CN216839162U - Lifting transformation device based on existing concrete anti-collision guardrail - Google Patents
Lifting transformation device based on existing concrete anti-collision guardrail Download PDFInfo
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- CN216839162U CN216839162U CN202220264266.7U CN202220264266U CN216839162U CN 216839162 U CN216839162 U CN 216839162U CN 202220264266 U CN202220264266 U CN 202220264266U CN 216839162 U CN216839162 U CN 216839162U
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Abstract
The utility model discloses a lifting transformation device based on the existing concrete crash barrier, which comprises an original crash barrier, wherein a plurality of prefabricated thin-wall UHPC protective housings are arranged on the original crash barrier, and light foam concrete layers are poured between the original crash barrier and the prefabricated thin-wall UHPC protective housings and are fixedly connected through the light foam concrete layers; and a stiffening grid is fixedly connected to the inner side of the prefabricated thin-wall UHPC protective shell. The utility model discloses a lifting transformation device and method has following advantage: the structure is simple, and the stress is definite; the prefabricated thin-wall UHPC protective shell is convenient and quick to assemble and construct; has the function of energy dissipation, protects and utilizes the original structure to the maximum extent; the waste engineering quantity is small, and the method is low-carbon and environment-friendly; the replacement and the repair are convenient; low cost and good economical efficiency. The utility model discloses avoided the former concrete guardrail of vehicle direct striking, reduced the internal force of vehicle striking to former concrete guardrail and decking to furthest protects and utilizes the primary structure, and the primary structure can not consolidate or consolidate less.
Description
Technical Field
The utility model relates to a crash barrier technical field, more specifically say so and relate to a promotion transformation device based on existing concrete crash barrier.
Background
The early-built concrete guardrail does not meet the requirement of the existing standard of design Specification for road traffic safety facilities (JTG D81) due to the lower original design standard, and needs to be improved and modified so as to meet the requirement of improving the anti-collision grade. The conventional concrete guardrail lifting and reforming mode mainly comprises the following steps: the concrete guardrail heightening, dismantling and rebuilding and the like, the two schemes are controlled by the bearing capacity of the original guardrail and the bridge deck structure, when the bearing capacity of the original structure does not meet the requirements of the heightened guardrail dead load and collision load, the original structure needs to be reinforced, and the problems of complex working procedures, high manufacturing cost and the like exist. Therefore, how to carry out scientific and reasonable improvement and transformation on the existing guardrail on the basis of protecting and utilizing the guardrail at the present situation to the maximum extent so as to achieve the purposes of safety, durability, economy, reasonability, low carbon and environmental protection is a problem which needs to be solved urgently at present.
Therefore, how to provide a lifting transformation device based on the existing concrete crash barrier is one of the technical problems to be solved urgently in the field.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model provides a promote and reform transform device based on existing concrete anticollision barrier. The purpose is to solve the above-mentioned deficiency and offer.
In order to solve the technical problem, the utility model discloses following technical scheme has been taken:
a lifting transformation device based on an existing concrete anti-collision guardrail comprises an original anti-collision guardrail, wherein a plurality of prefabricated thin-wall type UHPC protective shells are arranged on the original anti-collision guardrail, and light foam concrete layers are poured between the original anti-collision guardrail and the prefabricated thin-wall type UHPC protective shells and are fixedly connected through the light foam concrete layers; the prefabricated thin-wall UHPC protective shell is provided with stiffening plates, and the prefabricated thin-wall UHPC protective shell and the stiffening grids are integrally prefabricated;
the part, connected with the top end wall of the original anti-collision guardrail, of the prefabricated thin-wall UHPC protective shell is provided with a grouting hole for pouring light foam concrete, and one side, close to the grouting hole, of the prefabricated thin-wall UHPC protective shell is fixedly connected with the original anti-collision guardrail through a fixing piece; and a stiffening grid is arranged at the part of the prefabricated thin-wall UHPC protective shell connected with the inner side wall of the original anti-collision guardrail, and the stiffening grid is positioned inside the light foam concrete layer.
Preferably, the prefabricated thin-wall UHPC protective shell is of an F-shaped structure or a single-slope structure with a climbing threshold.
Preferably, the fixing is a chemical anchor.
Preferably, one side, close to the grouting hole, of the prefabricated thin-wall UHPC protective shell is provided with a bolt hole matched with the chemical anchor bolt; and the prefabricated thin-wall UHPC protective shell penetrates through the bolt hole through the chemical anchor bolt and is fixedly connected with the top end wall of the original anti-collision guardrail.
