Self-cleaning roads and bag-type dust drainage ditches

Abstract

Self-cleaning roads have bag-type dust collection and drainage ditches set on the edges. The bag-type dust collection and drainage ditches include a bag opening, a bag throat, a bag neck and a bag belly. The four are connected in sequence, and their horizontal horizontal line heights decrease in sequence; the bag opening faces the center of the road surface and is flush with or slightly lower than the road surface, and the bag opening is connected along the direction of the road; there is a narrow part between the bag opening and the bag neck, which is the bag throat; the pulse airflow carries dust into the bag opening, and accelerates due to narrowing when passing through the bag throat, resulting in a decrease in nearby pressure, further adsorbing dust from the air near the bag opening and the road surface, accelerating to the bag neck, rapidly changing direction at the bag neck, and depositing in the bag belly.

Description

Technical Field

[0001] The self-cleaning road and bag-type dust collection drainage ditch of the present invention relate to an urban road drainage ditch that utilizes natural wind, traffic cyclones and rainwater to automatically clean the road, reduce road dust and road water accumulation, and belong to the field of urban road construction. Background Art

[0002] According to the paper "Experimental Study on Factors Affecting Road Dust Generated by Motor Vehicles," published in Volume 33, Issue 12 of "Environmental Science and Management" (December 2008), motor vehicle fuel combustion contributes 34-40% of PM10 particulate matter pollution in urban areas, while road dust contributes 30-50%. This means that 64-90% of urban PM10 pollution originates on roads, which typically account for 10% of a city's surface area. Therefore, addressing road dust will ultimately address PM10 air pollution.

[0003] Combined with the above papers, Figure 1 This shows that the greater the road dust load, the higher the PM10 concentration in the ambient air; Figure 2 This indicates that the closer to the emission source, the higher the PM10 concentration in the air. This suggests that road design should be able to automatically reduce the dust load on the road, making the road self-cleaning. Secondly, to reduce the dust load on the road, facilities that absorb particles of various sizes should be installed as close to the center of the road as possible.

[0004] There are generally four types of existing roads. One type is open roads, such as Figure 5 Type A roads have a self-cleaning function. Natural wind, traffic vortexes and rainwater automatically clean the road (hereinafter referred to as pulse airflow), automatically removing dust from the road surface and depositing it on the earthen shoulders and road ditches. The second type is a closed road, such as Figure 6 , F-type road, the road surface 2, the sidewalk 7 and the curb 6 form a trough, like a grinding trough, the car 1 is the grinder, and the dust on the road surface is the abrasive. This type of road cannot discharge road dust and particulate matter by itself. The road dust load is stable. If it is not cleaned manually by machinery, it will cause very serious PM10 pollution.

[0005] In view of the defects of the second type of road, an improved type has emerged in the prior art, which is a semi-open road, such as Figure 7 , C-type road, open-air drainage ditches 80 are set on both sides of the road surface 2 to form drainage ditches 80c, and the drainage ditches 80c are covered with iron grid covers 80a. Figure 5The described road has similar performance and is self-cleaning. Dust on the road can be automatically removed by wind, car cyclones and rain, and deposited in the gutter 80. However, this type of road is rare because various problems with the iron grille cover easily pose a safety hazard.

[0006] In order to solve the defects of the second type of road, a second improved type has emerged in the existing technology. Figure 8 For a D-type road, semi-open drainage ditches 81 are set on both sides of the road surface 2 to form drainage grooves 81c and open openings 81a. The drainage grooves 81c are formed in one step using resin concrete, serving as both drainage ditches and curbstones. In this way, dust on the road can be automatically removed by wind, car vortexes, and rainwater, and deposited in the drainage grooves 81c. In this type of road, since the open openings 81a face upward, the space 81b contained in the drainage grooves 81c is directly exposed to external convection. In addition, the pulsed airflow generated by wind and car vortexes carries dust mainly in a horizontal direction, which affects its ability to actively absorb dust. In addition, due to the large squeezing force of the curbstones 5, the space 81b contained in the drainage grooves 81c is generally small and shallow. Under the action of the pulsed airflow, a static layer cannot be formed in the drainage grooves 81c, which is not conducive to the deposition of PM10 particles and has limited ability to reduce the dust load on the road.

