Underground space flood regulation structure and flood regulation method

Abstract

The application relates to the technical field of flood regulation, and discloses an underground space flood regulation and storage structure, which comprises a bottom plate, a side wall and a retaining wall. The side wall and the bottom plate enclose a basement, the retaining wall, the side wall and the bottom plate enclose a fertilizer groove, the fertilizer groove is connected with a municipal pipe network through a water regulation pipeline, and the fertilizer groove is connected with the basement through an emergency pipeline. Compared with the prior art, the application is based on the design concept of a sponge city, the foundation pit fertilizer groove cavity around a newly-built basement is permanently reserved as a distributed flood storage room, the basement is used as a supplement, a 'normal fertilizer groove water storage utilization and emergency flood diversion into the basement' 'normal and emergency dual-purpose' regulation and control mode is adopted, a distributed resilience network is formed around the daily-used underground space in a zero-increased land mode, and the synergistic effect of urban space resources and flood control and drainage capacity is realized. The application also provides an underground space flood regulation and storage method, and has the advantages of optimizing a water storage process and strengthening a water storage effect.

Description

Technical Field

[0001] This invention relates to the field of flood control technology, and in particular to an underground space flood storage structure and method. Background Technology

[0002] As global climate change intensifies, urban flooding is becoming increasingly prominent, with extreme rainstorms posing a severe challenge to urban drainage systems. Meanwhile, the scale of urban underground space development continues to expand, and the trenches created during the construction and operation of underground structures are traditionally treated by backfilling, which not only wastes resources but also fails to realize their potential value.

[0003] In current urban flood control systems, existing water storage facilities often suffer from insufficient capacity and limited layout, making it difficult to quickly cope with surges in flood volume within a short period. Underground floodplains, as ring-shaped spaces surrounding the main structure, possess a certain volume and concealment, yet they have long remained idle, failing to participate in the urban flood control and water storage system, resulting in a waste of space resources. How to utilize floodplains for water storage and flood regulation to achieve synergistic effects between urban space resources and flood control and drainage capabilities is a technical problem that needs to be solved. Summary of the Invention

[0004] To address the aforementioned technical problems, the present invention aims to provide an underground space flood control and regulation structure that connects a flood storage tank to the municipal pipeline network, thereby utilizing the flood storage tank to achieve water storage and flood regulation, and realizing the effective utilization of underground space.

[0005] Based on this, the present invention provides an underground space flood control and storage structure, which includes a base slab, side walls and retaining walls located below the ground. A plurality of the side walls are connected end to end and fixedly installed on the top of the base slab, and the plurality of the side walls and the base slab enclose a basement. Multiple retaining walls are sequentially connected and fixedly installed on the top of the base plate, at least one retaining wall is spaced apart from the side wall, and the multiple retaining walls, the side wall and the base plate enclose a trough; An emergency pipe connecting the basement and the fertilizer tank is provided on the side wall, and a water diversion pipe connecting the fertilizer tank and the municipal pipe network is provided on the retaining wall. The top plate of the fertilizer tank is provided with a maintenance manhole, and there is at least one maintenance manhole, and each maintenance manhole is provided with a protective cover.

[0006] In some embodiments of this application, four retaining walls are provided, and the four retaining walls are respectively spaced apart from the side walls. The four retaining walls are connected end to end in sequence and are all fixedly connected to the base plate. The four retaining walls, the side walls and the base plate enclose the trough.

[0007] In some embodiments of this application, the retaining wall includes a first wall, a second wall, and a third wall, wherein the first wall is spaced apart from the side wall, the second wall and the third wall are respectively connected to the first retaining wall and the side wall, the first wall, the second wall, the third wall, and the side wall are all fixedly connected to the base plate, and the first wall, the second wall, the third wall, the side wall, and the base plate together form the trough.

[0008] In some embodiments of this application, a water collection well is provided at the edge of the basement, and one end of the emergency pipeline extends into the water collection well.

[0009] In some embodiments of this application, the municipal pipeline network includes a sedimentation tank, a municipal sand well, and a mud pump. One end of the water diversion pipeline extends into the sedimentation tank and is connected to the mud pump. The sedimentation tank and the municipal sand well are connected by a flap valve.