Preferably, the stiffening grids include end stiffening grids and intermediate stiffening grids; the end stiffening grids are arranged to be L-shaped, and the middle stiffening grids are arranged to be convex.
Preferably, a groove body is arranged at the position, close to the lower end of the prefabricated thin-wall UHPC protective shell, of the edge of the pavement.
Preferably, the prefabricated thin-wall UHPC protective shell is bonded with the upper end of the original anti-collision guardrail through a base slurry layer; correspondingly, a seat slurry layer is also arranged in the groove body.
Preferably, the two adjacent prefabricated thin-wall UHPC protective shells are sealed by epoxy splicing glue.
Preferably, the thin-wall UHPC protective shell is prefabricated by factory segments, the length of a standard segment can be customized according to needs, and the standard segment is generally 2-6 m for convenient lifting; and (4) the prefabricated standard segment is transported to the site and then is installed in place.
Preferably, the thin-walled UHPC protective shell can be used with standard segment lengths of 3m, 4 m.
Preferably, the prefabricated thin-wall UHPC protective shell is made of ultra-high-performance concrete, and after standard curing for 28 days, the compressive strength is more than or equal to 120MPa, the ultimate tensile strength is more than or equal to 8MPa, and the elastic modulus is 45-55 GPa.
Preferably, the performance index of the lightweight foam concrete layer is required to be executed according to technical Specification for foam concrete application (JGJ/T341), and a dry density grade A10, a strength grade FC 10; and the light foam concrete is of a porous structure, has the characteristics of low density, low elastic modulus and the like, can play a role in buffering and energy dissipation, and simultaneously strengthens the connection between the thin-wall UHPC protective shell and the original concrete guardrail.
Preferably, the chemical anchor has the requirements: (1) adopting a stainless steel anchor bolt, wherein the grade is 80 grade, the standard value of the tensile strength is 800MPa, and the standard value of the yield strength is 600 MPa; (2) the diameter of the anchor bolt is preferably M12-M20, and the longitudinal arrangement distance is about 1.0M; (3) the anchor bolt drilling depth is more than or equal to 10d, and the steel bars in the original anti-collision guardrail are avoided when drilling.
The utility model discloses for prior art gain following technological effect:
the utility model discloses this promote and reform transform device has following advantage: the structure is simple, and the stress is clear; prefabricated assembly construction is convenient and quick; thirdly, the energy dissipation effect is achieved, and the original structure is protected and utilized to the maximum extent; fourthly, the waste engineering quantity is small, and the low carbon and environmental protection are realized; the repair is convenient and replaceable; sixthly, the cost is low and the economy is good.
The utility model discloses an adopt the composite construction that prefabricated thin wall formula UHPC guardrail and light foam concrete layer are constituteed, avoided the original concrete guardrail of vehicle direct impact, reduced the internal force of vehicle striking to original concrete guardrail and decking to furthest protects and utilizes original structure, and original structure can not consolidate or consolidate less.
Drawings
Fig. 1 is a schematic three-dimensional structure diagram of a lifting transformation device based on an existing concrete crash barrier of the present invention;
fig. 2 is a schematic sectional structure view of a lifting transformation device based on an existing concrete crash barrier of the present invention;
fig. 3 is a schematic structural view of an F-shaped prefabricated thin-walled UHPC protective shell with a climbing sill of a lifting transformation device based on an existing concrete crash barrier;
fig. 4 and 5 are schematic structural diagrams of a 4m standard prefabricated thin-walled UHPC protective shell of a lifting transformation device based on an existing concrete crash barrier according to the present invention;
fig. 6 is a schematic structural view of a reinforcing rib of a lifting transformation device based on an existing concrete crash barrier of the present invention;
fig. 7 and 8 are schematic structural views of a 3m standard prefabricated thin-walled UHPC protective shell of a lifting transformation device based on an existing concrete crash barrier according to the present invention;
fig. 9 is a schematic structural view of a single-slope prefabricated thin-walled UHPC protective shell of the lifting transformation device based on the existing concrete crash barrier of the present invention;
fig. 10 is a schematic structural view of a conventional crash barrier.
