Roofing construction with three times of drainage and construction method thereof

Abstract

The application discloses a roof structure with three times of drainage and a construction process thereof. The roof structure comprises a roof body. From top to bottom, the roof body comprises at least a surface layer, a waterproof layer, an insulation layer and a sloping layer. The roof body further comprises a rainwater hopper structure. The surface layer and the waterproof layer are respectively inclined towards the rainwater hopper structure to form a first drainage path and a second drainage path. A non-solidified rubber asphalt layer is formed between the sloping layer and the insulation layer, and the non-solidified rubber asphalt layer forms a third drainage path on the sloping layer. From top to bottom, the rainwater hopper body comprises at least two collecting cavities embedded in the roof structure. A disc-shaped collecting cavity located in the upper layer and a bowl-shaped collecting cavity located in the lower layer are formed. The disc-shaped collecting cavity and the bowl-shaped collecting cavity are respectively cast between the waterproof layer and the insulation layer and in the sloping layer.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of roof waterproof structure, and particularly relates to a roof structure with three times of drainage and a construction method thereof. BACKGROUND

[0002] The vertical rainwater hopper is mainly used for indoor buildings, such as shopping malls, and is vertically assembled in the indoor for drainage through the roof structure. The vertical rainwater hopper in the prior art mainly realizes roof waterproofing through two times of waterproofing, specifically: first, the waterproofing membrane of the roof is extended to form a guide surface, so that the waterproofing membrane extends into the downspout, and then when draining, the waterproofing membrane can guide the rainwater on the roof to realize the waterproofing of the top layer of the roof, and then a step structure is formed in the mortar layer, so that the water on the waterproofing membrane and the water of the mortar layer flow into the downspout to realize rainwater collection. In this way, the water seeps into the membrane, causing the membrane to bulge, affecting use, and at the same time, the rainwater hopper in the roof structure is part of the building roof drainage system, which is arranged at the inlet of the roof rainwater from the gutter into the rainwater pipe, so that the building roof rainwater can be quickly discharged to the rainwater pipe to avoid the adverse effects of roof water leakage and safety hazards. However, the roof surface layer ages and loses its ability after long-term use, which may cause leakage problems. Therefore, there is an urgent need for a roof structure with good waterproofing effect. SUMMARY

[0003] The present application aims to provide a roof structure with three times of drainage and a construction method thereof, which realizes three times of drainage and prolongs the service life of the roof structure. The roof structure in the present application has good waterproofing effect and can well solve the leakage problem caused by roof aging.

[0004] In order to achieve the above technical effects, the present application realizes the following technical means.

[0005] On the one hand, the present application discloses a roof structure with three times of drainage, comprising a roof body, from top to bottom, the roof body comprises at least a surface layer, a waterproof layer, an insulation layer and a sloping layer, and further comprising a rainwater hopper structure penetrating through the roof body;

[0006] The surface layer and the waterproof layer are respectively inclined towards the rainwater hopper structure to form a first drainage path and a second drainage path, a non-cured rubber asphalt layer is formed between the sloping layer and the insulation layer, and the non-cured rubber asphalt layer forms a third drainage path on the sloping layer;

[0007] From top to bottom, the rainwater hopper body comprises at least two collecting cavities embedded in the roof structure, a disc-shaped collecting cavity located in the upper layer and a bowl-shaped collecting cavity located in the lower part are formed, and the disc-shaped collecting cavity and the bowl-shaped collecting cavity are respectively cast between the waterproof layer and the insulation layer and in the sloping layer.

[0008] As a further improvement of the present application, a drain pipe is formed in the rainwater hopper body, the disc-shaped collecting cavity and the bowl-shaped collecting cavity form a drainage path towards the drain pipe, and the end of the drainage path communicates with the drain pipe through a first water passing hole.

[0009] As a further improvement of the present application, the bottom of the disc-shaped collecting cavity forms a first water filtering plate, the bowl-shaped collecting cavity extends towards the rainwater hopper structure to form a second water filtering plate, one side of the first and second water filtering plates is connected through the rainwater hopper structure, and the other side is connected through a separation net to form a filtering cavity.