[0010] In some embodiments of this application, the top of the base plate is provided with a partition wall, which is connected to the side wall and the retaining wall respectively. There are at least two partition walls that divide the trough into several regulating chambers. Each regulating chamber has a maintenance manhole on its top plate, and each partition wall has a connecting pipe that connects the regulating chambers on both sides.

[0011] In some embodiments of this application, a protective net is provided below the protective cover.

[0012] In some embodiments of this application, a hydrophobic layer is provided at the bottom of the base plate.

[0013] In some embodiments of this application, the bottom of the base plate is connected to an anti-uplift pile.

[0014] Another objective of this application is to provide a method for flood control and storage in underground space, which adopts the aforementioned underground space flood control and storage structure and includes the following steps: S1. During daily production, open the water diversion pipe to discharge water from the municipal pipe network into the fertilizer tank, or discharge water from the fertilizer tank into the municipal pipe network to maintain the water level of the fertilizer tank. S2. During daily production, the maintenance manhole should be opened regularly to carry out dredging operations on the fertilizer tank and ensure the smooth flow of water diversion pipelines. S3. In the event of a flood, open the water diversion pipeline and emergency pipeline to drain the water in the fertilizer tank into the basement, and use the basement space for emergency water storage to divert the flood peak. S4. After the flood ends, close the emergency pipeline, drain the water from the basement, and restore the basement and fertilizer tank to normal use; S5. After the flood, inspect and dredge the fertilizer tank and basement to prepare for the next extreme working conditions.

[0015] This invention provides an underground flood control structure. Compared with the prior art, its advantages are as follows: This invention provides an underground flood control structure, including a base slab, side walls, and retaining walls located below ground level. Multiple side walls are connected end-to-end and located on top of the base slab, forming a basement. Multiple retaining walls are connected in sequence and located on top of the base slab, with at least one retaining wall spaced apart from the side walls, forming a trough. Emergency pipes connecting the basement and the trough are provided on the side walls, and water diversion pipes connecting the trough and the municipal pipe network are provided on the retaining walls. The top slab of the trough has at least one maintenance manhole, and each manhole is equipped with a protective cover. Based on the above structure, after waterproofing the trough, this application connects the trough to the municipal pipe network via water diversion pipes (including inlet and outlet pipes). During daily use, water from the municipal pipe network can be drained into the trough or water from the trough can be drained into the municipal pipe network as needed. In other words, this application abandons the original reservoir or deep tunnel and chooses to achieve water storage through a waterproof sump. The sump is equipped with various detection devices, including a water level sensor, which, in conjunction with the control system, adjusts the opening and closing of the water diversion pipes to maintain a reasonable water level in the sump. The manhole is designed as an open passage connecting the sump to the outside world, allowing operators to regularly clean the sump and ensure the smooth flow of the water diversion pipes. When the city experiences extreme flooding, operators continuously drain accumulated water from the municipal pipe network into the sump by opening all water diversion pipes to reduce the drainage pressure on the municipal pipe network. When the sump's storage capacity is close to saturation, the emergency pipes are opened to drain the accumulated water from the sump into the basement, utilizing the basement for emergency water storage and flood diversion. During emergency drainage, monitoring equipment can be used to continuously monitor data such as water pressure and drainage flow in the basement and related areas. After the flood disaster ends, the basement's own drainage system is activated to drain the water from the basement into the sump or municipal pipe network, completing the basement's reset and restoring the basement and sump to normal use. The sump and basement can then be inspected and cleaned through the maintenance manhole to prepare for the next extreme event. Thus, based on the design concept of sponge cities, this application permanently preserves the foundation pit and sump cavity around the newly built basement as a distributed flood storage chamber, with the basement serving as a supplement. Through a "dual-use" control mode of "storing water in the sump during normal times and diverting floodwater into the building during emergencies," effective flood control is achieved. This technology optimizes existing engineering processes, eliminates the need for traditional water storage tank construction, and overcomes the high costs and long cycles associated with deep tunnels and water storage tanks. With a low-cost model requiring zero new land use, it forms a distributed resilient network around the underground space used daily, achieving synergistic effects between urban space resources and flood control and drainage capabilities.