[0007] In order to solve the defects of the second type of road, a third improved type has emerged in the existing technology. Figure 9 、 Figure 10 For an E-shaped road, drainage ditches 82 are provided on both sides of the road surface 2, forming drainage grooves 82c and openings 82a facing the road surface. 82c is formed using resin concrete in one step, with a large internal cavity 82b, serving as both a drainage ditch and a curbstone. Dust on the road is deposited in the drainage ditches 82 through the openings 82a facing the road surface under the influence of wind, vehicle vortexes, and rain. Due to the relatively small area of the openings 82a facing the road surface, the pulsed airflow's ability to reduce the dust load on the road is limited. Rainwater is slightly more effective at reducing the dust load, but the effect is very poor when it is not raining.

[0008] Figure 3 This is a graph showing the change in dust load over time for six types of roads: A, B, C, D, E, and F. The initial road dust load is the same, 0.2 kg / m2. Under the same other conditions and after 4 hours, the dust loads for the six types of roads: A, B, C, D, E, and F are 0.05 kg / m2, 0.08 kg / m2, 0.09 kg / m2, 0.14 kg / m2, 0.15 kg / m2, and 0.19 kg / m2, respectively. Figure 4 The PM10 concentrations of the six road types were measured 4 hours later and were 0.44 mg / m3 ,0.51mg / m 3 , 0.55mg / m 3 ,0.70mg / m 3 , 0.74mg / m 3 ,0.84mg / m 3 It can be seen that the present invention is self-cleaning road, Figure 11 One of the advantages of Type B roads is that compared with Type F roads, the dust load is automatically reduced by about 60%, and the corresponding PM10 emission concentration is reduced by about 40%.

[0009] Another advantage of the present invention is that it reduces the intensity of mechanical or manual road cleaning, saving money for the municipality.

[0010] Another advantage of the present invention is that it can effectively reduce road water accumulation compared to F-type roads and effectively improve safety compared to C-type roads.

[0011] The bag-type dust collection drainage ditch of the present invention has the characteristics of convenient construction, large bearing capacity, convenient maintenance, etc. under the condition of ensuring safety. Summary of the Invention

[0012] The purpose of the present invention is to design a road with self-cleaning function, especially an urban road that uses natural wind, traffic cyclones and rainwater to automatically clean the road, and automatically collects and removes dust; another purpose is to provide a bag-type dust collection and drainage ditch for the road that is easy to construct and maintain.

[0013] Problems to be solved by the present invention:

[0014] 1. When a car passes through the road surface, the front of the car first compresses the air. The compressed airflow carries dust and has an impact force on the curbstones on the side of the road, generating positive pressure on the curbstones. After the car passes, the airflow moves forward, the pressure decreases, and negative pressure is generated on the curbstones. At this time, a bag dust drainage ditch is set at the curbstone position to collect the pulse airflow carrying dust and allow the dust to be deposited in the bag dust drainage ditch; and when the negative pressure is generated after the car passes, the bag dust drainage ditch must be optimized for airflow design to prevent the dust and PM10 particles in the bag dust drainage ditch from being adsorbed by the negative pressure and flowing back to the road as much as possible. This is what the present invention needs to solve. The positive pressure generated by natural wind blows the road dust into the bag dust drainage ditch. Its action mechanism is the same as that of the wind caused by the car, and the negative pressure action mechanism it generates is also the same.

[0015] 2. Use rainwater to flush road dust into bag-type dust collection drains as much as possible, and flush the sediment in the bag-type dust collection drains into the sand settling well.

[0016] 3. The bag-type dust drainage ditch must be durable. The protruding road surface part that acts as a curbstone is a vulnerable part and must be easily replaced.

[0017] The specific embodiments of the present invention are described in detail below.

[0018] The self-cleaning road of the present invention includes a road surface for motor vehicles to travel on, curbstones arranged on both sides of the road surface, and paving stones for transitioning the curbstones to the road surface. In scheme one, bag-type dust collection and drainage ditches are arranged on both sides of the road surface. The bag-type dust collection and drainage ditches include a bag opening, a bag throat, a bag neck, and a bag belly. The four are connected in sequence, and the average horizontal line heights decrease in sequence; the bag opening faces the center of the road surface and is flush with or slightly lower than the road surface, and it is connected along the direction of the road; there is a narrowest part between the bag opening and the bag neck, which is the bag throat. The pulse airflow carries dust and enters from the bag opening. When passing through the bag throat, it is accelerated due to narrowing, resulting in a decrease in nearby pressure, further adsorbing dust in the air near the bag opening and on the road surface and accelerating toward the bag neck, rapidly changing direction at the bag neck, and depositing in the bag belly.

