Modularized pavement drainage system for gentle slope section of wide road and setting method

Abstract

The invention discloses a modular pavement drainage system for a gentle slope section of a wide road and a setting method, and belongs to the technical field of drainage engineering, the modular pavement drainage system comprises a middle lane drainage structure and a transverse drainage pipe; the transverse drainage pipe is located below the pavement cushion layer and perpendicular to the route direction of the road, one end of the transverse drainage pipe is connected with the middle lane drainage structure, and the other end is connected with a drainage ditch or an urban pipe network of the embankment; the middle lane drainage structure is located between the pavement of the middle lane of the half-width road of the wide road and the transverse drainage pipe, and the lower portion of the middle lane drainage structure is communicated with the transverse drainage pipe. The method has the beneficial effects that the drainage facility is arranged on the middle lane, a single long runoff path of the wide road surface is cut off, and the original drainage length of a single 4-5 lane is converted into the drainage length of a 2-3 lane, so that the retention time of rainwater on the road surface can be remarkably shortened, the drainage efficiency of the wide road surface is improved, and the drainage effect of the wide road surface is improved. The water film thickness caused by road surface runoff is reduced, and the driving safety in rainy days is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of highway drainage engineering, and in particular to a modular road surface drainage system and a setting method for a wide road with a gentle slope. Background Art

[0002] As time goes by, the highways built in the early stage gradually exposed problems such as insufficient traffic capacity and declining service level. Expanding the traditional two-way 4-lane and 6-lane highways to two-way 8-lane and 10-lane wide roads has become an inevitable choice to meet the needs of traffic development. After the expansion, the width of a single highway road can reach 24m, and the catchment area and water flow path have increased by nearly one-fold, resulting in longer surface water discharge time and a surge in peak road runoff. When the highway passes through a gently sloping urban agglomeration, the longitudinal slope of the entire line is small, and there are many gentle slope sections with a composite slope of less than 0.5%, making it more difficult to drain the wide road surface.

[0003] Meteorological data show that the warming of the climate system is still continuing, and the risk of extreme rainfall weather events will further increase. When the rainfall intensity exceeds the drainage capacity of the road surface, the convergence of rainwater on the road surface is easy to form a water film, which reduces the adhesion between the vehicle tires and the road surface, causing the car to "hydroplaning", side sliding and rollover causing accidents, affecting driving safety. Therefore, how to improve the drainage capacity of the road surface and reduce the risk of driving on rainy roads is a common problem faced by the reconstruction and expansion of wide roads.

[0004] At present, the common means to improve the drainage capacity of wide roads include: increasing the longitudinal and transverse slopes of the road, expanding the size of drainage facilities, setting up herringbone slopes, cutting grooves in the middle of the road or placing transverse drainage ditches on the road surface, etc. However, in practice, it is found that these means are difficult to implement or have little effect due to the restrictions of reconstruction and expansion project conditions and cost factors, or change the flatness of the road surface, thus affecting driving stability and comfort, and even reducing the life of the road.

[0005] In view of this, the inventor conducted in-depth research on this demand, and thus the present case was produced. Summary of the invention

[0006] In view of the problem that when improving the drainage capacity of wide roads in the prior art, under the constraints of the reconstruction and expansion project conditions and cost factors, common improvement measures are difficult to implement, or have little effect, or change the road surface flatness, thereby affecting driving stability and comfort, and even reducing the life of the road, the present invention provides a modular road surface drainage system and setting method for the gentle slope section of wide roads, and a wide road, which shortens the road surface rainwater runoff path to solve the problem of poor drainage in the gentle slope section of wide roads and improve driving safety in rainy days. The specific technical solution is as follows:

[0007] A modular road surface drainage system for a wide road with a gentle slope, comprising a middle lane drainage structure and a transverse drainage pipe;

[0008] The transverse drainage pipe is located below the pavement cushion layer and perpendicular to the route direction of the road. One end of the transverse drainage pipe is connected to the drainage structure of the middle lane, and the other end is connected to the drainage ditch of the embankment or the urban pipe network;

[0009] The middle lane drainage structure is located between the road surface of the middle lane of the half-width road of the wide road and the transverse drainage pipe, and its lower part is connected with the transverse drainage pipe.

