Rainwater drainage system for bridges

Abstract

The present invention discloses a rainwater drainage system for a bridge, which includes a bridge body and a rainwater drainage component. The rainwater drainage component includes a catch gutter, a diversion pipe and a pressure relief pipe. The catch gutter has a gutter opening at the top of the catch gutter and a drainage opening at the bottom of the catch gutter. The gutter opening is closed by a cover plate, and the cover plate has a water leakage opening. The diversion pipe is communicated with the catch gutter through the drainage opening; the pressure relief pipe penetrates through the side wall of the catch gutter to communicate the catch gutter with a preset environment; the catch gutter is arranged at one end of the bridge body in the transverse direction, and the bottom surface of the catch gutter slopes downward along a preset direction I; the rainwater drainage component further includes a collecting pipe communicated with the bottom of the diversion pipe, and the collecting pipe slopes downward along a preset direction II, and the preset direction I and the preset direction II are opposite; it can improve the drainage efficiency of rainwater, reduce the accumulation of rainwater on the bridge deck, reduce the blockage of drainage pipes by garbage, etc., and reduce the damage of rainwater to the bridge deck paving layer.

Description

Technical Field

[0001] The present invention relates to the field of bridge drainage systems, and particularly to a rainwater drainage system for bridges. Background Art

[0002] Bridges are indispensable road buildings in modern urban construction. Since bridges are very important transportation fortresses in modern society, people attach great importance to the safety guarantee of bridges. On rainy days, in order to avoid excessive water accumulation on the bridge and pose a safety hazard to vehicle driving, drainage devices are now added to bridge construction.

[0003] However, the drainage pipes of bridges often have a small drainage volume. When the rainfall is too large, rainwater cannot be quickly discharged from the bridge surface, resulting in water accumulation on the bridge surface, deep water gathering, traffic jams, safety hazards to bridges, vehicles, etc., and the bridge deck pavement layer will also peel off, become loose, have potholes, etc. At the same time, when it rains, a large amount of garbage will be washed in by the rainwater, which is likely to block the drainage pipes.

[0004] Therefore, to solve the above problems, a rainwater drainage system for bridges is needed, which can improve the drainage efficiency of rainwater, reduce the accumulation of rainwater on the bridge surface, and at the same time reduce the blockage of drainage pipes by garbage, etc., and reduce the damage of rainwater to the bridge deck pavement layer. Summary of the Invention

[0005] In view of this, the purpose of the present invention is to overcome the defects in the prior art and provide a rainwater drainage system for bridges, which can improve the drainage efficiency of rainwater, reduce the accumulation of rainwater on the bridge surface, and at the same time reduce the blockage of drainage pipes by garbage, etc., and reduce the damage of rainwater to the bridge deck pavement layer.

[0006] The rainwater drainage system for bridges of the present invention includes a bridge body and a rainwater drainage component. The rainwater drainage component includes a catch gutter for collecting the accumulated water on the bridge body and a diversion pipe for discharging the accumulated water in the catch gutter. The catch gutter has a gutter opening at the top of the catch gutter and a drainage opening at the bottom of the catch gutter. The gutter opening is closed by a cover plate, and the cover plate has a water leakage opening, and the water leakage openings are multiple arranged on the cover plate. The diversion pipe is communicated with the catch gutter through the drainage opening;

[0007] The rainwater drainage component further includes a pressure relief pipe, and the pressure relief pipe penetrates through the side wall of the catch gutter to communicate the catch gutter with a preset environment;

[0008] The catch gutter is arranged at one end of the bridge body in the transverse direction, and the bottom surface of the catch gutter is inclined obliquely downward along a preset direction Ⅰ;

[0009] The rainwater drainage component further includes a collecting pipe connected to the bottom of the diversion pipe. The collecting pipe is strip-shaped and extends along the length direction of the bridge body. The collecting pipe is inclined obliquely downward along a preset direction II, and the preset direction I and the preset direction II are opposite to each other.

[0010] Furthermore, the catchment ditch is strip-shaped and extends along the length direction of the bridge body. The rainwater drainage components are two groups respectively arranged on both sides of the middle part of the bridge body in the transverse direction.

