CN213681681U - Wet seam joint construction of prefabricated decking - Google Patents
Wet seam joint construction of prefabricated decking Download PDFInfo
- Publication number
- CN213681681U CN213681681U CN202021791625.1U CN202021791625U CN213681681U CN 213681681 U CN213681681 U CN 213681681U CN 202021791625 U CN202021791625 U CN 202021791625U CN 213681681 U CN213681681 U CN 213681681U
- Authority
- CN
- China
- Prior art keywords
- bridge deck
- prefabricated
- concrete
- slab
- wet
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Bridges Or Land Bridges (AREA)
Abstract
The utility model discloses a wet seam joint construction of prefabricated decking, its technical scheme is: the bridge comprises two precast concrete bridge deck plates, wherein concrete is filled between the precast concrete bridge deck plates to form a wet joint; the precast concrete bridge deck is composed of in-slab concrete, longitudinal steel bars and transverse distribution steel bars, wherein the longitudinal steel bars and the transverse distribution steel bars are embedded in the in-slab concrete; the prefabricated concrete bridge deck slab comprises a prefabricated concrete bridge deck slab and is characterized in that one side of the prefabricated concrete bridge deck slab is provided with a conical tooth groove, an annular connecting joint reinforcing steel bar extending out of the end face of the prefabricated concrete bridge deck slab is arranged between every two adjacent conical tooth grooves, and the inner side and the outer side of each annular connecting reinforcing steel bar are provided with transverse penetrating reinforcing steel bars. The utility model discloses offer the tapered tooth's socket and realize connecting between the decking through the annular steel bar at precast concrete decking connection interface, its simple structure, atress are reasonable and pass power reliably, can satisfy various requirements under concrete decking normal use and the bearing capacity extreme condition.
Description
Technical Field
The utility model relates to a bridge engineering technical field especially relates to a wet seam joint construction of prefabricated decking.
Background
The prefabricated bridge realizes rapid construction by factory prefabrication and field installation of the components, obviously improves the quality and production construction efficiency of the bridge components, and is widely concerned by the engineering and academic circles. The prefabricated bridge deck system is characterized in that steel beams and precast concrete bridge decks are manufactured in an industrial mode, erection is conducted on a construction site, longitudinal and transverse seams of the cast-in-place bridge decks are formed after installation is completed, the whole bridge deck is formed, the site operation amount and labor force are greatly reduced, site construction organization can be simplified, and the construction safety is improved.
The bridge deck slab joint structure quantity is numerous, the engineering volume is big, and the reliable connection between the prefabricated bridge deck slab is the important prerequisite of full play prefabricated assembly combination bridge structure advantage. Meanwhile, the wet joint position of the precast slab in the bridge superstructure often becomes the structural weak point of the bridge deck, and the requirements for improving the fatigue performance and the long-term performance are very urgent.
At present, the common steel bar connecting structure at the wet joint of the precast slab is often complex, the requirement on the joint construction precision is high, and the field construction period of the bridge structure is prolonged. Meanwhile, the precast concrete bridge deck and the cast-in-place wet joint generally adopt a plane combination mode, the bonding and meshing performance of the interface of the new concrete and the old concrete is poor, the tensile stress generated by self-shrinkage and drying shrinkage of the cast-in-place concrete can lead the cast-in-place concrete and the old concrete to be bonded and combined to lose efficacy, the weakest interface is cracked, and then rainwater, cleaning water for a sprinkler and the like penetrate into the concrete bridge deck along the crack to cause the corrosion of reinforcing steel bars, so that the durability of the bridge is influenced. In addition, the width of the existing wet joint structure is large, and the on-site concrete pouring amount is large.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a not enough to prior art exists, the utility model aims at providing a wet seam connection structure of prefabricated decking sets up the tapered tooth's socket and realizes connecting between the decking through annular steel bar joint at precast concrete decking connection interface, and its simple structure, atress are reasonable and pass power reliably, can satisfy concrete decking normal use and various requirements under the bearing capacity extreme condition.
