Drainage system and drainage method thereof

Abstract

The present application relates to the field of road drainage, and specifically to a drainage system and a drainage method thereof, which comprises: a second drainage channel, a first drainage channel and a water storage part arranged in sequence according to a first direction, the second drainage channel being adjacent to the road, the water inlet of the first drainage channel being connected to the flow path of water accumulated on the road; the first drainage channel and the second drainage channel being separated by a spacer and connected through an overflow port at the top of the spacer, the flow cross-sectional area of ​​the first drainage channel being smaller than that of the second drainage channel, the first direction being a direction perpendicular to the extension direction of the road on a horizontal plane; the water storage part being arranged at intervals in the direction in which the road extends, a filter section corresponding to the water storage part being provided on the first drainage channel, a filter device being arranged on the side of the filter section close to the water storage part, the water storage part comprising a filter layer and a water storage layer arranged in sequence along the second direction; the filter part of the filter device being in contact with part or all of the side surfaces of the filter layer in the second direction; the second direction being a direction parallel to the depth of the road.

Description

Technical Field

[0001] The present application relates to the field of road drainage, and in particular, to a drainage system and a drainage method thereof. Background Art

[0002] Road drainage generally collects the accumulated water on the road surface into the drainage ditch, and then flows into the sewage well and sewage water supply end through the drainage ditch, and finally discharged into nearby rivers, lakes, seas and other water bodies. The existing road surface water is generally rainwater, which is less polluted and easy to handle. Direct drainage is a waste of water resources. Now the road surface is often set as a permeable road surface, and the road surface water seeps into the underground for accumulation or is directed into a pool for storage. The method of infiltration into the underground for accumulation sometimes has the problem of untimely drainage due to the slow seepage rate. If the road surface water is directly directed into the pool for storage, the impurities and mud and sand carried in the water flow will accumulate in the pool, resulting in poor filtration effect, low efficiency, and inconvenient use of stored water. Summary of the invention

[0003] The present application aims to provide a drainage system and a drainage method thereof, which are used to solve the problem that the drainage rate and filtration storage of the road surface cannot be well balanced.

[0004] In a first aspect, in one embodiment of the present application, a drainage system is provided, comprising:

[0005] a first drainage channel, a second drainage channel and a water storage portion;

[0006] The positions of the second drainage channel, the first drainage channel and the water storage part are arranged in sequence according to the first direction, the second drainage channel is adjacent to the road, and the water inlet of the first drainage channel is connected to the flow path of the water accumulated on the road; the first drainage channel and the second drainage channel are separated by the partition part and connected through the overflow port at the top of the partition part, and the first direction is a direction perpendicular to the extension direction of the road on the horizontal plane;

[0007] The water storage parts are arranged at intervals in the direction in which the road extends, a filtering section corresponding to the water storage part is provided on the first drainage channel, a filtering device is arranged on the side of the filtering section close to the water storage part, and the water storage part includes a filtering layer and a water storage layer arranged in sequence along the second direction; the filtering part of the filtering device is in contact with part or all of the side of the filtering layer in the second direction; the second direction is a direction parallel to the depth of the road.

[0008] The drainage channel formed by the above-mentioned first drainage channel and second drainage channel has a first working state and a second working state. The first working state is mainly for filtration and supplemented by drainage. The water level in the first drainage channel is lower than the overflow port, and the water only flows in the first drainage channel. When the water flows through the filter part, it enters the filter layer of the water storage part from the filter part, and enters the water storage layer for storage after being filtered by the filter layer. The second working state is mainly for drainage and supplemented by filtration. When the water level in the first drainage channel exceeds the overflow port, the first drainage channel still retains the functions of drainage and filtration, but the water in the first drainage channel that exceeds the overflow port flows to the second drainage channel through the overflow port, so that the second drainage channel assists in draining away excess water, which refers to the water in the first drainage channel that has no time to be filtered, stored, or drained.

[0009] Through the above arrangement, the drainage system can take into account both a faster road drainage rate and a better filtering effect. The first drainage channel is mainly used for filtering; the second drainage channel is mainly used for auxiliary drainage.

[0010] The first drainage channel can be used as a temporary storage chamber for water flow, and road water flow can quickly enter the first drainage channel from the water inlet, alleviating the problem of road water accumulation due to untimely infiltration. At the same time, water flow can enter the filter layer from the first drainage channel for filtration and finally be stored in the water storage layer, and the amount of mud and sand entering the water storage layer is reduced, and the water flow that has not been filtered in time can flow downstream to prevent road water from accumulating and flooding locally. Compared with the drainage channel with only one unified flow channel in the prior art, the first drainage channel set separately reduces the flow area, so that the water level of the first drainage channel is higher, which is conducive to increasing the area of ​​the filter part covered by the water flow, improving the filtration efficiency, and achieving a better water storage effect; and the second drainage channel drains away excess water flow when the first drainage channel fails to drain or filter in time, preventing road water accumulation or flooding, and can further take into account the drainage rate and water flow filtration and storage problems. The present application can not only meet the better filtration effect, but also improve the road drainage rate and reduce the water accumulation on the road due to untimely infiltration.