[0010] As a further improvement of the present application, the second water filtering plate and the bowl-shaped collecting cavity form an opening in the rainwater hopper structure, and the water in the second water filtering plate flows into the rainwater hopper body along the opening.

[0011] As a further improvement of the present application, the end of the bowl-shaped collecting cavity extends towards the internal drainage layer to form a beak structure, and the beak structure causes the water in the bowl-shaped collecting cavity to be intercepted in the collecting cavity.

[0012] As a further improvement of the present application, a surface cover is arranged on the disc-shaped collecting cavity, and the surface cover forms a support surface for the surface layer.

[0013] In another aspect, the present application also discloses a construction method of a roof structure with three times of drainage, comprising the following steps:

[0014] S1) Pouring of the bowl-shaped collecting cavity: placing the rainwater hopper body at a set position, pouring the internal drainage layer, and pouring the bowl-shaped collecting cavity at a set height of the internal drainage layer according to the design, and the upper surface of the internal drainage layer forms a guide path towards the rainwater hopper body;

[0015] S2) Construction of the non-solidified rubber asphalt layer: constructing the non-solidified rubber asphalt layer on the internal drainage layer to the lower surface of the disc-shaped collecting cavity, and the non-solidified rubber asphalt layer extends towards the rainwater hopper body to form a third drainage path;

[0016] S3) Construction of the thermal insulation layer: constructing the thermal insulation layer on the non-solidified rubber asphalt layer, and the upper surface of the thermal insulation layer is level with the upper surface of the disc-shaped collecting cavity, so that the disc-shaped collecting cavity is partially embedded in the thermal insulation layer at a set position;

[0017] S4) Construction of the waterproof layer: laying the waterproof layer along the upper surface of the thermal insulation layer, and the end of the waterproof layer is located in the disc-shaped collecting cavity to form a second drainage path;

[0018] S5) surface layer construction: add inclined bracing on the disc-shaped collection cavity, assemble the surface cover with the inclined bracing as the supporting surface, and then lay the downward rainwater hopper structure inclined surface layer to form the first drainage path.

[0019] As a further improvement of the application, in the pouring of the bowl-shaped collection cavity, specifically, the hawk's beak structure of the bowl-shaped collection cavity is poured into the slope layer.

[0020] As a further improvement of the application, it also includes slope layer construction, specifically: setting a slope line, layer by layer pouring and constructing on the slope line to form a slope layer, so that the upper surface of the slope layer forms a slope with a slope of 5 / 1000, and the lower skin height of the disc-shaped collection cavity is the lowest point elevation of the slope layer.

[0021] As a further improvement of the application, it also includes prefabrication of the rainwater hopper body, specifically: prefabricating a rainwater hopper body with a bowl-shaped collection cavity and a disc-shaped collection cavity, and connecting the bowl-shaped collection cavity and the disc-shaped collection cavity with a separation net to form a filter cavity.

[0022] The beneficial effects of the application are as follows:

[0023] In the application, the improved rainwater hopper structure is combined with the structure of the roof body to form three levels of drainage paths in the roof body, so that even if water droplets penetrate, they will flow into the rainwater hopper structure through the secondary drainage path and be discharged.

[0024] In the application, due to the pouring assembly of the rainwater hopper, the structure plate is poured at one time during construction, avoiding secondary sealing after hoisting the mold, reducing the construction difficulty, meeting the requirements of green construction, and the construction process is simple, the repair rate is low, and it is safe and convenient.

[0025] In the application, the multi-layer waterproofing effectively prevents roof leakage after long-term use, improving the quality of the roof. BRIEF DESCRIPTION OF DRAWINGS

[0026] Fig. 1 A structure diagram of a roof structure with three times of drainage is provided in the application;

[0027] Fig. 2 A structure diagram of a rainwater hopper body is provided in the application;

[0028] Fig. 3 A flowchart of the construction process of a roof structure with three times of drainage is provided in the application;

[0029] In the drawings:

[0030] 100, roof body; 110, surface layer; 120, waterproof layer; 130, thermal insulation layer; 140, sloping layer; 150, uncured rubber asphalt layer; 160, 170, 200, rainwater hopper structure; 210, disc-shaped collection cavity; 211, first water filter plate; 212, third water passage; 220, bowl-shaped collection cavity; 221, first water passage; 222, second water filter plate; 223, hawk's beak structure; 230, isolation net; 231, second water passage; 240, gap; 250, surface cover. DETAILED DESCRIPTION

[0031] The present application will be described in detail below with reference to the embodiments shown in the drawings, but it should be noted that these embodiments are not a limitation on the present application, and equivalent transformations or substitutions of function, method, or structure made by those of ordinary skill in the art based on these embodiments are within the scope of the present application.

