Water-permeable pavement drainage system for bridge floor

Abstract

The utility model discloses a permeable pavement drainage system for a bridge floor, which comprises a pavement impervious layer, a pavement permeable layer, a longitudinal drainage blind ditch and a drainage pipeline, and the pavement impervious layer and the pavement permeable layer are sequentially paved on a bridge floor structure layer. The longitudinal drainage blind ditch is arranged between the pavement impervious layer and the pavement permeable layer, the longitudinal drainage blind ditch extends along the longitudinal center line of the bridge floor, the drainage pipeline is communicated with the longitudinal drainage blind ditch, and the drainage pipeline is arranged in a beam body, a bridge pier and a bearing platform and connected with a municipal rainwater pipe network. According to the utility model, the problem of ponding on the bridge floor can be obviously reduced, natural rainfall such as rainfall and ponding can be quickly dispersed and leaked into a drainage system, and traffic inconvenience and potential safety hazards caused by ponding are avoided; meanwhile, the longitudinal drainage blind ditches and the drainage pipelines are arranged in a hidden mode, and the overall attractiveness of the bridge is not affected.

Description

Technical Field

[0001] The utility model relates to the technical field of bridge drainage, and particularly relates to a drainage system for a permeable pavement on a bridge deck. Background Technique

[0002] Normally, permeable pavement cannot be used for bridges, especially steel structure bridges, so as to avoid the erosion of the bridge structure by rainwater. Therefore, conventional bridge deck drainage mostly adopts a combination of longitudinal and transverse slopes and a certain number of drain pipes to organize the discharge. However, the following problems often occur during use: 1. The dirt on the bridge deck is easy to block the drain pipes, resulting in poor drainage and water accumulation on the bridge deck, affecting driving and the safety of the bridge structure; 2. The elevation of a single drain hole is relatively high, the setting position is unreasonable, it is not located at the lowest point of discharge or the number is insufficient, resulting in poor drainage of the bridge deck; 3. The exposed rainwater pipes are not coordinated with the urban style, and there is a risk of falling after long-term use and aging, endangering the safety under the bridge. Content of the Utility Model

[0003] The purpose of the utility model is to provide a drainage system for a permeable pavement on a bridge deck aiming at the above deficiencies of the current bridge drainage system, which can significantly reduce the water accumulation on the road surface, avoid the traffic inconvenience and potential safety hazards caused by water accumulation, and at the same time, the drainage pipeline is hidden, so it will not affect the overall beauty of the bridge.

[0004] The utility model is realized by the following technical solutions:

[0005] The utility model provides a drainage system for a permeable pavement on a bridge deck, which includes an impermeable layer of the pavement, a permeable layer of the pavement, a longitudinal drainage blind ditch and a drainage pipeline. The impermeable layer of the pavement and the permeable layer of the pavement are sequentially paved on the bridge deck structure layer. The longitudinal drainage blind ditch is arranged between the impermeable layer of the pavement and the permeable layer of the pavement and extends along the longitudinal center line of the bridge deck. The drainage pipeline is communicated with the longitudinal drainage blind ditch and is arranged inside the beam body, pier and abutment cap and is connected to the municipal rainwater pipe network.

[0006] As a preferred scheme of the utility model, the upper surface of the impermeable layer of the pavement has a cross slope, and the side close to the longitudinal center line of the bridge deck is at a lower level.

[0007] As a preferred scheme of the utility model, the longitudinal drainage blind ditch is arranged along the longitudinal slope of the bridge deck, and the drainage pipeline is connected to the lowest point of the longitudinal drainage blind ditch.

[0008] As a preferred scheme of the utility model, the drainage pipeline includes a drain pipe in the beam and a drain pipe in the pier. The drain pipe in the beam extends from the longitudinal drainage blind ditch to the lower end of the beam body. The drain pipe in the pier extends from the top of the pier cap along the pier to the inside of the abutment cap, and the end of the drain pipe in the pier is connected to the municipal rainwater pipe network. The drain pipe in the beam and the drain pipe in the pier are communicated through a flexible joint.

