Road drainage system after municipal transformation of road

Abstract

The invention relates to the technical field of road drainage engineering, in particular to a road drainage system after municipal transformation of a road. The rainwater distribution condition after municipal transformation of the expressway is considered as a whole, the drainage structure is reasonably arranged to be effectively connected with a municipal drainage system, graded drainage is achieved, drainage pressure is reduced, and the rapid drainage requirement of municipal transformation of the expressway is met; the road drainage system is beneficial to reducing the pressure of a downstream drainage pipeline, reducing the specification of the drainage pipeline and reducing the engineering investment.

Description

Technical Field

[0001] The invention relates to the technical field of road drainage engineering, in particular to a road drainage system after municipalization transformation of a highway. Background Art

[0002] For highways passing through the urban area, when the land on both sides is not developed, the road rainwater is usually discharged to the land on both sides of the highway in a scattered manner. The scattered drainage method means that the rainwater is discharged unorganized along the inclined surface of the road cross slope into the surrounding land, nearby water bodies or drainage facilities such as side ditches, drainage ditches, and rapids troughs. Figure 1 As shown. With the acceleration of urban development, urban development has spread from the center to the surrounding suburbs, which has prompted the municipalization of highways. The urban pipeline layout, green belts and sidewalks and other facilities are comprehensively considered on both sides of the original highways, and the traffic structure is complex. After the municipalization of highways, parameters such as road catchment area, comprehensive runoff coefficient, and rainfall duration will change significantly. If the rainwater dispersion method is still used, it is easy to wash the slopes or green belts to form gullies, and the shoulders are prone to water accumulation, affecting the safety of urban pedestrians and vehicles. In addition, if the rainwater is dispersed and infiltrated for a long time and is not discharged into the river in time, it will affect the sinking of the road and the foundation of the land. Therefore, the rainwater dispersion method of the original highway can no longer meet the new drainage needs. While the highway is municipalized, the road drainage project design should be improved and optimized simultaneously to effectively connect the rainwater dispersed by the road with the municipal drainage system. Summary of the invention

[0003] The purpose of the present invention is to provide a road drainage system after the municipalization transformation of the highway, in view of the problem in the prior art that after the original highway is transformed into a municipal highway, it is necessary to effectively connect the rainwater discharged from the original highway with the municipal drainage system to meet the drainage needs of the new municipalized road after the transformation.

[0004] In order to achieve the above object, the technical solution adopted by the present invention is:

[0005] A road drainage system after municipalization transformation of a highway, comprising a main road, an auxiliary road and a slope green belt between the main and auxiliary roads, wherein the main road is arranged to be inclined transversely and longitudinally, the auxiliary road and the slope green belt between the main and auxiliary roads are both located at the lateral lower side of the main road, the slope green belt between the main and auxiliary roads is located between the main road and the auxiliary road, a first curbstone and a plurality of first rainwater inlets are arranged at the lateral lower side of the main road, the first curbstones are arranged continuously along the longitudinal direction of the road, the first rainwater inlets are arranged at intervals along the longitudinal direction of the road and the first rainwater inlets are located at the back side of the first curbstone, a first water inlet is arranged at the front side of the first curbstone corresponding to the position of each of the first rainwater inlets, and the first water inlet is connected to the first rainwater inlet;

[0006] The side slope green belt between the main and auxiliary roads is arranged in a transversely inclined manner, and the auxiliary road is located at the transversely lower side of the side slope green belt between the main and auxiliary roads;

[0007] A second curbstone and a grass-planting ditch are provided on the lower side of the green belt on the slope between the main and auxiliary roads along the longitudinal direction of the road, and a plurality of second rainwater inlets are provided at intervals in the grass-planting ditch;

[0008] The second rainwater outlet is transversely connected to the first rainwater outlet through a first connecting pipe, and a plurality of the second rainwater outlets are all connected to the municipal drainage system.

