Recessed green land structure

Abstract

The utility model provides a concave greenbelt structure, which comprises a ground layer, a concave groove and a concave groove, the plain soil layer is arranged in the groove; the filtering layer is arranged on the plain soil layer and located in the groove; the organic medium layer is arranged on the filtering layer and is positioned in the groove; the organic fertilizer layer is arranged on the organic medium layer and located in the groove; the overflow well assembly sequentially penetrates through the organic fertilizer layer, the organic medium layer, the filtering layer and the plain soil layer from top to bottom in the first direction and is inserted into the stratum; the vegetation is planted on the organic fertilizer layer and the ground layer; wherein the filter layer is communicated with the overflow well assembly, rainwater filtered by the filter layer flows into the overflow well assembly from the communication position of the filter layer and the overflow well assembly, and impermeable films are laid between the plain soil layer and the filter layer and between the organic medium layer and the side wall of the groove. The seepage-proof film can effectively prevent a large amount of rainwater from losing, and therefore the rainwater recovery rate is increased.

Description

Technical Field

[0001] The utility model relates to the technical field of sponge city equipment, in particular to a sunken green space structure. Background Art

[0002] In order to control urban runoff and deal with the risk of urban waterlogging, a series of sponge city construction technologies have been applied during urban construction. Among them, sunken green space is an important sponge facility for controlling site runoff and rainwater. This facility can regulate runoff, store water, purify water, and retain floodwater.

[0003] At present, rainwater in the aquifer in the sunken green space structure can easily penetrate from the bottom of the aquifer to the bare soil layer, and then penetrate into the stratum from its side wall. Eventually, a large amount of rainwater will penetrate into the underground, resulting in a large amount of rainwater loss, which is not conducive to the collection and reuse of rainwater.

[0004] That is to say, in the prior art, there is a problem that rainwater in the aquifer easily seeps out from the bottom and side walls of the aquifer. Utility Model Content

[0005] The utility model provides a sunken green space structure to solve the above technical problems, thereby solving the problem that rainwater in the aquifer easily seeps out from the bottom and side walls of the aquifer.

[0006] The utility model provides a sunken green space structure, comprising: a stratum, in which a groove is arranged; and

[0007] a plain soil layer disposed in the groove; and

[0008] a filter layer disposed on the plain soil layer and located in the groove; and

[0009] an organic medium layer, which is disposed on the filter layer and located in the groove; and

[0010] an organic fertilizer layer disposed on the organic medium layer and located in the groove; and

[0011] An overflow well assembly, which passes through the organic fertilizer layer, the organic medium layer, the filter layer and the bare soil layer in sequence from top to bottom along a first direction and is inserted into the stratum, wherein the upper end of the overflow well assembly is higher than the upper end of the organic fertilizer layer and lower than the upper end of the stratum, and is used to control the water accumulation height on the upper surface of the organic fertilizer layer; and

[0012] vegetation, which is planted on layers of organic fertilizer and soil;

[0013] Among them, the filter layer is connected with the overflow well assembly, and the rainwater filtered by the filter layer flows into the overflow well assembly from the connection point between the filter layer and the overflow well assembly. Anti-seepage membranes are laid between the soil layer and the filter layer, between the filter layer and the side wall of the groove, and between the organic medium layer and the side wall of the groove to reduce the amount of rainwater seeping into the formation.

[0014] In one embodiment, the impermeable membrane comprises:

[0015] A first horizontal section is laid between the plain soil layer and the filter layer along the second direction, and one end of the first horizontal section extends to the outer peripheral wall of the overflow well assembly; and

[0016] A vertical section, which is laid along a first direction between the filter layer and the side wall of the groove, and between the organic medium layer and the side wall of the groove, and the vertical section is connected to the other end of the first horizontal section;

[0017] The first horizontal section is used to prevent rainwater in the filter layer from seeping into the bare soil layer, and the vertical section is used to prevent rainwater in the filter layer and rainwater in the organic medium layer from seeping into the stratum.

