A multifunctional steel structure bridge anti-collision guardrail and construction method thereof

Abstract

The present invention provides a multifunctional steel structure bridge anti-collision guardrail and a construction method thereof. The anti-collision guardrail includes a reinforced concrete base, steel columns, steel column stiffening plates, and anti-collision steel guard plates; the reinforced concrete base is located on the top surface of the main beam, and a steel column is provided above it; the inner side anti-collision steel guard plates and the outer side anti-collision steel guard plates are connected to both sides of the steel column; the inner side anti-collision steel guard plates are connected to the inner side of the steel column through a square steel pipe, and the square steel pipe has an anti-collision function; the outer side anti-collision steel guard plates are connected to the outer side of the steel column through a channel steel, and the steel guard plates can prevent falling objects from high altitudes, and the grooves of the channel steel can also serve as pipeline supports. The present invention is a quick-joining steel guardrail, and the structure is mostly fixed with bolts, which can realize quick connection, installation and disassembly, and has a wide range of applications; at the same time, the reinforced concrete construction volume is low, the cost is low, and it is convenient for overall prefabrication, which can reduce the workload of high-altitude operations and reduce the difficulty of on-site template construction.

Description

Technical Field

[0001] The present invention belongs to the technical field of bridge engineering, and relates to the technical field of metal anti-collision guardrails of auxiliary structures in bridge engineering, and specifically to a multifunctional steel structure bridge anti-collision guardrail and a construction method thereof. Background Art

[0002] A crash barrier is an ancillary structure in bridge construction. Specifically, it's a protective structure installed on the road to prevent uncontrolled vehicles from crossing the roadway, thereby preventing or minimizing casualties and material damage. Installing a crash barrier on a bridge not only improves the safety of vehicles traveling on the bridge, but also prevents vehicles from crossing the roadway or the bridge, potentially causing secondary accidents.

[0003] At present, the more common anti-collision guardrails in bridge projects can be divided into two categories: concrete guardrails and steel guardrails:

[0004] 1. Concrete guardrails. Concrete guardrails offer strong protection and low construction costs, making them the most widely used guardrail structure. However, in the current era of rapid construction, concrete guardrails present significant challenges: large on-site rebar tying requirements, difficulty pouring concrete at high-altitude edges, significant safety risks, and long construction periods. During operation, concrete guardrails are prone to surface cracking, which is difficult to repair.

[0005] 2. Steel guardrails. Existing steel guardrails are primarily of two types: horizontal bar guardrails and steel box guardrails. When used in high-rise interchanges, horizontal bar guardrails offer poor visual shielding, can create a sense of panic, and are prone to throwing objects from heights. Steel box guardrails offer greater integrity than horizontal bar guardrails, but they use twice as much steel and require extensive on-site welding, often in small spaces. This makes welding quality difficult to guarantee and subsequent maintenance challenging. Summary of the Invention

[0006] In order to solve the above-mentioned problems existing in the prior art, the present invention provides a multifunctional steel structure bridge anti-collision guardrail and its construction method, so as to achieve a wide range of applications, simple anti-collision structure, reliable connection, easy construction, and convenient subsequent installation, maintenance and replacement. At the same time, it has the multifunctional purpose of being conducive to the arrangement of pipelines in the anti-collision wall and preventing falling objects from high altitude.

[0007] The technical solution adopted by the present invention to solve the technical problem is:

