Bidirectional large-span reinforced concrete solid web girder structure double-layer roof system and building
By adopting a two-way large-span reinforced concrete solid-belt structure double-layer roof system on the roof of a large span building, the drainage channels designed by the mezzanine cavity and slope unit, combined with drainage components such as water conduit pipes, the problems of difficulty in drainage and low efficiency of the roof of a large span building are solved, and efficient drainage and complete utilization of space are achieved.
Patent Information
- Application Number
- CN202421878685.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-05
- Publication Date
- 2025-05-27
- Estimated Expiration
- 2034-08-05
AI Technical Summary
The roof of large span buildings is difficult to drain and low efficiency. The layout of drainage pipes in traditional drainage systems will occupy indoor and outdoor space, affecting the integrity and utilization of the space.
A two-way large-span reinforced concrete solid-belt structure double-layer roof system is adopted. Through the interlayer cavity and slope unit design between the upper and lower tops, multiple drainage channels are formed, and rainwater is exported using drainage components such as water conduits.
It effectively solves the problems of difficulty in draining and low efficiency in the roof of large span buildings, improves drainage efficiency, and the drainage components are located in the mezzanine cavity, do not occupy indoor and outdoor space, ensuring the integrity and efficient use of the space.
Smart Images
Figure CN222909252U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of buildings, in particular to a double-layer roof system and a building with a two-way long-span reinforced concrete solid web beam structure. Background Technique
[0002] Drainage is an important function of building construction, mainly used to effectively treat rainwater, avoid the erosion of building structures by rainwater, and is conducive to maintaining the stability of building structures. For roof drainage, there are mainly organized drainage and unorganized drainage at present.
[0003] Among them, unorganized drainage means that the roof rainwater drips freely from the eaves to the outdoor ground. However, when using this drainage method, the freely falling roof rainwater will splash and wet the wall surface, easily causing erosion of the outer wall corners. In contrast, organized drainage reduces the adverse effects of rainwater on the building by setting gutters between two spans of the building roof and organically discharging the rainwater to the ground or underground pipe trenches through structures such as rainwater funnels and rainwater pipes, and thus has been widely used.
[0004] However, with the increasing development of the design and construction technology of long-span space structures, large-span and complex-shaped high-rise space buildings with wide roofs have been widely used in projects such as stadiums, exhibition centers, and commercial complexes. The traditional drainage system is obviously insufficient to meet the drainage requirements of the long-span building roof, resulting in difficult and inefficient roof drainage of the building; in addition, in the traditional drainage system, the layout of drainage pipes will occupy indoor and outdoor spaces, affecting the integrity and utilization rate of the space. Content of the Utility Model
[0005] The embodiment of the utility model provides a double-layer roof system and a building with a two-way long-span reinforced concrete solid web beam structure, which are used to solve the defects of difficult and inefficient drainage of the long-span building roof and the occupation of indoor and outdoor spaces by drainage pipes in the prior art, can improve the drainage efficiency, ensure the integrity of the space, and make full use of the space.
[0006] The utility model provides a double-layer roof system with a two-way long-span reinforced concrete solid web beam structure, including: an upper roof and a lower roof;
[0007] A plurality of interlayer cavities are formed between the upper roof and the lower roof;
[0008] A plurality of first slope units corresponding to the interlayer cavities are arranged on the upper roof. The first slope unit includes a first slope surface, and one side of the first slope surface is inclined in a direction gradually approaching the lower roof, so that the first slope unit forms a low point;
[0009] A drain hole is provided at the top of the upper layer near the low point of the first slope unit, and the drain hole communicates with the interlayer cavity; a drainage member is provided in the interlayer cavity for discharging rainwater entering the interlayer cavity.
[0010] According to a double-layer roof system of a two-way long-span reinforced concrete solid web beam structure provided by the present utility model, a plurality of second slope units corresponding to the interlayer cavity are provided on the top of the lower layer. The second slope unit includes a second inclined surface, and the drain hole corresponds to the second inclined surface;
[0011] One side of the second inclined surface is inclined in a direction gradually away from the top of the upper layer, so that the second slope unit forms a low point, and the drainage member is arranged at the low point of the second slope unit.