[0032] Referring to the drawings Figs. 1-3 The present application discloses a roof structure with three drainage, comprising a roof body 100, from top to bottom, the roof body 100 at least includes a surface layer 110, a waterproof layer 120, a thermal insulation layer 130 and a sloping layer 140, further comprising a rainwater hopper structure 200 through the roof body;

[0033] In this embodiment, when designing the rainwater hopper structure, it is fully integrated with the roof structure, specifically, the surface layer 110 and the waterproof layer 120 are respectively inclined towards the rainwater hopper structure 200 to form the first drainage path and the second drainage path, so that the upper surface of the surface layer 110 and the waterproof layer 120 forms an inclined surface towards the rainwater hopper structure, thereby forming the first drainage path and the second drainage path, the inclination in this case is a thousandth of the sloping layer, in this embodiment, in order to avoid further water seepage of the sloping layer and the lower layer, an uncured rubber asphalt layer 150 is formed between the sloping layer 140 and the thermal insulation layer 130, the uncured rubber asphalt layer 150 forms a third drainage path on the sloping layer 140; compared with the prior art which only has two drainage paths, the present application forms three drainage paths, so that the water extending into the roof structure can be drained along the three drainage paths, solving the leakage problem caused by roof aging and improving the service life of the house.

[0034] In order to further integrate with the roof structure and improve the waterproof effect, the rainwater head body 200 comprises at least two layers of collecting cavities embedded in the roof structure from top to bottom, and a disc-shaped collecting cavity 210 located at the upper layer and a bowl-shaped collecting cavity 220 located at the lower part are formed, and the disc-shaped collecting cavity 210 and the bowl-shaped collecting cavity 220 are respectively cast between the waterproof layer 120 and the thermal insulation layer 130 and in the slope layer 140. In the application, the embedded mode is used instead of direct assembly, which ensures the firmness of the secondary drainage path and the rainwater head structure. In specific use, three times of drainage are completed through the "three-layer flow guide drainage", thereby effectively preventing the roof leakage problem after long-term use. In the embodiment, the first drainage path is the surface layer, which collects and drains from the surface, the second drainage path is the waterproof coiled material path, which is used when the roof surface layer ages, and the third drainage path is the flexible secondary drainage path formed by the non-solidified rubber asphalt layer, which also forms a slope on the slope layer, so that the water under the thermal insulation layer can flow out along the slope. When the structure plate of the roof structure is slightly uneven, the flexibility of the non-solidified rubber asphalt layer can prevent the structure plate from being pulled apart, thereby effectively preventing the roof leakage problem after long-term use through the "three times of flow guide drainage".

[0035] In the application, two different modes are selected for the rainwater head structure, the disc-shaped collecting cavity has a large collection surface but a shallow depth, and the bowl-shaped collecting cavity has a small collection cavity but a deep depth, so that different types of rainwater collecting cavities are formed. The upper part has more seepage, so the disc-shaped collecting cavity 210 is selected to collect as much seepage as possible. The lower part has less seepage, but it can bear the weight in the case of accidental falling of the upper part, so the deep bowl-shaped collecting cavity 220 is selected to accommodate more.

[0036] Specifically, a drainage pipe is formed in the rainwater head body 200, the disc-shaped collecting cavity 210 and the bowl-shaped collecting cavity 220 form a drainage path towards the drainage pipe, and the end of the drainage path is communicated with the drainage pipe through a first water passing hole 221. In order to discharge rainwater and the like in the collecting cavities, the two collecting cavities need to be drained into the drainage pipe, and in the application, the two collecting cavities are drained through one water passing hole 221, which reduces the setting of the water passing hole on the drainage pipe and improves the strength of the whole drainage pipe.