[0018] In one embodiment, the filter layer further comprises:

[0019] a second horizontal section disposed within the formation and above the vertical section; and

[0020] An oblique section, one end of which is connected to the second horizontal section, and the other end of which is connected to the vertical section;

[0021] The oblique section and the vertical section have an included angle β, and the value range of the included angle β is: 115°≤included angle β≤145°.

[0022] In one embodiment, the overflow well assembly includes an overflow well, which passes through an organic fertilizer layer, an organic medium layer, a filter layer and a bare soil layer in sequence from top to bottom along a first direction and is inserted into the formation. The upper end of the overflow well is higher than the upper end of the organic fertilizer layer and lower than the upper end of the formation. A connecting hole is provided on the side wall of the overflow well, and the connecting hole is connected to the filter layer.

[0023] In one embodiment, the overflow well assembly further comprises:

[0024] A twin-turbine rainwater grate disposed at the upper end of the overflow well; and

[0025] The sewage intercepting hanging basket is arranged in the overflow well and connected with the double turbine rainwater grate.

[0026] In one embodiment, the overflow well assembly further includes an overflow rainwater pipe, which is arranged in the overflow well along a third direction, and the overflow rainwater pipe is used to discharge rainwater collected in the overflow well.

[0027] In one embodiment, a concrete well base is further included, which is disposed in the formation and is used to support the overflow well assembly.

[0028] In one embodiment, it further comprises a water guide pipe, the water guide pipe comprising:

[0029] A finished water guide pipe body is disposed in the filter layer; and

[0030] A PVC pipe cap, which is arranged at one end of the finished water guide pipe body away from the overflow well assembly; and

[0031] A PVC tenon joint is arranged on the other end of the finished water guide pipe body close to the overflow well assembly, and the PVC tenon joint is connected to the overflow well assembly;

[0032] Among them, seepage holes are arranged on the PVC card joint, grooves are arranged on the body of the finished water guide pipe, the seepage holes are connected with the grooves, and rainwater in the filter layer is introduced into the seepage holes through the grooves and enters the water guide pipe.

[0033] In one embodiment, the finished water guide pipe body includes multiple connecting pipe sections, and PVC mortise joints are provided between the two adjacent connecting pipes. A PVC pipe cap is provided at one end of the connecting pipe farthest from the overflow well assembly among the multiple connecting pipe sections, and a PVC mortise joint is provided at one end of the connecting pipe closest to the overflow well assembly among the multiple connecting pipe sections.

[0034] In one embodiment, it also includes a plurality of rainwater energy dissipation stone pestles, which are arranged at intervals on the organic fertilizer layer and close to the edge of the overflow well assembly and / or the edge of the organic fertilizer layer. The rainwater energy dissipation stone pestles are used to reduce the flow rate of rainwater on the upper surface of the organic fertilizer layer.

[0035] Compared with the prior art, the utility model has the following beneficial effects: by laying an impermeable membrane between the soil layer and the filter layer, between the filter layer and the side wall of the groove, and between the organic medium layer and the side wall of the groove, it is possible to effectively prevent rainwater in the filter layer and rainwater in the organic medium layer from seeping into the stratum. It is also possible to effectively prevent rainwater in the filter layer from seeping into the soil layer. This prevents a large amount of rainwater from being lost, thereby improving the recovery rate of rainwater. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 This is a schematic diagram of the structural composition of the sunken green space structure in the embodiment of the utility model;

[0037] Figure 2 for Figure 1 Schematic diagram of the three-dimensional structure of the middle guide water pipe;

[0038] Figure 3 for Figure 1 A three-dimensional exploded diagram of the central pilot water pipe;

[0039] Figure 4 for Figure 1 Schematic diagram of the structure of the finished product guide water pipe body;

[0040] Figure 5 for Figure 1 Schematic diagram of the structure of the PVC tenon joint;

[0041] Figure 6 for Figure 5 Top view of the PVC bayonet joint.

