A median drainage system

Abstract

The utility model relates to a highway drainage technical field especially, more particularly to a kind of central reservation strip drainage system, it includes the multiple section drainage ditch being located between the region of two side curb strips and being set along the extension direction of road, and a water-collecting well is set in communication between two adjacent section drainage ditch;The drainage ditch upper cover is provided with cover plate, its upper side is provided with inverse filter layer, the upper side of inverse filter layer is provided with greening planting area;The upper side of inverse filter layer and the area of its cover plate upper side are laid first geotextile, two side curb strips vertical are respectively provided with curb stone, and curb stone and first geotextile form the greening planting area;The lower side of inverse filter layer is at least except the area of cover plate upper side and laid second geotextile.The utility model realizes the rainwater collection and discharge of middle strip, prevents rainwater from infiltrating to roadbed, protects car roadbed pavement stability and safety, guarantees the safety of driving.

Description

Technical Field

[0001] This utility model relates to the field of highway drainage technology, and in particular to a central median drainage system. Background Technology

[0002] Studies have shown that uneven settlement of the roadbed, heavy rainfall during the rainy season, and insufficient permeability of traditional blind drains can cause rainwater to infiltrate from the median strip, resulting in insufficient roadbed strength in the left lane. When the intensity of continuous rainfall exceeds the soil's infiltration capacity, surface runoff is likely to occur, which can also have a certain impact on green vegetation and driving safety.

[0003] Chinese patent CN222962202U discloses a roadbed and pavement drainage engineering structure, including a central median drainage unit and a roadbed drainage unit located in the middle of the road. The central median drainage unit includes longitudinal seepage ditches, collection wells, and transverse drainage pipes. Multiple collection wells are present, with the longitudinal seepage ditches connected to them, and transverse drainage pipes installed in the collection wells. The roadbed drainage unit includes side ditches, intercepting ditches, drop structures, rapid flow channels, and drainage ditches. The rapid flow channels are used to connect upstream and downstream water flows in areas with significant surface slopes. The intercepting ditches are located on the hillside of excavated road sections, and the drainage ditches are located in embankment sections. The side ditches on the side of the earthen shoulder are connected to the drainage ditches via the rapid flow channels, and the intercepting ditches are connected to the drainage ditches via drop structures. A diamond-shaped grid slope protection or an arched slope protection is provided on the other side of the earthen shoulder. Therefore, this application can integrate central median drainage and roadbed drainage into a unified system, thereby making the drainage of the roadbed and pavement smoother and improving the stability and safety of the mountain and roadbed.

[0004] However, the drainage unit in the central divider of this technical solution uses pipes and a filter layer as longitudinal seepage channels. The pipes are in direct contact with the filter layer, which can easily cause pipe blockage and affect the drainage capacity and service life of the pipes. Utility Model Content

[0005] The purpose of this invention is to address the aforementioned problems with highway drainage by providing a median strip drainage system to guide the collection and discharge of rainwater in the median strip, thereby improving the drainage of the median strip and enhancing the stability of the roadbed and the safety of driving.

[0006] To achieve the above objectives, this utility model provides the following technical solution: A central median drainage system includes multiple drainage ditches arranged in the area between the two side curbs and along the road extension direction, with a collection well connecting adjacent drainage ditches; each drainage ditch is covered with a cover plate, and a filter layer is provided above the cover plate, with a green planting area above the filter layer; a first geotextile is laid in the area above the filter layer and above the cover plate, and curb stones are vertically arranged on both side curbs, with the curb stones and the first geotextile forming the green planting area; a second geotextile is laid below the filter layer, at least in the area above the cover plate.

[0007] Furthermore, the lateral dimension of the green planting area is greater than the lateral dimension of the filter layer, which is greater than the lateral dimension of the drainage ditch.

[0008] Furthermore, the longitudinal section of the drainage ditch is U-shaped, with flanges protruding from both upper edges, and the cover plate is placed between the two flanges.

[0009] Furthermore, one edge of the second geotextile set on one side of the greening planting area is laid below the base of the curbstone, and the other edge is laid between the flange and the filter layer.

[0010] Furthermore, the lower base of the curbstone is cast with a cement mortar layer, and the outer edge of the second geotextile is located on the cement mortar layer.