[0012] According to a double-layer roof system of a two-way long-span reinforced concrete solid web beam structure provided by the present utility model, the first slope unit includes a plurality of the first inclined surfaces, and the plurality of the first inclined surfaces are spliced in sequence so that the first slope unit presents a trough-shaped structure with a polygonal cross-section; a plurality of the first slope units are arranged in an array and cover the entire top of the upper layer.
[0013] According to a double-layer roof system of a two-way long-span reinforced concrete solid web beam structure provided by the present utility model, the second slope unit includes a plurality of the second inclined surfaces, and the plurality of the second inclined surfaces are spliced in sequence so that the second slope unit presents a convex platform structure with a polygonal cross-section;
[0014] A plurality of the second slope units are arranged in an array and cover the entire top of the lower layer; the low point of the first slope unit corresponds to the high point position of the second slope unit.
[0015] According to a double-layer roof system of a two-way long-span reinforced concrete solid web beam structure provided by the present utility model, a skylight is further included between the low point of the first slope unit and the high point of the second slope unit;
[0016] The window surface of the skylight is inclined from the middle to the periphery in a direction gradually approaching the top of the lower layer, forming a low point of the skylight, and the position of the drain hole corresponds to the low point position of the skylight.
[0017] According to a double-layer roof system of a two-way long-span reinforced concrete solid web beam structure provided by the present utility model, the drainage member includes a water guide pipe, and the water guide pipe is arranged at a preset slope.
[0018] According to a double-layer roof system of a two-way long-span reinforced concrete solid web beam structure provided by the present utility model, a support beam is further included in the interlayer cavity for supporting the top of the upper layer.
[0019] A double - layer roof system of a two - way long - span reinforced concrete solid web beam structure provided by the present utility model, wherein the support beam includes a plurality of cross beams and longitudinal beams arranged in a grid structure in a cross - arranged manner;
[0020] The first slope unit, the second slope unit and the space area formed by the cross beam and the longitudinal beam are arranged in one - to - one correspondence.
[0021] A double - layer roof system of a two - way long - span reinforced concrete solid web beam structure provided by the present utility model, wherein the drainage member is arranged in the support beam.
[0022] The present utility model also provides a building, which includes a building main body and the double - layer roof system of the two - way long - span reinforced concrete solid web beam structure as described in any one of the above on the top of the building main body.
[0023] A building provided by the present utility model, wherein the building main body includes a perimeter wall and structural columns for connecting the double - layer roof system of the two - way long - span reinforced concrete solid web beam structure and the ground.
[0024] A building provided by the present utility model, wherein the building main body further includes an outer corridor, the structural columns of the outer corridor are arranged in a plate shape, and the structural columns are arranged in a plate shape and form a colonnade with the structural columns of the outer corridor.
[0025] For the double - layer roof system of the two - way long - span reinforced concrete solid web beam structure and the building provided by the present utility model, when the above - mentioned double - layer roof system is applied to a building, the upper roof is used as the outer roof of the building, and the lower roof is used as the inner roof of the building. When it rains, the first inclined surface can direct the rainwater to the low point of the first slope unit, and then the rainwater is introduced into the interlayer cavity through the drainage hole near the low point of the first slope unit. The drainage member located in the interlayer cavity can discharge the rainwater entering the interlayer cavity; due to the plurality of first slope units, the corresponding interlayer cavities and drainage members provided on the double - layer roof system, the rainwater on the roof can be discharged comprehensively and efficiently, effectively solving the problems of difficult drainage and low efficiency of the roof of large - span buildings in the related art; in addition, the drainage member is located in the interlayer cavity and does not occupy the indoor and outdoor spaces of the building, which is beneficial to ensuring the integrity of the indoor and outdoor spaces and improving the utilization rate of the indoor and outdoor spaces. BRIEF DESCRIPTION OF THE DRAWINGS
[0026] In order to more clearly illustrate the technical solutions in the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following - described drawings are some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.
[0027] Figure 1 It is a sectional view of a building provided by an embodiment of the present utility model.
[0028] Figure 2 It is a schematic structural diagram of a double-layer roof system of a two-way long-span reinforced concrete solid web beam structure provided by an embodiment of the present utility model.
[0029] Figure 3 It is a schematic structural diagram of the upper roof provided by an embodiment of the present utility model.
[0030] Figure 4 It is a schematic structural diagram of the lower roof provided by an embodiment of the present utility model.
[0031] Figure 5 It is a schematic structural diagram of a support beam provided by an embodiment of the present utility model.
