Design and construction method of a decorative integrated downpipe structure

Abstract

The application provides a design and construction method of a decorative integrated downpipe structure, which comprises the following steps: establishing a building model by using a curved roof modeling software, finding points of a special-shaped curved roof, and determining the elevation thereof; decomposing the building model into coordinate points by using a decomposed curved model software; connecting the coordinate points to form geometric lines by using a geometric modeling software, establishing a three-dimensional model, and preliminarily selecting the positions of eaves gutters and downpipes; giving sizes and physical properties to the geometric lines and performing collision analysis by using a physical model component analysis software, and optimizing the positions of the downpipes; reasonably planning a curved roof drainage scheme, optimizing the positions of the downpipes, guiding construction slope finding, improving the design and construction efficiency, and ensuring the normal operation of the drainage system. The downpipe is fixed by a light steel frame, is more stable, and is protected by a decorative shell which is arranged on the outer sides of the two light steel frames, so that the downpipe can be hidden and the building appearance can be beautified.

Description

Technical Field

[0001] This invention belongs to the field of civil engineering construction, and specifically relates to a design and construction method for an integrated decorative downpipe structure. Background Technology

[0002] Traditional downpipes are usually fixed with clips during installation, leaving the bottom of the downpipe suspended in the air. This method has many drawbacks, the effect is not ideal, it is easy to be damaged, and the connection with clips is not secure, which not only affects normal use, but also affects the appearance of the building.

[0003] Therefore, how to provide a convenient, fast, and high-quality integrated decorative downpipe structure and method that improves the appearance of buildings while achieving the desired drainage effect has become a technical problem that the construction industry needs to further improve and optimize. Summary of the Invention

[0004] The present invention aims to develop a design and construction method for an integrated decorative downpipe structure. This method is convenient to construct and the downpipe is stably installed. While improving the appearance of the building, it achieves the desired drainage effect and solves the problem that existing downpipes are exposed to the outside, easily damaged, and affect normal use.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution:

[0006] A design and construction method for an integrated decorative downpipe structure includes the following steps:

[0007] Step 1: Using curved roof modeling software, create an architectural model, locate points on the irregular curved roof, and determine its elevation.

[0008] Step 2: Decompose the building model into coordinate points using surface decomposition software;

[0009] Step 3: Using geometric modeling software, connect the coordinate points to form geometric lines, establish the three-dimensional model, and initially select the locations of the eaves gutter and downpipe;

[0010] Step 4: Using physical model component analysis software, assign dimensions and physical properties to the geometric lines and perform collision analysis to optimize the location of the downpipe;

[0011] Step 5: Connect the two curtain wall glass mounting components using the first connector, and connect the two curtain wall glass mounting components to the main structure using the second connector. The outer surfaces of the two curtain wall glass mounting components are respectively provided with mounting grooves for installing the curtain wall glass. Each of the two curtain wall glass mounting components is provided with a light steel keel frame. The downpipe is placed between the two light steel keel frames. The decorative shell is fixedly fitted on the outside of the two light steel keel frames, and the downpipe is located within the space enclosed by the two light steel keel frames, the decorative shell, and the first connector. The downpipe is connected to one or both of the two light steel keel frames.

[0012] Preferably, in the above-mentioned design and construction method of the integrated decorative downpipe structure, the second connector includes two connecting plates, and fireproof rock wool is provided in the space enclosed by the two connecting plates and the first connector.

[0013] Preferably, in the above-mentioned design and construction method of the integrated decorative downpipe structure, the light steel keel frame and the decorative shell are connected by a connecting structure. The connecting structure includes a U-shaped plate, self-tapping screws, two screws, two nuts, a cylindrical sealing waterstop strip, and sealant. The bottom plate of the U-shaped plate has a through hole for the self-tapping screws to pass through. The decorative shell has an opening with an inwardly bent flange. The side plates and flanges of the U-shaped plate have corresponding through holes for the screws to pass through. The cylindrical sealing waterstop strip is placed between the two flanges. The two screws pass through the through holes of the corresponding flanges and the through holes of the corresponding side plates of the U-shaped plate in sequence and are then tightened by nuts. The axes of the two screws are collinear. The axis of the cylindrical sealing waterstop strip is located between the axes of the two screws and the bottom plate of the U-shaped plate. The sealant seals the groove formed by the two flanges and the cylindrical sealing waterstop strip.