[0037] Referring to the accompanying drawings, in this invention, a first filter plate 211 is formed at the bottom of the disc-shaped collection chamber 210, and a second filter plate 222 is formed by extending the bowl-shaped collection chamber 220 toward the rainwater hopper structure. The first filter plate 221 and the second filter plate 222 are connected on one side by the rainwater hopper structure 200 and on the other side by an isolation net 230, forming a filtration chamber. In this embodiment, the filter plate is formed at the bottom of the collection chamber, allowing seepage water to enter the second filter plate 222 through the first filter plate 221. Then, the two are connected by the rainwater hopper structure 200 to form an integrated structure with greater strength.

[0038] In one embodiment, the second filter plate 222 and the bowl-shaped collection chamber 210 form a notch 240 within the rainwater hopper structure 200. Water seeping from the second filter plate 222 flows into the rainwater hopper body 200 along the notch 240. In this embodiment, the notch 240 allows for partial cutting of the drain pipe, followed by a transition through the collection chamber, enabling the drain pipe to be connected vertically through the notch. The notch provides a buffer for the drainage within the drain pipe, allowing for the collection of more drainage at the notch compared to a straight pipe, thus increasing the discharge capacity.

[0039] In one embodiment, the end of the bowl-shaped collection cavity 220 extends into the slope-forming layer 140, forming a beak structure 223. The beak structure 223 traps water within the bowl-shaped collection cavity 220. In this embodiment, the added beak structure 223 partially isolates the top of the bowl-shaped collection cavity 220 from the roof structure, specifically from the slope-forming layer 140. Therefore, in the event of an accident, seepage water from the bowl-shaped collection cavity 220 will not flow through the bowl-shaped collection cavity 220 into the slope-forming layer outside the beak structure 223, thus protecting the slope-forming layer.

[0040] In one embodiment, the disc-shaped collection cavity 210 is provided with a cover 250, which forms a support surface for supporting the surface layer 110. In this embodiment, the cover 250 is provided and then supported by a plurality of inclined rods within the disc-shaped collection cavity 210, and the cover 250 can serve as a support construction surface to support the surface layer.

[0041] On the other hand, the present invention also discloses a construction method for a roof structure with three-stage drainage, comprising the following steps:

[0042] S1) Pouring of the bowl-shaped collection cavity 220: Place the rainwater pipe body 200 at a set position, pour the slope layer 140, so that the bowl-shaped collection cavity 220 is poured according to the design at a set height of the slope layer 140, and the upper surface of the slope layer 140 forms a guide path towards the rainwater pipe body 200. At this time, the pouring construction is such that the bowl-shaped collection cavity 220 is directly poured therein, avoiding later hoisting of the mold for secondary plugging, reducing the construction difficulty, and also meeting the requirements of green construction.

[0043] S2) Non-cured rubber asphalt layer 150 construction: The non-cured rubber asphalt layer 150 is constructed on the slope layer 140 to the lower skin of the disc-shaped collection cavity 210, and the non-cured rubber asphalt layer 150 extends towards the rainwater pipe body 200 to form a third drainage path. In this embodiment, the non-cured rubber asphalt is used as the third drainage path, and the low-temperature flexibility, water channeling resistance and ductility of the non-cured rubber asphalt are used to form good waterproofing on the slope layer, avoiding water seepage on the slope layer 140 and the slope coating layer formed thereon, and ensuring the waterproofing effect.

[0044] S3) Construction of the thermal insulation layer: The thermal insulation layer 130 is constructed on the non-cured rubber asphalt layer 150, and the upper surface of the thermal insulation layer 130 is level with the upper surface of the disc-shaped collection cavity 210, so that the disc-shaped collection cavity 210 is partially embedded in the thermal insulation layer 130 at a set position.

[0045] S4) Construction of the waterproof layer 120: The waterproof layer 120 is laid along the upper surface of the thermal insulation layer 130, so that the closure of the waterproof layer 120 is located in the disc-shaped collection cavity 210 to form a second drainage path. At this time, the area above the thermal insulation layer can be waterproofed, and the closure is located in the disc-shaped collection cavity 210, so that the entire thermal insulation layer 130 supports the disc-shaped collection cavity 210.

