Anti-collision guardrail structure additionally arranged on existing bridge sidewalk

Abstract

The utility model relates to the technical field of bridge engineering, in particular to an additional anti-collision guardrail structure for an existing bridge sidewalk, which comprises a base (1), a prefabricated outrigger (2), a cement pavement layer (3), a guardrail and a handrail (7), the base (1) is positioned on the cement pavement layer (3) on the top surface of an existing bridge and is fixed on the cement pavement layer (3), and the prefabricated outrigger (2) is fixed on the guardrail (7). The prefabricated outrigger (2) is arranged on the cement pavement layer (3) in an overhanging mode, the prefabricated outrigger (2) is located on the outer side of the base (1) and fixedly connected with the base (1), the guardrail is fixed to the base (1), and the handrail (7) is arranged on the side, away from the guardrail, of the upper surface of the prefabricated outrigger (2). And the safety is enhanced, so that the occurrence of traffic accidents is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of bridge engineering, and more specifically, particularly relates to an anti-collision guardrail structure for adding to an existing bridge sidewalk. Background Art

[0002] The existing conventional practice is to add anti-collision columns by compressing the width of the sidewalk or the width of the driving lane. Compressing the width of the driving lane requires compressing the net width of the bridge, which is difficult to meet the requirements of the construction limit. At the same time, the driving width is different from the road side of the bridge head. The suddenly added anti-collision guardrail is also an obstacle, which can easily cause vehicles to crash into the end of the column and cause accidents. Utility Model Content

[0003] The utility model aims to overcome the problem that adding anti-collision guardrails by compressing the width of sidewalks or lanes may easily cause vehicles to crash into the ends of columns and cause accidents, and aims to provide a technical solution for adding anti-collision guardrails without compressing the width of sidewalks or lanes.

[0004] A structure for adding an anti-collision guardrail to the sidewalk of an existing bridge comprises a base, a prefabricated cantilever beam, a cement paving layer, a guardrail and a handrail, wherein the base is located on the cement paving layer on the top surface of the existing bridge, the base is fixed on the cement paving layer, the prefabricated cantilever beam is cantilevered on the cement paving layer, the prefabricated cantilever beam is located on the outside of the base, the prefabricated cantilever beam is fixedly connected to the base, the guardrail is fixed on the base, and the handrail is arranged on a side of the upper surface of the prefabricated cantilever beam away from the guardrail.

[0005] Furthermore, the guardrail includes a column, on which a first steel pipe, a second steel pipe, a third steel pipe, and a fourth steel pipe are horizontally arranged, the first steel pipe is parallel to the top of the second steel pipe, the first steel pipes are fixedly connected by the third steel pipe, the second steel pipes are fixedly connected by the fourth steel pipe, and the outer diameters of the third steel pipe and the fourth steel pipe are respectively smaller than the first steel pipe and the second steel pipe.

[0006] Furthermore, the first steel pipe is spot-welded to the column, the second steel pipe is bolted to the column, and the first steel pipe and the third steel pipe, as well as the second steel pipe and the fourth steel pipe, are all spot-welded to each other.

[0007] Furthermore, U-shaped anchor bolts and embedded steel bars are embedded inside the base, and anti-torsion steel bars are embedded inside the prefabricated cantilever beam: the end of the anti-torsion steel bar close to the base extends outward to the inside of the base and is tied and connected to the embedded steel bars. The base is fixedly connected to the cement pavement layer by means of embedded steel bars casting.

[0008] Furthermore, two U-shaped anchor bolts are provided, and a flange is provided on the base, and the flange is fixedly connected to the base through the U-shaped anchor bolts.

[0009] Furthermore, first bolt holes are arranged at the four corners of the flange, and the first bolt holes at the four corners of the flange correspond one-to-one to the two ends of the two U-shaped anchor bolts.

[0010] Furthermore, the flange includes an upper flange and a lower flange. The upper flange is arranged on the lower flange. The column is located on the upper flange and welded to the upper flange. The lower flange is embedded in the upper surface of the base. The upper flange is fixedly connected to the lower flange by U-shaped anchor bolts.

[0011] Furthermore, a paint for closing the gap between the U-shaped anchor bolt and the flange is provided between the U-shaped anchor bolt and the flange.

