Subsidence square drainage structure and construction method thereof

Abstract

This application relates to the technical field of building drainage, providing a drainage structure for a sunken plaza, comprising a drainage ditch, a diversion channel, a greening box, and a conveying mechanism. The drainage ditch is excavated at the bottom of the plaza and extends circumferentially along the plaza. The diversion channel is excavated on the steps of the plaza and extends along the length of the steps. The greening box is located on the steps, its interior communicating with the drainage ditch, and the end of the diversion channel communicating with the opening of the greening box. The conveying mechanism includes multiple conveying pipes, each passing through a filter plate, with one end extending to the drainage ditch and the other end extending to the greening box. The conveying pipes are filled with conveying sponges. The drainage ditch has an inlet and an outlet, with an inlet gate and an outlet gate hinged to two opposing surfaces of the ditch wall, the inlet gate abutting against the inner surface of the ditch wall. This application effectively balances the water resource utilization of the sunken plaza under different climates.

Description

Technical Field

[0001] This application relates to the technical field of building drainage, and in particular to a drainage structure for a sunken plaza and its construction method. Background Technology

[0002] Sunken plazas are a design technique for urban public spaces that has been widely used in recent years. A sunken plaza is an enclosed, open public space that is wholly or partially sunken below the surrounding ground, with its base connected to the surrounding ground by steps.

[0003] Meanwhile, greenery is typically designed at the steps of sunken plazas. Due to weather conditions, the greenery may experience water shortages during periods of low rainfall. Conversely, during periods of heavy rainfall, rainwater from the surrounding ground flows down the steps to the bottom of the plaza, increasing drainage pressure. Furthermore, large amounts of rainwater accumulate in the soil of the greenery, causing damage to the plants. Therefore, a drainage structure is needed to balance drainage and water resource utilization in sunken plazas under different climates. Summary of the Invention

[0004] To balance the water resource utilization of sunken plazas in different climates, this application provides a drainage structure for sunken plazas and its construction method.

[0005] On the one hand, the drainage structure of the sunken plaza provided in this application adopts the following technical solution: A drainage structure for a sunken plaza includes a drainage ditch, a diversion channel, a greening box, and a conveying mechanism. The drainage ditch is excavated at the bottom of the plaza and extends circumferentially along the plaza. The diversion channel is excavated on the steps of the plaza and extends along the length of the steps, with the upper surface of the steps containing the diversion channel inclined. The greening box is located on the steps, its interior communicating with the drainage ditch, and the end of the diversion channel communicating with the opening of the greening box. The greening box contains a filter plate for holding soil. The conveying mechanism includes multiple conveying pipes. All conveying pipes pass through the filter plate, with one end extending to the drainage ditch and the other end extending to the opening of the greening box. The conveying pipes are filled with conveying sponges, and the portions of the conveying pipes above the filter plate and in the drainage ditch are provided with multiple conveying holes for water supply. The drainage ditch is provided with an inlet and an outlet, both of which are connected to the municipal pipe network. The drainage ditch wall has an inlet gate and an outlet gate hinged to two opposing surfaces, with the inlet gate abutting against the inner surface of the ditch wall and the outlet gate located above the inlet gate.

[0006] By adopting the above technical solution, water at the bottom of the square flows into the drainage ditch. If the water volume is large and the water level in the drainage ditch is high, the outlet gate will flip relative to the ditch wall under the action of water pressure, and the water in the drainage ditch will be discharged into the municipal pipe network drainage system through the outlet. When the water level in the drainage ditch drops to the position of the inlet gate, the municipal pipe network will replenish the drainage ditch with water from the inlet.

[0007] Therefore, under normal circumstances, the water level in the drainage ditch is between the inlet and outlet gates. The conveying sponge extending into the drainage ditch is soaked in water, and the water from the ditch enters the conveying pipe through the conveying holes. Under capillary action, the water is transported through the conveying sponge and the conveying pipe to the soil above the filter plate, supplying water to the green soil and ensuring sufficient moisture even in low rainfall conditions. When rainfall is heavy, water from the surrounding ground and steps flows down the steps to the steps equipped with diversion channels. The water is then blocked by the inclined upper surface of the steps and flows into the diversion channels. The water in the diversion channels then flows into the greening boxes, passes through the soil in the greening boxes and the filter plate, and finally flows into the drainage ditch. This reduces the amount of water flowing down the steps to the bottom of the plaza, thus reducing the drainage pressure at the bottom of the plaza. Through this design, the sunken plaza does not experience excessive drainage pressure during the rainy season and can still supply water to the green plants during seasons with less rainfall, thereby balancing the drainage and water resource utilization of the sunken plaza in different climates.