[0014] Preferably, in the above-mentioned design and construction method of the integrated decorative downpipe structure, the first connector includes a horizontal tie member and a baffle. The horizontal tie member connects the ends of the two curtain wall glass installation members that are close to the main structure. The two ends of the baffle are respectively fixed to the ends of the two curtain wall glass installation members that are away from the main structure. Fireproof rock wool is provided in the space enclosed by the horizontal tie member, the baffle and the two curtain wall glass installation members.

[0015] Preferably, in the above-mentioned design and construction method of the integrated decorative downpipe structure, the installation groove is a hot-dip galvanized U-shaped groove.

[0016] Preferably, in the above-mentioned design and construction method of the integrated decorative downpipe structure, the two curtain wall glass installation components, the downpipe and the decorative shell are all vertically continuous.

[0017] Preferably, in the above-mentioned design and construction method of the integrated decorative downpipe structure, when the top elevation of the concrete base slab is lower than the outdoor ground elevation, the downpipe is buried in the soil for drainage.

[0018] Preferably, in the above-mentioned design and construction method of the integrated decorative downpipe structure, when the top elevation of the concrete base slab is higher than or equal to the outdoor ground elevation, a rainwater pipe trench is opened, and the downpipe drains through the rainwater pipe trench.

[0019] Preferably, in the above-mentioned design and construction method of the integrated decorative downpipe structure, the downpipe, two light steel keel frames and decorative shell are pre-assembled in the factory, so that they are assembled as a whole prefabricated component and installed directly on site.

[0020] As can be seen from the above-disclosed technical solutions, the beneficial effects of the present invention compared with the prior art are as follows:

[0021] This invention provides a design and construction method for an integrated decorative downpipe structure. Using curved roof modeling software, a building model is created to locate points on the irregular curved roof and determine its elevation. The model is then decomposed into coordinate points using surface model decomposition software. Geometric modeling software connects these coordinate points to form geometric lines, establishing a three-dimensional model and initially selecting the locations of eaves gutters and downpipes. Physical model component analysis software assigns dimensions and physical properties to the geometric lines and performs collision analysis to optimize the downpipe positions. Thus, by designing the curved roof using information technology, a reasonable drainage scheme can be planned, downpipe positions optimized, and slope selection guided during construction, improving design and construction efficiency and ensuring the normal operation of the drainage system. Furthermore, fixing the downpipes with a light steel keel frame is more robust than traditional fixing methods. By fitting the decorative shell onto the outside of the two light steel keel frames, the downpipes are not only concealed and the building's appearance beautified, but the downpipes are also protected from exposure and damage. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of a decorative integrated downpipe structure according to the present invention.

[0023] Figure 2 This is a schematic diagram of the arrangement of downpipes when the concrete base slab is a drop slab in this invention.

[0024] Figure 3 This is a schematic diagram of the arrangement of downpipes when the concrete base slab is not a drop slab in this invention.

[0025] Figure 4 This is a schematic diagram showing the connection between the light steel keel frame and the decorative shell.

[0026] In the diagram: 1-downpipe, 2-light steel keel frame, 3-decorative shell, 31-flanged edge, 4-connecting plate, 5-horizontal tie rod, 6-baffle, 7-curtain wall glass installation component, 8-main structure, 9-fireproof rock wool, 10-curtain wall glass, 11-installation groove, 12-connecting structure, 121-U-shaped plate, 122-self-tapping screw, 123-screw, 124-nut, 125-cylindrical sealing waterstop strip, 126-sealant, 13-downpipe fixing component, 14-decorative light strip, 15-interior decoration, 16-rainwater pipe trench, 17-eaves gutter. Detailed Implementation

[0027] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. The technical content and features of the present invention will be described in detail below with reference to the listed embodiments and the accompanying drawings. It should be noted that the drawings are all in a very simplified form and use non-precise proportions, and are only used to facilitate and clarify the illustration of the embodiments of the present invention. For ease of description, the terms "upper" and "lower" used below are consistent with the upper and lower directions in the accompanying drawings, but this should not be construed as a limitation of the technical solution of the present invention.