[0011] Furthermore, there are multiple drain openings, and the multiple drain openings are arranged on the bottom surface of the catchment ditch along the preset direction I;

[0012] The diversion pipe is a straight pipe I, and there are multiple diversion pipes. The diversion pipes and the drain openings are in a one-to-one correspondence relationship, and the multiple diversion pipes are connected to the collecting pipe.

[0013] Furthermore, the end of the collecting pipe that is higher in the height direction is the far-water end of the collecting pipe, and the end of the collecting pipe that is lower in the height direction is the near-water end of the collecting pipe;

[0014] The end of the bottom surface of the catchment ditch that is higher in the height direction is the far-water end of the catchment ditch, and the end of the bottom surface of the catchment ditch that is lower in the height direction is the near-water end of the catchment ditch;

[0015] The far-water end of the collecting pipe is located inside the near-water end of the catchment ditch, so that there is a rectifying section arranged on the outer side of the near-water end of the collecting pipe along the preset direction I between the far-water end of the collecting pipe and the near-water end of the catchment ditch.

[0016] Furthermore, the drain opening is closed by a water filter plate, and the water filter plate has water filter openings, and the water filter openings are multiple and arranged on the water filter plate.

[0017] Furthermore, the caliber of the water filter opening is smaller than the caliber of the water leakage opening.

[0018] Furthermore, a filter mesh cover is arranged at the end of the pressure relief pipe close to the catchment ditch, and the filter mesh cover has filter holes for rainwater to pass through.

[0019] Furthermore, the pressure relief pipe is a straight pipe II. The end of the pressure relief pipe connected to the catchment ditch is the water inlet end of the pressure relief pipe, and the end of the pressure relief pipe connected to the preset environment is the water outlet end of the pressure relief pipe. In the height direction, the water inlet end of the pressure relief pipe is located at the top of the water outlet end of the pressure relief pipe.

[0020] Furthermore, the rainwater drainage component further includes a support plate, and the support plate is installed in the catchment ditch to form a support for the cover plate.

[0021] Furthermore, a clamping block is formed by the bottom surface of the cover plate protruding downward along the height direction, and a clamping groove is formed by the top surface of the support plate recessing downward along the height direction. The clamping block and the clamping groove are adapted so that the cover plate is limited on the support plate.

[0022] The beneficial effects of the present invention are as follows: A rainwater drainage system for bridges disclosed by the present invention has the following advantages:

[0023] a. By setting the bottom surface of the catch gutter as an inclined surface, the water in the catch gutter flows from one end to the other end, keeping the water in the catch gutter in a flowing state. This is beneficial for the water flow on the catch gutter to drain into the collecting pipe through the guiding pipe at the bottom, and then through the collecting pipe and the drain pipe into the ground drainage facilities. At the same time, the setting of the inclined surface enhances the water flow speed and improves the water flow impact force. During the process of water flow in the catch gutter, the sundries in the catch gutter can be washed from one end to the other end and gathered together, thus facilitating the later cleaning of the sundries in the catch gutter, improving the cleaning efficiency, and reducing the labor intensity of workers. Through the setting of the water filtering sheet, it can effectively prevent the phenomenon that sundries enter the guiding pipe and cause pipe blockage. By setting the collecting pipe inclined, and the inclined direction is opposite to that of the bottom surface of the catch gutter, the water flow speed in the collecting pipe is accelerated, and the water flow impact force is improved, so that sediment and dust are not easily deposited in the pipe under the impact of the water flow in the pipe, keeping the pipe unobstructed.

[0024] b. Through the setting of the pressure relief pipe, when a heavy rain occurs and the drainage effect of the drainage pipe cannot be decompressed, it will cause a large amount of accumulated water in the catch gutter. When the accumulated water in the catch gutter overflows the water inlet of the pressure relief pipe, the accumulated water in the catch gutter will flow out through the pressure relief pipe, thus accelerating the drainage speed of the catch gutter, being beneficial for decompressing the catch gutter, further improving the drainage efficiency, avoiding the accumulation of water on the bridge, being beneficial for the passage of vehicles, and through the setting of the filter mesh cover, it can effectively prevent the phenomenon that sundries enter the pressure relief pipe and cause blockage.

