CN111677197A

CN111677197A - Planted roof and construction method thereof

Info

Publication number: CN111677197A
Application number: CN202010391842.XA
Authority: CN
Inventors: 陆烜; 周兴耀; 曾劲松; 农站; 徐治年; 林磊
Original assignee: Guangxi Construction Engineering Group Construction Engineering General Contracting Co ltd
Current assignee: Guangxi Construction Engineering Group Construction Engineering General Contracting Co ltd
Priority date: 2020-05-11
Filing date: 2020-05-11
Publication date: 2020-09-18

Abstract

The invention discloses a planting roof and a construction method thereof, the planting roof comprises a roof layer, a drainage ditch, a water falling port and a roof outlet pipeline are arranged on the roof layer, a retaining wall is arranged at the drainage ditch, a waterproof layer, a protective layer, a drainage layer, a filter layer, a planting soil layer and a vegetation greening layer are sequentially arranged on the roof layer from bottom to top, the waterproof layer adopts waterproof coiled materials, the drainage layer adopts a fulcrum type plastic drainage plate with convex points, the filter layer adopts non-woven geotextile, and a barrier is arranged between the drainage layer and the filter layer. The planted roof adopts the water filtering and draining system formed by combining the plastic draining plate with the non-woven geotextile, can better meet the requirements of a planted roof structure, and has the advantage of good draining effect compared with the traditional dredging and draining system formed by pebbles and PVC flower pipes. The construction method is simple, and the roof waterproof effect is good.

Description

Planted roof and construction method thereof

Technical Field

The invention relates to the field of buildings, in particular to a planted roof and a construction method thereof.

Background

The planted roof not only has good heat insulation in summer, heat preservation in winter and good thermal stability, but also has good effects of reducing urban heat island effect, purifying air and beautifying living environment. With the increasing greening requirements of people on living environments and the increasing shortage of urban greening land, the planted roof is used as a green energy-saving technology and is more and more widely applied to roof energy-saving design or landscape brightening engineering. The traditional planting roof forms a drainage system by pebbles and PVC flower pipes, and the drainage effect is poor.

Disclosure of Invention

The invention aims to provide a planting roof with good drainage effect and a construction method thereof aiming at the defects in the prior art.

In order to achieve the purpose, the invention adopts the following technical scheme:

on one hand, the invention provides a planting roof, which comprises a roof layer, wherein a drainage ditch, a water falling port and a roof outlet pipeline are arranged on the roof layer, a retaining wall is arranged at the drainage ditch, a waterproof layer, a protective layer, a drainage layer, a filter layer, a planting soil layer and a vegetation greening layer are sequentially arranged on the roof layer from bottom to top, the waterproof layer is made of waterproof coiled materials, the drainage layer is made of a fulcrum type plastic drainage plate with salient points, the filter layer is made of non-woven geotextile, and a barrier is arranged between the drainage layer and the filter layer.

Preferably, the plastic drainage plates are connected by buckling or hot melting.

Preferably, when the plastic drainage plates are buckled, at least two rows or two columns of convex points are overlapped and buckled, and the buckling contact surface is provided with glue.

Preferably, a retaining wall is arranged around the roof layer drainage ditch, a cover plate is arranged between the upper end of the retaining wall and the parapet wall, a drainage hole is formed in the root of the retaining wall, the end part of the plastic drainage plate is tightly attached to the drainage hole of the retaining wall, a concrete layer is arranged between the planting soil layer and the retaining wall, and the end part of the non-woven geotextile is upturned to the retaining wall and is positioned between the retaining wall and the concrete layer.

Preferably, the water outlet of the roof layer is provided with an outer water discharge pipe, an inner water discharge pipe is coaxially sleeved in the outer water discharge pipe, the pipe diameter of the inner water discharge pipe is smaller than that of the outer water discharge pipe, the top of the inner water discharge pipe is provided with a protective cover capable of discharging water, the waterproof layer extends to the position of the pipe outlet of the outer water discharge pipe from the roof layer, the end part of the protective layer is tightly attached to the outer wall of the inner water discharge pipe, the water discharge layer is fixedly connected with the pipe orifice of the inner water discharge pipe, a caulking seal ring is arranged between the water discharge layer and the inner water discharge pipe.