[0032] Figure 6 It is an elevation view of a building provided by an embodiment of the present utility model.
[0033] Reference numerals:
[0034] 1. Upper roof; 10. First slope unit; 100. First inclined surface; 2. Lower roof; 20. Second slope unit; 200. Second inclined surface; 3. Mezzanine cavity; 4. Drainage hole; 5. Support beam; 50. Cross beam; 51. Longitudinal beam; 6. Skylight; 7. Building main body. Detailed implementation manners
[0035] To make the objectives, technical solutions and advantages of the present utility model clearer, the technical solutions in the present utility model will be clearly and completely described below with reference to the accompanying drawings in the present utility model. Apparently, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art without making creative efforts based on the embodiments in the present utility model belong to the scope of protection of the present utility model.
[0036] In the description of the embodiments of the present utility model, it should be noted that the orientation or positional relationships indicated by the terms "upper", "lower", "top", "bottom", etc. are based on the orientation or positional relationships shown in the accompanying drawings. It is only for the convenience of describing the embodiments of the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the embodiments of the present utility model. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.
[0037] To facilitate the understanding of the double - layer roof system and building with a two - way long - span reinforced concrete solid web beam structure provided by the present utility model, its application background will be introduced first. Roof drainage is an important function of building construction. Currently, it mainly includes organized drainage and unorganized drainage. Among them, unorganized drainage means that the roof rainwater freely drips to the outdoor ground from the eaves; organized drainage is achieved by setting a gutter between two spans of the building roof and organizing the rainwater to be discharged to the ground or underground pipe trench through structures such as rainwater funnels and rainwater pipes. Comparatively speaking, organized drainage can reduce the adverse effects of rainwater on the building, so it has been widely used.
[0038] With the increasing development and wide application of long - span buildings, the traditional drainage system is obviously insufficient to meet the drainage requirements of the wide and complex - shaped roofs of long - span buildings, resulting in difficult roof drainage and low efficiency. Moreover, in the traditional drainage system, the layout of drain pipes will occupy indoor and outdoor spaces, affecting the integrity and utilization rate of the space.
[0039] Based on the above problems, the present utility model provides a double - layer roof system and building with a two - way long - span reinforced concrete solid web beam structure, which can improve the drainage efficiency and ensure the integrity of the space, enabling the space to be fully utilized.
[0040] The following will Figures 1 - 6 describe the double - layer roof system and building with a two - way long - span reinforced concrete solid web beam structure of the present utility model.
[0041] Referring to Figure 1 and Figure 2 , a double - layer roof system with a two - way long - span reinforced concrete solid web beam structure includes an upper roof 1 and a lower roof 2. Among them, a plurality of interlayer cavities 3 are formed between the upper roof 1 and the lower roof 2; a plurality of first slope units 10 corresponding to the interlayer cavities 3 are arranged on the upper roof 1. The first slope unit 10 includes a first inclined surface 100, and one side of the first inclined surface 100 is inclined in a direction gradually approaching the lower roof 2, so that the first slope unit 10 forms a low point; a drain hole 4 is arranged on the upper roof 1 near the low point of the first slope, and the drain hole 4 is communicated with the interlayer cavity 3; a drainage member is arranged in the interlayer cavity 3 for discharging the rainwater entering the interlayer cavity 3.
[0042] In a specific application scenario, the above double-layer roof system is applied to a building. The upper roof 1 serves as the outer roof of the building, and the lower roof 2 serves as the inner roof of the building. When it rains, the first inclined surface 100 can direct rainwater to the low point of the first slope unit 10, and then the rainwater is introduced into the sandwich cavity 3 through the drain hole 4 near the low point of the first slope unit 10. The drainage member located in the sandwich cavity 3 can drain the rainwater entering the sandwich cavity 3; since there are multiple first slope units 10 on the double-layer roof system, as well as the corresponding sandwich cavities 3 and drainage members, the rainwater on the roof can be drained comprehensively and efficiently, effectively solving the problems of difficult drainage and low efficiency of the large-span building roof in the related technology; in addition, the drainage member is located in the sandwich cavity 3 and does not occupy the indoor and outdoor spaces of the building, which is beneficial to ensuring the integrity of the indoor and outdoor spaces and improving the utilization rate of the indoor and outdoor spaces.
