Bridge floor drainage structure and bridge

Abstract

The utility model relates to the technical field of bridge engineering, in particular to a bridge floor drainage structure and a bridge, which comprises a bridge deck and a drainage component, the bridge deck is provided with a roadway area and a sidewalk area, and the pavement of the roadway area is provided with a bridge floor cross slope and a bridge floor longitudinal slope; the drainage assembly comprises a drainage channel, drainage grooves and drainage pipes, the drainage channel is located below the pavement of the sidewalk area, the two ends of the drainage channel communicate with the roadway area and the drainage grooves correspondingly, the drainage grooves are located in the two transverse sides of the bridge deck slab, gutter inlets are formed in the drainage grooves, the water inlet ends of the drainage pipes are connected with the gutter inlets, and the water outlet ends of the drainage pipes are connected into a municipal pipe network. According to the bridge deck drainage structure, the drainage system is convenient to arrange, the drainage efficiency is high, rainwater on the bridge deck can be rapidly drained out of the roadway area, accumulated water and runoff of the bridge deck are reduced, and the traffic safety of the roadway area is guaranteed; rainwater is collected in a closed-loop mode and finally converged into a municipal pipe network, corrosive substances are prevented from influencing a bridge structure and damaging the environment, and the service life of a bridge is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of bridge engineering, in particular to a bridge deck drainage structure and a bridge. Background Art

[0002] In recent years, my country's urban rail transit industry has developed rapidly, driving the construction of a large number of highway bridges and urban viaducts. These bridge structures need to face the outdoor environment for a long time and will inevitably be affected by complex external conditions such as rainfall and floods. Therefore, the bridge drainage structure has become a crucial part of the design. Good drainage capacity is not only related to the normal operation of the transportation hub, but also directly affects the service life of the bridge structure.

[0003] Early designers did not pay enough attention to the design of bridge deck drainage system facilities, resulting in the bridge deck space being relatively closed when it rains. Once the drainage system fails or the rainfall is too heavy, it is very easy to cause water accumulation, seepage, leakage, etc. on the bridge, which seriously hinders traffic and threatens the safety of vehicles and pedestrians.

[0004] In addition, the runoff from the bridge surface brought by rainfall contains a certain amount of pollutants such as organic matter, acid salts, and heavy metals, which may cause corrosion and rust of the bridge surface structure, seriously affecting the safety and durability of the bridge structure. Therefore, it is particularly important to strengthen the design and maintenance of the bridge drainage system to ensure smooth urban transportation and long-term stability of the bridge structure.

[0005] The current bridge deck drainage facilities mainly adopt the direct discharge method of connecting the water inlet to the drainage channel or the lateral drainage method. The direct discharge method of connecting the water inlet to the drainage channel is common in urban elevated bridges, especially when there are no pedestrians and vehicles passing under the bridge. In this method, rainwater on the bridge deck gathers along the transverse and longitudinal slopes under the action of gravity, and finally flows to the drainage holes, and is directly discharged to the bottom of the bridge through the drainage channel connected to the water inlet; the lateral drainage method is more used in small-span bridges. Its design is simple. Horizontal channels can be reserved on the curbs on both sides of the carriageway, and then the water on the bridge surface can be discharged horizontally outside the bridge through iron pipes and other pipelines.

[0006] The existing bridge deck drainage facilities currently have the following main disadvantages:

[0007] First, rainwater on the bridge deck cannot be quickly collected and discharged from the carriageway area, which may cause water accumulation in the carriageway area, affecting driving safety.

[0008] Second, the rainwater collected on the bridge deck may contain corrosive substances. If discharged directly, it may cause corrosion to the bridge beams and substructures, and continuously wash the ground under the bridge, causing adverse effects on the environment under the bridge. Utility Model Content

[0009] The invention purpose of the utility model is to provide a bridge deck drainage structure and a bridge in view of the problems in the prior art that water on the bridge surface affects driving safety and corrosive substances damage the bridge and the environment.