[0011] In one embodiment of the present application, further, the flow cross-sectional area of ​​the first drainage channel is smaller than the flow cross-sectional area of ​​the second drainage channel. By setting the ratio of the flow cross-sectional area of ​​the first drainage channel to the second drainage channel to be less than 1, when the water volume is small and the filtration area needs to be increased, the first drainage channel can maintain a higher water level, which is further beneficial to filtration, and when the water volume is large and the drainage needs to be accelerated, the second drainage channel can greatly increase the drainage capacity, so as to take into account the drainage and filtration work in both states.

[0012] In one embodiment of the present application, further, a sand settling section is arranged upstream of each filtering section in the first drainage channel, and the sand settling section is arc-shaped in the direction of road extension, including relative concave side and convex side, the side wall of the concave side is recessed toward the outside of the first drainage channel, and the side wall of the convex side is protruding toward the inside of the first drainage channel; a recessed sedimentation portion is provided at the bottom of the first drainage channel, and the sedimentation portion is close to the convex side.

[0013] During the implementation process, some of the mud, sand and other granular impurities mixed in the water flow in the first drainage channel will enter the filter layer and remain in the filter layer. In the long run, it may reduce the filtration speed of the filter layer or even block the filter part, affecting the recycling of water. In order to improve the durability of the filter layer, reduce the maintenance frequency and maintenance cost, and further take into account the drainage rate and filtration efficiency, a sand settling section is set upstream of the filter section along the flow direction of the drainage channel. When the water flow mixed with impurities flows in the drainage channel, the particles with a density greater than that of water in the water flow are deposited in the sand settling section, which alleviates the problem of impurities blocking the filter part and the filter layer, and can also facilitate the cleaning of the drainage channel. By setting the first drainage channel at the sand settling section as an arc structure with a concave side and a convex side, when the water flows through the sand settling section, under the combined action of the centrifugal force of the water flow and the lateral pressure provided by the concave side and the convex side, the water flow easily forms a lateral circulation in the sand settling section. The lateral circulation brings the mud and sand and other particles with a density greater than water entrained in the water flow from the concave side to the convex side, and settles them in the sedimentation part close to the convex side, thereby reducing the high-density particles entrained in the water flow. By setting an arc-shaped sand settling section and a sedimentation part, the high-density particles entrained in the water flow are precipitated without affecting the drainage efficiency, further taking into account the drainage efficiency and filtration and water storage, and the structure of the sand settling section does not need to add other interception devices or power devices in the first drainage channel, which is green and energy-saving, and there is no need to consider the problem of device replacement or maintenance.

[0014] In one embodiment of the present application, further, the bottom of the first drainage channel bulges upward to form a blocking portion, the blocking portion is arranged around the edge of the sedimentation portion, and the blocking portion is provided with an opening toward the upstream. By providing a blocking portion at the bottom of the first drainage channel and using the blocking portion to surround the sedimentation portion, high-density particles are further blocked to prevent the high-density particles from flipping out of the sedimentation portion and flowing away under the action of the water flow, and an opening is provided toward the upstream of the blocking portion to reduce the obstruction of the blocking portion to the water flow, and also facilitate some high-density particles to directly enter the sedimentation portion for sedimentation. In the case of less obstruction to the water flow, the ability of the sand settling section to precipitate high-density particles is improved, and drainage efficiency and filtration and water storage are further taken into account.

[0015] In one embodiment of the present application, the road further includes a permeable pavement and a permeable base layer, and the second drainage channel is adjacent to the permeable base layer. By placing the permeable base layer of the road adjacent to the second drainage channel, at least part of the accumulated water on the road can infiltrate and accumulate in the soil. When the accumulation of the soil is limited, the water can also infiltrate from the upper permeable base layer into the second drainage channel and be discharged, so that the soil is always able to receive the infiltrating water flow, thereby helping to improve the drainage efficiency.

[0016] In one embodiment of the present application, further, the bottom of the first drainage channel is inclined toward the filter part at least at the filter section. By setting the bottom of the first drainage channel at the filter section to be inclined in a preset direction, it is easier for water to enter the filter part when flowing through the filter section, thereby improving the filtering efficiency and reducing the amount of water that cannot be filtered in time.

[0017] In one embodiment of the present application, the water storage layers of adjacent water storage units are further connected. When the water storage capacity of a water storage unit is saturated, the stored water can flow to other places to alleviate the problem of local flooding caused by excessive water volume.

