CN210563030U

CN210563030U - Inverted beam green plant roof structure

Info

Publication number: CN210563030U
Application number: CN201920400364.7U
Authority: CN
Inventors: 严岗; 陈文峰; 高洪远; 邓东生; 李彬; 刘�东; 张仁龙; 刘博�
Original assignee: Changjiang Institute of Survey Planning Design and Research Co Ltd
Current assignee: Changjiang Institute of Survey Planning Design and Research Co Ltd
Priority date: 2019-03-27
Filing date: 2019-03-27
Publication date: 2020-05-19
Anticipated expiration: 2029-03-27

Abstract

The utility model provides a reversed beam green plant roof structure, which comprises a sparse soil layer, a polyester geotextile filter layer, a cobble layer, a plastomer modified asphalt waterproof coil layer, a non-tar polyurethane waterproof coating layer, a UEA compensation shrinkage concrete waterproof layer, a light concrete filling layer and a reversed beam structure roof from top to bottom in sequence; the top plate of the inverted beam structure is uniformly provided with a plurality of cross beams distributed in parallel and a plurality of longitudinal beams distributed in parallel, and the cross beams and the longitudinal beams are vertically distributed in a crossed manner to form a grid structure; the light concrete filling layer is arranged inside the grid structure, and the upper surface of the light concrete filling layer is matched with the top surfaces of the cross beams and the longitudinal beams to form a plane structure. The utility model provides a load overweight and deposit the problem of difficult row of water, also solved the problem that heat preservation waterproof and the quality of raising is difficult to guarantee.

Description

Inverted beam green plant roof structure

Technical Field

The invention relates to the technical field of urban greening development, in particular to a reversed beam green plant roof structure.

Background

At present, in some greening squares newly built in China, the structural top plate adopts a reversed beam structure in order to improve the clear height of an underground space, the elevation of the beam surface is 55-70 cm higher than that of the top plate, the beams are crossed vertically and horizontally to form a # -shaped grid, and the side length is about 6-12 meters. The top plate is covered with soil 2-3m thick for landscape greening. Under the condition of meeting the green requirement of planting, alleviate the roof load, improve waterproof quality, accomplish to prevent, arrange, hold, plant and heavily, the adverse effect of adverse beam district check has to be considered again, and how to select suitable green structure way of planting is the key that this engineering became bad. The traditional green plant roof method is that a heat insulation layer is firstly manufactured on a base layer, then leveling is carried out, water proofing is carried out, then storage planting is carried out, the heat insulation layer is generally paved with a heat insulation board or sprayed with a hard foam polyurethane heat insulation material, for the square project, a reverse beam section lattice with the height of 55-70 cm is arranged on the board, the base surface is uneven, the effect of the heat insulation and water proofing layer is difficult to guarantee, accumulated water in the section lattice is difficult to discharge, and the growth and survival of plants are influenced; the thickness of the covering soil is 2-3 meters, the load of the covering soil on the plate reaches 4-6 tons per square meter, the structure is difficult to bear, and the structure is not economical.

Disclosure of Invention

The invention aims to provide a reversed beam green plant roof structure aiming at the defects of the prior art, solves the problems of heavy load and difficult discharge of water storage, and also solves the problems of heat preservation, water resistance and difficult guarantee of the quality of storage and cultivation.

The invention provides a reversed beam green plant roof structure which is characterized by sequentially comprising a sparse soil layer, a polyester geotextile filter layer, a cobble layer, a plastomer modified asphalt waterproof coil layer, a non-tar polyurethane waterproof coating layer, a UEA compensated shrinkage concrete waterproof layer, a light concrete filling layer and a reversed beam structure roof from top to bottom; the top plate of the inverted beam structure is uniformly provided with a plurality of cross beams distributed in parallel and a plurality of longitudinal beams distributed in parallel, and the cross beams and the longitudinal beams are vertically distributed in a crossed manner to form a grid structure; the light concrete filling layer is arranged inside the grid structure in a shape like a Chinese character 'tian', the upper surface of the light concrete filling layer is matched with the top surfaces of the cross beams and the longitudinal beams to form a plane structure, and the UEA compensation shrinkage concrete waterproof layer, the non-tar polyurethane waterproof coating layer, the plastomer modified asphalt waterproof roll material layer, the cobble layer, the polyester geotextile filter layer and the sparse rural soil layer are sequentially paved on the plane structure from bottom to top.

