CN105052487B - The structures and methods of sports turf are built using building waste - Google Patents

Abstract

A kind of structures and methods for building sports turf using building waste, it largely replaces natural sandstone using the brickbat of different-grain diameter, gravel-concrete and broken watt in the drainage blanket of sports turf, filter layer and plantation layer, and using blender mix plantation layer layers of material, with the construction method of the layer-by-layer smooth layers of material of land leveller.Invention not only largely consumes building waste and the organic solid waste in city, realizes the recycling and minimizing of municipal solid waste, also adds City Movement type greenery patches, reduces the dosage of natural sandstone, alleviates destruction of the natural sand extraction to ecological environment.Construction method provided by the invention has the advantages that mechanization degree height, high production efficiency, the turf quality of construction are high.

Description

Structure and method of constructing sports field lawn by using construction waste

technical field

The invention belongs to the field of sports field lawn construction, and in particular relates to a structure and method for building a football field or golf field lawn by using construction waste.

technical background

The sectional structure of a football field or golf course lawn is generally divided into vegetation layer, planting layer, filter layer (or transition layer) and drainage layer from top to bottom. Vegetation generally chooses creeping grass species, requiring good weather resistance, trampling resistance, and good coverage. Common choices are Zoysia, reed fescue, and bluegrass. The planting layer should be formulated according to the soil (or substrate) requirements of the selected plants, taking into account both drainage and sports comfort. Natural soil is generally difficult to meet the requirements, and the substrate needs to be artificially prepared. The filter layer generally uses coarse-grained materials or geotextiles to retain fine-grained materials in the planting layer to prevent soil loss; the drainage layer or blind drainage ditch generally uses materials with larger particles and large porosity, such as gravel, pebbles, etc. It plays the role of expelling rainwater that penetrates from the planting layer and the filter layer.

When building a football field or golf course, people usually use natural sand to build drainage layers, filter layers and planting layers, while turning a blind eye to the massive amount of construction waste generated in cities. Now, the state prohibits the use of clay bricks (also known as red bricks) in urban construction, which results in that the clay bricks produced when a large number of old buildings are demolished cannot be recycled as wall materials in urban construction. Construction waste in cities is increasing day by day. The main components of construction waste are broken clay bricks (hereinafter referred to as broken bricks), broken concrete and broken tiles. Only a small amount of them are used for road construction and production of recycled concrete. Most of them have to be transported out of the city and accumulated around the city. The garbage dump takes up a lot of land. Many cities are increasingly unable to deal with the increasing construction waste and domestic waste, and they have fallen into the dilemma of garbage siege. In fact, from the chemical composition and physical properties of bricks, tiles and concrete, they can completely replace natural sand and gravel after being crushed and screened, and can be used as construction materials for sports court lawns. Therefore, the use of construction waste to build sports lawns nearby not only reduces the transportation cost of construction waste, reduces land occupation, but also beautifies the city, reduces natural sand and gravel mining, and reduces the damage to riverbeds and water ecosystems caused by sand and gravel mining. The environmental protection behavior that kills multiple birds with one stone is in line with the concept of circular economy of sustainable development.

The current sports field lawn construction technology generally adopts the method of layering the materials and then using the rotary tiller to cultivate the planting layer. This method has the disadvantage that it is difficult to evenly mix the planting layer, and it is easy to cause the problem of uneven growth of the lawn. In addition, this method also needs to manually use an iron rake to assist the leveling, and the construction efficiency is not high.

In addition, at present, artificial sowing, turf laying, spraying and other methods are usually used for planting lawn plants in sports fields. The artificial seeding and lawn laying methods have the problem of low efficiency, and the spraying method requires special construction equipment.

Solving these problems requires new technical solutions.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a structure and method for building a football field or golf course lawn by using construction waste.

