CN114753464A

CN114753464A - Rainwater garden

Info

Publication number: CN114753464A
Application number: CN202210276204.2A
Authority: CN
Inventors: 黄伍龙; 杨新谋; 周坚; 冯爱武; 王树伟
Original assignee: Hangzhou Bluesky Landscape Construction Co ltd
Current assignee: Hangzhou Bluesky Landscape Construction Co ltd
Priority date: 2022-03-21
Filing date: 2022-03-21
Publication date: 2022-07-15
Anticipated expiration: 2042-03-21
Also published as: CN114753464B

Abstract

The invention discloses a rainwater garden which comprises a foundation pit generated by sinking the surface of foundation soil downwards, wherein a planting soil layer, a packing layer and a gravel layer are sequentially paved in the foundation pit from top to bottom; the foundation soil forms a dam body at the edge of the foundation pit for intercepting surface water from entering the foundation pit; the foundation soil is provided with a drainage groove at the outer side of the dam body, and a drainage pipe connected to the gravel layer is arranged at the bottom of the drainage groove; a lifting drainage frame is inserted in the drainage groove and comprises an outer side plate with a filter screen, a top plate and an inner side plate; the inner wall of the drainage groove is inwards sunken to form a groove, and a filter plate and a movable drainage plate are arranged at the notch of the groove; when the drain frame is raised and the inner panel passes over the rebates of the channels, the drainage plate may be extended into the drainage channel, drawing surface water into the channels and out of the filter panels. The invention has the advantages of effectively dealing with surface water with larger silt content and improving the drainage capacity.

Description

Rainwater garden

Technical Field

The invention relates to a rainwater garden which is mainly applied to the technical field of rainwater flood control in sponge cities.

Background

The rainwater garden is a naturally formed or artificially excavated shallow-recessed green land, and is used for gathering and absorbing rainwater from a roof or the ground, purifying the rainwater through the combined action of plants and sand, gradually infiltrating the rainwater into soil, conserving underground water, or supplementing urban water such as landscape water and toilet water. Is an ecologically sustainable rain flood control and rain water utilization facility. The main functions of the device are that the peak flow is reduced through stagnation, the rainwater discharge is reduced, downstream pipelines, structures and water bodies are protected, the rainwater is purified by utilizing plant interception and soil infiltration, the pollution is reduced, the runoff rainfall is fully utilized to contain underground water, the treated rainwater can be collected and utilized, the shortage of water resources is relieved, the environment of a residential area can be improved through reasonable design and proper maintenance, food and habitat are provided for birds, butterflies and other animals, the diversity of biological species is improved, the humidity and the temperature of air in the environment can be adjusted through the transpiration effect of plants in a garden, and the microclimate environment is improved.

For example, patent application with prior art publication No. CN213358898U discloses a rainwater garden for sponge city construction, which comprises a road and a reservoir, wherein the top of the road is provided with a garden, a gravel layer, a planting soil layer, an adsorption layer, a filter layer and a support layer are sequentially arranged in the garden from top to bottom, the support layer is fixedly arranged at the top of the reservoir, support piles a are symmetrically arranged at the top of the reservoir, the top ends of the support piles a sequentially penetrate through the support layer and the filter layer and are fixedly arranged on the bottom surface of the adsorption layer, limit pipes are symmetrically arranged on the bottom surface of the inner side of the reservoir, the bottom ends of the two limit pipes all penetrate through and extend to the outer side of the bottom surface of the reservoir, and are fixedly connected with drain pipes. A water drainage groove is formed between the road and the garden, water inlets are symmetrically formed in the outer wall of the garden, the number of the water inlets is multiple, and filter screens are symmetrically arranged on the inner wall of one side, opposite to the water inlets, of the water inlets.

Although the rainwater garden of this application passes through water drainage tank and filter screen, can realize the filtering action to rainwater, surface water to a certain extent, nevertheless meetting rainfall, under the great condition of rainfall intensity, surface water can make its silt content higher to the erodeing of basic soil, and the filter effect of filter screen this moment just seems not enough, and silt deposits easily in water drainage tank in addition, causes the jam of water drainage tank certain degree, has weakened the ability that rainwater garden prevents waterlogging.

Disclosure of Invention

The invention aims to provide a rainwater garden which can effectively deal with surface water with larger silt content and improve drainage capacity.

The invention is realized by the following technical scheme.

