A sports stadium drainage maintenance structure above a basement roof

Abstract

This utility model relates to a drainage and maintenance structure for a stadium above a basement roof slab, comprising a maintenance water supply pipe, sprinkler heads, drainage blind pipes, and a gravel drainage layer. The maintenance water supply pipe, drainage blind pipes, and gravel drainage layer are all buried in the soil layer between the basement roof slab and the stadium turf. Both ends of the drainage blind pipes are connected to the stadium's drainage ditch, and the upper half of the drainage blind pipe has permeable holes. The gravel drainage layer surrounds the drainage blind pipes, and the maintenance water supply pipes are spaced above the gravel drainage layer and connected to sprinkler heads located on the surface of the stadium turf. This utility model, by setting drainage blind pipes and a gravel drainage layer in the soil layer of the stadium turf, can avoid problems such as water accumulation on the stadium turf. The drainage and maintenance structure of this utility model, composed of water supply and drainage components, improves the standardization of stadium turf maintenance, allowing for controlled maintenance at regular intervals and the dissipation and drainage of excess water.

Description

Technical Field

[0001] This utility model relates to the technical field of football field maintenance, specifically to a drainage maintenance structure for a stadium above a basement roof. Background Technology

[0002] Existing stadiums have large maintenance areas, are difficult to maintain, take a long time to maintain, require a lot of manpower, and are prone to problems such as water accumulation and depressions. Utility Model Content

[0003] In order to solve one or more technical problems existing in the prior art, this utility model provides a drainage and maintenance structure for a stadium above a basement roof.

[0004] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: This utility model provides a drainage and maintenance structure for a stadium above a basement roof, including a maintenance water supply pipe, a sprinkler head, a drainage blind pipe, and a gravel drainage layer. The maintenance water supply pipe, the drainage blind pipe, and the gravel drainage layer are all buried in the soil layer between the basement roof and the stadium lawn. The two ends of the drainage blind pipe are respectively connected to the drainage ditch of the stadium. The upper half of the drainage blind pipe is provided with water permeable holes. The gravel drainage layer is wrapped around the drainage blind pipe. The maintenance water supply pipe is arranged at intervals above the gravel drainage layer and is connected to the sprinkler head located on the surface of the stadium lawn.

[0005] The beneficial effects of this utility model are as follows: This utility model provides a drainage and maintenance structure for a stadium above a basement roof. By installing drainage blind pipes and a gravel drainage layer within the soil layer of the stadium lawn, it can prevent water accumulation and other problems associated with the lawn. This drainage and maintenance structure consists of two parts: water supply and drainage. It improves the standardization of stadium lawn maintenance, allowing for controlled maintenance at regular intervals and effectively dissipating excess water.

[0006] Based on the above technical solution, the present invention can be further improved as follows.

[0007] Furthermore, the upper half of the hydrophobic blind pipe is a permeable pipe with a mesh-like structure.

[0008] The beneficial effect of adopting the above-mentioned further scheme is that the upper half of the drainage blind pipe adopts a toothed mesh-type permeable pipe, which has good water permeability.

[0009] Furthermore, the hydrophobic blind pipe is wrapped with geotextile.

[0010] The beneficial effect of adopting the above-mentioned further solution is that by wrapping the drainage blind pipe with geotextile, soil is prevented from entering the drainage blind pipe through the permeable holes.

[0011] Furthermore, a natural medium sand filter layer is provided between the gravel drainage layer and the geotextile of the drainage blind pipe.

[0012] The beneficial effect of adopting the above-mentioned further solution is that by setting a natural medium sand filter layer, the seepage water can be further filtered.

[0013] Furthermore, the maintenance water supply pipe is connected to one end of the swing frame via a tee connector, and the other end of the swing frame is connected to the lower end of the sprinkler head.

[0014] The beneficial effect of adopting the above-mentioned further solution is that the connection of the sprinkler heads is facilitated by setting up the swing frame.