[0046] S5) Construction of the surface layer: Inclined struts are added to the disc-shaped collection cavity 210, and the surface layer 110 is laid on the inclined struts as the support surface to form a first drainage path.

[0047] In one embodiment, in the step S1) pouring of the bowl-shaped collection cavity 220, specifically, the hawk's beak structure 223 of the bowl-shaped collection cavity 220 is poured into the slope layer 140. In this embodiment, the pouring of the hawk's beak structure 223 makes it pre-embedded in the slope layer 140, so that the outer side of the slope layer is isolated from the bowl-shaped collection cavity 220. In the event of an accident causing the upper structure to fall, water in the bowl-shaped collection cavity 220 will not flow to the outside of the slope layer 140.

[0048] In one embodiment, the construction of the slope-finding layer 140 is also included, specifically: setting a slope-finding line, layer-by-layer pouring construction on the slope-finding line to form the slope-finding layer 140, so that the upper surface of the slope-finding layer 140 forms a slope with a slope of 5‰, and the lower skin height of the disc-shaped collection cavity 210 is taken as the lowest point elevation of the slope-finding layer 140, so that the side of the disc-shaped collection cavity 210 is pressed into the thermal insulation layer. In this embodiment, layer-by-layer pouring can accurately control the slope elevation and ensure the construction quality; the concrete is poured to the bottom of the disc-shaped collection cavity, and the disc-shaped collection cavity is not involved, and the side of the disc-shaped collection cavity is pressed into the thermal insulation layer

[0049] In one embodiment, the prefabrication of the rainwater collector body 200 is also included, specifically: prefabricating the rainwater collector body 200 with the bowl-shaped collection cavity 220 and the disc-shaped collection cavity 210, and connecting the bowl-shaped collection cavity 220 and the disc-shaped collection cavity 210 by the isolation net 230 to form the filter cavity. In this embodiment, the isolation net is used to realize the isolation between the collection cavity and the outer side of the roof body 100, and the second water passing hole 231 is also arranged on the isolation net, so that the outside seepage water seeps into the collection cavity through the second water passing hole 231, and the collection of the outside seepage water is completed.

[0050] In order to realize the seepage of the collected rainwater, the third water passing hole 212 is arranged on the first filter plate 211, which seeps the water in the disc-shaped collection cavity 210 into the bowl-shaped collection cavity 220, and then the seepage water outside the roof body isolation net seeps into the bowl-shaped collection cavity 220 through the second water passing hole 231, and finally enters the drain pipe through the first water passing hole 221, and the discharge is completed.

[0051] The roof structure in the application mainly includes the slope-finding layer 140 with a slope of 5‰ formed by the structure layer and the slope finding, the waterproof coating layer (that is, the coating layer and the slope-finding layer with a slope constitute the entire slope-finding layer 140, and the upper slope-finding layer protects the coating layer, avoiding the seepage water from entering the coating layer and affecting the effect of the coating layer), the thermal insulation layer 130 (mainly the building method between the additional layer and the waterproof layer), the waterproof (coiled material) layer (that is, the waterproof layer 120), and the surface layer 110. The construction process steps of the roof structure in the application are as follows:

[0052] (1) The rainwater collector involving two collection cavities in the application is pre-buried at the drain port in the steel reinforcement mesh of the concrete structure plate. During the concrete pouring process, the verticality is ensured by real-time monitoring of the verticality and observation of the pouring condition.

[0053] (2) Structure plate pouring: at the roof parapet wall, equipment foundation and other positions, set the slope-finding line, pour several times according to the thinnest part, specifically: select layer-by-layer pouring to meet the slope of 5‰, and use the lower skin of the disc-shaped collection cavity to control the lowest point elevation of the structure plate.

[0054] (3) waterproof coating construction: waterproof coating layer is daubed to the lower skin of the rainwater dish-shaped collection cavity, if the structural plate cracks, sanding and other reasons due to maintenance not in place, etc., cracks in the structural plate can be filled through the self-healing and flexibility of the waterproof roll, and the structural self-waterproof performance is strengthened.