In order to achieve the above purpose, the present invention is realized by the following technical solution:
the embodiment of the utility model provides a prefabricated bridge deck wet joint connection structure, which comprises two prefabricated concrete bridge deck boards, wherein concrete is filled between the prefabricated concrete bridge deck boards to form a wet joint; the precast concrete bridge deck is composed of in-slab concrete, longitudinal steel bars and transverse distribution steel bars, wherein the longitudinal steel bars and the transverse distribution steel bars are embedded in the in-slab concrete; the prefabricated concrete bridge deck slab comprises a prefabricated concrete bridge deck slab and is characterized in that one side of the prefabricated concrete bridge deck slab is provided with a conical tooth groove, an annular connecting joint reinforcing steel bar extending out of the end face of the prefabricated concrete bridge deck slab is arranged between every two adjacent conical tooth grooves, and the inner side and the outer side of each annular connecting reinforcing steel bar are provided with transverse penetrating reinforcing steel bars.
As a further implementation mode, a horizontal included angle between the inclined planes at the two sides of the conical tooth grooves and the joint surface is 60-75 degrees.
As a further implementation, the annular connector steel bars are formed by bending end portions of longitudinal steel bars.
As a further implementation mode, the bending radius of the annular connecting joint steel bar is 5-10 times of the diameter of the longitudinal steel bar.
As a further implementation manner, the transversely distributed steel bars and the longitudinal steel bars are connected by binding.
As a further implementation, the annular steel bar connection joints between the two precast concrete deck boards are in staggered lap joint arrangement.
As a further implementation mode, the lap joint length of the annular connecting joint steel bars is 200-450 mm.
As a further implementation mode, the transverse through steel bars are connected with the annular connecting joint steel bars in a binding mode.
As a further implementation, the width of the wet seam is 250mm to 500 mm.
As a further realization, the precast concrete deck slab is a plain concrete slab or a fiber-doped fiber concrete slab.
Above-mentioned the utility model discloses an embodiment's beneficial effect as follows:
(1) the concave-convex junction surface structure of the tapered tooth sockets increases the junction surface area of new and old concrete, and converts normal stress on part of the junction surface into shear stress; the conical tooth grooves effectively control the cracking of a wet joint surface, so that the problems of joint water leakage and steel bar corrosion in the use process in severe environment are solved;
(2) the longitudinal steel bars of one or more embodiments of the utility model are reliably connected through the annular connecting joint steel bars, the annular steel bars are mutually staggered, the hoop effect is generated on the internal concrete, the steel bar anchoring performance is improved, and the wet joint length is reduced; the arrangement of the annular steel bar joint improves the fatigue performance of the steel bars at the joint and improves the service performance of the vehicle under the action of repeated load for a long time; the annular steel bar joints are arranged at the joint positions in a staggered lap joint mode, on-site welding or mechanical connection is not needed, wet joint concrete is directly poured, and the connecting structure of the steel bars at the wet joint positions is greatly simplified;
(3) the conical tooth socket joint surface structure of one or more embodiments of the utility model reduces the width of the wet joint between two adjacent precast concrete bridge decks on the premise of ensuring the anchoring length of the steel bar at the joint, reduces the pouring amount of the on-site wet joint concrete, and improves the construction speed;
(4) the utility model discloses a precast concrete bridge deck of one or more embodiments can be prefabricated in the mill, has reduced the field operation volume.
Drawings
The accompanying drawings, which form a part of the specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without unduly limiting the scope of the invention.
Fig. 1 is a schematic overall structure diagram of the present invention according to one or more embodiments;
FIG. 2 is a schematic illustration of a precast concrete deck structure according to one or more embodiments of the present invention;
fig. 3 is a top view of the present disclosure according to one or more embodiments;
FIG. 4 is a cross-sectional view A-A of FIG. 3;
FIG. 5 is a cross-sectional view B-B of FIG. 3;
wherein, 1, prefabricating a concrete bridge deck; 2. a tapered tooth slot; 3. a decking and wet seam bond interface; 4. concrete filler; 5. connecting joint reinforcing steel bars annularly; 6. transversely penetrating through the steel bar; 7. longitudinal reinforcing steel bars; 8. and transversely distributing reinforcing steel bars.
Detailed Description
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an", and/or "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof;
for convenience of description, the words "up", "down", "left" and "right" when appearing in this application are intended only to designate directions that are consistent with the up, down, left and right directions of the drawings themselves, and not to limit the structure, but merely to facilitate description of the invention and to simplify description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be considered as limiting the application.