The object of the present invention is achieved in this way:

A sports field lawn is composed of ground foundation, drainage layer, plastic net, filter layer, non-woven fabric, bottom layer, middle layer, surface layer and vegetation layer layer by layer from bottom to top;

in,

The thickness of the drainage layer is 15-30cm, which is a mixture of broken bricks, broken tiles and broken concrete with a particle size of 10-50mm;

The aperture of plastic mesh is 0.9mm;

The thickness of the filter layer is 10-20cm, which is a mixture of broken bricks, broken tiles and broken concrete with a particle size of 1-6mm;

The thickness of the bottom layer is 20-30cm, and the main components are broken bricks, broken tiles and broken concrete;

The thickness of the middle layer is 9-15cm, and the main component is natural sand;

The thickness of the surface layer is 0.8-1.2cm, and the main component is natural sand.

The above-mentioned non-woven fabric can be a high-strength non-woven fabric formed by cross-laying and needle punching of polypropylene rayon fibers.

Drainage dead pipes can be embedded in the above-mentioned drainage layer, and the spacing of the drainage dead pipes is 3-10m.

The above drainage layer can be replaced by blind drainage ditch. The depth of the blind drainage ditch is 10-30cm, the width is 20-40cm, the spacing is 3-8m, and the ditch is filled with any proportion of broken bricks, broken tiles and broken concrete with a particle size of 10-50mm. mixture.

Blind drainage pipes can be embedded in the above-mentioned blind drainage ditch.

The material formula of the above-mentioned bottom layer can be (volume ratio):

in,

The particle size of broken brick, broken tile or broken concrete is: 0.5-5mm;

The organic matter is obtained from distiller's grains, branches, leaves, sawdust or crop stalks after crushing and rotting, and the particle size is less than 8mm;

Nitrogen: Phosphorus: Potassium = 1:2:1 in compound fertilizer;

The material formula of the above-mentioned middle layer can be (volume ratio):

in,

The particle size of natural sand is 0.25-0.35mm;

Nitrogen: Phosphorus: Potassium = 1:2:1 in compound fertilizer;

The material formula of the above surface layer at the time of construction can be (volume ratio):

in,

The particle size of natural sand is 0.25-0.35mm;

Nitrogen: Phosphorus: Potassium = 1:2:1 in compound fertilizer;

The seeds are a mixture of one or several grass seeds.

The construction method of the above-mentioned sports field lawn comprises the following steps:

1) Level the site;

2) Pave a mixture of broken bricks, broken tiles and broken concrete in any proportion according to the particle size and thickness requirements, and roll to form a smooth drainage layer; the drainage layer extends to and communicates with the drainage ditch around the sports field;

3) Lay a plastic mesh on the drainage layer, and then spread a mixture of broken bricks, broken tiles and broken concrete in any proportion according to the particle size and thickness requirements, flatten and compact to form a filter layer; finally, lay a non-woven fabric on the filter layer. ;

4) According to the formula of the bottom layer, middle layer and surface layer of the planting layer, fully mix the materials of each layer, and then lay them layer by layer according to the determined thickness, level and compact;

5) Cover and protect moisture and sprinkle water.

The construction method of the above-mentioned another sports field lawn includes the following steps:

1) Level the site;

2) After excavating the trenches according to the spacing and size requirements, fill the trenches with a mixture of broken bricks, broken tiles and broken concrete in any proportion that meets the requirements of particle size and thickness, and compact them to form blind drainage ditch; extending to and through the drainage ditch around the sports field;

3) Lay a plastic mesh on the blind drainage ditch, and then spread a mixture of broken bricks, broken tiles and broken concrete in any proportion according to the particle size and thickness requirements, smooth and compact to form a filter layer; finally, lay a non-woven fabric on the filter layer. cloth;

4) According to the formula of the bottom layer, middle layer and surface layer of the planting layer, fully mix the materials of each layer, and then lay them layer by layer according to the determined thickness, level and compact;

5) Cover and protect moisture and sprinkle water.

In the construction method of the above-mentioned sports field lawn, a grader is used for leveling work; a drum mixer is used when mixing planting layer materials;

In step 2) of the above-mentioned construction method of a sports field lawn, it also includes burying a drainage blind pipe in a drainage layer or a drainage blind ditch.

Advantages of the present invention:

1) The present invention uses construction waste as the main material to construct the sports field lawn, which not only increases the urban green space, but also realizes the recycling and reduction of urban solid waste, and reduces the damage of solid waste to the environment.