[0018] In one embodiment of the present application, the drainage system further includes a water pipe, the water inlet end of the water pipe is located in the water storage layer, the water outlet end of the water pipe is connected to a drainage pipe, the drainage pipe is connected to the water supply pipe, wherein one end of the drainage pipe is connected to the water supply end of the water supply pipe, and the other end is connected to the water use end of the water supply pipe;

[0019] The drainage pipe is provided with a Venturi flow channel, which includes a tapered portion, a mixing portion and a gradually expanding portion which are sequentially connected from the water supply end to the water use end. The flow area of ​​the tapered portion decreases from the water supply end to the water use end, and the flow area of ​​the gradually expanding portion increases from the water supply end to the water use end. The water outlet end of the water delivery pipe is connected to the mixing portion.

[0020] The water in the aquifer is mainly filtered rainwater from the road surface, which can be used directly in some scenes with low requirements, such as green irrigation, landscape water flow and other scenes. The present application sets a drainage pipe with a venturi flow channel, and connects the drainage pipe between the water supply end and the water use end of the water supply pipe for daily water use, and sets the outlet end of the water pipe in the mixing part of the venturi flow channel. When using water, daily water flows from the water supply end to the water use end in the water supply pipe. When the water flow of daily water passes through the drainage pipe quickly, the tapered part of the venturi flow channel will produce a suction effect, and a negative pressure will be generated in the area. The negative pressure is transmitted to the mixing part, so that the water stored in the aquifer enters the mixing part from the outlet end of the water pipe under the action of the pressure difference, and the stored water is mixed with the daily water and flows out through the gradually expanding part.

[0021] By setting up a drainage pipe connecting the water transmission pipe and the water supply pipe, the water in the water storage layer can flow out naturally during daily water use, without the need to use power equipment to extract the stored water for use. This not only makes it convenient to use the stored water, but also saves energy consumption of the power equipment. It also allows the water storage layer to maintain a sustainable water storage state, so that the water storage layer and the filter layer are always in a usable state, rather than at the critical point of backflow to the drainage channel. While improving the convenience of use, it further takes into account the drainage rate and filtration capacity.

[0022] In one embodiment of the present application, further, a filter head is connected to the water inlet end of the water pipe, and the filter head is used to prevent particulate impurities from entering the water pipe. By connecting the filter head to the water inlet end of the water pipe, particulate impurities remaining in the stored water are further prevented from entering the water pipe or entering the water-using equipment connected to the water pipe, thereby improving the durability of the water pipe and other water-using equipment, reducing the blockage or other failures of the water pipe caused by particulate impurities, and further facilitating the use of stored water.

[0023] In a second aspect, in one embodiment of the present application, a drainage method based on the above drainage system is provided, which includes:

[0024] A first drainage channel, a second drainage channel and a water storage portion are provided on at least one side of the road;

[0025] The accumulated water on the road flows into the first drainage channel, enters the water storage part after being filtered in the filtering section of the first drainage channel, and is stored in the water storage layer after passing through the filtering layer of the water storage part;

[0026] When there is too much water on the road, the water flows into the first drainage channel. After the first drainage channel is filled, the water overflowing from the first drainage channel enters the second drainage channel through the overflow port, and the excess water is discharged from the second drainage channel.

[0027] The drainage method has a first working state mainly for filtration and a second working state mainly for drainage. In the first working state, water flows through the filtration section in the first drainage channel and enters the water storage part for filtration and storage. When the first drainage channel is full, it enters the second working state, and the first drainage channel still maintains drainage and filtration work, while the water flowing beyond the overflow port enters the second drainage channel for discharge, thereby taking into account both drainage rate and filtration effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0029] Figure 1A planar structural layout diagram of a drainage system provided in an embodiment of the present application;

[0030] Figure 2 for Figure 1 A magnified view of part I;

[0031] Figure 3 It is a structural schematic diagram of the sand settling section of the first drainage channel;

[0032] Figure 4 for Figure 3 Section III-III of the;

[0033] Figure 5 A schematic diagram of a section of a drainage system provided in an embodiment of the present application, viewed from above the road surface;

[0034] Figure 6 for Figure 5 V-V cross-section diagram;

[0035] Figure 7 for Figure 6 VI-VI cross-section diagram.

[0036] Icons: 100 - road; 200 - water storage part; 210 - filter layer; 211 - filter device; 220 - water storage layer; 221 - support structure; 310 - first drainage channel; 311 - connecting section; 312 - filter section; 313 - sand settling section; 3131 - concave side; 3132 - convex side; 3133 - blocking part; 3134 - sedimentation part; 320 - second drainage channel; 330 - partition; 331 - overflow; 400 - connecting pipe; 500 - water pipe; 510 - filter head; 600 - drainage pipe; 700 - cover plate. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0038] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0039] It should be noted that in the description of this application, it should be noted that if the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the drawings, or the orientation or position relationship in which the product of the application is usually placed when in use. It is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application. In addition, if the terms "first", "second", etc. appear in the description of this application, they are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0040] In addition, if the terms "horizontal" or "vertical" appear in the description of this application, it does not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. 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 can be slightly tilted.