[0042] In the figure:

[0043] 1. Sunken green space body; 2. Overflow well; 3. Rainwater energy dissipation stone pestle; 11. Bare soil layer; 12. Anti-seepage membrane; 121. First horizontal section; 122. Vertical section; 123. Second horizontal section; 124. Oblique section; 13. Filter layer; 14. Guide water pipe; 141. Finished guide water pipe body; 1411. Groove; 142. PVC bayonet joint; 1421. Seepage hole; 143. PVC pipe cap; 15. Organic medium layer; 16. Organic fertilizer layer; 17. Stratum; 18. Vegetation; 21. Concrete well seat; 22. Overflow rainwater pipe; 24. Sewage interception basket; 25. Double turbine rainwater grate. DETAILED DESCRIPTION

[0044] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0045] It should be noted that the water storage layer in the present application is the layers arranged above the soil layer 11, specifically including the filter layer 13, the organic medium layer 15 and the organic fertilizer layer 16. The sunken green space body 1 in the present application includes the soil layer 11, the filter layer 13, the organic medium layer 15 and the organic fertilizer layer 16.

[0046] like Figure 1As shown, the utility model provides a sunken green space structure, which includes a stratum 17, a soil layer 11, a filter layer 13, an organic medium layer 15, an organic fertilizer layer 16 and an overflow well assembly. The stratum 17 is provided with a groove therein; the soil layer 11 is provided in the groove; the filter layer 13 is provided on the soil layer 11 and is located in the groove; the organic medium layer 15 is provided on the filter layer 13 and is located in the groove; the organic fertilizer layer 16 is provided on the organic medium layer 15 and is located in the groove; the overflow well assembly passes through the organic fertilizer layer 16, the organic medium layer 15, the filter layer 13 and the soil layer 11 in sequence from top to bottom along a first direction, and is inserted into the stratum 17, and the upper end of the overflow well assembly is higher than the organic fertilizer layer 11. 6, and is lower than the upper end of the stratum 17, which is used to control the water accumulation height on the upper surface of the organic fertilizer layer 16; vegetation 18, which is planted on the organic fertilizer layer 16 and the stratum 17; the filter layer 13 is connected to the overflow well assembly, and the rainwater filtered by the filter layer 13 flows into the overflow well assembly from the connection between the filter layer 13 and the overflow well assembly, and an impermeable membrane 12 is laid between the soil layer 11 and the filter layer 13, between the filter layer 13 and the side wall of the groove, and between the organic medium layer 15 and the side wall of the groove, so as to reduce the amount of rainwater seeping into the stratum 17.

[0047] In the above arrangement, by laying the impermeable membrane 12 between the soil layer 11 and the filter layer 13, between the filter layer 13 and the side wall of the groove, and between the organic medium layer 15 and the side wall of the groove, it is possible to effectively prevent rainwater in the filter layer 13 and rainwater in the organic medium layer 15 from seeping into the stratum 17. It is also possible to effectively prevent rainwater in the filter layer 13 from seeping into the soil layer 11. This prevents a large amount of rainwater from being lost, thereby improving the recovery rate of rainwater.

[0048] Specifically, Figure 1 As shown, in one embodiment, the impermeable membrane 12 includes a first horizontal section 121 and a vertical section 122. The first horizontal section 121 is laid between the soil layer 11 and the filter layer 13 along the second direction, and one end of the first horizontal section 121 extends to the outer peripheral wall of the overflow well assembly; the vertical section 122 is laid between the filter layer 13 and the side wall of the groove, and between the organic medium layer 15 and the side wall of the groove along the first direction, and the vertical section 122 is connected to the other end of the first horizontal section 121; the first horizontal section 121 is used to prevent rainwater in the filter layer 13 from seeping into the soil layer 11, and the vertical section 122 is used to prevent rainwater in the filter layer 13 and rainwater in the organic medium layer 15 from seeping into the stratum 17. Thereby, the recovery rate of rainwater is improved.

[0049] Specifically, Figure 1As shown, in one embodiment, the filter layer 13 further includes a second horizontal section 123 and an oblique section 124. The second horizontal section 123 is disposed in the stratum 17 and is located above the vertical section 122; one end of the oblique section 124 is connected to the second horizontal section 123, and the other end of the oblique section 124 is connected to the vertical section 122; the oblique section 124 and the vertical section 122 have an angle β, and the value range of the angle β is: 115°≤angle β≤145°.