[0011] Furthermore, the longitudinal cross-section of the upper surface of the cover plate is an arc shape with a concave center, and the first geotextile placed on top of it at least completely covers the upper surface of the cover plate.

[0012] Furthermore, the water collection well is a component made of C concrete cast in place, with a 10cm gravel layer underneath and a top cover on top. A horizontal drainage pipe is also provided on the water collection well.

[0013] Furthermore, an anti-settlement component is also installed inside the water collection well, which is used to stir the rainwater in the water collection well.

[0014] Furthermore, the anti-settlement component includes an impeller disposed above the transverse drainage pipe, a reduction gear assembly symmetrically disposed on both sides of the impeller, a transmission assembly connected to the reduction gear assembly, and a stirring assembly connected to the transmission assembly.

[0015] Furthermore, the stirring assembly includes a drive shaft and a stirring impeller mounted on the rotating shaft 1641; the stirring assembly is vertically and symmetrically arranged inside the water collection well, with its edge close to the side wall of the water collection well; the bottom of the stirring impeller is in contact with the bottom surface of the water collection well.

[0016] The beneficial effects of this utility model are as follows: (1) This utility model provides a central median drainage system, wherein the central median drainage system comprises multiple drainage ditches located between the two road curbs and extending along the road, with a collection well connected between adjacent drainage ditches; the drainage ditches are covered with a cover plate, and a filter layer is provided above the filter layer, with a green planting area above the filter layer; a first geotextile is laid above the filter layer and above the cover plate, and curb stones are vertically provided on both road curbs, with the curb stones and the first geotextile forming the green planting area; a second geotextile is laid below the filter layer, except for the area above the cover plate. Rainwater infiltrates through the green planting area, permeates the permeable geotextile, enters the filter layer, and then, after passing through the filter layer and the permeable geotextile on the top of the cover plate, flows into the drainage ditch. The collection well collects rainwater from the drainage ditch and, through the outlet of the transverse drainage pipe corresponding to the chute and side ditch, directs the water from the collection well into the chute, and then discharges the water into the side ditch on the outer side of the embankment. This utility model achieves rainwater collection and discharge in the median strip, prevents rainwater from seeping into the roadbed, protects the stability and safety of the roadbed and pavement, and ensures driving safety.

[0017] (2) By setting anti-settlement components in the water collection well, this utility model effectively solves the problem of unfiltered mud and sand in rainwater depositing at the bottom of the water collection well and affecting drainage, thereby improving the stability and long-term effectiveness of the drainage system. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the central median strip of this utility model. Figure 2 This is a schematic cross-sectional view of the drainage ditch of this utility model; Figure 3 This is an elevation view of the water collection well of this utility model; Figure 4 This is a horizontal drainage plan view of this utility model; Figure 5 This is a cross-sectional view of the horizontal drainage section of this utility model; Figure 6 This is a cross-sectional view of the water collection well of this utility model; Figure 7 This is a utility model Figure 6 Enlarged view of CIMC's well site.

[0019] Figure Labels 1-Drainage ditch, 2-Flange, 3-Cover plate, 4-Imperible geotextile, 5-Filter layer, 6-Permeable geotextile, 7-Green planting soil, 8-Curve stone, 9-Curve edge strip, 10-Cement mortar layer, 11-Water collection well, 12-Top cover, 13-Horizontal drainage pipe, 14-Rapid flow channel, 15-Side ditch, 16-Anti-settlement component, 161-Impeller, 162-Reduction component, 163-Transmission component, 164-Mixing component, 1641-Rotating shaft, 1642-Mixing impeller. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0022] Example 1 like Figures 1-5 As shown, this embodiment provides a central median drainage system, comprising multiple drainage ditches 1 located between the two side curb strips 9 and extending along the road direction, with a collection well 11 connecting adjacent drainage ditches 1; each drainage ditch 1 is covered with a cover plate 3, above which is a filter layer 5, and above the filter layer 5 is a green planting area 7; a first geotextile 6 is laid above the filter layer 5 and above the cover plate 3, and curb stones 8 are vertically arranged on both side curb strips 9, forming the green planting area 7 with the curb stones 8 and the first geotextile 6; a second geotextile 4 is laid below the filter layer 5, except for the area above the cover plate 3.

[0023] The lateral dimension of the green planting area 7 is greater than that of the filter layer 5, which is greater than that of the drainage ditch 1, and they are arranged in a stepped manner.