[0010] By adopting the above technical solution, drainage facilities are set in the middle lane to cut off the longer runoff path of a single wide road surface, and the original drainage length of a single 4-5 lane is converted into a drainage length of 2-3 lanes. This can significantly reduce the time that rainwater stays on the road surface, improve the drainage efficiency of wide roads, reduce the thickness of water film caused by road surface runoff, and improve driving safety in rainy days.

[0011] According to one embodiment of the present application, the middle lane drainage structure includes a permeable asphalt pavement, a modular drainage channel and a roadside water collection well;

[0012] Permeable asphalt pavement is laid on the upper layer of densely distributed pavement, and its layer thickness is consistent with the upper layer of the pavement structure on both sides of the road;

[0013] The modular drainage channel is located at the position between the middle surface layer and the pavement base layer directly below the asphalt pavement, and the modular drainage channel is aligned with the side of the permeable asphalt pavement away from the central dividing strip;

[0014] The water collection well in the road is located directly below the module drainage channel, and the well wall on the side away from the central dividing strip is connected to the transverse drainage pipe.

[0015] The above technical solution has a simple drainage system structure, located in the pavement structure layer, without cutting grooves or digging trenches on the road surface to ensure the flatness of the road surface, and does not affect driving stability and comfort. Compared with the existing commonly used drainage improvement solution of increasing the road line shape, it does not change the overall line shape design of the expanded road, which is conducive to saving engineering costs. At the same time, the modular drainage channel has high strength and durability, can support the upper side layer structure, and reduce road damage during operation.

[0016] According to one embodiment of the present application, the permeable asphalt pavement is located in the middle lane of the half-width road of a wide road, with a width of 3.5-5.0m, parallel to the road route, and the upper surfaces on both sides are smoothly connected with the densely-paved road surface and are not less than the width of one lane.

[0017] By adopting the above technical solution and limiting the minimum width of the permeable asphalt pavement, it is possible to prevent water from flowing away from the surface of the permeable asphalt pavement before it penetrates into the permeable asphalt pavement.

[0018] According to one embodiment of the present application, the module drainage channel is arranged directly below the lane marking and corresponds to the solid lane marking on the road surface.

[0019] According to one embodiment of the present application, the modular drainage channel is assembled from PP water storage modules with hollow interiors, and its internal water storage space can reach 95% of the total volume, and its compressive strength requirement is greater than 0.3MPa. The outer surface of the modular drainage channel, except for the bottom, is wrapped with anti-filter geotextile. The structure occupies only 5% of the space, which can reduce the resistance to water flow and the occupation of water storage space compared to traditional gravel blind ditches.

[0020] According to one embodiment of the present application, the cross-sectional width and height of the module drainage channel meet the following conditions:

[0021]

[0022] Where: Q m is the drainage capacity of the module drainage channel, in m 3 / s; n is the water resistance coefficient of the module drainage channel, which is 0.03-0.05; b is the cross-sectional width of the module drainage channel, in m; h is the cross-sectional height of the module drainage channel, in m; i is the longitudinal slope of the module drainage channel; Q s Design flow rate.

[0023] The above technical solution adopts a modular design. The modular drainage channel materials can be prefabricated and transported in the factory. Each module can be installed and disassembled separately, making the construction process simple and fast, and also convenient for later maintenance and repair. The modular design also takes into account the efficiency and flexibility of space utilization. Modules of uniform size can be freely combined according to actual needs to form drainage channels of different shapes and sizes. This design not only simplifies the construction process and improves construction efficiency, but also allows the drainage channel to be cleaned and reused in the later stage of use. After the service life is reached, it can be directly dismantled, replaced with new materials and reassembled, and the maintenance method is simple.

