CN111364356A - 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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- CN111364356A CN111364356A CN202010073195.8A CN202010073195A CN111364356A CN 111364356 A CN111364356 A CN 111364356A CN 202010073195 A CN202010073195 A CN 202010073195A CN 111364356 A CN111364356 A CN 111364356A
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- 239000011150 reinforced concrete Substances 0.000 title claims abstract description 30
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 49
- 239000010959 steel Substances 0.000 claims abstract description 49
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 32
- 238000003466 welding Methods 0.000 claims abstract description 29
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims abstract description 9
- 230000004888 barrier function Effects 0.000 claims description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 239000011083 cement mortar Substances 0.000 claims description 7
- 238000009434 installation Methods 0.000 abstract description 8
- 210000001503 joint Anatomy 0.000 abstract description 2
- 238000010276 construction Methods 0.000 description 12
- 239000004567 concrete Substances 0.000 description 8
- 238000000034 method Methods 0.000 description 8
- 239000010410 layer Substances 0.000 description 7
- 238000004458 analytical method Methods 0.000 description 5
- 230000009471 action Effects 0.000 description 4
- 238000011160 research Methods 0.000 description 4
- 229910000746 Structural steel Inorganic materials 0.000 description 3
- 238000004873 anchoring Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000002787 reinforcement Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 239000000084 colloidal system Substances 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009415 formwork Methods 0.000 description 1
- 239000011440 grout Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- 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
-
- 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
Abstract
The invention discloses an assembled reinforced concrete side anti-collision guardrail for connecting a bridge, which comprises angle steel, a stop block fixed on the bridge floor of the bridge and an embedded part embedded in the bridge, wherein the two side surfaces of the guardrail are a head-on collision surface and a back-on collision surface respectively; 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 welding plate, a connecting plate and a reinforcing plate, the upper end and the lower end of the connecting plate are respectively connected with the welding plate and the reinforcing plate, and the welding plate is welded with the lower outer side face of the angle steel. The invention has the advantages of high connection strength, strong stability, low requirement on butt joint precision and high installation efficiency.
Description
Technical Field
The invention relates to an anti-collision guardrail technology, in particular to an assembled reinforced concrete side anti-collision guardrail for connecting a 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.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides a fabricated reinforced concrete side anti-collision guardrail for connecting a bridge. This connection bridge assembled reinforced concrete side anticollision barrier'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 invention is realized by the following technical scheme: the assembled reinforced concrete side anti-collision guardrail for the connecting bridge comprises guardrails, angle steel, a stop block fixed on the bridge floor of the bridge and an embedded part embedded in the bridge, wherein the two side surfaces of each guardrail are a head-on collision surface and a back-on collision surface respectively; 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 welding plate, a connecting plate and a reinforcing plate, the upper end and the lower end of the connecting plate are respectively connected with the welding plate and the reinforcing plate, and the welding plate is welded with the lower outer side face of the angle steel.
Preferably, the width f of the welding plate is less than or equal to the width e of the reinforcing plate.
Preferably, the assembled reinforced concrete side anti-collision guardrail for connecting bridges further comprises a rib plate, a first right-angle edge of the rib plate is connected with the side face of the connecting plate, and a second right-angle edge of the rib plate is connected with the reinforcing plate.
Preferably, the angle steel is provided with a groove.
Preferably, the upper end of the connecting plate is welded with the middle part of the lower surface of the welding plate, and the lower end of the connecting plate is welded with the middle part of the upper surface of the reinforcing plate.
Preferably, the thickness a of the welding plate is 10mm to 15mm, the thickness b of the reinforcing plate is 10mm to 15mm, and the thickness c of the connecting plate is 8mm to 12 mm.
Preferably, the height d of the connecting plate is 80 mm-150 mm, and the width e of the reinforcing plate is 100 mm-200 mm.
Preferably, the embedding and fixing groove is a stepped groove.