[0050] In the above arrangement, rainwater at the outer edge of the groove can be introduced into the organic medium layer 15 through the second horizontal section 123 and the oblique section 124, and filtered before flowing into the filter layer 13. This prevents rainwater at the outer edge of the groove from directly infiltrating into the stratum 17, thereby improving the rainwater recovery rate of the sunken green space structure.

[0051] Specifically, Figure 1 As shown, in one embodiment, the overflow well assembly includes an overflow well 2, which passes through the organic fertilizer layer 16, the organic medium layer 15, the filter layer 13 and the soil layer 11 in sequence from top to bottom along a first direction, and is inserted into the stratum 17. The upper end of the overflow well 2 is higher than the upper end of the organic fertilizer layer 16 and lower than the upper end of the stratum 17. A connecting hole is provided on the side wall of the overflow well 2, and the connecting hole is connected to the filter layer 13. In this way, when the accumulated water at the upper end of the organic fertilizer layer reaches a preset height, it can be discharged from the overflow well 2, thereby preventing the excessive accumulation of water in the organic fertilizer layer 16 from overflowing from the opening of the groove.

[0052] Specifically, Figure 1 As shown, in one embodiment, the overflow well assembly further includes a twin turbine rainwater grate 25 and a sewage interception basket 24. The twin turbine rainwater grate 25 is arranged at the upper end of the overflow well 2; the sewage interception basket 24 is arranged in the overflow well 2 and connected to the twin turbine rainwater grate 25.

[0053] Specifically, Figure 1 As shown, in one embodiment, the overflow well assembly further includes an overflow rainwater pipe 22, which extends in a third direction (perpendicular to Figure 1 The overflow rainwater pipe 22 is arranged in the overflow well 2 (in the direction of the paper), and is used to discharge the rainwater collected in the overflow well 2.

[0054] Specifically, Figure 1 As shown, in one embodiment, a concrete well base 21 is further included, which is disposed in the formation 17 for supporting the overflow well assembly.

[0055] Specifically, Figure 2 and Figure 3As shown, in one embodiment, it also includes a guide water pipe 14, which includes a finished guide water pipe body 141, a PVC pipe cap 143 and a PVC tenon joint 142. The finished guide water pipe body 141 is arranged in the filter layer 13; the PVC pipe cap 143 is arranged at one end of the finished guide water pipe body 141 away from the overflow well assembly; the PVC tenon joint 142 is arranged at the other end of the finished guide water pipe body 141 close to the overflow well assembly, and the PVC tenon joint 142 is connected to the overflow well assembly.

[0056] Specifically, Figures 4 to 6 As shown, in one embodiment, a seepage hole 1421 is provided on the PVC tenon joint 142, a groove 1411 is provided on the finished water guide pipe body 141, the seepage hole 1421 is connected to the groove 1411, and rainwater in the filter layer 13 is introduced into the seepage hole 1421 through the groove 1411 and enters the water guide pipe 14.

[0057] Specifically, Figure 2 and Figure 3 As shown, in one embodiment, the finished water guide pipe body 141 includes multiple connecting pipe sections, and a PVC bayonet joint 142 is provided between the two adjacent connecting pipes. A PVC pipe cap 143 is provided at one end of the connecting pipe farthest from the overflow well assembly among the multiple connecting pipe sections, and a PVC bayonet joint 142 is provided at one end of the connecting pipe closest to the overflow well assembly among the multiple connecting pipe sections.

[0058] Specifically, Figure 1 As shown, in one embodiment, it also includes a plurality of rainwater energy dissipation stone pestles 3, which are arranged at intervals on the organic fertilizer layer 16 and close to the edge of the overflow well assembly and / or the edge of the organic fertilizer layer 16, and the rainwater energy dissipation stone pestles 3 are used to reduce the flow speed of rainwater on the upper surface of the organic fertilizer layer 16.