The terms "mounted", "connected", "fixed", and the like in the present application should be understood broadly, and for example, the terms "mounted", "connected", and "fixed" may be fixedly connected, detachably connected, or integrated; the two elements may be connected directly or indirectly through an intermediate medium, or the two elements may be connected internally or in an interaction relationship, and those skilled in the art can understand the specific meaning of the above terms in the present invention according to the specific situation.
The first embodiment is as follows:
the embodiment provides a prefabricated bridge deck wet joint connecting structure which is applied to a prefabricated concrete bridge or a steel-concrete composite structure bridge structure; as shown in fig. 1-5, the prefabricated concrete bridge deck comprises a prefabricated concrete bridge deck 1, concrete filler 4, transverse through steel bars 6, longitudinal steel bars 7 and transverse distribution steel bars 8, wherein a plurality of conical tooth sockets 2 are arranged on one side of the prefabricated concrete bridge deck 1.
The precast concrete deck slab 1 is a common concrete slab or a fiber-doped fiber concrete slab. The two precast concrete deck boards 1 are spaced apart and passed through a cast-in-place concrete filler 4 to form a wet joint. After the two precast concrete deck boards 1 are vibrated and maintained to reach the strength, the two precast concrete deck boards are connected into a whole.
In this embodiment the width of the wet seam is 420mm, although in other embodiments the width of the wet seam may be selected in the range 250mm to 500 mm.
Further, the tapered tooth sockets 2 are uniformly arranged along the transverse direction of the precast concrete deck slab 1 (the direction in which the two precast concrete deck slabs 1 are connected is the longitudinal direction). The tapered tooth grooves 2 of the two precast concrete bridge decks 1 are arranged in a staggered mode, and the surfaces of the tapered tooth grooves 2 form a bridge deck and wet joint combination interface 3.
Before concrete filler 4 is poured on the bridge deck and wet joint combination interface 3, chiseling treatment is carried out through manpower, machinery or a high-pressure water gun, so that thick and thin aggregates 1 of the precast concrete bridge deck poured in advance are uniformly exposed on the bridge deck and wet joint combination interface 3.
The width of a wet joint between two precast concrete bridge decks 1 is reduced through the tapered tooth grooves 2, so that the pouring amount of a construction site is reduced. The tapered tooth grooves 2 can increase the contact area between the bridge deck and the wet joint bonding interface 3, so that normal stress borne by part of the bonding surface is converted into shear stress, the bonding and biting force of the bonding surface is improved, and the crack resistance of the concrete wet joint is improved.
Further, the horizontal included angle between the inclined plane of the conical tooth groove 2 and the joint surface is 60-75 degrees, and the horizontal included angle can be specifically determined according to the size of the precast concrete bridge deck 1, the mechanical property, the size of the annular connecting joint reinforcing steel bar 5, the mechanical property of the concrete filler 4 in the wet joint and the like.
Because the tapered tooth sockets 2 of the two precast concrete bridge decks 1 are arranged in a staggered mode, the annular connecting joint reinforcing steel bars 5 are connected at the wet joint in a lap joint mode, the integrity of the wet joint and the precast concrete bridge decks 1 can be effectively improved, and the fatigue property of the wet joint is improved.
The lap length of annular coupling joint reinforcing bar 5 can adjust at 200 ~ 450mm within range, and in this embodiment, the lap length of annular coupling joint reinforcing bar 5 sets up to 370 mm. The precast concrete bridge deck slab 1 is internally provided with transverse distribution reinforcing steel bars 8 which are uniformly distributed, and the transverse distribution reinforcing steel bars 8 are connected with the longitudinal reinforcing steel bars 7 through binding. The spacing and the number of the longitudinal steel bars 7 and the transverse distribution steel bars 8 can be adjusted according to specific requirements, and in the embodiment, the spacing between the adjacent longitudinal steel bars 7 and the adjacent transverse distribution steel bars 8 is 150mm respectively.