[0008] A multifunctional steel structure bridge anti-collision guardrail, which is arranged along the longitudinal direction of the bridge and includes a reinforced concrete base, steel columns, steel column stiffening plates, and anti-collision steel guard plates. The reinforced concrete base is located on the top surface of the main beam, and steel columns are arranged above the reinforced concrete base. The steel columns are trapezoidal structures that are narrow at the top and wide at the bottom, and steel column stiffening plates are arranged at the webs of the trapezoidal structures. The steel columns are connected to anti-collision steel guard plates, including inner side anti-collision steel guard plates and outer side anti-collision steel guard plates. The inner side anti-collision steel guard plates are connected to the inner side surfaces of the steel columns through square steel pipes, which serve as fixed bases for the anti-collision main structure and the inner side anti-collision steel guard plates; the outer side anti-collision steel guard plates are connected to the outer side surfaces of the steel columns through channel steels; the channel steels can be used as outer side anti-collision steel guard plates, and the grooves of the channel steels can be used as pipeline bridges. The reinforced concrete base is connected to the cast-in-place main beam through the pre-embedded steel bars of the main beam located on the upper part of the main beam; the steel column is connected to the reinforced concrete base through the pre-embedded bolts in the reinforced concrete base.

[0009] Furthermore, the steel column and the anti-collision steel guard plate are connected by channel steel, square steel tubes, and ordinary bolts; wherein, the two sides of the channel steel are respectively connected to the outer side anti-collision steel guard plate and the outer side of the steel column by bolts, and the inner side anti-collision steel guard plate is connected to the inner side of the steel column by square steel tubes and bolts. Furthermore, the inner side anti-collision steel guard plate extends to the top of the steel column, and the steel column and the inner side anti-collision steel guard plate are connected by bolts at the top of the steel column.

[0010] Furthermore, the reinforced concrete base is connected to the inner side anti-collision steel guard plate through angle steel, the angle steel is pre-connected to the reinforced concrete base through embedded anchor bars, and the angle steel is connected to the inner side anti-collision steel guard plate through bolts.

[0011] Furthermore, the main beam is connected to the outer side anti-collision steel guard plate through angle steel, the angle steel is connected to the main beam through anchor bars and rebar, and the angle steel is connected to the outer side anti-collision steel guard plate through ordinary bolts.

[0012] Furthermore, the height of the reinforced concrete base is 10 to 12 times the diameter of the embedded steel bars in the main beam above the main beam. This ensures sufficient anchorage length between the reinforced concrete base and the embedded steel bars in the main beam, as well as between the embedded bolts in the anti-collision steel columns and the reinforced concrete base, and between the angle steel anchor bars and the reinforced concrete base and main beam. Furthermore, embedded parts such as embedded bolts and angle steel anchor bars are installed at the main beam connection, and the reinforced concrete base is cast.

[0013] The present invention also provides a construction method of a steel structure multifunctional anti-collision guardrail, comprising the following steps:

[0014] (1) Install foundation reinforcement and formwork on the bridge deck, and embed bolts, angle steel anchor bars and other embedded parts;

[0015] (2) Casting reinforced concrete base;

[0016] (3) Processing the various steel components of the anti-collision guardrail in the factory;

[0017] (4) Use bolt connections to install anti-collision steel columns, channel steels, square steel pipes and anti-collision steel guard plates in sequence.

[0018] Compared with the traditional pouring concrete anti-collision guardrail technology, the beneficial effects of the present invention are:

[0019] 1. The base of the present invention adopts a reinforced concrete structure, and the anti-collision body is a steel structure. Compared with the traditional cast-in-place reinforced concrete anti-collision guardrail, it reduces a lot of reinforced concrete construction workload, facilitates the overall prefabrication of the anti-collision guardrail, improves the structure prefabrication rate, reduces the workload of high-altitude operations on the construction site, and reduces the difficulty of on-site template construction.

[0020] 2. The concrete base of the present invention is easy to connect to various bridge structures and avoids the steel base from being damaged by subsequent bridge deck maintenance vehicles (sweeping the ground, clearing snow).

[0021] 3. Unlike concrete guardrails, this invention features a quick-connect steel guardrail with bolted posts and crossbars, enabling quick installation and disassembly after a collision, making it easy to replace the guardrail. This has broad application prospects in both the construction of new bridge guardrails and the repair of existing ones, fully meeting current bridge construction needs.