[0025] c. By setting the support plate, it plays a supporting role for the cover plate, and there are round holes on the support plate for passing through the pressure relief pipe. Through the cooperation between the set catch blocks and the slots, it plays a positioning role for the cover plate, facilitating the quick installation and disassembly of the cover plate. When installing the cover plate, only need to make the four catch blocks at the bottom of the cover plate correspond to the slots on the support plate, so that the cover plates are connected end to end in sequence, which can effectively avoid the phenomenon of displacement of the cover plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The present invention will be further described below in conjunction with the drawings and embodiments:

[0027] Figure 1 is the structural schematic diagram of the present invention;

[0028] Figure 2 is the front view structural schematic diagram of the present invention;

[0029] Figure 3Schematic side view structure of the present invention;

[0030] Figure 4 Schematic structure of the cover plate separation water collection gutter of the present invention;

[0031] Figure 5 Schematic structure of the water filter separation drain outlet of the present invention;

[0032] Figure 6 Schematic structure of the pressure relief pipe with a filter mesh cover of the present invention;

[0033] Figure 7 Schematic structure of the sub-cover plate of the present invention;

[0034] Figure 8 For the present invention Figure 2 Schematic A - A direction structure. Specific embodiments

[0035] Figure 1 Schematic structure of the present invention. As shown in the figure, the top and bottom refer to the top and bottom in the height direction, the transverse direction is the width direction of the bridge body 1, and the longitudinal direction is the length direction of the bridge body 1, which will not be elaborated here; the rainwater drainage system for the bridge in this embodiment includes the bridge body 1 and the rainwater drainage assembly. The rainwater drainage assembly includes a water collection gutter 2 for collecting the accumulated water on the bridge body 1 and a diversion pipe 5 for discharging the accumulated water in the water collection gutter 2. The diversion pipe 5 is connected to the drain pipe 7 through a collection pipe 6. The collection pipe 6 is connected to the bottom of the diversion pipe 5. The drain pipe 7 is used to discharge the rainwater in the water collection gutter 2 into the ground drainage facilities. The water collection gutter 2 has a gutter opening at the top of the water collection gutter 2 and a drain outlet 12 at the bottom of the water collection gutter 2. This rainwater discharge method of the water collection gutter 2 is approximately direct discharge, which can make full use of the gravitational potential energy of the rainwater, accelerate the discharge of rainwater in the water collection gutter 2, and reduce the accumulation of rainwater in the water collection gutter 2. The gutter opening is closed by a cover plate, and the cover plate has a water leakage opening 14. The water leakage openings 14 are multiple arranged on the cover plate. The diversion pipe 5 is connected to the water collection gutter 2 through the drain outlet 12;

[0036] The catch drain 2 is arranged at one end of the bridge body 1 in the transverse direction. Of course, the catch drain 2 can also be arranged in the middle of the bridge body 1 in the transverse direction according to actual conditions, or obliquely arranged at the front and rear ends in the longitudinal direction of the bridge body 1 through the middle of the bridge body 1 in the transverse direction to meet the drainage requirements, which will not be elaborated here. In this solution, the catch drain 2 is arranged at one end of the bridge body 1 in the transverse direction, reducing the interference to the driving surface or pedestrian surface of the bridge body 1, and at the same time facilitating the collection of rainwater on the bridge surface. The catch drain 2 is in the shape of a strip extending along the length direction of the bridge body 1, and the longitudinal ends of the catch drain 2 are closed. Further, the cross-section of the catch drain 2 is rectangular, which is conducive to the formation of the catch drain 2. The transverse side wall of the bridge body 1 where the catch drain 2 is located extends upward to form a side beam 15 for protecting the catch drain 2.

[0037] Further, the rainwater drainage components are two groups respectively arranged on both sides of the middle part of the bridge body 1 in the transverse direction. The catch drains 2 in the two groups of rainwater drainage components are symmetrically arranged at the transverse two ends of the bridge body 1 with the central axis passing through the middle part of the bridge body 1 in the transverse direction as the axis of symmetry. The central axis passing through the middle part of the bridge body 1 in the transverse direction symmetrically divides the bridge body 1. The side walls at the corresponding transverse two ends of the bridge body 1 respectively extend upward to form side beams 15 in one-to-one correspondence with the catch drains 2, making the rainwater drainage system for the bridge more beautiful, and at the same time further accelerating the drainage efficiency of rainwater on the bridge surface, further improving the protection of the bridge body 1, reducing the collection of rainwater on the bridge surface, and reducing the damage of rainwater to the bridge deck paving layer.