[0009] The present invention widens the road width by adding slope green belts and auxiliary roads between the main and auxiliary roads on the lower side of the original main road (i.e., the original highway) where the slope is horizontally sloped, and retains the original method of dispersing rainwater along the road surface of the main road, which is conducive to reducing the amount of reconstruction work. On this basis, in order to adapt to municipal drainage, the present invention continuously arranges first curbstones on the lower side of the main road in the horizontal direction, arranges first rainwater outlets at intervals along the longitudinal direction of the line on the back side of the first curbstone, and arranges a plurality of first water inlets connected to each first rainwater outlet on the front side of the first curbstone, so that the rainwater dispersed laterally along the road surface of the main road can be gathered toward the first curbstone, and the rainwater gathered at the first curbstone can be simultaneously gathered into each first rainwater outlet along the longitudinal slope of the main road under the blocking effect of the first curbstone, and then discharged to a plurality of first connecting pipes through the corresponding first connecting pipes. At the second rainwater outlet, the water is discharged to the municipal drainage system from the second rainwater outlet, which is beneficial to the rapid drainage of the main road, can avoid the long-term accumulation of rainwater on the shoulder of the main road, and avoid the rainwater on the main road from eroding the side slope green belt between the main and auxiliary roads on the side, while reducing the water storage pressure at the first rainwater outlet; at the same time, the first rainwater outlet is set on the back of the first curb, which is beneficial to maintaining the continuity of the first curb and the overall appearance is beautiful. During construction, there is no need to destroy the original road surface of the main road, so the construction is convenient, and the situation of vehicle pressure covering is avoided, which is beneficial to driving safety.

[0010] Furthermore, the present invention sets the side slope green belt between the main and auxiliary roads in a horizontal tilt from high to low on one side of the main road, so that rainwater falling on the surface of the side slope green belt between the main and auxiliary roads can be drained along the side away from the main road, which is conducive to maintaining the cleanliness of the main road; rainwater discharged along the surface of the side slope green belt between the main and auxiliary roads can be collected along the inclined surface to the grass-planted ditch on the lower side of the side slope green belt between the main and auxiliary roads. The grass-planted ditch can be used to accumulate rainwater, and part of the rainwater can be filtered and infiltrated through the grass-planted ditch, reducing the drainage pressure of the second rainwater outlet and subsequent drainage pipes. After the grass-planted ditch is saturated, the remaining rainwater can overflow into the second rainwater outlet along the grass-planted ditch, be collected at the second rainwater outlet and discharged to the municipal drainage system. The setting of the grass-planted ditch and the second curb can prevent the surface rainwater at the side slope green belt between the main and auxiliary roads from scouring into the auxiliary road, which is conducive to reducing the surface water on the auxiliary road.

[0011] The above-mentioned drainage system can meet the rapid drainage needs of the municipalization transformation of expressways. The present invention realizes graded drainage and diversion by reasonably arranging the drainage structures of the main roads, auxiliary roads and the slope green belts between the main and auxiliary roads, thereby reducing the water accumulation pressure at the first rainwater outlet and the second rainwater outlet, thereby facilitating the reduction of the downstream pipeline diameter and reducing the pipeline layout cost.

[0012] As a preferred embodiment of the present invention, a plurality of inspection wells are provided at intervals along the longitudinal direction of the line at the auxiliary road, and the plurality of inspection wells are connected by a rainwater main pipe, the rainwater main pipe is connected to the municipal drainage system, and the second rainwater outlet is connected to the inspection wells via a second connecting pipe.

[0013] As a preferred embodiment of the present invention, the auxiliary road is arranged to be laterally inclined, and the second curbstone is located on the laterally higher side of the auxiliary road, that is, the auxiliary road is arranged to be inclined from high to low from the side where the second curbstone is located, so that rainwater on the auxiliary road surface can flow along the transverse slope to the lower side and be discharged outward. Compared with draining the accumulated water on the slope green belt between the main and auxiliary roads and the auxiliary road through the second rainwater outlet, the drainage pressure of the second rainwater outlet on the higher side can be reduced.

[0014] As a further preferred embodiment of the present invention, the auxiliary road includes a first auxiliary road arranged in a transverse inclination, the first auxiliary road is adjacent to the second curbstone, the first auxiliary road is arranged in a longitudinal inclination, a third gully and a third curbstone are arranged on the transverse lower side of the first auxiliary road, the third gully is used to collect rainwater on the road surface of the first auxiliary road, and the third gully is connected to the inspection well through a third connecting pipe. The transverse lower side of the auxiliary road away from the second curbstone can collect slope rainwater through the third gully, reducing the drainage pressure of the second gully on the higher side.