[0008] Optionally, a water storage area is provided below the greening box, the interior of the greening box is connected to the water storage area, and the drainage ditch is connected to the water storage area; the bottom surface of the water storage area is lower than the bottom surface of the drainage ditch.

[0009] By adopting the above technical solution, when the rainfall is heavy, the water at the bottom of the square flows into the water storage area through the drainage ditch for temporary storage; some of the water on the surrounding ground and steps flows into the water storage area through the green boxes for temporary storage, thereby reducing the drainage pressure of the drainage ditch.

[0010] Optionally, one end of the conveying sponge is provided with a first connector and the other end is provided with a second connector; the surface of the first connector facing away from the second connector is provided with a screw, and the surface of the second connector facing away from the first connector is provided with a screw hole, the screw hole being used for threaded engagement with a screw connected to another conveying sponge.

[0011] If a sponge is soaked for an extended period, it may decompose or break down, affecting its filtration and absorption capacity. By employing the above-mentioned technical solution, the conveyor sponge is replaced periodically to ensure its water conveying capacity. When replacing the conveyor sponge, first connect the first and second connectors of the new sponge using screws and screw holes. Then, pull the old conveyor sponge relative to the conveying pipe, simultaneously pulling the new sponge into the pipe as the old sponge is pulled out. This allows for a simple and quick replacement of the conveyor sponge.

[0012] Optionally, the delivery pipe is made of a flexible material.

[0013] By adopting the above technical solution, it is convenient to lay the delivery pipe in the drainage ditch.

[0014] Optionally, the conveying sponge is provided with a metal hose inside, one end of which is threaded to the first connector and the other end of which is threaded to the second connector.

[0015] By adopting the above technical solution, firstly, the metal hose provides support for the conveying sponge, reducing the risk of deformation of the conveying sponge after absorbing water, which in turn causes deformation of the conveying pipe; secondly, the metal hose establishes a connection between the first and second connectors, reducing the risk of the first or second connector falling off the conveying sponge during sponge replacement; and thirdly, the metal hose also reduces the risk of difficulty in replacement due to sponge breakage during the sponge replacement process.

[0016] Optionally, the upper surface of the filter plate is provided with a release sponge.

[0017] By adopting the above technical solution, on the one hand, some of the water transported by the delivery pipe to the filter plate enters the release sponge and then enters the soil, thereby improving the uniformity of water distribution in the soil; on the other hand, the release sponge provides support for the soil, reducing the risk of soil being washed into the water storage area when water flows from the greening box to the water storage area; in addition, when installing the delivery pipe, the release sponge with a certain thickness can also be used to position the delivery pipe, improving the convenience of installation.

[0018] Optionally, the greening box can be detachably connected to a planting box for holding soil. The side and bottom walls of the planting box are provided with multiple water holes, and the planting box is located above the release sponge.

[0019] By adopting the above technical solution, plants are planted in planting boxes, and the planting boxes and greening boxes are detachably connected. This facilitates the replacement of the release and delivery sponges, and also allows for the replacement of plants with different habits according to different seasons and different ornamental needs, thus improving the flexibility of the greening boxes.

[0020] Optionally, a water storage interval is provided between the outer wall and the inner wall of the greening box, and the diversion channel is connected to the water storage interval.

[0021] By adopting the above technical solution, when the rainfall is heavy, the water on the surrounding ground and some of the water on the steps will flow into the water storage compartment through the diversion channel for temporary storage, thereby reducing the drainage pressure of the green box.