[0041] In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0042] In the description of this application, the first direction refers to the direction perpendicular to the extension direction of the road on the horizontal plane; the second direction refers to the depth direction parallel to the road, that is, the direction perpendicular to the road surface and vertically downward.

[0043] Example 1

[0044] The present embodiment provides a drainage system for quickly draining away the pavement water flow of road 100, reducing the water accumulation on the road surface, and converging and filtering the water flow and storing it so that the stored water is easy to use. The road 100 has high drainage efficiency and good filtering effect, which solves the problem in the prior art that the drainage rate and filtering effect of the pavement cannot be taken into account at the same time.

[0045] Attached Figure 1 The plan structure layout of the drainage system is shown in FIG. Figure 2 Yes Figure 1 FIG. 1 is an enlarged view of part I in FIG. 1 , which shows a schematic structural diagram of the filtering section 312, the sand settling section 313 and the water storage section 200 of the first drainage channel 310; FIG. Figure 3 is a structural schematic diagram of the sand settling section 313; Figure 4 For attachment Figure 3The III-III cross-sectional view shows a cross-sectional schematic diagram of the sand settling section 313 in the flow direction; Figure 5 1 is a schematic plan view from above the road surface of the road 100, which shows a section of the drainage system including the water storage part 200; Figure 6 Yes Figure 5 , which shows a cross-sectional view of the filter section 312 of the drainage system in the vertical direction; Figure 7 yes Figure 6 VI-VI cross-sectional view, which shows a cross-sectional view of the filter section 312 of the drainage system in the horizontal direction.

[0046] Please refer to the attached Figure 1 and attached Figure 2 As shown, the drainage system includes: a road 100, a second drainage channel 320, a first drainage channel 310, a water storage part 200 and a water pipe 500 which are arranged in sequence in a first direction.

[0047] The second drainage channel 320 and the first drainage channel 310 are located underground and arranged in parallel with the road 100 to form a drainage channel for drainage. The second drainage channel 320 is adjacent to the road 100 , and the first drainage channel 310 is adjacent to the water storage part 200 .

[0048] The second drainage channel 320 and the first drainage channel 310 may be drainage ditches, such as the attached Figure 1 As shown, a cover plate 700 is provided on the upper part of the second drainage channel 320 and the first drainage channel 310, which is flush with or slightly lower than the road surface of the road 100, and a water inlet is provided on the cover plate 700 at the position corresponding to the first drainage channel 310. Figure 2 , Attachment Figure 6 and attached Figure 7 The first drainage channel 310 and the second drainage channel 320 are separated by the partition 330 to achieve flow separation. Further optionally, the flow area of ​​the first drainage channel 310 is smaller than the flow area of ​​the second drainage channel 320.

[0049] The top of the partition 330 is provided with an overflow port 331, and the overflow port 331 is connected to the first drainage channel 310 and the second drainage channel 320. Figure 6 and attached Figure 7 As shown in FIG. 1 , the overflow port 331 is disposed at the partition 330 close to the road surface of the road 100 .

[0050] Furthermore, the first drainage channel 310 includes a filter section 312 that flows through the water storage part 200, and a filter device 211 is provided at the filter section 312, and the filter part of the filter device 211 is attached to and connected to the water storage part 200. Optionally, the filter device 211 provided on the side wall of the filter section 312 is a grille, and the filter part is the part of the grille through which water passes.

[0051] Please refer to the attached Figure 5 and attached Figure 6 The water storage part 200 is arranged underground, and the water storage part 200 includes a filter layer 210 and a water storage layer 220. The filter layer 210 and the water storage layer 220 are arranged in a direction away from the ground. The filter layer 210 is relatively close to the ground, and the water storage layer 220 is relatively far from the ground. The filter layer 210 and the water storage layer 220 have an interface. Compared with the bottom of the first drainage channel 310, the interface is on the same horizontal plane or farther from the ground. That is to say, the filter part is in contact with part or all of the side surfaces of the filter layer 210 in the second direction.

[0052] The water storage section 200 may be one or multiple water storage sections 200 spaced apart along the extending direction of the road 100. When there are multiple water storage sections 200, the first drainage channel 310 also has multiple filter sections 312. The water storage layers 220 of adjacent water storage sections 200 may be optionally connected by a connecting pipe 400. When the water storage volume of a particular water storage section 200 is saturated, the water storage volume may flow to other places, thereby alleviating the problem of excessive water volume in a certain area being unfavorable for drainage.

[0053] In order to facilitate the output of water, the drainage system may further include a water pipe 500, the water inlet end of the water pipe 500 extends into the water storage layer 220, and the water outlet end of the water pipe 500 is connected to the water-using equipment.