[0028] Please see Figures 1 to 4 This embodiment discloses an integrated decorative downpipe structure, including: a downpipe 1, two light steel keel frames 2, a decorative shell 3, a first connector, a second connector, and two curtain wall glass mounting components 7. The two curtain wall glass mounting components 7 are connected by the first connector, and the two curtain wall glass mounting components 7 are connected to the main structure 8 by the second connector. In this embodiment, the main structure 8 is a column. The outer surfaces of the two curtain wall glass mounting components 7 are respectively provided with mounting grooves 11 for installing curtain wall glass 10. Each of the two curtain wall glass mounting components 7 is provided with a light steel keel frame 2. The downpipe 1 is disposed between the two light steel keel frames 2. The decorative shell 3 is fixedly sleeved on the outside of the two light steel keel frames 2, and the downpipe 1 is located within the space enclosed by the two light steel keel frames 2, the decorative shell 3, and the first connector. The downpipe 1 is connected to one or both of the two light steel keel frames 2.

[0029] This invention provides an integrated decorative downpipe structure, comprising a downpipe 1, two light steel keel frames 2, a decorative shell 3, a first connector, a second connector, and two curtain wall glass mounting components 7. The two curtain wall glass mounting components 7 are connected by the first connector and connected to the main structure 8 by the second connector. The outer surfaces of the two curtain wall glass mounting components 7 are respectively provided with mounting grooves 11 for installing curtain wall glass 10. Each of the two curtain wall glass mounting components 7 is provided with one of the aforementioned light steel keel frames 2. The downpipe 1 is disposed between the two aforementioned light steel keel frames 2. The decorative shell 3 is fixedly sleeved on the outer side of the two light steel keel frames 2, and the downpipe 1 is located within the space enclosed by the two light steel keel frames 2, the decorative shell 3, and the first connector. The downpipe 1 is connected to one or both of the two light steel keel frames 2. The downpipe 1 is fixed by the light steel keel frame 2, which is more secure than the traditional fixing method. By fitting the decorative shell 3 on the outside of the two light steel keel frames 2, not only can the downpipe 1 be hidden and the building appearance beautified, but the downpipe 1 can also be protected and prevent it from being exposed and damaged.

[0030] Preferably, in the above-mentioned integrated decorative downpipe structure, the second connector includes two connecting plates 4, and fireproof rock wool 9 is provided in the space enclosed by the two connecting plates 4 and the first connector to play a fireproof role.

[0031] Preferably, in the above-mentioned integrated decorative downpipe structure, the light steel keel frame 2 and the decorative shell 3 are connected by a connecting structure 12. The connecting structure 12 includes a U-shaped plate 121, self-tapping screws 122, two screws 123, two nuts 124, a cylindrical sealing waterstop strip 125, and sealant 126. The U-shaped plate is a U-shaped structure formed by connecting a bottom plate and two side plates. The bottom plate of the U-shaped plate 121 is provided with a through hole for the self-tapping screws 122 to pass through. The decorative shell 3 is open, and the opening of the decorative shell 3 has an inwardly bent flange 31. The side plates of the U-shaped plate 121 and the flange 31 are correspondingly provided for the screws 123 to pass through. The cylindrical sealing waterstop strip 125 is set between the two flanges 31. The two screws pass through the through holes of the corresponding flanges 31 and the through holes on the corresponding side plates of the U-shaped plate 121 in sequence and are then tightened by nuts 124. The axis lines of the two screws 123 are collinear. The axis line of the cylindrical sealing waterstop strip 123 is located between the axis lines of the two screws 123 and the bottom plate of the U-shaped plate 121. The sealant 126 is sealed in the groove formed by the two flanges 31 and the cylindrical sealing waterstop strip 125, so that it can not only play a role in waterproofing and beautification, but also seal the self-tapping screws to prevent them from falling off, and realize a reliable connection between the decorative shell 3 and the light steel keel frame 2.

[0032] Preferably, in the above-mentioned integrated decorative downpipe structure, the first connector includes a horizontal tie member 5 and a baffle 6. The horizontal tie member 5 connects the ends of the two curtain wall glass mounting pieces 7 near the main structure 8, and the two ends of the baffle 6 are respectively fixed to the ends of the two curtain wall glass mounting pieces 7 away from the main structure 8. Fireproof rock wool 9 is provided in the space enclosed by the horizontal tie member 5, the baffle 6, and the two curtain wall glass mounting pieces 7. By connecting the two curtain wall glass mounting pieces 7 with the horizontal tie member 5, the stability of the curtain wall glass mounting pieces 7 is improved, thereby improving the stability of the curtain wall glass 10.

