CN207749378U - A kind of pavement structure in sponge city - Google Patents

Abstract

The utility model relates to the field of sponge city construction, and aims to solve the problem that the rainwater infiltrated into the road surface is not fully utilized, and specifically relates to a road surface structure of a sponge city, including a road bed, which is successively provided with a cushion layer and a base layer above the road bed from bottom to top. and the permeable asphalt layer on the road surface, a reservoir is provided between the road bed layer and the cushion layer, and an overflow pipe is provided on the top of the reservoir, and the reservoir is connected with rainwater for reuse through the overflow pipe. The reservoir and the permeable asphalt layer are vertically penetrated with a number of heat conducting rods, which are evenly arranged under the road surface, and the heat conducting rods are made of metal materials with high thermal conductivity. The rainwater flows into the storage tank after being filtered in layers. The storage tank can store part of the rainwater. When necessary, the stored water is released and used, thereby improving the function of the urban ecosystem. The overflowing water of the storage tank flows into the overflow pipe. The rainwater reuse pool keeps the pavement structure stable for water seepage and drainage.

Description

A pavement structure of a sponge city

technical field

The utility model relates to the field of sponge city construction, more specifically, it relates to a pavement structure of a sponge city.

Background technique

Sponge city is a new generation of urban rainwater management concept, which means that the city has good "elasticity" in adapting to environmental changes and responding to natural disasters caused by rainwater. It can also be called "water elastic city". It plays the role of water absorption, water storage, water seepage, and water purification. When necessary, the stored water is released and used, thereby improving the function of the urban ecosystem and reducing the occurrence of urban flood disasters.

The Chinese patent with the existing notification number CN205653671U provides a sponge-type urban permeable asphalt pavement, which includes from top to bottom: the upper layer of fine-grained permeable asphalt concrete, the lower layer of permeable asphalt concrete with large voids, and the drainage type asphalt macadam layer , Graded gravel layer, anti-seepage and reverse filter layer and roadbed. The utility model adopts a multi-layer permeable pavement by optimizing the pavement structure design. The upper layer has a small void ratio, which prevents solid particles from entering the permeable structure layer, and at the same time can ensure the smooth penetration of rainwater on the permeable pavement. It can meet the road performance requirements of sponge city for high water permeability of permeable asphalt pavement.

But above-mentioned technical scheme has only improved the rapid water seepage ability of road surface, has not fully utilized the rainwater that infiltrates under the road surface.

Utility model content

The purpose of the utility model is to provide a pavement structure of a sponge city, which has the effect of fully utilizing the rainwater infiltrated into the pavement.

The above-mentioned technical purpose of the utility model is achieved through the following technical solutions: a pavement structure of a sponge city, including a road bed, above which a cushion layer, a base layer and a permeable asphalt layer on the road surface are arranged sequentially from bottom to top, A reservoir is provided between the roadbed layer and the cushion layer, and an overflow pipe is provided on the top of the reservoir, and the reservoir is connected to a rainwater reuse pool through the overflow pipe. The asphalt layer is vertically penetrated with several heat conduction rods, which are evenly arranged under the road surface, and the heat conduction rods are metal materials with high thermal conductivity.

By adopting the above-mentioned technical scheme, the rainwater flows into the storage tank after hierarchical filtration, and the storage tank can store part of the rainwater, and then release and utilize the stored water when needed, thereby improving the function of the urban ecological system, and the overflow of the storage tank Water flows into the rainwater reuse pool from the overflow pipe, so that the pavement structure maintains a stable water seepage and drainage capacity.

Further, the heat conduction rod is penetrated with a cavity along its axial direction, and the cavity is filled with a wick.

By adopting the above technical solution, the wick body utilizes capillary action to accelerate the transfer of rainwater accumulated in the reservoir to the road surface when the temperature is high in summer, so that the water on the road surface evaporates and the temperature of the road surface is reduced.

Further, the heat conduction rod is provided with a plurality of through holes communicating with the cavity along its peripheral wall array.

By adopting the above technical solution, the wick body can transmit moisture to each structural layer through the through hole, further speeding up the transportation of moisture.

