Pump station with gate pump overlapped arrangement

Abstract

This invention provides a drainage pumping station with overlapping gate and pump arrangements, relating to the field of drainage technology. The drainage pumping station with overlapping gate and pump arrangements includes a pump house layer structure, a self-drainage channel layer structure, a powerhouse layer structure, an inland river-side gate assembly, and an outer river-side gate assembly; the pump house layer structure, the self-drainage channel layer structure, and the powerhouse layer structure are distributed sequentially from bottom to top; the pump house layer structure has pump channels and pump units arranged corresponding to the pump channels; the self-drainage channel layer structure has self-drainage channels; one end of the pump channels and one end of the self-drainage channels are used to connect to the inland river, and the other end of the pump channels and the other end of the self-drainage channels are used to connect to the outer river; the inland river-side gate assembly is located at the end of the pump channels and the self-drainage channels closest to the inland river, and the outer river-side gate assembly is located at the end of the pump channels and the self-drainage channels closest to the outer river. This invention can reduce the occupied area of ​​the drainage pumping station while taking into account construction costs and reliability requirements, thus improving the applicability of the drainage pumping station.

Description

Technical Field

[0001] This invention relates to the field of drainage technology, and more specifically, to a drainage pumping station with overlapping gates and pumps. Background Technology

[0002] Drainage pumping stations are mainly used in urban flood control and drainage, and drainage of water accumulation in low-lying areas. Their core function is to deal with abnormal rises in inland river water levels caused by heavy rainfall or tidal backwater, and to reduce inland river water levels in a timely manner through gravity drainage or forced drainage, so as to ensure the safety of urban operation and the safety of residents' lives and property.

[0003] Currently, high-flow-rate drainage pumping stations generally adopt a horizontal parallel arrangement of sluice gate channels (i.e., self-draining channels) and pump houses. While this method is technically mature, it requires a large horizontal footprint. The self-draining channels must meet discharge cross-sectional requirements, and the pump houses need sufficient space to accommodate large pump units and pump channels. In addition, a main plant is required to install lifting and control equipment. This layout requires a wide riverbed and hundreds of meters of shoreline, making it highly dependent on land resources and resulting in high construction costs for drainage pumping stations. This problem is particularly prominent in urban built-up areas, where river channels are narrow (commonly ≤50m wide), while the total drainage flow requirement is not less than, for example, 50m³ / s. The banks are densely packed with buildings, underground pipelines are crisscrossed, and demolition compensation is extremely difficult. Under these conditions, the traditional parallel arrangement of drainage pumping stations is often rejected by planning departments because it cannot meet the minimum shoreline requirements, resulting in long-term lag in drainage capacity in many key areas and a continuous accumulation of urban flooding risks. In addition, the pumping station, self-drainage channel and factory building need to be excavated with deep foundation pits, pile foundation construction and large volume concrete pouring respectively. Not only is the project large in scale and long in cycle, but in soft soil foundation or high groundwater level area, the difference in settlement of each foundation can easily cause hidden dangers such as joint leakage and structural cracking, which in turn leads to reliability risks and high construction and application costs of traditional parallel layout of drainage pumping stations. Summary of the Invention

[0004] The present invention aims to address, to some extent, how to reduce the footprint of drainage pumping stations while balancing construction costs and reliability requirements, thereby improving the applicability of drainage pumping stations.

[0005] To at least partially address at least one aspect of the aforementioned problems, the present invention provides a drainage pumping station with overlapping gate and pump arrangements. The drainage pumping station includes a pump house layer structure, a self-drainage channel layer structure, a powerhouse layer structure, an inland river-side gate assembly, and an outer river-side gate assembly. The pump house layer structure, the self-drainage channel layer structure, and the powerhouse layer structure are distributed sequentially from bottom to top. The pump house layer structure is provided with a pump channel and pump units arranged corresponding to the pump channel. The self-drainage channel layer structure is provided with a self-drainage channel. One end of the pump channel and one end of the self-drainage channel are both used to connect to an inland river, and the other end of the pump channel and the other end of the self-drainage channel are both used to connect to an outer river. The inland river-side gate assembly is located at the end of the pump channel and the self-drainage channel closest to the inland river, and the outer river-side gate assembly is located at the end of the pump channel and the self-drainage channel closest to the outer river.