[0024] Preferably, a second geotextile 4 is provided below the filter layer 5 and on both sides of the cover plate 3, and is stretched taut during paving.

[0025] The longitudinal section of the drainage ditch 1 is U-shaped, with flanges 2 protruding from both upper edges, and the cover plate 3 covering the space between the two flanges 2; preferably, the drainage ditch 1 is cast in place with C25 concrete, with dimensions of 20cm×30cm and a wall thickness of 10cm; the cast in place with C25 concrete ensures smooth drainage while also being less prone to deformation.

[0026] One edge of the second geotextile 4, which is set on one side of the green planting area 7, is laid below the lower seat of the curb stone 8, and the other edge is laid between the flange 2 and the filter layer 5. This fixes the laying position of the second geotextile 4, preventing it from easily shifting and affecting rainwater drainage.

[0027] The curbstone 8 is supported by a cement mortar layer 10. The outer edge of the second geotextile 4 is located on the cement mortar layer 10. The cement mortar layer 10 not only fixes the second geotextile 4, but also stabilizes the placement of the curbstone 8, making the curb strip symmetrical and flat on both sides, and more aesthetically pleasing.

[0028] Preferably, the curbstone 8 is precast using C25 concrete and has dimensions of 100cm×15cm×16cm.

[0029] The longitudinal section of the upper surface of the cover plate 3 is an arc shape with a concave center, and the first geotextile 6 installed on top of it at least completely covers the upper surface of the cover plate 3; the arc-shaped cover plate design can smoothly guide rainwater to converge into the drainage ditch 1.

[0030] In this embodiment, the first geotextile 6 is a permeable geotextile, preferably a long-filament geotextile with a unit area mass of 300 g / m². 2 The permeability coefficient is ≥0.35cm / s, the tear strength is ≥0.5kN, the CBR puncture strength is ≥3.5kN, and the holding strength is ≥1.4kN. It is fixed with small iron nails. Rainwater passes through the permeable geotextile, enters the filter layer 5, and then collects in the drainage ditch 1 through the permeable geotextile.

[0031] In this embodiment, the second geotextile 4 is an impermeable geotextile. The impermeable geotextile is designed to prevent the filter layer 5 from mixing with the subgrade soil and affecting the function of the filter layer 5. Preferably, the impermeable geotextile is a two-step one-membrane composite with a thickness of 1.8 to 2.2 mm, a longitudinal tensile strength of not less than 2.5 kN / 5 cm, a longitudinal elongation of not more than 28%, a spherical puncture strength of >2.5 kN, and an overlap width of not less than 20 cm.

[0032] Preferably, the filter layer 5 is made of open-graded crushed stone with a thickness of 10-20cm.

[0033] In this embodiment, the water collection well 11 is a component made of C25 concrete cast in place, with a 10cm gravel layer underneath and a top cover 12 placed on top. The water collection well 11 is also provided with a transverse drainage pipe 13 arranged in the road surface. The water collection well 11 is set every 100-150m along the road direction, preferably every 100m.

[0034] Preferably, the top cover 12 is made of steel mesh as a cover plate, and the transverse drainage pipe 13 is a φ300 precast concrete pipe with a slope of 3%.

[0035] In this application, rainwater infiltrates through the green planting area 7, passes through the permeable geotextile, enters the filter layer, and after infiltration through the filter layer 5 and the permeable geotextile on the top of the cover plate, it converges into the drainage ditch. The water collection well 11 collects rainwater from the drainage ditch and corresponds to the outlet of the transverse drainage pipe 13 with the rapid flow channel 14 and the side ditch 15. The water in the water collection well 11 is introduced into the rapid flow channel 14, and then discharged into the side ditch 15 on the outer side of the embankment through the rapid flow channel 14, thereby realizing the discharge of rainwater.

[0036] Example 2 like Figures 6-7 As shown, components that are the same as or corresponding to those in Embodiment 1 are referred to using the same reference numerals as in Embodiment 1. For simplicity, only the differences from Embodiment 1 are described below. The difference between Embodiment 2 and Embodiment 1 is as follows: The water collection well 11 is also equipped with an anti-settlement component 16, which is used to stir the rainwater in the water collection well 11 to prevent unfiltered mud and sand in the rainwater from settling at the bottom of the water collection well 11 and affecting drainage.