In the figure: 1. original anti-collision guard rails; 2. prefabricating a thin-wall UHPC protective shell; 21. a stiffening grid; 211. an end stiffening grid; 212. a middle stiffening grid; 22. grouting holes; 23. bolt holes; 3. a light foam concrete layer; 4. a stiffening plate; 5. a fixing member; 6. a base slurry layer; 7. a trough body; 8. a steel handrail.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Examples
Referring to fig. 1, the lifting transformation device based on the existing concrete crash barrier comprises an original crash barrier 1), wherein a plurality of prefabricated thin-wall type UHPC protective cases 2 are arranged on the original crash barrier 1, and light foam concrete layers 3 are poured between the original crash barrier 1 and the prefabricated thin-wall type UHPC protective cases 2 and are fixedly connected through the light foam concrete layers 3; the upper end of the prefabricated thin-wall UHPC protective shell 2 is also provided with a stiffening plate 4, and the inner side of the prefabricated thin-wall UHPC protective shell is also provided with a stiffening grid 21;
the prefabricated thin-wall UHPC protective shell 2 is connected with the top end wall of the original anti-collision guardrail 1 and is provided with a grouting hole 22 for pouring light foam concrete, and one side close to the grouting hole 22 is fixedly connected with the original anti-collision guardrail 1 through a chemical anchor bolt; the connection part of the prefabricated thin-wall UHPC protective shell 2 and the inner side wall of the original anti-collision guardrail 1 is provided with a stiffening grid 21, and the stiffening grid 21 is positioned inside the light foam concrete layer 3.
In this embodiment, the prefabricated thin-walled UHPC protective shell 2 is of an F-shaped structure or a single-slope structure with a climbing threshold.
In the embodiment, a bolt hole 23 matched with a chemical anchor bolt is arranged on one side, close to a grouting hole 22, of the prefabricated thin-wall UHPC protective shell 2; the prefabricated thin-wall UHPC protective shell 2 is fixedly connected with the top end wall of the original anti-collision guardrail 1 through a chemical anchor bolt penetrating through the bolt hole 23.
In this embodiment, the stiffening grids 21 include end stiffening grids 211 and intermediate stiffening grids 212; the end stiffener 211 is provided in an L-shape and the intermediate stiffener 212 is provided in a convex shape.
In this embodiment, a groove 7 is formed at a position of the edge of the road surface close to the lower end of the prefabricated thin-wall UHPC protective shell 2.
In the embodiment, a prefabricated thin-wall UHPC protective shell 2 is bonded with the upper end of an original anti-collision guardrail 1 through a base slurry layer 6; correspondingly, the tank body 7 is also internally provided with a seat slurry layer 6.
In this embodiment, the two adjacent prefabricated thin-walled UHPC protective cases 2 are sealed by epoxy joint compound.
In this embodiment, a standard segment length of 3m, 4m can be used for the thin walled UHPC protective shell 2.
In the embodiment, the prefabricated thin-wall UHPC protective shell 2 is made of ultra-high performance concrete, and after standard curing for 28 days, the compressive strength is more than or equal to 120MPa, the ultimate tensile strength is more than or equal to 8MPa, and the elastic modulus is 45-55 GPa.
In this embodiment, the performance index of the lightweight foam concrete layer 3 is required to be executed according to the technical specification of foam concrete application (JGJ/T341), and a dry density grade a10 and a strength grade FC10 can be generally adopted; and the light foam concrete is of a porous structure, has the characteristics of low density, low elastic modulus and the like, can play a role in buffering and energy dissipation, and simultaneously strengthens the connection between the thin-wall UHPC protective shell and the original concrete guardrail.
In this example, the requirements of the chemical anchor are: (1) adopting a stainless steel anchor bolt, wherein the grade is 80 grade, the standard value of the tensile strength is 800MPa, and the standard value of the yield strength is 600 MPa; (2) the diameter of the anchor bolt is preferably M12-M20, and the longitudinal arrangement distance is about 1.0M; (3) the anchor bolt drilling depth is more than or equal to 10d, and the steel bars in the original anti-collision guardrail are avoided when drilling.
In some embodiments, the thin-wall UHPC protective shell 2 is prefabricated by factory segments, the length of the standard segment can be customized according to the requirement, and the standard segment is generally 2-6 m for convenient lifting; and (4) carrying the prefabricated standard segment to the site and then installing the prefabricated standard segment in place.
In some embodiments, the number and size of the prefabricated thin walled UHPC protective shell 2 can be adjusted as needed.