[0006] Optionally, the drainage pumping station with overlapping gates and pumps is also provided with a sand discharge hole. The inlet and outlet ends of the sand discharge hole are used to connect with the inland river and the outer river, respectively. The sand discharge hole is arranged in the gate pier on the side of the water pump channel. The inland river side gate group includes an inland river side maintenance gate for the sand discharge hole. The outer river side gate group includes an outer river side working gate for the sand discharge hole and an outer river side maintenance gate for the sand discharge hole.

[0007] Optionally, the elevation of the bottom inlet of the sand discharge hole is lower than the elevation of the top outlet of the sand discharge hole, the elevation of the bottom inlet of the sand discharge hole is lower than the elevation of the bottom inlet of the water pump channel, and the elevation of the top outlet of the sand discharge hole is lower than the lowest operating water level of the outer river.

[0008] Optionally, the distance between the top of the outlet of the sand discharge hole and the lowest operating water level is greater than or equal to two meters.

[0009] Optionally, the bottom wall structure of the self-draining channel is provided with a first hole, the first hole is located above the water pump unit and extends to the water pump unit, and a sealing cover is provided at the orifice structure at the upper end of the first hole.

[0010] Optionally, the orifice structure at the upper end of the first hole is a first orifice structure, and a first annular waterstop and a first annular drainage groove are provided around the first hole between the sealing cover and the first orifice structure; a plurality of first annular waterstops are arranged in sequence along the radial direction of the first hole, and the first annular drainage groove is provided between two adjacent first annular waterstops; the first annular drainage groove is connected to the drainage system of the pump room layer structure.

[0011] Optionally, the first orifice structure is a first groove structure, the first groove structure having a first surface facing upward and a second surface arranged vertically, the upper end of the second surface having a first inclined surface facing obliquely upward; the plurality of first annular waterstops include a first P-type rubber annular waterstop and a second P-type rubber annular waterstop, both the first P-type rubber annular waterstop and the second P-type rubber annular waterstop are disposed on the sealing cover plate, the first P-type rubber annular waterstop is sealed to the first inclined surface, the second P-type rubber annular waterstop is sealed to the first surface, and the first annular drainage groove is disposed on the first surface and located outside the second P-type rubber annular waterstop.

[0012] Optionally, the drainage pumping station with overlapping gates and pumps is further provided with an electromechanical equipment room and a vertical connecting shaft. The electromechanical equipment room is at least partially located in the pump house floor structure. The vertical connecting shaft is arranged corresponding to the gate pier on the side of the self-drainage channel. The electromechanical equipment room is connected to the vertical connecting shaft. The vertical connecting shaft includes at least one of the following: a hoisting hole, a stairwell, and a ventilation pipe.

[0013] Optionally, the drainage pumping station with overlapping gates and pumps has gate pier structural joints arranged along the longitudinal facade, the gate pier structural joints intersecting with the vertical connecting shaft, and the gate pier structural joints having first water-stop strips at both ends of the vertical connecting shaft; The drainage pumping station with overlapping gate pumps also has concrete construction joints arranged along the horizontal plane, and multiple concrete construction joints are spaced apart in the vertical direction; at least one of the concrete construction joints intersects with the vertical connecting shaft, and each concrete construction joint intersecting with the vertical connecting shaft is provided with a second annular waterstop, which surrounds the corresponding vertical connecting shaft.

[0014] Optionally, the gate pier structural joint extends downward to the pump house layer structure, the bottom end of the gate pier structural joint is located above the top end of the water pump channel and is spaced apart from the top end of the water pump channel by a first preset distance, and the pump house layer structure is integrally cast with the reinforced concrete structure below the gate pier structural joint.