Preferably, a sealing layer is arranged on the pipe wall of the roofing outlet pipeline, a buffering slope is arranged above the joint of the roofing outlet pipeline and the roof layer in a surrounding mode, the waterproof layer, the protective layer, the drainage layer and the filtering layer are all turned upwards along the buffering slope, and a blank pressing abutment is arranged between the roofing outlet pipeline and the planting soil layer.

On the other hand, the invention also provides a construction method for planting the roof, which comprises the following steps:

1) constructing a roof, a slope finding layer and a leveling layer: building a roof layer, completing pouring of a retaining wall of a drainage ditch, pouring a buffer slope after smearing a sealing material on the outer wall of a roof pipeline, then constructing a slope finding layer and a leveling layer, before constructing the slope finding layer, firstly beating cement mortar ash cake thickness control points on the roof layer, setting the intervals of the control points according to 2m-3m, controlling the height by adopting a level gauge and a wire pulling mode, pouring to form the slope finding layer, and constructing the leveling layer on the upper edge of the slope finding layer after finishing the construction of the slope finding layer;

2) and (3) waterproof layer construction: diluting a chloroprene rubber adhesive with industrial gasoline, uniformly stirring, uniformly brushing the chloroprene rubber adhesive on the surface of a leveling layer, then starting to lay and stick a waterproof coiled material, placing the coiled material when laying and sticking, heating the joint of a base layer and the coiled material by using a flame spray gun, rolling and spreading the coiled material forwards and sticking when the material surface of the coiled material is molten, heating the lap joint of the coiled material by using the spray gun after finishing laying and sticking, bonding the lap joint of the coiled material when hot-melt modified asphalt overflows from the lap joint of the coiled material, and tightly filling the end of the lap joint with a sealing paste;

3) construction of a protective layer: arranging a felt or non-woven fabric isolating layer on the waterproof layer, and laying a protective layer;

4) and (3) construction of a drainage layer: the convex points of the plastic drainage plates are upward, the plastic drainage plates are laid from the lowest drainage position to the high position and are an upper layer and a lower layer, the lap joint of the adjacent plastic drainage plates adopts two modes of hot melt connection and buckling bonding lap joint, when the hot melt connection is overlapped, welding equipment is adopted to carry out hot melt welding on the welding belts at the periphery of the plastic drainage plates, and the lap joint width is not less than 160 mm; when the plastic drainage plate is cut to cause that the cut side can not adopt welding lap joint, a lock joint bonding lap joint mode is adopted, an upper plate presses a lower plate during lock joint lap joint, at least two rows or two rows of salient points are overlapped and locked, after special bonding glue is coated on the contact surface of two plate surfaces, the two plate surfaces are knocked to be tightly attached, and a heavy object is used for stacking and pressing; after the pipeline port of the internal drainage pipe and the plastic drainage plate are drilled, nailed and fixed, caulking and sealing are carried out by adopting a sealing material;

5) construction of a filter layer: before the non-woven geotextile is laid, a barrier is arranged between a plastic drainage plate and the non-woven geotextile, then the non-woven geotextile is laid, when the non-woven geotextile is laid, the non-woven geotextile is firstly rolled open, four corners of the non-woven geotextile are straightened and leveled, then the non-woven geotextile is flattened and straightened in sections, a weight is adopted for temporary pressing once the non-woven geotextile is laid, after 10-15m is laid forwards, the non-woven geotextile is covered with soil, after the polymer material barrier with the width not less than 160mm is laid in the position close to the edge of the retaining wall, the non-woven geotextile on the barrier is turned over to the retaining wall, then a concrete layer is constructed, a stainless steel filter screen is arranged at a water falling port, meanwhile, a pier is constructed at a position of a roofing pipeline, and a polyurethane edge sealing is adopted between the roofing;

6) laying a planting soil layer: when the thickness of the covering soil is less than 500mm, after the first layer of covering soil is manually piled up and covered to the thickness of 200-300mm, a template is laid above the first layer of covering soil to form a transportation channel, and a hopper truck is adopted to transport the soil to be pushed to the designed thickness of the covering soil layer by layer; when the thickness of the covering soil is more than or equal to 500mm, manually spreading layer by layer, wherein the thickness of each layer is 250mm, manually spreading the covering soil to 500mm, then rolling the covering soil by a rolling machine, and then performing layered rolling by mechanical operation according to the thickness of each 30 cm;

7) and (3) vegetation planting: and planting vegetation on the planting soil layer.

