CN106677011A - Sidewalk and greenbelt water collecting and storing system - Google Patents

Abstract

The invention provides a rainwater collection and storage system for sidewalks and green areas on both sides. The system includes sidewalks, permeable pipes and green spaces. The sidewalk is a road paved with permeable bricks. The permeable pipes are embedded in the road cushion. Base course, leveling course, brick course. The green space is composed of a planting base, a coarse sand filter layer, and a crushed pebble layer. The planting base is artificial soil, and a non-woven geotextile is arranged between the crushed pebble filter layer and the coarse sand filter layer. The garden wall is built on the upper layer to be higher than the surface layer of the green space. The invention is applicable to the roof of the ground or underground space, and can filter, store and collect water while increasing the area of the green space. The planting substrate of the green space is light and water-retaining, which can effectively filter harmful substances in the rainwater. In the dry and rainy season, the plants do not lack water. In the heavy rainfall season, the rainwater can be filtered layer by layer, collected to the permeable pipe along the slope, and collected to the municipal Water collection pipes to promote water recycling.

Description

Water collection and storage system for sidewalks and green spaces

technical field

The invention belongs to the field of urban construction and design, and specifically provides a water collection and storage system for sidewalks and green areas.

Background technique

my country is a country with drought and water shortage, but it is also the country with the largest water consumption in the world. In recent years, the tension of urban water resources has become increasingly significant, but many cities with sufficient rainfall cannot drain water in time to prevent flooding. In the summer of 2015, Hubei, Jiangsu, Anhui, Jiangxi, Zhejiang, Guizhou, Guangxi and other places were hit by "storms", tens of millions of people in 20 provinces (autonomous regions and municipalities) across the country were affected, a large number of crops were damaged, and the rainstorms and floods directly caused us Tens of billions of dollars of economic losses have been incurred, and the urgency of building a sponge city has become imminent. Sponge city is a new generation of urban stormwater management concept, which means that the city has good "elasticity" in adapting to environmental changes and responding to natural disasters caused by rainwater. When it rains, water absorption, water storage, water seepage, and water purification require When the stored water is "released" and utilized, it can effectively protect the ecological environment and effectively alleviate the contradiction between my country's water shortage and rainy season floods. To build a "sponge city", measures should be taken according to local conditions and in line with its own characteristics. It is an idea to build a sponge city by increasing the construction of green spaces in cities, enhancing the water storage capacity of green spaces and timely drainage. In addition to increasing greening on the ground surface, appropriate greening design can be carried out on the roof of urban shallow underground projects such as commercial and entertainment types.

Contents of the invention

Aiming at the problems existing in the prior art, the present invention aims to provide a water storage system in which the sidewalk is a permeable road, and the green space is designed to store and retain water, which can effectively alleviate the accumulation of heavy rain and heavy rain, and make full use of the green space and sidewalks to collect and discharge rainwater. . The invention is suitable for the roof of the ground or underground space, and can filter, store and collect water while increasing the area of the green space.

The technical solution adopted in the present invention is: a sidewalk and green land collection and storage system, which consists of sidewalks, water permeable pipes, green land and garden walls, water permeable pipes are arranged under the sidewalk, and the green land is distributed on both sides of the sidewalk;

The sidewalk is a permeable sidewalk, the surface of the sidewalk is a permeable brick layer, and the lower part of the permeable brick layer is a permeable leveling layer, a permeable cement stabilized gravel base, and a graded gravel cushion; the graded gravel cushion is laid on the roof or On the ground, and the sidewalk surface is 500-600mm away from the roof or the ground;

The bottom layer of the green land is a crushed pebble filter layer laid on the roof or the ground, and the crushed pebble filter layer is laid with a coarse sand filter layer and a planting base in sequence; the surface of the planting base is higher than the surface of the permeable brick layer, and the height difference is 300 -600mm; At the junction of the sidewalk and the green space, a garden wall is set on the graded gravel cushion to the point where the height difference is 100mm higher, and a garden wall is also set on the edge of the green space from the ground or on the roof. The setting of the garden wall can make The water in the upper part flows downwards, avoiding the lateral flow of water.

The permeable pipe is a plastic blind ditch permeable pipe, which is laid along the sidewalk in the center of the graded gravel cushion, the height of the graded gravel cushion is 200-300mm, the inner diameter of the permeable pipe is 100-140mm, and a permeable pipe is arranged under the permeable pipe pipe socket.

The thickness of the crushed pebble filter layer is 300-400mm, and the particle size is 50mm±5mm; the thickness of the coarse sand filter layer is 200-300mm, and the particle size is 4mm±1mm.

A non-woven geotextile is arranged between the crushed pebble filter layer and the coarse sand filter layer.