[0010] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0011] A bridge deck drainage structure comprises a bridge deck and a drainage assembly, wherein the bridge deck comprises a carriageway area and pedestrian areas located on both lateral sides of the carriageway area; the road surface of the carriageway area comprises a bridge deck transverse slope which slopes downward from the center to both sides, and a bridge deck longitudinal slope which is inclined along the direction of the bridge; the drainage assembly comprises a drainage channel, a drainage trough and a drainage pipe; the drainage channel is connected with the part of the bridge deck close to the outside of the carriageway area at its upstream, and is connected with the drainage trough at its downstream, and the drainage channel is located below the road surface of the pedestrian area; the drainage trough is located on both lateral sides of the bridge deck, the drainage trough is extended along the direction of the bridge, and a rainwater outlet is opened in the drainage trough; the water inlet end of the drainage pipe is connected with the rainwater outlet, and the water outlet end of the drainage pipe is connected to the municipal pipe network.

[0012] The bridge deck drainage structure provided by the present application sets a transverse slope of the bridge deck in the carriageway area, which can quickly introduce rainwater into both sides of the carriageway area, and sets a longitudinal slope of the bridge deck so that rainwater on both sides of the carriageway area can flow along the direction of the bridge, so that rainwater is conveniently discharged from the carriageway area from the upstream opening of the drainage channel, thereby avoiding the formation of water accumulation in the carriageway area that affects driving safety; the downstream of the drainage channel is connected to the drainage trough, which can guide rainwater discharged from the carriageway area into the drainage trough. After the rainwater gathers in the drainage trough, it flows out of the bridge deck through the rainwater outlet set in the drainage trough, thereby preventing rainwater from backflowing into the carriageway area along the drainage channel; guiding the rainwater into the municipal pipeline network through the drainage pipe can prevent corrosive substances in the rainwater from eroding the bridge or washing the ground under the bridge, which is beneficial to maintaining the safety of the bridge structure and conforms to the concept of green environmental protection.

[0013] As a preferred solution of the utility model, the pedestrian walkway area has a pedestrian walkway structure, the pedestrian walkway structure is arranged on the bridge deck, and the drainage channel is arranged inside the pedestrian walkway structure.

[0014] A sidewalk structure is set on the bridge deck, and a drainage channel is set inside the sidewalk structure. There is no need to excavate the bridge deck, which facilitates the laying of the drainage channel and helps maintain the structural integrity of the bridge deck.

[0015] As a preferred solution of the utility model, the drainage channel includes a drainage pipe, which is arranged on an obstacle along the drainage channel, and the cross-sectional shape of the drainage pipe is square.

[0016] When the drainage channel encounters an obstacle, a hole can be opened on the obstacle and a drainage pipe can be placed in the hole. The drainage pipe can reduce the erosion of the obstacle by flowing water and maintain the safety of the bridge structure. The cross-section of the drainage pipe is chosen to be square, which is convenient for the opening of holes and the laying of the drainage pipe. The square drainage pipe has a high drainage capacity and is more in line with the bridge deck structure. It can reduce pipeline vibration and improve the safety and reliability of the drainage system.

[0017] As a preferred solution of the utility model, a water retaining weir is provided on the side of the drainage channel.

[0018] The top of the water retaining weir is higher than the bottom surface of the drainage channel, which can block the water from flowing along the bridge and help improve the water interception efficiency of the drainage pipe.

[0019] As a preferred solution of the utility model, the cross bridge of the rainwater outlet is provided with water collection slopes on both sides, and the water collection slopes can guide water flow into the rainwater outlet.

[0020] As a preferred solution of the utility model, grilles are provided at the upstream end of the drainage channel and the rainwater outlet.

[0021] The grille can prevent large solid objects such as gravel and waste from entering the drainage channel and drain pipe, making it easier to maintain and clean the drainage system.

[0022] As a preferred solution of the utility model, the diameter of the drain pipe is 18-22 cm.

