CN118029251B - Guardrail structure of corrugated steel web combined girder bridge - Google Patents

Abstract

The invention relates to the technical field of bridges, and particularly discloses a guardrail structure of a corrugated steel web combined girder bridge, which comprises the following components: the bridge deck comprises a steel box girder and bridge decks arranged at the top of the steel box girder, wherein two rows of guardrails are respectively arranged at two sides of the top surface of the bridge decks, each guardrail comprises a base, an upright post and at least two cross beams, a first steel cable is transversely arranged in the cross beam positioned above, a second steel cable is transversely arranged in the cross beam positioned below, a third steel cable and a fourth steel cable are arranged between the two cross beams and the upright post, the third steel cable and the fourth steel cable are in an I shape in whole, and one ends of the third steel cable and one end of the fourth steel cable are respectively arranged at two ends positioned in the cross beam above; the invention has the beneficial effects that the clamp piece on one section of guardrail is in a shape of being tightly propped up by the steel cable after being broken, so that a vehicle cannot pass through the steel cable, and meanwhile, the clamp piece and the guardrail can be protruded out of the bridge for a certain distance, the vehicle is buffered by the broken guardrail, and the condition that the vehicle rushes down the bridge is reduced.

Description

Guardrail structure of corrugated steel web combined girder bridge

Technical Field

The invention relates to the technical field of bridges, in particular to a guardrail structure of a corrugated steel web combined girder bridge.

Background

The Chinese patent document with the authorized bulletin number of CN112746561B discloses a bridge guardrail, which comprises a bridge basal plane, wherein a protecting pile is fixedly connected with the outer surface of the bridge basal plane, a greening groove is formed in the top of the protecting pile, a through groove is formed in the outer surface of the protecting pile and below the greening groove, curved grooves are formed in the top and the bottom of the inner surface of the through groove, an elastic mechanism is arranged on the inner surface of the curved groove, and curved rods are uniformly and slidably connected between one sides of the two curved grooves.

The both sides of bridge can be provided with the guardrail and prevent that vehicle or pedestrian from dropping from the bridge generally, but when the vehicle strikes on the bridge guardrail, the impact of vehicle acts on the guardrail completely, extremely leads to the guardrail to damage easily, and the vehicle dashes down the bridge and causes serious accident.

Disclosure of Invention

The invention provides a guardrail structure of a corrugated steel web combined beam bridge, and aims to solve the problems that in the related art, the guardrail is damaged and the vehicle rushes down the bridge because the impact force of the vehicle is completely acted on the guardrail.

The utility model provides a guardrail structure of wave form steel web combination beam bridge, including steel case roof beam, set up the decking at steel case roof beam top, two rows of guardrails are installed respectively to decking top surface both sides, the guardrail includes base, stand and two piece at least crossbeams, transversely there is first cable in the crossbeam that is located the top, transversely there is the second cable in the crossbeam that is located the below, be provided with third cable and fourth cable between two crossbeams and the stand, third cable and fourth cable overall shape is "worker" style of calligraphy, the one end of third cable and fourth cable sets up the both ends in the crossbeam that is located the top respectively, the other end of third cable and fourth cable passes the both ends that the stand is located the crossbeam of below respectively, the both ends of third cable and fourth cable are all not at the same end of two crossbeams, the clamp piece that is used for making third cable and fourth cable merge together is all installed to the upper and lower both ends of fourth cable, the first cable and second cable in the guardrail are connected with the third cable and fourth cable in the adjacent guardrail respectively.

Preferably, the clamp piece includes left clamp and right clamp, and the one end of left clamp and right clamp is provided with the connection structure that is used for making both same one end lock together, has the opening between the other end of left clamp and right clamp, and left clamp and right clamp are close to the position structural strength of opening part minimum to when third cable wire and fourth cable wire receive the pulling force that makes both mutually separate, make left clamp and right clamp bend from the easy groove, thereby make the opening increase, make third cable wire or fourth cable wire go out from the opening part.

Preferably, the both sides of left clamp and right clamp have all been seted up the easy groove of buckling of anti- "匚" shape, and the part that easy groove encircleed left clamp or right clamp forms the limiting plate, and when the position that left clamp and right clamp are close to the opening part was buckled, the limiting plate inwards rotated to block and keep away from open-ended third cable wire or fourth cable wire.

Preferably, the easy-to-break groove on the left clamp and the easy-to-break groove on the right clamp are staggered.