The roof or the ground is set so that there is a certain slope from the edge of the area to the center, the center is lower, and the edge of the area is higher, with a slope of 1%-3%, so as to ensure that water gathers to the center and is collected through permeable pipes.

The greenfield crushed pebble filter layer is connected with the graded crushed stone cushion layer.

The height difference between the surface of the garden wall and the surface of the green space is 100mm.

The planting base is a kind of artificial soil, and the compound mass ratio is red loam: vermiculite: perlite: humus soil = 5:1:1:3, and the thickness of the planting substrate should be determined according to the type of vegetation.

Compared with the prior art, the beneficial effects of the present invention are: when the present invention is used on the ground surface or the roof of the underground space, it can increase the area of the green space, and at the same time can filter water, store water and collect water; the planting substrate of the green space is light in water retention and can effectively Filter harmful substances in rainwater. In the dry and rainy season, the plants do not lack water. In the heavy rainfall season, the rainwater can be filtered layer by layer, collected at the permeable pipe along the slope, and collected into the municipal water collection pipe to promote water recycling. When the present invention is used on the ground, it can also make rainwater infiltrate into the ground to replenish the groundwater, and can also collect a part of water through the permeable pipe at the same time, so that the rainstorm and continuous rainfall can quickly infiltrate and drain water, and avoid road accumulation.

The planting matrix layer of the green space is made of vermiculite and perlite with good water storage and water holding capacity, combined with ordinary red loam and humus soil, which can effectively absorb and store filtered rainwater; at the same time, the storage and drainage layer under the shallow green ground can effectively regulate and store Rainwater; the water holding time of 200mm thick planting substrate is 4-5 days, which is 2 times that of typical red soil. The green space purifies the pollutants COD, NH3-N, TN, and TP in the rainwater, and the removal rates are 54.5%-60.3%, 46.3%-69.3%, 48.5%-61.0% and 46.3%-54.0%. It is mainly reflected in the planting matrix layer; the system retains water in drought, stores water in moderate and light rain, and collects and drains water in heavy rainstorms. Water storage and water collection are carried out at the same time or water storage, water seepage and water collection are carried out at the same time. Rainwater infiltrates, stagnates, and Purification and reuse, and the final remaining part of the runoff is collected through the pipe network or discharged through the pumping station, which effectively improves the standard of the urban storage and drainage system, alleviates the pressure of urban waterlogging, and protects the urban ecological environment.

Description of drawings

Below in conjunction with accompanying drawing, sidewalk among the present invention, green land collection and storage system are further described:

Fig. 1 is a plan view of sidewalk and green space water collection and storage system of the present invention;

Fig. 2 is a schematic cross-sectional view of Fig. 1A-A, the runoff condition shown in the figure is the case where the system is located on the roof of the underground space;

Fig. 3 is the structural representation of sidewalk of the present invention;

Fig. 4 is a schematic sectional view of the green field of the present invention;

Figure 5 is a schematic diagram of the rainwater runoff built on the surface of the system, and the structure in the figure is the same as that in Figure 2;

In the figure: 1 is the green space; 2 is the sidewalk; 1-1 is the crushed pebble filter layer; 1-2 is the coarse sand filter layer; 1-3 is the planting substrate; 1-4 is the garden wall; 1-5 is the non-woven geotechnical 2-1 is graded gravel cushion; 2-2 is permeable cement stabilized gravel base; 2-3 is permeable leveling layer; 2-4 is permeable brick layer; 3 is plastic blind ditch permeable pipe; 4 is Permeable pipe socket.

detailed description

In order to further illustrate the present invention, the present invention will be described in detail below in conjunction with the accompanying drawings, but they should not be construed as limiting the protection scope of the present invention.

A water collection and storage system for sidewalks and green spaces, as shown in Figures 1 to 2, is mainly the plane and section of the three components of green space 1, sidewalk 2 and permeable pipe 3, and the section shows the runoff process of rainwater.

A water collection and storage system for sidewalks and green spaces, comprising sidewalks 2, permeable pipes 3, green spaces 1 and garden walls 1-4, water permeable pipes are arranged under the sidewalk 2, and the green spaces 1 are distributed on both sides of the sidewalk 2;

The sidewalk 2 is a permeable sidewalk, the surface of the sidewalk 2 is a permeable brick layer 2-4, and the lower part of the permeable brick layer 2-4 is a permeable leveling layer 2-3, a permeable cement stabilized gravel base 2-2, and a graded gravel pad Layer 2-1; the graded crushed stone cushion layer 2-1 is laid on the roof or the ground, and the surface surface of the sidewalk 2 is 500-600mm away from the roof or the ground; see Figure 3 for the road section of the sidewalk.