[0023] As a preferred solution of the utility model, the drainage pipe includes a steel pipe section and a PVC pipe section, the steel pipe section is a steel pipe, and the PVC pipe section is a PVC pipe.

[0024] Steel pipes have better durability and structural strength. Setting steel pipe sections to connect with bridge structures can prevent the ends of drainage pipes from being damaged by load or deformation during operation. PVC pipes have lower costs and better durability, and can be used in locations that are not in direct contact with bridge structures.

[0025] As a preferred solution of the utility model, the drainage pipe is fixed by a self-anchoring pipe clamp, which is convenient to fix and has a stable connection.

[0026] The present application also provides a bridge, including a bridge deck and a supporting structure, and a bridge deck drainage structure as described above, wherein the supporting structure is a pier and / or abutment, and the drainage pipe is fixed to the supporting structure.

[0027] A bridge provided in the present application adopts a bridge deck drainage structure as described above, and the drainage system is easy to arrange, its safety and reliability are guaranteed, and the drainage efficiency is greatly improved. It can quickly discharge rainwater on the bridge deck to the carriageway area, reduce surface water and runoff on the bridge, and ensure driving safety in the carriageway area; collect rainwater in a closed loop and finally drain it into the municipal pipeline network, so as to prevent corrosive substances from affecting the bridge structure and damaging the environment, which is beneficial to improving the service life of the bridge.

[0028] In summary, due to the adoption of the above technical solution, the beneficial effects of the utility model are:

[0029] 1. The bridge deck drainage structure provided by the present application sets a transverse slope of the bridge deck in the carriageway area, which can quickly introduce rainwater into both sides of the carriageway area, and sets a longitudinal slope of the bridge deck so that rainwater on both sides of the carriageway area can flow along the direction of the bridge, so that rainwater can be discharged from the carriageway area from the upstream opening of the drainage channel, thereby avoiding the formation of water accumulation in the carriageway area and affecting driving safety; the downstream of the drainage channel is connected to the drainage trough, which can guide the rainwater discharged from the carriageway area into the drainage trough. After the rainwater gathers in the drainage trough, it flows out of the bridge deck through the rainwater outlet set in the drainage trough, thereby preventing rainwater from flowing back into the carriageway area along the drainage channel; guiding the rainwater into the municipal pipe network through the drainage pipe can prevent the corrosive substances in the rainwater from eroding the bridge or washing the ground under the bridge, which is beneficial to maintaining the safety of the bridge structure and conforms to the concept of green environmental protection.

[0030] 2. The bridge provided in the present application adopts a bridge deck drainage structure as described above, and the drainage system is easy to arrange, its safety and reliability are guaranteed, and the drainage efficiency is greatly improved. It can quickly discharge rainwater on the bridge deck to the carriageway area, reduce surface water and runoff on the bridge, and ensure driving safety in the carriageway area; collect rainwater in a closed loop and finally drain it into the municipal pipeline network, so as to avoid corrosive substances affecting the bridge structure and damaging the environment, which is beneficial to improving the service life of the bridge. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a structural schematic diagram of the bridge deck drainage structure of the utility model (cross-bridge section);

[0032] Figure 2 It is a forward schematic diagram of the drainage assembly of the utility model;

[0033] Figure 3 It is a top view schematic diagram of the drainage assembly of the utility model;

[0034] Figure 4 It is a structural schematic diagram of the drainage trough and rainwater outlet described in the utility model.

[0035] Markings in the figure: 10-bridge deck; 11-carriageway area; 12-sidewalk area; 20-sluice pipe; 21-water retaining weir; 22-grating; 30-drainage trough; 31-rain inlet; 32-water collection slope; 40-drainage pipe; 41-steel pipe section; 42-PVC pipe section; 43-self-anchored pipe clamp; 50-crash wall; 51-pad stone; 52-sidewalk slab. DETAILED DESCRIPTION

[0036] The present invention is further described in detail below in combination with test examples and specific implementation methods. However, this should not be understood as the scope of the above subject matter of the present invention being limited to the following embodiments, and all technologies realized based on the content of the present invention belong to the scope of the present invention.