Preferably, cement mortar cushion layers are arranged 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.
Preferably, a water stop strip is arranged in the cement mortar cushion layer.
Compared with the prior art, the invention has the following advantages:
1. this guardrail in connecting bridge assembled reinforced concrete side anticollision barrier is equipped with caulking groove and connecting reinforcement, wherein the caulking groove with fix the dog joint at the bridge, and connecting reinforcement earlier with the angle steel welding back, rethread angle steel welds with the built-in fitting of burying underground in the bridge, the guardrail relies on joint and welded combined action to be fixed in on the bridge promptly, this stability of being connected between guardrail and the bridge has been improved, the whole risk of toppling of whole anticollision barrier has been reduced, can effectively bear horizontal impact force under joint and welded combined action.
2. This guardrail in the guardrail among the bridge assembled reinforced concrete side anticollision guardrail relies on joint and welded mode to be fixed in the bridge on, then install in the construction, 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 anticollision guardrail and bridge.
3. The guardrail in the guardrail among this connection bridge assembled reinforced concrete side anticollision guardrail relies on joint and welded mode to be fixed in the bridge on, then need not require higher installation accuracy like the sleeve, improved the efficiency of construction.
4. This built-in fitting in connecting bridge assembled reinforced concrete side anticollision barrier mainly then welds board, connecting plate and gusset plate and constitutes, and this structure is very simple, and the wholeness is strong, and it is convenient fast to construct, need not adopt complicated built-in fitting simultaneously, the cost is reduced.
5. The embedded part in the assembled reinforced concrete side anti-collision guardrail for the connecting bridge mainly comprises the welded plate, the connecting plate and the reinforcing plate, so that an I-beam structure is formed, the integrity is good, the maximum stress cannot easily reach the yield strength of the material under the impact load of a vehicle, and the mechanical property is excellent.
6. The angle steel in the assembled reinforced concrete side anti-collision guardrail for the connecting bridge is provided with the groove, and the angle steel and the steel plate are welded by groove welding, so that the strength is further improved.
Drawings
Fig. 1 is a front view of the assembled reinforced concrete side crash barrier for a connecting bridge according to embodiment 1.
Fig. 2 is a side view of the assembled reinforced concrete side crash barrier for a connecting bridge according to embodiment 1.
Fig. 3 is a side view of the guardrail according to example 1 when connected to angle iron.
Fig. 4 is a sectional view of the guardrail according to embodiment 1 when connected to angle iron.
Fig. 5 is an enlarged schematic view of the guardrail according to embodiment 1 when connected to angle iron.
FIG. 6 is an enlarged view of the engagement between the caulking groove and the stopper in embodiment 1.
Fig. 7 is a schematic structural view of an embedment member of embodiment 1.
Fig. 8 is an enlarged schematic view of a welded portion between angle steel and embedded parts in embodiment 1.
Fig. 9 is a schematic structural view of an embedment member of embodiment 2.
Fig. 10 is a time curve diagram of the maximum main tensile stress of the guardrail connecting piece formed by connecting reinforcing steel bars, angle steel, embedded parts and the like.
FIG. 11 is a cloud chart of main tensile stress of crash barrier at impact instant
The steel plate comprises a guardrail 1, angle steel 2, a stop block 3, an embedded part 4, a head-on collision surface 5, a back-on collision surface 6, an embedding groove 7, a connecting steel bar 8, a welding plate 9, a connecting plate 10, a reinforcing plate 11, a groove 12, a cement mortar cushion layer 13, a water stopping groove 14, a bridge 15, a rib plate 16 and a groove weld 17.
Detailed Description
The invention is further illustrated by the following figures and examples.
