CN204898841U - Rotatory grass planting ditch structure that combines sponge city theory - Google Patents

Abstract

The utility model relates to the technical field of urban drainage, and discloses a rotating grass-planting ditch structure combined with the concept of a sponge city, which includes a rotating grass-planting ditch, a graded soil layer, and a drainage pipe. The utility model designs a rotating grass-planting ditch structure, which can greatly extend the time of rainwater flow, reduce the flow of flood peaks, improve the natural purification of initial rainwater, and solve the problem of traditional grass-planting ditch drainage. Poor capacity and low purification efficiency make Zhicaogou more in line with the concept of sponge city and urban drainage needs.

Description

Rotating grass planting ditch structure combined with the concept of sponge city

technical field

The utility model relates to the technical field of urban drainage, in particular to a rotating grass-planting ditch structure combined with the concept of a sponge city.

Background technique

Recently, there have been frequent reports of waterlogging disasters across the country. The disadvantages of traditional urban drainage methods have gradually emerged. The concept of sponge cities has been vigorously promoted across the country. Various sponge city measures have also been implemented in various regions, but various measures still exist under certain circumstances. Certain disadvantages. For example, the traditional grass planting ditch is mainly for the purpose of transportation, and the amount of runoff reduction is very limited; while the traditional small ecological wetland, especially if it is set up in the community, if the water is not properly stored in the rainy season, it will easily lead to deterioration of water quality, breeding of mosquitoes, and affect the area. environment. Rain gardens are good for landscaping, but have limited ability to reduce runoff.

Contents of the invention

The purpose of the utility model is to provide a rotating grass-planting ditch structure combined with the concept of sponge city, which can realize the natural purification of initial rainwater and reduce the flood peak flow during heavy rain.

For realizing above-mentioned technical purpose, reach above-mentioned technical effect, the present invention realizes through the following technical solutions:

The utility model discloses a structure of a rotating grass-planting ditch combined with the concept of a sponge city: it includes a rotating grass-planting ditch, a graded soil layer and a drainage pipe, the rotating grass-planting ditch is provided with multi-stage rotating steps, and the bottom of the rotating grass-planting ditch is connected with a drainage The graded soil layer covers the top of the steps of the rotary grass planting ditch.

Among them, the multistage rotating steps are arranged in a spiral shape.

Wherein, the step surface of the rotating grass planting ditch is inclined downward, and the inclination angle is 2°-5°.

Wherein, the graded soil layer is also covered with a permeable geotextile, and a permeable geotextile perpendicular to the water flow direction is arranged at every other section.

Wherein, the top layer of the rotary grass planting ditch is provided with a rainwater overflow pipe, the upper end of the rainwater overflow pipe is provided with an overflow port, and the overflow port is flush with the top of the rotary grass planting ditch.

Wherein, a grid net cover is arranged above the drain pipe and the rainwater overflow pipe.

Among them, the underlying surface of the rotary grass planting ditch is the replacement soil layer.

The utility model has the following beneficial effects:

1. The utility model can greatly extend the rainwater flow time and reduce the flood peak flow by setting the grass-planting ditch with multi-stage rotating steps, and in the process of long-distance confluence, part of the catchment water will be digested by infiltration, which can further improve and reduce the flood peak ability.

2. By rotating the vegetation and soil in the grass planting ditch, it can naturally purify the flowing catchment water, especially the initial rainwater containing a large amount of suspended solids and solid particle impurities. A permeable geotextile perpendicular to the water flow direction is arranged at intervals to prevent the graded soil layer from being washed by rainwater and keep the soil structure stable.

3. When the rainfall is particularly heavy and the bottom drainage pipe cannot meet the discharge requirements, the concave grass planting ditch space can be used as a temporary water storage space. When the water level rises to a level close to the ground, it will be drained through the overflow port.

4. Through the reasonable configuration of landscape vegetation, special and well-proportioned micro-topographic landscape effects can be made.

Description of drawings

Fig. 1 is a schematic plan view of Embodiment 1 of the utility model.

Fig. 2 is a schematic cross-sectional view of Embodiment 1 of the utility model.

Fig. 3 is a schematic plan view of Embodiment 2 of the utility model.

Fig. 4 is a schematic plan view of Embodiment 3 of the present utility model.

Explanation of main component symbols:

1: Rotating grass planting ditch, 2: Grid cover, 3: Drainage pipe, 4: Overflow port, 5: Rainwater overflow pipe, 6: Graded soil layer, 7: Filling soil layer, 8: Humidity resistant Dry plants, 9: Permeable geotextiles.

Detailed ways

In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments.

Embodiment one

As shown in Figures 1 and 2, the utility model discloses a rotary grass planting ditch structure combined with the concept of sponge city, including a rotary grass planting ditch 1, a grid net cover 2, a drainage pipe 3, a rainwater overflow pipe 5, and an overflow port 4. Graded soil layer 6, replacement soil layer 7, permeable geotextile 9.

Its structure is as follows:

The rotary grass planting ditch 1 disclosed by the utility model is provided with multi-stage rotating steps, the steps are arranged in a spiral shape and the step face is inclined downward by 2° to 5°, the underlying surface of the rotary grass planting ditch 1 is the replacement soil layer 7, and the rotary grass planting ditch The upper part of 1 is covered with a graded soil layer 6, the graded soil layer 6 is planted with humidity-loving and drought-tolerant plants 8, and the lower layer of the graded soil layer 6 is covered with a permeable geotextile 9, and a permeable geotextile perpendicular to the direction of water flow is arranged at every other section . A drain pipe 3 is connected to the bottom of the rotary grass planting ditch 1, and the top of the drain pipe 3 is covered with a grid cover 2. The top layer of the rotary grass planting ditch 1 is provided with a rainwater overflow pipe 5, and an overflow port 4 is provided above the rainwater overflow pipe 5. And cover the grille cover 2.