[0016] In addition, this application also provides a method for flood control and storage in underground spaces. Based on the water storage function of the trough, the water control and storage process is optimized. With a low-cost model of zero new land use, a distributed resilient network is formed around the basement, which realizes effective flood control and storage. Attached Figure Description

[0017] Figure 1 This is a top view of an underground space flood storage structure according to some embodiments of this application; Figure 2 This is a top view of an underground space flood storage structure according to other embodiments of this application, in which no partition wall is set in the trough; Figure 3 This is a structural schematic diagram of the basement and fertilizer tank according to some embodiments of this application; Figure 4 for Figure 1 Schematic diagram of AA section in the middle; Figure 5 for Figure 1 Another embodiment of the schematic diagram of cross-section AA; Figure 6 for Figure 1 Another embodiment of the schematic diagram of cross-section AA; Figure 7 for Figure 1 Schematic diagram of the BB cross section in the middle; Figure 8 The following are detailed structural drawings of the maintenance manholes according to some embodiments of this application.

[0018] In the diagram, 1. Basement; 2. Fertilizer tank; 3. Floor slab; 4. Side wall; 5. Retaining wall; 6. Sump; 7. Emergency pipeline; 8. Manhole; 9. Protective cover; 10. Protective net; 11. Water diversion pipeline; 12. Sedimentation tank; 13. Municipal sand well; 14. Mud pump; 15. Partition wall; 16. Connecting pipeline; 17. Drainage layer; 18. Pull-out pile; 19. Flap gate. Detailed Implementation

[0019] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and are not intended to limit the scope of the invention.

[0020] It should be understood that the terms "before," "after," etc., are used in this invention to describe various types of information, but this information should not be limited to these terms. These terms are only used to distinguish information of the same type from each other. For example, "before" information can also be called "after" information, and "after" information can also be called "before" information, without departing from the scope of this invention.

[0021] like Figures 1 to 8As shown, this embodiment of the invention provides an underground space flood control structure, including a base slab 3, side walls 4, and retaining walls 5 located below ground level. Multiple side walls 4 are connected end to end and fixedly installed on the top of the base slab 3, forming a basement 1 with the base slab 3. As for the retaining walls 5, multiple retaining walls 5 are connected end to end and fixedly installed on the top of the base slab 3, with at least one retaining wall 5 spaced apart from the side walls 4. Multiple retaining walls 5, side walls 4, and base slab 3 form a flood storage trough 2. Furthermore, the side walls 4 are provided with an emergency pipe 7 connecting the basement 1 and the flood storage trough 2, and the retaining walls 5 are provided with a water diversion pipe 11 connecting the flood storage trough 2 and the municipal pipe network. In addition, at least one inspection manhole 8 is provided on the top slab of the flood storage trough 2, and each inspection manhole 8 is provided with a protective cover 9. Based on the above structure, after waterproofing the fertilizer tank 2, this application connects the fertilizer tank 2 to the municipal pipe network via a water diversion pipe 11 (including an inlet pipe and an outlet pipe). During daily use, water from the municipal pipe network can be drained into the fertilizer tank 2 or vice versa, as needed. In other words, this application abandons the original water storage tank or deep tunnel, choosing instead to achieve water storage through the waterproof fertilizer tank 2. Simultaneously, the fertilizer tank 2 is equipped with various detection devices, including a water level sensor, which can work with the control system to adjust the opening and closing of the water diversion pipe, thereby maintaining a reasonable water level in the fertilizer tank 2. The maintenance manhole 8 is designed as an open channel connecting the fertilizer tank 2 to the outside world, allowing operators to regularly clean the fertilizer tank 2 and ensure the unobstructed flow of the water diversion pipe 11. When the city experiences extreme flooding, operators continuously drain water from the municipal pipe network into the flood tank 2 by opening all water diversion pipes 11 to reduce the drainage pressure on the municipal pipe network. When the flood tank 2's water storage capacity is close to saturation, emergency pipe 7 is opened to drain the water in the flood tank 2 into basement 1, utilizing basement 1 to achieve emergency water storage and flood peak diversion. During the emergency drainage process, monitoring equipment can be used to continuously monitor data such as water pressure and drainage flow in basement 1 and related areas of flood tank 2. After the flood disaster ends, the drainage system of basement 1 is activated to drain the water from basement 1 into flood tank 2 or the municipal pipe network, completing the reset of basement 1 and restoring basement 1 and flood tank 2 to normal operating status. Flood tank 2 and basement 1 are then cleaned and inspected through the maintenance manhole 8 to prepare for the next extreme operating conditions. Thus, based on the design concept of sponge cities, this application permanently preserves the cavity of the foundation pit trough 2 surrounding the newly built basement 1 as a distributed flood storage chamber, while basement 1 serves as a supplement. Through a "dual-use" regulation mode of "storing water in the trough during normal times and diverting floodwater into the chamber during emergencies," effective flood control is achieved. This technology optimizes existing engineering processes, eliminates the need for traditional water storage tank construction, and overcomes the problems of high cost and long cycle caused by setting up deep tunnels and water storage tanks. With a low-cost model of zero new land use, a distributed resilient network is formed, achieving synergistic effects between urban spatial resources and flood control and drainage capabilities.