[0015] In the flood drainage pumping station with overlapping gate and pump arrangement of the present invention, the pump house layer structure, the self-drainage channel layer structure, and the powerhouse layer structure are distributed sequentially from bottom to top. The pump house layer structure is the lowest layer, equipped with water pump channels and corresponding water pump units. Forced drainage of the flood drainage pumping station can be achieved by opening and closing the gate groups on the inland river side and the outer river side. The self-drainage channel layer structure is located in the middle layer, equipped with self-drainage channels. Self-drainage of the flood drainage pumping station can be achieved by opening and closing the gate groups on the inland river side and the outer river side. The powerhouse layer structure is located at the top, and supported by the self-drainage channel layer structure, key facilities such as bridge cranes and control equipment can be placed at a safe elevation. This flood drainage pumping station with overlapping gate and pump arrangement can meet the needs of constructing a flood drainage pumping station with a large total drainage capacity in, for example, narrow river channels without increasing the lateral land occupation. Furthermore, this design allows the pump house structure to be deeply buried below the riverbed elevation, providing the structural self-weight and foundation reaction force necessary for the entire station's anti-buoyancy and anti-sliding properties. This also helps to bear and disperse the vibration loads of the pump units during operation and serves as the mechanical foundation for the entire drainage pumping station, supporting the drainage channel and powerhouse structures. Overall, this invention reduces the footprint of the drainage pumping station while balancing construction costs and reliability requirements. It meets the construction needs of drainage pumping stations in narrow areas such as narrow river channels, while ensuring the long-term structural stability and reliability of the pumping station, thus improving its applicability. Attached Figure Description

[0016] Figure 1 A schematic diagram of a drainage pumping station with overlapping gate pumps, as shown in the horizontal elevation of an embodiment of the present invention; Figure 2 for Figure 1 Sectional view of section AA; Figure 3 for Figure 1 Sectional view of section BB; Figure 4 for Figure 1 A sectional view of section C-C; Figure 5 This is a schematic diagram of the structure when the sealing cover is placed over the first hole in an embodiment of the present invention; Figure 6 This is a schematic diagram of the structure of setting a second annular waterstop at the concrete construction joint in an embodiment of the present invention; Figure 7 This is a schematic diagram illustrating the operation mode of a drainage pumping station with overlapping gate pumps in an embodiment of the present invention.

[0017] Explanation of reference numerals in the attached figures: 1-Pump house layer structure; 10-Water pump channel; 11-Water pump unit; 12-Electrical equipment room; 13-Drainage collection well; 14-Horizontal traffic corridor; 15-Drainage pipe; 2-Self-drainage channel layer structure; 20-Self-drainage channel; 21-First hole; 22-First hole structure; 221-First surface; 222-Second surface; 223-First inclined plane; 224-First annular drainage ditch; 23-Hanging hole; 24-Stairwell; 25-Ventilation pipe ; 26-Second hole; 27-Sealing cover plate; 271-First annular waterstop; 2711-First P-type rubber annular waterstop; 2712-Second P-type rubber annular waterstop; 3-Plant building structure; 31-Auxiliary plant; 32-Main plant; 33-Tail gate chamber; 321-Bridge crane; 4-Sand discharge hole; 51-First waterstop; 52-Second annular waterstop; 53-First waterproof surface; 54-Second waterproof surface; 61-Inland river side gate Gate assembly; 611-Inland river side pump channel debris rack and maintenance gate; 612-Inland river side self-drainage channel working gate; 613-Desert discharge hole inland river side maintenance gate; 62-Outer river side gate assembly; 621-Outer river side pump accident maintenance gate; 622-Outer river side self-drainage channel working gate; 623-Outer river side self-drainage channel maintenance gate; 624-Desert discharge hole outer river side working gate; 625-Desert discharge hole outer river side maintenance gate; 71-Inland river water level; 72-Outer river side... River water level; 710 - Real-time water level of inland river; 711 - Highest operating water level of inland river; 712 - Designed operating water level of inland river; 713 - Lowest operating water level of inland river; 720 - Real-time water level of outer river; 721 - Highest operating water level of outer river; 722 - Designed operating water level of outer river; 723 - Lowest operating water level of outer river; 724 - Check flood level of outer river; 81 - Sluice gate pier structural joint; 82 - Concrete construction joint; 821 - First construction joint; 91 - Collection structure. Detailed Implementation

[0018] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0019] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0020] In the description of this specification, the references to terms such as "embodiment," "one embodiment," "some implementations," "exemplary," and "one implementation," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or implementation is included in at least one embodiment or implementation of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or implementation. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or implementations.

[0021] The terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature.

