CN212200051U - Assembled reinforced concrete side anti-collision guardrail for connecting bridge - Google Patents
Assembled reinforced concrete side anti-collision guardrail for connecting bridge Download PDFInfo
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- CN212200051U CN212200051U CN202020141510.1U CN202020141510U CN212200051U CN 212200051 U CN212200051 U CN 212200051U CN 202020141510 U CN202020141510 U CN 202020141510U CN 212200051 U CN212200051 U CN 212200051U
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Abstract
The utility model discloses an assembled reinforced concrete side anti-collision guardrail for connecting bridges, which comprises guardrails, angle steel, a stop block fixed on the bridge deck of the bridge and an embedded part embedded in the bridge, wherein the lower end of each guardrail is provided with an embedded groove which is connected with the stop block in a clamping way; connecting reinforcing steel bars are arranged on the bottom surface between the embedded groove and the collision-facing surface of the guardrail and at the lower end of the collision-facing surface of the guardrail, and the connecting reinforcing steel bars are welded with two inner side surfaces of the angle steel; the embedded part comprises a steel plate and bent embedded steel bars, the embedded steel bars are fixed in the bridge, the steel plate is fixed at the upper ends of the embedded steel bars, and the lower outer side faces of the angle steels are welded on the steel plate. The utility model provides high joint strength between guardrail and the bridge, whole difficult toppling, the efficiency of construction is high simultaneously, still reduces the use of steel, plays resources are saved's purpose.
Description
Technical Field
The utility model relates to an anticollision barrier technique, concretely relates to assembled reinforced concrete side anticollision barrier of connecting bridge.
Background
Set up anti-collision guardrail be the most effectual safeguard measure of driving safety on guaranteeing the bridge, meanwhile, anti-collision guardrail is the important component part of bridge, traditional reinforced concrete guardrail often adopts on-the-spot reinforcement, the cast-in-place construction of concrete, a large amount of reinforcing bar transportation, the processing operation is wasted time and energy, construction period and cost have been increased, and construction quality is difficult to control, easily cause guardrail steel bar protective layer thickness to satisfy standard requirement, thereby lead to concrete surface fracture, the decoration risk of inside reinforcing bar increases, seriously influenced the durability of guardrail, and the cast-in-place causes the pollution great, be not conform to the requirement of the development of national green building.
Adopt prefabricated assembled anticollision barrier can be fine solve cast-in-place anticollision barrier for the drawback that bridge construction brought. The core problem with fabricated structures is represented by poor integrity. When the assembly type anti-collision guardrail is installed, the guardrail and the bridge floor are required to be connected in a proper connection mode, the connection strength is ensured, meanwhile, enough anti-overturning capacity is required to be provided, namely, the connection part is required to provide enough strength and rigidity when a vehicle collides with the guardrail, and the assembly type anti-collision guardrail can be conveniently and quickly installed by workers during construction.
The vertical connection form of current assembled anticollision barrier mainly has following several:
1. embedded connection (detachable concrete bridge guardrail foundation and longitudinal connection form research, sugayu, guangdong road traffic, 2013). The embedded connection is divided into external embedded connection and embedded connection, the external embedded connection utilizes a stop block and a paving layer to form an embedded groove, and the prefabricated guardrail is placed in the embedded groove; the embedded connection is realized by clamping the guardrail precast block on the I-steel fixed on the cast-in-place layer to form the whole guardrail.
2. Bolt connection (dynamic finite element analysis of novel fabricated concrete anti-collision wall), Zhang Hai, northern traffic, 2019). The guardrail precast block is fixed on the bridge flange plate through the foundation bolts embedded in the bridge flange plate.
3. Grouting sleeves and grout anchor connections (analysis of design of quick connection of prefabricated crash barriers, Liaojun, Anhui architecture: research and application of traffic engineering, 2018). And reserving the stretching steel bars when the bridge deck concrete is poured, hoisting the prefabricated anti-collision guardrail after the concrete pouring completion strength reaches, reserving the stretching steel bars, anchoring the stretching steel bars into the sleeve and the prestressed corrugated pipe, and then grouting the steel bars compactly.
