CN110872813A - Precast concrete guardrail connecting structure and assembling method - Google Patents
Precast concrete guardrail connecting structure and assembling method Download PDFInfo
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- CN110872813A CN110872813A CN201911321889.2A CN201911321889A CN110872813A CN 110872813 A CN110872813 A CN 110872813A CN 201911321889 A CN201911321889 A CN 201911321889A CN 110872813 A CN110872813 A CN 110872813A
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- precast concrete
- guardrail
- flange plate
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- main beam
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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
- E01D19/10—Railings; Protectors against smoke or gases, e.g. of locomotives; Maintenance travellers; Fastening of pipes or cables to bridges
- E01D19/103—Parapets, railings ; Guard barriers or road-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
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
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Abstract
The invention relates to a precast concrete guardrail connecting structure and an assembling method, wherein the connecting structure comprises a main beam flange plate and a precast concrete guardrail vertical to the transverse outer side of the main beam flange plate; the end part of the main girder flange plate is respectively provided with a main girder flange plate inner side reserved short steel bar and a main girder flange plate outer side reserved long steel bar which vertically extend out of the surface of the main girder flange plate; the inner side surface of the precast concrete guardrail is provided with an embedded steel plate which is welded and fixed with the reserved short steel bars on the inner side of the main beam flange plate; the outside of the precast concrete guardrail is provided with a vertical guardrail reserved anchoring pore passage, and the outside of the main beam flange plate is reserved with a long steel bar which is inserted into the guardrail reserved anchoring pore passage and is fixed through grouting. In the invention, the welding foundation steel bar and the anchor bolt are adopted for connection, so that the operation is simple, the connection is convenient and quick, and the connection tolerance is large. And the bearing capacity is better, the hoisting and transportation are convenient, the durability is good, the construction risk is small, and the applicability is strong. Because prefabricated festival section both ends are equipped with the section of putting more energy into, can directly connect with the dowel steel, and easy operation easily realizes.
Description
Technical Field
The invention relates to the technical field of precast concrete guardrails, in particular to a precast concrete guardrail connecting structure and an assembling method.
Background
The prefabricated guardrail has the advantages that ① factory prefabrication is adopted, stable operators and matched processing equipment are provided, the processing precision and the appearance quality are obviously improved due to small external interference factors, ② carries a large amount of high-noise, high-pollution and high-risk wet operation into a factory, 80% of building waste is reduced, the influence of field pouring construction on peripheral noise, dust and the like is greatly reduced, ③ cast-in-place requires 3-5 days, the prefabricated assembly construction can be finished in 1 day, most of work is transferred to the factory, the risk of the field operation of the operators is greatly reduced, ④ prefabricated anti-collision walls can embed street lamp pipelines, lamp posts, embedded parts, railing embedded parts, communication pipelines, electric boxes and the like, the quality and the precision are improved, and the construction period is shortened.
Disclosure of Invention
The invention aims to provide a precast concrete guardrail connecting structure and an assembling method, which can reduce the construction risk and accelerate the construction efficiency.
The technical scheme adopted by the invention is as follows:
precast concrete guardrail joint construction, its characterized in that:
the connecting structure comprises a main beam flange plate and a prefabricated concrete guardrail vertically arranged on the transverse outer side of the main beam flange plate;
the end part of the main girder flange plate is respectively provided with a main girder flange plate inner side reserved short steel bar and a main girder flange plate outer side reserved long steel bar which vertically extend out of the surface of the main girder flange plate;
the inner side surface of the precast concrete guardrail is provided with an embedded steel plate which is welded and fixed with the reserved short steel bars on the inner side of the main beam flange plate; the outside of the precast concrete guardrail is provided with a vertical guardrail reserved anchoring pore passage, and the outside of the main beam flange plate is reserved with a long steel bar which is inserted into the guardrail reserved anchoring pore passage and is fixed through grouting.
Be provided with the steel sheet anchor reinforcing bar in the precast concrete guardrail, pre-buried steel sheet welds in steel sheet anchor reinforcing bar and is anchored inside precast concrete guardrail.
The bridge deck is arranged above the girder flange plates, a longitudinal gap is reserved between the outer ends of the bridge deck and the inner side faces of the precast concrete guardrails, and concrete is poured to form a post-pouring belt.
The precast concrete guardrail is precast in sections in the longitudinal direction, and each section comprises stiffening parts at two ends in the longitudinal direction and a standard part in the middle; the standard part is provided with a longitudinal flower groove; the stiffening part is provided with a lightening hole.
The stiffening part of each section of the precast concrete guardrail is provided with a longitudinal hole, and the adjacent sections are longitudinally connected through a dowel bar arranged at the position of the hole;
the dowel bar is a stainless steel screw rod, and the end part of the dowel bar is fixed through a nut.
The outer side of the bottom surface of the precast concrete guardrail is provided with a limiting part extending downwards, and the inner side surface of the limiting part abuts against the outer end surface of the main beam flange plate.
And a mortar cushion layer is arranged between the bottom surface of the precast concrete guardrail and the surface of the main beam flange plate.
The inner wall of the reserved anchoring pore passage of the guardrail is provided with a corrugated pipe.
The assembling method of the precast concrete guardrail connecting structure is characterized by comprising the following steps of:
the method comprises the following steps:
the method comprises the following steps: the method comprises the following steps of prefabricating the concrete guardrail in sections, presetting a vertical guardrail reserved anchoring pore passage on the outer side of the precast concrete guardrail, and presetting a pre-buried steel plate on the inner side;
step two: respectively presetting short reinforcing steel bars reserved on the inner side of the main girder flange plate and long reinforcing steel bars reserved on the outer side of the main girder flange plate at the end part of the main girder flange plate, and vertically extending out of the surface of the main girder flange plate;
step three: hoisting the precast concrete guardrail to the end part of the main girder flange plate, welding the reserved short steel bars on the inner side of the main girder flange plate with the two sides of the embedded steel plate, inserting the reserved long steel bars on the outer side of the main girder flange plate into the reserved anchoring pore of the guardrail and pouring slurry to anchor the guardrail;
step four: constructing the next section of precast concrete guardrail, and connecting the sections by adopting dowel bars;
step five: and a longitudinal gap is reserved between the outer end of the bridge deck above the girder flange plate and the inner side surface of the precast concrete guardrail, and concrete is poured to form a post-pouring belt.
The invention has the following advantages:
in the invention, the welding foundation steel bar and the anchor bolt are adopted for connection, so that the operation is simple, the connection is convenient and quick, and the connection tolerance is large. And the bearing capacity is better, the hoisting and transportation are convenient, the durability is good, the construction risk is small, and the applicability is strong. Because prefabricated festival section both ends are equipped with the section of putting more energy into, can directly connect with the dowel steel, and easy operation easily realizes.
Drawings
Fig. 1 is a structural view of a standard portion connection structure.
Fig. 2 is a structural view of a connection structure of a stiffening part.
FIG. 3 is a schematic view of a partial macro-pattern A-A.
Fig. 4 is an elevation view of the connection configuration.
In the figure: 1-girder flange plate; 2, prefabricating a concrete guardrail; 3, post-pouring a belt; 4, reserving short steel bars on the inner side of the flange plate of the main girder; 5, reserving long steel bars outside the flange plates of the main girder; 6, pre-burying a steel plate; 7, anchoring steel bars by steel plates; 8, reserving an anchoring pore passage on the guardrail; 9-bridge deck; 10-dowel bar.
Detailed Description
The present invention will be described in detail with reference to specific embodiments.
