Bridge floor drainage system of double-layer steel structure bridge

Abstract

According to the bridge floor drainage system of the double-layer steel structure bridge, the double-layer steel structure bridge comprises an upper-layer bridge floor and a lower-layer bridge floor, and the top face of each of the upper-layer bridge floor and the lower-layer bridge floor comprises a steel beam top plate and a pavement layer laid on the upper side of the steel beam top plate; the bridge floor drainage system comprises an upper-layer bridge floor drainage system and a lower-layer bridge floor drainage system which are respectively arranged on the upper-layer bridge floor and the lower-layer bridge floor; each of the upper-layer bridge floor drainage system and the lower-layer bridge floor drainage system comprises a steel box girder cantilever arm arranged on the outer side of the sidewalk guardrail, a plurality of drainage assemblies are arranged in the steel box girder cantilever arms at intervals in the bridge direction, and water flow collecting pipes connected with the drainage assemblies are fixedly mounted at the bottoms of the steel box girder cantilever arms; the water flow collecting pipe is arranged along the steel box girder cantilever arm, the steel truss and the pier and drains water flow into a ground drainage system along with the pier. The drainage device is beneficial to drainage of the double-layer steel structure bridge deck, good in drainage effect and convenient to maintain, the durability of the bridge deck is improved, and the safety risk caused by accumulated water on the bridge deck is greatly reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of bridge drainage equipment, in particular to a bridge deck drainage system for a double-layer steel structure bridge. Background Art

[0002] The main purpose of bridge deck drainage is to collect and drain sewage from regular rainfall, daily flushing of the bridge deck, and leakage and flushing of accident vehicles, so as to avoid directly discharging it into the water environment across the bridge to cause pollution. The bridge deck drainage system is an important part of the bridge's ancillary facilities and is an important factor directly related to driving safety and affecting the safety and durability of the bridge structure. The conventional bridge deck runoff collection and drainage system generally adopts a rainwater grate at the lowest point of the bridge deck cross slope, and a drainage pipe is set through the main structure of the bridge. The drainage pipe is connected to the longitudinal drainage pipe suspended at the bottom of the beam. The longitudinal drainage pipe mostly uses a PVC round pipe as the longitudinal runoff drainage pipe, and the bridge deck rainwater is discharged to the ground drainage system through the vertical downpipe at the pier.

[0003] The main problems of conventional bridge deck drainage collection systems are as follows: (1) The longitudinal drainage pipes are closed circular pipes, which are easily blocked by garbage, leaves, paper scraps, mud, stones and other debris during use, causing drainage difficulties and the risk of pipe blockage. It is very easy to cause water on the bridge surface, affecting driving safety. (2) The conventional bridge deck drainage collection system is an internal closed structure. Even if it is blocked, it is difficult to find the specific blockage location. It is also difficult to clean and dredge, which is not conducive to pipe maintenance. (3) For short-arm or fish-belly flat box girders, if the conventional bridge deck drainage collection system is still used, the drainage pipe connected to the bridge deck rainwater grate must pass through the main beam structure. The gap between the rainwater grate and the main beam body is prone to water leakage, which not only has an adverse effect on the durability of the main beam structure and the service life of the main structure of the bridge, but also makes it very inconvenient to repair and maintain the internal structure of the main beam. Utility Model Content

[0004] In response to the above-mentioned technical problems, the present technical solution provides a bridge deck drainage system for a double-deck steel structure bridge, in which the drainage system is arranged on the cantilever of the steel box girder on the outside of the sidewalk guardrail, thereby reducing the impact of the drainage system on the main beam structure of the bridge body; at the same time, an external water collection pipe is adopted, which can be easily repaired when the water pipe is blocked, thereby effectively solving the above-mentioned problems.