[0015] Furthermore, the drainage ditch is located between the stadium lawn and the stadium running track and above the basement roof slab.

[0016] Furthermore, multiple drainage blind pipes are provided, and all of the drainage blind pipes are arranged along the lateral extension of the stadium.

[0017] The beneficial effects of adopting the above-mentioned further solution are: it can cover all areas of the stadium lawn and can drain water from all areas of the stadium lawn.

[0018] Furthermore, the stadium lawn has a rectangular structure, which includes two oppositely arranged long sides and two oppositely arranged short sides. Multiple first sprinkler heads are provided on the inner side of the two long sides of the stadium lawn, multiple second sprinkler heads are provided on the inner side of one short side of the stadium lawn, multiple third sprinkler heads are provided on the inner side of the other short side of the stadium lawn, and multiple fourth sprinkler heads and multiple fifth sprinkler heads are provided inside the stadium lawn. The multiple fourth sprinkler heads and multiple fifth sprinkler heads are arranged in two rows at intervals along the direction parallel to the long side of the rectangular structure. Multiple first spray nozzles are connected in series via a first maintenance water supply pipe, which is arranged in a ring. Multiple second spray nozzles are connected in series via a second maintenance water supply pipe, multiple third spray nozzles are connected in series via a third maintenance water supply pipe, multiple fourth spray nozzles are connected in series via a fourth maintenance water supply pipe, and multiple fifth spray nozzles are connected in series via a fifth maintenance water supply pipe. The second, third, fourth, and fifth maintenance water supply pipes are all connected to and communicate with the first maintenance water supply pipe.

[0019] The beneficial effect of adopting the above-mentioned further solution is that by rationally arranging multiple sprinkler heads and connecting them with corresponding maintenance water supply pipes, maintenance water supply can be provided to all areas of the stadium lawn.

[0020] Furthermore, a first solenoid valve is provided at the connection between the second maintenance water supply pipe and the first maintenance water supply pipe, a second solenoid valve is provided at the connection between the third maintenance water supply pipe and the first maintenance water supply pipe, a third solenoid valve is provided at the connection between the fourth maintenance water supply pipe and the first maintenance water supply pipe, and a fourth solenoid valve is provided at the connection between the fifth maintenance water supply pipe and the first maintenance water supply pipe.

[0021] The beneficial effect of adopting the above-mentioned further solution is that by setting up a solenoid valve, the on / off state of the corresponding maintenance water supply pipe can be controlled as needed.

[0022] Furthermore, the first maintenance water supply pipe is also connected to a rapid water extractor via a water intake pipe, and a fifth solenoid valve is connected to the water intake pipe.

[0023] The beneficial effect of adopting the above-mentioned further solution is that by setting up a rapid water dispenser, water can be drawn from the rapid water dispenser when temporary water use is needed. Attached Figure Description

[0024] Figure 1 This is a three-dimensional structural diagram of the water supply pipe used in this utility model. Figure 2 This is a schematic diagram of the main structure of the water supply pipe for maintenance according to this utility model; Figure 3 for Figure 2 Schematic diagram of the cross-sectional structure of AA; Figure 4 This is a schematic diagram of the connection between the maintenance water supply pipe and the sprinkler head of this utility model; Figure 5 This is a schematic cross-sectional view of the drainage and maintenance structure for the stadium above the basement roof slab of this utility model. Figure 1 ; Figure 6 This is a schematic cross-sectional view of the drainage and maintenance structure for the stadium above the basement roof slab of this utility model. Figure 2 ; Figure 7 This is a schematic diagram of the arrangement structure of the hydrophobic blind tube of this utility model; Figure 8 This is a schematic diagram of the layout structure of the maintenance water supply pipe of this utility model; Figure 9 for Figure 8 Enlarged structural diagram of section A in the middle; Figure 10 for Figure 8 A magnified structural diagram of section B.