A rainwater garden comprises a foundation pit which is generated by sinking the surface of foundation soil downwards, wherein a planting soil layer, a packing layer and a gravel layer are sequentially paved in the foundation pit from top to bottom; the foundation soil forms a dam body at the edge of the foundation pit for intercepting surface water from entering the foundation pit; the foundation soil is provided with a drainage groove at the outer side of the dam body, and a drainage pipe connected to the gravel layer is arranged at the bottom of the drainage groove; a lifting drainage frame is inserted in the drainage groove and comprises an outer side plate with a filter screen, a top plate and an inner side plate; the inner wall of the drainage groove is inwards sunken to form a groove, and a filter plate and a movable drainage plate are arranged at the notch of the groove; when the drain frame is raised and the inner panel passes over the rebates of the channels, the drainage plate may be extended into the drainage channel, drawing surface water into the channels and out of the filter panels.

As a further improvement of the invention, the filter plate is vertically arranged, the bottom side edge of the filter plate is connected to the lower edge of the notch of the groove, and a gap is reserved between the top side edge of the filter plate and the upper edge of the notch of the groove; the drainage plate is rotatably connected to the top side of the filter plate, and an elastic reset piece is arranged at the rotary connection position; the drainage frame is characterized in that the drainage plate and the filter plate are mutually folded when the inner side plate of the drainage frame seals the notch of the groove, and the elastic reset piece can drive the drainage plate to rotate and extend into the drainage groove when the drainage frame is lifted and the inner side plate crosses the notch of the groove.

As a further improvement of the invention, the bottom side edge of the filter plate is detachably connected at the lower edge of the notch of the groove.

As a further improvement of the invention, when the drainage plate and the filter plate are folded with each other, the drainage plate seals the notch of the groove.

As a further improvement of the invention, an abutting structure is arranged on the inner surface of the outer side plate; when the drainage plate is driven to rotate and stretches into the drainage groove by the elastic resetting piece, the side edge of the drainage plate in the drainage groove can be supported to the bottom of the abutting structure.

As a further improvement of the invention, the bottom of the abutting structure is in snap fit with the side plate of the drainage plate in the drainage groove.

As a further improvement of the invention, when the side edge of the drainage plate in the drainage groove abuts against the bottom of the abutting structure, the side edge is higher than the side edge of the drainage plate in the groove.

As a further improvement of the invention, a silt deposit pit is formed on the lower groove wall of the groove and is lower than the lower edge of the notch of the groove.

As a further improvement of the invention, the upper part of the outer side plate is a solid plate, and the filtering screen is arranged below the solid plate; when the drainage frame is lifted and the drainage plate is stretched into the drainage groove, the filtering screen part of the outer side plate is exposed out of the notch of the drainage groove.

As a further improvement of the invention, one end of the drain pipe, which is connected with the bottom of the drain tank, is provided with a filter screen.

The invention has the beneficial effects that:

the drainage frame can be inserted into the drainage groove to filter surface water under normal conditions, the surface water can be introduced into the groove by the drainage plate extending into the drainage groove when the drainage frame is lifted, and then the surface water is discharged by the filter plate, so that secondary filtration is realized to reduce the content of silt, and the silt can be deposited in the groove to reduce the deposition of the silt in the drainage groove.

Drawings

The preferred embodiments of the present invention will hereinafter be described in detail to assist in understanding the objects and advantages of the invention, by way of the accompanying drawings, in which:

FIG. 1 is a schematic view showing the structure of a rainwater garden according to the present embodiment;

FIG. 2 is a schematic view of the structure of the present embodiment in which the drain frame is inserted into the drain groove;

fig. 3 is a schematic diagram of the drainage frame of the present embodiment in an upward state.

Detailed Description

The invention is explained in more detail below with reference to the drawings and exemplary embodiments.

The terms of orientation of up, down, left, right, front, back, top, bottom, and the like as referred to or as may be referred to in this specification are defined with respect to the configuration shown in the drawings, and the terms "inner" and "outer" refer to directions toward and away from the geometric center of a particular component and are relative terms, and thus may be changed accordingly depending on the position and the state of use of the particular component. Therefore, these and other directional terms should not be construed as limiting terms.