[0009] As a preferred embodiment of the present utility model, a rainwater bucket is provided at the inlet end of the drain pipe in the beam, and the rainwater bucket is located at the bottom of the longitudinal drainage blind ditch.

[0010] As a preferred embodiment of the present utility model, the impervious paving layer is an epoxy resin asphalt paving layer.

[0011] As a preferred embodiment of the present utility model, the permeable paving layer is a permeable asphalt concrete paving layer.

[0012] As a preferred embodiment of the present utility model, the longitudinal drainage blind ditch is a permeable asphalt concrete blind ditch.

[0013] As a preferred embodiment of the present utility model, a trapezoidal groove with a larger upper part and a smaller lower part is arranged along the longitudinal center line of the bridge deck on the bridge deck structural layer.

[0014] As a preferred embodiment of the present utility model, the porosity of the permeable paving layer is ≥ 30%, and the porosity of the longitudinal drainage blind ditch is ≥ 40%.

[0015] Compared with the prior art, the present utility model has the following advantages and beneficial effects:

[0016] 1. The bridge deck permeable paving drainage system in the present utility model can significantly reduce the problem of bridge deck waterlogging, quickly disperse and seep natural precipitation such as rainfall and accumulated water into the drainage system, avoiding traffic inconvenience and potential safety hazards caused by waterlogging; at the same time, since a longitudinal drainage blind ditch is provided between the impervious paving layer and the permeable paving layer, and drainage pipelines are arranged in the beam body, pier and bearing platform, the entire drainage system is relatively concealed, so it will not affect the overall aesthetics of the bridge.

[0017] 2. The bridge deck drainage system in the present utility model can make the permeable paving effects of the sidewalks connected to both sides of the bridge in pedestrian landscape bridges and overpasses unified; at the same time, through the blind ditch formed by large-scale structure trenching, the drainage volume is large, and additional permeable components etc. do not need to be set separately, the system is simple, facilitating construction and subsequent maintenance; since the bridge deck drainage cross slope is formed by the bridge deck structure and the impervious layer, the permeable surface layer paving can be a flat slope, which is comfortable to use on pedestrian bridges and has a good landscape effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the exemplary embodiments of the present utility model, the following will briefly introduce the drawings required for use in the embodiments. It should be understood that the following drawings only show some embodiments of the present utility model, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can also be obtained based on these drawings without creative efforts. In the drawings:

[0019] Figure 1 Cross-sectional view of the permeable pavement drainage system for the standard section bridge deck in the present utility model;

[0020] Figure 2 Cross-sectional view of the permeable pavement drainage system at the pier drain hole in the present utility model;

[0021] Figure 3 Large-scale drawing of the longitudinal drainage blind ditch in the present utility model;

[0022] Figure 4 Plan view of the rainwater inlet in the present utility model.

[0023] Markings in the drawings and corresponding component names:

[0024] 1 - Impermeable pavement layer, 2 - Permeable pavement layer, 3 - Longitudinal drainage blind ditch, 4 - Bridge deck structural layer, 51 - Drain pipe in the beam, 52 - Drain pipe in the pier, 53 - Flexible joint, 54 - Rainwater inlet, 6 - Beam body, 7 - Pier, 8 - Raft foundation. Specific implementation manners

[0025] To make the objectives, technical solutions and advantages of the present utility model clearer and more understandable, the present utility model will be further described in detail below in combination with embodiments and the drawings. The illustrative implementation manners and descriptions of the present utility model are only used to explain the present utility model and do not limit the present utility model.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the description of the specification and claims of this application and the above drawings are intended to cover non-exclusive inclusion.

[0027] In the description of the embodiments of this application, technical terms such as "first" and "second" are only used to distinguish different objects and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity, specific order or primary-secondary relationship of the indicated technical features.