Preferably, the connection structure includes left connecting plate and right connecting plate that set up respectively on left clamp and right clamp, and left connecting plate staggers each other with right connecting plate, has all seted up the through-hole on left connecting plate and the right connecting plate, and first thread bush of fixedly connected with and second thread bush respectively on the side of left clamp and right clamp, through bolted connection between left connecting plate and the second thread bush, also through bolted connection between right connecting plate and the first thread bush.

Preferably, the first thread bush and the second thread bush are close to the bending part of the easy-to-break groove.

Preferably, the two ends of the first steel rope, the second steel rope, the third steel rope and the fourth steel rope are respectively provided with a connecting buckle, and the connecting buckles on the two cables are connected together through bolts.

Preferably, a shielding plate for shielding the steel cable is arranged on one side of the upright post and the cross beam, which is close to the beam bridge.

Preferably, triangular guide plates are arranged on the two inner side walls of the upright post and the upper and lower inner walls of the cross beam in an array manner along the length direction of the upright post.

Preferably, the cross beams of two adjacent guardrails are connected together by bolts.

By adopting the technical scheme, the invention has the beneficial effects that: the clamp piece on one section of guardrail is collapsed, and then the steel cable is tightly supported to form an X shape, so that a vehicle cannot pass through the steel cable, and meanwhile, the clamp piece can protrude outwards from the bridge for a certain distance, and the guardrail and the clamp piece are utilized to buffer the vehicle, so that the condition that the vehicle rushes down the bridge is reduced.

Drawings

Fig. 1 is a schematic structural view of the present invention.

Fig. 2 is a schematic structural view of the guardrail according to the present invention.

Fig. 3 is a schematic view of the structure of the steel rope in the guardrail according to the present invention.

Fig. 4 is a schematic diagram of the connection of the steel cable between two guardrails in the present invention.

Fig. 5 is a schematic view of the structure of the cable of the present invention after being stretched.

Fig. 6 is a schematic structural view of the clip member of the present invention.

Fig. 7 is a schematic view of an exploded construction of the yoke member of the present invention.

Fig. 8 is a schematic view of the structure of a steel cord according to the present invention after it is removed from the yoke member.

Reference numerals:

1. A steel box girder; 2. a bridge deck; 3. guard bars; 31. a base; 32. a column; 321. a shielding plate; 322. triangular guide plates; 33. a cross beam; 34. a first wire rope; 35. a second wire rope; 36. a third wire rope; 37. a fourth wire rope; 38. a clip member; 381. a left clamp; 3811. a first threaded sleeve; 382. a right clamp; 3821. a second threaded sleeve; 383. an easy-to-fold groove; 3831. a vertical section; 3832. a horizontal section; 384. a limiting plate; 385. a connection structure; 3851. a left connecting plate; 3852. a right connecting plate; 39. and (5) connecting buckles.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below by referring to the drawings are illustrative and intended to explain the present invention and should not be construed as limiting the invention.

As shown in fig. 1-8, a guardrail structure of a corrugated steel web composite girder bridge comprises a steel box girder 1, a bridge deck 2 arranged at the top of the steel box girder 1, two rows of guardrails 3 are respectively arranged at two sides of the top surface of the bridge deck 2, the length of one section of guardrails 3 is about one meter, each guardrail 3 comprises a base 31, a column 32 and at least two cross beams 33, triangular guide plates 322 are arranged on the two inner side walls of the column 32 and the upper and lower inner walls of the cross beams 33 in an array manner along the length direction, a shielding plate 321 for shielding steel ropes is arranged at one side of the column 32 and the cross beams 33, the cross beams 33 of two adjacent guardrails 3 are connected together through bolts, a first steel rope 34 is traversed in the cross beam 33 positioned at the upper side, a second steel rope 35 is traversed in the cross beam 33 positioned at the lower side, a third steel rope 36 and a fourth steel rope 37 are arranged between the two cross beams 33 and the column 32, the third steel rope 36 and the fourth steel rope 37 are in an I shape, one ends of the third steel cable 36 and the fourth steel cable 37 are respectively arranged at two ends in the upper beam 33, the other ends of the third steel cable 36 and the fourth steel cable 37 pass through two ends of the upright 32 in the lower beam 33 respectively, the two ends of the third steel cable 36 and the fourth steel cable 37 are not arranged at the same end of the two beams 33, namely the third steel cable 36 and the fourth steel cable 37 are mutually crossed and straightened to form an X shape, the two ends of the first steel cable 34, the second steel cable 35, the third steel cable 36 and the fourth steel cable 37 are respectively provided with a connecting buckle 39, the connecting buckles 39 on the two cables are connected together through bolts, when the guardrail 3 is broken, the strength of the shielding plate 321 is lower, the third steel cable 36 and the fourth steel cable 37 are tensioned along the triangular guide plate 322 to be separated from the upright 32, simultaneously the third steel cable 36 and the fourth steel cable 37 are pushed outwards by a vehicle to form the X shape, the vehicle cannot pass through the gaps between the ropes.