2) The present invention only uses natural sand on the surface layer and middle layer of the planting layer (considering that natural sand has no sharp edges and corners, which is conducive to sports protection), and all other layers use construction waste instead of natural sand and gravel, which greatly reduces the consumption of natural sand and gravel , reducing the damage to the ecological environment caused by natural sand mining.

3) The formula of the planting layer provided by the present invention is suitable for the growth of grasses, and the structure and material ratio of each layer are set, and the permeability is good. When it rains, water will not accumulate on the lawn, and the rainwater that penetrates into the drainage layer can also be very good. It can be quickly discharged from the site, and because of the non-woven filter, there is no soil loss.

4) The planting layer base formulation provided by the present invention uses a large amount of construction waste and urban organic solid waste, which not only realizes the reduction and recycling of urban solid waste, but also is non-toxic and environmentally friendly, and has no harm to the urban environment.

5) The thickness of each layer of the sports field lawn provided by the present invention is set reasonably, the thickness of the surface layer is small, and plant seeds are not wasted; the thickness of the middle layer is moderate, and the natural fine sand without sharp edges and corners is used like the surface layer, which can effectively prevent sports injuries; The use of construction waste not only consumes a large amount of solid waste, but also the thickness and particle size can be set to meet the drainage needs.

6) The present invention provides the possibility for the material production and supply of sports field turf to develop towards commercialization. Using the material formula of each layer provided by the present invention, purchasing a small amount of machinery, such as dump trucks, crushers and mixers, can use urban solid waste to centrally build processing plants on the spot, and produce and sell prepared dry mixing materials; users can purchase these materials. After that, according to the construction instructions, the construction can be carried out very conveniently.

7) The present invention adopts the process of first mixing the base material of the planting layer, and then paving it layer by layer, so that the material composition of each layer is uniform, the sowing is uniform, and the lawn quality is high.

8) The materials used in the present invention are environmentally friendly and have large particles. In the links of transportation and construction, there is little dust pollution and little impact on the urban environment.

9) In the sports field lawn construction process provided by the present invention, the materials used can be obtained locally, mainly solid waste, and the materials are sufficient and cheap; the degree of mechanization is high, the production efficiency is high, and the construction cost is low.

Description of drawings

The present invention will be further described below with reference to the accompanying drawings and embodiments.

FIG. 1 is a schematic vertical cross-sectional view of an embodiment of a sports field lawn.

FIG. 2 is a schematic vertical cross-sectional view of another embodiment of a sports field lawn.

In the figure, 1 - site foundation; 2 - drainage layer; 3 - plastic mesh; 4 - filter layer; 5 - non-woven fabric; 6 - bottom layer; 7 - middle layer; 8 - surface layer; 9 - vegetation layer; 10 - drainage blind pipe; 11-drainage blind ditch.

Detailed ways

As shown in FIG. 1 , a schematic vertical cross-sectional view of each layer structure of an embodiment of a sports field lawn, from bottom to top, sequentially includes a field foundation 1, a drainage layer 2, a plastic mesh 3, a filter layer 4, a non-woven fabric 5, The bottom layer 6, the middle layer 7, the surface layer 8, the vegetation layer 9, and the drainage blind pipe 10 embedded in the drainage layer 2; wherein the bottom layer 6, the middle layer 7 and the surface layer 8 constitute the planting layer.

As shown in FIG. 2 , a schematic diagram of a vertical cross-section of each layer structure of an embodiment of a sports field lawn, from bottom to top, sequentially includes a field foundation 1, a blind drainage ditch 11, a plastic mesh 3, a filter layer 4, and a non-woven fabric 5. , the bottom layer 6, the middle layer 7, the surface layer 8, the vegetation layer 9; the bottom layer 6, the middle layer 7, and the surface layer 8 constitute the planting layer.

The above-mentioned blind drainage pipes are buried every 3-10m.

In some areas with less rainfall, dead drain pipes can be eliminated.

The above-mentioned drainage layer is 15-30 cm thick, and is a mixture of broken bricks, broken tiles and broken concrete with particle diameters of 10-50 mm in any proportion.

The above-mentioned blind drainage ditch has a depth of 10-30cm, a width of 20-40cm, and a spacing of 3-8m. The ditch is filled with a mixture of broken bricks, broken tiles and broken concrete with a particle size of 10-50mm in any proportion.

In areas with high rainfall, blind drainage pipes can be embedded in blind drainage ditches.

The above-mentioned filter layer 4 is 10-20 cm thick, and is a mixture of broken bricks, broken tiles and broken concrete with a particle size of 1-6 mm in any proportion.

The aperture of plastic mesh 3 is 0.9mm, and it can be made of PP, PE or PVC plastic.

The non-woven fabric 5 can be selected from a high-strength non-woven fabric formed by cross-laying and needle punching of polypropylene rayon fibers, and its surface has tiny pores.

The planting layer is divided into bottom layer 6, middle layer 7 and surface layer 8. The thickness of the surface layer is 0.8-1.2cm, and the main cost is natural sand, which contains grass seeds during construction; the thickness of the middle layer is 9-15cm, and the main component is natural sand. The thickness of the bottom layer is 20-30cm, and the main components are broken bricks, broken tiles and broken concrete with a particle size of 0.5-5mm.

Example 1

The structure of each layer of the lawn of a football field in the south is as follows: on the basis of the field, there is a drainage layer with a thickness of 30cm composed of large particles of construction waste with a particle size of 10-50mm, and a drainage blind pipe with an inner diameter of 10cm is embedded at the bottom of the drainage layer; The layer is covered with a plastic mesh with a pore size of 0.9mm; the plastic mesh is a filter layer with a thickness of 20cm composed of coarse-grained construction waste with a particle size of 1-6mm, which is covered with a layer of non-woven fabric; the non-woven fabric has The bottom layer with a thickness of 20cm is composed of construction waste as the main material, on which is a middle layer with a thickness of 9cm and a surface layer with a thickness of 0.8cm; there is a vegetation layer on the surface layer.

The drainage blind pipes are made of plastic blind pipes, which are arranged every 3m and are connected with the drainage ditch around the football field.

The non-woven fabric is a high-strength non-woven fabric formed by cross-laying and needle punching of polypropylene rayon fibers.

Construction waste is broken bricks, broken tiles and broken concrete. The construction waste in the drainage layer and the filter layer is a mixture of broken bricks, broken tiles and broken concrete in any proportion.

The plastic mesh is made of polyethylene plastic (PE) mesh.

The base material formula is:

in,

The compound fertilizer is medium nitrogen: phosphorus: potassium = 1:2:1;

The particle size of broken brick, broken tile or broken concrete is: 0.5-5mm;

The organic matter adopts distiller's grains;

The middle layer material formula is:

in,

The particle size of natural sand is 0.25-0.35mm;

The compound fertilizer is medium nitrogen: phosphorus: potassium = 1:2:1;

Surface Material Recipe (at construction):

in,

The particle size of natural sand is 0.25-0.35mm;

The compound fertilizer is medium nitrogen: phosphorus: potassium = 1:2:1;

The seeds were mixed with Zoysia and Bluegrass, and the weight of Zoysia seeds accounted for 30%.

The construction process of the above football field lawn is as follows:

1) Level the site;

2) Spread construction waste according to the above-determined particle size and thickness, and roll to form a flat drainage layer; bury drainage blind pipes according to the above-determined spacing; the drainage layer and drainage blind pipes extend to the drainage ditch around the football field and connect with it .

3) Lay the selected plastic net on the drainage layer, then spread the construction waste on it according to the above-mentioned determined particle size and thickness, and form a filter layer after leveling and compacting; finally, lay the selected non-woven fabric on the filter layer;

4) According to the determined formula of the bottom layer, middle layer and surface layer of the planting layer, use a drum mixer to fully mix the materials of each layer, and then lay them layer by layer according to the determined thickness and level and compact;

5) Cover and protect moisture and sprinkle water.

In the above construction, a grader is used for the leveling work.