[0033] Preferably, in the above-mentioned integrated decorative downpipe structure, the mounting groove 11 is a hot-dip galvanized U-shaped groove, so as to achieve a sealed and secure connection between the curtain wall glass mounting component 7 and the curtain wall glass 10.

[0034] Preferably, in the above-mentioned integrated decorative downpipe structure, the two curtain wall glass mounting parts 7, the downpipe 1, and the decorative shell 3 are all vertically continuous.

[0035] Preferably, in the above-mentioned integrated decorative downpipe structure, if the top elevation of the concrete base slab is lower than the outdoor ground elevation, that is, when the concrete base slab is a drop slab, the downpipe 1 is buried in the soil for drainage.

[0036] Preferably, in the above-mentioned integrated decorative downpipe structure, if the top elevation of the concrete base slab is higher than or equal to the outdoor ground elevation, that is, if the concrete base slab is not a drop slab, a rainwater pipe trench 16 is opened, and the downpipe 1 drains water through the rainwater pipe trench 16.

[0037] Preferably, in the above-mentioned integrated decorative downpipe structure, the two sides of the downpipe 1 are respectively connected to the adjacent light steel keel frame 2 through a downpipe fixing member 13, so that the forces on both sides of the downpipe 1 are consistent and the stability of the downpipe 1 is improved.

[0038] Preferably, in the above-mentioned integrated decorative downpipe structure, the inner side of the decorative shell 3 is provided with a decorative light strip 14, and the outer side of the connecting plate 4 and the outer side of the main structure are provided with interior decoration 15.

[0039] Preferably, in the above-mentioned integrated decorative downpipe structure, the downpipe 1, the two light steel keel frames 2, and the decorative shell 3 are pre-assembled in the factory so that they can be installed directly on site as a whole prefabricated component.

[0040] Please see Figures 1 to 4 This embodiment discloses a design and construction method for an integrated decorative downpipe structure, including the following steps:

[0041] Step 1: Using curved roof modeling software, create an architectural model, locate points on the irregular curved roof, and determine its elevation. In this embodiment, Sketch software is used to create the architectural model, locate points on the irregular curved roof, and determine its elevation.

[0042] Step 2: Decompose the building model into coordinate points using surface model decomposition software. In this embodiment, Rhino software is used to decompose the building model into coordinate points.

[0043] Step 3: Using geometric modeling software, connect the coordinate points to form geometric lines, establish the three-dimensional model, and initially select the positions of the eaves gutter 17 and the downpipe 1. In this embodiment, CAD software is used to connect the coordinate points to form geometric lines, establish the three-dimensional model, and initially select the positions of the eaves gutter 17 and the downpipe 1.

[0044] Step 4: Using physical model component analysis software, dimensions and physical properties are assigned to the geometric lines, and collision analysis is performed to optimize the position of downpipe 1. In this example, BIM is used to assign dimensions and physical properties to the geometric lines and perform collision analysis to optimize the position of downpipe 1.

[0045] Step 5: Connect the two curtain wall glass mounting components 7 with the first connector, and connect the two curtain wall glass mounting components 7 with the main structure 8 with the second connector. The outer sides of the two curtain wall glass mounting components 7 are respectively provided with mounting grooves 11 for installing curtain wall glass 10. A light steel keel frame 2 is provided on each of the two curtain wall glass mounting components 7. The downpipe 1 is set between the two light steel keel frames 2. The decorative shell 3 is fixedly sleeved on the outside of the two light steel keel frames 2, and the downpipe 1 is located in the space enclosed by the two light steel keel frames 2, the decorative shell 3 and the first connector. The downpipe 1 is connected to one or both of the two light steel keel frames 2.