[0043] In a specific embodiment of the present utility model, both the upper roof 1 and the lower roof 2 are cast from concrete materials; multiple second slope units 20 corresponding to the sandwich cavity 3 are provided on the lower roof 2. The second slope unit 20 includes a second inclined surface 200. The drain hole 4 corresponds to the second inclined surface 200. One side of the second inclined surface 200 is inclined in a direction gradually away from the upper roof 1, so that the second slope unit 20 forms a low point, and the drainage member is arranged at the low point of the second slope unit 20. In practical applications, after the rainwater enters the sandwich cavity 3 through the drain hole 4, it will fall on the second inclined surface 200 of the second slope unit 20. The second inclined surface 200 can direct the rainwater to the low point of the second slope unit 20, so that the drainage member located at the low point of the second slope unit 20 can drain the rainwater.
[0044] Specifically, the drainage member can adopt a water guide pipe, and the water guide pipe is arranged at a preset slope. Its water inlet is communicated with the sandwich cavity 3, and the water outlet can be arranged on the ground, or connected to a trench on the ground or underground. In actual operation, after the rainwater enters the sandwich cavity 3 through the drain hole 4, under the guidance of the second inclined surface 200, it flows to the low point of the second slope unit 20. Since the water guide pipe is arranged at a preset slope, under the action of gravity, the rainwater flows into the water guide pipe from the water inlet and is discharged from the water outlet of the water guide pipe to the ground or the trench on the ground and underground, effectively avoiding the erosion of the building by the rainwater.
[0045] It can be understood that the drainage member includes but is not limited to the above structures or forms, and other structures or forms of drainage members are equally applicable as long as they can drain the rainwater in the sandwich cavity 3.
[0046] In some embodiments, the first slope unit 10 composed of the first inclined surface 100 and the second slope unit 20 composed of the second inclined surface 200 have various optional shapes and structures, and can be specifically designed flexibly according to actual needs.
[0047] In a specific embodiment of the present utility model, referring to Figure 3 and Figure 4 , the first slope unit 10 includes a plurality of first inclined surfaces 100. The plurality of first inclined surfaces 100 are sequentially spliced so that the first slope unit 10 presents a trough-shaped structure with a polygonal cross-section. Specifically, the cross-section of the above trough-shaped structure tapers from the upper top 1 to the lower top 2. Correspondingly, the second slope unit 20 includes a plurality of second inclined surfaces 200. The plurality of second inclined surfaces 200 are sequentially spliced so that the second slope unit 20 presents a boss-shaped structure with a polygonal cross-section. Specifically, the cross-section of the above boss-shaped structure expands from the upper top 1 to the lower top 2.
[0048] In a specific embodiment of the present utility model, the first slope unit 10 includes four first inclined surfaces 100. The four first inclined surfaces 100 are sequentially spliced so that the first slope unit 10 presents a trough-shaped structure with a square cross-section. Correspondingly, the second slope unit 20 includes four second inclined surfaces 200. The four second inclined surfaces 200 are sequentially spliced so that the second slope unit 20 presents a boss-shaped structure with a square cross-section. The low point of the first slope unit 10 corresponds to the high point position of the second slope unit 20.
[0049] In actual work, rainwater flows along the first inclined surface 100 to the bottom of the first slope unit 10, then flows into the sandwich cavity 3 through the drain hole 4, and then flows along the second inclined surface 200 to the low point of the second slope unit 20, and finally is discharged through the water guide pipe.
[0050] It can be understood that the first slope unit 10 and the second slope unit 20 include but are not limited to the shapes listed above. In addition, the specific shapes of the first slope unit 10 and the second slope unit 20 are not necessarily the same. Other shapes of the first slope unit 10 and the second slope unit 20 are also applicable as long as they can achieve the corresponding water guiding and draining effects.
[0051] A plurality of first slope units 10 with the above structures are arranged on the upper top 1 in a preset manner, and a plurality of second slope units 20 with the above structures are arranged on the lower top 2 in a preset manner. The specific arrangement manners of the first slope unit 10 and the second slope unit 20 can be designed according to actual requirements. For example, they can be arranged in a regular or irregular manner and can cover part or all of the upper top 1 and the lower top 2.
[0052] In this embodiment, multiple first ramp units 10 of the above structure are arranged in a matrix on the upper top 1, and adjacent first ramp units 10 are joined together so that multiple first ramp units 10 cover the entire upper top 1; correspondingly, multiple second ramp units 20 of the above structure are arranged in a matrix on the lower top 2, and adjacent second ramp units 20 are joined together so that multiple second ramp units 20 cover the entire lower top 2.