4. And (2018) reserved steel bar anchoring connection (analysis on design of rapid connection of prefabricated anti-collision guardrails, Lianjun, Anhui construction: research and application of traffic engineering). Reserve the anchor reinforcing bar, set up the shaped steel supporting leg simultaneously, will prefabricate anticollision barrier hoist and mount before carrying bridge floor concrete and target in place, the shaped steel supporting leg supports on template or reliable support, supports simultaneously temporarily fixedly.
5. Bridge deck embedded steel plate connection (design analysis for rapid connection of prefabricated crash barriers, Liaoma, Anhui architecture: research and application of traffic engineering) 2018). The method adopts the technology of pre-embedded steel plate angle steel welding and slurry anchor connection, metal corrugated pipes and embedded parts are pre-embedded in the bridge floor and the reserved steel bars and the prefabricated anti-collision guardrail, and the vehicle-facing surface is connected through L-shaped steel plate welding.
Among the methods, the method 1 (embedded connection) is easy to overturn integrally in practical application, and the strength of the connection form has a great relationship with the size of the gap of the embedded groove, but the size of the gap is difficult to control in construction, and the safety performance of the guardrail is probably influenced greatly due to larger construction errors; in the method 2 (bolt connection), bolt hole positions need to be accurately aligned to foundation bolts when the guardrail is hoisted, the installation difficulty is high, and stress concentration occurs at the bolt connection positions, so that concrete is damaged; the method 3 (grouting sleeve and anchor slurry connection) has very high requirements on the sleeve installation accuracy, resulting in low installation efficiency; the method 4 (reserved steel bar anchoring connection) requires a large cast-in-place space for the bridge deck slab, has great influence on a construction side, and causes the increase of formwork supporting cost; the method 5 (bridge deck embedded steel plate connection) has the disadvantages of complicated embedded parts, certain requirements on the sleeve installation precision and high production cost.
SUMMERY OF THE UTILITY MODEL
The utility model aims at overcoming the not enough of above prior art existence, provide a fabricated reinforced concrete side anticollision barrier of connecting bridge. This assembled reinforced concrete side anticollision barrier of connecting bridge's joint strength is high, and overall stability is strong, and the butt joint precision requirement is not high, and the installation effectiveness is high.
The purpose of the utility model is realized through the following technical scheme: the assembled reinforced concrete side anti-collision guardrail connected with the bridge comprises guardrails, angle steel, a stop block fixed on the bridge deck of the bridge and an embedded part embedded in the bridge, wherein the two side faces of each guardrail are a head-on collision face and a back-on collision face respectively, the lower end of each guardrail is provided with an embedding groove, and the embedding grooves are clamped with the stop blocks; connecting reinforcing steel bars are arranged on the bottom surface between the embedded groove and the collision-facing surface of the guardrail and at the lower end of the collision-facing surface of the guardrail, and the connecting reinforcing steel bars are welded with two inner side surfaces of the angle steel; the embedded part comprises a steel plate and bent embedded steel bars, the embedded steel bars are fixed in the bridge, the steel plate is fixed at the upper ends of the embedded steel bars, and the lower outer side faces of the angle steels are welded on the steel plate.
Preferably, the embedded steel bars are provided with a plurality of pairs, and the plurality of pairs of embedded steel bars are uniformly distributed along the length direction of the steel plate.
Preferably, two embedded steel bars in each pair of embedded steel bars are symmetrically arranged.
Preferably, the distance between two adjacent pairs of embedded steel bars is 100-200 mm.
Preferably, the angle steel is provided with a groove.
Preferably, the embedded steel bars are L-shaped.
Preferably, the embedding and fixing groove is a stepped groove.
Preferably, the groove surface of the embedded groove and the bottom surface of the guardrail are both provided with cement mortar cushion layers.
Preferably, a water stop strip is arranged in the cement mortar cushion layer.