[0028] Referring to "embodiments" herein means that specific features, structures or characteristics described in combination with the embodiments can be included in at least one embodiment of this application. The phrase appears in various positions in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0029] In the description of the embodiments of the present application, the term "and / or" is merely a description of the relationship between associated objects, indicating that there can be three relationships. For example, A and / or B can mean: there is A, there is both A and B, and there is B, these three situations. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0030] In the embodiments of the present application, the same reference numerals denote the same components, and for the sake of brevity, in different embodiments, the detailed description of the same components is omitted. It should be understood that the thickness, length, width, etc. of various components in the embodiments of the present application shown in the drawings, as well as the overall thickness, length, width, etc. of the integrated device, are only for illustrative purposes and should not constitute any limitation to the present application.

[0031] In the description of the embodiments of the present application, the term "plural" means two or more (including two). Similarly, "multiple groups" means two or more groups (including two groups), and "multiple pieces" means two or more pieces (including two pieces), unless otherwise specifically defined.

[0032] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the embodiments of the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation to the embodiments of the present application.

[0033] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installation", "connection", "connection", "fixation", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can also be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0034] Please refer to Figures 1 to 4, a bridge deck permeable pavement drainage system provided in the embodiments of the present application includes an impermeable pavement layer 1, a permeable pavement layer 2, a longitudinal drainage blind ditch 3 and a drainage pipeline. The impermeable pavement layer 1 and the permeable pavement layer 2 are sequentially paved on the bridge deck structural layer 4. The longitudinal drainage blind ditch 3 is arranged between the impermeable pavement layer 1 and the permeable pavement layer 2 and extends along the longitudinal center line of the bridge deck. The drainage pipeline is communicated with the longitudinal drainage blind ditch 3 and is arranged inside the beam body 6, the pier 7 and the bearing platform 8 and is connected to the municipal rainwater pipe network.

[0035] In this embodiment, the impermeable pavement layer 1 is directly laid on the bridge deck structural layer 4, which can effectively prevent rainwater from seeping into the lower bridge deck structural layer 4, thereby avoiding the erosion of the bridge steel structure by rainwater. The permeable pavement layer 2 is directly laid on the upper surface of the impermeable pavement layer 1. The longitudinal drainage blind ditch 3 is arranged between the impermeable pavement layer 1 and the permeable pavement layer 2. After rainwater permeates through the permeable pavement layer 2, it can be collected in the longitudinal drainage blind ditch 3 and then discharged into the municipal rainwater pipe network through the drainage pipeline.

[0036] The bridge deck permeable pavement drainage system in this embodiment can quickly disperse and leak natural precipitation such as rainfall and ponding into the drainage system. This characteristic enables the permeable pavement to significantly reduce the ponding on the bridge deck, avoiding traffic inconvenience and potential safety hazards caused by ponding. At the same time, since the longitudinal drainage blind ditch 3 is arranged between the impermeable pavement layer 1 and the permeable pavement layer 2 and the drainage pipeline is arranged inside the beam body 6, the pier 7 and the bearing platform 8, the entire drainage system is relatively concealed, making the overall aesthetics of the bridge better.

[0037] In the bridge deck permeable pavement drainage system of this embodiment, the permeable pavement layer 2 and the longitudinal drainage blind ditch 3 are the keys to realizing permeable drainage. It is paved with permeable materials, which can maintain the smoothness of the bridge deck drainage. Even in rainy and windy seasons, it can effectively prevent the occurrence of ponding and water damage on the bridge deck, thereby avoiding the adverse effects on the bridge structure.

[0038] The bridge deck permeable pavement drainage system in this embodiment can reasonably conceal the drainage pipeline. There is no longitudinal drainage pipe (beautiful, easy to maintain and no risk of falling). The vertical drainage pipes are hidden inside the beam body 6, the pier 7 and the bearing platform 8, and the urban landscape is good. At the same time, it can make the permeable pavement effect of the pedestrian landscape bridge and the overpass unified with the sidewalks on both sides of the bridge. Therefore, the advantages of the bridge deck permeable pavement drainage system are mainly reflected in its rapid drainage, maintaining smooth ground drainage, effectively managing runoff, achieving efficient drainage through the hierarchical structure and aesthetics.