It works as follows:

After the rainfall, due to the certain slope formed by the rotary grass planting ditch 1 and the road, the initial rainwater quickly forms surface runoff, and the surface runoff converges in the rotary grass planting ditch 1 . By rotating the spiral confluence of the grass-planting ditch, the rainwater flow time can be greatly extended, thereby reducing the peak flow. The initial rainwater flow rate is reduced during the long-distance confluence process, and part of the catchment water will be digested through infiltration, and the amount carried will be suspended. Impurities and solid particles can be naturally degraded through the graded soil layer 6 and humidity-loving and drought-tolerant plants 8, and those that cannot be degraded will be separated from the rainwater through the grid cover 2 at the bottom of the rotating grass ditch 1, and the rainwater will pass through the drainage pipe 3 into the municipal rainwater pipe network. When the rainfall is particularly large and the bottom drainage pipe 3 cannot meet the discharge requirements, the concave space of the rotary grass planting ditch 1 can be used as a temporary water storage space, and when the water level rises to a position close to the ground, it passes through the overflow port 4 covered with the grid net cover 2 Enter the rainwater overflow pipe 5 and drain away.

Embodiment two

Rotary grass planting ditch 1 layout form can also be adapted to local conditions, and the plane is selected according to the actual shape of the plot. For example, for long strip plots, the rotary grass planting ditch 1 can be set in the form of a long strip, as shown in Figure 3: the rotary grass planting ditch 1 is provided with multi-stage rotating steps, the steps are arranged in a square spiral and the steps are inclined downward by 2° ~5°, a drainpipe 3 is connected to the bottom of the rotary grass planting ditch 1, the top of the drain pipe 3 is covered with a grid cover 2, the top layer of the rotary grass planting ditch is provided with a rainwater overflow pipe 5, and an overflow pipe 5 is provided above the rainwater overflow pipe 5 Port 4, and cover the grille cover 2. The soil under the rotary grass planting ditch is the replacement soil layer 7, the top of the rotary grass planting ditch 1 is covered with a graded soil layer 6, the graded soil layer 6 is planted with humidity-loving and drought-tolerant plants 8, and the bottom of the graded soil layer 6 is covered with a permeable geotextile Cloth 9, and a permeable geotextile perpendicular to the flow direction is set every other section.

Its working principle is the same as that of Embodiment 1.

Embodiment Three

As shown in Figure 4, the structural size of the grass planting ditch 1 of the utility model is increased, and it is made into a rotating concave square to form a micro-topographic concave landscape garden, including a rotating grass planting ditch 1, a graded soil layer 6 and a drainage pipe 3 , the rotary grass planting ditch 1 is provided with large multi-stage rotating steps, the bottom of the rotary grass planting ditch 1 is connected to the drain pipe 3, the top of the drain pipe 3 is covered with a grid cover 2, and the graded soil layer 6 covers the rotary grass planting ditch 1 Moisture-loving and drought-tolerant plants 8 are planted on the graded soil layer 6 above the steps. According to the needs of the square setting, it is enough to add a footpath.

To sum up, the utility model can not only confluence and transmit the surface runoff of the surrounding plots, but also can be set up as a micro-topographic concave landscape garden through a reasonable configuration of the landscape, and can also be used as a temporary small-scale concave wetland during extreme rainstorms to temporarily store water. And when the rainfall is less than the discharge capacity of the bottom drainage pipe, the stored water will be gradually emptied to the municipal rainwater pipe network. The utility model increases the ground confluence time of the rainwater, thereby reducing the flood discharge pressure of the municipal pipe network during the flood peak.

The above is only a preferred embodiment of the utility model, but the scope of protection of the utility model is not limited thereto, and any person familiar with the technical field can easily think of All changes or replacements should fall within the protection scope of the present utility model.

Claims (7)

1. The structure of the rotary grass planting ditch combined with the concept of sponge city is characterized in that: it includes a rotary grass planting ditch, a graded soil layer and a drainage pipe, the rotary grass planting ditch is provided with multi-stage rotating steps, and the rotary grass planting ditch The bottom is connected with a drainage pipe, and the graded soil layer is covered above the steps of the rotary grass planting ditch. 2. The rotating grass planting ditch structure combined with the concept of sponge city according to claim 1, characterized in that: said multi-stage rotating steps are arranged in a spiral shape. 3. The rotating grass planting ditch structure combined with the concept of sponge city according to claim 1 or 2, characterized in that: the step surface of the rotating grass planting ditch is inclined downward, and the inclination angle is 2°-5°. 4. The rotating grass planting ditch structure combined with the concept of sponge city as claimed in claim 3, characterized in that: said graded soil layer is also covered with permeable geotextiles, and a permeable geotextile perpendicular to the direction of water flow is provided at every other section. geotextile. 5. The rotating grass planting ditch structure combined with the concept of sponge city as claimed in claim 3, characterized in that: the top layer of the rotating grass planting ditch is provided with a rainwater overflow pipe, and the upper end of the rainwater overflow pipe is provided with an overflow port , the overflow port is flush with the top of the rotary grass planting ditch. 6. The rotating grass-planting ditch structure combined with the concept of sponge city as claimed in claim 5, characterized in that: above the drainage pipes and rainwater overflow pipes, there are grid net covers. 7. The rotary grass planting ditch structure combined with the concept of sponge city according to claim 1, characterized in that: the underlying surface of the rotary grass planting ditch is a replacement soil layer.