[0005] The utility model is realized by the following technical solutions:

[0006] A bridge deck drainage system for a double-deck steel structure bridge, the double-deck steel structure bridge comprises an upper deck and a lower deck, the top surfaces of the upper deck and the lower deck both comprise a steel beam top plate, and a road surface layer laid on the upper side of the steel beam top plate; the bridge deck drainage system comprises an upper deck drainage system and a lower deck drainage system respectively arranged on the upper deck and the lower deck; the upper deck drainage system and the lower deck drainage system both comprise a steel box beam cantilever arranged on the outside of a sidewalk guardrail, a plurality of drainage assemblies are arranged in the steel box beam cantilever at intervals along the bridge direction, a water flow collecting pipe connected to the drainage assembly is fixedly installed at the bottom of the steel box beam cantilever, the water flow collecting pipe is arranged along the steel box beam cantilever, the steel truss and the bridge pier, and the water flow is discharged into the ground drainage system along the bridge pier.

[0007] Furthermore, the cantilever arm of the steel box girder includes a top plate flush with the top plate of the steel girder, and a bottom plate fixed on the lower side of the top plate; a road surface drainage outlet and a bottom plate opening are respectively provided on the top plate and the bottom plate at positions corresponding to the drainage components, and the bottom of the drainage component passes through the bottom plate opening and is connected to the water collection pipe.

[0008] Furthermore, the water flow collecting pipe is fixedly installed on the lower side of the bottom plate through a support frame and exposed on the lower side of the cantilever arm of the steel box beam.

[0009] Furthermore, the support frame adopts a "U" bracket, and the top of the "U" bracket is provided with a connecting block extending outward and integrally formed with the main body. After the water collection pipe is placed in the groove of the "U" bracket, the connecting blocks on both sides of the "U" bracket are fixed to the lower side of the bottom plate of the steel box girder cantilever by fasteners.

[0010] Furthermore, the water collection pipe is a circular PVC plastic pipe.

[0011] Furthermore, the drainage assembly includes a vertical drain pipe arranged between the top plate and the bottom plate of the steel box girder cantilever, the top of the vertical drain pipe is fixed to the bottom surface of the top plate at the road surface drainage outlet, and the bottom of the vertical drain pipe passes through the bottom plate opening and is fixedly connected to the water collection pipe.

[0012] Furthermore, the drainage assembly also includes a pad arranged on the upper side of the top plate at the road surface drainage outlet, and a rainwater grate is fixed on the upper side of the pad.

[0013] Furthermore, the top surface of the rain grate is flush with or lower than the top surface of the pavement layer. Beneficial Effects

[0014] The bridge deck drainage system of a double-layer steel structure bridge proposed in the utility model has the following beneficial effects compared with the prior art:

[0015] The utility model adds steel box girder cantilevers on both sides of the main beam structure of the bridge body. The steel box girder cantilever arms are independently connected to the support seats, and the drainage system is arranged on the steel box girder cantilever arms outside the sidewalk guardrail, thereby reducing the influence of the drainage system on the main beam structure of the bridge body. At the same time, an external water collection pipe is adopted, which can be easily repaired when the water pipe is blocked. It is beneficial to the drainage of the bridge deck of the double-layer steel structure bridge, which not only has a good drainage effect, but also is convenient for maintenance, improves the durability of the bridge deck, and greatly reduces the safety risks caused by water on the bridge surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a diagram of the overall layout of the utility model.

[0017] Figure 2 for Figure 1 Schematic diagram of AA.

[0018] Figure 3 for Figure 2 Enlarged schematic diagram of part A.

[0019] Figure 4 A side view of the support frame.

[0020] Figure 5 A top view of the support frame.

[0021] Figure 6 Schematic diagram of the drainage component.

[0022] Figure 7 for Figure 6 Schematic diagram of AA.

[0023] Figure 8 for Figure 6 Schematic diagram of BB.

[0024] Fig. 9 for Figure 6 An enlarged schematic diagram of the proofing 1 part.

[0025] Fig.10 for Figure 7 Schematic diagram of CC.

[0026] Fig.11 It is a schematic diagram of the structure of the outer frame.

[0027] Fig.12 for Fig.11 Schematic diagram of DD.

[0028] Fig.13 This is a schematic diagram of the structure of a rain grate.

[0029] Fig.14 for Fig.13 Schematic diagram of EE.

[0030] Fig.15 It is a schematic diagram of the structure of the pad.