[0019] The pocket opening is defined as the space above the horizontal line Y at the right edge of the lower solid portion of the pocket opening 8a, to the left of the vertical line X at the rightmost solid portion of the lower solid portion of the pocket opening, and encompassed by the downward projection of the solid portion above the pocket opening. The pocket opening faces the center of the road surface. A larger h indicates a greater amount of pulsed airflow and dust received.

[0020] The bag belly is defined as follows: The lowest point of any beam projected from outside the bag opening into the interior of the bagged dust drain is the Z-demarcation line. The space below the Z-demarcation line and the solid body is the bag belly. The bag belly is minimally disturbed by the pulsed airflow, forming a stable area suitable for dust deposition and settling.

[0021] The bag neck is defined as the space above the Z dividing line and below the Y dividing line. This area is the main turbulent area, where dust particles rely on inertial motion to impact downward.

[0022] The bag pharynx is defined as the space above the Y dividing line and to the right of the X dividing line. The bag pharynx includes the narrowest section, dimensioned a, where the pulsed airflow accelerates, accelerating dust absorption at the bag opening. Sometimes the bag pharynx and bag neck are combined into one.

[0023] Preferably, the area of the bag belly should be greater than or equal to the sum of the areas of the bag mouth, bag pharynx, and bag neck.

[0024] Option 2: In Option 1, the dimension A of the solid part above the bag opening and to the left of the X dividing line extending along the shoulder toward the center of the road is greater than or equal to 0.

[0025] Option 3: In Option 1, the height H along the shoulder is constituted as a road curb.

[0026] Option 4: In option 1, the bag opening diameter h is larger than the bag pharyngeal diameter a, and then increases along the bag neck to the widest size at the bag belly.

[0027] Option 5. In Option 1, 2, 3 or 4, a certain water level is set in the bag belly, and the accumulated water after rain can be maintained for a period of time, which is conducive to the adsorption of PM10 particles and even PM2.5 particles in the air. It can also prevent and reduce the sediment in the bag-type dust collection drainage ditch from returning to the air under the action of pulsating airflow.

[0028] Option six, the present invention provides a bag-type dust collection drainage ditch, which is composed of a drainage ditch and a ditch cover plate arranged at the edge of the road. The two ditch walls and the ditch bottom of the drainage ditch are asymmetrically U-shaped, the top of the long end ditch wall is flush with the road surface or road level stone, and the ditch cover plate is inclined at the top of the short end ditch wall, and at least one positioning column is provided on the lower bottom surface of the ditch cover plate. In this way, the ditch cover plate and the drainage ditch form a bag mouth, a bag throat, a bag neck and a bag belly, which are used to absorb and collect deposited road dust and road drainage. The part of the ditch cover plate higher than the road surface acts as a curbstone.

[0029] In Option 7 and Option 6, after the trench cover is positioned and installed, the trench cover is positioned and installed relying on the positioning columns, and then fixed to the top of the short end trench wall with cast-in-place concrete mortar.

[0030] In Plan 8, Plan 6 or 7, the drainage ditch is cast in place with concrete, or built with brick-concrete, or built with stone concrete, or prefabricated concrete is formed and then fixed during construction.

[0031] Option 9: In Option 6 or 7, the trench cover is a prefabricated plate, particularly a fiber-steel or fiberglass reinforced concrete prefabricated plate. In this method, the trench cover is the only wearable part, and it can be replaced while maintaining the integrity of the drainage trench.

[0032] Option 10. The present invention provides a bag-type dust collection drainage ditch, which is composed of a drainage ditch and a ditch cover arranged at the edge of the road. The left ditch wall of the drainage ditch extends to the upper right to cover most of the drainage ditch, and the right ditch wall of the drainage ditch is lower than the left ditch wall. A "7"-shaped ditch cover is erected on the right ditch wall. At least one positioning column is fixedly provided on the left side of the ditch cover and is offset against the upper extension section of the water storage ditch. In this way, the ditch cover and the drainage ditch form a bag mouth, a bag neck and a bag belly, which are used for absorbing, collecting and depositing road dust and road drainage. The part of the ditch cover that is higher than the road surface acts as a curbstone.

[0033] In Plan 11 and Plan 9, the drainage ditch and the trench cover are both prefabricated with concrete. Since the trench cover is a wearing part, the trench cover can be replaced while maintaining the integrity of the drainage ditch. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 This is a graph showing the relationship between the measured PM10 particle concentration and road dust load when the car is traveling at a speed of 50 km / h and at distances of 5m, 10m, and 15m from the road.