[0053] To support the upper top 1, the double-layer roof system further includes a support beam 5 disposed in the sandwich cavity 3. The bottom of the support beam 5 is connected to the lower top 2, and the top is connected to the upper top 1. With this arrangement, huge concrete support members can be hidden in the sandwich cavity 3, ensuring the integrity of the indoor space.
[0054] Specifically, referring to Figure 5 , the support beam 5 includes a plurality of cross beams 50 and longitudinal beams 51 arranged in a grid structure; the first ramp units 10, the second ramp units 20, and the space areas formed by the cross beams 50 and longitudinal beams 51 are arranged in one-to-one correspondence. The above-mentioned sandwich cavity 3 is jointly enclosed by the first inclined surface 100 of the first ramp unit 10, the second inclined surface 200 of the second ramp unit 20, and the cross beams 50 and longitudinal beams 51 of the support beam 5. The water conduit is arranged in the support beam 5.
[0055] In actual operation, rainwater flows along the first inclined surface 100 to the bottom of the first ramp unit 10, then flows into the sandwich cavity 3 through the drain hole 4, then flows along the second inclined surface 200 to the bottom of the second ramp unit 20, and finally is discharged through the water conduit in the support beam 5.
[0056] In a specific embodiment of the present utility model, referring to Figure 2 , the double-layer roof system further includes a skylight 6 disposed between the low point of the first ramp unit 10 and the high point of the second ramp unit 20 to facilitate natural ventilation between the indoor and outdoor. The window surface of the skylight 6 is inclined from the middle to the periphery in a direction gradually approaching the lower top 2, forming the low point of the skylight 6. The position of the drain hole 4 corresponds to the position of the low point of the skylight 6. With this arrangement, the rainwater guided by the first inclined surface 100 and falling on the skylight 6 or the rainwater naturally falling on the skylight 6 flows towards the low point of the skylight 6 under the guidance of the window surface and enters the sandwich cavity 3 through the drain hole 4, effectively avoiding the problem of water accumulation on the skylight 6.
[0057] It can be understood that the roof system includes but is not limited to the structures or components listed above. To achieve the functions of the roof system, it may further include other structures or components, such as insulation layers, various pipelines, etc. Specifically, reference can be made to existing roof designs. Since the other structures or components of the roof system are not the main improvement points of the present utility model, they will not be listed and described one by one.
[0058] It should be noted that, without contradiction, those skilled in the art can combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples.
[0059] The building provided by the present utility model will be described below. The building described below can be correspondingly referred to the two-way long-span reinforced concrete solid web beam structure double-layer roof system described above.
[0060] Refer to Figure 1 and Figure 6 , a building, comprising a building main body 7 and a two-way long-span reinforced concrete solid web beam structure double-layer roof system as provided in any of the above embodiments covering the top of the building main body 7.
[0061] Specifically, the building main body 7 includes a retaining wall and structural columns on the ground for connecting the two-way long-span reinforced concrete solid web beam structure double-layer roof system. The retaining wall and structural columns can not only provide support for the double-layer roof system, but also jointly enclose the indoor area of the building with the double-layer roof system.
[0062] Specifically, the building main body 7 further includes an outer corridor. The structural columns of the outer corridor are arranged in a plate shape. The structural columns of the building main body 7 are located outdoors and are arranged in a plate shape. The structural columns of the building main body 7 and the structural columns of the outer corridor jointly form a colonnade. With such an arrangement, the structural columns of the building main body 7 and the structural columns of the outer corridor jointly provide support for the building main body 7, realizing no columns indoors and ensuring the integrity of the indoor space. In addition, the structural columns and the structural columns are combined to form a colonnade, realizing the concealment of huge concrete structural members.
