Step two, setting a matrix layer on the reinforced concrete leveling layer;
Step 3, firstly, humus and organic fertilizer are mixed into the substrate layer, then peat or peat in a certain proportion is mixed, and then a certain amount of microporous material is mixed, and finally, a gravel covering layer is paved on the surface;
Step 4, dividing the roof into a planting area and a non-planting area, wherein the planting area is provided with a structural layer, and a plurality of supporting piers are built in the non-planting area;
Step 5, arranging a drainage blind pipe on the reinforced concrete leveling layer and laying a ceramsite drainage layer;
Step six, laying a polyester non-woven fabric filter layer on the ceramsite drainage layer;
Step 7, backfill the polyester non-woven fabric filter layer in the non-planting area, tamp it to the same height as the pier, and then lay the template, reinforced concrete bearing platform, cement mortar bonding layer and paving layer on the tamped soil in turn;
Step 8, filling light planting soil on the polyester non-woven fabric filter layer in the planting area, and planting green plants;
Step 9: Strengthen the wind resistance and toppling resistance of greening objects.
By adopting the technical scheme, the waterproof layer, reinforced concrete leveling layer, matrix layer, masonry support pier, ceramsite drainage layer, drainage blind pipe arrangement, polyester non-woven fabric filter layer laying, filling construction in non-planting area, filling construction in planting area and planting reinforcement construction are sequentially carried out on the roof, and SBS modified asphalt waterproofing membrane is used as waterproof and light ceramsite is used as drainage, thus meeting the waterproof and drainage requirements of roof greening and solving the existing roof greening construction.
The invention further arranges to lay SBS modified asphalt waterproofing membrane with two layers of composite copper tire base as waterproof layer in the first step.
The invention further stipulates that in step 4, the structural layers are vegetation layer, planting soil, filter layer, drainage and water storage layer, root barrier layer, waterproof layer, leveling layer, insulation layer and structural layer from top to bottom.
By adopting the technical scheme, the design is reasonable, the structure is stable and the storage capacity is strong.
The invention also stipulates that the root spacer is a cement mortar leveling layer with a thickness of 20mm 1: 3, a neoprene mixed coil is paved as a waterproof sealing layer, and a gravel layer with a thickness of 30-50mm is paved on the waterproof sealing layer.
By adopting the technical scheme, the design is reasonable, the structure is stable, and the root retaining waterproof effect is good.
The invention further stipulates that the drainage layer adopts gravel, and a drainage plate made of expanded clay, pumice particles or foamed plastic is laid in this layer.
Due to the adoption of the technical scheme, gravel is used as the drainage aquifer, and the gravel has good hydrophobicity, and the drainage board made of expanded clay, pumice particles or foamed plastic is laid, so that the drainage performance is further improved.
The invention further stipulates that in step 4, the supporting pier adopts a rectangular pier made of bricks.
By adopting the technical scheme, the bearing capacity is improved and the stability of the whole structure is enhanced by setting the supporting pier.
The invention is further arranged as follows: step 5, the distance between drainage blind pipes is designed to be 2m, the thickness of ceramsite drainage layer is designed to be 120mm, and the adopted ceramsite diameter is 8- 12mm.
By adopting the technical scheme, the design is reasonable, the structure is stable, and the hydrophobic effect of the ceramsite drainage layer is good.
The invention further stipulates that in step 7, the template thickness is designed as10mm, the reinforced concrete cap thickness is designed as120mm, and the cement mortar bonding layer thickness is designed as 30mm. ..
By adopting the technical scheme, the design is reasonable and convenient,
The invention further provides that, in step 4, a water collecting ditch is arranged at one side of the planting area, and the drainage blind pipe is centrally communicated with the water collecting ditch.
By adopting the technical scheme of the invention, by arranging the water collecting ditch, the poor drainage of the planting area in rainy days can be avoided, so that the root rot phenomenon caused by waterlogging can be avoided, the drying phenomenon of the planting area in dry weather can be effectively improved, and the design is scientific and reasonable.
The invention also proposes that an isolation sliding layer is arranged between the root isolation layer and the waterproof layer, and the isolation sliding layer is made of non-woven materials.
Due to the adoption of the technical scheme, the isolation sliding layer is generally made of non-woven fabrics and other materials, and the isolation sliding layer is arranged to prevent the adhesion between the root barrier layer and the waterproof layer material.
To sum up, the invention has the following beneficial effects:
Firstly, waterproof layer, reinforced concrete leveling layer, base layer, masonry support pier, ceramsite drainage layer, drainage blind pipe, polyester non-woven fabric filter layer, filling construction in non-planting area, filling construction in planting area and planting reinforcement construction are sequentially carried out on the roof, and SBS modified asphalt waterproofing membrane is used as waterproof and light ceramsite is used as drainage, which meets the waterproof and drainage requirements of roof greening and solves the existing top greening construction problem.