The invention relates to a precast concrete guardrail connecting structure, which comprises a girder flange plate 1 and a precast concrete guardrail 2 vertical to the transverse outer side of the girder flange plate; the end part of the main girder flange plate 1 is respectively provided with a main girder flange plate inner side reserved short steel bar 4 and a main girder flange plate outer side reserved long steel bar 3 which vertically extend out of the surface of the main girder flange plate 1; the inner side surface of the precast concrete guardrail 2 is provided with an embedded steel plate 6 which is welded and fixed with the reserved short steel bars 4 on the inner side of the main beam flange plate; the outside of precast concrete guardrail 2 is provided with vertical guardrail and reserves anchor pore 8, and girder flange plate outside is reserved long reinforcing bar 3 and is inserted the guardrail and reserves anchor pore 8 and realize fixing through the grout, and 8 inner walls in guardrail reservation anchor pore are provided with the bellows.
Be provided with steel sheet anchor reinforcing bar 7 in the precast concrete guardrail 2, pre-buried steel sheet 6 welds in steel sheet anchor reinforcing bar 7 and is anchored inside precast concrete guardrail 2.
The bridge deck plate 9 is arranged above the girder flange plate 1, a longitudinal gap is reserved between the outer end of the bridge deck plate 9 and the inner side surface of the precast concrete guardrail 2, and concrete is poured to form a post-pouring belt 3.
The precast concrete guardrail 2 is precast in sections in the longitudinal direction, and each section comprises stiffening parts at two ends in the longitudinal direction and a standard part in the middle; the standard part is provided with a longitudinal flower groove; the stiffening part is provided with a lightening hole. The stiffening part of each section of the precast concrete guardrail 2 is provided with a longitudinal hole, and the adjacent sections are longitudinally connected through a dowel bar 10 arranged at the position of the hole; dowel bar 10 is a stainless steel screw rod, and the end is fixed through a nut.
The outer side of the bottom surface of the precast concrete guardrail 2 is provided with a limiting part extending downwards, and the inner side surface of the limiting part abuts against the outer end surface of the main beam flange plate 1.
A mortar cushion layer is arranged between the bottom surface of the precast concrete guardrail 2 and the surface of the main beam flange plate 1.
The assembling method of the precast concrete guardrail connecting structure comprises the following steps:
the method comprises the following steps: the method comprises the following steps of prefabricating a concrete guardrail 2 in sections, presetting a vertical guardrail reserved anchoring pore passage 8 at the outer side of the precast concrete guardrail 2, and presetting a pre-buried steel plate 6 at the inner side;
step two: respectively presetting a short reinforcing steel bar 4 reserved on the inner side of the main girder flange plate and a long reinforcing steel bar 3 reserved on the outer side of the main girder flange plate at the end part of the main girder flange plate 1, and vertically extending out of the surface of the main girder flange plate 1;
step three: hoisting a precast concrete guardrail 2 to the end part of a main girder flange plate 1, welding reserved short steel bars 4 on the inner side of the main girder flange plate and embedded steel plates 6 on two sides, inserting reserved long steel bars 3 on the outer side of the main girder flange plate into reserved anchoring pore canals 8 of the guardrail, and pouring slurry to anchor the guardrail;
step four: constructing the next section of the precast concrete guardrail 2, and connecting the sections by adopting a dowel bar 10;
step five: and a longitudinal gap is reserved between the outer end of the bridge deck 9 above the girder flange plate 1 and the inner side surface of the precast concrete guardrail 2, and concrete is poured to form a post-pouring belt 3.
As shown, the structure of the present invention includes at least a section of precast concrete guard rail, a girder flange plate. The prefabricated guardrail is welded with the embedded steel plate at the bottom of the inner side of the guardrail through the vertical main reinforcement reserved on the bridge deck; and adopting a grouting method to anchor the reserved steel bars of the main beam flange plates in the reserved hole channels of the guardrails so as to realize the connection between the prefabricated guardrails and the bridge deck plates; the two ends of the prefabricated section are provided with stiffening sections.
When the guardrail is prefabricated, a steel plate and an anchoring pore channel are embedded at the bottom of a guardrail prefabricated block; when the main beam is prefabricated, steel bars are embedded in corresponding positions of flange plates of the main beam; when the bridge deck is constructed, a reserved post-pouring belt of 20-25 cm is reserved at the position close to the guardrail; the prefabricated sections are connected by dowel bars.