[0055] (4) insulation layer construction: extruded polystyrene is laid on the roof, and the insulation board is cut to ensure that the edges are straight and neat, and the heights of the adjacent two board surfaces are consistent; the height of the cavity of the dish-shaped body is consistent with the insulation layer; the mortar cake is pasted on the slope layer, and the dot spacing is 1.5m; the lowest point of the rainwater inlet is found within 200mm, and the slope is found at 1:10.

[0056] (5) secondary drainage path construction: the base layer is cleaned, and the water content is less than 9%; the elastic line is: the additional layer of the roll and the roll edge line are popped out on the leveling layer, and the reserved lap joint edge line is more than 100mm; the exhaust duct is laid and pasted with an additional layer of 150mm, the base layer treatment agent cold primer is sprayed, and the waterproof roll is laid and pasted after the base layer is dried; the additional layer with a width of not less than 250mm (horizontal, vertical) is set at the root of the parapet wall, the female-male corner (30-50mm), and the equipment foundation; the first layer of waterproof roll is laid and pasted from the rainwater inlet of the roof to the ridge, and the lap joint direction is consistent with the water flow direction; the base layer and the roll are heated with a flame spray gun at any time during laying.

[0057] (6) protective layer surface layer construction: the rainwater inlet is covered before the surface layer construction, which can support the surface layer material and ensure the integrity

[0058] The roof structure in the application has the following characteristics:

[0059] ① The structure slope is a waterproof additional layer guide

[0060] ② The height of the dish-shaped body matches the building method height

[0061] ③ The concrete isolation net (water filter net) makes the bowl-shaped body form a hawk's beak, which is beneficial to the slope guide

[0062] ④ The bowl-shaped structure is beneficial to water flow convergence

[0063] ⑤ The dish-shaped body lower skin is the lowest point of the concrete plate elevation

[0064] ⑥ The dish-shaped body cavity prevents water backflow, which makes the roll edge curl up, and makes the water backflow.

[0065] In the application, the protective layer 5‰ slope, 1.5mm thick synthetic polymer waterproof coating (low temperature flexibility, heat resistance, ductility, self-healing), new structure concrete surface unevenness, concrete internal cracks, prevent being pulled apart, the lowest point "pan type bucket body" bottom flat), 1.5mm thick synthetic polymer waterproof coating is arranged above, the original design method, water hole, filter / water permeable steel wire mesh (concrete interception net, mesh density) concrete upper water drainage to the bowl type bucket body of rainwater head, the waterproof coiled material (roof surface layer aging) in the application, flexible waterproof (structure plate unevenness, prevent structure plate from being pulled apart), simple construction process, low post-repair rate, safe and convenient, effectively prevent and control the roof leakage problem after long-term use through "three-layer diversion drainage", and the roof quality is improved.

[0066] In the application, when waterproofing, the special rainwater head structure makes the water seepage of each secondary drainage path have a certain flow space, and the water in the two collection cavities is sequentially collected and then finally enters the drain pipe through the first water hole 231 at the bottom to complete the drainage work. In the embodiment, specifically, the coating layer 160 and the concrete layer 170 are arranged below the slope layer 140, and the existence of the non-solidified rubber asphalt layer also reduces the influence of water seepage on the coating layer 160 and the concrete layer 170.

[0067] The series of detailed descriptions listed above are only specific descriptions of the feasible implementation modes of the application, and are not used to limit the protection scope of the application, and equivalent implementation modes or changes made without departing from the spirit of the application should be included in the protection scope of the application.

[0068] It is obvious for those skilled in the art that the application is not limited to the details of the above exemplary embodiments, and the application can be realized in other specific forms without departing from the spirit or essential characteristics of the application. Therefore, the embodiments should be regarded as exemplary and non-limiting, the scope of the application is defined by the appended claims rather than the above description, and all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the application. Any reference signs in the claims should not be regarded as limiting the claims involved.

[0069] In addition, it should be understood that although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description manner of the specification is only for the sake of clarity, those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that those skilled in the art can understand.