[0022] 4. Different from the buried pipe wiring scheme of traditional guardrails, the present invention is equipped with fixed channel steel as a wiring bridge, which has greater freedom in cable layout and leaves sufficient cable layout space for intelligent control and lighting of the bridge.

[0023] 5. Different from traditional steel guardrails, the present invention adjusts the distribution position of traditional base and column anchor bolts, thereby improving the anchoring effect.

[0024] 6. Different from the traditional horizontal bar steel guardrail, the inner square steel tube of the present invention has an anti-collision function, and the outer side anti-collision steel guard plate is added to protect the internal pipelines while improving the overall landscape effect, increasing the buffering capacity of the guardrail, and having an overall shielding function to avoid the sense of panic caused by the line of sight penetrating the guardrail grille and prevent falling objects from high altitude.

[0025] 7. Different from the traditional steel box type guardrail, this invention reduces the steel consumption by about 50% on the basis of improving the anti-collision ability, and the cost is close to that of concrete guardrail.

[0026] 8. The main components of the present invention are all custom-made in the factory, with a neat overall appearance and good landscape effect.

[0027] 9. The anti-collision guardrail of the present invention has good adaptability. It can be used not only for new bridges but also for the rapid maintenance of old bridges. The risk of falling objects from high altitudes during construction is lower than that of traditional anti-collision guardrails. It can be widely used in the maintenance of urban bridge guardrails. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The accompanying drawings, which constitute part of this application, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an undue limitation of the present invention. In the accompanying drawings:

[0029] Figure 1 A cross-sectional schematic diagram of a multifunctional steel structure bridge anti-collision guardrail connected to a main beam based on a reinforced concrete base according to a specific embodiment;

[0030] Figure 2 A schematic plan view of a multifunctional steel structure bridge anti-collision guardrail according to a specific embodiment;

[0031] Figure 3 A schematic elevation diagram of a multifunctional steel structure bridge anti-collision guardrail according to a specific embodiment;

[0032] In the picture:

[0033] 1-Reinforced concrete base; 2-Embedded bolts; 3-Steel column; 4-Steel column stiffener; 5-Inner side anti-collision steel guard plate; 6-Outer side anti-collision steel guard plate; 7-Square steel pipe; 8-Channel steel; 9-1-Angle steel 1; 9-2-Angle steel 2; 10-1-Anchor bar 1; 10-2-Anchor bar 2; 11-Main beam; 12-Main beam embedded steel bars; 13-1-Bolt 1; 13-2-Bolt 2; 13-3-Bolt 3; 13-4-Bolt 4; 13-5-Bolt 5. DETAILED DESCRIPTION

[0034] The following is a further detailed description of the installation and connection methods of the multifunctional steel structure anti-collision guardrail proposed in the present invention in conjunction with the accompanying drawings and specific embodiments. According to the following description, the advantages and features of the present invention will become clearer. The following will describe in detail the technical content and features of the present invention by combining the enumerated embodiments with the accompanying drawings. It should be noted that the drawings are all in a very simplified form and are not in precise proportions, and are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the present invention.

[0035] See also Figures 1 to 3As shown, a multifunctional steel bridge crash barrier is designed. The crash barrier is arranged along the longitudinal direction of the bridge and includes a reinforced concrete base, steel columns, steel column stiffeners, and crash-resistant steel guard plates. The reinforced concrete base 1 is located on the top surface of the main beam 11 and is cast with high-performance, low-shrinkage, early-strength concrete. Steel columns 3 are positioned above the reinforced concrete base 1. The steel columns 3 are trapezoidal structures, narrow at the top and wide at the bottom. Steel column stiffeners 4 are installed at the web of the trapezoidal structure. Connected to the steel columns 3 are crash-resistant steel guard plates, including inner and outer side crash-resistant steel guard plates 5 and 6. The inner side crash-resistant steel guard plates 5 are connected to the inner side of the steel columns 3 via square steel tubes 7, which serve as a fixed base for the main crash-resistant structure and the inner side crash-resistant steel guard plates 5. The outer side crash-resistant steel guard plates 6 are connected to the outer side of the steel columns 3 via channel steel 8. The channel steel 8 serves as the outer side crash-resistant steel guard plates 6, and the grooves in the channel steel serve as pipeline bridges. The reinforced concrete base 1 is connected to the main beam 11 by the main beam embedded steel bars 12 located at the upper part of the main beam; the steel column 3 is connected to the reinforced concrete base 1 by the embedded bolts 2 in the reinforced concrete base 1, and the height of the reinforced concrete base 1 is 10 to 12 times the diameter of the main beam embedded steel bars 12 above the main beam.