[0015] This plan temporarily stores rainwater from the main road, the green belt on the slope between the main and auxiliary roads, and the first auxiliary road in the first rainwater outlet, the second rainwater outlet, and the third rainwater outlet along the road slope, and discharges rainwater from the first rainwater outlet in stages from the first connecting pipe to the second rainwater outlet, and then from the second rainwater outlet to the inspection well through the second connecting pipe, and discharges rainwater from the third rainwater outlet directly into the inspection well through the third connecting pipe, and then uniformly discharges rainwater from the rainwater main pipe in the inspection well to the municipal drainage system; since the rainwater that flows into the inspection well from each connecting pipe is limited by the diameter of the connecting pipe, and the rainwater outlet and the inspection well both have a temporary storage function, the prevalence time of rainwater in the pipe is extended, and the flow rate discharged from the inspection well through the rainwater main pipe into the municipal drainage system can be effectively controlled, which is conducive to reducing the pressure of the rainwater main pipe and the downstream drainage pipe, and reducing the pipe specifications.

[0016] As a preferred embodiment of the present invention, the auxiliary road also includes a second auxiliary road and a green belt on the side of the auxiliary road, the green belt on the side of the auxiliary road is located between the first auxiliary road and the second auxiliary road, the second auxiliary road is inclined toward the side away from the green belt on the side of the auxiliary road, the second auxiliary road is inclined along the longitudinal direction, and a fourth curb and a fourth rainwater outlet for collecting rainwater on the surface of the second auxiliary road are provided on the lower lateral side of the second auxiliary road, and the fourth rainwater outlet is connected to the third rainwater outlet through a fourth connecting pipe. This plan also adds a second auxiliary road and a green belt on the side of the auxiliary road on the outside of the first auxiliary road, widens the width of the municipal road and facilitates traffic; on this basis, by setting a fourth curb and a fourth stormwater outlet on the lower side of the second auxiliary road, the rainwater laterally dispersed along the second auxiliary road surface can be gathered toward the fourth curb, and the rainwater gathered at the fourth curb can be blocked by the fourth curb and gathered into the fourth stormwater outlet along the longitudinal slope of the second auxiliary road, and then discharged from the fourth connecting pipe to the corresponding third stormwater outlet, and then discharged from the third stormwater outlet to the inspection well through the third connecting pipe, so as to realize the drainage of the second auxiliary road surface.

[0017] As a preferred embodiment of the present invention, the auxiliary road also includes a third auxiliary road, which is higher than the second auxiliary road and is inclined toward the side close to the second auxiliary road, so that rainwater on the road surface of the third auxiliary road can flow to the fourth rainwater outlet, thereby realizing drainage of the third auxiliary road.

[0018] As a further preferred embodiment of the present invention, the inspection well is located at the first auxiliary road, and the length of the third connecting pipe is shorter than that of the second connecting pipe. The third connecting pipe on the lower side of the road is set shorter than the second connecting pipe, which shortens the rainwater flow distance and helps to balance drainage efficiency and driving stability.

[0019] As a preferred embodiment of the present invention, an overflow port for filtering rainwater is provided at the top of the second rainwater outlet, and the top of the second rainwater outlet is arranged higher than the bottom of the grass-planted ditch, so that the grass-planted ditch can have a certain water storage function. After the rainwater in the grass-planted ditch accumulates to a certain capacity, it overflows into the second rainwater outlet, which is beneficial to reducing the water storage pressure of the second rainwater outlet and the downstream drainage pipe, and at the same time, filtering through the overflow port can prevent debris from clogging the overflow port.

[0020] As a preferred solution of the present invention, a filter is provided at the first water inlet, and the filter is located on the back of the first curbstone. The filter is used to filter road debris, and the filter is arranged on the back of the first curbstone to make the road look neat and beautiful.

[0021] As a preferred solution of the present invention, a detachable cover plate is provided on the top of the first rainwater outlet, and a plurality of water leakage holes are provided on the cover plate.

[0022] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0023] The road drainage system after the municipalization transformation of the highway provided by the present invention comprehensively considers the distribution of rainwater after the municipalization transformation of the highway, and reasonably designs the drainage structure at the corresponding position according to the distribution of rainwater at different positions, so as to effectively connect the newly transformed road drainage system with the municipal drainage system. The road drainage system can realize hierarchical drainage, reduce drainage pressure, and meet the rapid drainage needs of the municipalization transformation of the highway; the use of the road drainage system is conducive to reducing the pressure of the downstream drainage pipe, reducing the specifications of the drainage pipe, and reducing the project investment. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the structural layout of the Zhongyuan Expressway in the prior art;

[0025] Figure 2 It is a schematic diagram of the structural arrangement of the road drainage system adopted after the expressway is municipalized in the embodiment;