[0046] This invention provides a design and construction method for an integrated decorative downpipe structure. Using curved roof modeling software, a building model is created, points are located on the irregular curved roof, and its elevation is determined. Using decomposition modeling software, the building model is decomposed into coordinate points. Using geometric modeling software, the coordinate points are connected to form geometric lines, establishing a three-dimensional model and initially selecting the positions of the eaves gutter and downpipe 1. Using physical model component analysis software, dimensions and physical properties are assigned to the geometric lines, and collision analysis is performed to optimize the position of downpipe 1. Thus, by designing the curved roof using information technology, the drainage scheme of the curved roof can be rationally planned, the position of downpipe 1 optimized, and the slope finding guided during construction can be improved, increasing the efficiency of design and construction and ensuring the normal operation of the drainage system. Furthermore, fixing the downpipe 1 with a light steel keel frame 2 is more secure than traditional fixing methods. By fitting a decorative shell 3 onto the outside of the two light steel keel frames 2, not only can the downpipe 1 be concealed and the building's appearance beautified, but the downpipe 1 can also be protected, preventing exposure and damage.

[0047] Preferably, in the above-mentioned design and construction method of the integrated decorative downpipe structure, the second connector includes two connecting plates 4, and fireproof rock wool 9 is provided in the space enclosed by the two connecting plates 4 and the first connector to play a fireproof role.

[0048] Preferably, in the above-described design and construction method of the integrated decorative downpipe structure, the first connector includes a transverse tie member 5 and a baffle 6. The transverse tie member 5 connects the ends of the two curtain wall glass mounting pieces 7 near the main structure 8, and the two ends of the baffle 6 are respectively fixed to the ends of the two curtain wall glass mounting pieces 7 away from the main structure 8. Fireproof rock wool 9 is provided in the space enclosed by the transverse tie member 5, the baffle 6, and the two curtain wall glass mounting pieces 7. By connecting the two curtain wall glass mounting pieces 7 with the transverse tie member 5, the stability of the curtain wall glass mounting pieces 7 is improved, thereby improving the stability of the curtain wall glass 10.

[0049] Preferably, in the above-mentioned design and construction method of the integrated decorative downpipe structure, the light steel keel frame 2 and the decorative shell 3 are connected by a connecting structure. The connecting structure includes a U-shaped plate 121, self-tapping screws 122, two screws 123, two nuts 124, a cylindrical sealing waterstop strip 125, and sealant 126. The U-shaped plate 121 is a U-shaped structure formed by connecting a bottom plate and two side plates. The bottom plate of the U-shaped plate 121 is provided with a through hole for the self-tapping screws 122 to pass through. The decorative shell 3 is open, and the opening of the decorative shell 3 has an inwardly bent flange 31. The side plates and flange 31 of the U-shaped plate 121 are correspondingly provided with screws 123. The cylindrical sealing waterstop strip 125 is positioned between the two flanges 31 through the through hole. Two screws pass through the through holes of the corresponding flanges 31 and the corresponding side plates of the U-shaped plate 121 in sequence and are then tightened by nuts 124. The axes of the two screws 123 are collinear. The axis of the cylindrical sealing waterstop strip 123 is located between the axis of the two screws 123 and the bottom plate of the U-shaped plate 121. The sealant 126 is sealed in the groove formed by the two flanges 31 and the cylindrical sealing waterstop strip 125, which not only serves the functions of waterproofing and aesthetics, but also seals the self-tapping screws 122 to prevent them from falling off, thus achieving a reliable connection between the decorative shell 3 and the light steel keel frame 2.

[0050] Preferably, in the above-mentioned design and construction method of the integrated decorative downpipe structure, the installation groove 11 adopts a hot-dip galvanized U-shaped groove to facilitate the sealing and firm connection between the curtain wall glass installation component 7 and the curtain wall glass 10.

[0051] Preferably, in the above-mentioned design and construction method of the integrated decorative downpipe structure, the two curtain wall glass installation components 7, the downpipe 1, and the decorative shell 3 are all vertically continuous.

[0052] Preferably, in the above-mentioned design and construction method of the integrated decorative downpipe structure, when the top elevation of the concrete base slab is lower than the outdoor ground elevation, that is, when the concrete base slab is a drop slab, the downpipe 1 is buried in the soil for drainage.

[0053] Preferably, in the above-mentioned design and construction method of the integrated decorative downpipe structure, when the top elevation of the concrete base slab is higher than or equal to the outdoor ground elevation, that is, when the concrete base slab is not a drop slab, a rainwater pipe trench 16 is opened, and the downpipe 1 drains through the rainwater pipe trench 16.