[0039] According to some embodiments of the present application, the upper surface of the impermeable paving layer 1 has a cross slope, and the side closer to the longitudinal center line of the bridge deck is at a lower level. Preferably, taking the longitudinal center line of the bridge deck as the boundary, both the left and right parts of the impermeable paving layer 1 have a cross slope. By setting the cross slope, rainwater can flow along the slope surface to the longitudinal drainage blind ditch 3.

[0040] According to some embodiments of the present application, the longitudinal drainage blind ditch 3 is arranged along the longitudinal slope of the bridge deck, and the drainage pipeline is connected to the lowest point of the longitudinal drainage blind ditch 3.

[0041] When the rainwater on the bridge deck reaches the permeable paving layer 2, it can quickly converge to the longitudinal drainage blind ditch 3 through the cross slope, and then enter the drainage pipeline at the lowest point of the longitudinal drainage blind ditch 3 through the longitudinal slope of the bridge deck, and be led to the municipal rainwater system outside the bridge, which can greatly reduce the pressure brought by rainwater runoff.

[0042] According to some embodiments of the present application, the drainage pipeline includes a drain pipe 51 in the beam and a drain pipe 52 in the pier. The drain pipe 51 in the beam extends downward from the longitudinal drainage blind ditch 3 to the lower end of the beam body 6. The drain pipe 52 in the pier extends along the pier 7 from the top of the pier capping beam to the inside of the bearing platform 8, and the end of the drain pipe 52 in the pier is led out from the bearing platform 8 and connected to the municipal rainwater pipe network. The drain pipe 51 in the beam and the drain pipe 52 in the pier are connected through a flexible joint 53.

[0043] Specifically, both the drain pipe 51 in the beam and the drain pipe 52 in the pier are made of stainless steel drain pipes. The drain pipe 51 in the beam is welded around the opening of the steel beam body 6 and penetrates to the bottom of the beam body 6, and is connected to the upper end of the drain pipe 52 in the pier through a flexible joint 53, which can adapt to the longitudinal and transverse displacements of the bridge. After being connected, the rainwater is discharged from the end of the drain pipe 52 in the pier to the municipal rainwater pipe network.

[0044] According to some embodiments of the present application, a rainwater funnel 54 is provided at the inlet end of the drain pipe 51 in the beam, and the rainwater funnel 54 is located at the bottom of the longitudinal drainage blind ditch 3. The rainwater funnel 54 can be a stainless steel rainwater funnel with a diversion cover.

[0045] According to some embodiments of the present application, the impermeable paving layer 1 is an epoxy asphalt paving layer, the permeable paving layer 2 is a permeable asphalt concrete paving layer, and the longitudinal drainage blind ditch 3 is a permeable asphalt concrete blind ditch.

[0046] The bridge deck surface paving uses permeable asphalt concrete, and the lower layer is an impermeable dense structure such as epoxy asphalt, and can be well combined with the beam body structure. Rainwater can quickly infiltrate into the lower layer paving through the surface paving, and is collected in the longitudinal drainage blind ditch 3 in the structural notch through the cross slope of the lower layer paving.

[0047] According to some embodiments of the present application, a trapezoidal groove that is larger at the top and smaller at the bottom is provided on the bridge deck structure layer 4 along the longitudinal center line of the bridge deck. During construction, the paving impermeable layer 1 is laid along the surface of the trapezoidal groove. After paving, a trapezoidal groove that is larger at the top and smaller at the bottom is formed at the longitudinal center line of the bridge deck. After the permeable asphalt concrete is filled in the trapezoidal groove, a longitudinal drainage blind ditch 3 is formed. It can be seen that the longitudinal drainage blind ditch is actually formed by the concave beam structure, which can reduce the paving thickness. The structural structure of the longitudinal drainage blind ditch includes but is not limited to steel structure bridges (also applicable to concrete bridges). The blind ditch formed by large grooving of the bridge deck structure has a large drainage capacity and does not require additional permeable components. The system is simple and convenient for construction and later maintenance.

[0048] According to some embodiments of the present application, the porosity of the paving permeable layer 2 is ≥30%, and the porosity of the longitudinal drainage blind ditch 3 is ≥40%. By controlling the porosity of the paving permeable layer 2 and the longitudinal drainage blind ditch 3, it can be ensured that rainwater can flow into the longitudinal drainage blind ditch 3 after passing through the paving permeable layer 2. Since there is a paving impermeable layer 1 between the bridge deck structure layer 4 and the paving permeable layer 2, it can play a better protective role on the bridge steel structure.