Example 1
The fabricated reinforced concrete side anti-collision guardrail for connecting bridges as shown in fig. 1 to 4 and 7 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 welding plate, a connecting plate and a reinforcing plate, the upper end and the lower end of the connecting plate are respectively connected with the welding plate and the reinforcing plate, and the welding plate is welded with the lower outer side face of the angle steel. Specifically, the thickness a of the welding plate is 10-15 mm, the thickness b of the reinforcing plate is 10-15 mm, and the thickness c of the connecting plate is 8-12 mm. In this embodiment, the thickness a of the welded plate is 12mm, the thickness b of the reinforcing plate is 12mm, and the thickness c of the connecting plate is 10. The appropriate thickness is selected to ensure the strength of the embedded part, so that the connection strength is ensured, the occurrence of overturning is reduced, and the mechanical property of the anti-collision guardrail is improved. Wherein, as shown in fig. 5, both inner side surfaces of the angle steel are welded with the connecting steel bars, which further improves the connecting strength.
As shown in fig. 10 and 11, in the process of simulating the collision of a vehicle with a guardrail, the dynamic performance analysis under the impact load action is performed on the overall structure of the anti-collision guardrail through a finite element, the overall structure of the guardrail is stable under different working conditions, the integral overturning phenomenon cannot occur, and the guardrail connecting piece formed by connecting the steel bars, the angle steel and the embedded parts is reliable in performance, namely the maximum main tensile stress value of the angle steel and the embedded parts of the i-beam type is smaller than the yield strength of the material under the impact load action.
The width f of the welding plate is smaller than or equal to the width e of the reinforcing plate. In this embodiment, the width f of the welding plate is smaller than the width e of the reinforcing plate. The I-shaped structure not only ensures the strength, but also reduces the use of materials and saves the cost.
As shown in fig. 3 and 5, 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. 8, 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 upper end of the connecting plate is welded with the middle part of the lower surface of the welding plate, and the lower end of the connecting plate is welded with the middle part of the upper surface of the reinforcing plate. The embedded part is stressed uniformly, stress concentration is reduced, and the stability of the embedded part is high.
The height d of the connecting plate is 80-150 mm, and the width e of the reinforcing plate is 100-200 mm. In this embodiment, the height d of the connecting plate is 100mm, and the width e of the reinforcing plate is 150 mm. The proper size is used for ensuring the connection strength and ensuring the embedded part to have sufficient stability and firmness.
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, cement mortar cushion layers are respectively arranged between the groove surface of the embedded groove and the stop block and between the bottom surface of the guardrail and the bridge deck of the bridge. The mud mortar bed course makes things convenient for the location that the guardrail installed in promptly, has still further improved the joint strength between guardrail and the bridge.
And 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 guardrail structure is improved.
Example 2
This connection bridge assembled reinforced concrete side anticollision barrier increases following technical characteristic on embodiment 1's basis: as shown in fig. 9, the fabricated reinforced concrete side anti-collision guardrail for connecting bridges further comprises a rib plate, wherein a first right-angle edge of the rib plate is connected with the side surface of the connecting plate, and a second right-angle edge of the rib plate is connected with the reinforcing plate. The rib plates are additionally arranged, so that the strength of the embedded part can be further improved, the stability is further improved, and the risk of overturning is reduced.
The above-mentioned embodiments are preferred embodiments of the present invention, and the present invention is not limited thereto, and any other modifications or equivalent substitutions that do not depart from the technical spirit of the present invention are included in the scope of the present invention.
Claims (10)
1. Connect bridge assembled reinforced concrete side anticollision barrier, its characterized in that: the steel plate guardrail comprises guardrails, angle steel, a stop block fixed on the bridge deck of a bridge and an embedded part embedded in the bridge, wherein the two side surfaces of each guardrail are a head-on collision surface and a back-on collision surface 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 welding plate, a connecting plate and a reinforcing plate, the upper end and the lower end of the connecting plate are respectively connected with the welding plate and the reinforcing plate, and the welding plate is welded with the lower outer side face of the angle steel.
2. The assembled reinforced concrete side crash barrier for connecting bridges as claimed in claim 1, wherein: the width f of the welding plate is smaller than or equal to the width e of the reinforcing plate.