Example 2

The structure of each layer of the lawn of a football field in the north is as follows: on the basis of the field, a blind drainage ditch is arranged every 5m, the blind ditch is 20cm deep and 30cm wide, and the blind ditch is filled with large particles of construction waste with a particle size of 10-50mm; The blind ditch is covered with a layer of plastic mesh with a pore size of 0.9mm; the plastic mesh is a filter layer with a thickness of 15cm composed of coarse-grained construction waste with a particle size of 1-6mm, which is covered with a layer of non-woven fabric; It is a bottom layer with a thickness of 30cm composed of construction waste as the main material, on which is a middle layer with a thickness of 15cm and a surface layer with a thickness of 1.2cm; there is a vegetation layer on the surface layer.

The non-woven fabric is a high-strength non-woven fabric formed by cross-laying and needle punching of polypropylene rayon fibers.

Construction waste is broken bricks, broken tiles and broken concrete. The construction waste in the blind drainage ditch and the filter layer is a mixture of broken bricks, broken tiles and broken concrete in any proportion.

The plastic mesh is made of polypropylene plastic (PP) mesh.

The base material formula is:

in,

The compound fertilizer is medium nitrogen: phosphorus: potassium = 1:2:1;

The particle size of broken brick, broken tile or broken concrete is: 0.5-5mm;

The organic matter is the product obtained after the branches and leaves are crushed and rotted, and the particle size is less than 8mm;

The middle layer material formula is:

in,

The particle size of natural sand is 0.25-0.35mm;

The compound fertilizer is medium nitrogen: phosphorus: potassium = 1:2:1;

Surface material formula (during construction):

in,

The particle size of natural sand is 0.25-0.35mm.

The compound fertilizer is medium nitrogen: phosphorus: potassium = 1:2:1.

The seeds were mixed with reed fescue and bluegrass, and the weight of reed fescue seeds accounted for 40%.

The construction process of the above football field lawn is as follows:

1) Level the site;

2) Excavate the blind drainage ditch according to the determined parameters; then fill the blind drainage ditch with construction waste and compact it according to the determined technical parameters, and the blind drainage ditch extends to the drainage ditch around the football field and connects with it.

3) Lay a plastic mesh on the blind drainage ditch, then spread construction waste on it according to the determined particle size and thickness, level and compact to form a filter layer; finally, lay the selected non-woven fabric on the filter layer;

4) According to the determined formula of the bottom layer, middle layer and surface layer of the planting layer, use a drum mixer to fully mix the materials of each layer, and then lay them layer by layer according to the determined thickness and level and compact;

5) Cover and protect moisture and sprinkle water.

In the above construction, a grader is used for the leveling work.

Example 3

The structure of each layer of the fairway lawn of a golf course in the middle and lower reaches of the Yangtze River is as follows: on the basis of the field, a blind drainage ditch is arranged every 4m, the blind ditch is 30cm deep and 30cm wide, and each blind ditch is arranged with a drainage blind pipe with an inner diameter of 10cm. The blind ditch is filled with large particles of construction waste with a particle size of 10-50mm; then a layer of plastic mesh with a pore size of 0.9mm is covered on the blind ditch; the coarse particle construction waste with a particle size of 1-6mm is laid on the plastic mesh. It consists of a filter layer with a thickness of 15cm, which is covered with a layer of non-woven fabric; the non-woven fabric is a bottom layer with a thickness of 25cm composed of construction waste as the main material, on which is a middle layer with a thickness of 12cm and a thickness of 1cm. Surface layer; there is a vegetation layer on the surface layer.

The non-woven fabric is a high-strength non-woven fabric formed by cross-laying and needle punching of polypropylene rayon fibers.

Construction waste is broken bricks, broken tiles and broken concrete. The construction waste in the blind drainage ditch and the filter layer is a mixture of broken bricks, broken tiles and broken concrete in any proportion.

The plastic mesh is made of polyvinyl chloride (PVC) mesh.