[0031] The numbers in the accompanying drawings are: 1-upper bridge deck, 2-lower bridge deck, 3-steel beam top plate, 4-pavement layer, 5-upper bridge deck drainage system, 6-lower bridge deck drainage system, 7-sidewalk guardrail, 8-steel box beam cantilever, 81-top plate, 82-bottom plate, 9-support assembly, 10-drainage assembly, 101-vertical drain pipe, 102-pad, 103-rainwater grate, 104-outer frame, 11-water collection pipe, 12-support frame, 121-through hole. DETAILED DESCRIPTION

[0032] 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. The described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Under the premise of not departing from the design concept of the utility model, various modifications and improvements made by ordinary people in this field to the technical solutions of the utility model should fall within the protection scope of the utility model. Example 1

[0033] like Figure 1 As shown, a bridge deck drainage system of a double-deck steel structure bridge, the double-deck steel structure bridge includes an upper bridge deck 1 and a lower bridge deck 2, the top surfaces of the upper bridge deck 1 and the lower bridge deck 2 both include a steel beam top plate 3, and a road surface layer 4 laid on the upper side of the steel beam top plate 3; the bridge deck drainage system includes an upper bridge deck drainage system 5 and a lower bridge deck drainage system 6 respectively arranged on the upper bridge deck 1 and the lower bridge deck 2.

[0034] like Figure 2 As shown, the upper deck drainage system 5 and the lower deck drainage system 6 both include a steel box girder cantilever 8 disposed outside the sidewalk guardrail 7, the steel box girder cantilever 8 including a top plate 81 flush with the steel girder top plate 3, and a bottom plate 82 fixed to the lower side of the top plate 81; the upper side of the steel box girder cantilever 8 and the upper side of the steel girder top plate 3 are paved with the same pavement layer 4 to form an integral pavement, and the top surface of the pavement has a slope that is higher in the middle and slightly lower on both sides. The bottom inner side of the steel box girder cantilever 8 is fixed to the support assembly 9, which does not affect the main beam structure of the bridge.

[0035] Combination Figure 1 and Figure 2As shown, a plurality of drainage components 10 are arranged at intervals in the steel box girder cantilever 8 along the bridge direction, and the top plate and bottom plate of the steel box girder cantilever 8 are respectively provided with road drainage ports and bottom plate openings at positions corresponding to the drainage components 10; a water flow collection pipe 11 connected to the drainage component 10 is fixedly installed at the bottom of the steel box girder cantilever 8, and the bottom of the drainage component 10 passes through the bottom plate opening and is connected to the water flow collection pipe 11. The water flow collection pipe 11 is arranged along the steel box girder cantilever 8, the steel truss and the bridge piers, and discharges the water flow into the ground drainage system along the bridge piers.

[0036] like Figure 3 As shown, the water collection pipe 11 is a circular PVC plastic pipe, which is fixedly installed on the lower side of the bottom plate 82 through a support frame 9 and exposed on the lower side of the steel box beam cantilever 8.

[0037] like Figure 4 and Figure 5 As shown, the support frame 12 adopts a "U" bracket, and the top of the "U" bracket is provided with a connecting block extending outward and integrally formed with the main body. After the water collection pipe 11 is placed in the groove of the "U" bracket, the connecting blocks on both sides of the "U" bracket are fixed to the lower side of the bottom plate of the steel box girder cantilever arm through expansion bolts.

[0038] like Figure 6 As shown, the drainage assembly 10 includes a vertical drain pipe 101 arranged between the top plate 81 and the bottom plate 82 of the steel box girder cantilever 8. The top of the vertical drain pipe 101 is welded and fixed to the bottom surface of the top plate 81 at the road surface drainage outlet. The bottom of the vertical drain pipe 101 passes through the opening of the bottom plate 82 and is fixedly connected to the water collection pipe 11. The joint needs to be sealed.

[0039] like Figure 7 As shown, the drainage assembly 10 also includes a pad 102 arranged at the road surface drainage outlet on the upper side of the top plate 81, and a rainwater grate 103 is fixed on the upper side of the pad 102, and the top surface of the rainwater grate 103 is flush with the top surface of the road surface layer 4 or lower than the top surface of the road surface layer 4 (see Figure 6 ). The outer side of the rain grate 103 is as follows Figure 8 A gap is provided between the outer frame 104 and the rainwater grate 103, and a bottom of the outer edge of the rainwater grate 103 is provided with a Fig. 9 The chamfer shown facilitates the opening and closing of the rain grate 103 during maintenance.