[0022] Specifically, such as Figure 1 As shown, in some embodiments of the present invention, four retaining walls 5 are provided, and the four retaining walls 5 are respectively spaced apart from the side walls 4. The four retaining walls 5 are connected end to end and fixedly installed on the top of the base plate 3. The four retaining walls 5, the side walls 4 and the base plate 3 enclose the trough 2 of the present application.

[0023] Furthermore, such as Figure 3 As shown, in some embodiments of the present invention, the retaining wall 5 is provided in three parts, including a first wall 501, a second wall 502 and a third wall 503, wherein the first wall 501 is spaced apart from the side wall 4, the second wall 502 and the third wall 503 are respectively connected to the first retaining wall 501 and the side wall 4, the first wall 501, the second wall 502 and the third wall 503 are fixedly installed on the top of the base plate 3, and the first wall 501, the second wall 502, the third wall 503, the side wall 4 and the base plate 3 enclose to form the trough 2 of the present application.

[0024] It can be observed that during the construction of the underground structure, the foundation slab 3 structure is first formed by the excavation of the foundation pit. The size of the foundation slab 3 determines the size of the entire basement 1 and the trench 2. In this application, the side walls 4 and retaining walls 5 on the foundation slab 3 are selected to form the basement 1 and the trench 2. The foundation slab 3 used to enclose the basement 1 and the foundation slab 3 used to enclose the trench 2 belong to different areas of the same structure. The situation of the foundation slab 3 is explained here to better understand this scheme.

[0025] Furthermore, the outlet of the water inlet pipe (i.e., the pipe that discharges water from the municipal pipe network into the fertilizer tank 2) of the water diversion pipe 11 in this application is set towards the retaining wall 5. Based on the above structure, the water flow during drainage will first flush the retaining wall 5 and then fall into the fertilizer tank 2. The curved water inlet pipe structure with the outlet facing the retaining wall 5 can reduce the noise when the water flows into the fertilizer tank 2 and reduce the impact on the daily life of users in the building.

[0026] Optionally, in some embodiments of the present invention, a water collection well 6 is provided at the edge of the basement 1, and one end of the emergency pipe 7 extends into the water collection well 6. Based on the above structure, the water collection well 6 in the basement 1 can collect the water that seeps into the basement 1 during daily use, ensuring the safety of the building and the dryness of the space; furthermore, one end of the emergency pipe 7 connected to the fertilizer tank 2 extends into the water collection well 6. When the fertilizer tank 2 drains water into the basement 1, the water entering the basement 1 first enters the water collection well 6, which can reduce the water accumulation rate in the basement 1 and promote the early drainage of the water in the basement 1, which is beneficial to improving the service life of the basement 1. Further, the emergency pipe 7 has an inlet pipe and an outlet pipe. The inlet pipe of the emergency pipe 7 is used to drain the water in the fertilizer tank 2 to the water collection well 6. One end of the outlet pipe of the emergency pipe 7 located in the water collection well 6 is connected to a water pump. The other end of the outlet pipe of the emergency pipe 7 can be connected to the fertilizer tank 2 or the municipal pipe network. During daily use, the water in the water collection well 6 can be pumped by the water pump and discharged into the municipal pipe network to ensure the normal use of the water collection well 6.