The base material formula is:

in,

The compound fertilizer is medium nitrogen: phosphorus: potassium = 1:2:1;

The particle size of broken brick, broken tile or broken concrete is: 0.5-5mm;

The organic matter is the product of crushed and rotten straw, and the particle size is less than 8mm;

The middle layer material formula is:

in,

The particle size of natural sand is 0.25-0.35mm.

The compound fertilizer is medium nitrogen: phosphorus: potassium = 1:2:1.

Surface material formula (during construction):

in,

The particle size of natural sand is 0.25-0.35mm.

The compound fertilizer is medium nitrogen:phosphorus:potassium=1:2:1.

The seeds are mixed with Zoysia and Bluegrass, and the weight of Zoysia seeds accounts for 30%.

The construction process of the fairway lawn of the above golf course is as follows:

1) Level the site;

2) Excavate the blind drainage ditch according to the determined parameters; after laying construction waste with a thickness of 5 cm at the bottom of the blind ditch, bury a blind drainage pipe, then fill the blind ditch with construction waste and then compact; the blind drainage ditch and the drainage blind pipe It extends to and through the drainage ditch around the football field.

3) Lay a plastic mesh on the blind drainage ditch, then spread construction waste on it according to the selected particle size and thickness, level and compact to form a filter layer; finally, lay the selected non-woven fabric on the filter layer;

4) According to the determined formula of the bottom layer, middle layer and surface layer of the planting layer, fully mix the materials of each layer with a drum mixer, and then lay it layer by layer according to the determined thickness, level and compact;

5) Cover and protect moisture and sprinkle water.

In the above construction, a grader is used for the leveling work.

Claims (8)