Preferably, in the step 3), when the slope of the roof is greater than 20 °, the plastic drainage layer and the protective layer are fixedly bonded by using an adhesive.

Compared with the prior art, the invention has the advantages that: the planted roof adopts the water filtering and draining system formed by combining the plastic draining plate with the non-woven geotextile, can better meet the requirements of the planted roof structure, and has the advantages of simple construction and good draining effect compared with the traditional dredging and draining system formed by pebbles and PVC flower pipes. The construction method is simple, and the roof waterproof effect is good.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments or the related art will be briefly introduced below, and it is obvious that the drawings in the following description only relate to some embodiments of the present invention and do not limit the present invention.

Fig. 1 is a schematic structural diagram of a planted roof.

FIG. 2 is a schematic view of the retaining wall structure of a roof gutter.

Fig. 3 is a schematic view of a header structure at a roof drain.

Fig. 4 is a schematic view of the roof outlet pipe header structure.

Drawing edge labels: 1. a roof layer; 2. a waterproof layer; 3. a protective layer; 4. a drainage layer; 5. a filter layer; 6. Planting a soil layer; 7. a vegetation greening layer; 8. a retaining wall; 9. a cover plate; 10. a drain hole; 11. a concrete layer; 12. an outer drainage pipe; 13. an inner drain pipe; 14. a protective cover; 15. a seal ring; 16. a fence; 17. A pipeline is taken out of the roof; 18. a sealing layer; 19. buffering the slope; 20. and pressing the side abutments.

Detailed Description

In order that the above objects, features and advantages of the present invention can be more clearly understood, there will now be described in detail, with reference to the accompanying drawings, a non-limiting detailed description of the present invention.

As shown in fig. 1, the planted roof of the embodiment includes a roof layer 1, a waterproof layer 2, a protective layer 3, a drainage layer 4, a filter layer 5, a planted soil layer 6 and a vegetation greening layer 7, which are arranged in sequence from bottom to top.

As shown in fig. 2 to 4, the roof layer 1 includes a roof, and a slope layer and a leveling layer disposed on the roof, and a drainage ditch, a water falling port, and a roof outlet pipe 17 are disposed on the roof layer. A retaining wall 8 is arranged around the roof drainage ditch, a cover plate 9 is arranged between the upper end of the retaining wall 8 and the parapet wall, and a drainage hole 10 is formed in the root of the retaining wall 8. An outer drainage pipe 12 is arranged at a water falling port of the roof, an inner drainage pipe 13 is coaxially sleeved in the outer drainage pipe 12, the pipe diameter of the inner drainage pipe 13 is smaller than that of the outer drainage pipe 12, and a protective cover 14 capable of draining water is arranged at the top of the inner drainage pipe 13. And a sealing layer 18 is arranged on the pipe wall of the roofing outlet pipeline 17, and a buffering slope 19 is arranged above the joint of the roofing outlet pipeline 17 and the roof layer 1 in a surrounding manner.

The waterproof layer 2 adopts a high polymer modified asphalt waterproof coiled material which has the advantages of convenient construction and easy quality control. As shown in fig. 3, the waterproof layer 2 extends from the roof layer 1 to the pipe orifice of the outer drainage pipe 12 at the roof water falling port. As shown in fig. 4, the waterproof layer 2 is laid on the roof pipeline 17 to the top of the buffer slope 19.

The protective layer 3 is made of fine stone concrete with the strength grade not less than C20 and the thickness not less than 40mm, and is provided with a steel bar mesh sheet with the two directions phi 5@ 200. The protective layer 3 serves to prevent plant roots from puncturing. As shown in fig. 3, at the roof water falling port, the end part of the protective layer 3 is tightly attached to the outer wall of the inner drain pipe 13. As shown in fig. 4, the protective layer 3 extends to the top of the buffer slope 19 at the position of the roofing pipeline 17.