[0027] Furthermore, such as Figures 4 to 6 As shown, the municipal pipeline network of this embodiment includes a sedimentation tank 12, a municipal sand well 13, and a mud pump 14. One end of the water diversion pipe 11 extends into the sedimentation tank 12 and is connected to the mud pump 14. The sedimentation tank 12 and the municipal sand well 13 are connected by a flap gate 19. Based on the above structure, the sedimentation tank 12 can form a transfer point between the municipal sand well 13 and the sludge tank 2, and settle the water that is about to enter the municipal sand well 13 or the sludge tank 2 to remove silt from the water and improve the drainage effect of the entire pipeline. Furthermore, the sedimentation tank 12 is equipped with a mud pump 14. The outlet pipe of the water diversion pipe 11 (i.e., the pipe that transports water from the sludge tank 2 to the sedimentation tank 12) is connected to the mud pump 14. The mud pump 14 is used to continuously pump the mud in the sludge tank 2 to improve the sludge situation of the sludge tank 2 and ensure the long-term normal use of the sludge tank 2. Of course, to prevent water in the sedimentation tank 12 from flowing back into the sedimentation tank 12 during suction, the inlet pipe of the water supply pipe 11 (i.e., the pipe that supplies water from the sedimentation tank 12 to the fertilizer tank 2) should be closed when the mud pump 14 is used for suction, to prevent the water pumped into the sedimentation tank 12 from flowing back into the fertilizer tank 2 and affecting the suction effect. Obviously, in order to further avoid clogging of the sedimentation tank 12, a maintenance manhole should also be provided on the top plate of the sedimentation tank 12 in this application to ensure timely cleaning of the sedimentation tank 12.

[0028] It can be observed that even with the sedimentation tank 12 located on the ground, land occupation is unavoidable, potentially leading to excessive land use and encroachment on the land boundary of the entire flood control and storage structure. Therefore, to avoid additional land occupation by the sedimentation tank 12, such as... Figure 5As shown, in this embodiment, the sedimentation tank 12 is located within the fertilizer tank 2 and fixedly connected to the retaining wall 5; furthermore, a flap gate 19 is provided on the retaining wall 5 to connect the sedimentation tank to the municipal sand well 13. Based on the above structure, adjusting the position of the sedimentation tank 12 can further optimize the structural design of the flood control and storage structure, reduce land occupation, and improve the utilization effect.

[0029] Optional, such as Figure 1 As shown, in some embodiments of this application, the top of the base plate 3 is provided with a partition wall 15, which is connected to the side wall 4 and the retaining wall 5 respectively. The partition wall 15 is provided with at least two partition walls and divides the fertilizer tank 2 into several adjustment chambers. Each adjustment chamber is provided with a maintenance manhole 8 on its top plate, and each partition wall 15 is provided with a connecting pipe 16 that connects the two adjustment chambers.

[0030] Based on the above structure, the space inside the fertilizer tank 2 is divided into several independent regulating chambers by at least two partition walls 15. Each partition wall 15 is equipped with connecting pipes 16 that connect the regulating chambers on both sides. When water from the municipal pipe network enters the fertilizer tank 2 through the water diversion pipe 11, only a portion of the regulating chambers enters due to the partition walls 15. That is, part of the fertilizer tank 2 is used for water storage at this time, while the other part remains dry to cope with gradually increasing flow. The independent regulating chambers allow operators to activate different areas of the regulating chambers according to the actual municipal pipe network flow and the cleaning status of the existing regulating chambers, avoiding wasted space in the fertilizer tank 2. Furthermore, since each regulating chamber has a maintenance manhole 8 on its top plate, operators can use the manhole 8 to clean and maintain the regulating chambers that are not in a water-storing state, ensuring their normal future use. Obviously, each regulating chamber should also be equipped with various monitoring devices, including water level sensors, to allow operators to continuously monitor the specific conditions inside the fertilizer tank 2.