Secondly, it has expanded urban greening and played an important social benefit in the deteriorating urban environment. On the one hand, roof greening can beautify the urban environment and improve the naturalness and comfort of the city. On the other hand, in the noisy urban hard landscape, roof greening can increase people's relaxation and relieve the pressure of life, which is a quiet rest place.
Third, planting green plants can purify the air, absorb dust and suppress dust. The polluted air contains a lot of dust and suspended particles, including not only toxic particles such as carbon and lead, but also pathogenic bacteria, and vegetation is a natural filter to absorb air dust. Absorb harmful gases and purify the air. The polluted air contains many toxic gases, such as common nitrogen oxides, sulfur dioxide, carbon monoxide, hydrogen sulfide and hydrogen chloride. Many plants have the special function of absorbing these harmful gases, such as Ailanthus altissima, oleander, crape myrtle, pomegranate, magnolia grandiflora, palm tree, ginkgo biloba, Sabina vulgaris and other plants have strong resistance and absorption ability to sulfur dioxide; Robinia pseudoacacia, Ligustrum lucidum, Platanus acerifolia, Buxus macrophylla and other tree species have strong fluoride resistance; In addition, there are hibiscus, acacia, bauhinia, wisteria, Amorpha fruticosa and so on. Strong resistance to chlorine and hydrogen chloride gas. There is no doubt that roof greening is also a harmful gas purification field;
Fourth, reduce thermal radiation. Vegetation in roof greening can adjust the temperature and humidity of air to a certain extent by transpiration and absorption of heat, and improve the comfort of urban living environment.
Five, sound absorption and sound insulation, the vegetation layer and soil layer in roof greening can effectively absorb and reduce noise. In addition, the vegetation layer can effectively protect the propagation of electromagnetic waves.
expand on
The present invention will be described in detail by examples.
Embodiment: A roof greening construction method sequentially comprises the following steps:
Step 1, laying a waterproof layer on the roof, and pouring a reinforced concrete leveling layer on the waterproof layer for leveling;
Step two, setting a matrix layer on the reinforced concrete leveling layer;
Step 3, firstly, humus and organic fertilizer are mixed into the substrate layer, then peat or peat in a certain proportion is mixed, and then a certain amount of microporous material is mixed, and finally, a gravel covering layer is paved on the surface;
Step 4, dividing the roof into a planting area and a non-planting area, wherein the planting area is provided with a structural layer, and a plurality of supporting piers are built in the non-planting area;
Step 5, arranging a drainage blind pipe on the reinforced concrete leveling layer and laying a ceramsite drainage layer;
Step six, laying a polyester non-woven fabric filter layer on the ceramsite drainage layer;
Step 7, backfill the polyester non-woven fabric filter layer in the non-planting area, tamp it to the same height as the pier, and then lay the template, reinforced concrete bearing platform, cement mortar bonding layer and paving layer on the tamped soil in turn;
Step 8, filling light planting soil on the polyester non-woven fabric filter layer in the planting area, and planting green plants;
Step 9: Strengthen the wind resistance and toppling resistance of greening objects.
The first step is to lay SBS modified asphalt waterproofing membrane with two layers of composite copper tire base as waterproof layer.
Fourthly, a water collecting ditch is arranged at one side of the planting area, and blind drainage pipes are connected to the water collecting ditch in a centralized way.
Among them, the structural layers in step 4 are: vegetation layer, planting soil, filter layer, drainage layer, root isolation layer, waterproof layer, leveling layer, insulation layer and structural layer from top to bottom.
The root isolation layer is a cement mortar leveling layer with a thickness of 20mm 1: 3, and then a layer of neoprene * * * mixed coil is laid as a waterproof sealing layer, and a gravel layer with a thickness of 30-50mm is laid on the waterproof sealing layer.
The drainage aquifer adopts gravel, which is paved with expansive clay, pumice particles or foamed plastic drainage boards.
An isolation sliding layer is arranged between the root isolation layer and the waterproof layer, and the isolation sliding layer is made of non-woven materials.
The supporting pier in the non-planting area is a rectangular brick pier.
Step 5: The distance between blind drainage pipes is 2m, the thickness of ceramsite drainage layer is 120mm, and the diameter of ceramsite used is 8- 12mm.
Step 7, the template thickness is designed as 10mm, the reinforced concrete cap thickness is designed as 120mm, and the cement mortar bonding layer thickness is designed as 30 mm.