The lightweight concrete filling layer adopts cement as a main cementing material, a certain amount of water and an additive are added and mixed into slurry, then the slurry is mechanically mixed with foam formed by mixing and foaming a foaming agent, water and air, and the foam is poured in situ or is put into a mold to be solidified to form concrete, wherein the thermal conductivity coefficient is required to be less than or equal to 0.180W/(m.k); the foaming ratio of the foaming agent is required to be more than or equal to 25 times; the concrete adopted by the lightweight concrete filling layer is required to have a dry volume density of 750-850 kg/cubic meter; the compressive strength of the lightweight concrete layer is required to be more than or equal to 3.5 MPa, and the water absorption is required to be less than or equal to 20%.

The UEA shrinkage-compensating concrete waterproof layer is a concrete rigid waterproof layer with micro-expansibility and is formed by mixing concrete with a mark C25 and UEA expansion admixture, and the UEA expansion admixture establishes a pre-tension stress in the concrete to prevent shrinkage cracks from being generated in the concrete solidification process; the UEA shrinkage-compensating concrete waterproof layer is used as a leveling layer and a base layer of waterproof paint; the UEA compensation shrinkage concrete waterproof layer is 8 cm thick, and a single-layer bidirectional phi 6@200 reinforcing mesh is arranged for increasing the rigidity of the concrete. How to configure the reinforcing mesh.

The non-tar polyurethane waterproof coating layer adopts a two-component curing reaction type waterproof coating; the non-tar polyurethane waterproof coating layer does not contain coal tar, has small pungent peculiar smell and causes little pollution to the environment; the thickness of the non-tar polyurethane waterproof coating layer is more than or equal to 0.25 cm, the tensile strength is more than or equal to 1.9 MPa, and the tearing strength is more than or equal to 12N/mm.

The plastic body modified asphalt waterproof roll material layer adopts a waterproof roll material containing a composite copper base and a polyester base, contains a chemical root-resisting agent and has good root-prick resistance; the thickness of the plastic modified asphalt waterproof roll layer is more than or equal to 0.4 cm, the content of soluble substances is required to be more than or equal to 3000 g/square meter, the tensile resistance is more than or equal to 800N/50 mm, and the tensile rate is more than or equal to 40%.

The cobble layer adopts naturally formed non-angular gravel with the required particle size of 2-3 cm; the thickness of the cobblestone layer is 8 cm.

The polyester geotextile filter layer is used for isolating the upper soil layer and the lower water filtering layer, preventing soil loss and draining redundant water in the soil layer; the unit mass is required to be not less than 300 g/square meter; the equivalent aperture is 0.007-0.02 cm, and the permeability coefficient is more than or equal to 10-2 cm/s; the polyester geotextile filter layer is made of a material directly prepared by a polyester method through spinning and needling consolidation, has excellent fracture resistance and corrosion resistance, can effectively protect a lower structure, and requires that the fracture strength is more than or equal to 15 kilonewtons per meter and the elongation is 40-60%.

The soil layer of the sparse soil garden is backfilled planting soil, the soil is loose and not hardened, soil blocks are easy to break, the saturation water density is less than or equal to 1100 kilograms per cubic meter, and the permeability coefficient is greater than or equal to 10-4 centimeters per second; the soil layer of the sparse soil garden adopts cultivation soil containing organic matters, the content of the organic matters is more than or equal to 5%, the content of full salt is less than or equal to 0.3%, and the pH value is 6.5-7.5.