[0054] The principle of the drainage unit provided in this embodiment is as follows:

[0055] The road surface water flows into the first drainage channel 310 through the water inlet. The first drainage channel 310 can be used as a temporary storage chamber for the water flow. The filtering and infiltration site is transferred to the first drainage channel 310. The first drainage channel 310 is provided with a filter section at the filter section 312. When the road surface water flows through the filter section, it enters the filter layer 210 of the water storage section 200 from the filter section, and enters the water storage layer 220 for storage after being filtered by the filter layer 210. The filter layer 210 intercepts particulate impurities such as mud and sand in the water flow, reduces the amount of mud and sand entering the water storage layer 220, and alleviates the problem of mud and sand accumulation in the water storage layer 220. When needed, the stored water in the water storage layer 220 can be output through the water pipe 500. It can not only alleviate the problem of road surface waterlogging caused by untimely infiltration, but also have sufficient filtering time to improve the filtering effect.

[0056] The drainage channel formed by the first drainage channel 310 and the second drainage channel 320 has a first working state mainly for filtering and a second working state mainly for drainage.

[0057] First working state: the amount of road water flow is small, and the water level in the first drainage channel 310 is lower than the overflow port 331 .

[0058] The water flows into the first drainage channel 310 through the water inlet, and the water flows only in the first drainage channel 310. When the water flows through the filter section 312, it enters the filter layer 210 through the filter part, and is finally stored in the water storage layer 220 after being filtered by the filter layer 210. The water that has not been filtered in time in the first drainage channel 310 can flow downstream, alleviating the situation where the water accumulates in one place, and further improving the drainage rate on the road surface, so that the drainage rate is taken into account when filtering is the main method. The flow area of ​​the first drainage channel 310 is relatively small, so that a relatively high water level is maintained in the first drainage channel 310, so that the contact area between the water flow and the filter part is larger, the area for filtering work at the filter part is increased, the efficiency of filtering is improved, and the water that has not been filtered in time flows downstream. Therefore, the first working state improves the filtering efficiency without affecting the drainage to ensure that filtering is the main method.

[0059] Second working state: when the amount of water is large or the water storage part 200 is saturated, the water level of the first drainage channel 310 exceeds the overflow port 331 .

[0060] Water flows through the water inlet into the first drainage channel 310, and water that exceeds the overflow port 331 flows through the overflow port 331 into the second drainage channel 320 for drainage, thereby reducing the drainage load of the first drainage channel 310, while water that is below the overflow port 331 still flows in the first drainage channel 310, and enters the filter layer 210 through the filter section when flowing through the filter section 312, and is finally stored in the water storage layer 220 after being filtered by the filter layer 210, while water that has not been filtered in time can flow downstream. Therefore, in the case of a large amount of water, the second working state is mainly based on drainage efficiency, and does not affect the filtration and water storage.

[0061] The adaptive adjustment and switching of the above two working states enables the drainage unit provided in this embodiment to achieve a balance between drainage efficiency and filtering and water storage capacity, taking into account both drainage rate and filtering and water storage capacity without consuming more energy, which is environmentally friendly, green and energy-saving.

[0062] In order to further facilitate the use of water stored in the water storage layer 220, optionally, the above-mentioned water supply pipe 500 is connected to the drainage pipe 600, which is arranged between the water supply pipes, one end of which is connected to the water supply end of the water supply pipe and the other end is connected to the water use end of the water supply pipe.

[0063] As attached Figure 1 and 2 As shown, the drainage pipe 600 is provided with a Venturi flow channel, which includes a tapered portion, a mixing portion and a gradually expanding portion which are sequentially connected from the water supply end to the water use end. The flow area of ​​the tapered portion decreases along the direction from the water supply end to the water use end, and the flow area of ​​the gradually expanding portion increases along the direction from the water supply end to the water use end. The water outlet end of the water delivery pipe 500 is connected to the mixing portion.

[0064] Daily water flows from the water supply end to the water use end. When the water flow of daily water passes through the drainage pipe 600 rapidly, the tapering part of the Venturi flow channel will produce a suction effect and generate negative pressure in the area. The negative pressure is transmitted to the mixing part, so that the stored water in the water storage layer 220 enters the mixing part from the water outlet end of the water pipe 500 under the action of the pressure difference, and the stored water is mixed with the daily water and flows out through the gradually expanding part.

[0065] In this embodiment, the water stored in the water storage layer 220 is mainly rainwater on the road 100, which can generally be used in scenes such as greening irrigation, landscape water flow, road cleaning, etc. When using daily water, the drainage pipe 600 allows the water stored in the water storage layer 220 to flow out through the water delivery pipe 500, and there is no need to use power equipment to extract the stored water for use, saving power equipment energy consumption, which can not only reduce the consumption of daily water such as tap water, but also facilitate the use of stored water, and also enable the water storage layer 220 to maintain a sustainable water storage state, so that the water storage layer 220 and the filter layer 210 are always in a usable state, rather than in a state of counterflow to the first drainage channel 310, while improving the convenience of use, further taking into account the drainage rate and filtering capacity.

[0066] When the total amount of water stored in the water storage layer 220 is insufficient for use, the drainage pipe 600 is connected to the water supply pipe so that only daily water such as tap water can be used, thereby avoiding the limitation of additional use functions extended from the drainage system due to insufficient water storage.