Further, the permeable asphalt layer includes a fine-grained permeable asphalt layer on the upper layer and a coarse-grained permeable asphalt layer on the lower layer.

By adopting the above technical scheme, the upper layer of fine-grained permeable asphalt layer has a smaller pore size, which effectively prevents large-diameter blockages from clogging the permeable asphalt layer, and the lower layer of coarse-grained permeable asphalt layer has good water permeability, thereby ensuring that the permeable asphalt layer achieves smooth penetration of rainwater and maintains Water permeable effect on the pavement prolongs the service life of the pavement.

Further, a purification layer is provided between the reservoir and the cushion layer.

By adopting the above technical solution, the purification layer can filter and absorb the impurities entrained in the rainwater flowing into the purification layer, so that the water flowing into the reservoir can be kept clean.

Further, the purification layer is sequentially arranged as a ceramsite layer, an activated carbon layer and a medical stone layer from top to bottom.

By adopting the above technical scheme, each layer fully absorbs impurities in the rainwater, and makes the water flowing into the reservoir rich in minerals, so that the water entering the rainwater reuse pond is suitable for plant irrigation.

Further, the depth of the rainwater reuse pool is deeper than that of the storage tank, and the rainwater reuse pool is provided with a suction pipe leading to the ground.

By adopting the above technical scheme, the depth of the rainwater reuse pool is deeper than that of the storage tank, so that too much water in the storage tank can flow into the rainwater reuse pool. The water in the reuse pool is pumped out to irrigate the vegetation, and the excess rainwater can be drained to the municipal underground pipe network.

Further, an anti-reverse seepage layer is laid between the bottom of the reservoir and the road bed.

By adopting the above technical solution, the anti-reverse seepage layer effectively prevents the water under the roadbed from seeping into the reservoir, and avoids the situation where the accumulated water in the reservoir is turbid and has many impurities.

In summary, the utility model has the following beneficial effects:

1. By setting up a reservoir on the road bed, the upper part of the reservoir is composed of a purification layer, a cushion layer, a base layer and a permeable asphalt layer from bottom to top. The rainwater is filtered by layers and then flows into the reservoir. The reservoir can store part of the rainwater , and then release and use the stored water when needed, thereby improving the function of the urban ecosystem;

2. A number of heat-conducting rods are installed vertically between the reservoir and the asphalt permeable layer. The heat-conducting rods are evenly arranged under the road surface. The heat-conducting rods are made of metal materials with high thermal conductivity. The heat transfer between them can effectively reduce the temperature of the road surface in summer.

Description of drawings

Fig. 1 is the overall structure schematic diagram of the present embodiment;

Fig. 2 is the partial structure schematic diagram of present embodiment;

FIG. 3 is a schematic structural diagram of the heat conducting rod of this embodiment.

In the figure: 1. Road bed; 11. Anti-reverse seepage layer; 2. Reservoir; 21. Overflow pipe; 22. Rainwater reuse pool; 23. Pumping pipe; 3. Purification layer; 31. Ceramsite layer; 32. Activated carbon layer; 33. Medical stone layer; 4. Cushion layer; 5. Base layer; 6. Permeable asphalt layer; 61. Fine-grained permeable asphalt layer; Wick body; 72, through hole.

Detailed ways

Below in conjunction with accompanying drawing, the utility model is described in further detail.

Example:

A pavement structure of a sponge city, as shown in FIG. 1 , includes a road bed 1 at the bottom, and the road bed 1 is a plain soil layer that has been flattened and compacted. As shown in Figures 1 and 2, a reservoir 2 is provided on the road bed 1, and above the reservoir 2 are a purification layer 3, a cushion layer 4, a base layer 5, and a permeable asphalt layer 6 from bottom to top. The rainwater flows into the reservoir 2 after being filtered in layers. The reservoir 2 can store part of the rainwater, and release and utilize the stored water when needed, thereby improving the function of the urban ecosystem. There is an overflow pipe 21 on the top of the reservoir 2, and the reservoir 2 is connected to a rainwater reuse pool 22 through the overflow pipe 21, so that when the rainwater is too high, the overflowing water of the reservoir 2 flows into the rainwater from the overflow pipe 21 The pool 22 is reused to keep the pavement structure of the present utility model with stable water seepage and drainage capacity. The depth of the rainwater reuse pool 22 is deeper than the reservoir 2, and the volume of the rainwater reuse pool 22 can store more rainwater. The rainwater reuse pool 22 is connected with a suction pipe 23 leading to the ground. 23 The water in the rainwater reuse pool 22 is pumped out to irrigate the vegetation, and the excess rainwater can be discharged to the municipal underground pipe network. In addition, when the ground is dry in summer, the rainwater accumulated in the reservoir 2 will evaporate upwards to achieve the effect of cooling the ground.