[0038] In this solution, the cover plate is composed of multiple sub-cover plates 4 joined end to end, which is conducive to the cleaning of specific areas and the maintenance of local areas of the drainage system. A number of the water leakage openings 14 are distributed on the sub-cover plates 4 according to a predetermined route. The purpose of arranging the water leakage openings 14 is to drain water while reducing the blockage of drainage pipes by garbage and the like larger than the size of the water leakage openings 14. The predetermined route can be in the shape of repeated bends, in the shape of a circular ring, or in the shape of irregular intervals, as long as the drainage function and the function of filtering large-sized garbage are satisfied, which will not be elaborated here. As shown in the figure, the sub-cover plates 4 in this solution are rectangular extending along the longitudinal direction, and the water leakage openings 14 are in the shape of rectangular strips. A number of the water leakage openings 14 are distributed on the sub-cover plates 4 at intervals and orderly in both the transverse and longitudinal directions;

[0039] The drain outlet 12 is closed by a water filter sheet 10 which has water filter openings arranged thereon, and there are multiple such water filter openings; the diameter of the water filter openings is smaller than that of the water leakage opening 14. In this solution, the water filter openings are circular holes, and there are multiple water filter openings distributed on the water filter sheet 10. The arrangement of the water filter sheet 10 with water filter openings in the catchment ditch 2 can further play a filtering role, further filtering the garbage entering the catchment ditch 2 through the auxiliary cover plate 4 to prevent the blockage of the drainage pipeline. A groove for limiting and installing the water filter sheet 10 is formed at the bottom of the catchment ditch 2 to prevent the water filter sheet 10 from detaching from the drain outlet 12 and ensure the water filtering function of the water filter sheet 10. The cooperation between the water filter sheet 10 and the auxiliary cover plate 4 can ensure the rapid collection of rainwater in the catchment ditch 2, prevent the interference of garbage and other sundries on the rainwater discharge, and improve the drainage efficiency of rainwater.

[0040] The rainwater discharge assembly further includes a support plate 3 which is installed in the catchment ditch 2 to support the cover plate; the arrangement of the support plate 3 in the catchment ditch 2 can improve the installation strength of the cover plate in the catchment ditch 2 and prevent the damage to the cover plate when the rainwater volume is too large. Such damage methods are not limited to the oppression of the rainwater volume and the impact of the potential energy of the rainwater convergence, etc., which will not be elaborated here. The support plate 3 can be arranged horizontally in the catchment ditch 2, or vertically in the catchment ditch 2, or in the middle of the catchment ditch 2, all of which can meet the function of supporting the cover plate. The arrangement method with less interference to the drainage is preferred and will not be elaborated here;

[0041] A clamping block 11 protrudes downward along the height direction on the bottom surface of the cover plate, and a clamping groove 9 is recessed downward along the height direction on the top surface of the support plate 3. The clamping block 11 and the clamping groove 9 are adapted. Such adaptation means being suitable in terms of size, that is, there is no gap or a very small gap after the clamping block 11 and the clamping groove 9 are matched, so that the cover plate is limited on the support plate 3 to prevent the cover plate from detaching from the catchment ditch 2. By setting the cooperation between the clamping block 11 and the clamping groove 9, it plays a positioning role for the auxiliary cover plate 4, facilitating the rapid installation and disassembly of the auxiliary cover plate 4 in a certain area. When installing the auxiliary cover plate 4, only need to make the four clamping blocks 11 at the bottom of the auxiliary cover plate 4 correspond to and disengage from the clamping grooves 9 on the support plate 3. Moreover, the auxiliary cover plates 4 are connected end to end in sequence to form a cover plate, which can effectively avoid the phenomenon of the cover plate displacement.