The inside and outside of annular joint connection reinforcing bar 5 sets up horizontal through reinforcement 6 respectively, can increase the bonding property between annular joint connection reinforcing bar 5 and the concrete filler 4, further improves the reliability of wet seam connection. The number of rows and the total number of the transverse penetrating steel bars 6 can be adjusted according to specific requirements. And the transverse through reinforcing steel bars 6 are bound with the annular connecting joint reinforcing steel bars 5. In this embodiment, two rows of 4 transverse penetrating rebars 6 are respectively disposed inside and outside the ring-shaped connector rebars 5.
According to the embodiment, on the premise of ensuring the anchoring length of the steel bars at the joint, the pouring amount of on-site wet joint concrete is reduced; the area of the joint surface of the new and old concrete is increased, normal stress borne by part of the joint surface is converted into shear stress, and the cracking risk is reduced.
The construction process of the embodiment is as follows:
firstly, bending the end part of a longitudinal steel bar 7 by 180 degrees in a factory to form a ring-shaped connecting joint steel bar 5, then placing the longitudinal steel bar 7 and a transverse distribution steel bar 8 in a steel bar template according to a design interval, and binding through steel wires to form a steel bar cage.
And then, hoisting the reinforcement cage into the prefabricated template, and pouring concrete to form the prefabricated concrete bridge deck 1 with the tapered tooth sockets 2. And maintaining and storing according to the standard requirement; and after the corresponding age is reached, chiseling the bridge deck and the wet joint combination interface 3 to meet the standard. The aggregate engaging force at the wet joint of the bridge deck is enhanced through roughening treatment, the problem of discontinuous force transmission at the wet joint caused by different ages of new and old concrete is solved, the method has obvious advantages for avoiding or controlling the cracking of the concrete of the joint face, and the crack resistance of the wet joint interface is obviously improved.
During site operation, the precast concrete deck slab 1 is transported to a construction site, hoisted to the upper side of the main beam for placement, and a pouring template is laid below the joint. The annular connecting joint reinforcing steel bars 5 of the two precast concrete bridge decks 1 are positioned and butted, and then the transverse penetrating reinforcing steel bars 6 are placed and bound with the annular connecting joint reinforcing steel bars 5.
Finally, the concrete filler 4 in the wet joint is poured, and the concrete is cured for a set time to form the final wet joint connection structure.
The embodiment does not need a complex construction process, is convenient for industrial production and field assembly and construction, has good practical value and economic benefit, and especially has wide application prospect in small and medium span bridges adopting precast concrete deck slabs.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (10)
1. A prefabricated bridge deck wet joint connection structure is characterized by comprising two prefabricated concrete bridge decks, wherein concrete is filled between the prefabricated concrete bridge decks to form a wet joint; the precast concrete bridge deck is composed of in-slab concrete, longitudinal steel bars and transverse distribution steel bars, wherein the longitudinal steel bars and the transverse distribution steel bars are embedded in the in-slab concrete; the prefabricated concrete bridge deck slab comprises a prefabricated concrete bridge deck slab and is characterized in that one side of the prefabricated concrete bridge deck slab is provided with a conical tooth groove, an annular connecting joint reinforcing steel bar extending out of the end face of the prefabricated concrete bridge deck slab is arranged between every two adjacent conical tooth grooves, and the inner side and the outer side of each annular connecting reinforcing steel bar are provided with transverse penetrating reinforcing steel bars.
2. The wet joint connection structure of a prefabricated bridge deck slab as claimed in claim 1, wherein a horizontal included angle between the inclined surfaces of both sides of the tapered tooth grooves and the bonding surface is 60-75 °.
3. A prefabricated bridge deck wet-seam connection construction according to claim 1, wherein said annular connector bars are formed by bending longitudinal bar ends.
4. A prefabricated bridge deck wet-seam connection construction according to claim 3, wherein the bending radius of the ring-shaped connecting joint reinforcing bars is 5-10 times the diameter of the longitudinal reinforcing bars.
5. A prefabricated bridge deck wet-seam connection structure according to claim 1, wherein a lashed connection is used between said transversely distributed reinforcing bars and said longitudinal reinforcing bars.
6. A prefabricated bridge deck wet-seam connection construction according to claim 1, wherein the annular reinforcing bar connecting joints between two prefabricated concrete bridge decks are in a staggered lap-joint arrangement.