[0059] Combine the following Figures 1 to 6 , a more specific embodiment of the present application is described below:

[0060] The present application provides a sunken green space structure with anti-seepage function, including a sunken green space body 1 (including a stratum 17, a soil layer 11, a filter layer 13, an organic medium layer 15 and an organic fertilizer layer 16), an overflow well 2, and a rainwater energy dissipation stone pestle 3.

[0061] Specifically, the overflow well 2 is buried in the sunken green space body 1; the top elevation of the overflow well 2 is 100 mm higher than the finished surface of the sunken green space (the upper end surface of the organic fertilizer layer 16) and 50 mm to 100 mm lower than the surrounding ground (the upper end surface of the stratum 17).

[0062] Specifically, the rainwater energy dissipation stone pestle 3 is placed around the overflow well 2 and the edge of the sunken green space body 1. In this example, the rainwater energy dissipation stone pestle 3 adopts pebbles, which are used to weaken the impact energy of rainwater after confluence.

[0063] Specifically, the sunken green space body 1 comprises, from bottom to top, a bare soil layer 11, an impermeable membrane 12, a filter layer 13 (using a coarse sand filter layer), a water guide pipe 14, an organic medium layer 15 (using a PL organic medium layer), and an organic fertilizer layer 16 (using a PL organic fertilizer layer).

[0064] Specifically, the slope of the sunken green space body 1 is graded at a ratio of 1:3 to connect naturally with the surrounding terrain.

[0065] Specifically, the anti-seepage membrane 12 is in the form of a "two-cloth-one-film" HDPE anti-seepage membrane, that is, two layers of geotextile plus a layer of PE film (polyethylene film). The anti-seepage membrane should overlap and extend to 0.5m outside the boundary of the aquifer.

[0066] In this example, the impervious membrane 12 is a 1.2 mm thick HDPE (full name: HDPE impervious membrane) geomembrane with a weight of 200 g / ㎡, a membrane thickness of not less than 0.75 mm, and a longitudinal and transverse tensile strength of ≥10 KN / m.

[0067] Specifically, the guide water pipe 14 includes a PVC mortise joint 142 , a finished guide water pipe body 141 , and a PVC pipe cap 143 .

[0068] The PVC bayonet joint 142 can directly connect two sections of finished water guide pipe bodies 141 .

[0069] The finished water guide pipe body 141 has grooves 1411 around its periphery. After rainwater enters these grooves, it is guided into the water guide pipe 14 through the PVC tenon joints 142 .

[0070] A PVC pipe cap 143 is installed at the end of the water guide pipe 14 to prevent soil particles from entering.

[0071] Specifically, the overflow well 2 includes a concrete well base 21 , an overflow rainwater pipe 22 , a finished plastic inspection well, a sewage interception hanging basket 24 , and a double-turbine rainwater grate 25 .

[0072] One end of the overflow rainwater pipe 22 is connected to the overflow well, and the other end is connected to the nearest rainwater reservoir of the plot at a slope of 1%.

[0073] Specifically, the guide water pipe 14 is buried in the coarse sand filter layer and slopes toward the overflow well 2 to be connected thereto.

[0074] In the present invention, the terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance; the term "plurality" refers to two or more, unless otherwise clearly defined. The terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "connected" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0075] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by terms such as "up", "down", "left", "right", "front" and "back" are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific orientation, and therefore, cannot be understood as a limitation on the present invention.

[0076] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0077] The above are only preferred implementations of the utility model. The protection scope of the utility model is not limited to the above embodiments. All technical solutions under the idea of ​​the utility model belong to the protection scope of the utility model. It should be pointed out that for ordinary technicians in this technical field, 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

