 5 are embedded in the box girder main body 1, the box girder top plate 2 is installed above the box girder main body 1, the surface of the box girder top plate 2 is subjected to roughening treatment, the transition layer 4 is arranged on the box girder top plate 2, the bottoms of the hook members 3 are connected with the tops of the box girder main body steel bars 5, and the tops of the hook members 3 penetrate through the box girder top plate 2 and go deep into the transition layer 4, so that the connection effect and firmness of the transition layer 4 and the box girder main body 1 are enhanced.
Specifically, the hook member 3 includes a rod body 31, a first hook 32 and a second hook 33, the rod body 31 is vertically disposed, the first hook 32 is installed at the bottom of the rod body 31, the first hook 32 is connected with the top of the steel bar 5 of the box girder main body, the top of the rod body 31 penetrates through the top plate 2 of the box girder and extends into the transition layer 4, and the second hook 33 is disposed in the transition layer 4 and connected with the top of the rod body 31.
Specifically, the first hook 32 and the second hook 33 are provided on the same side of the rod body 31.
Specifically, the first hook 32 and the second hook 33 are integrally formed with the rod body 31.
Example four:
the prefabricated box girder structure provided by the fourth embodiment is a further improvement of the prefabricated box girder structure provided by the second embodiment, on the basis of the second embodiment and fig. 1-2, the prefabricated box girder structure provided by the fourth embodiment comprises a box girder main body 1, a box girder top plate 2, a plurality of hook members 3 and a transition layer 4, box girder main body steel bars 5 are embedded in the box girder main body 1, the box girder top plate 2 is installed above the box girder main body 1, the surface of the box girder top plate 2 is subjected to roughening treatment, the transition layer 4 is arranged on the box girder top plate 2, the bottoms of the hook members 3 are connected with the tops of the box girder main body steel bars 5, and the tops of the hook members 3 penetrate through the box girder top plate 2 and go deep into the transition layer 4, so that the connection effect and firmness of the transition layer 4 and the box girder main body 1 are enhanced.
Specifically, the hook member 3 includes a rod body 31, a first hook 32 and a second hook 33, the rod body 31 is vertically disposed, the first hook 32 is installed at the bottom of the rod body 31, the first hook 32 is connected with the top of the steel bar 5 of the box girder main body, the top of the rod body 31 penetrates through the top plate 2 of the box girder and extends into the transition layer 4, and the second hook 33 is disposed in the transition layer 4 and connected with the top of the rod body 31.
Specifically, the first hook 32 and the second hook 33 are provided on the same side of the rod body 31.
Specifically, the first hook 32 and the second hook 33 are integrally formed with the rod body 31.
Specifically, the rod body 31 is made of a steel bar.
Specifically, the first hook 32 is made of a steel bar.
Specifically, the second hook 33 is made of a steel bar.
Specifically, the rod body 31, the first hook 32, and the second hook 33 are an integral structure. Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. A connecting method of a precast box girder and a transition layer is characterized by comprising the following steps:
(1) binding the steel bars of the box girder main body;
(2) after the binding of the box girder main body steel bars is finished, arranging a plurality of hook steel bars at the top of the box girder main body steel bars, wherein the tops of the hook steel bars penetrate through a box girder top plate and penetrate into a transition layer;
(3) and (3) installing a template, pouring concrete, and after initial setting is finished in pouring, roughening the surface of the grout so as to increase the friction force between the grout and the transition layer.
2. A method of connecting a precast box girder to a transition layer according to claim 1, wherein a plurality of the hooking reinforcing bars are arranged at equal intervals in a lateral direction on top of the box girder main reinforcing bars.
3. A prefabricated box girder structure is characterized by comprising a box girder main body, a box girder top plate, a plurality of hook members and a transition layer, wherein the box girder main body steel bars are embedded in the box girder main body, the box girder top plate is installed above the box girder main body, the surface of the box girder top plate is subjected to roughening treatment, the transition layer is arranged on the box girder top plate, the bottoms of the hook members are connected with the tops of the box girder main body steel bars, and the tops of the hook members penetrate through the box girder top plate and deeply penetrate into the transition layer.
4. A precast box girder structure according to claim 3, wherein the hooking means comprises a rod body vertically disposed, a first hook installed at the bottom of the rod body and connected to the top of the box girder main body reinforcing bars, and a second hook disposed in the transition layer and connected to the top of the rod body, penetrating the box girder ceiling and penetrating into the transition layer.
5. The precast box girder structure of claim 4, wherein the first hook and the second hook are disposed at the same side of the rod body.
6. The precast box girder structure of claim 4, wherein the first and second hooks are of a unitary structure with the rod body.
7. The precast box girder structure of claim 4, wherein the rod bodies are made of steel bars.
8. The precast box girder structure of claim 4, wherein the first hooks are made of steel bars.
9. The precast box girder structure of claim 4, wherein the second hooks are made of steel bars.
10. The precast box girder structure of claim 4, wherein the rod body, the first hook and the second hook are of an integral structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110008534.9A CN112832117A (en) | 2021-01-05 | 2021-01-05 | Connecting method of prefabricated box girder and transition layer and prefabricated box girder structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110008534.9A CN112832117A (en) | 2021-01-05 | 2021-01-05 | Connecting method of prefabricated box girder and transition layer and prefabricated box girder structure |
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| CN112832117A true CN112832117A (en) | 2021-05-25 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006049377A1 (en) * | 2004-11-08 | 2006-05-11 | Hyosung Lb-Deck Co., Ltd | Bridge slab construction method and lattice bar deck-shaped precast concrete plate applied thereto |
| CN1920176A (en) * | 2005-08-23 | 2007-02-28 | 深圳海川工程科技有限公司 | Deck installation structure of big-span steel bridge |
| CN110468728A (en) * | 2019-09-06 | 2019-11-19 | 中铁第四勘察设计院集团有限公司 | A kind of precast segment spliced girder hole for hoist plugging structure and its construction method |
| CN110983940A (en) * | 2019-11-25 | 2020-04-10 | 清华大学 | Precast concrete box girder bridge and construction method thereof |
| CN111877157A (en) * | 2020-07-31 | 2020-11-03 | 武汉理工大学 | Synergistic shearing-resistant high-durability section steel bridge deck pavement structure and construction method thereof |
-
2021
- 2021-01-05 CN CN202110008534.9A patent/CN112832117A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006049377A1 (en) * | 2004-11-08 | 2006-05-11 | Hyosung Lb-Deck Co., Ltd | Bridge slab construction method and lattice bar deck-shaped precast concrete plate applied thereto |
| CN1920176A (en) * | 2005-08-23 | 2007-02-28 | 深圳海川工程科技有限公司 | Deck installation structure of big-span steel bridge |
| CN110468728A (en) * | 2019-09-06 | 2019-11-19 | 中铁第四勘察设计院集团有限公司 | A kind of precast segment spliced girder hole for hoist plugging structure and its construction method |
| CN110983940A (en) * | 2019-11-25 | 2020-04-10 | 清华大学 | Precast concrete box girder bridge and construction method thereof |
| CN111877157A (en) * | 2020-07-31 | 2020-11-03 | 武汉理工大学 | Synergistic shearing-resistant high-durability section steel bridge deck pavement structure and construction method thereof |
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