The upper and lower ends of the overlapping portion of the third and fourth wires 36 and 37 are respectively provided with a clip member 38 for combining the third and fourth wires 36 and 37 together, and both ends of the first and second wires 34 and 35 in the guardrail 3 are connected to the third and fourth wires 36 and 37 in the adjacent guardrail 3, respectively.

The clamp member 38 comprises a left clamp 381 and a right clamp 382, one ends of the left clamp 381 and the right clamp 382 are provided with a connecting structure 385 used for enabling the same ends of the left clamp 381 and the right clamp 382 to be locked together, openings are formed between the other ends of the left clamp 381 and the right clamp 382, both sides of the left clamp 381 and the right clamp 382 are respectively provided with a reverse- 匚 -shaped flexible groove 383, the vertical section 383 of the flexible groove 383 is approximately one fourth of the length of the clamp member 38 from the opening, one end of the horizontal section 383, which is far from the vertical section 383, is located in the middle of the clamp member 38, therefore, the structural strength of the left clamp 381 and the right clamp 382 at the vertical section 383 is minimum, compared with other parts, deformation is easy to occur on the flexible groove 383 on the left clamp 381 and the right clamp 382, the flexible groove 383 surrounds the left clamp 381 or the right clamp 382 to form a limiting plate 384, when the positions of the left clamp 381 and the right clamp 382, which are close to the openings are bent inwards, so that the third steel cable 36 or the fourth cable 37 which are far from the openings are blocked, and the opening is bent away from the third cable 36 or the fourth cable 37, and the opening is increased when the third cable 381 and the fourth cable 37 are separated from the opening and the opening is bent from the opening.

The connection structure 385 includes a left connection board 3851 and a right connection board 3852 which are respectively arranged on the left clamp 381 and the right clamp 382, the left connection board 3851 and the right connection board 3852 are staggered and can slide mutually, through holes are respectively formed in the left connection board 3851 and the right connection board 3852, a first thread bush 3811 and a second thread bush 3821 are respectively fixedly connected to the side faces of the left clamp 381 and the right clamp 382, the first thread bush 3811 and the second thread bush 3821 are in an overlapped position with the projection of the frangible groove 383 in the horizontal direction, the left connection board 3851 and the second thread bush 3821 are connected through bolts and are close to the second thread bush 3821 through bolts, the right connection board 3852 and the first thread bush 3811 are also connected through bolts and are close to the first thread bush 3811 through bolts, and therefore the structural strength of the left clamp 381 (the right clamp 382) between the vertical section 3831 and the left connection board 3851 (the right connection board 3852) is increased through bolts.

Working principle: when the vehicle breaks the guardrail 3, since the wire rope group in the guardrail 3 is blocked in front of the vehicle and since the third wire rope 36 and the fourth wire rope 37 are combined together by the clip members 38, when the wire rope group is pushed by the vehicle to be punched outwards, the third wire rope 36 and the fourth wire rope 37 are respectively pulled towards both ends to have deformation approaching to an X shape, so the third wire rope 36 or the fourth wire rope 37 near the opening of the clip members 38 is pressed towards the opening, the left clip 381 and the right clip 382 are outwards overturned and deformed by taking the vertical section 3831 of the frangible groove 383 as the rotation axis, and simultaneously, the limiting plate 384 is inwards overturned to be positioned between the third wire rope 36 and the fourth wire rope 37, when the third steel cable 36 or the fourth steel cable 37 is completely separated from the clamp piece 38, the other steel cable is clamped in the clamp piece 38 by the limiting plate 384, so that the clamp piece 38 is prevented from being broken to hit other vehicles for pedestrians, potential safety hazards are reduced, finally, the third steel cable 36 and the fourth steel cable 37 are changed into X shapes from I shapes, after two sections of guardrails 3 are broken, the clamp piece 38 on one section of guardrails 3 is broken, the vehicles cannot pass through the steel cables, a certain distance can be protruded out of a bridge, the guardrails 3 are utilized for primary buffering, then the clamp piece 38 on the steel cable is broken to buffer the vehicles, and the condition that the vehicles hit a bridge is reduced.

While embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the invention.

Claims (5)

1. A guardrail structure of a corrugated steel web composite girder bridge, comprising: the bridge deck plate (2) arranged at the top of the steel box girder (1), two rows of guardrails (3) are respectively arranged at two sides of the top surface of the bridge deck plate (2), the bridge deck plate is characterized in that the guardrails (3) comprise a base (31), an upright post (32) and at least two cross beams (33), a first steel cable (34) is transversely arranged in the cross beam (33) positioned above, a second steel cable (35) is transversely arranged in the cross beam (33) positioned below, a third steel cable (36) and a fourth steel cable (37) are arranged between the two cross beams and the upright post (32), the whole shape of the third steel cable (36) and the fourth steel cable (37) is I-shaped, one ends of the third steel cable (36) and the fourth steel cable (37) are respectively arranged at two ends positioned in the cross beam (33) above, the other ends of the third steel cable (36) and the fourth steel cable (37) penetrate through two ends of the cross beam (32) positioned below, two ends of the third steel cable (36) and the fourth steel cable (37) are not positioned at two ends of the cross beam (33) respectively, the same part of the third steel cable (36) and the fourth steel cable (37) are overlapped together, the two ends of the third steel cable (36) and the fourth steel cable (37) are used for combining the two parts (37), the two ends of the first steel rope (34) and the second steel rope (35) in the guardrail (3) are respectively connected with the third steel rope (36) and the fourth steel rope (37) in the adjacent guardrail (3);

The clamp piece (38) comprises a left clamp (381) and a right clamp (382), one ends of the left clamp (381) and the right clamp (382) are provided with a connecting structure (385) for locking the same ends of the left clamp (381) and the right clamp (382), an opening is formed between the other ends of the left clamp (381) and the right clamp (382), the structural strength of the positions, close to the opening, of the left clamp (381) and the right clamp (382) is the smallest, and therefore when the third steel cable (36) and the fourth steel cable (37) are subjected to tensile force for separating the left clamp (381) and the right clamp (382) from the easily-folded groove (383), the opening is enlarged, and the third steel cable (36) or the fourth steel cable (37) is discharged from the opening;

The left clamp (381) and the right clamp (382) are provided with reverse 匚 -shaped easily-folded grooves (383) on both sides, the easily-folded grooves (383) surround the left clamp (381) or the right clamp (382) to form a limiting plate (384), and when the positions of the left clamp (381) and the right clamp (382) close to the opening are bent, the limiting plate (384) rotates inwards so as to clamp a third steel cable (36) or a fourth steel cable (37) far away from the opening;

The easy-to-fold groove (383) on the left clamp (381) and the easy-to-fold groove (383) on the right clamp (382) are staggered;

the connecting structure (385) comprises a left connecting plate (3851) and a right connecting plate (3852) which are respectively arranged on a left clamp (381) and a right clamp (382), the left connecting plate (3851) and the right connecting plate (3852) are staggered, through holes are formed in the left connecting plate (3851) and the right connecting plate (3852), a first thread bush (3811) and a second thread bush (3821) are respectively fixedly connected to the side surfaces of the left clamp (381) and the right clamp (382), the left connecting plate (3851) is connected with the second thread bush (3821) through bolts, and the right connecting plate (3852) is also connected with the first thread bush (3811) through bolts;

The first thread bush (3811) and the second thread bush (3821) are close to the bending position of the easy-to-break groove (383).

2. Guardrail structure of a corrugated steel web composite girder bridge according to claim 1, characterized in that both ends of the first steel rope (34), the second steel rope (35), the third steel rope (36) and the fourth steel rope (37) are provided with connecting buckles (39), and the connecting buckles (39) on the two cables are connected together by bolts.

3. Guardrail structure of a corrugated steel web composite girder bridge according to claim 1, characterized in that the side of the upright (32) and the cross beam (33) close to the girder bridge is provided with a shielding plate (321) for shielding the steel ropes.

4. A guardrail structure of a corrugated steel web composite girder bridge according to claim 3, wherein triangular guide plates (322) are arranged on the upper inner wall and the lower inner wall of the upright post (32) and the upper inner wall and the lower inner wall of the cross beam (33) in an array along the length direction of the upright post.

5. Guardrail structure of a corrugated steel web composite girder bridge according to any of the claims 1-4, characterized in that the cross beams of two adjacent guardrails (3) are connected together by means of bolts.