[0024] According to another aspect of the present application, an embodiment of the present application further provides a method for setting up the modular road surface drainage system for a wide road with a gentle slope, which is used for a newly built road, comprising:

[0025] Determine the location of the general gentle slope section according to the design drawings, and clearly define and mark the coverage area of ​​the modular road drainage system for the gentle slope section of the wide road;

[0026] After the roadbed is completed, the construction of transverse drainage pipe reservation, pavement subbase paving, roadside water collection well pouring, modular drainage channel installation, base and middle and lower layer construction, full-section upper layer permeable asphalt pavement and dense asphalt pavement on both sides are carried out in sequence.

[0027] According to another aspect of the present application, an embodiment of the present application further provides a method for setting a modular road surface drainage system for a wide road with a gentle slope, which is used for road reconstruction and expansion, comprising:

[0028] Determine the location of the general gentle slope section according to the design drawings, clarify the coverage area of ​​the modular road drainage system for the gentle slope section of the wide road and mark it on the original road;

[0029] The original road surface is milled, and the corresponding area of ​​the modular road surface drainage system for the wide road with gentle slope is excavated, and the transverse drainage pipe, the road water collection well and the modular drainage channel are installed and poured respectively;

[0030] Then the roadbed filling and road base paving of the expanded part were carried out;

[0031] Finally, the entire section is paved with permeable asphalt pavement and dense asphalt pavement respectively.

[0032] According to another aspect of the present application, an embodiment of the present application further provides a wide road having a gently sloping section with a composite slope of less than 0.5% along its length, or a gently sloping section with a non-superelevation section or a non-superelevation gradient section, and the wide road is a wide road with more than 8 lanes in both directions, and the road pavement structure includes a pavement surface layer, a base layer, a subbase layer and a cushion layer from top to bottom, and the above-mentioned modular pavement drainage system for the gently sloping section of the wide road is laid at all or part of the gently sloping section.

[0033] Preferably, the length of the module drainage channel in the direction parallel to the road route is greater than or equal to 80% of the length of the gentle slope section, and the longitudinal slope is consistent with the longitudinal slope of the road.

[0034] The beneficial effects produced by the technical solution of the present invention are as follows:

[0035] (1) By installing drainage facilities in the middle lane, the longer runoff path of a single lane of wide road can be cut off, and the original drainage length of a single lane of 4-5 lanes can be converted into the drainage length of 2-3 lanes. This can significantly reduce the time that rainwater stays on the road surface, improve the drainage efficiency of wide road surfaces, reduce the thickness of water film caused by road surface runoff, and improve driving safety in rainy days.

[0036] (2) The drainage system has a simple structure and is located in the pavement structure layer. It does not need to be grooved or dug to ensure the smoothness of the road surface, and does not affect driving stability and comfort. Compared with the existing drainage improvement scheme that increases the road line shape, it does not change the overall line shape design of the expanded road, which is conducive to saving engineering costs. At the same time, the modular drainage channel has high strength and durability, which can support the upper side layer structure and reduce road damage during operation.

[0037] (3) The drainage system is simple to construct and does not require special processes. It adopts a modular design. The modular drainage channel materials can be prefabricated and transported in the factory. Each module can be installed and disassembled separately, making the construction process simple and fast, and also convenient for later maintenance and repair. The modular design also takes into account the efficiency and flexibility of space utilization. Modules of uniform size can be freely combined according to actual needs to form drainage channels of different shapes and sizes. This design not only simplifies the construction process and improves construction efficiency, but also allows the drainage channel to be cleaned and reused in the later stage of use. After the service life is reached, it can be directly dismantled, replaced with new materials and reassembled, and the maintenance method is simple. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0039] Figure 1 It is a schematic diagram of the planar structure of the present invention;

[0040] Figure 2 The present invention Figure 1 Schematic cross-sectional view of the middle AA section;