[0022] On the other hand, the construction method for the drainage structure of a sunken plaza provided in this application adopts the following technical solution: A construction method for a drainage structure in a sunken plaza includes the following steps: S1: When constructing the plaza, the drainage ditch is dug at the bottom of the plaza, concrete is poured into the ditch wall, and the inlet, outlet, inlet gate and outlet gate are installed on the ditch wall. S2: When constructing the steps, concrete is poured on the steps to form the greening box, and a channel communicating with the drainage ditch is reserved inside the greening box during the pouring process; S3: Install the filter plate and the conveying mechanism.

[0023] In summary, this application includes at least one of the following beneficial technical effects: 1. When rainfall is heavy, the drainage channels and green boxes set on the steps are used to collect water from the ground around the plaza and on the steps, reducing the drainage pressure on the drainage ditch at the bottom of the plaza; when rainfall is light, the water in the drainage ditch is transported to the soil in the green boxes by the conveying mechanism, balancing the drainage and water resource utilization of the sunken plaza in different climates. 2. By setting a first connector and a second connector at both ends of the conveying sponge, the first connector can be detachably connected to the second connector of another conveying sponge, so as to facilitate the replacement of the conveying sponge and ensure that the conveying sponge has good conveying capacity; 3. By installing a flexible metal hose inside the conveying sponge, the conveying sponge can be supported by the flexible metal hose, and the conveying sponge can be easily replaced. Attached Figure Description

[0024] Figure 1 This is a structural schematic diagram of an embodiment of this application.

[0025] Figure 2 yes Figure 1 Enlarged diagram of part A.

[0026] Figure 3 This is a schematic diagram used to illustrate the structure of the guide channel.

[0027] Figure 4 This is a schematic diagram used to demonstrate the structure of the planting box.

[0028] Figure 5 yes Figure 4 Enlarged diagram in section B.

[0029] Figure 6 yes Figure 4 Enlarged diagram of section C.

[0030] Figure 7 This is a schematic diagram used to demonstrate the structure of the conveyor sponge.

[0031] Explanation of reference numerals in the attached drawings: 1. Drainage ditch; 11. Inlet; 12. Outlet; 13. Inlet gate; 14. Outlet gate; 2. Diversion channel; 3. Greening box; 31. Filter plate; 32. Release sponge; 33. Planting box; 34. Water storage compartment; 4. Conveying mechanism; 41. Conveying pipe; 42. Conveying sponge; 421. First connector; 422. Second connector; 423. Screw; 424. Screw hole; 425. Metal hose; 5. Water storage area. Detailed Implementation

[0032] The following is in conjunction with the appendix Figure 1-7 This application will be described in further detail.

[0033] This application discloses a drainage structure for a sunken plaza.

[0034] Reference Figure 1 , Figure 2 and Figure 3 A drainage structure for a sunken plaza includes a drainage ditch 1, a diversion channel 2, a greening box 3, and a conveying mechanism 4. The drainage ditch 1 is excavated at the bottom of the plaza and extends circumferentially along the plaza. The diversion channel 2 is excavated on the steps of the plaza and extends along the length of the steps; the upper surface of the steps with the diversion channel 2 is inclined. The greening box 3 is installed on the steps, its interior communicating with the drainage ditch 1, and the end of the diversion channel 2 communicating with the opening of the greening box 3.

[0035] Reference Figure 4 The greening box 3 is equipped with a filter plate 31 for holding soil.

[0036] Reference Figure 4 and Figure 5The conveying mechanism 4 includes multiple conveying pipes 41, all of which pass through the filter plate 31. One end of each conveying pipe 41 extends to the drainage ditch 1, and the other end extends to the opening of the greening box 3. Each conveying pipe 41 is filled with a conveying sponge 42. Conveying holes for water supply are provided in the portions of the conveying pipes 41 above the filter plate 31 and within the drainage ditch 1. The drainage ditch 1 is provided with an inlet 11 and an outlet 12, both of which are connected to the municipal water supply network. An inlet gate 13 and an outlet gate 14 are hinged to two opposing surfaces of the drainage ditch 1. The inlet gate 13 abuts against the inner surface of the ditch wall, and the outlet gate 14 is located above the inlet gate 13.