1. A sunken green space structure, characterized in that: include: a stratum having a groove disposed therein; as well as A plain soil layer, which is arranged in the groove; as well as A filter layer, which is disposed on the plain soil layer and located in the groove; as well as an organic medium layer, which is disposed on the filter layer and located in the groove; and an organic fertilizer layer, which is disposed on the organic medium layer and located in the groove; and An overflow well assembly, which passes through the organic fertilizer layer, the organic medium layer, the filter layer and the bare soil layer in sequence from top to bottom along a first direction and is inserted into the stratum, wherein the upper end of the overflow well assembly is higher than the upper end of the organic fertilizer layer and lower than the upper end of the stratum, and is used to control the water accumulation height on the upper surface of the organic fertilizer layer; as well as Vegetation planted on the organic fertilizer layer and the ground layer; Among them, the filter layer is connected with the overflow well assembly, and the rainwater filtered by the filter layer flows into the overflow well assembly from the connection point between the filter layer and the overflow well assembly. An anti-seepage membrane is laid between the soil layer and the filter layer, between the filter layer and the side wall of the groove, and between the organic medium layer and the side wall of the groove, so as to reduce the amount of rainwater seeping into the formation.

2. The sunken green space structure according to claim 1, characterized in that: The anti-seepage membrane comprises: A first horizontal section is laid between the plain soil layer and the filter layer along the second direction, and one end of the first horizontal section extends to the outer peripheral wall of the overflow well assembly; and a vertical section, which is laid along a first direction between the filter layer and the side wall of the groove, and between the organic medium layer and the side wall of the groove, and the vertical section is connected to the other end of the first horizontal section; The first horizontal section is used to prevent rainwater in the filter layer from seeping into the bare soil layer, and the vertical section is used to prevent rainwater in the filter layer and rainwater in the organic medium layer from seeping into the stratum.

3. The sunken green space structure according to claim 2, characterized in that: The filter layer also includes: a second horizontal section disposed within the formation and above the vertical section; and an oblique section, one end of which is connected to the second horizontal section, and the other end of which is connected to the vertical section; The oblique section and the vertical section have an included angle β, and the value range of the included angle β is: 115°≤angle β≤145°.

4. The sunken green space structure according to claim 1, characterized in that: The overflow well assembly comprises an overflow well, a side wall of the overflow well is provided with a communicating hole, and the communicating hole is communicated with the filter layer.

5. The sunken green space structure according to claim 4, characterized in that: The overflow well assembly also includes: a twin-turbine rainwater grate disposed at the upper end of the overflow well; and A sewage interception hanging basket is arranged in the overflow well and connected with the double-turbine rainwater grate.

6. The sunken green space structure according to claim 4 or 5, characterized in that: The overflow well assembly also includes an overflow rainwater pipe, which is arranged in the overflow well along a third direction, and the overflow rainwater pipe is used to discharge rainwater collected in the overflow well.

7. The sunken green space structure according to claim 1, characterized in that: Also included is a concrete well seat, which is disposed in the formation and is used to support the overflow well assembly.

8. The sunken green space structure according to claim 1, characterized in that: Also included is a guide water pipe, the guide water pipe comprising: A finished water guide pipe body, which is arranged in the filter layer; and A PVC pipe cap, which is arranged in the pipe body of the finished water guide pipe at one end away from the overflow well assembly; and A PVC tenon joint, which is arranged on the other end of the finished water guide pipe body close to the overflow well assembly, and the PVC tenon joint is connected to the overflow well assembly; Among them, the PVC card joint is provided with a seepage hole, the finished water guide pipe body is provided with a groove, the seepage hole is connected with the groove, and the rainwater in the filter layer is introduced into the seepage hole through the groove and enters the water guide pipe.

9. The sunken green space structure according to claim 8, characterized in that: The finished water guide pipe body includes multiple sections of connecting pipes, and the PVC mortise joints are arranged between the two adjacent connecting pipes. The end of the connecting pipe farthest from the overflow well assembly among the multiple sections of the connecting pipes is provided with the PVC pipe cap, and the end of the connecting pipe closest to the overflow well assembly among the multiple sections of the connecting pipes is provided with the PVC mortise joint.

10. The sunken green space structure according to claim 1, characterized in that: It also includes a plurality of rainwater energy dissipation stone pestles, which are arranged at intervals on the organic fertilizer layer and close to the edge of the overflow well assembly and / or the edge of the organic fertilizer layer. The rainwater energy dissipation stone pestles are used to reduce the flow speed of rainwater on the upper surface of the organic fertilizer layer.

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