A construction method of an assembly type reinforced concrete side anti-collision guardrail based on the connecting bridge comprises the following steps:
s1), prefabricating a guardrail, wherein the lower end of the guardrail is provided with an embedded groove which is clamped with a stop block; connecting reinforcing steel bars are arranged on the bottom surface between the embedded groove and the collision-facing surface of the guardrail and the lower end of the collision-facing surface of the guardrail, the connecting reinforcing steel bars are welded with two inner side surfaces of angle steel, and the angle steel is provided with a groove;
s2) embedding embedded parts on the bridge, wherein the embedded parts comprise steel plates and bent embedded steel bars, the embedded steel bars are completely embedded in the bridge, and the steel plates are fixed at the upper ends of the embedded steel bars;
s3) cement mortar is smeared between the groove surface of the embedded groove and the stop block and between the bottom surface of the guardrail and the bridge floor of the bridge to form a cement mortar cushion layer, and then the prefabricated guardrail is hoisted and positioned;
s4) angle steel and a steel plate are welded together by groove welding.
The utility model discloses for prior art have following advantage:
1. the utility model discloses a guardrail sets up caulking groove and connecting reinforcement, and the guardrail is through the dog joint on caulking groove and the bridge, and the guardrail still welds through connecting reinforcement and angle steel and the built-in fitting of burying underground in the bridge simultaneously, and on the guardrail relied on joint and welded combined action to be fixed in the bridge promptly, this has improved the stability of being connected between guardrail and the bridge, has reduced the whole risk that topples of whole anticollision barrier.
2. The utility model provides a guardrail relies on joint and welded mode to be fixed in on the bridge, then install in the construction, and the rag bolt is aimed at to the inaccuracy, has reduced the installation degree of difficulty, and avoids stress concentration to prevent that the damage protects crashproof guardrail and bridge.
3. The utility model provides a guardrail relies on joint and welded mode to be fixed in on the bridge, then does not need to require higher installation accuracy like the sleeve, has improved the efficiency of construction.
4. The utility model provides an embedded part mainly comprises steel sheet and crooked embedded bar, and this simple structure uses steel few, and is easy to assemble promptly, and the cost is still reduced has reached green construction, resources are saved's effect.
5. The utility model provides an angle steel sets up the groove, adopts the groove welding between angle steel and the steel sheet, has further improved intensity.
Drawings
Fig. 1 is a front view of the assembled reinforced concrete side crash barrier for connecting bridges of the present invention.
Fig. 2 is a side view of the assembled reinforced concrete side crash barrier of the connecting bridge of the present invention.
Fig. 3 is a side view of the guard rail of the present invention.
Figure 4 is a cross-sectional view of the guardrail of the present invention.
Fig. 5 is a schematic view of the joint between the angle steel and the guardrail of the present invention.
Fig. 6 is a schematic view between the caulking groove and the stopper of the present invention.
Fig. 7 is an enlarged schematic view of the joint of the angle steel and the embedded part of the present invention.
Fig. 8 is a time course graph of the maximum main tensile stress of the reinforced concrete.
Fig. 9 is a cloud of the maximum principal tensile stress of the reinforced concrete at the moment of impact.
Fig. 10 is a graph of the overall lateral displacement time course of the crash barrier.
Fig. 11 is a time course curve of the maximum main tensile stress of the guardrail connecting piece formed by connecting reinforcing steel bars, angle steel, embedded parts and the like.
The steel fence comprises a guardrail body 1, angle steel 2, a stop block 3, an embedded part 4, an embedding groove 5, a connecting steel bar 6, a steel plate 7, an embedded steel bar 8, a groove 9, a cement mortar cushion layer 10, a stop water bar 11, a head-on collision surface 12, a back collision surface 13 and a bridge 14.
Detailed Description
The present invention will be further explained with reference to the drawings and examples.