[0031] It should be further explained that, whether it is the water diversion pipe 11, the emergency pipe 7, or the connecting pipe 16 of this application, they should all have at least one inlet pipe and at least one outlet pipe when they are set up. The setting of inlet and outlet pipes can realize the control of water inflow and outflow simply and efficiently. The setting of multiple inlet pipes and multiple outlet pipes can further enhance the transmission capacity and improve the regulation effect.

[0032] Optional, such as Figure 8As shown, in some embodiments of the present invention, a protective net 10 is provided below the protective cover 9. Obviously, the protective cover 9 is designed to shield the maintenance manhole 8 and prevent personnel from falling in. Therefore, to prevent personnel from accidentally falling in case the protective cover 9 falls or is lost, this application further chooses to provide a protective net 10 below the protective cover 9. The two ends of the protective net are fixed to the side wall 4 and the retaining wall 5 using bolts and traction hooks, effectively preventing substances, including the protective cover 9, from entering the fertilizer tank 2 and the sedimentation tank 12. Furthermore, the protective net 10 of this application is made of polyethylene material, which is inexpensive and easy to promote.

[0033] Furthermore, such as Figure 4 and Figure 5 As shown, in some embodiments of the present invention, the bottom of the base plate 3 is further provided with anti-uplift piles 18 fixedly connected thereto. The anti-uplift piles 18 can counteract the buoyancy of groundwater on the building base plate 3, ensuring structural stability.

[0034] Furthermore, such as Figure 6 As shown, in some embodiments of the present invention, a hydrophobic layer 17 is provided at the bottom of the base plate 3. Generally, the hydrophobic layer 17 is composed of a gravel layer, a drainage pipe, an isolation layer, etc., which can form a drainage channel to guide groundwater or seepage from cracks to the collection well 6, preventing water accumulation or re-seepage. In addition, when cracks or leaks occur in the base plate 3, the hydrophobic layer 17 can also drain the water in time, preventing water from corroding the concrete structure of the building, keeping the base plate 3 dry, and reducing the damage of corrosive substances to the building.

[0035] The embodiments of the present invention also include a flood control method based on an underground space flood control structure, including the following steps: S1, during daily production, the water control pipe 7 is opened to discharge water from the municipal pipe network into the fertilizer tank 2, or the water in the fertilizer tank 2 is discharged into the municipal pipe network to maintain the water level of the fertilizer tank 2. S2. During daily production, open the maintenance manhole 8 regularly to carry out dredging operations on the fertilizer tank 2 and ensure the smooth flow of the water diversion pipeline 7. S3. In the event of extreme flooding, open the water diversion pipe 7 and the emergency pipe 11 to drain the water in the fertilizer tank 2 into the basement 1, and use the space of the basement 1 for emergency water storage to divert the flood peak. S4. After the flood ends, close emergency pipe 7, drain the water from basement 1, and restore normal use of basement 1 and fertilizer tank 2; S5. After the flood ends, inspect and dredge the fertilizer tank 2 and basement 1 to prepare for the next extreme working conditions.

[0036] In summary, this invention provides an underground space flood control and storage structure. During the construction phase of the underground structure, the traditional backfilled drainage trench area is waterproofed to create a water storage space. Simultaneously, emergency pipelines are installed to improve the connection between the drainage trench and the basement. Furthermore, a sedimentation tank is used as an intermediate point to connect the drainage trench to the municipal sand well. The sedimentation tank is mainly used to settle silt and impurities from the municipal pipe network. During basement construction, a tiered water storage space needs to be reserved for emergency replenishment. After the building is completed, using monitoring equipment such as water level sensors and flow meters in the drainage trench and basement, or combining actual drainage and water storage data, temporary water storage is carried out in the drainage trench during heavy rain or other flooding conditions. When the drainage trench is close to saturation, water is introduced into the basement for emergency water storage through emergency pipelines. Based on the water storage and drainage status of the drainage trench and basement, it is determined whether to activate the corresponding space for flood control, achieving tiered water storage, diverting flood peaks, and ultimately improving urban flood control capabilities and saving space resources.

[0037] In addition, this application also provides a method for flood control and storage in underground spaces. Based on the water storage function of the trough, the water control and storage process is optimized. With a low-cost model of zero new land use, a distributed resilient network is formed around the basement, which realizes effective flood control and storage.