Referring to fig. 1-3, the rainwater garden comprises a foundation pit 12 formed by sinking the surface of foundation soil 11 downwards, wherein a planting soil layer 21, a filler layer 22 and a gravel layer 23 are sequentially paved in the foundation pit 12 from top to bottom. The rainwater garden requires rainwater to infiltrate and purify within a short period of time, and the rainwater is infiltrated within hours generally, so that the soil structure is stronger than that of a common garden, and a more complex soil structure is required compared with the common garden. Although different from the soil layer of a common garden, the planting soil layer 21 also needs to be subjected to loosening fertilization periodically, and in addition, due to the functionality of the rainwater garden and the specificity of self-sufficiency in the later period, the plants planted in the planting soil layer 21 need to have certain stress resistance, also need to have developed root systems and strong growth, and can withstand long-term drought and short-term waterlogging. The main function of the packing layer 22 and the gravel layer 23 is to penetrate rainwater downwards, and an additional sand layer can be laid between the packing layer 22 and the gravel layer 23, so that the water penetration gradient of the rainwater garden can be further optimized. Perforated pipes are usually embedded in the gravel layer 23, and rainwater penetrating into the gravel layer 23 enters the perforated pipes, and the perforated pipes are in the same direction as the reservoir.

The foundation soil 11 forms a dam body 13 at the edge of the foundation pit 12, the edge high end of the foundation pit 12 is higher than the surface of the foundation soil 11 through the arranged dam body 13, so that surface water can be intercepted and enters the foundation pit 12, the foundation soil is very important when the rainfall is large, and the waterlogging prevention effect on plants in the foundation pit 12 can be achieved. In addition, under special weather conditions and environmental conditions, when the silt content in the surface water is high, the dam body 13 can also be retained outside the foundation pit 12.

The foundation soil 11 is provided with a drainage channel 14 on the outer side of the dam body 13, the bottom of the drainage channel 14 is provided with a drainage pipe 5 connected to the gravel layer 23, and the drainage channel 14 can drain surface water in rainy seasons to the gravel layer 23 and then to a reservoir through a perforated pipe. The end of the drain pipe 5 connected to the bottom of the drain tank 14 is provided with a filter screen f3, which can play a role in filtering.

The drainage frame 3 is inserted in the drainage groove 14, the drainage frame 3 can be lifted, the drainage frame 3 is flush with the foundation soil 11 under the general condition, and the drainage frame 3 can be lifted only under the special condition to play a special function.

The drainage frame 3 is a strip shape as a whole, and includes an outer plate 31, a top plate 33, and an inner plate 32, which are integrated. The outer side plate 31 is attached to the outer groove wall 141 of the drainage groove 14, the inner side plate 32 is attached to the inner groove wall 142 of the drainage groove 14, and the top plate 33 seals the opening of the drainage groove 14 and is flush with the surface of the foundation soil 11. All establish on outer panel 31, roof 33, the interior plate 32 and have filter screen f1, filter screen f1 is woven by the stainless steel wire and is formed, has better abrasion strength for filter graininess debris such as stone grain when the drainage, in order to avoid the infiltration water drainage tank 14. Wherein the top plate 33 is substantially covered by the associated filter screen f 1.

When the rainfall is less or the silt content of the surface water is less, the drainage frame 3 is normally inserted into the drainage groove 14, and the conventional requirement can be met by filtering through the filtering screen f1 of the top plate 33. However, when the rainfall and the rainfall intensity are large, the bottom surface washed by the rain water will carry a lot of silt with the surface water, if only the filtering screen f1 on the top plate 33 is used for filtering, many silt will infiltrate into the drainage channel 14, and the silt will not only easily cause the blockage of the drainage pipe 5, but also will be deposited in the drainage channel 14.

Based on above technical problem, the inner wall of the water drainage groove 14 is inwards sunken to form a groove 15, and the notch of the groove 15 is provided with a filter plate f2 and a movable drainage plate 4. When the drain frame 3 is raised and the inner panel 32 passes over the mouth of the channel 15, the flow-directing plate 4 can extend into the drain channel 14, drawing surface water into the channel 15 and out of the filter panel f 2.

Firstly, the surface water outside the foundation pit 12 will enter the drainage channel 14 after being filtered by the filter screen f1 on the outer side plate 31, the surface water flushed by the dam 13 will enter the drainage channel 14 after being filtered by the filter screen f1 on the inner side plate 32, and the filter screen f1 on the outer side plate 31 and the inner side plate 32 enlarges the filter area of the drainage channel 14 at the notch position, thereby improving the filtering effect.