The invention can ensure the functional requirements of green plants, and the design follows the principle of 'prevention, discharge, storage and planting' and the balance, including the thickness and nutrients of a soil layer, the isolation effect and the water filtration performance of a filter layer, the selection of a drainage layer and the requirement of puncture resistance. The sparse soil layer of the rural area has the advantages of loose texture, no hardening, easy breaking of soil blocks and the like, contains a certain amount of organic matters, and is suitable for large-area landscaping. The polyester geotextile filter layer can permanently isolate the upper soil layer, prevent soil loss, effectively drain redundant moisture in the soil layer and play a good role in isolation and water filtration. The cobble layer is natural and pollution-free, and has excellent drainage performance and good durability. The modified asphalt waterproof coiled material contains a chemical root-resisting agent and has good root-prick resistance.

The invention effectively ensures the waterproof and heat-insulating effect of the roof, and the good heat-insulating property of the foamed concrete can be used as the heat-insulating layer of the roof, thereby having good effect and low cost. The double-layer waterproof effect is firm, and the safety is ensured; the plastomer modified asphalt waterproof coiled material has unique high temperature resistance, good low temperature flexibility, good water resistance, good elasticity, large elongation and strong capability of adapting to deformation of a base layer. The non-tar polyurethane waterproof coating has excellent extensibility, stable performance, reliable waterproof performance, no coal tar, small pungent odor and less environmental pollution.

The invention can effectively reduce the load of the roof and save the manufacturing cost. In some squares, 2-3m of soil is covered on the roof, the load is large, and the unit weight is 6-10 tons/cubic meter. In order to effectively reduce the dead weight, the sparse garden soil is selected, the foam concrete is selected for the filling layer, the functional requirement is met, the dead weight is reduced by about 20%, the roof saves the manufacturing cost by about 15%, and a good economic effect is achieved.

Drawings

FIG. 1 is a schematic structural view of the present invention;

fig. 2 is a schematic view of the inverted beam structure top plate of the present invention.

The special-purpose plastic cement-based composite material comprises, by weight, 1-a loose rural soil layer, 2-a polyester geotextile filter layer, 3-a cobble layer, 4-a plastic modified asphalt waterproof coil layer, 5-a non-tar polyurethane waterproof coating layer, 6-UEA shrinkage-compensating concrete waterproof layer, 7-a light concrete filling layer, 8-a roof with a reversed beam structure and 9-a beam/longitudinal beam.

Detailed Description

The invention will be further described in detail with reference to the following drawings and specific examples, which are not intended to limit the invention, but are for clear understanding.

As shown in fig. 1, the reversed beam green plant roof structure is characterized by sequentially comprising a sparse soil layer, a polyester geotextile filter layer, a cobble layer, a plastomer modified asphalt waterproof coil layer, a non-tar polyurethane waterproof coating layer, a UEA compensated shrinkage concrete waterproof layer, a light concrete filling layer and a reversed beam structure roof from top to bottom; the top plate of the inverted beam structure is uniformly provided with a plurality of cross beams distributed in parallel and a plurality of longitudinal beams distributed in parallel, and the cross beams and the longitudinal beams are vertically distributed in a crossed manner to form a grid structure; the light concrete filling layer is arranged inside the grid structure in a shape like a Chinese character 'tian', the upper surface of the light concrete filling layer is matched with the top surfaces of the cross beams and the longitudinal beams to form a plane structure, and the UEA compensation shrinkage concrete waterproof layer, the non-tar polyurethane waterproof coating layer, the plastomer modified asphalt waterproof roll material layer, the cobble layer, the polyester geotextile filter layer and the sparse rural soil layer are sequentially paved on the plane structure from bottom to top.