[0067] Furthermore, the water inlet end of the water pipe 500 is optionally provided with a filter head 510 to prevent particulate impurities from entering the water pipe 500. The filter head 510 can be a filter screen or ultrafiltration membrane provided at the water inlet end of the water pipe 500, or can also be other filtering devices.

[0068] The surface layer of the water storage part 200, that is, the upper part of the filter layer 210, can be idle land, sidewalks, green vegetation on both sides of the road 100, or buildings or structures. The contact surface between the lower water storage layer 220 and the soil body can be optionally provided with a low permeability layer, such as a concrete layer, an epoxy resin layer, etc. The pore size of the filter layer 210 can be optionally set to gradually decrease from the ground to the water storage layer 220, so that the water permeability is high near the ground and the permeability of particles far from the ground is low. When the water volume is not large, the filter layer 210 can quickly absorb the water flow without affecting the filtering effect.

[0069] In order to better drain the top surface of the aquifer, the sidewalk can be paved with permeable bricks or set as a permeable concrete hardened road surface. In order to better meet the strength requirements of the building or structure for the foundation, the aquifer 220 can be filled with a porous support structure 221. The above-mentioned support structure 221 can be any structure that has high strength and good durability underwater.

[0070] In this embodiment, a support structure 221 is provided for improving the strength of the water storage layer 220. Figure 2 The supporting structure 221 includes a plurality of PVC tubes, and the tube body has a channel along the axial direction. The plurality of PVC tubes are staggered to form a spatial mesh structure, that is, the cross-section of the mesh structure taken from any direction is mesh-shaped, and the PVC tubes are connected at the connection nodes, so that the channels of the tube bodies are connected, and hardened high-strength impermeability concrete is provided in the channels. The high-strength impermeability concrete structure is to pour the concrete mixture from the channel of any tube body and fill the above-mentioned spatial mesh structure. Under the constraint provided by the PVC tube body, the high-strength impermeability concrete mixture forms a concrete structure with high strength in the spatial mesh structure. After the concrete structure is formed, it supports the tube wall of the tube body to enhance the geometric stability of the tube body and improve the bearing capacity of the tube body; and the inner wall of the tube body continues to provide lateral constraints to the formed concrete structure to alleviate the situation where the concrete structure generates internal microcracks due to stress. The pipe body and the concrete structure are combined and complement each other to form a spatial network structure with high strength and good underwater durability. There are few mobile particles in the structure. Compared with the backfill soil layer with strength verification or the compacted soil with small porosity, the support structure 221 provided in this embodiment has the advantages of high strength, good durability, large porosity and strong water storage capacity, and there are few particles mixed in the water, which is easy to use.

[0071] Furthermore, the pavement of road 100 can be optionally set as a permeable pavement and the base layer can be set as a permeable base layer. While the surface water of road 100 is discharged to the first drainage channel 310, part of it can also directly seep through the permeable pavement and the permeable base layer and accumulate in the soil. When the accumulation capacity of the soil is limited, the water can also seep into the second drainage channel 320 from the permeable base layer and be discharged, so that the soil can continue to receive pavement seepage water, thereby accelerating the drainage efficiency.

[0072] Example 2

[0073] Some of the granular impurities such as mud and sand mixed in the water flow and having a density greater than that of water will enter the filter layer 210 and remain therein, which may reduce the porosity of the filter layer 210 and affect the filtration speed in the long run. In order to alleviate this situation, the inventor further provides a sand settling section 313 upstream of the filter section 312 in the first drainage channel 310 on the basis of Example 1, as shown in the attached figure. Figure 1 and attached Figure 2 The sand settling section 313 is used to deposit granular materials such as mud and sand in the water flow.

[0074] The first drainage channel 310 is also provided with a connecting section 311. Figure 1 and attached Figure 2As shown, the connecting section 311 is located between the above-mentioned filtering sections 312 and sand settling sections 313, so as to prevent the water that cannot be filtered in time from gathering and overflowing in one filtering section 312, so that the water that cannot be filtered in time can be discharged in time, thereby improving the overall filtering and water storage capacity along the road 100.

[0075] Please refer to the attached Figure 2 As shown, the sand settling section 313 is used to pre-exclude some high-density granular materials upstream of the filter section 312. This part of the granular materials is easy to enter the water storage section 200, which may easily cause the filtration speed of the filter layer 210 of the water storage section 200 to decrease over time. Therefore, the sand settling section 313 is provided to reduce the load of the filter section 312, reduce the amount of mud and sand flowing through the filter section 312, and improve the durability of the filter layer 210 of the water storage section 200. The above-mentioned sand settling section 313 can be optionally provided as a plurality of sections upstream of the filter section 312, so as to achieve a multi-stage sand settling effect, and the particle size or density of the particulate matter deposited in each sand settling section 313 may be different. For example, see the attached Figure 2 and attached Figure 3 In this embodiment, two sand settling sections 313 are provided.