The drainage layer 4 is a fulcrum type plastic drainage plate made of polyethylene and provided with salient points, and the specification is 20m multiplied by 2.1m multiplied by 1.0mm multiplied by 2 cm. The plastic drainage plate is lapped by adopting two modes of hot melt connection lapping and buckling bonding lapping, when in hot melt connection lapping, welding equipment is adopted to carry out hot melt welding on a welding belt at the periphery of the plastic drainage plate, and the lapping width is not less than 160 mm; when the plastic drainage plate needs to be cut and used to cause that the cutting side can not adopt welding lap joint, a lock joint bonding lap joint mode is adopted, the upper plate presses the lower plate during the lock joint lap joint, at least two rows or two rows of conical bosses are overlapped and locked, after special bonding glue is coated on the contact surface of two plastic plates, a special rubber hammer is adopted to knock the plastic plates to enable the plastic plates to be tightly attached, and the plastic plates are piled and pressed by a heavy object for 8-10 minutes. The plastic drainage plate adopts a hot melting welding or buckling bonding lap joint mode, and strengthens the detailed structure treatment, so that the plastic drainage plate has good water-resisting and waterproof performances on the premise of meeting the drainage function. The plastic drainage plate material has good anti-puncturing performance, and the protective layer 3 is combined, so that the planted roof has strong root-puncturing resistance. As shown in FIG. 2, at the drain, the plastic drainage plate ends abut against the drainage holes 10 of the retaining wall 8 to facilitate drainage. As shown in fig. 3, at the roof drain, a plastic drainage plate is connected with the inner drainage pipe 13 by drilling and nailing, and a caulking sealing ring 15 is arranged between the plastic drainage plate and the inner drainage pipe 13. As shown in fig. 4, the drainage layer 4 is paved on the roof pipeline 17 to the top of the buffer slope 19.

The filter layer 5 adopts non-woven geotextile with the specification of 300g/m². A barrier is arranged between the drainage layer 4 and the filter layer 5, so that the non-woven geotextile is prevented from collapsing by planting soil, and the stability of water filtration and drainage is improved. As shown in fig. 2, at the retaining wall 8 around the roofing drain, the ends of the non-woven geotextile are turned up to the retaining wall 8. As shown in fig. 3, at the roof drain, a filter layer 5 is arranged above the drainage layer 4 and the protective cover 14, and a fence 16 enclosing the drain is arranged above the filter layer 5. As shown in figure 4, the filter layer 5 is paved on the roof pipeline 17 to the top of the buffer slope 19.

The planting soil layer 6 can be selected from garden soil, improved soil or inorganic composite planting soil, the type and quality of soil must meet the standard and design requirements, the content of organic substances in the soil must not exceed 5%, the particle size is not more than 16mm, and the water content must meet the compaction requirement. A concrete layer 11 is arranged between the filter layer 5 and the planting soil layer 6 on the retaining wall 8. And a blank pressing abutment 20 is arranged between the roofing outlet pipeline 17 and the planting soil layer 6.

The vegetation greening layer 7 is formed by plants planted in the planting soil layer 6, and the plants of the layer should be selected from ornamental plants such as flowers, grasses, vines, small trees and the like which have strong adaptability, drought resistance, barren resistance and light preference.

The construction method for the planted roof comprises the following steps:

1) constructing a roof, a slope finding layer and a leveling layer: and building a roof layer, building the roof layer, completing the pouring of the retaining wall of the drainage ditch, and pouring the buffer slope after smearing the sealing material on the outer wall of the roofing pipeline. And then constructing a slope finding layer and a leveling layer. When the construction of the slope layer is carried out, the slope layer is reasonably arranged according to the shape of the roof, when the width of the roof is smaller, a single slope form can be arranged, when the width of the roof is larger, slopes can be arranged from the middle of the roof to two sides or from two sides to the middle, the slope is preferably 1% -3%, and the slope of 2% is generally adopted. Before the construction of the slope layer, cement mortar ash cake thickness control points are punched on the roof base layer, the intervals of the control points are set according to 2m-3m, and the height of the control points is controlled by adopting a level gauge and a wire pulling mode. When the slope layer is found and poured, the slope layer is compacted by vibration, and the slope layer is scraped, paved and leveled by adopting a 3m scraping rule according to a control point. And after the construction of the slope finding layer is finished, constructing a leveling layer on the upper edge of the slope finding layer, firmly bonding the leveling layer and the slope finding layer, and performing secondary press polishing and full moisture-preserving maintenance after the leveling layer receives water.