[0041] Figure 3 It is a partial cross-sectional schematic diagram of the present invention;

[0042] Figure 4 It is a schematic diagram of the splicing of the module drainage channel in the present invention. DETAILED DESCRIPTION

[0043] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents the selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0044] The modular road drainage system of the present invention can be used on highways and urban roads. The present invention is described by taking highways as an example. Figure 1-3 As shown, the present invention provides a modular road surface drainage system for a wide road with a gentle slope, comprising a middle lane drainage structure 1, a transverse drainage pipe 2 and a rapid flow trough 3;

[0045] The rapids trough 3 is embedded in the embankment slope, with the top end connected to the transverse drainage pipe 2 and the bottom end connected to the drainage ditch 4 under the embankment. The transverse drainage pipe 2 is located below the pavement cushion layer and perpendicular to the route direction of the highway.

[0046] The middle lane drainage structure 1 is located between the road surface of the middle lane of the half-width road surface of the wide highway and the transverse drainage pipe 2, and its lower part is connected to the transverse drainage pipe 2. By setting up drainage facilities in the middle lane, the longer runoff path of the wide road surface is cut off, and the original drainage length of 4-5 lanes in a single width is converted into the drainage length of 2-3 lanes, which can significantly reduce the time that rainwater stays on the road surface, improve the drainage efficiency of the wide road surface, reduce the water film thickness caused by road surface runoff, and improve driving safety in rainy days.

[0047] Specifically, the middle lane drainage structure 1 includes a permeable asphalt pavement 11, a modular drainage channel 12 and a roadside water collection well 13;

[0048] The permeable asphalt pavement 11 is laid on the upper layer of the densely distributed pavement, and its layer thickness is consistent with the upper layer of the road pavement structure on both sides;

[0049] The modular drainage channel 12 is located at the position between the middle surface layer and the road base layer directly below the asphalt pavement 11, and the modular drainage channel 12 is aligned with the side of the permeable asphalt pavement 11 away from the central dividing strip 5;

[0050] The road water collection well 13 is located directly below the module drainage channel 12, and its well wall away from the central dividing strip 5 is connected to the transverse drainage pipe 2. The width of the road water collection well 13 is slightly smaller than the width of the module drainage channel 12.

[0051] The drainage system here is located in the pavement structure layer, with a simple structure. No grooves or trenches are cut on the road surface to ensure the flatness of the road surface, which does not affect driving stability and comfort. Compared with the existing drainage improvement scheme that increases the road line shape, it does not change the overall line shape design of the expanded highway, which is conducive to saving engineering costs. At the same time, the modular drainage channel has high strength and durability, which can support the upper side layer structure and reduce road damage during operation.

[0052] It can be understood that the permeable asphalt pavement 11 is located in the middle lane of the half-width road of the wide highway, with a width of 3.5-5.0m, parallel to the direction of the highway route, and the upper surfaces on both sides are smoothly connected with the dense pavement and are not less than the width of one lane.

[0053] Preferably, the module drainage channel 12 is arranged directly below the lane marking and corresponds to the solid lane marking on the road surface.

[0054] Preferably, see Figure 4 The modular drainage channel 12 is composed of hollow PP water storage modules 121 assembled by splicing edges 122. The outer surface of the modular drainage channel 12 is wrapped with anti-filter geotextile except the bottom. The internal water storage space can reach 95% of the total volume, and its compressive strength is required to be greater than 0.3MPa. The structure occupies only 5% of the space, which can reduce the resistance to water flow and the occupation of water storage space compared with the traditional gravel blind ditch.

[0055] It should be noted that the surface of the PP water storage module 121 is a mesh structure, and a mortise and tenon structure can be set at the intersection of the mesh structure, so that two adjacent PP water storage modules 121 can be directly plugged and assembled through the mortise and tenon structure. In addition, multiple PP water storage modules 121 can also be connected into a whole by using a buckle or other structure.