[0042] The supporting plates 3 in this solution are two pieces respectively arranged on the transverse side walls of the catchment ditch 2. The two supporting plates 3 form a support for several auxiliary cover plates 4. As shown in the figure, the auxiliary cover plates 4 are assembled into a rectangle with their ends connected on the two supporting plates 3. Four clamping blocks 11 are formed on each auxiliary cover plate 4 in a rectangular distribution. The four clamping blocks 11 are symmetrically distributed at the transverse two ends of the bottom of the auxiliary cover plate 4. The axis of symmetry of the four clamping blocks 11 is the central axis passing through the transverse middle of the auxiliary cover plate 4 and symmetrically dividing the auxiliary cover plate 4. Corresponding grooves 9 in one-to-one correspondence with the number of the clamping blocks 11 are also provided on the two supporting plates 3 for installing the auxiliary cover plates 4, which satisfies the stable installation of the auxiliary cover plates 4 on the supporting plates 3 and plays an effective role in filtering water and blocking garbage.

[0043] The rainwater drainage assembly further includes a pressure relief pipe 8. The pressure relief pipe 8 penetrates through the side wall of the catchment ditch 2 to connect the catchment ditch 2 with a preset environment. Of course, when the pressure relief pipe 8 penetrates through the side wall of the catchment ditch 2, it also correspondingly penetrates through the adjacent supporting plate 3, so that the pressure relief pipe 8 connects the catchment ditch 2 with the preset environment. The preset environment can be in the form of directly discharging to the external environment, or in the form of a drain pipe 7 connected to the ground drainage facility, etc., in order to achieve the purpose of accelerating the drainage efficiency of the rainwater in the catchment ditch 2. This will not be elaborated here. In this solution, the pressure relief pipe 8 connects the catchment ditch 2 with the external environment in a direct discharge form. When there is too much rainwater stored in the catchment ditch 2 and it is difficult to be discharged from the drain opening 12, and the water level reaches the lowest point of the water inlet end of the pressure relief pipe 8, it can be discharged through the bypass pressure relief pipe 8, which plays a role in accelerating the drainage efficiency of the rainwater in the catchment ditch 2; more clearly, when a heavy rain occurs and the drainage effect of the drainage pipe cannot relieve the pressure, it will cause a large amount of water accumulation in the catchment ditch 2. When the accumulated water in the catchment ditch 2 overflows the water inlet of the pressure relief pipe 8, a large amount of the accumulated water in the catchment ditch 2 will flow out through the pressure relief pipe 8, thereby accelerating the drainage speed of the catchment ditch 2, being beneficial to decompressing the catchment ditch 2, improving the drainage efficiency, avoiding the accumulation of water on the bridge, and being beneficial to the passage of vehicles.

[0044] A filter mesh cover 13 is arranged at one end of the pressure relief pipe 8 close to the catchment ditch 2. The filter mesh cover 13 has filter holes 16 for rainwater to pass through; and through the setting of the filter mesh cover 13, it can effectively prevent sundries from entering the pressure relief pipe 8 and causing blockage. The arrangement of the filter mesh cover 13 on the pressure relief pipe 8 can further filter the rainwater discharged from the pressure relief pipe 8, preventing sundries and garbage larger than the size of the filter holes 16 from being discharged through the pressure relief pipe 8 and causing danger. Further, the filter mesh cover 13 is installed at the water inlet end of the pressure relief pipe in the catchment ditch 2, which is beneficial to the installation of the overall structure. As shown in the figure, the filter mesh cover 13 is in the shape of a cylinder with one end sealed. The opening of the cylindrical filter mesh cover 13 is buckled and fixed at the water inlet end of the pressure relief pipe, playing a protective role and at the same time expanding the filtering area of the water inlet end of the pressure relief pipe and improving the discharge efficiency of the rainwater discharged through the pressure relief pipe 8.

[0045] The pressure relief pipe 8 is a straight pipe II. The meaning of the straight pipe II is that the structure of the pressure relief pipe 8 is a straight pipe structure. Any one of the existing technologies can be selected, as long as it can achieve the purpose of conducting the catchment ditch 2 and the preset environment, which will not be elaborated here. This reduces the flow time of rainwater in the pressure relief pipe 8 and improves the efficiency of guiding rainwater from the catchment ditch 2 into the preset environment. The end of the pressure relief pipe 8 connected to the catchment ditch 2 is the pressure relief pipe water inlet end, and the end of the pressure relief pipe 8 connected to the preset environment is the pressure relief pipe water outlet end. In the height direction, the pressure relief pipe water inlet end is located at the top of the pressure relief pipe water outlet end; this further improves the drainage efficiency of the catchment ditch 2 through the pressure relief pipe 8.