[0012] Furthermore, the bottom surface of the prefabricated cantilever beam includes a flat bottom surface and an inclined bottom surface connected to each other. The flat bottom surface of the prefabricated cantilever beam is close to the base and is arranged on the cement paving layer, and the inclined bottom surface is cantilevered and placed.

[0013] Furthermore, a pedestrian crossing pavement layer is arranged above the prefabricated cantilever beam, and the pedestrian crossing pavement layer includes a cushion slurry layer, a prefabricated sidewalk slab, a mortar layer and sidewalk colored bricks laid in sequence from bottom to top, and the plane of the pedestrian crossing after laying is inclined from outside to inside.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] 1. Compared with the prior art, the utility model is used for adding an anti-collision guardrail structure to the sidewalk of an existing bridge, which includes a base, a prefabricated cantilever beam, a cement paving layer and a column. The utility model adopts an additional prefabricated cantilever beam, which is fixedly connected to the base. The bottom surface of the prefabricated cantilever beam includes a flat ground and an inclined bottom surface. The prefabricated cantilever beam is cantilevered and placed on the cement paving layer. The prefabricated cantilever beam is located on the outside of the base. The flat bottom surface of the prefabricated cantilever beam is close to the base and is arranged on the cement paving layer. The inclined bottom surface of the prefabricated cantilever beam is suspended in the air, and the inclined bottom surface of the prefabricated cantilever beam does not contact the cement paving layer, thereby widening the bridge deck width, so that the added columns do not occupy the area of ​​the sidewalk and the roadway, reducing the occurrence of traffic accidents. At the same time, the use of prefabricated cantilever beams does not require the erection of brackets, and the entire construction process is convenient and quick. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0017] Figure 1 It is a schematic diagram of the overall structure for adding anti-collision columns to existing bridge sidewalks.

[0018] Figure 2 It is a front cross-sectional view of the column structure.

[0019] Figure 3It is a side sectional view of the column structure.

[0020] Figure 4 It is a schematic diagram of the column structure.

[0021] Figure 5 It is a cross-sectional view of the flange structure.

[0022] In the figure: 1. base; 2. prefabricated cantilever beam; 3. cement paving layer; 4. pedestrian crossing paving layer; 5. flange; 6. column; 7. handrail; 8. first bolt hole; 9. U-shaped anchor bolt; 10. nut; 11. bolt; 12. first steel pipe; 13. second steel pipe; 14. third steel pipe; 15. fourth steel pipe; 16. second bolt hole; 17. embedded reinforcement; 18. torsional reinforcement. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] like Figure 1 As shown, the structure for adding an anti-collision guardrail to the sidewalk of an existing bridge in this embodiment includes a base 1, a prefabricated cantilever beam 2, a cement paving layer 3, a guardrail and a handrail 7. The base 1 is located on the cement paving layer 3 on the top surface of the existing bridge, the base 1 is fixed on the cement paving layer 3, the prefabricated cantilever beam 2 is cantilevered on the cement paving layer 3, the prefabricated cantilever beam 2 is located on the outside of the base 1, the prefabricated cantilever beam 2 is fixedly connected to the base 1, the guardrail is fixed to the base 1, the handrail 7 is arranged on the side of the upper surface of the prefabricated cantilever beam 2 away from the guardrail, and the handrail 7 is fixedly connected to the prefabricated cantilever beam 2.

[0025] In this embodiment, if Figure 1As shown, U-shaped anchor bolts 9 and embedded steel bars 17 are embedded in the base 1, and torsion-resistant steel bars 18 are embedded in the prefabricated cantilever beam 2: the end of the torsion-resistant steel bar 18 close to the base 1 extends outward to the inside of the base 1 and is tied and connected with the embedded steel bars 17. The base 1 is fixedly connected to the cement paving layer 3 by means of embedded steel bars casting. The bottom surface of the prefabricated cantilever beam 2 includes a flat bottom surface and an inclined bottom surface connected to each other. The flat bottom surface of the prefabricated cantilever beam 2 is close to the base 1 and is arranged on the cement paving layer 3, and the inclined bottom surface is cantilevered. The guardrail includes a column 6, and the column 6 is located at the bottom On the seat 1, a flange 5 is arranged on the base 1, and first bolt holes 8 are arranged at the four corners of the flange 5. The flange 5 is fixedly connected to the base 1 by U-shaped anchor bolts 9, the column 6 is fixedly connected to the base 1, the handrail 7 is fixedly connected to the prefabricated cantilever beam 2 by bolts through a pre-buried flange, and a crosswalk pavement layer 4 is arranged above the prefabricated cantilever beam 2. The crosswalk pavement layer 4 includes a cushion mortar layer, a prefabricated sidewalk slab, a mortar layer and sidewalk colored bricks laid in sequence from bottom to top, and the plane of the crosswalk after laying is inclined from outside to inside.