The construction process of the invention comprises the following steps:
1) factory prefabrication of guard bar
When the guardrail is prefabricated, reserving a pore passage through which a main girder anchoring steel bar passes and an anchoring steel plate welded with the main girder anchoring steel bar;
2) stacking, hoisting and transporting prefabricated guardrail component
The prefabricated guardrail components should be made into corresponding stacking schemes according to the rigidity and stress conditions of the prefabricated guardrail components, and necessary supporting measures should be taken into consideration when the prefabricated guardrail components are placed vertically.
3) Hoisting and positioning of prefabricated guardrail
Hoisting the prefabricated guardrail by adopting hoisting tools such as a truck crane or a bridge girder erection machine and the like according to the weight of the hoisted guardrail; the guardrail is stably and slowly hoisted, and collision and the like are strictly prohibited; after the guardrail sections are hoisted in place, the guardrail is positioned and fixed through temporary stabilizing measures and connecting measures among the sections so as to ensure the stability of the guardrail.
4) On-site assembling of prefabricated guardrail and main beam
Roughening the spliced surfaces of the bottom of the prefabricated guardrail and the flange plate of the main beam, and paving a TGM60 mortar cushion layer with the thickness of 20mm after the spliced surfaces are soaked in clean water; derusting the pre-buried steel plate of the guardrail and the reserved steel bars of the flange plate of the main beam; hoisting the prefabricated guardrail in place, carrying out double-sided welding on reserved steel bars on the inner side of a main beam and a guardrail embedded steel plate, enabling the reserved steel bars on the outer side of the main beam to penetrate through reserved metal corrugated pipe pore passages, and pouring high-strength shrinkage-free cement grouting material to be anchored in the guardrail; welding the bridge deck reinforcing mesh and the outer side surfaces of the guardrail embedded steel plates, and then pouring self-compacting micro-expansion concrete to complete splicing construction of the prefabricated guardrails and the main beams; and constructing the next section of prefabricated guardrail according to the flow, wherein the guardrail sections are connected by adopting M27 stainless steel screws.
The invention is not limited to the examples, and any equivalent changes to the technical solution of the invention by a person skilled in the art after reading the description of the invention are covered by the claims of the invention.
Claims (9)
1. Precast concrete guardrail joint construction, its characterized in that:
the connecting structure comprises a main beam flange plate (1) and a prefabricated concrete guardrail (2) which is vertical on the transverse outer side of the main beam flange plate;
the end part of the main beam flange plate (1) is respectively provided with a main beam flange plate inner side reserved short steel bar (4) and a main beam flange plate outer side reserved long steel bar (3), and the main beam flange plate inner side reserved short steel bar and the main beam flange plate outer side reserved long steel bar vertically extend out of the surface of the main beam flange plate (1);
the inner side surface of the precast concrete guardrail (2) is provided with an embedded steel plate (6) which is welded and fixed with a reserved short steel bar (4) at the inner side of the main beam flange plate; the outer side of the precast concrete guardrail (2) is provided with a vertical guardrail reserved anchoring hole (8), and long steel bars (3) are reserved on the outer side of the main beam flange plate and inserted into the guardrail reserved anchoring hole (8) to be fixed through grouting.
2. The precast concrete guard rail connection construction of claim 1, wherein:
be provided with steel sheet anchor reinforcing bar (7) in precast concrete guardrail (2), pre-buried steel sheet (6) weld in steel sheet anchor reinforcing bar (7) and by the anchor inside precast concrete guardrail (2).
3. The precast concrete guard rail connection construction of claim 2, wherein:
the bridge deck (9) is arranged above the girder flange plate (1), a longitudinal gap is reserved between the outer end of the bridge deck (9) and the inner side surface of the precast concrete guardrail (2), and concrete is poured to form a post-pouring belt (3).