[0035] Figure 2 This is a graph showing the relationship between the measured PM10 particle concentration and the distance from the road at different distances under the conditions of a car speed of 50 km / h and a road dust load of 0.2 kg / m2.

[0036] Figure 3 This graph shows the relationship between road dust load and time, measured at a distance of 5 meters from the center of the road, at a wind speed of 2-3 m / s and a one-way traffic volume of 1200 / h. A, B, C, D, E, and F represent six road types.

[0037] Figure 4 is based on Figure 3 The PM10 emission concentrations corresponding to the dust loads of the six types of roads A, B, C, D, E, and F after 4 hours. Figure 3 The conditions are the same.

[0038] Figure 5 It is a schematic diagram of the A-type road structure in the prior art.

[0039] Figure 6 It is a schematic diagram of the F-type road structure in the prior art.

[0040] Figure 7 It is a schematic diagram of the C-type road structure in the prior art.

[0041] Figure 8 It is a schematic diagram of the D-type road structure in the prior art.

[0042] Figure 9 It is a schematic diagram of the E-type road structure in the prior art.

[0043] Figure 10 yes Figure 9 Enlarged structural diagram of the integrated drainage ditch

[0044] Figure 11 It is a schematic diagram of the B-type road structure of the present invention.

[0045] Figure 12 yes Figure 11 Enlarged view of view C in the middle, analysis of the main structure.

[0046] Figure 13 yes Figure 11 The enlarged view of view C in the middle shows the working principle of pulsed airflow adsorption and collection of dust.

[0047] Figure 14 yes Figure 11 The enlarged view of view C in the middle is a schematic structural diagram of one of the bag-type dust collection and drainage ditch of the present invention.

[0048] Figure 15 yes Figure 14View of the middle-bag dust drainage ditch in direction A.

[0049] Figure 16 This is one of the top view schematic diagrams of the B-type road of the present invention.

[0050] Figure 17 yes Figure 16 GG cross-sectional view.

[0051] Specific implementation cases

[0052] Embodiment 1 of the present invention:

[0053] The present invention self-cleans the road, Figure 11 The road surface 2 is generally asphalt concrete or cement concrete for motor vehicles to travel on, 3 is a concrete cushion layer, and compacted soil is underneath the cushion layer. Since curbstones and drainage facilities are generally required at the edge of the road surface 2, this embodiment uses a bag-type dust collection drainage ditch 8 as a drainage facility, and the portion of the bag-type dust collection drainage ditch 8 protruding from the road surface, namely the shoulder 8f, is used as a curbstone, and the paving stone 5 at the transition of the road surface can be retained.

[0054] Figure 16 When car 1 passes through road surface 2, the front of the car first compresses the air, and the airflow carrying dust has an impact on the curbstones on the side of the road, generating positive pressure on the curbstones. After the car passes, the airflow moves forward, the pressure decreases, and negative pressure is generated on the curbstones. Figure 11 If a bag dust collection drain ditch 8 is set at the curb, the pulse airflow carrying dust is collected through the bag opening 8a, and the dust is deposited in the bag belly 8b of the bag dust collection drain ditch 8; and when the negative pressure on the bag opening 8a is generated after the car passes, the airflow design of the bag dust collection drain ditch 8 must be optimized to minimize the dust and PM10 particles in the bag dust collection drain ditch from being adsorbed and flowing back to the road surface 2.

[0055] Figure 12 , combined with Figure 13 Bag-type dust collection and drainage ditches 8 are installed on both sides of the road surface. Bag-type dust collection and drainage ditches 8 consist of a bag opening 8a, a bag throat 8j, a bag neck 8d, and a bag belly 8b. These four parts are interconnected in sequence, with their average horizontal height decreasing in sequence. Bag opening 8a faces the center of the road surface 2 and is flush with or slightly lower than the road surface. It is continuous along the road (i.e., the bag opening is not interrupted by any solid part). Of course, a design with a through-line of at least 50% is also acceptable. Between bag opening 8a and bag neck 8d is a narrowest area, the bag throat 8j. Pulsed airflow carries dust entering from bag opening 8a. As it passes through bag throat 8j, it accelerates due to the narrowing, causing a decrease in pressure in the vicinity. This further absorbs dust from the air and road surface near bag opening 8a and accelerates it toward bag neck 8d. At bag neck 8d, it rapidly changes direction and is deposited on bag belly 8b.