2) And (3) waterproof layer construction: when the high polymer modified asphalt waterproof coiled material is paved, the chloroprene rubber adhesive is diluted by adding industrial gasoline, the mixture is uniformly stirred, a long rolling brush is uniformly coated on the surface of the leveling layer, after 4 hours at normal temperature, additional layers are firstly made on details such as parapet walls, water falling ports, pipe roots, cornice inside and outside corners and the like, and then the coiled material is paved. When the coiled material is laid and attached, the joint of the base layer and the coiled material is heated by a flame spray gun, the spray gun is 300mm away from the surface of the coiled material, the coiled material is uniformly heated back and forth, when the surface of the coiled material is just melted, the coiled material is rolled forwards and attached, the overlapped part is firmly adhered, and the overlapping width is 80mm by a full adhesion method. Carrying out hot melting edge sealing after paving: heating the lap joint of the coiled materials by a spray gun, when the hot-melt modified asphalt overflows from the lap joint seam of the coiled materials, firmly bonding the lap joint seam of the coiled materials and the hot-melt modified asphalt, and tightly embedding and filling the tail end of the lap joint seam of the coiled materials by using sealing paste. And after the waterproof layer is finished, carrying out next procedure construction after 24-hour water storage or water spraying test folding grids.

3) Construction of a protective layer: and arranging a felt or non-woven fabric isolating layer on the waterproof layer, and laying a protective layer. The protective layer is made of fine-grained concrete with the strength grade not less than C20 and the thickness not less than 40mm, and is provided with a bidirectional phi 5@200 reinforcing mesh.

4) And (3) construction of a drainage layer: before laying the plastic drainage board, firstly checking whether the protective layer is flat or not, and whether the protective layer has the phenomena of pothole and hard object, and if so, timely trimming and repairing the base layer. After the base layer is repaired, the base layer is cleaned in time after the drying reaches the strength, then the salient points of the plastic drainage plate are upwards laid from the lowest drainage position to the high position, and the base layer is an upper laminated lower layer. The laying should be smooth and closely attached to the protective layer. When the gradient is less than 20 degrees, direct laying can be adopted without fixing measures, and when the gradient is more than 20 percent, the plastic drainage plate needs to adopt fixing measures, and a special adhesive and a base layer can be generally adopted for point adhesion or full adhesion bonding and fixing. The overlap joint of plastics drain bar divide into hot melt connection overlap joint and lock joint bonding overlap joint two kinds, and when the overlap joint was connected in the hot melt, adopt welding equipment to carry out the hot melt welding to the peripheral welding strip of plastics drain bar, and the overlap joint width is not less than 160 mm. When the plastic drainage plate needs to be cut and used to cause that the cutting side can not adopt welding lap joint, a lock joint bonding lap joint mode is adopted, the upper plate presses the lower plate during the lock joint lap joint, at least two rows or two rows of salient points are overlapped and locked, after special bonding glue is smeared on the contact surface of the two plate surfaces, a special rubber hammer is adopted to knock the lower plate to enable the lower plate to be tightly attached, and weight stacking is carried out for 8-10 minutes. The pipe mouth of the internal drainage pipe and the plastic drainage plate are fixed by drilling and nailing and then are sealed by caulking with synthetic polymer sealing materials such as polyurethane.

5) Construction of a filter layer: before the non-woven geotextile is laid, a dense-mesh polymer material barrier is additionally arranged between the plastic drainage plate and the non-woven geotextile, so that the stability of a water filtering and drainage system is enhanced, and the non-woven geotextile is prevented from being collapsed by planted soil. When the non-woven geotextile is laid, the geotextile roll is firstly opened, after the geotextile roll is straightened and leveled at an angle of 4 degrees, the geotextile is flattened and straightened in sections, and a heavy object is adopted to temporarily press the geotextile after the geotextile is laid once so as to prevent the geotextile from being blown up by wind. The seams of the non-woven geotextile are mutually overlapped and not less than 160mm, and the geotextile is covered with soil in time after being paved for 10-15m forwards. After a polymer material barrier with the width not less than 160mm is laid in the inner side of the retaining wall, the non-woven geotextile on the retaining wall is turned over for 110mm, then a concrete layer with the height of 110mm is constructed, and a stainless steel filter screen is arranged at a water falling port. Meanwhile, a side pressing abutment is constructed at the position of the roof outlet pipeline, and polyurethane is adopted for sealing the edge between the roof outlet pipeline and the top end of the side pressing abutment.