[0076] Please refer to the attached Figure 2 and attached Figure 3 The first drainage channel 310 is arc-shaped at the sand settling section 313, and the sand settling section 313 includes a concave side 3131 and a convex side 3132 opposite to each other, the side wall of the concave side 3131 is concave toward the outside of the first drainage channel 310, and the side wall of the convex side 3132 is convex toward the inside of the first drainage channel 310; and refer to the attached Figure 4 The bottom of the first drainage channel 310 is provided with a concave deposition portion 3134, and the deposition portion 3134 is close to the convex side 3132. The arc bending direction of the sand settling section 313 is not uniquely fixed, that is, the concave side 3131 and the convex side 3132 can be interchanged. For example, in this embodiment, see the attached Figure 3 The two sand settling sections 313 are connected to form an S shape. When the distance between the sand settling section 313 and the filtering section 312 is close, the sand settling section 313 can be optionally configured such that the water outlet direction of the arc portion faces the side wall of the filtering section 312 provided with the filtering device 211, that is, the filtering device 211 faces the direction of the water flow as much as possible, thereby increasing the filtering water pressure and improving the filtering efficiency.

[0077] The principle of the arc-shaped sand settling section 313 is as follows:

[0078] Attached Figure 3 The dotted arrow in the figure shows the direction of the water flow. When the water flows through the sand settling section 313, due to the combined effect of the centrifugal force and the lateral pressure provided by the side wall of the first drainage channel 310, the water flow easily forms a lateral circulation in the arc-shaped sand settling section 313. Figure 4The dotted arrows in the figure show the direction of the lateral circulation, which brings the high-density particles carried in the water flow from the concave side 3131 from the bottom of the first drainage channel 310 to the convex side 3132, and settles them in the sedimentation section 3134 near the convex side 3132, thereby reducing the high-density particles carried in the water flow. The sand settling section 313 and the sedimentation section 3134 settle the high-density particles carried in the water flow without affecting the drainage efficiency, further taking into account the drainage efficiency and filtration and water storage, and the structure of the sand settling section 313 does not need to add other interception devices or power devices in the first drainage channel 310, which is green and energy-saving, and there is no need to consider the problem of device replacement or maintenance, and the maintenance difficulty is small and the cost is low.

[0079] In particular, based on the first embodiment, the first drainage channel 310 has a smaller flow area, so that the water level is always high, it is easier to form a lateral circulation, and the sand settling section 313 and the filtering section 312 can play a better role.

[0080] Moreover, if the drainage culvert in the prior art is blocked, it is generally difficult to confirm the blockage position, and the difficulty of investigation is great. Moreover, when the drainage culvert needs to be dredged regularly due to the deposition of mud and sand, it is generally necessary to excavate and dredge it comprehensively, which consumes a lot of manpower and material resources. The deposition part 3134 provided in this embodiment is the main mud and sand deposition area in the first drainage channel 310, which is conducive to the regular and fixed-point dredging of the first drainage channel 310, and is conducive to the investigation of the blockage position of the first drainage channel 310, with low maintenance difficulty and low maintenance cost. The above-mentioned sand settling section 313 is at least arranged in the first drainage channel 310, and can also be arranged in the second drainage channel 320 where the filtering section 312 is not arranged, so as to concentrate the mud and sand and other materials deposited in the second drainage channel 320.

[0081] Optionally, a blocking portion 3133 is provided in the sand settling section 313 for further blocking high-density granular materials, see the attached Figure 7 The blocking portion 3133 is a protrusion extending upward from the bottom of the first drainage channel 310. The protrusion is arranged around the edge of the sedimentation portion 3134 and is provided with an opening toward the upstream direction. The blocking portion 3133 is used to increase the difficulty of high-density particles such as mud and sand to flow over the sedimentation portion 3134. The blocking portion 3133 opens toward the upstream to reduce the obstruction to the water flow, and can also facilitate some mud and sand to directly enter the sedimentation portion 3134 for sedimentation, taking into account both drainage efficiency and filtration.

[0082] Further optionally, the bottom of the first drainage channel 310 is inclined toward the location of the filter part at least at the filter section 312. When water flows through the filter section 312, since the bottom of the first drainage channel 310 is inclined toward the filter layer 210 at this location, the water flows more easily toward the filter part, thereby improving the filtering efficiency and reducing the water flow that cannot be filtered in time.

[0083] Alternatively, please refer to the attached Figure 5 The first drainage channel 310 is bent at the filter section 312 so that the filter device 211 provided in the filter section 312 faces the direction of the water flow, thereby increasing the water pressure acting on the filter device 211 and the filter layer 210, and further improving the filtering efficiency without affecting the drainage.