7. A prefabricated bridge deck wet joint connection structure according to claim 6, wherein the lap length of the ring-shaped connecting joint reinforcing steel bars is 200-450 mm.
8. A prefabricated bridge deck wet-seam connection structure according to claim 1, wherein a lashed connection is adopted between said transverse through reinforcement and said annular connecting joint reinforcement.
9. A prefabricated bridge deck wet-seam connection construction according to claim 1, wherein the width of the wet seam is 250-500 mm.
10. A prefabricated bridge deck wet-seam connection construction according to claim 1, wherein said prefabricated concrete bridge deck is a plain concrete slab or a fiber-doped fiber concrete slab.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021791625.1U CN213681681U (en) | 2020-08-24 | 2020-08-24 | Wet seam joint construction of prefabricated decking |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021791625.1U CN213681681U (en) | 2020-08-24 | 2020-08-24 | Wet seam joint construction of prefabricated decking |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213681681U true CN213681681U (en) | 2021-07-13 |
Family
ID=76745623
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021791625.1U Active CN213681681U (en) | 2020-08-24 | 2020-08-24 | Wet seam joint construction of prefabricated decking |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213681681U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113957782A (en) * | 2021-08-20 | 2022-01-21 | 上海市政工程设计研究总院（集团）有限公司 | Bent cap structure adopting double-main-beam prefabrication and assembly method and construction method thereof |
-
2020
- 2020-08-24 CN CN202021791625.1U patent/CN213681681U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113957782A (en) * | 2021-08-20 | 2022-01-21 | 上海市政工程设计研究总院（集团）有限公司 | Bent cap structure adopting double-main-beam prefabrication and assembly method and construction method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112127263A (en) | Prefabricated bridge deck wet joint connecting structure, prefabricated bridge and method | |
| CN102704386B (en) | Prefabricated component assembly type segment assembling corrugated steel web RPC (Reactive Powder Concrete) combination box girder and method therefor | |
| CN105862538A (en) | Assembling type inclined slow-adhesion pre-stressed concrete road surface structure | |
| CN109914216B (en) | Assembled large-span ultra-high-performance concrete box girder combined node and connecting method thereof | |
| CN110952446A (en) | From wet seam continuous construction of ultra high performance concrete combination beam decking of taking template | |
| CN205711596U (en) | Assembled oblique bond-retarded prestressed concrete pavement structure | |
| CN109610310B (en) | Profile steel-UHPC combined bridge deck structure suitable for cantilever state and construction method thereof | |
| CN111749149B (en) | Transverse prestress steel wire rope reinforcing structure of assembled hollow slab girder bridge and construction method | |
| CN103711330A (en) | Method for using prefabricated reinforced concrete frame to reinforce existing structure through prestressing assembly | |
| CN111021227B (en) | Steel-concrete composite structure continuous box girder and manufacturing method thereof | |
| CN106760108A (en) | A kind of prefabricated overlapping board connecting equipment | |
| CN110331649B (en) | Transverse joint system for prefabricated steel-concrete composite beam | |
| CN213681681U (en) | Wet seam joint construction of prefabricated decking | |
| CN109989478A (en) | A kind of precast prestressed concrete frame structure | |
| CN111719693A (en) | Prestress assembly type steel-concrete sleeved beam-column joint | |
| CN110468708B (en) | Combined bridge deck structure of steel-UHPC precast slab and construction method thereof | |
| CN110331648B (en) | Ultra-high-performance concrete-part section steel composite beam unit, ultra-high-performance concrete-section steel composite beam unit and composite beam | |
| CN209907689U (en) | Prefabricated member of floor member unit assembly | |
| CN219410510U (en) | Steel-ultra-high performance concrete composite structure | |
| CN217869978U (en) | Steel-concrete combined bridge deck and wet seam structure thereof | |
| CN204781443U (en) | Device for connecting precast shear wall concatenation about being used for | |
| CN216338993U (en) | Longitudinal joint for steel-UHPC (ultra high performance concrete) assembled pi-shaped combination beam | |
| CN110539398A (en) | Construction method of prefabricated bridge deck steel-concrete composite beam | |
| CN215978030U (en) | Novel assembled concrete slab structure | |
| CN215977671U (en) | Large-span prestressed concrete assembled frame connected node |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |