CN210491800U

CN210491800U - Utilize rainwater garden of building waste structure

Info

Publication number: CN210491800U
Application number: CN201920170719.8U
Authority: CN
Inventors: 刘程; 高彦波
Original assignee: Xingjing Ecological Environmental Protection Technology Suzhou Co ltd
Current assignee: Xingjing Ecological Environmental Protection Technology Suzhou Co ltd
Priority date: 2019-01-31
Filing date: 2019-01-31
Publication date: 2020-05-12
Anticipated expiration: 2029-01-31

Abstract

The utility model discloses an utilize rainwater garden of building waste constitution, top-down includes in proper order: the device comprises a filter layer, a planting layer, a first purifying layer, a second purifying layer and a base layer; the material of the filter layer is wood dust, the material of the planting layer is planting soil, the material of the first purifying layer is concrete aggregate, the material of the second purifying layer is steel slag, and the material of the base layer is brick blocks; plants are planted on the planting layer. Through the mode, the utility model utilizes the special physical properties and chemical properties of common construction wastes to process the construction wastes into the filler with a specific particle size range, and the filler is arranged according to a certain level and proportion, so that the construction wastes become efficient water quality purifying filler, and the water purifying capacity of the rainwater garden is improved; common construction wastes are fully utilized, so that the cost is saved, and the concept of environmental protection is met.

Description

Utilize rainwater garden of building waste structure

Technical Field

The invention relates to the technical field of rainwater gardens, in particular to a rainwater garden constructed by utilizing building wastes.

Background

There are now different definitions of rain gardens, and some consider a rain garden as a concave greenery, artificially excavated or naturally formed by later stages, primarily for collecting and absorbing rain from the roof or ground, as an ecologically sustainable rain utilization and flood control facility. Some rainwater gardens are considered to be effective rainwater natural purification and disposal technologies which take natural ecology and beauty as main modes to reduce runoff peak values, reduce environmental pollution and improve water quality, and meanwhile, the rainwater gardens are also a biological retention facility.

Generally speaking, all landscape greenbelt systems depend on scientific and technical or natural means, and rainwater collection, utilization, treatment and the like are taken as purposes, and the system can be defined as a rainwater garden. The rainwater garden is an effective rainwater natural purification and disposal technology, is a development mode of modern landscape architecture simulating rainwater percolation function in nature, and is a dry land ecosystem applying a biological retention principle.

The most of the existing patents on rain gardens focus on the following three directions:

① the rainwater garden facilities can be improved in water storage or purification capacity by adjusting the physical characteristics of the planting medium, such as by adding new medium, or by changing the thickness, shape, and composition of the medium, or by combining microbial communities.

② an irrigation system, a numerical control system, a humidity or temperature sensor, etc. are added on the basis of the traditional rain garden, the technical extension of the rain garden is expanded, and the rain garden facilities are organically combined with other disciplines, for example, the invention patent with patent number ZL201710831400.0 is an ecological rain garden.

③ A rain garden facility is combined with other sponge urban facilities to form a complete rain storage system with runoff reduction, water purification and water resource regulation functions, for example, the invention patent with patent number 201410793993.2 discloses a rain storage system for solving urban waterlogging, haze and heat island effects.

The existing rainwater garden types require a large amount of additional materials, and are high in construction cost and long in construction period.

Disclosure of Invention

The invention mainly solves the technical problem of providing the rainwater garden constructed by utilizing the building wastes, and the common building wastes can be processed into the filler with the specific particle size range, so that the filler becomes the high-efficiency water quality purification filler, and the water purification capacity of the rainwater garden is improved.

In order to achieve the purpose, the technical scheme adopted by the invention for solving the technical problems is as follows:

a rainwater garden constructed by using construction wastes sequentially comprises the following components from top to bottom: the device comprises a filter layer, a planting layer, a first purifying layer, a second purifying layer and a base layer; the filter layer is made of sawdust, the planting layer is made of a mixture of planting soil and humus, the first purifying layer is made of concrete aggregate, the second purifying layer is made of steel slag, and the base layer is made of brick blocks; plants are planted on the planting layer.

Preferably, the rainwater garden further comprises a separation layer, the separation layer is arranged between the planting layer and the first purification layer, and the separation layer is made of geotextile.

Preferably, the depth of the rainwater garden is 100cm ± 20 cm.

Preferably, the thickness of the filter layer is 5cm ± 2cm, the thickness of the planting layer is 35cm ± 2cm, the thickness of the first purification layer is 10cm ± 2cm, the thickness of the second purification layer is 20cm ± 2cm, and the thickness of the base layer is 30cm ± 2 cm.

Preferably, the ratio of the planting soil to the humus in the planting layer is 3: 1.

Preferably, the concrete aggregate in the first purification layer is building waste concrete aggregate; the concrete aggregate in the first purification layer is set to be spherical particles; the particle size of the concrete aggregate in the first purification layer is 5-20 mm.

Preferably, the grain size of the steel slag in the second purifying layer is 10 mm-25 mm.

Preferably, the brick blocks in the foundation layer are building waste brick blocks; the grain diameter of the brick blocks in the basic layer is 50 mm-100 mm.

Preferably, the first foundation layer comprises clay, and the clay is filled in gaps among the brick blocks in the first foundation layer.

Preferably, the rainwater garden further comprises a cushion layer, the cushion layer is paved above the filter layer, the cushion layer is made of broken bricks, and the particle size of the broken bricks is smaller than that of the broken bricks.

Due to the application of the technical scheme, compared with the prior art, the invention has the following beneficial effects:

the rainwater garden constructed by using the construction waste is provided, the common construction waste is processed into the filler with a specific particle size range by using the special physical properties and chemical properties of the common construction waste, and the filler is arranged according to a certain level and proportion, so that the filler becomes the efficient water quality purification filler, and the water purification capacity of the rainwater garden is improved; common construction wastes are fully utilized, so that the cost is saved, and the concept of environmental protection is met.

Drawings

Fig. 1 is a schematic view showing a structure of a rainwater garden constructed using construction waste according to the present invention.

Description of reference numerals:

the device comprises a cushion layer 1, a filter layer 2, a planting layer 3, a separating layer 4, a first purifying layer 5, a second purifying layer 6, a base layer 7 and plants 8.

Detailed Description

The following detailed description of the preferred embodiments of the present invention, taken in conjunction with the accompanying drawings, will make the advantages and features of the invention easier to understand by those skilled in the art, and thus will clearly and clearly define the scope of the invention.

Referring to the attached drawings, the rainwater garden constructed by using the construction waste sequentially comprises from top to bottom: the filter layer 2, plant layer 3, first purification layer 5, second purification layer 6 and basic layer 7. The filter layer 2 is made of wood chips, the planting layer 3 is made of a mixture of planting soil and humus, the first purifying layer 5 is made of concrete aggregate, the second purifying layer 6 is made of steel slag, and the base layer 7 is made of brick blocks; plants 8 are planted on the planting layer 3.

The depth of the rain garden can be set to 100cm ± 20 cm. The thickness of the filter layer 2 is 5cm +/-2 cm, the thickness of the planting layer 3 is 35cm +/-2 cm, the thickness of the first purifying layer 5 is 10cm +/-2 cm, the thickness of the second purifying layer 6 is 20cm +/-2 cm, and the thickness of the base layer 7 is 30cm +/-2 cm.

The fine and broken sawdust in the filter layer 2 is paved on the lower planting layer 3, which mainly plays the roles of preliminary filtering, moisture preservation and environment protection for the growth of microorganisms.

The planting layer 3 is formed by planting soil and humus according to the weight ratio of 3: the 8-layer plant nutrient layer formed by mixing the 1 proportion is the original soil of the rainwater garden field. The migration of humic acid to elements is mainly represented by the surface adsorption and ion exchange adsorption of organic colloid to metal ions, and the integration and complexation of humic acid to elements. The planting layer 3 is dug to be in a designed shape according to the specification of the rainwater garden, and planting soil and humus are filled and tamped. The humus has the characteristics of loose soil, good air permeability, strong water absorption, small temperature change and the like, is beneficial to the growth of the plants 8, and can also reduce the input of fertilizers.

In order to avoid the loss of nutrients in the planting layer 3, the rainwater garden can further comprise a separation layer 4, the separation layer 4 is arranged between the planting layer 3 and the first purification layer 5, and the separation layer 4 is made of geotextile. The geotextile has the functions of water permeation, water seepage and filtration, and can isolate the planting soil in the planting layer 3 and the humus filler on the upper layer of the geotextile.

The first purification layer 5 is made of concrete aggregate of waste buildings, and is processed into spherical particles with the particle size ranging from 5mm to 20 mm. Concrete aggregate refers to a granular loose material that plays a role of a skeleton or filling in concrete. According to the historical record of the water quality of the runoff on site, the slow-release Al and Mg ions can be mixed in the concrete, and the preliminary purification effect is achieved through ion replacement with pollutants in the runoff.

The second purifying layer 6 is made of steel slag with grain size of 10-25 mm, and the steel slag is composed of various oxides formed by oxidizing impurities in pig iron such as silicon, manganese, phosphorus, sulfur and the like in the smelting process and salts generated by the reaction of the oxides and a solvent. The steel slag has certain alkalinity and larger specific surface area, so that TP and other heavy metal pollutants in runoff can be obviously removed.

The brick block with the particle size of 50-100 mm is selected as the overall framework of the rainwater garden device for the foundation layer 7, the brick block is selected from waste red brick blocks, and gaps among the brick blocks are filled with clay to form a stable structure. The first base layer 7 is used for stabilizing the rainwater garden structure and tamping the whole structure for arrangement.

In order to further purify the water quality, the rainwater garden can also comprise a cushion layer 1, wherein the cushion layer 1 is laid above the filter layer 2, and plays a role in filtering, adsorbing, protecting the filter layer 2 and the planting layer 3 and has a unique landscape effect. The cushion layer 1 is made of broken bricks, the broken bricks are waste broken red bricks, the particle size of the broken bricks is smaller than that of the broken bricks, the particle size of the broken bricks can be 10-20 mm, and the broken red bricks have good nitrogen and phosphorus removal functions as water purification fillers.

Digging a ground base according to the size of a preset rainwater garden, arranging waste red brick blocks of about 300mm on the base to stabilize the base, and filling clay into gaps among the bricks. After the substrate is tamped, a second purification layer 6, a first purification layer 5, a separation layer 4, a planting layer 3, a filter layer 2 and a cushion layer 1 are sequentially arranged. The first purification layer 5 needs to be processed into spheres with similar particle sizes, slow-release Al and Mg ions can be mixed in concrete according to the historical record of the water quality of the field runoff, and the ions are exchanged with pollutants in the runoff to play a purification role. After the planting soil and the humus are mixed in proportion, the mixture is covered on the geotextile, the filling layer can not be compacted, the permeability of the filling layer is 500mm/hr, and grass seeds are sowed in the planting soil or landscape plants 8 are planted; a filter layer 2 with the thickness of about 5cm is uniformly covered on the mixture of the planting soil and the humus; fragments of waste red brick blocks with the thickness of about 20mm are paved on the surface of the filter layer 2.

The building waste is selected as the main material of the rainwater garden, and not only because the selected material has permeability and filterability, the steel slag, the concrete aggregate and the red brick blocks selected in the rainwater garden have the characteristics of large specific surface area, strong adsorption capacity, easy attachment of a biological membrane on the surface and the like, and have good permeability and filterability; and various materials with pollutant filtering and adsorbing capacity are used as filling materials in the rainwater garden, so that the rainwater garden is economical and environment-friendly, and the waste is recycled.

The construction waste contains beneficial chemical components, such as steel slag is alkaline, and iron ions have a fixing effect on soluble organic phosphorus in runoff; the concrete particles contain various ions such as Ca, Al and the like, and are easy to react with metal ions and phosphate in runoff, so that pollutants are converted into flocculent precipitates from a dissolved state.

The rainwater garden enclosed by the red brick head blocks can prevent water and soil loss caused by rainwater erosion, weaken water flow impulsive force, and the formed rainwater garden is stable in structure and durable in use.

The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. A rainwater garden constructed by using construction waste is characterized by comprising the following components in sequence from top to bottom: the device comprises a filter layer, a planting layer, a first purifying layer, a second purifying layer and a base layer; the filter layer is made of wood chips, the planting layer is made of planting soil, the first purifying layer is made of concrete aggregate, the second purifying layer is made of steel slag, and the base layer is made of brick blocks; plants are planted on the planting layer.

2. A rainwater garden constructed using construction waste, according to claim 1, wherein: the rainwater garden further comprises a separation layer, the separation layer is arranged between the planting layer and the first purification layer, and the separation layer is made of geotextile.

3. A rainwater garden constructed using construction waste, according to claim 1, wherein: the depth of the rainwater garden is 100cm +/-20 cm.

4. A rainwater garden constructed using construction waste, according to claim 1, wherein: the thickness of filter layer is 5cm 2cm, the thickness of planting the layer is 35cm 2cm, the thickness of first purification layer is 10cm 2cm, the thickness that the second purified the layer is 20cm 2cm, the thickness of basic unit is 30cm 2 cm.

5. A rainwater garden constructed using construction waste, according to claim 1, wherein: the concrete aggregate in the first purification layer is building waste concrete aggregate; the concrete aggregate in the first purification layer is set to be spherical particles; the particle size of the concrete aggregate in the first purification layer is 5-20 mm.

6. A rainwater garden constructed using construction waste, according to claim 1, wherein: the grain size of the steel slag in the second purifying layer is 10 mm-25 mm.

7. A rainwater garden constructed using construction waste, according to claim 1, wherein: the brick blocks in the foundation layer are building waste brick blocks; the grain diameter of the brick blocks in the basic layer is 50 mm-100 mm.

8. A rainwater garden constructed using construction waste, according to claim 7, wherein: the foundation layer comprises clay, and the clay is filled in gaps among the brick blocks in the foundation layer.

9. A rainwater garden constructed using construction waste, according to claim 1, wherein: the rainwater garden also comprises a cushion layer, wherein the cushion layer is paved above the filter layer, the cushion layer is made of broken bricks, and the particle size of the broken bricks is smaller than that of the broken bricks.