[0056] The structure of the PP water storage module 121 belongs to the prior art, and the specific structure can refer to the Chinese utility model patent with authorization announcement number CN205348273U.

[0057] More preferably, the cross-sectional width and height of the module drainage channel 12 meet the following conditions:

[0058]

[0059] Where: Qm is the drainage capacity of the module drainage channel, in m 3 / s; n is the water resistance coefficient of the module drainage channel, which is 0.03-0.05; b is the cross-sectional width of the module drainage channel, in m; h is the cross-sectional height of the module drainage channel, in m; i is the longitudinal slope of the module drainage channel; Qs is the design flow rate.

[0060] The above technical solution adopts a modular design. The modular drainage channel materials can be prefabricated and transported in the factory. Each module can be installed and disassembled separately, making the construction process simple and fast, and also convenient for later maintenance and repair. The modular design also takes into account the efficiency and flexibility of space utilization. Modules of uniform size can be freely combined according to actual needs to form drainage channels of different shapes and sizes. This design not only simplifies the construction process and improves construction efficiency, but also allows the drainage channel to be cleaned and reused in the later stage of use. After the service life is reached, it can be directly dismantled, replaced with new materials and reassembled, and the maintenance method is simple.

[0061] It should be noted that the modular pavement drainage system for gently sloping sections of wide roads is mainly suitable for conventional road crown gently sloping sections with a composite slope of less than 0.5%, non-superelevation sections, and non-superelevation gradient sections.

[0062] This embodiment further provides a method for setting up the modular road surface drainage system for a wide road with a gentle slope, which is used for a newly built road and includes:

[0063] Determine the location of the general gentle slope section according to the design drawings, and clearly define and mark the coverage area of ​​the modular road drainage system for the gentle slope section of the wide road;

[0064] After the roadbed is completed, the construction of transverse drainage pipe reservation, pavement subbase paving, roadside water collection well pouring, modular drainage channel installation, base and middle and lower layer construction, full-section upper layer permeable asphalt pavement and dense asphalt pavement on both sides are carried out in sequence.

[0065] This embodiment further provides a method for setting up the modular road surface drainage system for a wide road with a gentle slope, which is used for road reconstruction and expansion, and includes:

[0066] Determine the location of the general gentle slope section according to the design drawings, clarify the coverage area of ​​the modular road drainage system for the gentle slope section of the wide road and mark it on the original road;

[0067] The original road surface is milled, and the corresponding area of ​​the modular road surface drainage system for the wide road with gentle slope is excavated, and the transverse drainage pipe, the road water collection well and the modular drainage channel are installed and poured respectively;

[0068] Then the roadbed filling and road base paving of the expanded part were carried out;

[0069] Finally, the entire section is paved with permeable asphalt pavement and dense asphalt pavement respectively.

[0070] The present embodiment further provides a wide highway having a gently sloping section with a composite slope of less than 0.5% or a gently sloping section with a non-superelevation section or a non-superelevation gradient section along its length, and the wide highway is a wide highway with more than 8 lanes in both directions, and the highway pavement structure 100 includes, from top to bottom, a pavement surface layer 101, a base layer 102, a subbase layer 103 and a cushion layer 104, and the above-mentioned modular pavement drainage system for the gently sloping section of a wide road is laid at all or part of the gently sloping section.

[0071] Preferably, the length of the module drainage channel in the direction parallel to the highway route is greater than or equal to 80% of the length of the gentle slope section, and the longitudinal slope is consistent with the longitudinal slope of the road.

[0072] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A modular road drainage system for wide road sections with gentle slopes, characterized in that: Includes middle lane drainage structure and lateral drainage pipes; The transverse drainage pipe is located below the pavement cushion layer and perpendicular to the route direction of the road. One end of the transverse drainage pipe is connected to the drainage structure of the middle lane, and the other end is connected to the drainage ditch of the embankment or the urban pipe network; The middle lane drainage structure is located between the road surface of the middle lane of the half-width road of the wide road and the transverse drainage pipe.