[0049] This bridge deck permeable pavement drainage system can significantly reduce the problem of waterlogging on the bridge surface, and can quickly disperse and infiltrate natural precipitation such as rain and water accumulation into the drainage system, avoiding traffic inconvenience and safety hazards caused by water accumulation. This bridge deck drainage system forms a longitudinal blind ditch to collect drainage through structural construction measures, making the city beautiful and the drainage system easy to maintain. This bridge deck drainage system can make the permeable pavement effect of the sidewalks connected to both sides of the bridge in pedestrian landscape bridges and overpasses uniform. The water collection cross slope is adjusted through the structure and the lower layer of the pavement, and the surface pavement is horizontally level, with a good landscape effect. The blind ditch formed by the large structural slot has a large drainage capacity and does not require additional permeable components. The system is simple and easy to construct and maintain in the later stage.

[0050] The specific implementation methods described above further illustrate the purpose, technical solutions and beneficial effects of the utility model in detail. It should be understood that the above description is only the specific implementation method of the utility model and is not used to limit the protection scope of the utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the utility model should be included in the protection scope of the utility model.

Claims

1. A drainage system for a permeable bridge deck pavement, characterized in that, It includes an impervious paving layer, a permeable paving layer, a longitudinal drainage blind ditch and a drainage pipeline. The impervious paving layer and the permeable paving layer are sequentially paved on the bridge deck structural layer. The longitudinal drainage blind ditch is arranged between the impervious paving layer and the permeable paving layer and extends along the longitudinal center line of the bridge deck. The drainage pipeline is communicated with the longitudinal drainage blind ditch and is arranged inside the beam body, pier and abutment and is connected to the municipal rainwater pipe network.

2. The bridge deck permeable pavement drainage system according to claim 1, characterized in that, The upper surface of the impervious paving layer has a cross slope, and the side close to the longitudinal center line of the bridge deck is at a lower level.

3. The bridge deck permeable pavement drainage system according to claim 2, characterized in that The longitudinal drainage blind ditch is arranged along the longitudinal slope of the bridge deck, and the drainage pipeline is connected to the lowest point of the longitudinal drainage blind ditch.

4. The bridge deck permeable pavement drainage system according to any one of claims 1-3, characterized in that The drainage pipeline includes an in-beam drain pipe and an in-pier drain pipe. The in-beam drain pipe extends from the longitudinal drainage blind ditch to the lower end of the beam body. The in-pier drain pipe extends from the top of the pier cap along the pier to the inside of the abutment, and the end of the in-pier drain pipe is connected to the municipal rainwater pipe network. The in-beam drain pipe and the in-pier drain pipe are communicated through a flexible joint.

5. The bridge deck permeable pavement drainage system according to claim 4, characterized in that, A rainwater hopper is arranged at the inlet end of the in-beam drain pipe, and the rainwater hopper is located at the bottom of the longitudinal drainage blind ditch.

6. The bridge deck permeable pavement drainage system according to any one of claims 1-3, characterized in that, The impervious paving layer is an epoxy asphalt paving layer.

7. The deck permeable pavement drainage system according to any one of claims 1 to 3, characterized in that The permeable paving layer is a permeable asphalt concrete paving layer.

8. The bridge deck permeable pavement drainage system according to any one of claims 1-3, characterized in that, The longitudinal drainage blind ditch is a permeable asphalt concrete blind ditch.

9. The bridge deck permeable pavement drainage system according to any one of claims 1-3, characterized in that, A trapezoidal groove with a larger upper part and a smaller lower part is arranged along the longitudinal center line of the bridge deck on the bridge deck structural layer.

10. The bridge deck permeable pavement drainage system according to any one of claims 1-3, characterized in that, The porosity of the permeable paving layer is ≥30%, and the porosity of the longitudinal drainage blind ditch is ≥40%.

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