[0037] In the description of the specific embodiments of the present invention, unless otherwise specified, the terms indicating the orientation or position relationship such as "upper", "lower", "left", "right", "center", "inside", "outside", etc. are all expressions based on the orientation or position relationship shown in the drawings, or the orientation or position relationship of the product / equipment / device of the utility model when it is usually used. These terms of orientation or position relationship are only for the convenience of describing the scheme of the utility model or simplifying the description in the specific embodiments, so that technicians can quickly understand the scheme, rather than indicating or implying that a specific device / component / element must have a specific orientation, or be constructed and operated in a specific position relationship, and therefore cannot be understood as a limitation on the present invention.

[0038] In addition, if the terms "horizontal", "vertical", "overhanging", "parallel" and the like appear, it does not mean that the corresponding devices / components / elements are required to be absolutely horizontal or vertical or overhanging or parallel, but may be slightly tilted or have deviations. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but may be slightly tilted. Alternatively, it can be simplified to mean that the corresponding devices / components / elements are set in directions such as "horizontal", "vertical", "overhanging", "parallel", etc., and can have an error / deviation of ±10% relative to the corresponding direction setting, more preferably an error / deviation within ±8%, more preferably an error / deviation within ±6%, more preferably an error / deviation within ±5%, and more preferably an error / deviation within ±4%. As long as the corresponding device / component / element is within the error / deviation range, it can still achieve its role in the solution of the utility model.

[0039] In addition, the expressions “first”, “second”, “third”, etc. that appear in the terms are merely descriptions used to distinguish the same or similar components and should not be understood as emphasizing or implying the relative importance of specific components.

[0040] In addition, in the description of the embodiments of the present invention, "several", "multiple" and "a number" represent at least 2. It can be any number such as 2, 3, 4, 5, 6, 7, 8, 9, and even more than 9.

[0041] In addition, in the description of the technical solution of the utility model, unless otherwise clearly specified / defined / restricted, the terms "set", "install", "connect", "connected", "provided with", "laid", and "arranged" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection, and can be welding, riveting, bolting, threading, and other commonly used connection means in the field. This connection can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection, or an indirect connection through an intermediate medium, and it can be the internal communication of two components.

[0042] Example 1

[0043] A bridge deck drainage structure, see Figure 1-4 , including a bridge deck 10 and a drainage component, the bridge deck 10 has a carriageway area 11 and sidewalk areas 12 located on both sides of the carriageway area 11 in the horizontal direction; the road surface of the carriageway area 11 has a bridge deck transverse slope that slopes downward from the center to both sides, and a bridge deck longitudinal slope that is inclined along the bridge direction; the drainage component includes a drainage channel, a drainage trough 30 and a drainage pipe 40; the drainage channel is connected to the part of the bridge deck close to the outside of the carriageway area 11 at the upstream, and is connected to the drainage trough 30 at the downstream, and the drainage channel is located below the road surface of the sidewalk area 12; the drainage trough 30 is located on both sides of the bridge deck 10 in the horizontal direction, the drainage trough 30 is extended along the bridge direction, and a rainwater inlet 31 is opened in the drainage trough 30; the water inlet end of the drainage pipe 40 is connected to the rainwater inlet 31, and the water outlet end of the drainage pipe 40 is connected to the municipal pipe network.

[0044] The carriageway area 11 is used for vehicles to pass, and the sidewalk area 12 is used for pedestrians and / or non-motorized vehicles to pass. Generally speaking, the road surface of the sidewalk area 12 is higher than that of the carriageway area 11 .

[0045] The gradient of the bridge deck transverse slope can be selected to be 1.5%. The lowest point of the bridge deck transverse slope is located at the junction of the carriageway area 11 and the pedestrian area 12. The junction is generally provided with a crash barrier 50 or steps.