[0026] Figure 3 yes Figure 2 Floor plan of

[0027] Figure 4 It is a schematic diagram of the drainage structure between the main road and the auxiliary road;

[0028] Figure 5 yes Figure 4 A partial enlarged view of the main road side;

[0029] Figure 6 yes Figure 4 A partial enlarged view of the side of the central auxiliary road;

[0030] Figure 7 It is a cross-sectional schematic diagram of the arrangement of the grass-planting ditch;

[0031] Figure 8 It is the plan layout of the first curb and the first stormwater inlet;

[0032] Fig. 9 yes Figure 8 Elevation drawing of

[0033] Fig.10 yes Fig. 9 AA section view in;

[0034] Fig.11 This is a schematic diagram of the plan structure at the second rainwater outlet;

[0035] Fig.12 yes Fig.11 BB section diagram in;

[0036] Fig.13 yes Fig.11 CC section view in .

[0037] Icons: 1-main road; 2-first auxiliary road; 3-green belt on the side of the auxiliary road; 4-second auxiliary road; 5-third auxiliary road; 6-slope green belt between the main and auxiliary roads; 7-first curbstone; 71-first water inlet; 8-first rainwater outlet; 81-filter element; 82-cover plate; 83-leakage hole; 9-first connecting pipe; 10-second curbstone; 11-grass ditch; 12-second rainwater outlet; 13-overflow outlet; 14-second connecting pipe; 15-inspection well; 16-rainwater main pipe; 17-third curbstone; 18-third rainwater outlet; 19-third connecting pipe; 20-fourth curbstone; 21-fourth rainwater outlet; 22-fourth connecting pipe. DETAILED DESCRIPTION

[0038] The present invention is further described in detail below in conjunction with specific embodiments. However, this should not be understood as the scope of the above subject matter of the present invention being limited to the following embodiments, and all technologies realized based on the content of the present invention belong to the scope of the present invention.

[0039] Unless otherwise specified, in the description of the specific embodiments of the present invention, the terms indicating the orientation or position relationship such as "up", "down", "left", "right", "center", "inside", "outside", etc. are all expressions based on the orientation or position relationship shown in the drawings, or are the orientation or position relationship when the invented product / equipment / device is usually used. These terms of orientation or position relationship are only for the convenience of describing the scheme of the present invention or simplifying the description in the specific embodiments, so as to facilitate the technicians to quickly understand the scheme, and do not indicate or imply that a specific device / component / element must have a specific orientation, or be constructed and operated in a specific position relationship, and therefore cannot be understood as a limitation on the present invention.

[0040] In addition, if the terms "horizontal", "vertical", "overhanging", "parallel" and the like appear, it does not mean that the corresponding devices / components / elements are required to be absolutely horizontal or vertical or overhanging or parallel, but may be slightly tilted or have deviations. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but may be slightly tilted. Alternatively, it can be simplified to mean that the corresponding devices / components / elements are set in directions such as "horizontal", "vertical", "overhanging", "parallel", etc., and can have an error / deviation of ±10% relative to the corresponding direction setting, more preferably an error / deviation within ±8%, more preferably an error / deviation within ±6%, more preferably an error / deviation within ±5%, and more preferably an error / deviation within ±4%. As long as the corresponding device / component / element is within the error / deviation range, it can still achieve its role in the scheme of the present invention.

[0041] In addition, the expressions “first”, “second”, “third”, etc., which appear in the terms, are merely used to distinguish the description of the same or similar components and should not be understood as emphasizing or implying the relative importance of specific components.

[0042] In addition, in the description of the embodiments of the present invention, "several", "plurality" and "a number" represent at least 2. It can be any number such as 2, 3, 4, 5, 6, 7, 8, 9, and even more than 9.

[0043] In addition, in the description of the technical solution of the present invention, unless otherwise clearly specified / defined / restricted, the terms "set", "install", "connect", "connected", "provided with", "laid", and "arranged" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection, and can be welding, riveting, bolting, threading, and other commonly used connection means in the field. This connection can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection, or an indirect connection through an intermediate medium, and it can be the internal connection of two elements.