[0026] In this embodiment, if Figure 2 As shown, two U-shaped anchor bolts 9 are arranged in the base 1, the opening of the U-shaped anchor bolts 9 is upward, and the two ends of the two U-shaped anchor bolts 9 extend above the base 1, and the flange 5 includes an upper flange and a lower flange, and the lower flange is pre-buried and fixed in the base 1, as shown in FIG. Figure 5 As shown, first bolt holes 8 are set at the four corners of the flange 5. During installation, the four first bolt holes 8 on the flange 5 are inserted into the two ends of the two U-shaped anchor bolts, and then tightened with nuts 10. The column 6 and the flange 5 are connected by bolts, and paint is set between the column 6 and the flange 5 for the gap between the column 6 and the flange 5. The column 6 is fixedly connected to the base 1 through the flange 5.

[0027] In this embodiment, if Figure 3 As shown, two arc-shaped depressions are provided on the inner side of the column 6, and four second bolt holes 16 are respectively provided on the inner sides of the two depressions. When installing the steel pipe column, the second steel pipe 13 is clamped in the depressions of the column 6, and the column 6 and the second steel pipe 13 are fixedly connected by bolts 11.

[0028] In this embodiment, if Figure 4As shown, a first steel pipe 12, a second steel pipe 13, a third steel pipe 14, and a fourth steel pipe 15 are horizontally arranged on the column 6, the first steel pipe 12 is parallel to the top of the second steel pipe 13, the first steel pipes 12 are fixedly connected by the third steel pipe 13, the second steel pipes 12 are fixedly connected by the fourth steel pipe 15, the outer diameters of the third steel pipe 14 and the fourth steel pipe 15 are respectively smaller than the first steel pipe 12 and the second steel pipe 13, the first steel pipe 12 is spot-welded to the column 6, the second steel pipe 13 is connected to the column 6 by bolts 11, and the first steel pipe 12 and the third steel pipe 14, and the second steel pipe 13 and the fourth steel pipe 15 are all connected by spot welding.

[0029] In this embodiment, during installation, after the original sidewalk is dismantled, the cement paving layer 3 is exposed, the flat bottom surface of the prefabricated cantilever beam 2 is placed on the cement paving layer 3, the inclined bottom surface of the prefabricated cantilever beam 3 is cantilevered, the railing 7 is bolted to the prefabricated cantilever beam 2, and then the anchor bars 17 are used to anchor the cement paving layer 3 on the side close to the prefabricated cantilever beam 2. After the anchor bars are anchored, the anchor bars 17 are tied to the prefabricated cantilever beam 2 with the torsion-resistant steel bars 18 embedded inside and extending outside. After the tying is completed, the base 1 is erected with a mold erecting tool, and then two U-shaped anchor bolts 9 are inserted into the four first bolt holes 8 embedded in the lower flange, and then the base 1 is formed by pouring concrete. Both ends of the two U-shaped anchor bolts 9 are exposed from the top surface of the base 1. In the next step, the top surface of the upper flange is welded to the bottom surface of the column 6, and the four first bolt holes 8 of the upper flange are inserted into the two ends of the two U-shaped anchor bolts 9, and then tightened with nuts 10. When installing the steel pipe on the column 6, the first steel pipe 12 is first spot-welded to the column 6, and then the second steel pipe 13 is connected to the column 6 using bolts 11. The first steel pipes 12 are fixedly connected by the third steel pipe 13, and the second steel pipes 12 are fixedly connected by the fourth steel pipe 15. The first steel pipe 12 and the third steel pipe 14 and the second steel pipe 13 and the fourth steel pipe 15 are all connected by spot welding.