[0046] The drainage channel is used to guide the water flow out of the carriageway area 11. The drainage channel can be a tubular structure closed on all sides, or an open concave structure, or other similar structures that can guide the water flow; the upstream of the drainage channel is connected to the part close to the outside of the carriageway area 11, and the part close to the outside refers to the side position of the carriageway area 11 facing the cross bridge upward, which is generally the downhill end of the cross slope of the bridge deck of the carriageway area 11. A water inlet for water flow to enter is arranged upstream of the drainage channel. The water inlet can be opened on the side of the crash barrier 50 / step, or can be arranged on the bridge deck 10.

[0047] Under the guidance of the transverse slope of the bridge deck, rainwater will gather on the downhill side of the transverse slope of the bridge deck and form strips of accumulated water. Since the water inlets of the drainage channel are generally arranged at intervals along the direction of the bridge, rainwater cannot flow into the water inlets quickly and will still form a certain amount of accumulated water. For this reason, a longitudinal slope of the bridge deck can be set on the bridge deck 10. Its function is to guide the rainwater to flow along the direction of the bridge, so that it can be discharged from the carriageway area 11 through the water inlet more quickly.

[0048] The drainage ditch 30 is located on both lateral sides of the bridge deck 10, and can be either a side located on the bridge deck 10 or a drainage ditch structure located outside the side of the bridge deck 10. The drainage ditch 30 is extended along the bridge direction and is connected with the downstream of the drainage channel to collect rainwater flowing out of the drainage channel; a rainwater inlet 31 is opened in the drainage ditch 30, and the rainwater inlet 31 is connected to the drainage pipe 40, and the drainage pipe 40 is connected to the municipal pipeline network, so that rainwater can be discharged from the drainage ditch 30 through the rainwater inlet 31 and enter the municipal pipeline network, thereby preventing rainwater from eroding the bridge structure or impacting the ground below.

[0049] Therefore, the bridge deck drainage structure provided by the present application sets a transverse slope of the bridge deck in the carriageway area 11, which can quickly introduce rainwater into both sides of the carriageway area 11, and sets a longitudinal slope of the bridge deck so that rainwater on both sides of the carriageway area 11 can flow along the direction of the bridge, so that rainwater can be discharged from the carriageway area 11 from the upstream opening of the drainage channel, avoiding the formation of water accumulation in the carriageway area 11 and affecting driving safety; the downstream of the drainage channel is connected to the drainage trough 30, which can guide rainwater discharged from the carriageway area 11 into the drainage trough 30. After the rainwater gathers in the drainage trough 30, it flows out of the bridge deck 10 through the rainwater outlet 31 set in the drainage trough 30, preventing rainwater from backflowing into the carriageway area 11 along the drainage channel; guiding the rainwater into the municipal pipeline network through the drainage pipe 40 can prevent the corrosive substances in the rainwater from eroding the bridge or washing the ground under the bridge, which is beneficial to maintaining the safety of the bridge structure and conforms to the concept of green environmental protection.

[0050] Example 2

[0051] The present embodiment provides a bridge deck drainage structure, which is different from the embodiment 1 in that, in the present embodiment, the pedestrian area 12 has a pedestrian structure, the pedestrian structure is arranged on the bridge deck 10, and the drainage channel is arranged inside the pedestrian structure.

[0052] See also Figure 2 The sidewalk structure may include a crash barrier 50, a cushion stone 51 and a sidewalk slab 52. The crash barrier 50 is located on the left and right sides of the sidewalk area 12, the cushion stone 51 is located between the crash barrier 50, and the sidewalk slab 52 is erected on the crash barrier 50 and the cushion stone 51 to form a road surface for pedestrians to pass; the drainage channel can be set between the sidewalk slab 52 and the bridge deck 10, so that there is no need to excavate the bridge deck 10, which facilitates the laying of the drainage channel and the subsequent cleaning and maintenance of the drainage channel, and is conducive to maintaining the structural integrity of the bridge deck 10.