[0044] Example

[0045] A road drainage system after the municipalization transformation of a highway, such as Figure 2-Figure 13 As shown, it includes a main road 1, an auxiliary road and a slope green belt 6 between the main and auxiliary roads. The original expressway is used as the main road 1, and the main road 1 is inclined in the horizontal direction and in the longitudinal direction; the auxiliary road and the slope green belt 6 between the main and auxiliary roads are arranged on the lower horizontal side of the main road 1, and the slope green belt 6 between the main and auxiliary roads is located between the main road 1 and the auxiliary road, and the municipal reconstruction and expansion is carried out based on the original expressway; in order to adapt to the rainwater dispersion mode of the main road 1 so that it can be effectively connected with the municipal drainage system, the first curb 7 and a plurality of first rainwater outlets 8 are arranged on the lower horizontal side of the main road 1 in this embodiment, and the first curb 7 is used to block the rainwater from being discharged into the slope to form water accumulation and erosion, which is beneficial to reduce soil loss, and the first curb 7 is continuously arranged along the longitudinal direction of the road, and the first rainwater outlets 8 are arranged at intervals along the longitudinal direction of the road. 8 is located on the back side of the first curb 7, and a first water inlet 71 is provided on the front side of the first curb 7 corresponding to the position of each first rainwater outlet 8. The first water inlet 71 is connected with the first rainwater outlet 8, so that rainwater laterally scattered on the pavement of the main road 1 can be drained along the first curb 7 and flow into the first rainwater outlet 8 through the first water inlet 71 on the side. The first rainwater outlet 8 is used to collect rainwater and discharge it from a specific path on the side, thereby reducing the accumulation or infiltration of rainwater on the main road 1. In addition, arranging the first rainwater outlet 8 on the back side of the first curb 7 is conducive to maintaining the continuity of the first curb 7, and the overall appearance is beautiful. During construction, there is no need to destroy the original pavement of the main road 1, so the construction is convenient, and the situation of vehicle pressure covering is avoided, which is conducive to driving safety.

[0046] Furthermore, if Figure 3 , Figure 4 As shown, in this embodiment, the slope green belt 6 between the main and auxiliary roads is arranged to be inclined in the transverse direction, and the auxiliary road is located at the transverse lower side of the slope green belt 6 between the main and auxiliary roads, that is, the main road 1 is located at the higher side of the slope green belt 6 between the main and auxiliary roads, which is conducive to timely discharge of excess rainwater on the slope green belt 6 between the main and auxiliary roads, so that the rainwater on the surface of the slope green belt 6 between the main and auxiliary roads can be discharged along the transverse slope surface toward the side away from the main road 1, reducing the accumulation and infiltration of rainwater at the slope green belt 6 between the main and auxiliary roads, reducing the risk of sinking of the main road 1 and the foundation of the plot, and also helping to reduce the water storage pressure of the first rainwater outlet 8; further, in order to collect the main and auxiliary roads, In order to prevent the surface rainwater of the green belt 6 on the slope between the main and auxiliary roads from flowing into the auxiliary road, the present embodiment considers setting the second curb 10 and the grass-planting ditch 11 continuously along the longitudinal direction of the road on the lower side of the green belt 6 on the slope between the main and auxiliary roads. The grass-planting ditch 11 and the second curb 10 can be used to intercept rainwater and soil. The grass-planting ditch 11 is located on the inner side of the second curb 10, and the two are adjacent. The grass-planting ditch 11 can be set obliquely along the longitudinal direction of the road, and a plurality of second rainwater outlets 12 are arranged at intervals in the grass-planting ditch 11. The rainwater accumulated in the grass-planting ditch 11 can flow to the second rainwater outlet 12 along the inclined slope. When the rainfall is small, the rainwater received in the green belt 6 on the slope between the main and auxiliary roads can all be collected through the infiltration of the green belt 6 on the slope between the main and auxiliary roads; when the rainfall is large, it can be collected through the grass-planting ditch 11 and the second rainwater outlet 12 set at the bottom of the green belt 6 on the slope between the main and auxiliary roads. In this embodiment, the positions and numbers of the second rainwater inlets 12 and the first rainwater inlets 8 are preferably set corresponding to each other, and each second rainwater inlet 12 is horizontally connected to the corresponding first rainwater inlet 8 through a first connecting pipe 9, and the first connecting pipe 9 is tilted from the first rainwater inlet 8 from high to low, and a plurality of second rainwater inlets 12 are connected to the municipal drainage system. The rainwater in the first rainwater inlet 8 is horizontally discharged to the second rainwater inlet 12 at a distance through the first connecting pipe 9, and then discharged to the municipal drainage system from the second rainwater inlet 12, reducing the water storage pressure at the first rainwater inlet 8 and the second rainwater inlet 12, thereby realizing the collection and rapid drainage of rainwater on the main road 1, avoiding the long-term accumulation of rainwater on the shoulder of the main road 1, and realizing the connection between the original highway scattered rainwater discharge method and the municipal drainage system.