4. The precast concrete guard rail connection construction of claim 3, wherein:
the precast concrete guardrail (2) is longitudinally precast in sections, and each section comprises stiffening parts at two longitudinal ends and a standard part in the middle; the standard part is provided with a longitudinal flower groove; the stiffening part is provided with a lightening hole.
5. The precast concrete guard rail connection construction of claim 4, wherein:
the stiffening part of each section of the precast concrete guardrail (2) is provided with a longitudinal hole, and the adjacent sections are longitudinally connected through a dowel bar (10) arranged at the position of the hole;
the dowel bar (10) is a stainless steel screw rod, and the end part of the dowel bar is fixed through a nut.
6. The precast concrete guard rail connection construction of claim 5, wherein:
the outer side of the bottom surface of the precast concrete guardrail (2) is provided with a limiting part extending downwards, and the inner side surface of the limiting part abuts against the outer end surface of the main beam flange plate (1).
7. The precast concrete guard rail connection structure of claim 6, wherein:
a mortar cushion layer is arranged between the bottom surface of the precast concrete guardrail (2) and the surface of the main beam flange plate (1).
8. The precast concrete guardrail connecting construction of claim 7, wherein:
the inner wall of the reserved anchoring pore canal (8) of the guardrail is provided with a corrugated pipe.
9. The assembling method of the precast concrete guardrail connecting structure is characterized by comprising the following steps of:
the method comprises the following steps:
the method comprises the following steps: the concrete guardrail comprises a segmental precast concrete guardrail (2), wherein a vertical guardrail reserved anchoring pore passage (8) is preset on the outer side of the precast concrete guardrail (2), and an embedded steel plate (6) is preset on the inner side;
step two: short steel bars (4) and long steel bars (3) are reserved on the inner side and the outer side of the main girder flange plates respectively at the end parts of the main girder flange plates (1) and vertically extend out of the surfaces of the main girder flange plates (1);
step three: hoisting a precast concrete guardrail (2) to the end part of a main beam flange plate (1), welding short steel bars (4) reserved on the inner side of the main beam flange plate with the two sides of an embedded steel plate (6), inserting long steel bars (3) reserved on the outer side of the main beam flange plate into reserved anchoring pore passages (8) of the guardrail, and pouring slurry to anchor the guardrail;
step four: constructing the next section of precast concrete guardrail (2), and connecting the sections by adopting dowel bars (10);
step five: and a longitudinal gap is reserved between the outer end of the bridge deck (9) above the girder flange plate (1) and the inner side surface of the precast concrete guardrail (2), and concrete is poured to form a post-pouring belt (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911321889.2A CN110872813A (en) | 2019-12-20 | 2019-12-20 | Precast concrete guardrail connecting structure and assembling method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911321889.2A CN110872813A (en) | 2019-12-20 | 2019-12-20 | Precast concrete guardrail connecting structure and assembling method |
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| Publication Number | Publication Date |
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| CN110872813A true CN110872813A (en) | 2020-03-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911321889.2A Pending CN110872813A (en) | 2019-12-20 | 2019-12-20 | Precast concrete guardrail connecting structure and assembling method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113737651A (en) * | 2021-07-30 | 2021-12-03 | 中铁十九局集团第五工程有限公司 | Assembled anti-collision guardrail and mounting method thereof |
| CN114427193A (en) * | 2022-03-11 | 2022-05-03 | 湖南大学 | Anchored UHPC curved surface anti-collision guardrail for splash zone bridge and construction method thereof |
-
2019
- 2019-12-20 CN CN201911321889.2A patent/CN110872813A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113737651A (en) * | 2021-07-30 | 2021-12-03 | 中铁十九局集团第五工程有限公司 | Assembled anti-collision guardrail and mounting method thereof |
| CN114427193A (en) * | 2022-03-11 | 2022-05-03 | 湖南大学 | Anchored UHPC curved surface anti-collision guardrail for splash zone bridge and construction method thereof |
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