[0053] In addition, the drainage channel may include a drainage pipe 20, which is arranged on an obstacle along the drainage channel, and the cross-sectional shape of the drainage pipe 20 is square; the obstacle may be a crash barrier 50 or a cushion stone 51 that plays a supporting role in the sidewalk structure. In order to ensure the smooth flow of the drainage channel, holes for water flow may be opened on the crash barrier 50, the cushion stone 51 or similar structures, and the drainage pipe 20 may be arranged in the holes. The drainage pipe 20 may be a plastic pipe or a steel pipe, which is used to prevent the running water from continuously eroding the crash barrier 50, the cushion stone 51 and other structures; the shape of the drainage pipe 20 may be round or square, etc., and the present embodiment is preferably square. The square drainage pipe 20 has a higher drainage capacity and is more in line with the bridge deck structure, which is beneficial to reduce pipeline vibration and improve the safety and reliability of the drainage system.

[0054] On the basis of the above, it is more preferred that a water retaining weir 21 is provided on the side of the drainage channel; the water retaining weir 21 is a blocking structure arranged on one side or both sides of the drainage channel to retain water, and the top surface of the water retaining weir 21 is higher than the bottom surface of the drainage channel, so that rainwater can flow into the drainage ditch 30 along the drainage channel as quickly as possible to prevent rainwater from backflowing or continuously scouring other bridge deck structures; the water retaining weir 21 is generally arranged on both sides of the drainage channel. Preferably, when the bridge deck 10 of the pedestrian area 12 also has a slope arranged along the bridge direction, the water retaining weir 21 can be arranged only on the downslope side of the drainage channel, that is, the side located at a lower position along the bridge.

[0055] Optionally, the water retaining weir 21 may be a semi-elliptical cross-section with a length of 14 cm and a height of 5 cm.

[0056] Example 3

[0057] The present embodiment provides a bridge deck drainage structure, which is different from that of Embodiment 1 or 2 in that a water collection slope 32 is provided on both sides of the cross bridge of the rainwater outlet 31 , and the water collection slope 32 can guide water flow into the rainwater outlet 31 .

[0058] See also Figure 4 The water collection slope 32 refers to the slopes inclined at both sides of the rainwater outlet 31 , and the downhill side of the water collection slope 32 points to the rainwater outlet 31 to speed up the entry of rainwater into the rainwater outlet 31 .

[0059] In the preferred solution, the upstream end of the drainage channel and the rainwater outlet 31 are both provided with a grille 22, which can prevent large solid objects such as gravel and waste from entering the drainage channel and the drainage pipe 40, thereby facilitating the maintenance and cleaning of the drainage system.

[0060] Optionally, the upstream end of the drain pipe 20 adopts a finished steel grating 22 plate; the rainwater inlet 31 adopts a steel plate grating 22.

[0061] Example 4

[0062] The bridge deck drainage structure provided in this embodiment is different from that in Embodiment 1, 2 or 3 in that, in this embodiment, the diameter of the drainage pipe 40 is 18-22 cm. Considering the dual factors of drainage volume and anti-clogging, the diameter of the drainage pipe 40 can be set to 20 cm.

[0063] In a preferred embodiment, the drainage pipe 40 includes a steel pipe section 41 and a PVC pipe section 42. The steel pipe section 41 is a steel pipe, and the PVC pipe section 42 is a PVC pipe. Figure 4 The steel pipe section 41 is in direct contact with the rainwater inlet 31 and is buried or partially buried in the bridge structure. Considering the load and deformation during the operation of the bridge, the drainage pipe 40 here is relatively easy to be damaged, and the steel pipe has better durability and structural strength, which can increase its service life; the PVC pipe has better durability and corrosion resistance and lower cost, and can be used in locations that are not in direct contact with the bridge structure.