The lightweight concrete filling layer adopts cement as a main cementing material, a certain amount of water and an additive are added and mixed into slurry, then the slurry is mechanically mixed with foam formed by mixing and foaming a foaming agent, water and air, and the foam is poured in situ or is put into a mold to be solidified to form concrete, wherein the thermal conductivity coefficient is required to be less than or equal to 0.180W/(m.k); the foaming agent is an additive which can reduce the surface tension of liquid, generate a large amount of uniform and stable foam and is used for producing foam concrete, the quality of the foaming agent is reliable, the performance of the foaming agent is good, and the foaming times of the foaming agent are required to be more than or equal to 25 times; the concrete adopted by the lightweight concrete filling layer is required to have a dry volume density of 750-850 kg/cubic meter; the compressive strength of the lightweight concrete layer is required to be more than or equal to 3.5 MPa, and the water absorption is required to be less than or equal to 20 percent; the lightweight means that the porosity of the foamed concrete is increased, the dry density is reduced, and the weight is reduced.

The UEA shrinkage-compensating concrete waterproof layer is a concrete rigid waterproof layer with micro-expansibility and is formed by mixing concrete with a mark C25 and UEA expansion admixture, and the UEA expansion admixture establishes a pre-tension stress in the concrete to prevent shrinkage cracks from being generated in the concrete solidification process; the UEA shrinkage-compensating concrete waterproof layer is used as a leveling layer and a base layer of waterproof paint; the UEA compensation shrinkage concrete waterproof layer is 8 cm thick, and a single-layer bidirectional phi 6@200 reinforcing mesh is arranged for increasing the rigidity of the concrete.

Details not described in this specification are within the skill of the art that are well known to those skilled in the art.

Claims

1. A reversed beam green plant roof structure is characterized by sequentially comprising a sparse soil layer, a polyester geotextile filter layer, a cobble layer, a plastomer modified asphalt waterproof coil layer, a non-tar polyurethane waterproof coating layer, a UEA compensated shrinkage concrete waterproof layer, a light concrete filling layer and a reversed beam structure roof from top to bottom; the top plate of the inverted beam structure is uniformly provided with a plurality of cross beams distributed in parallel and a plurality of longitudinal beams distributed in parallel, and the cross beams and the longitudinal beams are vertically distributed in a crossed manner to form a grid structure; the light concrete filling layer is arranged inside the grid structure in a shape like a Chinese character 'tian', the upper surface of the light concrete filling layer is matched with the top surfaces of the cross beams and the longitudinal beams to form a plane structure, and the UEA compensation shrinkage concrete waterproof layer, the non-tar polyurethane waterproof coating layer, the plastomer modified asphalt waterproof roll material layer, the cobble layer, the polyester geotextile filter layer and the sparse rural soil layer are sequentially paved on the plane structure from bottom to top.

2. The inverted beam green roof structure according to claim 1, wherein the UEA compensating shrinkage concrete waterproof layer is 8 cm thick.

3. The reversed beam green plant roof structure according to claim 2, wherein the thickness of the non-tar polyurethane waterproof coating layer is greater than or equal to 0.25 cm.

4. The inverted beam green plant roofing structure of claim 3 wherein the plastomer modified asphalt waterproofing roll layer has a thickness of 0.4 cm or greater.

5. The inverted beam green-plant roofing structure according to claim 4, wherein the cobble layer is made of naturally-formed non-corner gravel having a particle size of 2-3 cm; the thickness of the cobblestone layer is 8 cm.

6. The inverted beam greenery roofing structure according to claim 4, wherein the polyester geotextile filter layer has a mass per unit of not less than 300 grams per square meter; the equivalent aperture is 0.007-0.02 cm, and the permeability coefficient is more than or equal to 10-2 cm/s; the breaking strength of the polyester geotextile filter layer is more than or equal to 15 kilonewtons per meter, and the elongation is 40-60%.

7. The inverted beam green plant roofing structure of claim 4, wherein the sparse mass garden soil layer is backfilled planting soil; the soil layer of the sparse soil garden adopts cultivation soil containing organic matters.