[0037] Using the above structure, under normal conditions, water at the bottom of the plaza flows into the drainage ditch 1, and some water on the surrounding ground and steps flows into the soil of the greening box 3 through the diversion channel 2. After being filtered by the soil and the filter plate 31, it flows into the drainage ditch 1 for storage. The water conveying mechanism transports the water in the drainage ditch 1 to the soil of the greening box 3 to keep the soil moist, so as to maintain a relatively balanced state between drainage and water resource utilization of the sunken plaza.

[0038] When rainfall is low, the water level in drainage ditch 1 drops, and the filtered or treated water in the municipal pipeline causes the inlet gate 13 to flip and enter the drainage ditch 1 from the inlet 11 to replenish the drainage ditch 1 and thus replenish the soil for greening.

[0039] When rainfall is heavy, water at the bottom of the plaza enters the drainage ditch 1, and some water from the surrounding ground and steps enters the drainage ditch 1 through the greening box 3. The water level in the drainage ditch 1 rises, causing the water gate 14 to flip and flow out from the outlet 12, thus balancing the drainage and water resource utilization of the sunken plaza in different climates.

[0040] The significance of tilting the steps with the diversion channel 2 is to divert the water on the surface of the steps into the diversion channel 2, thereby reducing the downward flow of water and reducing the drainage pressure at the bottom of the square.

[0041] Specifically, a filter screen is installed at the top of drainage ditch 1 to reduce the risk of impurities such as leaves entering drainage ditch 1. It is understood that the filter screen can be detachably or movably connected to drainage ditch 1 to facilitate maintenance of the drainage structure.

[0042] It is understandable that multiple green boxes 3 are set on the same step, and the multiple green boxes 3 on the same step are arranged at intervals along the length of the step; there are multiple steps with green boxes 3, and the multiple steps with green boxes 3 are arranged at intervals along the setting direction of all steps.

[0043] Reference Figure 4In this embodiment, a water storage area 5 is provided below the greening box 3. The interior of the greening box 3 is connected to the water storage area 5, and the drainage ditch 1 is also connected to the water storage area 5. The bottom surface of the water storage area 5 is lower than the bottom surface of the drainage ditch 1. With this design, when the rainfall is heavy, water at the bottom of the square flows into the water storage area 5 through the drainage ditch 1 for temporary storage, while water on the surrounding ground and steps flows down through the diversion channel 2 and the greening box 3 into the water storage area 5 for temporary storage, thereby reducing the drainage pressure on the drainage ditch 1 under heavy rainfall. In addition, with a water storage area 5 below the greening box 3, only the end of the conveying sponge 42 can be extended into the water storage area 5 to improve construction convenience.

[0044] In other embodiments, it may be sufficient to simply install a pipe for laying the delivery pipe 41 between the greening box 3 and the drainage ditch 1.

[0045] Reference Figure 6 Furthermore, a release sponge 32 is provided on the upper surface of the filter plate 31. This design serves two purposes: firstly, some of the water transported by the conveying pipe 41 to the top of the filter plate 31 enters the release sponge 32, allowing it to penetrate the soil more fully through contact with the soil bottom, thus improving the uniformity of water distribution in the soil; secondly, the release sponge 32 provides support for the soil, reducing the risk of soil being washed into the water storage area 5 when water flows from the greening box 3 into the water storage area 5; additionally, the release sponge 32, with its certain thickness, can be used to position the conveying pipe 41 during installation, improving the ease of installation. Furthermore, the greening box 3 is detachably connected to a planting box 33 for holding soil. The side and bottom walls of the planting box 33 are provided with multiple water holes. The planting box 33 is located above the release sponge 32, which facilitates the replacement of the release sponge 32 and the replacement of plants with different habits according to the season or landscape requirements.

[0046] Furthermore, there is a water storage compartment 34 between the outer wall and the inner wall of the greening box 3, and the diversion channel 2 is connected to the water storage compartment 34. This allows water from the surrounding ground and some water from the steps to flow into the water storage compartment 34 for temporary storage when there is heavy rainfall, thereby reducing the drainage pressure of the greening box 3.