[0038] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present invention, and these improvements and substitutions should also be considered within the scope of protection of the present invention.

Claims

1. An underground space flood control and storage structure, characterized in that, Includes a base slab (3) located below ground level, side walls (4) and retaining walls (5), multiple side walls (4) are connected end to end and fixedly installed on the top of the base slab (3), and the multiple side walls (4) and the base slab (3) enclose to form a basement (1); Multiple retaining walls (5) are sequentially connected and fixedly installed on the top of the base plate (3). At least one retaining wall (5) is spaced apart from the side wall (4). Multiple retaining walls (5), the side wall (4), and the base plate (3) enclose a trough (2). An emergency pipe (7) connecting the basement (1) and the fertilizer tank (2) is provided on the side wall (4), and a water diversion pipe (11) connecting the fertilizer tank (2) and the municipal pipe network is provided on the retaining wall (5). The top plate of the fertilizer tank (2) is provided with a maintenance manhole (8), and each maintenance manhole (8) is provided with a protective cover (9).

2. The underground space flood control and storage structure according to claim 1, characterized in that, There are four retaining walls (5), and the four retaining walls (5) are respectively spaced apart from the side wall (4). The four retaining walls (5) are connected end to end in sequence and are all fixedly connected to the base plate (3). The four retaining walls (5), the side wall (4) and the base plate (3) enclose the trough (2).

3. The underground space flood control and storage structure according to claim 1, characterized in that, The retaining wall (5) includes a first wall (501), a second wall (502) and a third wall (503), wherein the first wall (501) is spaced apart from the side wall (4), the second wall (502) and the third wall (503) are respectively connected to the first wall (501) and the side wall (4), the first wall (501), the second wall (502), the third wall (503) and the side wall (4) are all fixedly connected to the base plate (3), and the first wall (501), the second wall (502), the third wall (503), the side wall (4) and the base plate (3) enclose the trough (2).

4. The underground space flood control and storage structure according to claim 1, characterized in that, A water collection well (6) is provided at the edge of the basement (1), and one end of the emergency pipe (7) extends into the water collection well (6).

5. The underground space flood control and storage structure according to claim 1, characterized in that, The municipal pipeline network includes a sedimentation tank (12), a municipal sand well (13), and a mud pump (14). One end of the water diversion pipe (11) extends into the sedimentation tank (12) and is connected to the mud pump (14). The sedimentation tank (12) and the municipal sand well (13) are connected by a flap gate.

6. The underground space flood control and storage structure according to claim 1, characterized in that, The top of the base plate (3) is provided with a partition wall (15), which is connected to the side wall (4) and the retaining wall (5) respectively. There are at least two partition walls (15) that divide the trough (2) into several regulating chambers. Each regulating chamber has a maintenance manhole (8) on its top plate, and each partition wall (15) has a connecting pipe (16) that connects the regulating chambers on both sides.

7. The underground space flood control and storage structure according to claim 1, characterized in that, A protective net (10) is provided below the protective cover (9).

8. The underground space flood control and storage structure according to claim 1, characterized in that, The bottom of the base plate (3) is provided with a hydrophobic layer (17).

9. The underground space flood control and storage structure according to claim 1, characterized in that, The bottom of the base plate (3) is connected to an anti-uplift pile (18).

10. A method for flood control and storage in underground space, employing the underground space flood control and storage structure as described in any one of claims 1-9, characterized in that, Includes the following steps: S1. During daily production, open the water diversion pipe to discharge water from the municipal pipe network into the fertilizer tank, or discharge water from the fertilizer tank into the municipal pipe network to maintain the water level of the fertilizer tank. S2. During daily production, the maintenance manhole should be opened regularly to carry out dredging operations on the fertilizer tank and ensure the smooth flow of water diversion pipelines. S3. In the event of a flood, open the water diversion pipeline and emergency pipeline to drain the water in the fertilizer tank into the basement, and use the basement space for emergency water storage to divert the flood peak. S4. After the flood ends, close the emergency pipeline, drain the water from the basement, and restore the basement and fertilizer tank to normal use; S5. After the flood, inspect and dredge the fertilizer tank and basement to prepare for the next extreme working conditions.

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