Secondly, the surface water entering the drainage groove 14 does not directly flow into the drainage pipe 5, but is firstly introduced into the groove 15 by the drainage plate 4 and then returns into the drainage groove 14 through the filter plate f2 in the groove 15, so that the length of the flow path of the surface water can be prolonged, silt in the surface water is in more sufficient contact with the groove wall and the groove bottom of the groove 15, and the silt is easier to be deposited in the groove 15 rather than the drainage groove 14.

Furthermore, compared with the prior art that the surface water is filtered only by the filtering screen f1 of the top plate 33, when the drainage frame 3 is lifted, the surface water firstly passes through the filtering screen f1 on the outer plate 31 and the inner plate 32, is firstly filtered in a strengthening way, and then is filtered for the second time by the filtering screen f2, so that the silt content of the surface water flowing into the drainage tank 14 and the drainage pipe 5 is greatly reduced, and the blockage of the drainage pipe 5 and the silt accumulation of the drainage tank 14 are avoided. In addition, most silt is deposited in the ditch 15 after the secondary filtration, and the silt in the water drainage tank 14 is less, so normally (the drainage frame 3 is inserted in the water drainage tank 14) can not influence the drainage, and only the silt in the ditch 15 needs to be cleaned regularly.

The filter plate f2 and the flow guide plate 4 will be described in more detail below.

The filter plate f2 is vertically arranged, the bottom side of the filter plate f2 is connected to the lower edge of the notch of the groove 15, a gap is reserved between the top side of the filter plate f2 and the upper edge of the notch of the groove 15, the drainage plate 4 is rotatably connected to the top side of the filter plate f2, an elastic reset piece 41 is arranged at the rotating connection position, the drainage plate 4 and the filter plate f2 are mutually folded when the notch of the groove 15 is sealed by the inner side plate 32 of the drainage frame 3, and the drainage plate 4 is clamped by the filter plate f2 and the inner side plate 32 of the drainage frame 3 and cannot move. When the drainage frame 3 is lifted upwards and the bottom side of the inner side plate 32 passes the notch of the groove 15, the drainage plate 4 is not clamped by the inner side plate 32 and the filter plate f2, the drainage plate 4 rotates around the top side of the filter plate f2 and extends into the drainage groove 14 under the driving action of the elastic resetting piece 41, and the surface water flowing from the outer side plate 31 and the inner side plate 32 can flow into the groove 15 through the drainage plate 4. The top side of filter f2 can set up the pivot, and the drainage plate 4 cup joints in the pivot, elasticity resets 41 excellent and can use the epaxial torsional spring of cover in pivot, can reduce occupation space.

The bottom side of the filter panel f2 is removably attached to the bottom edge of the slot 15 to allow for easier cleaning of the slot 15. Specifically, a slot may be formed at the lower edge of the notch of the trench 15, the bottom side of the filter plate f2 is inserted into the slot, the drain frame 3 is moved out when cleaning is needed, the filter plate f2 is pulled out, and a cleaning tool is used to clean silt deposited in the trench 15.

The grooves 15 are used as an emergency and are not normally used, so that the flow guide plate 4 seals the notches of the grooves 15 when the flow guide plate 4 and the filter plate f2 are folded over each other in order to prevent surface water from flowing into the grooves 15 along the inner side plates 32.

In order to ensure that the drainage groove 14 can be closed when the drainage plate 4 extends into the drainage groove 14, an abutting structure 311 is arranged on the inner surface of the outer side plate 31, and when the drainage plate 4 is driven by the elastic resetting piece 41 to rotate and extend into the drainage groove 14, the side edge of the drainage plate 4 in the drainage groove 14 can abut against the bottom of the abutting structure 311. In addition, it is required that elasticity resets 41 can order about the pivoted range of drainage plate 4, works as when the side of drainage plate 4 supports in butt structure 311 bottom, elasticity resets 41 and still needs the residual force ability to order about drainage plate 4 and continue to rotate, makes no gap production between drainage plate 4 and the butt structure 311.

For further improving the sealing performance between the drainage plate 4 and the abutting structure 311, the bottom of the abutting structure 311 and the side plate of the drainage plate 4 in the drainage groove 14 are in snap fit, and a pair of protrusions and grooves capable of being in snap fit can be arranged on the bottom surface of the abutting structure 311 and the side edge of the drainage plate 4.

In addition, in view of further optimizing the guiding function of the drainage plate 4 for guiding the surface water to flow into the groove 15, when the side of the drainage plate 4 in the drainage groove 14 abuts against the bottom of the abutting structure 311, the side is higher than the side of the drainage plate 4 in the groove 15, so that the drainage plate 4 is in an inclined state, and the flow rate of the surface water flowing into the groove 15 can be increased.