[0047] Preferably, if Fig. 9 , Fig.10 As shown, in this embodiment, a filter 81 is provided at the first water inlet 71 to block road debris, and the filter 81 is located on the back of the first curb 7, corresponding to the inlet position of the first rainwater inlet 8. The filter 81 is arranged on the back of the first curb 7, so that the road looks neat and beautiful without being obtrusive.

[0048] In this embodiment, the first rainwater inlet 8 is made of reinforced concrete. Figure 8 , Fig.10 As shown, the first curb 7 and the first rainwater outlet 8 are matched in a concave-convex manner. The top of the first rainwater outlet 8 is an open structure, and a detachable cover plate 82 is provided. The cover plate 82 is flush with the top surface of the first curb 7, and a plurality of leakage holes 83 are provided on the cover plate 82.

[0049] In this embodiment, if Figure 6-Figure 7 , Figure 11-13 As shown, the second rainwater inlet 12 adopts a single-grate flat-grate rainwater inlet, which is open at the top. The top of the second rainwater inlet 12 is 100 mm higher than the bottom of the grass-planting ditch 11. An overflow port 13 is provided on the top to cover the opening. The overflow port 13 adopts a square cast iron overflow port 13 structure. By setting the top of the second rainwater inlet 12 higher than the bottom of the grass-planting ditch 11, the grass-planting ditch 11 can have a certain water storage function, reducing the water storage pressure of the second rainwater inlet 12. After the water volume in the grass-planting ditch 11 is higher than the top position of the second rainwater inlet 12, it enters the second rainwater inlet 12 through the overflow port 13. At the same time, the rainwater is filtered through the overflow port 13 to prevent debris from clogging the overflow port 13. The second rainwater inlet 12 can be adjusted in elevation according to the actual situation on site, but the top elevation of the overflow port 13 set on the auxiliary road side shall not be higher than the top elevation of the second curb 10 of the road.

[0050] Furthermore, in this embodiment, the auxiliary road is arranged to be inclined transversely, and the second curbstone 10 is located on the side of the auxiliary road that is higher transversely, so that rainwater on the auxiliary road surface can flow to the lower side along the transverse slope and be discharged, thereby reducing the drainage pressure of the second rainwater outlet 12 on the higher side. Figure 2 , Figure 3 As shown, the auxiliary roads in this embodiment include a first auxiliary road 2, a second auxiliary road 4 and a third auxiliary road 5. An auxiliary road side green belt 3 is arranged between the first auxiliary road 2 and the second auxiliary road 4. Rainwater is received in the auxiliary road side green belt 3, and is collected and discharged through the auxiliary road side green belt 3. The main road 1 and the first auxiliary road 2 are used as motor vehicle lanes, the second auxiliary road 4 is used as a non-motor vehicle lane, and the third auxiliary road 5 is used as a sidewalk. At the first auxiliary road 2, a number of inspection wells 15 are arranged at intervals along the longitudinal direction of the line. The inspection wells 15 should be avoided as far as possible from the position where the tires of motor vehicles travel. Adjacent inspection wells 15 are connected by a rainwater main pipe 16, and the rainwater main pipe 16 is connected to the downstream municipal drainage system. The second rainwater outlet 12 is connected to the inspection well 15 through a second connecting pipe 14. The inspection well 15 is further graded for drainage and drainage to reduce the water storage pressure of the first rainwater outlet 8 and the second rainwater outlet 12.

[0051] The first auxiliary road 2 is provided with a transverse slope and a longitudinal slope. The higher side of the first auxiliary road 2 is adjacent to the second curb 10. The transverse lower side of the first auxiliary road 2 is provided with a third curb 17 and a plurality of third gullies 18 to avoid conflicts between the third gully 18 and the second gully. The third gully 18 is arranged close to the third curb 17. The scattered rainwater on the first auxiliary road 2 can be stored in the third gully 18. The third gully 18 is connected to the inspection well 15 through the third connecting pipe 19 to realize the drainage of the road surface of the first auxiliary road 2. Among them, the length of the third connecting pipe 19 is shorter than the length of the second connecting pipe 14, which shortens the rainwater flow distance and is conducive to rapid drainage.

