CN215857206U - Anti-collision guardrail structure capable of being used at expansion joint of long-span bridge - Google Patents

Abstract

The utility model discloses an anti-collision guardrail structure capable of being used at an expansion joint of a long-span bridge, which comprises a first cross beam, a second cross beam, a middle cross beam and a rolling assembly, wherein the first cross beam and the second cross beam are respectively arranged at two sides of the expansion joint, one end of the middle cross beam is connected with the first cross beam, the rolling assembly is arranged in the second cross beam, the rolling assembly comprises a connecting shaft and rolling wheels arranged at two ends of the connecting shaft, the other end of the middle cross beam is connected with the connecting shaft, and the rolling wheels are in contact with the second cross beam. The utility model has the advantages of good durability, capability of enabling the anti-collision guardrail to resist large deformation and large displacement at the expansion joint when the large-span bridge encounters extreme states such as vortex vibration, flutter and the like, and still keeping an effective working state.

Description

Anti-collision guardrail structure capable of being used at expansion joint of long-span bridge

Technical Field

The utility model relates to the field of bridge structures, in particular to an anti-collision guardrail structure which can be used at a large-span bridge expansion joint.

Background

The large-span bridge is a main engineering structure form spanning the sea, rivers, canyons and the like, and with the continuous optimization and upgrading of the economy of China and the continuous progress of the bridge technology, the sequence of the construction of the large-span bridge is opened in China in the foreseeable future. However, super-large span bridges, especially sea-crossing bridges, face more severe wind-resistant design conditions. In recent years, large-amplitude events such as vortex vibration and the like occur in a large-span bridge, and the bridge structure generates large displacement, large corner and large deformation under the influence of wind vibration. Conventional components, particularly crash barriers, are designed in a static manner, so that damage often occurs to some components, particularly to the barrier at expansion joints.

The conventional steel anti-collision guardrail telescopic device is characterized in that a long round hole is formed in a steel cross beam and connected with a bolt through a connecting sleeve, and when the bridge structure longitudinally stretches and deforms, the bolt moves in the long round hole, so that the steel anti-collision guardrail is stretched and retracted. The steel crash barrier expansion device is good in adaptability to the situation of small expansion amount, but for a long-span bridge structure, the expansion amount of the bridge structure under the load action can reach 20-100cm, the length of a long round hole of the expansion device can be too long, the bolt stroke is too large, a bolt slides in contact with a steel cross beam in the expansion process, the friction loss is serious, and the durability of the structure is poor after the corrosion-resistant layer is abraded. Simultaneously, under the big amplitude deformation of girder structure, the expansion joint department takes place the rupture very easily and loses efficacy.

Therefore, it is necessary to optimize the structure of the crash barrier at the expansion joint of the large-span bridge, and in extreme cases, it is beneficial to ensure that the bridge maintains an effective working state.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects of the prior art, provides the anti-collision guardrail structure which can be used at the expansion joint of the large-span bridge, has good durability, and can resist large deformation and large displacement at the expansion joint of the large-span bridge under the extreme end state of vortex vibration, flutter and the like, and still keep an effective working state.

In order to solve the technical problems, the utility model adopts the following technical scheme:

the utility model provides an anticollision barrier structure that can be used to long span bridge expansion joint department, includes first crossbeam, second crossbeam, middle crossbeam and roll subassembly, first crossbeam with the both sides at expansion joint are located to the second crossbeam branch, middle crossbeam one end with first crossbeam is connected, the roll subassembly is located in the second crossbeam, the roll subassembly includes the connecting axle and locates the gyro wheel at connecting axle both ends, the middle crossbeam other end with the connecting axle links to each other, the gyro wheel with the contact of second crossbeam.

As a further improvement of the above technical solution: the connecting shaft is horizontally arranged, mounting seats are arranged at two ends of the connecting shaft, a bearing is arranged between the connecting shaft and the mounting seats, and the idler wheel is arranged on the mounting seats.