[0030] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A structure for adding an anti-collision guardrail to an existing bridge sidewalk, characterized in that: The invention comprises a base (1), a prefabricated cantilever beam (2), a cement paving layer (3), a guardrail and a handrail (7), wherein the base (1) is located on the cement paving layer (3) on the top surface of an existing bridge, the base (1) is fixed on the cement paving layer (3), the prefabricated cantilever beam (2) is cantilevered on the cement paving layer (3), the prefabricated cantilever beam (2) is located outside the base (1), the prefabricated cantilever beam (2) is fixedly connected to the base (1), the guardrail is fixed on the base (1), and the handrail (7) is arranged on a side of the upper surface of the prefabricated cantilever beam (2) away from the guardrail.

2. The structure for adding an anti-collision guardrail to an existing bridge sidewalk according to claim 1, characterized in that: The guardrail comprises a column (6), on which a first steel pipe (12), a second steel pipe (13), a third steel pipe (14) and a fourth steel pipe (15) are arranged in a horizontal direction, the first steel pipe (12) is parallel to the top of the second steel pipe (13), the first steel pipes (12) are fixedly connected by the third steel pipe (14), the second steel pipes (13) are fixedly connected by the fourth steel pipe (15), and the outer diameters of the third steel pipe (14) and the fourth steel pipe (15) are respectively smaller than those of the first steel pipe (12) and the second steel pipe (13).

3. The structure for adding an anti-collision guardrail to an existing bridge sidewalk according to claim 2 is characterized in that: The first steel pipe (12) and the column (6) are connected by spot welding, the second steel pipe (13) and the column (6) are bolted, and the first steel pipe (12) and the third steel pipe (14) and the second steel pipe (13) and the fourth steel pipe (15) are all connected by spot welding.

4. The structure for adding an anti-collision guardrail to an existing bridge sidewalk according to claim 3 is characterized in that: The base (1) is pre-buried with U-shaped anchor bolts (9) and embedded steel bars (17), and the prefabricated cantilever beam (2) is pre-buried with torsion-resistant steel bars (18): one end of the torsion-resistant steel bars (18) close to the base (1) extends outward to the inside of the base (1) and is tied and connected to the embedded steel bars (17); the base (1) is fixedly connected to the cement paving layer (3) by means of embedded steel bars casting.

5. The structure for adding an anti-collision guardrail to an existing bridge sidewalk according to claim 4 is characterized in that: Two U-shaped anchor bolts (9) are provided, and a flange (5) is provided on the base (1). The flange (5) is fixedly connected to the base (1) via the U-shaped anchor bolts (9).

6. The structure for adding an anti-collision guardrail to an existing bridge sidewalk according to claim 5, characterized in that: The four corners of the flange (5) are provided with first bolt holes (8), and the first bolt holes (8) at the four corners of the flange (5) correspond one to one with the two ends of two U-shaped anchor bolts (9).

7. The structure for adding an anti-collision guardrail to an existing bridge sidewalk according to claim 6, characterized in that: The flange (5) comprises an upper flange and a lower flange, the upper flange is arranged on the lower flange, the column (6) is located on the upper flange and is welded to the upper flange, the lower flange is pre-buried in the upper surface of the base (1), and the upper flange is fixedly connected to the lower flange via the U-shaped anchor bolts (9).

8. The structure for adding an anti-collision guardrail to an existing bridge sidewalk according to claim 7, characterized in that: A paint for sealing the gap between the U-shaped anchor bolt (9) and the flange (5) is provided between the U-shaped anchor bolt (9) and the flange (5).

9. The structure for adding an anti-collision guardrail to an existing bridge sidewalk according to claim 1, characterized in that: The bottom surface of the prefabricated cantilever beam (2) comprises a flat bottom surface and an inclined bottom surface which are connected to each other. The flat bottom surface of the prefabricated cantilever beam (2) is close to the base (1) and is arranged on the cement paving layer (3), and the inclined bottom surface is cantilevered.

10. The structure for adding an anti-collision guardrail to an existing bridge sidewalk according to claim 9, characterized in that: A pedestrian crossing pavement layer (4) is arranged above the prefabricated cantilever beam (2), and the pedestrian crossing pavement layer (4) comprises a cushioning mortar layer, a prefabricated sidewalk slab, a mortar layer and sidewalk colored bricks laid in sequence from bottom to top, and the plane of the pedestrian crossing after laying is inclined from outside to inside.

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