[0047] Reference Figure 7The conveying sponge 42 has the following specific structure: one end of the conveying sponge 42 is provided with a first connecting member 421, and the other end is provided with a second connecting member 422. A screw 423 is provided on the surface of the first connecting member 421 opposite to the surface of the second connecting member 422, and the screw 423 extends along the length of the conveying sponge 42. A screw hole 424 is provided on the surface of the second connecting member 422 opposite to the surface of the first connecting member 421, and the screw hole 424 extends along the length of the conveying sponge 42. The screw hole 424 is used for threaded engagement with the screw 423 connected to the other conveying sponge 42. Because the sponge will deform and its water conveying and filtering capabilities will weaken after long-term soaking, it is necessary to replace the conveying sponge 42 regularly. When replacing the conveying sponge 42, take a new conveying sponge 42 and connect it to the old conveying sponge 42 through the mutual cooperation of the thread and screw 423. Then, pull the old conveying sponge 42 relative to the conveying pipe 41. While pulling the old conveying sponge 42 out of the conveying pipe 41, the new conveying sponge 42 is filled into the conveying pipe 41, which can be done simply and quickly.

[0048] It is understood that in other embodiments, the first connector 421 and the second connector 422 can also be detachably connected by other structures, as long as after the two are connected, the old conveying sponge 42 can drive the new conveying sponge 42 to move along the length of the conveying pipe 41 in the conveying pipe 41.

[0049] The first connector 421 and the second connector 422 can be made of plastic or stainless steel.

[0050] Furthermore, in this embodiment, a metal hose 425 is provided inside the conveying sponge 42. One end of the metal hose 425 is connected to the first connector 421, and the other end is connected to the second connector 422. This design achieves several advantages: First, the metal hose 425 provides support for the conveying sponge 42, reducing the risk of deformation of the conveying sponge 42 after absorbing water, which in turn causes deformation of the conveying pipe 41. Second, the metal hose 425 establishes a connection between the first connector 421 and the second connector 422, reducing the risk of either connector 421 or connector 422 detaching from the conveying sponge 42 during sponge replacement. Third, the metal hose 425 also reduces the risk of the conveying sponge 42 becoming difficult to replace due to breakage during replacement.

[0051] The connection between the first connector 421 and the metal hose 425, and between the second connector 422 and the metal hose 425, can be a threaded connection, an integral molding, or a welding fixation.

[0052] The implementation principle of the drainage structure of a sunken plaza in this application embodiment is as follows: when the rainfall is small, the water in the sunken plaza is discharged into the drainage ditch 1 at the bottom of the plaza, and is transported to the soil in the planting box 33 by the action of the conveying sponge 42 and the conveying pipe 41 to replenish the soil moisture; when the water level in the drainage ditch 1 is too low, the inlet gate 13 is flipped relative to the drainage ditch 1, and the water in the municipal pipeline is replenished into the drainage ditch 1 through the inlet 11.

[0053] When rainfall is heavy, some of the water on the ground and steps around the square flows into the gap between the planting box 33 and the green box 3 through the diversion channel 2. After being filtered by the release sponge 32 and the filter plate 31, it flows into the water storage area 5 below the planting box 33. Another part of the water is fed into the water storage area 5 from the drainage ditch 1 for temporary storage. At the same time, when the water level in the drainage ditch 1 is high, the water in the drainage ditch 1 drives the water outlet gate 14 to connect with the drainage ditch 1, so that the water in the drainage ditch 1 is discharged from the building.

[0054] This allows the water in the drainage ditch 1 to provide moisture for the plants in the greening box 3 when rainfall is low, while reducing the drainage pressure on the plaza when rainfall is high, thus balancing the drainage and water resource utilization of the sunken plaza under different climates with varying rainfall.