[0052] The second auxiliary road 4 is inclined toward the side away from the auxiliary road side green belt 3, and the second auxiliary road 4 is inclined along the longitudinal direction. A fourth curbstone 20 and a fourth rainwater outlet 21 for collecting rainwater on the surface of the second auxiliary road 4 are provided on the lower lateral side of the second auxiliary road 4. The fourth rainwater outlet 21 is connected to the third rainwater outlet 18 through a fourth connecting pipe 22 to achieve road surface drainage of the second auxiliary road 4.

[0053] The third auxiliary road 5 is arranged higher than the second auxiliary road 4 and is inclined toward the side close to the second auxiliary road 4 , so that rainwater on the road surface of the third auxiliary road 5 flows to the fourth rainwater outlet 21 , thereby draining the third auxiliary road 5 .

[0054] In this embodiment, the third gully 18 and the fourth gully 21 both adopt a double-grate vertical grate gully structure, and the first connecting pipe 9, the second connecting pipe 14, the third connecting pipe 19 and the fourth connecting pipe 22 are all inclined to facilitate rapid discharge.

[0055] By arranging a third curbstone 17 and a third stormwater inlet 18 on the lower lateral side of the first auxiliary road 2, and arranging a fourth curbstone 20 and a fourth stormwater inlet 21 on the lower lateral side of the second auxiliary road 4, rainwater on the road surface of the first auxiliary road 2 can flow to the third stormwater inlet 18 by itself under the blocking effect of the third curbstone 17, and rainwater on the road surface of the second auxiliary road 4 can flow to the fourth stormwater inlet 21 by itself under the blocking effect of the fourth curbstone 20; rainwater on the road surface of the third auxiliary road 5 flows into the second auxiliary road 4 along the transverse slope, flows to the lowest point of the road together with the rainwater of the second auxiliary road 4, and flows to the fourth stormwater inlet 21 along the second auxiliary road 4; rainwater from the fourth stormwater inlet 21 can be discharged into the third stormwater inlet 18 through the fourth connecting pipe 22 and merged into the inspection well 15 through the third connecting pipe 19, and then discharged downstream through the rainwater main pipe 16 and discharged into the municipal drainage system, thereby realizing all-round rapid drainage of the auxiliary roads.

[0056] By adopting the above-mentioned drainage system, part of the rainwater can be infiltrated through the grass-planted ditch, and part of the rainwater can be accumulated in the grass-planted ditch. At the same time, drainage facilities with temporary storage functions such as rainwater connecting pipes, rainwater outlets, and inspection wells can be used to extend the discharge time of rainwater. The flow rate discharged into the municipal drainage system can be effectively controlled, and the pressure of the rainwater main pipe 16 and the downstream drainage pipe in the drainage system can be reduced, which is conducive to reducing the pipe specifications and reducing the pipe layout costs.

[0057] This embodiment is suitable for rapid drainage measures for rainwater in main and auxiliary roads and green belts after the municipalization transformation of expressways. This solution sets a first rainwater inlet 8 on the side of the main road 1, a second rainwater inlet 12 in the green belt 6 on the slope between the main and auxiliary roads, and a third rainwater inlet 18 and a fourth rainwater inlet 21 on the sides of the first auxiliary road 2 and the second auxiliary road 4, respectively, to collect rainwater on the road surface and overflow rainwater in the green belt, and further flow into the rainwater inspection well 15 quickly through the rainwater inlet connecting pipe, and finally discharged to the downstream by the rainwater main pipe 16, and at the same time, part of the rainwater is collected by infiltration through the grass-planted ditch 11. This plan comprehensively considers all rainwater after the municipalization of expressways, improves road drainage design standards and drainage safety, gives full play to the functions of urban drainage systems, and can effectively solve the risk of waterlogging on urban roads during rainfall; it also incorporates the concept of sponge cities, using sponge facilities to regulate, infiltrate, and retain rainwater, reduce peak flood flows, control annual runoff, and reduce pressure on downstream drainage pipes. It can reduce drainage pipe specifications and reduce project investment, with significant social, economic, and environmental benefits.