[0056] Figure 12 , combined with Figure 13 Due to the sharp turn from the bag belly 8b to the bag mouth 8a and the narrowed bag throat 8j, only a part of the PM10 particles and PM2.5 particles lingering above the bag neck 8d will return to the road surface due to the negative pressure. Most of the dust that has been deposited in the sedimentation area inside the bag belly 8b and the PM10 particles suspended in the static zone will settle until they are carried away by rain.

[0057] Figure 12 As part of the optimized design, the pocket opening is defined as follows: The space enclosed by the horizontal line Y at the right edge of the lower portion of pocket opening 8a, the vertical line X at the rightmost end of the lower portion of pocket opening 8a, and the downward projection of the upper portion of pocket opening 8a along shoulder 8f is pocket opening 8a. Pocket opening 8a faces the center of the road surface and guides the pulsed airflow. A larger diameter h guides more pulsed airflow and dust.

[0058] The bag belly 8b is defined as follows: the lowest point of any beam projected from outside the bag opening 8a into the bagged dust drain 8 is the Z-dividing line. The space below this Z-dividing line and encompassing the drain groove 8c is the bag belly 8b. The bag belly 8b is minimally disturbed by the pulsed airflow and is a stable area, ideal for dust and PM10 particle deposition. Preferably, the area of the bag belly 8b should be greater than or equal to the combined area of the bag opening 8a, bag throat 8j, and bag neck 8d.

[0059] The bag neck 8d is defined as the space above the Z dividing line and below the Y dividing line. This space is the main turbulent area, and dust particles rely on inertial motion to impact downward.

[0060] The bag pharynx 8j is defined as the space above the Y dividing line and to the right of the X dividing line. The narrowest part of the bag pharynx 8j is the pharynx diameter a. This is where the pulsed airflow accelerates and begins its sharp turn, accelerating dust absorption at the bag opening. It also blocks rocks or other debris on the road surface that exceed the pharynx diameter a, preventing them from sliding down into the bag belly 8b.

[0061] Above the bag opening, the dimension A of the solid part to the left of the X dividing line extending along the shoulder toward the center of the road is greater than or equal to 0, which means that the bag throat 8j, bag neck 8d and bag belly 8b are completely covered, ensuring the safety of motorcycles, electric vehicles, bicycles and pedestrians.

[0062] The height H between the upper entity of the bag opening 8a, i.e., the shoulder 8f and the road surface or the Y dividing line, is the shoulder and also constitutes the road curb, which plays the role of isolating motor vehicles and effectively protecting the safety of pedestrians on the right side of the curb.

[0063] In the preferred design, the bag opening diameter h decreases along the bag pharynx direction to the bag pharynx diameter a, and then increases along the bag neck direction to the widest bag belly size.

[0064] The preferred design is to set a certain water level in the bag belly 8b. Figure 17 The bag dust collection drainage ditch 8 is equipped with a water retaining dam 8k near the outlet edge of the sedimentation well 20. The height of the water retaining dam 8k is flush with the water level. After rain, the accumulated water can maintain the water level for a period of time, which is conducive to absorbing PM10 and even PM2.5 particles in the air. It also prevents and reduces the sediment in the bag dust collection drainage ditch 8 from returning to the road and air due to the pulsating airflow.

[0065] Maintenance: Rainwater flowing from the bag-type dust collection drain 8 enters the sedimentation well 20, and a small amount of road water is directly discharged into the sedimentation well 20 through the rainwater outlet 20b. It is then discharged into the municipal pipeline through the drain pipe 21. Road dust, rocks with a diameter a or smaller, and other debris fall into and are deposited in the bag 8b. A certain amount of rainfall can flush road dust and other debris into the sedimentation well 20. If a large number of rocks have accumulated, the well cover 20c can be opened to enter the sedimentation well 20a, and the rocks in the bag 8b can be removed using tools.

[0066] The present embodiment road leveling stone can be included or can be omitted.

[0067] Example 2:

[0068] The present invention provides a bag-type dust collection drainage ditch. Figure 14 、 Figure 15 The invention comprises a drainage ditch 8c and a ditch cover 8p, disposed along the edge of a road. The two walls of the drainage ditch 8c, one long and one short, form an asymmetrical U-shaped bottom. The upper end of the long wall is flush with the road surface 2 or paving stones 5, while the upper end of the short wall is inclined with the ditch cover 8p. At least one positioning post 8pe is provided on the lower surface of the ditch cover 8p. Thus, the ditch cover 8p and the drainage ditch 8c form a pocket, a throttle, a neck, and a belly. The definitions of the pocket, throttle, neck, and belly are the same as those in Example 1 and will not be further elaborated. This embodiment is used to absorb and collect accumulated road dust and for road drainage. The portion of the ditch cover 8p that is above the road surface acts as a curbstone.