2. The modular road drainage system for wide road with gentle slope according to claim 1, characterized in that: The middle lane drainage structure includes permeable asphalt pavement, modular drainage channels and a roadside water collection well; The permeable asphalt pavement is laid on the upper layer of the densely distributed road surface, and its layer thickness is consistent with the upper layer of the road pavement structure on both sides; The modular drainage channel is located at the position between the middle surface layer and the road base layer directly below the asphalt pavement, and the modular drainage channel is aligned with the side of the permeable asphalt pavement away from the central dividing strip; The water collection well in the road is located directly below the module drainage channel, and the well wall on the side away from the central dividing strip is connected to the transverse drainage pipe.

3. The modular road drainage system for wide road with gentle slope according to claim 2, characterized in that: The permeable asphalt pavement is located in the middle lane of the half-width road of the wide road, parallel to the road route, and the upper surfaces on both sides are smoothly connected with the dense pavement and are not less than the width of one lane.

4. The modular road drainage system for wide road with gentle slope according to claim 2, characterized in that: The module drainage channel is arranged directly below the lane marking and corresponds to the solid lane marking on the road surface.

5. The modular road drainage system for wide road with gentle slope according to claim 2, characterized in that: The module drainage channel includes a plurality of internally hollowed-out PP water storage modules assembled with each other, and the outer surface of the module drainage channel except the bottom is wrapped with anti-filtration geotextile.

6. The modular road drainage system for wide road with gentle slope according to claim 2, characterized in that: The cross-sectional width and height of the module drainage channel meet the following conditions: Where: Q m is the drainage capacity of the module drainage channel, in m 3 / s; n is the water resistance coefficient of the module drainage channel, which is 0.03-0.05; b is the cross-sectional width of the module drainage channel, in m; h is the cross-sectional height of the module drainage channel, in m; i is the longitudinal slope of the module drainage channel; Q s Design flow rate.

7. A method for setting up a modular road drainage system for a wide road with a gentle slope as claimed in any one of claims 2 to 6, used for newly built roads, characterized in that: include: Determine the location of the general gentle slope section according to the design drawings, and clearly define and mark the coverage area of ​​the modular road drainage system for the gentle slope section of the wide road; After the roadbed is completed, the construction of transverse drainage pipe reservation, pavement subbase paving, roadside water collection well pouring, modular drainage channel installation, base and middle and lower layer construction, full-section upper layer permeable asphalt pavement and dense asphalt pavement on both sides are carried out in sequence.

8. A method for setting up a modular road drainage system for a wide road with a gentle slope as claimed in any one of claims 2 to 6, used for road reconstruction and expansion, characterized in that: include: Determine the location of the general gentle slope section according to the design drawings, clarify the coverage area of ​​the modular road drainage system for the gentle slope section of the wide road and mark it on the original road; The original road surface is milled, and the corresponding area of ​​the modular road surface drainage system for the wide road with gentle slope is excavated, and the transverse drainage pipe, the road water collection well and the modular drainage channel are installed and poured respectively; Then the roadbed filling and road base paving of the expanded part were carried out; Finally, the entire section is paved with permeable asphalt pavement and dense asphalt pavement respectively.

9. A wide road, characterized in that: A gently sloping road section with a composite slope of less than 0.5% or a gently sloping road section with a non-superelevation section or a non-superelevation gradient section along its length, and the wide road is a wide road with more than 8 lanes in both directions, and the road pavement structure includes a pavement surface layer, a base layer, a subbase layer and a cushion layer from top to bottom, and the modular pavement drainage system for a gently sloping road section of a wide road as described in any one of claims 1 to 6 is laid at all or part of the gently sloping road section.

10. The wide road according to claim 9, characterized in that: The length of the module drainage channel in the direction parallel to the road route is greater than or equal to 80% of the length of the gentle slope section, and the longitudinal slope is consistent with the longitudinal slope of the road.

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