[0055] This application also discloses a construction method for a sunken plaza, including the following steps: S1: When constructing the plaza, a drainage ditch 1 shall be dug along the circumference of the plaza at the bottom of the plaza; S2: Erect formwork on the wall of drainage ditch 1 and pour concrete. When pouring concrete, reserve an inlet 11 and an outlet 12 on the wall of drainage ditch 1. The inlet 11 is located below the outlet 12. S3: Install an inlet gate 13 and an outlet gate 14 on the wall of the drainage ditch 1; S4: When constructing the steps, dig a passage at the location of the green box 3, and make the bottom of the passage lower than the bottom of the drainage ditch 1. The passages corresponding to the green boxes 3 in the same row are interconnected to form a water storage area 5. S5: Stack the filter plate 31 and the release sponge 32 on top of each other, install the conveying pipe 41 filled with the conveying sponge 42 on the filter plate 31 and the release sponge 32, and then install the filter plate 31 connected with the conveying pipe 41 and the release sponge 32 in the green box 3. S6: Place the planting box 33 above the release sponge 32.

[0056] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A drainage structure for a sunken plaza, characterized in that: It includes a drainage ditch (1), a diversion channel (2), a greening box (3), and a conveying mechanism (4); The drainage ditch (1) is excavated at the bottom of the square and extends along the circumference of the square; The diversion channel (2) is excavated on the steps of the square. The diversion channel (2) extends along the length of the steps, and the upper surface of the steps on which the diversion channel (2) is provided is inclined. The greening box (3) is set on the step, and the interior of the greening box (3) is connected to the drainage ditch (1). The end of the diversion channel (2) is connected to the opening of the greening box (3). The greening box (3) is provided with a filter plate (31) for bearing soil. The conveying mechanism (4) includes multiple conveying pipes (41), all of which pass through the filter plate (31). One end of each conveying pipe (41) extends to the drainage ditch (1), and the other end extends to the opening of the green box (3). Each conveying pipe (41) is filled with a conveying sponge (42). The portion of the conveying pipe (41) above the filter plate (31) and in the drainage ditch (1) is provided with multiple conveying holes for water supply. The drainage ditch (1) is provided with an inlet (11) and an outlet (12). Both the inlet (11) and the outlet (12) are connected to the municipal pipe network. The drainage ditch (1) has an inlet gate (13) and an outlet gate (14) hinged on two opposing surfaces. The inlet gate (13) abuts against the inner surface of the ditch wall, and the outlet gate (14) is located above the inlet gate (13). A water storage area (5) is provided below the greening box (3), the interior of the greening box (3) is connected to the water storage area (5), and the drainage ditch (1) is connected to the water storage area (5); the bottom surface of the water storage area (5) is lower than the bottom surface of the drainage ditch (1); The upper surface of the filter plate (31) is provided with a release sponge (32). The greening box (3) is detachably connected to a planting box (33) for holding soil. The side wall and bottom wall of the planting box (33) are provided with multiple water holes. The planting box (33) is located above the release sponge (32).

2. The drainage structure of a sunken plaza according to claim 1, characterized in that: One end of the conveying sponge (42) is provided with a first connector (421), and the other end is provided with a second connector (422); a screw (423) is provided on the surface of the first connector (421) away from the second connector (422), and a screw hole (424) is provided on the surface of the second connector (422) away from the first connector (421). The screw hole (424) is used for threaded engagement of the screw (423) connected to another conveying sponge (42).

3. The drainage structure of a sunken plaza according to claim 1, characterized in that: The delivery pipe (41) is made of flexible material.

4. The drainage structure of a sunken plaza according to claim 2, characterized in that: The conveying sponge (42) is provided with a metal hose (425) inside. One end of the metal hose (425) is threaded to the first connector (421), and the other end is threaded to the second connector (422).

5. The drainage structure of a sunken plaza according to claim 1, characterized in that: There is a water storage interval (34) between the outer wall of the greening box (3) and the inner wall of the greening box (3), and the diversion channel (2) is connected to the water storage interval (34).

6. A construction method for a drainage structure of a sunken plaza as described in any one of claims 1-5, characterized in that: Includes the following steps: S1: When constructing the square, the drainage ditch (1) is dug at the bottom of the square, concrete is poured on the wall of the drainage ditch (1), and the inlet (11), the outlet (12), the inlet gate (13) and the outlet gate (14) are set on the wall of the drainage ditch (1). S2: When constructing the steps, concrete is poured on the steps to form the green box (3), and a channel communicating with the drainage ditch (1) is reserved inside the green box (3) during the pouring process; S3: Install the filter plate (31) and the conveying mechanism (4).

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