[0025] The attached diagram lists the components represented by each number as follows: 1. First maintenance water supply pipe; 11. Second maintenance water supply pipe; 12. Third maintenance water supply pipe; 13. Fourth maintenance water supply pipe; 14. Fifth maintenance water supply pipe; 15. Water intake pipeline; 16. Municipal water pipe; 2. First spray nozzle; 21. Second spray nozzle; 22. Third spray nozzle; 23. Fourth spray nozzle; 24. Fifth spray nozzle; 3. First solenoid valve; 31. Second solenoid valve; 32. Third solenoid valve; 33. Fourth solenoid valve; 34. Fifth solenoid valve; 35. Main valve; 36. Cable; 4. Rapid water dispenser; 5. Drainage ditch; 6. Drainage pipe; 61. Crushed stone drainage layer; 62. Geotextile; 63. Natural medium sand filter layer; 64. Soil layer; 65. Permeable holes; 7. T-joint; 71. Stretcher; 72. Maintenance water supply pipe; 73. Sprinkler head; 8. Stadium lawn; 81. Stadium running track; 82. Basement roof. Detailed Implementation

[0026] The principles and features of this utility model are described below. The examples given are only for explaining this utility model and are not intended to limit the scope of this utility model.

[0027] Example 1 like Figures 1-6 As shown in the figure, a drainage and maintenance structure for a stadium above a basement roof slab in this embodiment includes a maintenance water supply pipe 72, a sprinkler head 73, a drainage blind pipe 6, and a gravel drainage layer 61. The maintenance water supply pipe 72, the drainage blind pipe 6, and the gravel drainage layer 61 are all buried in the soil layer 64 between the basement roof slab 82 and the stadium lawn 8. The two ends of the drainage blind pipe 6 are respectively connected to the drainage ditch 5 of the stadium. The upper half of the drainage blind pipe 6 is provided with a water permeable hole 65. The gravel drainage layer 61 is wrapped around the drainage blind pipe 6. The maintenance water supply pipe 72 is arranged at intervals above the gravel drainage layer 61 and is connected to the sprinkler head 73 located on the surface of the stadium lawn 8.

[0028] like Figures 1-3 As shown, in one specific embodiment, the upper half of the hydrophobic blind pipe 6 is a permeable pipe with a mahogany mesh design. The upper half of the hydrophobic blind pipe uses a mahogany mesh design, which provides good permeability.

[0029] like Figure 1 As shown, in a preferred embodiment, the drainage blind pipe 6 is wrapped with geotextile 62. By wrapping the drainage blind pipe with geotextile, soil is prevented from entering the drainage blind pipe through the permeable holes.

[0030] like Figure 1As shown, a further embodiment of this solution includes a natural medium sand filter layer 63 between the gravel drainage layer 61 and the geotextile 62 of the drainage blind pipe 6. By providing the natural medium sand filter layer, seepage water can be further filtered.

[0031] like Figures 4-6 As shown, in one specific embodiment, the maintenance water supply pipe 72 is connected to one end of the swing frame 71 via a tee connector 7, and the other end of the swing frame 71 is connected to the lower end of the sprinkler head 73. The swing frame facilitates the connection of the sprinkler head.

[0032] like Figure 5 and Figure 6 As shown, preferably, the drainage ditch 5 is located between the stadium lawn 8 and the stadium running track 81 and above the basement roof 82.

[0033] like Figure 7 As shown, multiple drainage pipes 6 are provided, and all of the drainage pipes 6 are arranged along the lateral extension of the stadium. They can cover all areas of the stadium lawn, allowing for drainage of water from all areas of the lawn.

[0034] This embodiment describes a drainage and maintenance structure for a sports field above a basement roof. By installing drainage blind pipes and a gravel drainage layer in the soil layer of the sports field lawn, it can prevent water accumulation and other problems. This drainage and maintenance structure consists of two parts: water supply and drainage. It improves the standardization of sports field lawn maintenance, allowing for controlled maintenance at regular intervals and effectively dissipating excess water.