[0046] A plurality of the pressure relief pipes 8 are arranged at intervals along the length direction of the catchment ditch 2. Further, the plurality of pressure relief pipes 8 are evenly distributed in the length direction of the catchment ditch 2, which improves the drainage efficiency of the catchment ditch 2 when the water level is relatively high.

[0047] In this embodiment, the bottom surface of the catchment ditch slopes obliquely downward along the preset direction I. The bottom surface of the catchment ditch 2 slopes obliquely downward along the length direction of the bridge body 1 towards the preset direction I. When the amount of rainwater is not sufficient to be directly discharged through the water filter 10, the rainwater will gather in the catchment ditch 2. By setting the bottom surface of the catchment ditch 2 as an inclined surface, the rainwater in the catchment ditch 2 flows from the higher end to the lower end, making the rainwater in the catchment ditch 2 in a flowing state, which is beneficial for the water flow on the catchment ditch 2 to be discharged into the collecting pipe 6 through the diversion pipe 5 arranged at the bottom, and then through the collecting pipe 6 and the drain pipe 7 into the ground drainage facilities; the setting of the inclined surface enhances the water flow speed and improves the water flow impact force. During the process of the water flow in the catchment ditch 2, the sundries in the catchment ditch 2 can be washed from the higher end to the lower end and gathered together, thus facilitating the later cleaning of the sundries in the catchment ditch 2, improving the cleaning efficiency and reducing the labor intensity of the workers. Through the setting of the water filter 10, the phenomenon of sundries entering the diversion pipe 5 and causing pipe blockage can be effectively prevented.

[0048] In this embodiment, the rainwater drainage assembly further includes a collecting pipe 6 connected to the bottom of the diversion pipe 5. The collecting pipe 6 is in the shape of a strip extending along the length direction of the bridge body 1, that is, the collecting pipe 6 is arranged along the bridge extension direction. The collecting pipe slopes obliquely downward along the preset direction II. The collecting pipe 6 slopes obliquely downward along the length direction of the bridge body 1 towards the preset direction II. The preset direction I and the preset direction II are opposite; the preset direction I and the preset direction II are opposite in the length direction of the bridge body, which further meets the effectiveness of the rainwater confluence in the catchment ditch 2 and the drainage efficiency of the rainwater in the collecting pipe 6. Of course, when the catchment ditch is obliquely arranged on the bridge body, the collecting pipe is connected to its bottom, and the collecting pipe and the catchment ditch form a "V"-shaped connection structure in space, which can also meet the drainage and anti-blocking requirements and will not be elaborated here;

[0049] The drain openings 12 are multiple, and the multiple drain openings 12 are arranged on the bottom surface of the catchment ditch 2 along a preset direction I. Further, the multiple drain openings 12 are uniformly arranged from high to low along the preset direction I, so that when the water flows from high to low on the bottom surface of the catchment ditch 2, it passes through the arranged drain openings 12 in sequence;

[0050] The diversion pipe 5 is a straight pipe I, and the discharge efficiency is further improved by the gravitational potential energy of rainwater. The meaning of the straight pipe I is that the structure of the diversion pipe 5 is a straight pipe structure, and any one of the existing technologies can be selected, as long as it can achieve the purpose of conducting the drain opening 12 and the diversion pipe 5, which will not be elaborated here. The diversion pipe 5 is vertically arranged to further improve the discharge efficiency of rainwater, reduce the flow time of rainwater in the diversion pipe 5, and improve the efficiency of guiding rainwater from the drain opening 12 into the collecting pipe 6. The diversion pipes 5 are multiple, and the diversion pipes 5 and the drain openings 12 are in a one-to-one correspondence relationship, and the multiple diversion pipes 5 are communicated with the collecting pipe 6.