3. The assembled reinforced concrete side crash barrier for connecting bridges as claimed in claim 1, wherein: the reinforcing plate is characterized by further comprising a rib plate, wherein a first right-angle edge of the rib plate is connected with the side face of the connecting plate, and a second right-angle edge of the rib plate is connected with the reinforcing plate.
4. The assembled reinforced concrete side crash barrier for connecting bridges as claimed in claim 1, wherein: the angle steel is provided with a groove.
5. The assembled reinforced concrete side crash barrier for connecting bridges as claimed in claim 1, wherein: the upper end of the connecting plate is welded with the middle part of the lower surface of the welding plate, and the lower end of the connecting plate is welded with the middle part of the upper surface of the reinforcing plate.
6. The assembled reinforced concrete side crash barrier for connecting bridges as claimed in claim 1, wherein: the thickness a of the welding plate is 10-15 mm, the thickness b of the reinforcing plate is 10-15 mm, and the thickness c of the connecting plate is 8-12 mm.
7. The assembled reinforced concrete side crash barrier for connecting bridges as claimed in claim 1, wherein: the height d of the connecting plate is 80-150 mm, and the width e of the reinforcing plate is 100-200 mm.
8. The assembled reinforced concrete side crash barrier for connecting bridges as claimed in claim 1, wherein: the embedded groove is a stepped groove.
9. The assembly-type reinforced concrete side impact fence for a bridge according to claim 1, wherein: and cement mortar cushion layers are arranged on the groove surface of the embedded groove and the bottom surface of the guardrail.
10. The assembly-type reinforced concrete side impact fence for a bridge according to claim 9, wherein: and a water stop strip is arranged in the cement mortar cushion layer.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010073195.8A CN111364356A (en) | 2020-01-22 | 2020-01-22 | Assembled reinforced concrete side anti-collision guardrail for connecting bridge |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010073195.8A CN111364356A (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 |
| CN111910515A (en) * | 2020-07-14 | 2020-11-10 | 重庆中建海龙两江建筑科技有限公司 | Assembled bridge breast board |
| CN113322824A (en) * | 2021-06-15 | 2021-08-31 | 山西高速集团朔神有限责任公司 | Fabricated anti-collision wall applied to high-grade road and construction method thereof |
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| JP3186305U (en) * | 2013-05-28 | 2013-10-03 | エコ ジャパン株式会社 | Parapet combined fence |
| CN108532458A (en) * | 2018-03-16 | 2018-09-14 | 广州市市政工程设计研究总院 | A kind of prefabricated assembled light-duty high-strength Collison fence for bridge |
| CN110205931A (en) * | 2019-07-03 | 2019-09-06 | 广州市市政工程机械施工有限公司 | A kind of prefabricated assembled Collison fence for bridge |
| CN212200050U (en) * | 2020-01-22 | 2020-12-22 | 华南理工大学 | Assembled reinforced concrete side anti-collision guardrail for connecting bridge |
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2020
- 2020-01-22 CN CN202010073195.8A patent/CN111364356A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN201620470U (en) * | 2009-09-29 | 2010-11-03 | 东莞市坚朗五金制品有限公司 | Stand column fixing structure |
| JP3186305U (en) * | 2013-05-28 | 2013-10-03 | エコ ジャパン株式会社 | Parapet combined fence |
| CN108532458A (en) * | 2018-03-16 | 2018-09-14 | 广州市市政工程设计研究总院 | A kind of prefabricated assembled light-duty high-strength Collison fence for bridge |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
| CN111910515A (en) * | 2020-07-14 | 2020-11-10 | 重庆中建海龙两江建筑科技有限公司 | Assembled bridge breast board |
| CN113322824A (en) * | 2021-06-15 | 2021-08-31 | 山西高速集团朔神有限责任公司 | Fabricated anti-collision wall applied to high-grade road and construction method thereof |
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