[0035] Example 2 Based on Embodiment 1, this embodiment provides a preferred layout scheme for the spray nozzle 73. For example... Figures 8-10 As shown, the stadium lawn 8 has a rectangular structure, which includes two oppositely arranged long sides and two oppositely arranged short sides. Multiple first sprinkler heads 2 are provided on the inner side of the two long sides of the stadium lawn 8, multiple second sprinkler heads 21 are provided on the inner side of one short side of the stadium lawn 8, multiple third sprinkler heads 22 are provided on the inner side of the other short side of the stadium lawn 8, and multiple fourth sprinkler heads 23 and multiple fifth sprinkler heads 24 are provided inside the stadium lawn 8. The multiple fourth sprinkler heads 23 and multiple fifth sprinkler heads 24 are arranged in two rows at intervals along the direction parallel to the long side of the rectangular structure. Multiple first sprinkler heads 2 are connected in series via a first maintenance water supply pipe 1, which is arranged in a ring. Multiple second sprinkler heads 21 are connected in series via a second maintenance water supply pipe 11, multiple third sprinkler heads 22 are connected in series via a third maintenance water supply pipe 12, multiple fourth sprinkler heads 23 are connected in series via a fourth maintenance water supply pipe 13, and multiple fifth sprinkler heads 24 are connected in series via a fifth maintenance water supply pipe 14. The second, third, fourth, and fifth maintenance water supply pipes 11, 12, 13, and 14 are all connected to and communicate with the first maintenance water supply pipe 1. By rationally arranging the multiple sprinkler heads and connecting them to the corresponding maintenance water supply pipes, maintenance water supply can be provided to all areas of the stadium lawn.

[0036] In this embodiment, the first maintenance water supply pipe 1 supplies water through the municipal water pipe 16, and then supplies water to the second maintenance water supply pipe 11, the third maintenance water supply pipe 12, the fourth maintenance water supply pipe 13 and the fifth maintenance water supply pipe 14 respectively.

[0037] In this embodiment, two second maintenance water supply pipes 11 and two third maintenance water supply pipes 12 are provided. One second maintenance water supply pipe 11 has its two ends connected to the two outermost second spray nozzles 21, and the other second maintenance water supply pipe 11 has its two ends connected to the two innermost second spray nozzles 21. Both of these second maintenance water supply pipes 11 are connected to the first maintenance water supply pipe 1, and each connection point is equipped with a second solenoid valve 31. Similarly, in this embodiment, one third maintenance water supply pipe 12 has its two ends connected to the two outermost third spray nozzles 22, and the other third maintenance water supply pipe 12 has its two ends connected to the two innermost third spray nozzles 22. Both of these third maintenance water supply pipes 12 are connected to the first maintenance water supply pipe 1, and each connection point is equipped with a first solenoid valve 3.

[0038] Example 3 Based on Embodiment 1 or Embodiment 2, this embodiment provides a scheme for controlling the on / off state of the maintenance water supply pipe 72. For example... Figures 8-10 As shown, a first solenoid valve 3 is provided at the connection between the second maintenance water supply pipe 11 and the first maintenance water supply pipe 1; a second solenoid valve 31 is provided at the connection between the third maintenance water supply pipe 12 and the first maintenance water supply pipe 1; a third solenoid valve 32 is provided at the connection between the fourth maintenance water supply pipe 13 and the first maintenance water supply pipe 1; and a fourth solenoid valve 33 is provided at the connection between the fifth maintenance water supply pipe 14 and the first maintenance water supply pipe 1. By setting the solenoid valves, the on / off state of the corresponding maintenance water supply pipe can be controlled as needed.

[0039] like Figure 8 and Figure 9As shown, in a further embodiment, the first maintenance water supply pipe 1 is also connected to a rapid water dispenser 4 via a water intake pipe 15, and a fifth solenoid valve 34 is connected to the water intake pipe 15. By setting up the rapid water dispenser, water can be drawn from the rapid water dispenser when temporary water use is required.