6) Laying a planting soil layer: when the designed soil covering thickness is smaller (less than 500mm), manual paving is adopted for soil covering, the soil covering is gradually pushed from one end to the other end during soil covering, a shovel operation mode is preferably adopted for the first layer of soil covering, the first layer of soil covering is piled on the non-woven geotextile layer by layer and covered to the thickness of 200-300mm, then a template is laid on the non-woven geotextile layer to form a transportation channel, and then a hopper car is adopted for carrying soil to push the non-woven geotextile layer by layer to the designed soil covering thickness. When the design covering soil thickness exceeds 500mm, for example, in the planting layer of some basement roofs, the local soil body can be more than 1m thick, at the moment, the covering soil work is carried out in two steps, the soil with the thickness of 500mm above the geotextile is manually paved layer by layer after being transported to the field by a machine, the thickness of each layer is 250mm, the manual virtual paving thickness is 500mm, the rolling is carried out by a small rolling machine for not less than 2 times, and then the mechanical operation layering rolling is carried out every 30cm thick. And hard objects such as sand and stones at the bottom are picked up in time in the soil paving process, so that the drainage plate is prevented from being damaged.

7) And (3) vegetation planting: ornamental plants such as flowers, grasses, vines, small trees and the like with strong adaptability, drought resistance, barren resistance and light preference are selected to be planted on the planting soil layer.

It should be noted that the above-mentioned preferred embodiments are merely illustrative of the technical concepts and features of the present invention, and are intended to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.

Claims

1. Plant roofing, including roof covering (1), be provided with escape canal, mouth of falling into water and go out the roofing pipeline on roof covering (1), escape canal department is provided with retaining wall, its characterized in that, waterproof layer (2), protective layer (3), drainage blanket (4), filter layer (5), planting soil layer (6) and vegetation greening layer (7) have set gradually from bottom to top on roof covering (1), waterproof layer (2) adopt waterproofing membrane, drainage blanket (4) adopt the fulcrum formula plastics drain bar that is equipped with the bump, filter layer (5) adopt nonwoven geotechnological cloth, be provided with the barrier between drainage blanket (4) and filter layer (5).

2. The planted roof of claim 1, wherein the plastic drainage plates are fastened or thermally fused.

3. The planted roof according to claim 2, wherein when the plastic drainage plates are fastened, at least two rows or two columns of the convex points are overlapped and fastened, and the fastening contact surface is provided with glue.

4. The planted roof according to claim 1, wherein a retaining wall (8) is arranged around the drainage ditch of the roof layer (1), a cover plate (9) is arranged between the upper end of the retaining wall (8) and the parapet wall, a drainage hole (10) is arranged at the root of the retaining wall (8), the end part of the plastic drainage plate is tightly attached to the drainage hole (10) of the retaining wall (8), a concrete layer (11) is arranged between the planted soil layer (6) and the retaining wall (8), and the end part of the non-woven geotextile is upturned onto the retaining wall (8) and is positioned between the retaining wall (8) and the concrete layer (11).

5. The planted roof according to claim 1, wherein an outer water drainage pipe (12) is arranged at a water falling port of the roof layer (1), an inner water drainage pipe (13) is coaxially sleeved in the outer water drainage pipe (12), the pipe diameter of the inner water drainage pipe (13) is smaller than that of the outer water drainage pipe (12), a protective cover (14) capable of draining water is arranged at the top of the inner water drainage pipe (13), the waterproof layer (2) extends from the roof layer (1) to the pipe orifice of the outer drain pipe (12), the end part of the protective layer (3) is tightly attached to the outer wall of the inner drain pipe (13), the drain layer (4) is fixedly connected with the pipe orifice of the inner drain pipe (13), a caulking sealing ring (15) is arranged between the drainage layer (4) and the inner drainage pipe (13), the filter layer (5) is arranged above the drainage layer (4) and the protective cover (14), and a fence (16) surrounding the drain hole is arranged above the filter layer (5).

6. The planted roof according to claim 1, wherein a sealing layer (18) is arranged on the pipe wall of the roofing outlet pipeline (17), a buffering slope (19) is arranged around the upper portion of the joint of the roofing outlet pipeline (17) and the roof layer (1), the waterproof layer (2), the protective layer (3), the drainage layer (4) and the filter layer (5) are all turned upwards along the buffering slope (19), and a blank pressing abutment (20) is arranged between the roofing outlet pipeline (17) and the planted soil layer (6).

7. The construction method for the planted roof is characterized by comprising the following steps:

8. The method for planting a roof according to claim 7, wherein in the step 3), when the slope of the roof is greater than 20 degrees, the plastic drainage layer and the protective layer are fixedly bonded by using an adhesive.