As shown in Figure 2, the permeable asphalt layer 6 is located on the pavement surface, and it includes a fine-grained permeable asphalt layer 61 on the upper layer and a coarse-grained permeable asphalt layer 62 on the lower layer. The fine-grained permeable asphalt layer 61 adopts a maximum particle size of 4 mm or 8 mm. The coarse-grained permeable asphalt layer 62 adopts a maximum particle size of 11mm or 16mm, and the void ratio of the two layers of materials exceeds 20% after compaction. Since the upper fine-grained permeable asphalt layer 61 has a small pore size, it can effectively prevent large-diameter blockages from blocking the permeable asphalt layer 6, and the lower coarse-grained permeable asphalt layer 62 has good water permeability, thereby ensuring that the permeable asphalt layer 6 realizes smooth penetration of rainwater and maintains the road surface. The water permeability effect prolongs the service life of the pavement.

As shown in Figure 2, the cushion layer 4 can be paved with construction waste and graded gravel, which has good water permeability, high strength and good stability under water-rich geological conditions, and can meet the requirements of foundation bearing capacity. The rubbish layer can play a role in environmental protection and realize waste utilization.

As shown in Figure 2, the base layer 5 is a skeleton structure with a large porosity formed by mixing and paving coarse aggregates of equal particle size with cement, water and modifier without rolling. The porosity reaches 20%-35%. It has good anti-freezing and thawing performance, and does not plasticize when exposed to water.

As shown in FIG. 2 , the purification layer 3 is arranged successively from top to bottom as a ceramsite layer 31 , an activated carbon layer 32 and a medical stone layer 33 . The ceramsite layer 31 has uniform particle size, high strength, and microporous surface, which is not suitable for hardening and has a certain adsorption effect, and has a good physical interception effect on the water flowing through the ceramsite layer 31 . The activated carbon layer 32 has good adsorption capacity for inorganic or organic substances and colloidal particles in the solution, and can further purify the rainwater flowing into the reservoir 2 . The medical stone layer 33 has a strong adsorption capacity and can dissolve minerals. In the process of further purifying the rainwater, the water in the reservoir 2 is rich in minerals, so that the water entering the rainwater reuse pool 22 is suitable for plant irrigation.

As shown in Figure 2, the winter weather is cold, the road surface temperature is low, and it is easy to freeze; the summer weather is hot, the road surface temperature is high, and water is needed to cool down, and the temperature of the lower layer of the road surface is always stable, which can balance the surface temperature of the road surface, but the thermal conductivity of each structural layer of the road surface is poor. . Between the reservoir 2 and the asphalt permeable layer, there are several heat conducting rods 7 arranged vertically. The heat conducting rods 7 are evenly arranged under the road surface. The heat conducting rods 7 are made of metal materials with a high thermal conductivity. The heat transfer between the beds can effectively reduce the temperature of the road surface in summer and slow down the situation that the road surface is easy to freeze in winter. And the heat conducting rods 7 are evenly distributed under the road surface, which improves the pressure resistance of the road surface to a certain extent.

As shown in Figure 2 and Figure 3, there is a cavity through the heat conducting rod 7 along its axial direction, and the cavity is filled with a wick body 71, and the wick body 71 utilizes capillary action to accelerate the speed of the water storage tank 2 when the temperature is high in summer. The accumulated rainwater is transferred to the road surface, and the water on the road surface evaporates, reducing the temperature of the road surface. The heat conducting rod 7 is provided with a plurality of through holes 72 communicating with the cavity along its peripheral wall array, and the wick body 71 can transmit moisture to each structural layer through the through holes 72, further speeding up the transportation of moisture.

