A construction method and system for water retention and drainage of a permeable urban road

Abstract

The present invention provides a construction method for water retention and drainage of urban permeable roads, which comprises the following steps: S1 Measuring and setting out; S2 Laying an impermeable base layer on the roadbed, and slopes are respectively arranged on both sides from the center of the impermeable base layer towards the two sides. Blind ditches are excavated on both sides of the impermeable base layer, and permeable concrete plates are installed between the impermeable base layer and the blind ditches; S3 Laying water retention sponge body modules prefabricated from peat ash, diatomite, and wood fiber permeable concrete on the impermeable base layer to form a water absorption surface layer, and finally laying a permeable surface layer on the water absorption surface layer; S4 Excavating a plurality of catch wells on the blind ditches, and installing permeable pipes on the blind ditches to connect the catch wells; S5 Laying a gravel layer, a crushed stone layer, and a soil layer on the permeable pipes in sequence from bottom to top, and planting vegetation on the soil layer. The present invention also provides a water retention and drainage system for urban permeable roads. Compared with the prior art, the present invention can achieve water drainage and retention of the road while improving its drainage capacity and avoiding road waterlogging.

Description

Technical Field

[0001] The present invention relates to the technical field of permeable roads, and in particular, to a construction method and system for water retention and drainage of urban permeable roads. Background Art

[0002] Traditional urban road surfaces are generally composed of impermeable materials such as asphalt mixtures or cement concretes, and the road surface drainage is achieved through the cross slope of the road crown. However, during rainy days, the rainwater within the road surface range cannot be timely laterally drained out of the road surface range, resulting in ponding on the road surface; this leads to a serious reduction in the anti-skid performance of the road surface, making it easy for vehicles to drift during driving, affecting driving safety, and prone to causing traffic accidents. In addition, paving impermeable road surfaces changes the original urban hydro-ecological environment, increases the pressure on the urban drainage system, and is prone to causing urban waterlogging during heavy rainstorms.

[0003] Currently, in today's society that strongly advocates "sponge cities", it is very important to give full play to the role of municipal roads in sponge cities, so various permeable road surfaces emerge in an endless stream. However, permeable road surfaces cannot retain enough water for long-term evaporation and cooling, and have no alleviating effect on the "heat island effect" of cities; when encountering heavy rainstorms, the drainage capacity of permeable road surfaces is insufficient, and ponding still forms on the road surface, affecting driving safety. Summary of the Invention

[0004] In view of this, the present invention provides a construction method and system for water retention and drainage of urban permeable roads, which can, compared with the prior art, achieve road drainage and water retention while improving its drainage capacity, avoiding road ponding, promoting the circulation of the urban natural hydrological system, and achieving the effect of alleviating the "heat island effect" of cities.

[0005] To this end, on the one hand, the present invention provides a construction method for water retention and drainage of urban permeable roads, which includes the following steps:

[0006] S1 Measuring and setting out: Mark the positions at the construction site according to the design drawings, and use an excavator and manual labor to excavate the roadbed;

[0007] S2 Lay an impermeable base layer on the roadbed, and slopes are respectively provided on both sides from the center of the impermeable base layer. Blind ditches are excavated on both sides of the impermeable base layer, and permeable concrete slabs are installed between the impermeable base layer and the blind ditches;

[0008] S3 Lay water retention sponge body modules prefabricated from peat ash, diatomite, and wood fiber permeable concrete on the impermeable base layer to form a water absorption surface layer, and finally lay a permeable surface layer on the water absorption surface layer;

[0009] S4 Excavate a plurality of catch wells on the blind ditches, and install permeable pipes on the blind ditches to connect the catch wells;

[0010] In the permeable pipe S5, a gravel layer, a crushed stone layer, and a soil layer are successively laid from bottom to top, and vegetation is planted on the soil layer.