As a further improvement of the above technical solution: the upper side and the lower side of the mounting seat are respectively provided with the idler wheels, the axes of the idler wheels are horizontally arranged, the idler wheels at the upper side are positioned above the connecting shaft, and the idler wheels at the lower side are provided with two idler wheels which are symmetrically arranged below the connecting shaft.

As a further improvement of the above technical solution: the mounting seat comprises two mounting plates with two ends arranged in parallel, the end parts of the two mounting plates are connected through a U-shaped connecting plate, and the idler wheels are arranged between the two mounting plates.

As a further improvement of the above technical solution: the middle cross beam is connected with the first cross beam through an anchor bolt.

As a further improvement of the above technical solution: and a wear-resistant layer is arranged in the circumferential direction of the roller.

Compared with the prior art, the utility model has the advantages that:

1) the novel anti-collision guardrail structure capable of being used at the expansion joint of the large-span bridge is characterized in that one end of the middle cross beam is connected with the first cross beam, the other end of the middle cross beam rolls relative to the second cross beam through the rolling assembly to realize the stretching function of the anti-collision guardrail, the conventional contact sliding is changed into rolling movement, the relative friction in the use process is greatly reduced, and the durability of the component is improved;

2) the novel anti-collision guardrail structure which can be used at the expansion joint of the large-span bridge can adapt to the expansion characteristic of the large-span bridge, so that the anti-collision guardrail can resist large deformation and large displacement at the expansion joint and still keep an effective working state when the large-span bridge is in extreme states such as vortex vibration, flutter vibration and the like;

3) the utility model discloses a can be used to the anticollision barrier structure of long span bridge expansion joint department, the striking takes place under normal operating conditions, the reliability is higher for gyro wheel and the contact of second crossbeam.

Drawings

Fig. 1 is a schematic structural view of a crash barrier structure at an expansion joint of a long-span bridge according to the present invention.

Fig. 2 is a perspective view of the rolling assembly according to the present invention.

Fig. 3 is a front view schematically illustrating a rolling assembly according to the present invention.

The reference numerals in the figures denote: 1. a first cross member; 2. a second cross member; 3. a middle cross beam; 4. a rolling component; 41. a connecting shaft; 42. a roller; 43. a mounting seat; 431. mounting a plate; 432. a U-shaped connecting plate; 44. a bearing; 5. an expansion joint; 6. and (6) anchoring the bolt.

Detailed Description

The utility model is described in further detail below with reference to the figures and specific examples of the specification.

Fig. 1 to 3 show an embodiment of an anti-collision guardrail structure applicable to a large-span bridge expansion joint according to the present invention, which includes a first beam 1, a second beam 2, a middle beam 3 and a rolling assembly 4, wherein the first beam 1 and the second beam 2 are respectively disposed at two sides of the expansion joint 5, one end of the middle beam 3 is connected with the first beam 1, the rolling assembly 4 is disposed in the second beam 2, the rolling assembly 4 includes a connecting shaft 41 and rollers 42 disposed at two ends of the connecting shaft 41, the other end of the middle beam 3 is connected with the connecting shaft 41, and the rollers 42 are in contact with the second beam 2. The first cross beam 1 and the middle cross beam 3 can be fixedly connected through anchor bolts 6, the connecting structure is reliable, the disassembly and the assembly are convenient, and other connecting modes can be adopted in other embodiments; the circumference of the roller 42 may be provided with a wear-resistant layer (not shown in the figure), which increases the wear resistance of the roller 42 and further prolongs the service life, and the wear-resistant layer may be a nylon layer, for example, which has good wear resistance and self-lubricating property.