Claims

1. A roof construction with three times drainage, characterized in that, The roof body comprises, from top to bottom, a surface layer, a waterproof layer, an insulation layer, and a sloping layer, and further comprises a rainwater pipe structure penetrating through the roof body; The surface layer and the waterproof layer are respectively inclined towards the rainwater pipe structure to form a first drainage path and a second drainage path, a non-solidified rubber asphalt layer is formed between the sloping layer and the insulation layer, and the non-solidified rubber asphalt layer forms a third drainage path on the sloping layer; From top to bottom, the rainwater pipe structure comprises at least two collecting cavities pre-embedded in the roof structure, a disc-shaped collecting cavity located at the upper layer and a bowl-shaped collecting cavity located at the lower layer, the disc-shaped collecting cavity and the bowl-shaped collecting cavity are respectively cast between the waterproof layer and the insulation layer, and in the sloping layer; The bottom of the disc-shaped collecting cavity forms a first water filter plate, the bowl-shaped collecting cavity extends towards the rainwater pipe structure to form a second water filter plate, one side of the first water filter plate and the second water filter plate is connected through the rainwater pipe structure, and the other side is connected through a separation net to form a filtering cavity; The second water filter plate and the bowl-shaped collecting cavity form an opening in the rainwater pipe structure, and water in the second water filter plate flows into the rainwater pipe structure along the opening.

2. A roof construction with three times drainage according to claim 1, characterized in that A drainage pipe is formed in the rainwater pipe structure, the disc-shaped collecting cavity and the bowl-shaped collecting cavity form a drainage path towards the drainage pipe, and the end of the drainage path is communicated with the drainage pipe through a first water hole.

3. A roof construction with three times drainage according to claim 1, characterized in that, The end of the bowl-shaped collecting cavity extends towards the sloping layer to form a hawk's beak structure, and the hawk's beak structure causes the water in the bowl-shaped collecting cavity to be intercepted in the collecting cavity.

4. A roof construction with three-way drainage according to claim 1, characterized in that A surface cover is arranged on the disc-shaped collecting cavity, and the surface cover forms a support surface for supporting the surface layer.

5. A method of constructing a roof construction with three drainage, characterized in that The method comprises the following steps: S1) pouring of the bowl-shaped collecting cavity: placing the rainwater pipe structure at a set position, pouring the sloping layer, and pouring the bowl-shaped collecting cavity at a set height of the sloping layer according to the design, and the upper surface of the sloping layer forms a guide path towards the rainwater pipe structure; S2) construction of the non-solidified rubber asphalt layer: constructing the non-solidified rubber asphalt layer on the sloping layer to the lower surface of the disc-shaped collecting cavity, and extending the non-solidified rubber asphalt layer towards the rainwater pipe structure to form a third drainage path; S3) construction of the insulation layer: constructing the insulation layer on the non-solidified rubber asphalt layer, and making the upper surface of the insulation layer level with the upper surface of the disc-shaped collecting cavity, so that the disc-shaped collecting cavity is partially pre-embedded in the insulation layer at a set position; S4) construction of the waterproof layer: laying the waterproof layer along the upper surface of the insulation layer, and making the end of the waterproof layer in the disc-shaped collecting cavity to form a second drainage path; S5) construction of the surface layer: adding diagonal braces on the disc-shaped collecting cavity, assembling a surface cover as a support surface with the diagonal braces as a support surface, and laying the surface layer inclined towards the rainwater pipe structure to form a first drainage path; Further, the rainwater pipe structure is prefabricated, specifically, the rainwater pipe structure with the bowl-shaped collecting cavity and the disc-shaped collecting cavity is prefabricated, and the bowl-shaped collecting cavity and the disc-shaped collecting cavity are connected by a separation net to form a filtering cavity.

6. The method of constructing a roof construction with three discharges according to claim 5, characterized in that, In the step S1) of pouring the bowl-shaped collecting cavity, the hawk's beak structure of the bowl-shaped collecting cavity is poured into the sloping layer.

7. The method of constructing a roof construction with three discharges according to claim 5, characterized in that, Further comprising the construction of the slope-finding layer, specifically: setting a slope-finding line, layer by layer pouring construction on the slope-finding line to form the slope-finding layer, so that the upper surface of the slope-finding layer forms a slope with a slope of 1 / 1000, and the lower skin height of the disc-shaped collecting cavity is the lowest point elevation of the slope-finding layer.

Images