[0069] The marking method of the X, Y, and Z dividing lines in this example is the same as that in Example 1. The marking and function of the diameter h, throat diameter a, shoulder height H, and distance A extending from the X dividing line to the center of the road along the shoulder are the same as those in Example 1 and will not be repeated.

[0070] After the groove cover 8p is installed by the positioning column 8pe, the gap between it and the upper end of the short end groove wall is fixed with concrete mortar 8g. Then backfill the soil and cover the groove cover 8p.

[0071] Drainage ditch 8c is cast in situ with concrete, or built with brick and concrete, or built with stone concrete, or prefabricated concrete is formed and then fixed.

[0072] The trench cover 8p is made of prefabricated concrete panels, about 1 meter long. After the drainage trench 8c is built, they are installed one by one and fixed with concrete mortar. There are generally two positioning columns 8pe set under the trench cover 8p, which are set at both ends. Figure 15 The positioning post 8pe occupies a very small portion of the entire bag opening 8a and is positioned as close to the bag throat as possible, thus limiting its impact on airflow entering the drain ditch. The vulnerable component of this construction method is the groove cover 8p, which can be made of fiberglass reinforced steel wire or glass fiber reinforced prefabricated panels. This groove cover can be replaced while maintaining the integrity of the drain ditch 8c, reducing costs and facilitating maintenance.

Claims

1. Self-cleaning road, which is characterized by: road A bag-type dust collection drainage ditch is set on the edge. The bag-type dust collection drainage ditch includes a bag opening, a bag throat, a bag neck and a bag belly. The four are connected in sequence, and their horizontal horizontal line heights decrease in sequence; the bag opening faces the center of the road surface and is flush with or slightly lower than the road surface, and the bag opening is connected along the direction of the road; there is a narrowest part between the bag opening and the bag neck, which is the bag throat; the pulse airflow carries dust into the bag opening, and accelerates due to narrowing when passing through the bag throat, resulting in a decrease in nearby pressure, further absorbing the air near the bag opening and the dust on the road surface to accelerate toward the bag neck, rapidly change direction at the bag neck, and deposit in the bag belly.

2. The self-cleaning road according to claim 1, characterized in that: The upper solid part of the bag opening is a shoulder, and the dimension A of the shoulder extending toward the center of the road is greater than or equal to 0.

3. The self-cleaning road according to claim 2, characterized in that: The height between the shoulder and the road surface is H, forming a road curb.

4. The self-cleaning road according to claim 1, characterized in that: The diameter h of the bag opening is greater than the diameter a of the bag pharynx, and the area of the bag belly is greater than or equal to the sum of the areas of the bag opening, bag pharynx and bag neck.

5. The self-cleaning road according to claim 1, 2, 3 or 4, characterized in that: The bag belly maintains a certain water level, which is conducive to the adsorption of PM10 particles or PM2.5 particles in the air.

6. A bag-type dust collection drain, characterized by: The invention comprises a drainage ditch (8c) and a ditch cover (8p) arranged at the edge of a road. The two ditch walls and the ditch bottom of the drainage ditch (8c) are in an asymmetrical U-shape. The top of the long end ditch wall is flush with the road surface or paving stones. The ditch cover (8p) is arranged at an angle on the top of the short end ditch wall. At least one positioning column (8pe) is arranged on the lower bottom surface of the ditch cover (8p). In this way, the ditch cover (8p) and the drainage ditch (8c) form a bag mouth, a bag throat, a bag neck and a bag belly for absorbing and collecting deposited road dust and road drainage. The portion of the ditch cover (8p) above the road surface acts as a curbstone.

7. The bag-type dust collection drain according to claim 6, characterized in that: After the groove cover plate (8p) is positioned and installed by the positioning column (8pe), it is fixed to the top of the short end groove wall with cast-in-place concrete mortar (8g).

8. The bag-type dust collection drain according to claim 6 or 7, characterized in that: The trench cover (8p) is a prefabricated plate, a concrete prefabricated plate containing fiber steel wire or glass fiber.

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