[0037] The anti-settlement component 16 includes an impeller 161 disposed above the transverse drainage pipe 13, a reduction gear 162 symmetrically disposed on both sides of the impeller 161, a transmission gear 163 connected to the reduction gear 162, and a transmission assembly.

[0038] In this embodiment, the flow of rainwater overflowing from the transverse drain pipe 13 impacts the impeller 161 above, causing the impeller 161 to rotate. Subsequently, its power is transmitted to the reduction assembly 162, where the speed of the power is reduced and the torque is increased by the reducer inside the vibration damping assembly 162, resulting in a more stable power output that is better suited to the subsequent components. The power processed by the vibration damping assembly is transmitted through the transmission assembly 163, which stably delivers the power to the stirring assembly 164 through helical gear meshing, thereby achieving stirring in the stirring assembly 164.

[0039] The stirring assembly 164 includes a rotating shaft 1641 and a stirring impeller 1642 mounted on the rotating shaft 1641; the stirring assembly 13 is vertically and symmetrically arranged in the water collection well 11, with the edge of the stirring impeller 1642 close to the side wall of the water collection well 11; the bottom of the stirring impeller 1642 is in contact with the bottom surface of the water collection well 11.

[0040] In this embodiment, the transmission component 163 first transmits power to the rotating shaft 1641, driving the stirring impeller 1642 to rotate. Since the edge of the stirring impeller 1642 is close to the side wall of the water collection well 11 and the bottom is in contact with the bottom surface of the water collection well 11, it can cover the internal space of the water collection well in all directions, effectively avoiding sedimentation in the edge area due to inadequate stirring.

[0041] By implementing this application, rainwater collection and discharge in the median strip can be achieved, preventing rainwater from seeping downwards, protecting the stability and safety of the roadbed and pavement, and ensuring driving safety.

Claims

1. A central median drainage system, characterized in that, The system includes multiple drainage ditches located between the roadside curbs on both sides and extending along the road direction, with a collection well connecting adjacent drainage ditches; each drainage ditch is covered with a cover plate, and a filter layer is provided above the filter layer, with a green planting area above the filter layer; a first geotextile is laid on the area above the filter layer and above the cover plate, and curb stones are vertically installed on both sides of the roadside curb, forming the green planting area with the curb stones and the first geotextile; a second geotextile is laid below the filter layer, at least in the area above the cover plate.

2. A central median drainage system as described in claim 1, characterized in that, The lateral dimension of the green planting area is greater than the lateral dimension of the filter layer, which is greater than the lateral dimension of the drainage ditch.

3. A central median drainage system as described in claim 1, characterized in that, The longitudinal section of the drainage ditch is U-shaped, with flanges protruding from both upper edges, and a cover plate is placed between the two flanges.

4. A central median drainage system as described in claim 3, characterized in that, One edge of the second geotextile installed on one side of the greening planting area is laid below the lower seat of the curbstone, and the other edge is laid between the flange and the filter layer.

5. A central median drainage system as described in claim 4, characterized in that, The curbstone is supported by a cement mortar layer, and the outer edge of the second geotextile is located on the cement mortar layer.

6. A central median drainage system as described in claim 5, characterized in that, The longitudinal cross-section of the upper surface of the cover plate is an arc shape with a concave center, and the first geotextile placed on top of it at least completely covers the upper surface of the cover plate.

7. A central median drainage system as described in claim 1, characterized in that, The water collection well is a component made of C25 concrete cast-in-place, with a 10cm gravel layer underneath and a top cover on top. A horizontal drainage pipe is also installed on the water collection well.

8. A central median drainage system as described in claim 7, characterized in that, The water collection well is also equipped with an anti-settlement component, which is used to stir the rainwater in the water collection well.

9. A central median drainage system as described in claim 8, characterized in that, The anti-settlement component includes an impeller positioned above the transverse drainage pipe, a speed reduction assembly symmetrically positioned on both sides of the impeller, a transmission assembly connected to the speed reduction assembly, and a stirring assembly connected to the transmission assembly.

10. A central median drainage system as described in claim 9, characterized in that, The stirring assembly includes a rotating shaft and a stirring impeller mounted on the rotating shaft; the stirring assembly is vertically and symmetrically arranged inside the water collection well, with its edge close to the side wall of the water collection well; the bottom of the stirring impeller is in contact with the bottom surface of the water collection well.

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