[0084] Example 3

[0085] This embodiment provides a drainage method, in which a first drainage channel 310 , a second drainage channel 320 , and a water storage part 200 are arranged on at least one side of a road 100 ;

[0086] The accumulated water on the road 100 flows into the first drainage channel 310, enters the water storage part 200 after being filtered in the filtering section 312 of the first drainage channel 310, and is stored in the water storage layer 220 after passing through the filtering layer 210 of the water storage part 200;

[0087] When there is too much water on the road 100 , the water flows into the first drainage channel 310 . After the first drainage channel 310 is filled, the water overflowing from the first drainage channel 310 flows into the second drainage channel 320 through the overflow port 331 , and the excess water is discharged from the second drainage channel 320 .

[0088] The drainage method has a first working state mainly for filtration and a second working state mainly for drainage. In the first working state, water flows through the filtration section 312 in the first drainage channel 310 and enters the water storage part 200 for filtration and storage. When the first drainage channel 310 is full, it enters the second working state, and the first drainage channel 310 still maintains drainage and filtration operations, while the water flowing beyond the overflow port 331 enters the second drainage channel 320 for drainage, thereby taking into account both drainage rate and filtration effect.

[0089] In the above-mentioned first drainage channel 310 and second drainage channel 320, at least the first drainage channel 310 includes a sand settling section 313, which is arranged upstream of the filtration section 312. When the water flows through the sand settling section 313, the mud and sand and other particulate matter with a density greater than water entrained in the water flow is deposited in the concave sedimentation portion 3134 at the bottom of the sand settling section 313.

[0090] The above are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A drainage system, arranged on at least one side of a road, characterized in that: It includes a first drainage channel, a second drainage channel and a water storage part; The positions of the second drainage channel, the first drainage channel and the water storage part are arranged in sequence according to a first direction, the second drainage channel is adjacent to the road, and the water inlet of the first drainage channel is connected to the flow path of the water accumulated on the road; the first drainage channel and the second drainage channel are separated by a partition and connected through an overflow port at the top of the partition, and the first direction is the cross-sectional direction of the road; The water storage parts are arranged at intervals in the direction in which the road extends, the first drainage channel is provided with a filter section corresponding to the water storage part, the filter section is provided with a filter device near the side of the water storage part, the water storage part includes a filter layer and a water storage layer arranged in sequence along the second direction; the filter part of the filter device is in contact with part or all of the side surface of the filter layer in the second direction; the second direction is a direction parallel to the depth of the road; A sand settling section is arranged upstream of each filtering section in the first drainage channel, the sand settling section is arc-shaped in the direction in which the road extends, and includes a concave side and a convex side opposite to each other, the side wall of the concave side is concave toward the outside of the first drainage channel, and the side wall of the convex side is convex toward the inside of the first drainage channel; a concave settling portion is arranged at the bottom of the first drainage channel, and the settling portion is close to the convex side; The bottom of the first drainage channel is provided with a blocking portion protruding upward, the blocking portion is arranged around the edge of the sedimentation portion, and the blocking portion is provided with an opening facing upstream; The flow cross-sectional area of ​​the first drainage flow channel is smaller than the flow cross-sectional area of ​​the second drainage flow channel, so that the water level of the water flow is always high, so as to easily form a lateral circulation.

2. The drainage system according to claim 1, characterized in that: The road includes a permeable pavement and a permeable base layer, and the second drainage channel is adjacent to the permeable base layer.

3. The drainage system according to claim 1, characterized in that: The bottom of the first drainage channel is inclined toward the filter portion at least at the filter section.

4. The drainage system according to claim 1, characterized in that: The water storage layers of adjacent water storage parts are connected.

5. The drainage system according to claim 1, characterized in that: It also includes a water pipe, the water inlet end of the water pipe is located in the water storage layer, the water outlet end of the water pipe is connected to a drainage pipe, the drainage pipe is connected to a water supply pipe, one end of the drainage pipe is connected to the water supply end of the water supply pipe, and the other end is connected to the water use end of the water supply pipe; The drainage pipe is provided with a Venturi flow channel, and the Venturi flow channel includes a tapered portion, a mixing portion and a gradually expanding portion which are sequentially connected from the water supply end to the water use end. The flow area of ​​the tapered portion decreases along the direction from the water supply end to the water use end, and the flow area of ​​the gradually expanding portion increases along the direction from the water supply end to the water use end. The water outlet end of the water delivery pipe is connected to the mixing portion.

6. The drainage system according to claim 5, characterized in that: The water inlet end of the water pipe is connected with a filter head, and the filter head is used to prevent particulate impurities from entering the water pipe.

7. A drainage method using the drainage system according to any one of claims 1 to 6, characterized in that: include: A first drainage channel, a second drainage channel and a water storage portion are provided on at least one side of the road; The accumulated water on the road flows into the first drainage channel, enters the water storage part after being filtered in the filtering section of the first drainage channel, and is stored in the water storage layer after passing through the filtering layer of the water storage part; When there is too much water on the road, the water flows into the first drainage channel. After the first drainage channel is filled, the water overflowing from the first drainage channel enters the second drainage channel through the overflow port, and the excess water is discharged from the second drainage channel.

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