[0011] On the other hand, the present invention provides an urban permeable road water retention and drainage system, which includes: a road main body and blind ditches. Blind ditches are respectively arranged on both sides of the road main body. The road main body includes a permeable surface layer, a water absorption surface layer, and an impermeable base layer arranged successively from top to bottom. The impermeable base layer is paved on the ground. The water absorption surface layer is composed of a number of water retention sponge body modules. The upper and lower surfaces of the water retention sponge body module are respectively provided with serrated surfaces. A clamping portion is arranged on one side of the water retention sponge body module, and a clamping groove matching the clamping portion is arranged on the other side of the water retention sponge body module. Slopes are respectively arranged from the center of the impermeable base layer towards both sides, and the top of the blind ditch is lower than the impermeable base layer.

[0012] Further, the above-mentioned water retention sponge body module is composed of a mixture of permeable concrete mud, coal ash, diatomite, and wood fiber.

[0013] Further, a permeable concrete slab is arranged between the above-mentioned road main body and the blind ditch, and the permeable concrete slab is arranged along the length direction of the road main body.

[0014] Further, a number of horizontal steel bars and a number of vertical steel bars are arranged in the above-mentioned permeable concrete slab, and the number of horizontal steel bars and the number of vertical steel bars are welded to form a permeable concrete slab frame.

[0015] Further, a permeable pipe is arranged in the above-mentioned blind ditch.

[0016] Further, in the above-mentioned permeable pipe, a gravel layer, a crushed stone layer, and a soil layer are successively laid from bottom to top.

[0017] Further, the above-mentioned clamping portion includes a first clamping plate, and second clamping plates are respectively arranged on both sides of the first clamping plate, and the second clamping plates are vertically connected to the first clamping plate.

[0018] Further, the above-mentioned first clamping plate and the two second clamping plates form a cross-shaped structure.

[0019] Further, a plurality of catch basins are arranged on the above-mentioned blind ditch.

[0020] In a water-retaining and drainage system for a permeable urban road, first, an impermeable base layer is laid on the ground. The impermeable base layer is provided with a cross slope. Then, prefabricated water-retaining sponge body modules are assembled and pasted on the impermeable base layer in sequence. Finally, a permeable base layer is laid. By setting prefabricated water-retaining sponge body modules in the road main body, the water-retaining capacity of the road is improved. Among them, the water slowly evaporates with the temperature, which can relieve the "heat island effect" in the city. The internally filled peat ash has a porous structure, and at the same time, it can be used as an absorbent to absorb heavy metals dissolved in rainwater. The wood fiber is obtained by crushing, anti-corrosion treatment, and reusing garden waste, which belongs to "turning waste into treasure". The diatomite has good water absorption and evaporation performance, and is economical and durable. After the water-retaining sponge body module is saturated with water, the rainwater quickly flows into the blind ditch through the cross slope on the impermeable base layer, which can quickly drain water when the urban road encounters heavy rain. The frictional force can be improved through the serrated surface, and then the stability of the road can be improved. A clamping part is arranged on one side of the water-retaining sponge body module, and a clamping groove matching the clamping part is arranged on the other side of the water-retaining sponge body module, which is convenient for installation and improves the construction efficiency.

[0021] Therefore, the present invention provides a construction method and system for water-retaining and drainage of a permeable urban road, which can make the urban road like a sponge compared with the prior art, and has good "elasticity" in adapting to environmental changes and coping with natural disasters. When it rains, it absorbs, stores, seeps, and purifies water. When needed, the stored water is "released" and utilized, which can greatly relieve the "heat island effect". At the same time, the drainage performance is also efficient, realizing the rapid drainage of the road base layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] By reading the following detailed description of the preferred embodiments, various other advantages and benefits will become clear to those of ordinary skill in the art. The drawings are only for the purpose of showing the preferred embodiments and are not considered to be a limitation of the present invention. Moreover, throughout the drawings, the same reference numerals are used to represent the same components. In the drawings:

[0023] Figure 1 It is a schematic structural diagram of a water-retaining and drainage system for a permeable urban road provided by an embodiment of the present invention;