[0022] In the attached figures, the X-axis represents the front-to-back position, with the positive direction of the X-axis (i.e., the direction the arrow points) indicating the front and the negative direction indicating the rear. The Y-axis represents the horizontal direction and is designated as the left-to-right position, with the positive direction of the Y-axis (i.e., the direction the arrow points) indicating the right and the negative direction indicating the left. The Z-axis represents the vertical direction, i.e., the up-down position, with the positive direction of the Z-axis (i.e., the direction the arrow points) indicating up and the negative direction indicating down. It should be noted that the aforementioned representations of the X, Y, and Z axes are merely for the convenience of describing the invention 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 the invention.

[0023] like Figure 1 , 3 As shown in Figures 1 and 4, an embodiment of the present invention provides a drainage pumping station with overlapping gate pumps, which includes a pump house layer structure 1 ( Figure 1 , 3 (4) is schematically outlined with a dotted line; self-draining channel layer structure 2 ( Figure 1 , 3 (4) The factory building structure is schematically outlined with a dashed box. Figure 1 , 3 (4. Schematic outlined with a dashed box) Inland river side gate group 61 ( Figure 3 (Illustrated by dashed boxes) and the outer riverside gate group 62 ( Figure 3(Illustrated with a dashed box in the middle); the pump house layer structure 1, the self-drainage channel layer structure 2, and the plant layer structure 3 are distributed from bottom to top; the pump house layer structure 1 is provided with a water pump channel 10 and a water pump unit 11 arranged corresponding to the water pump channel 10; the self-drainage channel layer structure 2 is provided with a self-drainage channel 20; one end of the water pump channel 10 and one end of the self-drainage channel 20 are used to connect with the inland river, and the other end of the water pump channel 10 and the other end of the self-drainage channel 20 are used to connect with the outer river; the inland river side gate group 61 is located at the end of the water pump channel 10 and the self-drainage channel 20 near the inland river, and the outer river side gate group 62 is located at the end of the water pump channel 10 and the self-drainage channel 20 near the outer river.

[0024] The drainage pumping station with overlapping gate pumps has a three-layer structure. From bottom to top, the three layers are: pump house layer 1, self-drainage channel layer 2, and powerhouse layer 3. The pump house layer 1, self-drainage channel layer 2, and powerhouse layer 3 respectively include pump units 11, self-drainage channels 20, and main powerhouse 32. Based on this, the description of "layer" in this application does not mean that any two adjacent layers in the three-layer structure necessarily have a clear and separable boundary. For example, the main body of the three-layer structure can be made of reinforced concrete, and the bottom wall structure of the self-drainage channel 20 can form the top wall structure of the pump channel 10. This will not be elaborated further.

[0025] The pump house structure 1 is located at the bottom of the three-layer structure. Its core function is to accommodate and support the water pump unit 11, forming a closed and stable water pump channel 10. Typically, a reinforcing structure is poured simultaneously during the construction of the pump house structure 1, forming an integral part with the bottom wall structure of the water pump channel 10. The reinforcing structure constitutes a dedicated base for the water pump unit 11. The water pump unit 11 is fixed to the concrete base at the bottom of the water pump channel 10 by pre-embedded anchor bolts or secondary grouting. The water pump unit 11 is arranged corresponding to the water pump channel 10, and the suction port and discharge port of the water pump unit 11 are located on the flow path of the water pump channel 10.

[0026] Pump house structure 1 serves as the power execution and foundation bearing layer for the entire overlapping gate and pump arrangement of the drainage pumping station. It can be entirely buried below the riverbed elevation of the inland river. It provides the structural self-weight and foundation reaction force required for the entire station to resist buoyancy and sliding. This layer not only bears the vibration load, water thrust, and motor reaction force of the pump unit 11 during operation, but also serves as the mechanical foundation of the entire overlapping gate and pump arrangement of the drainage pumping station. It directly supports the self-drainage channel structure 2 upwards and evenly diffuses all the composite loads transmitted from the upper part downwards.

[0027] The self-drainage channel layer structure 2 is located directly above the pump room layer structure 1. Its core function is to form the self-drainage channel 20. The bottom wall structure of the self-drainage channel 20 constitutes the top wall structure of the pump channel 10. The two can be the same reinforced concrete structure.