[0051] In this embodiment, the high end of the collecting pipe 6 in the height direction is the far water end of the collecting pipe, and the low end of the collecting pipe 6 in the height direction is the near water end of the collecting pipe. The direction from the far water end of the collecting pipe to the near water end of the collecting pipe along the length direction of the bridge body is the preset direction II; the multiple diversion pipes 5 sequentially connect the corresponding drain openings 12 to the collecting pipe 6. The rainwater discharge assembly further includes a drain pipe 7 connected to the near water end of the collecting pipe. The drain pipe 7 is used to discharge the rainwater in the catchment ditch 2 into the ground drainage facilities. As shown in the figure, the drain pipe 7 is hidden in the main support beam 17 that supports the bridge deck near the near water end of the collecting pipe. Further, the drain pipe 7 extends upward along the main support beam 17 and bends toward the near water end of the collecting pipe to communicate with the collecting pipe 6, which can achieve the corresponding drainage effect and also meet the aesthetic requirements of the structure.

[0052] The collecting pipe 6 is inclined, and the inclination direction of the collecting pipe 6 is opposite to the inclination direction of the bottom surface of the catchment ditch 2. The height of the end of the collecting pipe 6 connected to the drain pipe 7 is lower than the height of the other end. By inclining the collecting pipe 6, the flow velocity of the water flow in the collecting pipe 6 is increased, the impact force of the water flow is improved, so that the sediment and dust are not easily deposited in the pipe under the impact of the water flow in the pipe, and the pipe is unblocked;

[0053] The high end of the bottom surface of the catchment ditch 2 in the height direction is the far water end of the catchment ditch, and the low end of the bottom surface of the catchment ditch 2 in the height direction is the near water end of the catchment ditch. The direction from the far water end of the catchment ditch to the near water end of the catchment ditch along the length direction of the bridge body is the preset direction I;

[0054] The far water end of the manifold is located at the inner bottom of the near water end of the catch ditch, so that there is a rectifying section arranged on the outer side of the near water end of the manifold along the preset direction I. The "inner" herein refers to the direction longitudinally close to the longitudinal middle of the bridge, and the "outer" is opposite to the "inner" longitudinally. Also, the rainwater collection directions along the preset direction I and the preset direction II are opposite, which is beneficial for the discharge in this drainage system when the rainwater volume is large.

[0055] When rainwater converges in the catch ditch 2, since the bottom surface of the catch ditch 2 is inclined and cooperates with the water filtering sheet 10 that closes the drain opening 12 at the bottom surface of the catch ditch 2, the water flow can converge along the preset direction I. During the convergence process, due to density, the particulate sediment such as sand and gravel at the bottom of the drainage ditch that can pass through the water filtering openings will be discharged into the manifold 6 through the water filtering openings on the water filtering sheet 10. The particulate sediment generally includes mud, sand, stones, gravel, etc. The particulate sediment that cannot pass through the water filtering openings, as well as the sundries and floating objects mixed in the rainwater, will be pushed by the potential energy generated by the rainwater converging on the inclined bottom surface of the catch ditch 2 to converge at the rectifying section. The inner side of the rectifying section is the far water end of the manifold 6. The manifold 6 is arranged along the preset direction II opposite to the preset direction I, which further increases the impact force when the rainwater flows from high to low in the catch ditch 2, and converges the large particulate sediment, sundries and floating objects mixed in the rainwater at the lowest part of the catch ditch 2 in the rectifying section, which is beneficial for later cleaning. At the same time, it can also reduce the blockage of the diversion pipe 5 and the manifold 6. The rainwater in the manifold 6 converges and is discharged to the ground drainage facilities along the preset direction II to the drain pipe 7. At this time, the rainwater flows from the high end to the low end of the collecting pipe, making the rainwater in the manifold 6 in a flowing state, which is beneficial for the water flow in the manifold 6 to flow into the drain pipe 7. The setting of the inclined manifold 6 arranged in the direction opposite to the preset direction I enhances the water flow speed and increases the impact force of the water flow. During the process of the water flow in the manifold 6, the particulate sediment in the manifold 6 can be flushed from the high end to the low end and discharged, thereby reducing the blockage of the manifold 6, improving the efficiency of the entire drainage system, and greatly reducing the occurrence of blockage in each corresponding pipeline during the rainwater discharge process. At the same time, it is also beneficial for the cleaning of sundries in the catch ditch 2. The combination of the rainwater gravitational potential energy and the specific rainwater discharge structure improves the rainwater discharge efficiency on the bridge and can also reduce the blockage of each section of the rainwater discharge pipeline. It is a structural layout that can meet the current environmental requirements.