[0063] Through the two-way long-span reinforced concrete solid web beam structure double-layer roof system and the building provided by the embodiments of the present utility model, the above double-layer roof system is applied to the building. The upper roof 1 serves as the outer roof of the building, and the lower roof 2 serves as the inner roof of the building. When it rains, the first inclined surface 100 can guide the rainwater to the low point of the first slope unit 10, and then the rainwater is introduced into the sandwich cavity 3 through the drain hole 4 near the low point of the first slope unit 10. The drainage member located in the sandwich cavity 3 can drain the rainwater entering the sandwich cavity 3; since a plurality of first slope units 10 and the corresponding sandwich cavities 3 and drainage members are provided on the double-layer roof system, the rainwater on the roof can be drained comprehensively and efficiently, effectively solving the problems of difficult drainage and low efficiency of the large-span building roof in the related art; in addition, the drainage member is located in the sandwich cavity 3 and does not occupy the indoor and outdoor spaces of the building, which is beneficial to ensuring the integrity of the indoor and outdoor spaces and improving the utilization rate of the indoor and outdoor spaces.
[0064] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims
1. A double-layer roof system with a bidirectional large-span reinforced concrete solid beam structure, characterized in that: include: The upper roof (1) and the lower roof (2); A plurality of interlayer cavities (3) are formed between the upper roof (1) and the lower roof (2); A plurality of first slope units (10) corresponding to the interlayer cavity (3) are arranged on the upper layer roof (1), the first slope unit (10) comprising a first slope (100), one side of the first slope (100) being inclined in a direction gradually approaching the lower layer roof (2), so that the first slope unit (10) forms a low point; The upper roof (1) is provided with a drainage hole (4) close to the lowest point of the first slope unit (10), and the drainage hole (4) is connected to the interlayer cavity (3); a drainage component is provided in the interlayer cavity (3) for draining rainwater entering the interlayer cavity (3).
2. The bidirectional large-span reinforced concrete solid beam structure double-layer roof system according to claim 1 is characterized in that: A plurality of second slope units (20) corresponding to the interlayer cavity (3) are arranged on the lower layer top (2), the second slope unit (20) comprising a second slope (200), and the drainage hole (4) corresponds to the second slope (200); One side of the second slope (200) is inclined in a direction gradually away from the upper layer top (1), so that the second slope unit (20) forms a low point, and the drainage component is arranged at the low point of the second slope unit (20).
3. The bidirectional large-span reinforced concrete solid beam structure double-layer roof system according to claim 2 is characterized in that: The first slope unit (10) comprises a plurality of the first slopes (100), and the plurality of the first slopes (100) are sequentially spliced so that the first slope unit (10) presents a groove-shaped structure with a polygonal cross-section; the plurality of the first slope units (10) are arranged in an array and cover the entire upper roof (1).
4. The bidirectional large-span reinforced concrete solid beam structure double-layer roof system according to claim 3 is characterized in that: The second slope unit (20) comprises a plurality of the second slopes (200), and the plurality of the second slopes (200) are sequentially spliced so that the second slope unit (20) presents a boss structure with a polygonal cross section; A plurality of the second slope units (20) are arranged in an array and cover the entire lower roof (2); the low point of the first slope unit (10) corresponds to the high point of the second slope unit (20).
5. The bidirectional large-span reinforced concrete solid beam structure double-layer roof system according to claim 4 is characterized in that: It also includes a skylight (6) arranged between the low point of the first slope unit (10) and the high point of the second slope unit (20); The window surface of the skylight (6) is inclined from the middle to the surrounding areas in a direction gradually approaching the lower roof (2), forming the lowest point of the skylight (6), and the position of the drainage hole (4) corresponds to the lowest point of the skylight (6).
6. The bidirectional large-span reinforced concrete solid beam structure double-layer roof system according to claim 1 is characterized in that: The drainage component includes a water pipe, and the water pipe is arranged with a preset slope.
7. The bidirectional large-span reinforced concrete solid beam structure double-layer roof system according to any one of claims 2 to 5, characterized in that: It also includes a support beam (5) arranged in the interlayer cavity (3) for supporting the upper roof (1).
8. The bidirectional large-span reinforced concrete solid beam structure double-layer roof system according to claim 7 is characterized in that: The support beam (5) comprises a plurality of cross beams (50) and longitudinal beams (51) arranged crosswise in a grid structure; The first slope unit (10), the second slope unit (20), and the space area formed by the cross beam (50) and the longitudinal beam (51) are arranged in a one-to-one correspondence.
9. The bidirectional large-span reinforced concrete solid beam structure double-layer roof system according to claim 7 is characterized in that: The drainage member is arranged inside the support beam (5).
10. A building, characterized in that: It comprises a building body (7) and a double-layer roofing system of a bidirectional large-span reinforced concrete solid beam structure as described in any one of claims 1 to 9 covering the top of the building body (7).