As shown in FIG. 2 , the reservoir 2 is made of permeable concrete, so that the reservoir 2 has relatively high strength, can withstand road pressure, and water can penetrate into the reservoir 2 . An anti-reverse seepage layer 11 is laid between the bottom of the reservoir 2 and the road bed 1. The anti-reverse seepage layer 11 effectively prevents the water below the road bed 1 from infiltrating into the reservoir 2, and avoids the turbidity and turbidity of accumulated water in the reservoir 2. The case of many impurities. The anti-reverse seepage layer 11 can be paved with waterproof coiled material.

Working process: The rainwater on the road flows into the reservoir 2 through the permeable asphalt layer 6, the base layer 5, the cushion layer 4 and the purification layer 3 in turn. The water filtered by multiple layers in the reservoir 2 has few impurities and is rich in minerals. The excess water in the pool 2 flows into the rainwater reuse pool 22 through the overflow pipe 21. The rainwater reuse pool 22 is connected with a suction pipe 23 leading to the ground. It is used to irrigate vegetation and drain excess rainwater to the municipal underground pipe network; when the ground is hot and dry in summer, the heat conduction rod 7 accelerates the heat transfer between the surface layer of the road surface and the road bed 1, effectively reducing the temperature of the road surface in summer, and conducts heat The wick body 71 in the cavity of the rod 7 utilizes capillary action to accelerate the transfer of rainwater accumulated in the reservoir 2 to the road surface, so that the water on the road surface evaporates and reduces the road surface temperature.

The above descriptions are only preferred implementations of the present utility model, and the protection scope of the present utility model is not limited to the above-mentioned embodiments, and all technical solutions under the idea of the present utility model all belong to the protection scope of the present utility model. It should be pointed out that for those skilled in the art, some improvements and modifications without departing from the principle of the utility model should also be regarded as the protection scope of the utility model.

Claims (8)

1. a kind of pavement structure in sponge city, including roadbed（1）, roadbed（1）Top is equipped with bed course successively from the bottom to top（4）、 Base（5）With the pervious asphalt layer positioned at road surfaces（6）, it is characterised in that：The roadbed（1）Layer and bed course（4）Between be equipped with store Pond（2）, the cistern（2）Top is equipped with overflow pipe（21）, the cistern（2）Pass through overflow pipe（21）It is connected to rain Recycle pond（22）, the cistern（2）With pervious asphalt layer（6）It is vertical to run through equipped with several heat conductive rods（7）, the heat conductive rod （7）It is uniformly arranged under road surface, the heat conductive rod（7）For the high metal material of thermal coefficient.

2. a kind of pavement structure in sponge city according to claim 1, it is characterised in that：The heat conductive rod（7）Along it Axially through cavity is provided with, sans serif is filled in the cavity（71）.

3. a kind of pavement structure in sponge city according to claim 2, it is characterised in that：The heat conductive rod（7）Along it Peripheral wall array is provided with several through-holes communicated with cavity（72）.

4. a kind of pavement structure in sponge city according to any one of claim 1 to 3, it is characterised in that：It is described Bituminous grout layer（6）It include the particulate pervious asphalt layer positioned at upper layer（61）With the coarse grain pervious asphalt layer positioned at lower layer（62）.

5. a kind of pavement structure in sponge city according to claim 4, it is characterised in that：The cistern（2）With pad Layer（4）Between be equipped with purifying layer（3）.

6. a kind of pavement structure in sponge city according to claim 5, it is characterised in that：The purifying layer（3）From upper It is set gradually under as haydite layer（31）, active carbon layer（32）With medical stone layer（33）.

7. a kind of pavement structure in sponge city according to claim 6, it is characterised in that：The rainwater recycles pond （22）Depth be deeper than the cistern（2）, rainwater recycling pond（22）The interior drinking-water pipe being equipped with towards ground（23）.

8. a kind of pavement structure in sponge city according to claim 7, it is characterised in that：The cistern（2）Bottom With roadbed（1）Between be equipped with counnter attack infiltration layer（11）.