[0024] Figure 2 It is a perspective view of a water-retaining and drainage system for a permeable urban road provided by an embodiment of the present invention;

[0025] Figure 3 It is a schematic structural diagram of a water-retaining sponge body module in a water-retaining and drainage system for a permeable urban road provided by an embodiment of the present invention;

[0026] Figure 4 is Figure 1 An enlarged view of part A in

[0027] Among them, 1 - road main body; 11 - permeable surface layer; 12 - water absorption surface layer; 121 - water retention sponge module; 1211 - clamping part; 12111 - first clamping plate; 12112 - second clamping plate; 1212 - clamping groove; 13 - impermeable base layer; 2 - blind ditch; 21 - permeable pipe; 22 - gravel layer; 23 - crushed stone layer; 24 - soil layer; 3 - ground; 4 - permeable concrete slab; 41 - horizontal steel bar; 42 - vertical steel bar; 5 - catch basin. Specific Embodiment

[0028] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided so that the present disclosure can be more thoroughly understood and the scope of the present disclosure can be fully conveyed to those skilled in the art.

[0029] Embodiment 1:

[0030] See Figures 1 to 4 , which shows a construction method for water retention and drainage of an urban permeable road provided in Embodiment 1 of the present invention, and it includes the following steps:

[0031] S1: Measuring and setting out: Mark the positions at the construction site according to the design drawings, and use an excavator and manual labor to excavate the roadbed.

[0032] S2: Lay the impermeable base layer 13 on the roadbed, and slopes are respectively arranged on both sides of the impermeable base layer 13 from the center. Excavate blind ditches 2 on both sides of the impermeable base layer 13, and install permeable concrete slabs 4 between the impermeable base layer 13 and the blind ditches 2.

[0033] S3: Lay water retention sponge modules precast from peat ash, diatomite, and wood fiber permeable concrete on the impermeable base layer 13 to form a water absorption surface layer, and finally lay the permeable surface layer 11 on the water absorption surface layer.

[0034] S4: Excavate a plurality of catch basins 5 on the blind ditch 2, and install permeable pipes on the blind ditch 2 to connect the catch basins 5.

[0035] S5: Lay a gravel layer 22, a crushed stone layer 23, and a soil layer 24 on the permeable pipe 21 from bottom to top, and plant vegetation on the soil layer.

[0036] On the other hand, a water-retaining and drainage system for a permeable urban road provided in the first embodiment of the present invention mainly includes a road main body 1 and blind ditches 2. Blind ditches 2 are respectively arranged on both sides of the road main body 1. The road main body 1 includes a permeable surface layer 11, a water-absorbing surface layer 12, and an impermeable base layer 13 which are arranged in sequence from top to bottom. The impermeable base layer 13 is laid on the ground 3. The water-absorbing surface layer 12 is composed of a number of water-retaining sponge modules 121. Sawtooth surfaces are respectively arranged on the upper and lower surfaces of the water-retaining sponge module 121. A clamping portion 1211 is arranged on one side of the water-retaining sponge module 121, and a clamping groove 1212 matching the clamping portion 1211 is arranged on the other side of the water-retaining sponge module 121. Ramps are respectively arranged on both sides of the center of the impermeable base layer 13 towards the two sides. The top of the blind ditch 2 is lower than the impermeable base layer 13.

[0037] Specifically, referring to Figures 1 to 4 , a permeable pipe 21 is arranged in the blind ditch 2, which can improve the drainage effect.

[0038] Specifically, referring to Figures 1 to 4 , a gravel layer 22, a crushed stone layer 23, and a soil layer 24 are sequentially laid from bottom to top in the permeable pipe 21, which can purify rainwater and prevent sundries from blocking the blind ditch.

[0039] Specifically, referring to Figures 1 to 4 , a plurality of catch basins 5 are arranged on the blind ditch 2, which can store rainwater and can be pumped out to supplement groundwater during drought.