The assembled reinforced concrete side anti-collision guardrail connected with the bridge shown in the figures 1 to 5 comprises guardrails, angle steel, stop blocks fixed on the bridge deck of the bridge and embedded parts embedded in the bridge, wherein two side faces of each guardrail are a head-on collision face and a back-on collision face respectively, the lower ends of the guardrails are provided with embedded grooves, and the embedded grooves are clamped with the stop blocks; connecting reinforcing steel bars are arranged on the bottom surface between the embedded groove and the collision-facing surface of the guardrail and at the lower end of the collision-facing surface of the guardrail, and the connecting reinforcing steel bars are welded with two inner side surfaces of the angle steel; the embedded part comprises a steel plate and bent embedded steel bars, the embedded steel bars are fixed in the bridge, the steel plate is fixed at the upper ends of the embedded steel bars, and the lower outer side faces of the angle steels are welded on the steel plate. The total length of the single embedded steel bar in the specific embodiment is 30cm, and the proper length is selected to further ensure the connection strength between the guardrail and the bridge. Particularly, the joint mode and the welding mode coaction between the guardrail and the bridge improve the connection strength, and simultaneously, the installation difficulty is reduced, and the construction efficiency is improved.
As shown in fig. 8 to fig. 11, at the in-process of simulation vehicle striking guardrail, it is right through the finite element the utility model discloses anticollision barrier overall structure carries out the dynamic behavior analysis under the impact load effect, and guardrail overall structure is stable under different operating mode effects, and mechanical properties is superior, can not take place whole phenomenon of toppling, guardrail connecting piece dependable performance, reinforcing steel plate stress value is in safety range. And the vehicle guiding performance is good.
The embedded steel bars are provided with a plurality of pairs, and the plurality of pairs of embedded steel bars are uniformly distributed along the length direction of the steel plate. Two embedded steel bars in each pair of embedded steel bars are symmetrically arranged. This simple structure, evenly distributed is in order to avoid stress concentration, and the symmetry sets up simultaneously and has further improved joint strength.
The distance between two adjacent pairs of embedded steel bars is 100-200 mm. In this implementation, the distance between adjacent two pairs of embedded steel bars is 150mm, and suitable distance both can guarantee to connect but intensity, still can save the use of steel to reduce the cost.
The angle steel is provided with a groove. The arrangement of the groove can increase the welding area so as to further improve the connection strength. As shown in fig. 7, the angle steel is provided with a groove, and the welding between the angle steel and the welded plate forms a groove weld, which further improves the connection strength.
The embedded steel bars are L-shaped. This simple structure further improves the joint strength between guardrail and the bridge.
The embedded groove is a stepped groove. As shown in figure 3, the embedding slots are open towards the direction of the back collision surface and towards the direction of the bottom surface of the guardrail, so that the stop blocks are conveniently clamped into the embedding slots, and further construction is facilitated.
As shown in fig. 2 and 6, the groove surface of the caulking groove and the bottom surface of the guardrail are both provided with cement mortar cushion layers. The cement mortar cushion layer facilitates the positioning of the guardrail installation, and further improves the connection strength between the guardrail and the bridge.
As shown in fig. 6, a water stop strip is arranged in the cement mortar cushion layer. The water-swelling water stop rod can absorb water volume when meeting water, and the caulking groove gap between the guardrail precast block and the main beam is compacted to form a waterproof plastic colloid, so that the influence of water on the whole structure is reduced, and the durability of the whole anti-collision guardrail structure is improved.
A construction method of an assembly type reinforced concrete side anti-collision guardrail based on the connecting bridge comprises the following steps:
s1), prefabricating a guardrail, wherein the lower end of the guardrail is provided with an embedded groove which is clamped with a stop block; connecting reinforcing steel bars are arranged on the bottom surface between the embedded groove and the collision-facing surface of the guardrail and the lower end of the collision-facing surface of the guardrail, the connecting reinforcing steel bars are welded with two inner side surfaces of angle steel, and the angle steel is provided with a groove;
s2) embedding embedded parts on the bridge, wherein the embedded parts comprise steel plates and bent embedded steel bars, the embedded steel bars are completely embedded in the bridge, and the steel plates are fixed at the upper ends of the embedded steel bars;
s3) cement mortar is smeared between the groove surface of the embedded groove and the stop block and between the bottom surface of the guardrail and the bridge floor of the bridge to form a cement mortar cushion layer, and then the prefabricated guardrail is hoisted and positioned;
s4) angle steel and a steel plate are welded together by groove welding.
The above-mentioned specific implementation is the preferred embodiment of the present invention, can not be right the utility model discloses the limit, any other does not deviate from the technical scheme of the utility model and the change or other equivalent replacement modes of doing all contain within the scope of protection of the utility model.