For the groove 15, a sediment deposition pit 151 is formed on the lower groove wall of the groove, and the sediment deposition pit 151 is lower than the lower edge of the notch of the groove 15, so that sediment can be more easily deposited in the sediment deposition pit 151, the blockage of the filter plate f2 is reduced, and the circulation speed of surface water is improved.

In addition, although the dam 13 is provided at the edge of the foundation pit 12 to block the surface water from being flushed into the foundation pit 12 in the present application, the water level of the surface water outside the foundation pit 12 is increased when the rainfall is large, and the risk of flushing the dam 13 is increased accordingly. Therefore, the upper part of the outer plate 31 is a solid plate 312, the filtering screen f1 is arranged below the solid plate 312, and when the drainage frame 3 is lifted and the drainage plate 4 is stretched into the drainage channel 14, the filtering screen f1 of the outer plate 31 is partially exposed out of the notch of the drainage channel 14. The surface water flowing from the outside of the drainage channel 14 to the dam 13 is blocked by the solid plate 312 on the upper portion of the outer plate 31, and acts as a water level restriction, and the filtering screen f1 of the outer plate 31 partially exposes the opening of the drainage channel 14, and does not affect the drainage function of the drainage channel 14.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that: the technical solutions described in the foregoing embodiments can be modified, or some technical features can be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A rainwater garden comprises a foundation pit which is generated by sinking the surface of foundation soil downwards, wherein a planting soil layer, a packing layer and a gravel layer are sequentially paved in the foundation pit from top to bottom; the foundation soil is characterized in that a dam body is formed at the edge of the foundation pit by the foundation soil and is used for intercepting surface water from entering the foundation pit; the foundation soil is provided with a drainage groove at the outer side of the dam body, and a drainage pipe connected to the gravel layer is arranged at the bottom of the drainage groove; a lifting drainage frame is inserted in the drainage groove and comprises an outer side plate with a filter screen, a top plate and an inner side plate; the inner wall of the drainage groove is inwards sunken to form a groove, and a filter plate and a movable drainage plate are arranged at the notch of the groove; when the drain frame is raised and the inner panel passes over the rebates of the channels, the drainage plate may be extended into the drainage channel, drawing surface water into the channels and out of the filter panels.

2. A rainfed garden as claimed in claim 1, wherein the filter panels are vertically disposed with their bottom side edges connected to the lower edges of the rebates of the grooves and with gaps between their top side edges and the upper edges of the rebates of the grooves; the drainage plate is rotatably connected to the top side of the filter plate, and an elastic reset piece is arranged at the rotary connection position; when the inner side plate of the drainage frame seals the notches of the grooves, the drainage plate and the filter plate are mutually folded, and when the drainage frame is lifted and the inner side plate crosses the notches of the grooves, the elastic reset piece can drive the drainage plate to rotate and extend into the drainage groove.

3. A rainfed garden as claimed in claim 2, wherein the underside edge of the filter panel is removably attached to the trough at the lower edge of the channel.

4. A rainfed garden as claimed in claim 2, wherein the drainage plate seals the rebates of the grooves when the drainage plate and filter plate are folded over one another.

5. A rainfed garden as claimed in claim 4, wherein the outer side plate has an abutment formation on an inner surface thereof; when the drainage plate is driven to rotate by the elastic resetting piece and extends into the drainage groove, the side edge of the drainage plate, which is positioned in the drainage groove, can be abutted against the bottom of the abutting structure.

6. A rainfed garden as claimed in claim 5, wherein the base of the abutment formation and the side plate of the drainage plate within the drainage channel snap fit.

7. A rainfed garden according to claim 5, wherein the side of the drainage plate within the drainage channel that lies above the side of the drainage plate within the trough when it rests against the base of the abutment structure.

8. A stormwater garden as claimed in claim 2, wherein the lower trough wall of the trough is formed with an silt deposit pit which is lower than the rebate lower edge of the trough.

9. A rainfed garden as claimed in claim 1, wherein the upper part of the outer side plate is a solid plate below which the filter screen is located; when the drainage frame is lifted and the drainage plate is stretched into the drainage groove, the filter screen part of the outer side plate is exposed out of the notch of the drainage groove.

10. A rainfed garden as claimed in claim 1, wherein the end of the drain pipe connected to the base of the gutter is provided with a filter screen.