1. A sports field lawn, comprising a site foundation (1), a drainage layer (2), a filter layer (4), a planting layer and a vegetation layer (9) composed of a bottom layer (6), a middle layer (7), and a surface layer (8). ), which is characterized in that: from bottom to top, layer by layer are the site foundation (1), the drainage layer (2), the plastic mesh (3), the filter layer (4), the non-woven fabric (5), the bottom layer (6), middle layer (7), surface layer (8) and vegetation layer (9); in, The drainage layer (2) has a thickness of 15-30cm and is a mixture of broken bricks, broken tiles and broken concrete with a particle size of 10-50mm in any proportion; The aperture of the plastic mesh (3) is 0.9mm; The filter layer (4) has a thickness of 10-20 cm, and is a mixture of broken bricks, broken tiles and broken concrete with a particle size of 1-6 mm in any proportion; The thickness of the bottom layer (6) is 20-30cm, and the main components are broken bricks, broken tiles and broken concrete; The thickness of the middle layer (7) is 9-15cm, and the main component is natural sand; The thickness of the surface layer (8) is 0.8-1.2 cm, and the main component is natural sand; The material formula of the described bottom layer (6) is calculated as: Among them, the particle size of broken brick, broken tile or broken concrete is: 0.5-5mm; The organic matter is obtained from distiller's grains, branches, leaves, sawdust or crop stalks after crushing and rotting, and the particle size is less than 8mm; Nitrogen: Phosphorus: Potassium = 1:2:1 in the compound fertilizer; The material formula of the middle layer (7) is calculated as: Among them, the particle size of natural sand is 0.25-0.35mm; nitrogen: phosphorus: potassium = 1: 2: 1 in the compound fertilizer; The material formula of the surface layer (8) at the time of construction is calculated as: Wherein, the particle size of natural sand is 0.25-0.35mm; nitrogen: phosphorus: potassium = 1: 2: 1 in the compound fertilizer; the seeds are a mixture of one or several kinds of grass seeds; The construction method of the sports field lawn comprises the following steps: 1) Level the site; 2) Pave a mixture of broken bricks, broken tiles and broken concrete in any proportion according to the particle size and thickness requirements, and roll to form a smooth drainage layer; the drainage layer extends to the drainage ditch around the sports field and communicates with it; 3) Lay a plastic mesh on the drainage layer, and then spread a mixture of broken bricks, broken tiles and broken concrete in any proportion according to the particle size and thickness requirements, level and compact to form a filter layer; finally, lay a non-woven fabric on the filter layer. ; 4) According to the formula of the bottom layer, middle layer and surface layer of the planting layer, fully mix the materials of each layer, and then lay them layer by layer according to the determined thickness, level and compact; 5) Cover and protect moisture and sprinkle water. 2 . The lawn of a sports field according to claim 1 , wherein the drainage layer ( 2 ) is embedded with drainage dead pipes ( 10 ), and the spacing of the drainage dead pipes ( 10 ) is 3-10 m. 3 . 3 . The lawn of a sports field according to claim 1 , wherein the non-woven fabric ( 5 ) adopts a high-strength non-woven fabric formed by cross-laying and needle punching of polypropylene man-made fibers. 4 . 4. The playground lawn according to claim 1 is characterized in that: a grader is used for leveling work; and a drum mixer is used when mixing planting layer materials. 5. A sports field lawn, comprising a site foundation (1), a blind drainage ditch (11), a filter layer (4), a planting layer and a vegetation layer ( 9), it is characterized in that: layer by layer from bottom to top are site foundation (1), blind drainage ditch (11), plastic mesh (3), filter layer (4), non-woven fabric (5), bottom layer (6) ), middle layer (7), surface layer (8) and vegetation layer (9); in, The blind drainage ditch (11) has a depth of 10-30cm, a width of 20-40cm, and a spacing of 3-8m, and the ditch is filled with a mixture of broken bricks, broken tiles and broken concrete with a particle size of 10-50mm in any proportion; The aperture of the plastic mesh (3) is 0.9mm; The filter layer (4) has a thickness of 10-20 cm, and is a mixture of broken bricks, broken tiles and broken concrete with a particle size of 1-6 mm in any proportion; The thickness of the bottom layer (6) is 20-30cm; the main components are broken bricks, broken tiles and broken concrete; The thickness of the middle layer (7) is 9-15cm, and the main component is natural sand; The thickness of the surface layer (8) is 0.8-1.2 cm, and the main component is natural sand; The material formula of the described bottom layer (6) is calculated as: Among them, the particle size of broken brick, broken tile or broken concrete is: 0.5-5mm; The organic matter is obtained from distiller's grains, branches, leaves, sawdust or crop stalks after crushing and rotting, and the particle size is less than 8mm; Nitrogen: Phosphorus: Potassium = 1:2:1 in compound fertilizer; The material formula of the middle layer (7) is calculated as: Among them, the particle size of natural sand is 0.25-0.35mm; nitrogen: phosphorus: potassium = 1: 2: 1 in the compound fertilizer; The material formula of the surface layer (8) at the time of construction is calculated as: Wherein, the particle size of natural sand is 0.25-0.35mm; nitrogen: phosphorus: potassium = 1: 2: 1 in the compound fertilizer; the seeds are a mixture of one or several kinds of grass seeds; The construction method of the sports field lawn comprises the following steps: 1) Level the site; 2) After excavating the trenches according to the spacing and size requirements, fill the trenches with a mixture of broken bricks, broken tiles and broken concrete in any proportion that meets the requirements of particle size and thickness, and compact them to form blind drainage ditch; extending to and through the drainage ditch around the sports field; 3) Lay a plastic mesh on the blind drainage ditch, and then spread a mixture of broken bricks, broken tiles and broken concrete in any proportion according to the particle size and thickness requirements, smooth and compact to form a filter layer; finally, lay a non-woven fabric on the filter layer. cloth; 4) According to the formula of the bottom layer, middle layer and surface layer of the planting layer, fully mix the materials of each layer, and then lay them layer by layer according to the determined thickness, level and compact; 5) Cover and protect moisture and sprinkle water. 6 . The lawn of a sports field according to claim 5 , wherein the blind drainage ditch ( 11 ) is embedded with a blind drainage pipe ( 10 ). 7 . 7 . A sports field lawn according to claim 5 , wherein the non-woven fabric ( 5 ) adopts a high-strength non-woven fabric formed by cross-laying and needle punching of polypropylene rayon fibers. 8 . 8 . The sports field lawn according to claim 5 , wherein a grader is used for leveling work; and a drum mixer is used when mixing planting layer materials. 9 .