Further, in the present embodiment, the connecting shaft 41 is horizontally disposed, and both ends of the connecting shaft are provided with the mounting seats 43, the bearings 44 are disposed between the connecting shaft 41 and the mounting seats 43, and the rollers 42 are disposed on the mounting seats 43. The connecting shaft 41 is horizontally arranged, and a bearing 44 is arranged between the mounting seat 43 and the connecting shaft 41, so that the mounting seat 43 and the roller 42 thereon can integrally rotate relative to the connecting shaft 41, and can adapt to the corner displacement between the first cross beam 1 and the second cross beam 2 at two sides.

Furthermore, in the present embodiment, the upper and lower sides of the mounting seat 43 are provided with the rollers 42, the axes of the rollers 42 are horizontally arranged, the upper roller 42 is located above the connecting shaft 41, and the lower roller 42 is provided with two rollers and symmetrically arranged below the connecting shaft 41, or the two lower rollers 42 are symmetrically arranged about the connecting shaft 41. The rollers 42 arranged in a triangular shape are arranged on the mounting seat 43, so that the mounting seat 43 and the connecting shaft 41 and the like have good stability when moving in the second cross beam 2, and can adapt to large corner displacement between the first cross beam 1 and the second cross beam 2, and the expansion joint 5 is prevented from breaking and losing efficacy under large amplitude deformation.

Furthermore, in this embodiment, the mounting seat 43 includes the mounting plates 431 with two parallel ends, the ends of the two mounting plates 431 are connected by the U-shaped connecting plate 432, the roller 42 is disposed between the two mounting plates 431, the structure is simple and reliable, and the mounting seat 43 can provide a good protection function for the roller 42.

Although the present invention has been described with reference to the preferred embodiments, it is not intended to be limited thereto. Those skilled in the art can make numerous possible variations and modifications to the present invention, or modify equivalent embodiments to equivalent variations, without departing from the scope of the utility model, using the teachings disclosed above. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical spirit of the present invention should fall within the protection scope of the technical scheme of the present invention, unless the technical spirit of the present invention departs from the content of the technical scheme of the present invention.

Claims (6)

1. The utility model provides a can be used to crashproof guardrail structure of long span bridge expansion joint department, includes first crossbeam (1), second crossbeam (2), middle crossbeam (3) and roll subassembly (4), first crossbeam (1) with the both sides of expansion joint (5) are located to second crossbeam (2) branch, middle crossbeam (3) one end with first crossbeam (1) is connected, roll subassembly (4) are located in second crossbeam (2), its characterized in that: the rolling assembly (4) comprises a connecting shaft (41) and rollers (42) arranged at two ends of the connecting shaft (41), the other end of the middle cross beam (3) is connected with the connecting shaft (41), and the rollers (42) are in contact with the second cross beam (2).

2. The crash barrier construction at an expansion joint of a large span bridge as set forth in claim 1, wherein: connecting axle (41) horizontal arrangement and both ends are equipped with mount pad (43), connecting axle (41) with mount pad (43) between be equipped with bearing (44), gyro wheel (42) are located on mount pad (43).

3. The crash barrier construction at an expansion joint of a large span bridge as set forth in claim 2, wherein: both sides all are equipped with about mount pad (43) gyro wheel (42), the axis horizontal arrangement of gyro wheel (42), the upside gyro wheel (42) are located connecting axle (41) top, downside gyro wheel (42) are equipped with two and symmetrical arrangement in the side below of connecting axle (41).

4. The crash barrier construction at an expansion joint of a large span bridge as set forth in claim 2, wherein: the mounting seat (43) comprises mounting plates (431) with two ends arranged in parallel, the end parts of the two mounting plates (431) are connected through a U-shaped connecting plate (432), and the roller (42) is arranged between the two mounting plates (431).

5. A crash barrier construction at an expansion joint of a large span bridge as claimed in any one of claims 1 to 4 wherein: the middle cross beam (3) is connected with the first cross beam (1) through an anchor bolt (6).

6. A crash barrier construction at an expansion joint of a large span bridge as claimed in any one of claims 1 to 4 wherein: and a wear-resistant layer is arranged on the periphery of the roller (42).

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