[0040] In this embodiment, a water-retaining and drainage system for a permeable urban road is provided. First, an impermeable base layer is laid on the ground. The impermeable base layer is provided with a cross slope. Then, the prefabricated water-retaining sponge modules are sequentially assembled and laid on the impermeable base layer. Finally, a permeable base layer is laid. By arranging prefabricated water-retaining sponge modules in the road main body, the water-retaining capacity of the road is improved. Among them, the water slowly evaporates with the temperature, which can relieve the "heat island effect" in the city. The internally filled peat ash has a porous structure, and at the same time, it can be used as an absorbent to absorb heavy metals dissolved in rainwater. The wood fiber is obtained by crushing, anti-corrosion, and recycling of garden waste, which belongs to "turning waste into treasure". The diatomite has good water absorption and evaporation performance, and is economical and durable. After the water-retaining sponge module is saturated with water, the rainwater quickly flows into the blind ditch through the cross slope on the impermeable base layer, which can quickly drain water when the urban road encounters heavy rain. The sawtooth surface can improve the friction force, and thus can improve the stability of the road. A clamping portion is arranged on one side of the water-retaining sponge module, and a clamping groove matching the clamping portion is arranged on the other side of the water-retaining sponge module, which can facilitate installation and improve the construction efficiency.

[0041] Therefore, this embodiment provides a construction method and system for water retention and drainage of urban permeable roads. Compared with the prior art, it can enable urban roads to be like sponges, having good "elasticity" in adapting to environmental changes and coping with natural disasters. When it rains, it absorbs, stores, seeps, and purifies water, and when needed, it "releases" the stored water and utilizes it, which can greatly alleviate the "heat island effect". At the same time, the drainage performance is also highly efficient, enabling rapid drainage of the road base layer.

[0042] Embodiment Two:

[0043] See Figures 1 to 4 , which shows a water retention and drainage system for urban permeable roads provided in Embodiment Two of the present invention. On the basis of the above embodiment, the following further improved technical solutions are made: The water retention sponge module 121 is composed of a mixture of permeable concrete mud, coal ash, diatomaceous earth, and wood fiber. Through the setting of the above structure, the water retention sponge module 121 is prefabricated into a modular block by mixing permeable concrete mud, coal ash, diatomaceous earth, and wood fiber, which can improve the construction efficiency. At the same time, coal ash, diatomaceous earth, and wood fiber are all porous water-absorbing and water-retaining materials. When it rains, they absorb, store, seep, and purify water, and when needed, they "release" the stored water and utilize it, which can greatly alleviate the "heat island effect".

[0044] Embodiment Three:

[0045] See Figures 1 to 4 , which shows a water retention and drainage system for urban permeable roads provided in Embodiment Three of the present invention. On the basis of the above embodiment, the following further improved technical solutions are made: The clamping part 1211 includes a first clamping plate 12111, and second clamping plates 12112 are respectively arranged on both sides of the first clamping plate 12111. The second clamping plates 12112 are vertically connected to the first clamping plate 12111, and the first clamping plate 12111 and the two second clamping plates 12112 form a cross-shaped structure. Through the setting of the above structure, rapid installation between the water retention sponge modules can be realized, improving the installation efficiency. The first clamping plate 12111 and the two second clamping plates 12112 form a cross-shaped structure, which can prevent the water retention sponge modules from sliding and improve the connection stability between the water retention sponge modules.

[0046] Embodiment Four:

[0047] See Figures 1 to 4, a water retention and drainage system for a permeable urban road provided in the fourth embodiment of the present invention is shown in the figure. On the basis of the above embodiment, the following technical solutions are further improved: A permeable concrete slab 4 is arranged between the road main body 1 and the blind ditch 2. The permeable concrete slab 4 is arranged along the length direction of the road main body 1. A number of horizontal steel bars 41 and a number of vertical steel bars 42 are arranged in the permeable concrete slab 4. The number of horizontal steel bars 41 and the number of vertical steel bars 42 are welded to form a permeable concrete slab frame. Through the setting of the above structure, in case of heavy rain, when the water retention sponge module is saturated with water absorption, the rainwater can flow into the blind ditches on both sides of the road and be quickly drained away.