[0040] In this embodiment, the first solenoid valve 3, the second solenoid valve 31, the third solenoid valve 32, the fourth solenoid valve 33, and the fifth solenoid valve 34 are electrically connected via cable 36 and connected to the main valve 35.

[0041] This utility model is applied to stadiums. During construction, it is carried out according to the construction drawings. The drainage and maintenance structure of this utility model is extremely suitable for stadiums with underground garages on the roof slab. The first step is to lay out the points of the stadium according to the detailed design drawings. After confirming their positions, the initial backfilling of the basement roof slab is carried out. The backfilling is carried out to the height required by the design to meet the laying height of the drainage blind pipe. After the backfilling is completed, a small excavator is used to excavate according to the spacing and depth of the drainage blind pipe. During the excavation, attention should be paid to the drainage slope, which is generally 0.5%. After the excavation is completed, the drainage blind pipe is laid. The drainage blind pipe adopts the pre-made permeable pipe with a mesh pattern that is already available on the market. This type of drainage blind pipe has obvious characteristics. The main feature is that the top is an open mesh structure and the bottom is a closed structure. During installation, the closed structure is at the bottom and the open mesh structure is at the top, which facilitates the collection and rapid drainage of water. The drainage blind pipe is covered with a layer of geotextile for filtration during the water collection process. The longitudinal installation of the drainage blind pipes uses prefabricated connectors to connect the pipes. During installation, attention must be paid to the drainage slope and the firmness of the pipe connections. Both ends of the longitudinal section of the drainage blind pipe are drainage ditches, constructed of brick or concrete. There are two drainage ditches, an inner one arranged in a ring around the perimeter of the sports turf and an outer one arranged around the outer ring of the running track. The inner and outer drainage ditches are connected by pipes to ensure unobstructed drainage. After installation, the trench is backfilled. The first layer of backfill is covered with a natural medium sand filter layer, approximately 150mm thick. This is followed by a gravel drainage layer, approximately 250mm thick. Then, the entire sports field is backfilled. During this process, attention must be paid to the compaction and flatness of the backfill. After backfilling to the design elevation for the maintenance water supply pipes and sprinkler heads, the maintenance water supply pipes and sprinkler heads are installed. The maintenance water supply pipes are configured on-site according to design requirements. The sprinkler heads are arranged in the form of swing frames, which can be adjusted 360 degrees. The working principle of the sprinkler heads is that when the water supply pipe is pressurized, the sprinkler heads automatically rise and open to rotate 360 ​​degrees to maintain the lawn. After the water supply is turned off, they automatically fall back and shut off. The maintenance sprinkler heads are installed at a height close to the roots of the planted lawn. To facilitate better maintenance, quick water dispensers are set up around the perimeter and in the middle of the field for manual water collection at any time. After the maintenance water supply pipes and sprinkler heads are installed, backfilling is carried out again. This backfilling is done to the design elevation of the planting soil. After completion, the planting soil is spread. The planting soil is a 250mm thick root layer, mainly composed of medium and fine sand, with fine sand accounting for more than 85%, supplemented with peat moss, soil conditioner, organic fertilizer, phosphate fertilizer, compound fertilizer, pesticides, fungicides and other fertilizers, which are rotary tilled and mixed. The planting soil is a pre-mixed product prepared by the manufacturer and transported to the site. It is then manually spread onto the lawn planting area. At the same time, an irrigation system is used to moisten and settle the planting soil, ensuring it reaches its optimal condition for better planting.After the planting soil is laid, the final turf planting work is carried out. After the turf is planted, the maintenance work of the sports football field turf is carried out. The working principle of the drainage maintenance structure of this utility model is that a water supply maintenance system with an electronic control device is used for centralized control of maintenance. The maintenance work of the sports football field turf is carried out at fixed times and locations every day. Excess water from maintenance and excess water from rainy days are collected through the drainage blind pipes of the drainage structure and then flow into the drainage ditch, where the excess water is drained away.