[0040] The structures of the rainwater grate 103 and the outer frame 104 adopt conventional structures, such as Figures 10 to 15 In addition, in order to prevent leaves and other debris from entering the water pipe, a filter screen can be set on the lower side of the rainwater grate, which is a conventional setting and is not shown in the attached figure.

[0041] The above implementation is only for illustrating the technical concept and features of the utility model, and its purpose is to enable people familiar with the technology to understand the content of the utility model and implement it accordingly, and it cannot be used to limit the protection scope of the utility model. Any equivalent transformation or modification made according to the spirit of the utility model should be included in the utility model.

Claims

1. A deck drainage system for a double-deck steel structure bridge, the double-deck steel structure bridge comprising an upper deck (1) and a lower deck (2), the top surfaces of the upper deck (1) and the lower deck (2) both comprising a steel beam top plate (3), and a road surface layer (4) laid on the upper side of the steel beam top plate (3); characterized in that: The bridge deck drainage system comprises an upper deck drainage system (5) and a lower deck drainage system (6) respectively arranged on the upper deck (1) and the lower deck (2); the upper deck drainage system (5) and the lower deck drainage system (6) both comprise a steel box girder cantilever (8) arranged outside the sidewalk guardrail (7); a plurality of drainage components (10) are arranged at intervals in the steel box girder cantilever (8) along the bridge direction; a water flow collection pipe (11) connected to the drainage component (10) is fixedly installed at the bottom of the steel box girder cantilever (8); the water flow collection pipe (11) is arranged along the steel box girder cantilever (8), the steel truss and the bridge pier, and discharges water into the ground drainage system along the bridge pier.

2. The deck drainage system of a double-deck steel structure bridge according to claim 1 is characterized in that: The steel box girder cantilever (8) comprises a top plate (81) flush with the steel girder top plate (3), and a bottom plate (82) fixed to the lower side of the top plate (81); a road surface drainage outlet and a bottom plate opening are respectively provided on the top plate (81) and the bottom plate (82) at positions corresponding to the drainage component (10); the bottom of the drainage component (10) passes through the bottom plate opening and is connected to the water flow collection pipe (11).

3. The deck drainage system of a double-deck steel structure bridge according to claim 2 is characterized in that: The water flow collecting pipe (11) is fixedly mounted on the lower side of the bottom plate (82) via a supporting frame (12) and is exposed on the lower side of the cantilever arm (8) of the steel box beam.

4. The deck drainage system of a double-deck steel structure bridge according to claim 3 is characterized by: The support frame (12) is a "U" bracket, and a connecting block extending outward and integrally formed with the main body is provided at the top of the "U" bracket. After the water flow collection pipe (11) is placed in the groove of the "U" bracket, the connecting blocks on both sides of the "U" bracket are fixed to the lower side of the bottom plate (82) of the steel box beam cantilever arm (8) by fasteners.

5. A deck drainage system for a double-deck steel structure bridge according to any one of claims 1 to 4, characterized in that: The water collection pipe (11) is a circular PVC plastic pipe.

6. The deck drainage system of a double-deck steel structure bridge according to claim 2 is characterized by: The drainage assembly (10) comprises a vertical drainage pipe (101) arranged between a top plate (81) and a bottom plate (82) of a steel box girder cantilever (8); the top of the vertical drainage pipe (101) is fixed to the bottom surface of the top plate (81) at a road surface drainage outlet; and the bottom of the vertical drainage pipe (101) passes through an opening of the bottom plate and is fixedly connected to a water flow collection pipe (11).

7. The deck drainage system of a double-deck steel structure bridge according to claim 2 is characterized by: The drainage assembly (10) further comprises a pad (102) arranged at the road surface drainage outlet and located on the upper side of the top plate (81), and a rainwater grate (103) is fixed on the upper side of the pad (102).

8. The deck drainage system of a double-deck steel structure bridge according to claim 7, characterized in that: The top surface of the rainwater grate (103) is flush with or lower than the top surface of the road surface layer (4).

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