[0064] On the basis of the above, it is more preferred that the drain pipe 40 can be fixed by a self-anchoring pipe clamp 43.

[0065] Example 5

[0066] This embodiment provides a bridge, including a bridge deck 10 and a supporting structure, and a bridge deck drainage structure as described in Embodiment 1, 2, 3 or 4, wherein: the supporting structure is a pier and / or abutment, and the drainage pipe 40 is fixed on the supporting structure.

[0067] A bridge provided in the present application adopts a bridge deck drainage structure as described above, and the drainage system is easy to arrange, its safety and reliability are guaranteed, and the drainage efficiency is greatly improved. It can quickly discharge rainwater on the bridge deck 10 to the carriageway area 11, reduce surface water and runoff on the bridge, and ensure driving safety in the carriageway area 11; collect rainwater in a closed loop and finally flow it into the municipal pipeline network, so as to prevent corrosive substances from affecting the bridge structure and damaging the environment, which is beneficial to improving the service life of the bridge.

[0068] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A bridge deck drainage structure, characterized in that: The invention comprises a bridge deck (10) and a drainage assembly, wherein the bridge deck (10) has a carriageway area (11) and pedestrian walkway areas (12) located on both sides of the carriageway area (11); The road surface of the carriageway area (11) has a bridge deck transverse slope that slopes downward from the center to both sides, and a bridge deck longitudinal slope that is inclined along the direction of the bridge; The drainage assembly comprises a drainage channel, a drainage trough (30) and a drainage pipe (40); The upstream of the drainage channel is connected to the outer side of the bridge deck of the carriageway area (11), and the downstream of the drainage channel is connected to the drainage ditch (30). The drainage channel is located below the road surface of the pedestrian area (12); The drainage groove (30) is located on both sides of the bridge deck (10) in the transverse direction, and the drainage groove (30) is extended along the bridge direction. A rainwater outlet (31) is provided in the drainage groove (30); The water inlet end of the drainage pipe (40) is connected to the rainwater inlet (31), and the water outlet end of the drainage pipe (40) is connected to the municipal pipe network.

2. A bridge deck drainage structure according to claim 1, characterized in that: The pedestrian area (12) has a pedestrian structure, the pedestrian structure is arranged on the bridge deck (10), and the drainage channel is arranged inside the pedestrian structure.

3. A bridge deck drainage structure according to claim 1, characterized in that: The drainage channel comprises a drainage pipe (20), the drainage pipe (20) is arranged on an obstacle along the drainage channel, and the cross-sectional shape of the drainage pipe (20) is square.

4. A bridge deck drainage structure according to any one of claims 1 to 3, characterized in that: A water retaining weir (21) is provided on the side of the drainage channel.

5. The bridge deck drainage structure according to claim 1, characterized in that: The cross bridge of the rainwater outlet (31) is provided with water collection slopes (32) on both sides, and the water collection slopes (32) can guide water flow into the rainwater outlet (31).

6. A bridge deck drainage structure according to claim 1, characterized in that: The upstream end of the drainage channel and the rainwater outlet (31) are both provided with grilles (22).

7. A bridge deck drainage structure according to claim 1, characterized in that: The diameter of the drainage pipe (40) is 18-22 cm.

8. The bridge deck drainage structure according to claim 1, characterized in that: The drainage pipe (40) comprises a steel pipe section (41) and a PVC pipe section (42); the steel pipe section (41) is a steel pipe, and the PVC pipe section (42) is a PVC pipe.

9. A bridge deck drainage structure according to claim 1, 7 or 8, characterized in that: The drainage pipe (40) is fixed by a self-anchoring pipe clamp (43).

10. A bridge, characterized in that: It comprises a bridge deck (10) and a supporting structure, and a bridge deck drainage structure as described in any one of claims 1 to 9, wherein the supporting structure is a pier and / or an abutment, and the drainage pipe (40) is fixed to the supporting structure.

Images