[0042] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "long side", "short side", "upper", "lower", "top", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0043] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0044] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0045] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0046] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0047] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A drainage and maintenance structure for a stadium above a basement roof slab, characterized in that, The system includes a maintenance water supply pipe, sprinkler heads, drainage blind pipes, and a gravel drainage layer. The maintenance water supply pipe, drainage blind pipe, and gravel drainage layer are all buried in the soil layer between the basement roof slab and the stadium lawn. The two ends of the drainage blind pipe are connected to the stadium's drainage ditch. The upper half of the drainage blind pipe is provided with water permeable holes. The gravel drainage layer is wrapped around the drainage blind pipe. The maintenance water supply pipe is arranged at intervals above the gravel drainage layer and is connected to the sprinkler heads located on the surface of the stadium lawn.

2. The drainage and maintenance structure for a stadium above a basement roof slab according to claim 1, characterized in that, The upper half of the hydrophobic blind pipe is a permeable pipe with a mesh-like structure.

3. The drainage and maintenance structure for a stadium above a basement roof slab according to claim 1, characterized in that, The hydrophobic blind pipe is wrapped with geotextile.

4. The drainage and maintenance structure for a stadium above a basement roof slab according to claim 1, characterized in that, A layer of natural medium sand filter is also provided between the gravel drainage layer and the geotextile of the drainage blind pipe.

5. The drainage and maintenance structure for a stadium above a basement roof slab according to claim 1, characterized in that, The maintenance water supply pipe is connected to one end of the swing frame via a T-joint, and the other end of the swing frame is connected to the lower end of the sprinkler head.

6. The drainage and maintenance structure for a stadium above a basement roof slab according to claim 1, characterized in that, The drainage ditch is located between the stadium lawn and the stadium running track and above the basement ceiling.

7. The drainage and maintenance structure for a stadium above a basement roof slab according to claim 1, characterized in that, Multiple drainage blind pipes are provided, and all of the drainage blind pipes are arranged along the lateral extension of the stadium.

8. The drainage and maintenance structure for a stadium above a basement roof slab according to claim 1, characterized in that, The stadium lawn has a rectangular structure, which includes two oppositely arranged long sides and two oppositely arranged short sides. Multiple first sprinkler heads are provided on the inner side of the two long sides of the stadium lawn, multiple second sprinkler heads are provided on the inner side of one short side of the stadium lawn, multiple third sprinkler heads are provided on the inner side of the other short side of the stadium lawn, and multiple fourth sprinkler heads and multiple fifth sprinkler heads are provided inside the stadium lawn. The multiple fourth sprinkler heads and multiple fifth sprinkler heads are arranged in two rows at intervals along the direction parallel to the long side of the rectangular structure. Multiple first spray nozzles are connected in series via a first maintenance water supply pipe, which is arranged in a ring. Multiple second spray nozzles are connected in series via a second maintenance water supply pipe, multiple third spray nozzles are connected in series via a third maintenance water supply pipe, multiple fourth spray nozzles are connected in series via a fourth maintenance water supply pipe, and multiple fifth spray nozzles are connected in series via a fifth maintenance water supply pipe. The second, third, fourth, and fifth maintenance water supply pipes are all connected to and communicate with the first maintenance water supply pipe.

9. The drainage and maintenance structure for a stadium above a basement roof slab according to claim 8, characterized in that, A first solenoid valve is provided at the connection between the second maintenance water supply pipe and the first maintenance water supply pipe; a second solenoid valve is provided at the connection between the third maintenance water supply pipe and the first maintenance water supply pipe; a third solenoid valve is provided at the connection between the fourth maintenance water supply pipe and the first maintenance water supply pipe; and a fourth solenoid valve is provided at the connection between the fifth maintenance water supply pipe and the first maintenance water supply pipe.

10. The drainage and maintenance structure for a stadium above a basement roof slab according to claim 8, characterized in that, The first maintenance water supply pipe is also connected to a rapid water extractor via a water intake pipe, and a fifth solenoid valve is connected to the water intake pipe.

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