The utility model discloses this promote and reform transform device has following advantage: the structure is simple, and the stress is clear; prefabricated assembly construction is convenient and quick; thirdly, the energy dissipation effect is achieved, and the original structure is protected and utilized to the maximum extent; fourthly, the waste engineering quantity is small, and the low carbon and environmental protection are realized; the repair is convenient and replaceable; sixthly, the cost is low and the economy is good.
The utility model discloses an adopt the composite construction that prefabricated thin wall formula UHPC guardrail and light foam concrete layer are constituteed, avoided the original concrete guardrail of vehicle direct impact, reduced the internal force of vehicle striking to original concrete guardrail and decking to furthest protects and utilizes original structure, and original structure can not consolidate or consolidate less.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the technical scope of the present invention, so that any slight modifications, equivalent changes and modifications made by the technical spirit of the present invention to the above embodiments are all within the scope of the technical solution of the present invention.
Claims (8)
1. A lifting transformation device based on an existing concrete anti-collision guardrail comprises an original anti-collision guardrail (1), and is characterized in that a plurality of prefabricated thin-wall type UHPC protective shells (2) are arranged on the original anti-collision guardrail (1), and light foam concrete layers (3) are poured between the original anti-collision guardrail (1) and the prefabricated thin-wall type UHPC protective shells (2) and fixedly connected through the light foam concrete layers (3); the upper end of the prefabricated thin-wall UHPC protective shell (2) is also fixedly connected with a stiffening plate (4);
the prefabricated thin-wall UHPC protective shell (2) is connected with the top end wall of the original anti-collision guardrail (1) and is provided with a grouting hole (22) for pouring light foam concrete, and one side close to the grouting hole (22) is fixedly connected with the original anti-collision guardrail (1) through a fixing piece (5); the prefabricated thin-wall UHPC protective shell (2) and the part connected with the inner side wall of the original anti-collision guardrail (1) are provided with stiffening grids (21), and the stiffening grids (21) are positioned inside the light foam concrete layer (3).
2. The lifting transformation device based on the existing concrete crash barrier as recited in claim 1, characterized in that the prefabricated thin-walled UHPC protective shell (2) adopts an F-shaped structure or a single-slope structure with a climbing sill.
3. A lifting transformation device based on an existing concrete crash barrier according to claim 1, characterized in that the fixing (5) is a chemical anchor bolt.
4. The lifting transformation device based on the existing concrete crash barrier as recited in claim 3, characterized in that a bolt hole (23) matched with the chemical anchor bolt is arranged on one side of the prefabricated thin-wall UHPC protective shell (2) close to the grouting hole (22); the prefabricated thin-wall UHPC protective shell (2) penetrates through the bolt holes (23) through the chemical anchor bolts to be fixedly connected with the top end wall of the original anti-collision guardrail (1).
5. A lifting retrofit installation based on an existing concrete crash barrier according to claim 1 characterized in that said stiffening grid (21) comprises end stiffening grids (211) and intermediate stiffening grids (212); the end stiffening grids (211) are arranged to be L-shaped, and the intermediate stiffening grids (212) are arranged to be convex.
6. The lifting transformation device based on the existing concrete crash barrier as recited in claim 1, characterized in that a groove (7) is opened at the position of the road surface edge near the lower end of the prefabricated thin-wall type UHPC protective shell (2).
7. The lifting reconstruction device based on the existing concrete crash barrier as claimed in claim 6, characterized in that the prefabricated thin-wall UHPC protective shell (2) is bonded with the upper end of the original crash barrier (1) through a grout layer (6); correspondingly, a seat slurry layer (6) is also arranged in the groove body (7).
8. The lifting transformation device based on the existing concrete crash barrier as recited in claim 1, characterized in that the joint sealing treatment between two adjacent prefabricated thin-walled UHPC protective cases (2) is performed by using epoxy jointing glue.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220264266.7U CN216839162U (en) | 2022-02-09 | 2022-02-09 | Lifting transformation device based on existing concrete anti-collision guardrail |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220264266.7U CN216839162U (en) | 2022-02-09 | 2022-02-09 | Lifting transformation device based on existing concrete anti-collision guardrail |
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| Publication Number | Publication Date |
|---|---|
| CN216839162U true CN216839162U (en) | 2022-06-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220264266.7U Active CN216839162U (en) | 2022-02-09 | 2022-02-09 | Lifting transformation device based on existing concrete anti-collision guardrail |
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| CN (1) | CN216839162U (en) |
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- 2022-02-09 CN CN202220264266.7U patent/CN216839162U/en active Active
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