[0054] Preferably, in the above-mentioned design and construction method of the decorative integrated downpipe structure, the two sides of the downpipe 1 are respectively connected to the adjacent light steel keel frame 2 through a downpipe fixing component 13, so that the forces on both sides of the downpipe 1 are consistent and the stability of the downpipe 1 is improved.

[0055] Preferably, in the above-mentioned design and construction method of the integrated decorative downpipe structure, the inner side of the decorative shell 3 is provided with a decorative light strip 14, and the outer side of the connecting plate 4 and the outer side of the main structure are provided with interior decoration 15.

[0056] Preferably, in the above-mentioned design and construction method of the integrated decorative downpipe structure, the downpipe 1, the two light steel keel frames 2 and the decorative shell 3 are pre-assembled in the factory so that they can be installed directly on site as an integral prefabricated component.

[0057] The above description is merely a description of preferred embodiments of the present invention and is not intended to limit the scope of the present invention in any way. Any changes or modifications made by those skilled in the art based on the above disclosure shall fall within the protection scope of the claims.

Claims

1. A design and construction method for an integrated decorative downpipe structure, characterized in that, Includes the following steps: Step 1: Using curved roof modeling software, create an architectural model, locate points on the irregular curved roof, and determine its elevation. Step 2: Decompose the building model into coordinate points using surface decomposition software; Step 3: Using geometric modeling software, connect the coordinate points to form geometric lines, establish the three-dimensional model, and initially select the locations of the eaves gutter and downpipe; Step 4: Using physical model component analysis software, assign dimensions and physical properties to the geometric lines and perform collision analysis to optimize the location of the downpipe; Step 5: Connect the two curtain wall glass mounting components using the first connector, and then connect them to the main structure using the second connector. Each of the two curtain wall glass mounting components has a mounting groove on its outer surface for installing the glass. Each of the two curtain wall glass mounting components has a light steel keel frame. A downpipe is positioned between the two light steel keel frames. The decorative shell is fixedly fitted onto the outside of the two light steel keel frames, and the downpipe is located within the space enclosed by the two light steel keel frames, the decorative shell, and the first connector. The downpipe is connected to one or both of the two light steel keel frames. The second connector includes two connecting plates. Fireproof rock wool is installed within the space enclosed by the two connecting plates and the first connector. The first connector includes a horizontal tie and a baffle. The horizontal tie connects the ends of the two curtain wall glass mounting components near the main structure. The two ends of the baffle are fixed to the ends of the two curtain wall glass mounting components away from the main structure. Fireproof rock wool is installed within the space enclosed by the horizontal tie, the baffle, and the two curtain wall glass mounting components. The two curtain wall glass installation components, downpipes, and decorative shells are all vertically continuous. The downpipes, two light steel keel frames, and decorative shells are pre-assembled in the factory as a complete prefabricated component, ready for direct installation on site. The light steel keel frames and decorative shells are connected by a connecting structure, which includes a U-shaped plate, self-tapping screws, two screws, two nuts, a cylindrical sealing waterstop strip, and sealant. The bottom plate of the U-shaped plate has through holes for the self-tapping screws to pass through, and the decorative shell has an opening. The decorative shell has an inwardly bent flange at its opening. The side plate and flange of the U-shaped plate have corresponding through holes for screws to pass through. The cylindrical sealing waterstop strip is set between the two flanges. The two screws pass through the through holes of the corresponding flanges and the corresponding through holes of the side plate of the U-shaped plate in sequence and are then tightened by nuts. The axis lines of the two screws are collinear. The axis line of the cylindrical sealing waterstop strip is located between the axis lines of the two screws and the bottom plate of the U-shaped plate. The sealant is used to seal the groove formed by the two flanges and the cylindrical sealing waterstop strip.

2. The design and construction method of the integrated decorative downpipe structure as described in claim 1, characterized in that, The mounting groove is a hot-dip galvanized U-shaped groove.

3. The design and construction method of the integrated decorative downpipe structure as described in claim 1, characterized in that, When the top elevation of the concrete base slab is lower than the outdoor ground elevation, the downpipe is buried in the soil for drainage.

4. The design and construction method of the integrated decorative downpipe structure as described in claim 1, characterized in that, When the top elevation of the concrete base slab is higher than or equal to the outdoor ground elevation, a rainwater drainage ditch is constructed, and the downpipe drains through the rainwater drainage ditch.

Images