Claims (9)
1. Connect assembled reinforced concrete side anticollision barrier of bridge, its characterized in that: the steel bar guardrail comprises guardrails, angle steel, a stop block fixed on a bridge and an embedded part embedded in the bridge, wherein two side surfaces of each guardrail are a head-on collision surface and a back-on collision surface respectively, and an embedding groove is arranged at the lower end of each guardrail and is clamped with the stop block; connecting reinforcing steel bars are arranged on the bottom surface between the embedded groove and the collision-facing surface of the guardrail and at the lower end of the collision-facing surface of the guardrail, and the connecting reinforcing steel bars are welded with two inner side surfaces of the angle steel; the embedded part comprises a steel plate and bent embedded steel bars, the embedded steel bars are fixed in the bridge, the steel plate is fixed at the upper ends of the embedded steel bars, and the lower outer side faces of the angle steels are welded on the steel plate.
2. The assembly-type reinforced concrete side anti-collision guardrail for connecting a bridge, according to claim 1, is characterized in that: the embedded steel bars are provided with a plurality of pairs, and the plurality of pairs of embedded steel bars are uniformly distributed along the length direction of the steel plate.
3. The assembly-type reinforced concrete side anti-collision guardrail for connecting a bridge, according to claim 2, is characterized in that: two embedded steel bars in each pair of embedded steel bars are symmetrically arranged.
4. The assembly-type reinforced concrete side anti-collision guardrail for connecting a bridge, according to claim 2, is characterized in that: the distance between two adjacent pairs of embedded steel bars is 100-200 mm.
5. The assembly-type reinforced concrete side anti-collision guardrail for connecting a bridge, according to claim 1, is characterized in that: the angle steel is provided with a groove.
6. The assembly-type reinforced concrete side anti-collision guardrail for connecting a bridge, according to claim 1, is characterized in that: the embedded steel bars are L-shaped.
7. The assembly-type reinforced concrete side anti-collision guardrail for connecting a bridge, according to claim 1, is characterized in that: the embedded groove is a stepped groove.
8. The assembly-type reinforced concrete side anti-collision guardrail for connecting a bridge, according to claim 1, is characterized in that: and cement mortar cushion layers are arranged on the groove surface of the embedded groove and the bottom surface of the guardrail.
9. The assembly-type reinforced concrete side anti-collision guardrail for connecting a bridge, according to claim 8, is characterized in that: and a water stop strip is arranged in the cement mortar cushion layer.
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| CN202020141510.1U CN212200051U (en) | 2020-01-22 | 2020-01-22 | Assembled reinforced concrete side anti-collision guardrail for connecting bridge |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111364355A (en) * | 2020-01-22 | 2020-07-03 | 华南理工大学 | Assembled reinforced concrete side anti-collision guardrail for connecting bridges and construction method |
| CN113293700A (en) * | 2021-05-08 | 2021-08-24 | 南京交通职业技术学院 | Urban bridge L-shaped marble railing and design and construction method |
| CN113957797A (en) * | 2021-10-22 | 2022-01-21 | 通州建总集团有限公司 | Assembled elevated road edge concrete rail guard construction steel mould |
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2020
- 2020-01-22 CN CN202020141510.1U patent/CN212200051U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111364355A (en) * | 2020-01-22 | 2020-07-03 | 华南理工大学 | Assembled reinforced concrete side anti-collision guardrail for connecting bridges and construction method |
| CN113293700A (en) * | 2021-05-08 | 2021-08-24 | 南京交通职业技术学院 | Urban bridge L-shaped marble railing and design and construction method |
| CN113293700B (en) * | 2021-05-08 | 2023-07-04 | 南京交通职业技术学院 | Urban bridge L-shaped marble railing and design construction method |
| CN113957797A (en) * | 2021-10-22 | 2022-01-21 | 通州建总集团有限公司 | Assembled elevated road edge concrete rail guard construction steel mould |
| CN113957797B (en) * | 2021-10-22 | 2023-09-26 | 通州建总集团有限公司 | Assembled overhead road edge concrete rail guard construction steel mould |
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