[0058] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A road drainage system after municipalization transformation of a highway, comprising a main road (1), an auxiliary road and a side slope green belt (6) between the main and auxiliary roads, wherein the main road (1) is arranged to be inclined in the transverse direction and in the longitudinal direction, the auxiliary road and the side slope green belt (6) between the main and auxiliary roads are both located on the lower side of the main road (1), and the side slope green belt (6) between the main and auxiliary roads is located between the main road (1) and the auxiliary road, characterized in that: A first curbstone (7) and a plurality of first rainwater inlets (8) are provided on the lower transverse side of the main road (1); the first curbstones (7) are arranged continuously along the longitudinal direction of the road; the first rainwater inlets (8) are arranged at intervals along the longitudinal direction of the road and the first rainwater inlets (8) are located on the back side of the first curbstone (7); a first water inlet (71) is provided on the front side of the first curbstone (7) corresponding to the position of each of the first rainwater inlets (8); and the first water inlet (71) is communicated with the first rainwater inlets (8); The side slope green belt (6) between the main and auxiliary roads is arranged in a transversely inclined manner, and the auxiliary road is located at the transversely lower side of the side slope green belt (6) between the main and auxiliary roads; A second curbstone (10) and a grass-planting ditch (11) are respectively arranged on the lower side of the side slope green belt (6) between the main and auxiliary roads along the longitudinal direction of the road, and a plurality of second rainwater inlets (12) are arranged at intervals in the grass-planting ditch (11); The second rainwater inlet (12) and the first rainwater inlet (8) are transversely connected via a first connecting pipe (9), and a plurality of the second rainwater inlets (12) are all connected to a municipal drainage system.

2. The road drainage system according to claim 1, characterized in that: A plurality of inspection wells (15) are arranged at intervals along the longitudinal direction of the line on the auxiliary road. The plurality of inspection wells (15) are connected to each other through a rainwater trunk pipe (16). The rainwater trunk pipe (16) is connected to the municipal drainage system. The second rainwater inlet (12) is connected to the inspection well (15) through a second connecting pipe (14).

3. The road drainage system according to claim 2, characterized in that: The auxiliary road is arranged to be inclined transversely, and the second curbstone (10) is located on a laterally higher side of the auxiliary road.

4. The road drainage system according to claim 3, characterized in that: The auxiliary road comprises a first auxiliary road (2) arranged in a transversely inclined manner, the first auxiliary road (2) being adjacent to the second curb (10), the first auxiliary road (2) being arranged in a longitudinally inclined manner, a third gully (18) and a third curb (17) being arranged on the lateral lower side of the first auxiliary road (2), the third gully (18) being used to collect rainwater on the road surface of the first auxiliary road (2), and the third gully (18) being connected to the inspection well (15) via a third connecting pipe (19).

5. The road drainage system according to claim 4, characterized in that: The auxiliary road further comprises a second auxiliary road (4) and a green belt (3) on the side of the auxiliary road. The green belt (3) on the side of the auxiliary road is located between the first auxiliary road (2) and the second auxiliary road (4). The second auxiliary road (4) is inclined toward a side away from the green belt (3) on the side of the auxiliary road. The second auxiliary road (4) is inclined in the longitudinal direction. A fourth curbstone (20) and a fourth rainwater outlet (21) for collecting rainwater on the surface of the second auxiliary road (4) are provided on the lower lateral side of the second auxiliary road (4). The fourth rainwater outlet (21) is connected to the third rainwater outlet (18) via a fourth connecting pipe (22).

6. The road drainage system according to claim 5, characterized in that: The auxiliary road further comprises a third auxiliary road (5), wherein the third auxiliary road (5) is arranged higher than the second auxiliary road (4), and the third auxiliary road (5) is arranged inclined toward the side close to the second auxiliary road (4).

7. The road drainage system according to claim 4, characterized in that: The inspection well (15) is located in the first auxiliary road (2), and the length of the third connecting pipe (19) is shorter than the length of the second connecting pipe (14).

8. The road drainage system according to any one of claims 1 to 7, characterized in that: An overflow port (13) for filtering rainwater is provided at the top of the second rainwater outlet (12), and the top of the second rainwater outlet (12) is arranged higher than the bottom of the grass-planting ditch (11).

9. The road drainage system according to any one of claims 1 to 7, characterized in that: A filter element (81) is provided at the first water inlet (71), and the filter element (81) is located on the back side of the first curbstone (7).

10. The road drainage system according to any one of claims 1 to 7, characterized in that: A cover plate (82) is detachably provided on the top of the first rainwater inlet (8), and a plurality of water leakage holes (83) are provided on the cover plate (82).

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