[0036] The steel column and the anti-collision steel guard plate are connected by channel steel, square steel pipe and ordinary bolts, and the connection method is specifically as follows: the two sides of the channel steel 8 are respectively connected to the outer side anti-collision steel guard plate 6 and the outer side of the steel column 3 by bolts 4 (13-4), and the inner side anti-collision steel guard plate 5 is connected to the inner side of the steel column 3 by square steel pipe 7 and bolts 2 (13-2); the inner side anti-collision steel guard plate 5 extends to the top of the steel column 3, and the steel column 3 and the inner side anti-collision steel guard plate 5 are connected at the top of the steel column 3 by bolts 3 (13-3).

[0037] The reinforced concrete base 1 is connected to the inner side anti-collision steel guard plate 5 through the angle steel 1 (9-1), the angle steel 1 (9-1) and the reinforced concrete base 1 are pre-embedded and connected through the anchor bar 1 (10-1), and the angle steel 1 (9-1) and the inner side anti-collision steel guard plate 5 are connected through the bolt 1 (13-1).

[0038] The main beam 11 is connected to the outer side anti-collision steel guard plate 6 through the angle steel 2 (9-2), the angle steel 2 (9-2) is connected to the main beam 11 through the anchor bar 2 (10-2) embedded steel bar, and the angle steel 2 (9-2) is connected to the outer side anti-collision steel guard plate 6 through the bolt 5 (13-5).

[0039] Bolt 1 (13-1), bolt 2 (13-2), bolt 3 (13-3), bolt 4 (13-4) and bolt 5 (13-5) are preferably ordinary bolts.

[0040] The rapid construction method of the steel structure multifunctional anti-collision guardrail of the present invention includes but is not limited to the following steps:

[0041] 1) Set up foundation steel bars and formwork on the bridge deck, and embed bolts, angle steel anchor bars and other embedded parts;

[0042] 2) Casting reinforced concrete base;

[0043] 3) Processing the various steel components of the anti-collision guardrail in the factory;

[0044] 4) Use bolt connections to install anti-collision steel columns, channel steels, square steel pipes and anti-collision steel guard plates in sequence.

[0045] In more detail, the anti-collision steel columns are connected by pre-buried bolts, and the anti-collision steel columns must meet the stress and stability requirements of the anti-collision guardrail. Channel steel and anti-collision square steel pipes are set on both sides of the anti-collision steel columns. The specifications, dimensions, layout spacing and welding process of the channel steel must meet the requirements of cable threading. The specifications, dimensions, layout spacing and welding process of the anti-collision square steel pipes must meet the stress and stability requirements of the anti-collision guardrail. The coating of the anti-collision steel guard plate must meet the requirements of corrosion resistance and aesthetics. The selected bolt specifications and layout spacing must meet the stress and stability requirements of the anti-collision steel guard plate. The above-mentioned process and technical requirements are all within the scope of existing technology.

[0046] The steel structure multifunctional anti-collision guardrail has a simple structure, reliable connection, easy construction, and convenient subsequent maintenance and replacement. It is easy to ensure the normal use function of the steel structure multifunctional anti-collision guardrail and has a high promotion value.