[0056] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the purpose and scope of the technical solutions of the present invention, and they should all be covered within the scope of the claims of the present invention.

Claims

1. A rainwater drainage system for a bridge, characterized in that: It includes a bridge body and a rainwater drainage component. The rainwater drainage component includes a catch gutter for collecting the accumulated water on the bridge body and a diversion pipe for discharging the accumulated water in the catch gutter. The catch gutter has a gutter opening at the top and a drain opening at the bottom. The gutter opening is closed by a cover plate, and there are a plurality of water leakage openings arranged on the cover plate. The diversion pipe is communicated with the catch gutter through the drain opening; The rainwater drainage component further includes a pressure relief pipe which penetrates through the side wall of the catch gutter to communicate the catch gutter with a preset environment; The catch gutter is arranged at one end of the bridge body in the transverse direction, and the bottom surface of the catch gutter slopes downward along a preset direction I; The rainwater drainage component further includes a collecting pipe connected to the bottom of the diversion pipe. The collecting pipe is strip-shaped and extends along the length direction of the bridge body. The collecting pipe slopes downward along a preset direction II, and the preset direction I and the preset direction II are opposite; The catch gutter is strip-shaped and extends along the length direction of the bridge body. The rainwater drainage component is divided into two groups respectively arranged on both sides of the middle part of the bridge body in the transverse direction; There are a plurality of drain openings which are arranged on the bottom surface of the catch gutter along the preset direction I; The diversion pipe is a straight pipe I. There are a plurality of diversion pipes, and the diversion pipes and the drain openings are in one-to-one correspondence. The plurality of diversion pipes are communicated with the collecting pipe; A filter screen cover is arranged at one end of the pressure relief pipe close to the catch gutter, and the filter screen cover has filter holes for rainwater to pass through.

2. The rainwater drainage system for a bridge according to claim 1, characterized in that: The end of the collecting pipe with a higher height in the height direction is the water-remote end of the collecting pipe, and the end of the collecting pipe with a lower height in the height direction is the water-near end of the collecting pipe; The end of the bottom surface of the catch gutter with a higher height in the height direction is the water-remote end of the catch gutter, and the end of the bottom surface of the catch gutter with a lower height in the height direction is the water-near end of the catch gutter; The water-remote end of the collecting pipe is located inside the water-near end of the catch gutter, so that there is a rectifying section arranged on the outer side of the water-near end of the collecting pipe along the preset direction I between the water-remote end of the collecting pipe and the water-near end of the catch gutter.

3. The rainwater drainage system for a bridge according to claim 1, characterized in that: The drain opening is closed by a water filter sheet, and the water filter sheet has water filter openings which are a plurality of and arranged on the water filter sheet.

4. The rainwater drainage system for a bridge according to claim 3, characterized in that: The diameter of the water filter opening is smaller than that of the water leakage opening.

5. The rainwater drainage system for a bridge according to claim 1, characterized in that: The pressure relief pipe is a straight pipe II. The end of the pressure relief pipe communicating with the catch gutter is the pressure relief pipe water inlet end, and the end of the pressure relief pipe communicating with the preset environment is the pressure relief pipe water outlet end. In the height direction, the pressure relief pipe water inlet end is located at the top of the pressure relief pipe water outlet end.

6. The rainwater drainage system for a bridge according to claim 1, characterized in that: The rainwater drainage component further includes a support plate which is installed in the catch gutter to form a support for the cover plate.

7. The rainwater drainage system for a bridge according to claim 6, characterized in that: The bottom surface of the cover plate protrudes downward along the height direction to form a clamping block, and the top surface of the support plate is recessed downward along the height direction to form a clamping groove. The clamping block and the clamping groove are adapted so that the cover plate is limited on the support plate.

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