Its bottom layer of the said green space 1 is a crushed pebble filter layer 1-1 laid on the roof or the ground, as shown in Figure 4, the crushed pebble filter layer 1-1 is successively laid with a coarse sand filter layer 1-2, planting base 1-1 3. The height difference between the surface of the planting base 1-3 and the surface of the permeable brick layer 2-4 is about 300-600 mm; a garden wall is set on the self-graded gravel cushion 2-1 at the junction of the sidewalk 2 and the green space 1 1-4 is 100mm higher than the height difference, and the edge of the green space 1 is also provided with a garden wall 1-4 from the ground or the top plate, as shown in FIG. 2 .

The permeable pipe is a plastic blind ditch permeable pipe 3, which is laid along the sidewalk 2 in the center of the graded gravel cushion 2-1, the height of the graded gravel cushion 2-1 is 200-300mm, and the inner diameter of the permeable pipe is 100-140mm , the permeable pipe seat 4 is provided under the permeable pipe.

The crushed pebble filter layer 1-1 has a thickness of 300-400mm and a particle size of 50mm±5mm; the coarse sand filter layer 1-2 has a thickness of 200-300mm and a particle size of 4mm±1mm.

A non-woven geotextile 1-5 is arranged between the crushed pebble filter layer 1-1 and the coarse sand filter layer 1-2, as shown in Figure 4

The roof or the ground is set so that there is a certain slope from the edge of the area to the center, and the slope is 1%-3%.

The crushed pebble filter layer 1-1 of the green land 1 is connected with the graded crushed stone cushion layer 2-1.

The height difference between the upper surface of the garden wall 1-4 and the surface of the green space 1 is 100 mm.

The planting base 1-3 is a kind of artificial soil, and the compound mass ratio is red loam: vermiculite: perlite: humus soil = 5:1:1:3, and the thickness of the planting substrate should be determined according to the type of vegetation.

As shown in Figure 2 and Figure 5, it can be seen that the water flow direction of the system when it is applied. The planting substrate of the green space is light and water-retaining, which can effectively filter harmful substances in the rainwater. In the dry and rainy season, the plants are not short of water. , Rainwater can be filtered layer by layer, collected into permeable pipes along the slope, and collected into municipal water collection pipes to promote water recycling. When the present invention is used on the ground, it can also make rainwater infiltrate into the ground to replenish the groundwater, and can also collect a part of water through the permeable pipe at the same time, so that the rainstorm and continuous rainfall can quickly infiltrate and drain water, and avoid road accumulation.

The above description is a preferred embodiment of the present invention. It should be pointed out that for those skilled in the art, some improvements and modifications can also be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as protection scope of the present invention.

Claims (7)

1. footpath, greenery patches harvest water system, it is characterised in that：Its composition includes footpath, water-permeable pipe and greenery patches, people's row Water-permeable pipe is set under road, and the distribution of green areas is in footpath both sides；

The footpath be water permeable sidewalk, footpath top layer be permeable brick layer, permeable brick layer bottom be followed successively by permeable screed-coat, Permeable cement stabilized macadam base, granular cushion；The granular cushion is layed on top board or ground, and footpath Skin surface is apart from top board or ground 500-600mm；

Its bottom of the greenery patches is layed on top board or ground for crushed gravel filtering layer, is equipped with coarse sand filter on crushed gravel filtering layer successively Layer, plantation basic unit；The plantation substrate surface is higher than water-permeable brick layer surface, and the discrepancy in elevation is 300-600mm；In footpath and greenery patches Lap-joint garden wall is provided with from granular cushion to being higher by greenery patches surface；

The water-permeable pipe is plastic blind-ditch water-permeable pipe, and it is layed in granular cushion central authorities, granular cushion along footpath High 200-300mm, permeable bore is 100-140mm, and water-permeable pipe has permeable tube socket.

2. footpath according to right 1, greenery patches harvest water system, it is characterised in that：The crushed gravel thickness of filter bed is 300-400mm, particle diameter 50mm ± 5mm；The coarse sand thickness of filter bed is 200-300mm, and particle diameter is 4mm ± 1mm.

3. footpath according to right 1, greenery patches harvest water system, it is characterised in that：The crushed gravel filtering layer is filtered with coarse sand Non-woven geotextile is provided between layer.

4. footpath according to right 1, greenery patches harvest water system, it is characterised in that：The top board or ground are set to area There is certain slope at domain edge to center, and center is relatively low, and the gradient is 1%-3%.

5. footpath according to right 1, greenery patches harvest water system, it is characterised in that：The crushed gravel filtering layer in the greenery patches with Granular cushion connects.

6. footpath according to right 1, greenery patches harvest water system, it is characterised in that：The garden wall upper surface with it is green The difference in height of ground surface is 100mm.

7. footpath according to right 1, greenery patches harvest water system, it is characterised in that：The plantation basic unit is a kind of artificial Soil, compounding mass ratio is red soil：Vermiculitum：Perlite：Peat=5：1：1：3.