[0047] The production and installation are not limited to the schematic shape of the anti-collision steel guard plate, the schematic shape of the anti-collision steel column, the base casting material, and the bolt connection method of the steel structure multifunctional anti-collision guardrail. Other external components and installation processes should also be within the technical protection scope of the present invention.

[0048] The connection method is not limited to the connection between the steel structure multifunctional anti-collision guardrail and the main beam, and is also within the technical protection scope of the present invention when it is set between the steel structure multifunctional anti-collision guardrail and the retaining wall behind the abutment.

[0049] The above description is only a description of the preferred embodiments of the present invention and does not limit the scope of the present invention. Any changes and modifications made by ordinary technicians in the field of the present invention based on the above disclosure shall fall within the scope of protection of the claims.

Claims

1. A multifunctional steel structure bridge anti-collision guardrail, which is arranged along the longitudinal direction of the bridge and is characterized in that: The invention comprises a reinforced concrete base, a steel column, a steel column stiffening plate, and an anti-collision steel guard plate; the reinforced concrete base (1) is located on the top surface of the main beam (11), and a steel column (3) is arranged above the reinforced concrete base (1); the steel column (3) is a trapezoidal structure with a narrow top and a wide bottom, and a steel column stiffening plate (4) is arranged at the web of the trapezoidal structure; the steel column (3) is connected to the anti-collision steel guard plate, including an inner side anti-collision steel guard plate (5) and an outer side anti-collision steel guard plate (6), and the inner side anti-collision steel guard plate (5) is connected to the anti-collision steel guard plate by a square steel The pipe (7) is connected to the inner side of the steel column (3), and the outer side anti-collision steel guard plate (6) is connected to the outer side of the steel column (3) through the channel steel (8); the two sides of the channel steel (8) are respectively connected to the outer side anti-collision steel guard plate (6) and the outer side of the steel column (3) through the fourth bolt (13-4), and the inner side anti-collision steel guard plate (5) is connected to the inner side of the steel column (3) through the square steel pipe (7) and the second bolt (13-2); the inner side anti-collision steel guard plate (5) extends to the top of the steel column (3), and the steel column (3) ) is connected to the inner side anti-collision steel guard plate (5) at the top of the steel column (3) through a third bolt (13-3); the reinforced concrete base (1) is connected to the main beam (11) by cast-in-situ through the main beam pre-embedded steel bars (12) located on the upper part of the main beam; the steel column (3) is connected to the reinforced concrete base (1) through the pre-embedded bolts (2) in the reinforced concrete base (1); the reinforced concrete base (1) is connected to the inner side anti-collision steel guard plate (5) through the first angle steel (9-1), and the first angle steel (9- 1) is pre-buried and connected to the reinforced concrete base (1) through a first anchor bar (10-1), the first angle steel (9-1) is connected to the inner side anti-collision steel guard plate (5) through a first bolt (13-1); the main beam (11) is connected to the outer side anti-collision steel guard plate (6) through a second angle steel (9-2), the second angle steel (9-2) is connected to the main beam (11) through a second anchor bar (10-2), and the second angle steel (9-2) is connected to the outer side anti-collision steel guard plate (6) through a fifth bolt (13-5).

2. The multifunctional steel structure bridge anti-collision guardrail according to claim 1 is characterized in that: The height of the reinforced concrete base (1) is 10 to 12 times the diameter of the pre-embedded steel bars (12) of the main beam.

3. The construction method of a multifunctional steel structure bridge anti-collision guardrail according to claim 1 comprises the following steps: (1) Set up the foundation steel bars and formwork on the bridge deck, and embed bolts and angle steel anchor bars; (2) Casting reinforced concrete foundation; (3) Processing the various steel components of the anti-collision guardrail in the factory; (4) Use bolt connections to install anti-collision steel columns, channel steels, square steel pipes and anti-collision steel guard plates in sequence.

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