[0048] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention is also intended to include these modifications and variations.

Claims

1. A water - permeable urban road water - retaining and drainage system, Characterized in that, It includes: a road main body (1) and a blind ditch (2). The blind ditches (2) are respectively arranged on both sides of the road main body (1). The road main body (1) includes a water - permeable surface layer (11), a water - absorbing surface layer (12), and an impermeable base layer (13) arranged in sequence from top to bottom. The impermeable base layer (13) is laid on the ground (3). The water - absorbing surface layer (12) is composed of a number of water - retaining sponge modules (121). The upper and lower surfaces of the water - retaining sponge module (121) are respectively provided with serrated surfaces. A clamping part (1211) is arranged on one side of the water - retaining sponge module (121), and a clamping groove (1212) matching the clamping part (1211) is arranged on the other side of the water - retaining sponge module (121). Ramps are respectively arranged from the center of the impermeable base layer (13) towards both sides. The top of the blind ditch (2) is lower than the impermeable base layer (13). The water - retaining sponge module (121) is composed of a mixture of permeable concrete mud, coal ash, diatomite, and wood fiber. A permeable concrete slab (4) is arranged between the road main body (1) and the blind ditch (2), and the permeable concrete slab (4) is arranged along the length direction of the road main body (1).

2. A water - permeable urban road water - retaining and drainage system according to claim 1, Characterized in that, A number of horizontal steel bars (41) and a number of vertical steel bars (42) are arranged in the permeable concrete slab (4), and the number of horizontal steel bars (41) and the number of vertical steel bars (42) are welded to form a permeable concrete slab frame.

3. A water - permeable urban road water - retaining and drainage system according to claim 1, Characterized in that, A permeable water pipe (21) is arranged in the blind ditch (2).

4. A water - permeable urban road water - retaining and drainage system according to claim 3, Characterized in that, A gravel layer (22), a crushed stone layer (23), and a soil layer (24) are successively laid from bottom to top in the permeable water pipe (21).

5. A water - permeable urban road water - retaining and drainage system according to claim 1, Characterized in that, The clamping part (1211) includes a first clamping plate (12111), and second clamping plates (12112) are respectively arranged on both sides of the first clamping plate (12111), and the second clamping plates (12112) are vertically connected to the first clamping plate (12111).

6. A water - permeable urban road water - retaining and drainage system according to claim 5, Characterized in that, The first clamping plate (12111) and the two second clamping plates (12112) form a cross - shaped structure.

7. A water - permeable urban road water - retaining and drainage system according to claim 1, Characterized in that, A plurality of catch wells (5) are arranged on the blind ditch (2).

8. A construction method of a water - permeable urban road water - retaining and drainage system according to any one of claims 1 - 7, Characterized in that, It includes the following steps: S1: Measuring and setting out: Mark the positions on the construction site according to the design drawings, and use an excavator and manual labor to excavate the roadbed; S2: Lay an impermeable base layer (13) on the roadbed, and slopes are respectively arranged on both sides from the center of the impermeable base layer (13). Blind ditches (2) are excavated on both sides of the impermeable base layer (13), and permeable concrete slabs (4) are installed between the impermeable base layer (13) and the blind ditches (2); S3: Lay water-retaining sponge body modules precast from peat ash, diatomite, and wood fiber permeable concrete on the impermeable base layer (13) to form a water-absorbing surface layer, and finally lay a permeable surface layer (11) on the water-absorbing surface layer; S4: Excavate a plurality of catch wells (5) on the blind ditches (2), and install permeable pipes on the blind ditches (2) to connect the catch wells (5); S5: A gravel layer (22), a crushed stone layer (23), and a soil layer (24) are successively laid on the permeable pipes (21) from bottom to top, and vegetation is planted on the soil layer.

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