[0028] The plant structure 3, located at the top of the three-story structure, serves as the operation control and maintenance support layer for the entire pumping station. Its core function is to house operation and management facilities such as the bridge crane 321. It provides sufficient lifting height and stable support for heavy lifting equipment, enabling on-site hoisting and annual maintenance of large water pump units 11. Furthermore, at least part of the load on the plant structure 3 can be transferred and diffused downwards through the self-drainage channel structure 2 and the pump house structure 1, avoiding the costs and other problems associated with building a separate plant on a narrow shoreline. In addition, the plant structure 3 places the equipment relatively high, reducing the risk of flooding, leakage, and moisture corrosion.

[0029] The inland river side gate assembly 61 is an inlet control unit arranged at the end of the pump channel 10 and the self-drainage channel 20 near the inland river. It consists of several gates, such as the inland river side pump channel trash rack and maintenance gate 611, and the inland river side self-drainage channel working gate 612.

[0030] The outer river side gate group 62 is an outlet control unit arranged at the end of the water pump channel 10 and the self-drainage channel 20 near the outer river. It consists of several gates, such as the outer river side water pump accident maintenance gate 621, the outer river side self-drainage channel working gate 622, and the outer river side self-drainage channel maintenance gate 623.

[0031] Thus, in this embodiment of the drainage pumping station with overlapping gate and pump arrangements, the pump house layer structure 1, the self-drainage channel layer structure 2, and the powerhouse layer structure 3 are distributed sequentially from bottom to top. The pump house layer structure 1 is the lowest layer, equipped with a water pump channel 10 and water pump units 11 arranged corresponding to the water pump channel 10. By opening and closing the gate group 61 on the inland river side and the gate group 62 on the outer river side, forced drainage of the drainage pumping station can be achieved. The self-drainage channel layer structure 2 is located in the middle layer, equipped with a self-drainage channel 20. By opening and closing the gate group 61 on the inland river side and the gate group 62 on the outer river side, self-drainage of the drainage pumping station can be achieved. The powerhouse layer structure 3 is located at the top, supported by the self-drainage channel layer structure 2, and can place key facilities such as the bridge crane 321 and control equipment at a safe elevation. The drainage pumping station of this embodiment can meet the needs of building a drainage pumping station with a large total drainage capacity in, for example, narrow river channels without increasing the lateral land occupation. Furthermore, with this configuration, the pump house structure 1 can be buried deep below the riverbed elevation of the inland river, providing the structural self-weight and foundation reaction force required for the entire station to resist buoyancy and sliding. This is beneficial for bearing and dispersing the vibration load during the operation of the pump unit 11, and can also serve as the mechanical foundation of the entire drainage pumping station, enabling it to support the self-drainage channel structure 2 and the powerhouse structure 3.

[0032] Overall, this embodiment can reduce the area occupied by the drainage pumping station while taking into account the construction cost and reliability requirements. It can not only meet the construction needs of drainage pumping stations in narrow areas such as narrow river channels, but also ensure the structural stability and reliability of the drainage pumping station in long-term operation, thereby improving the applicability of the drainage pumping station.

[0033] like Figure 1 , 3 As shown in Figure 4, optionally, to prevent siltation, the drainage pumping station with overlapping gates and pumps is also equipped with a sand discharge hole 4. The inlet and outlet ends of the sand discharge hole 4 are used to connect with the inland river and the outer river, respectively. The sand discharge hole 4 is arranged in the gate pier on the side of the water pump channel 10. The inland river side gate group 61 includes the sand discharge hole inland river side maintenance gate 613. The outer river side gate group 62 includes the sand discharge hole outer river side working gate 624 and the sand discharge hole outer river side maintenance gate 625.

[0034] Specifically, the gate piers on the side of the water pump channel 10 are gate piers located on the transverse side of the water pump channel 10 (i.e., not in the direction of water flow, but on the left and right sides perpendicular to the direction of water flow) and belong to the self-draining channel layer structure 2. For example, the sand discharge hole 4 is set inside the gate pier between two adjacent water pump channels 10 in the X-axis direction (i.e., between two adjacent water pump units 11 in the X-axis direction).

[0035] The maintenance gate 613 on the inland river side of the desilting hole 4 is located at the end of the desilting hole 4 closest to the inland river. It can be used to cut off the inland river water flow during dredging or maintenance to ensure operational safety. The working gate 624 on the outer river side of the desilting hole is used to control the opening and closing of the desilting hole 4. For example, when the water level 72 of the outer river rises abnormally (such as due to tidal backflow), causing the water level difference between the inland and outer river 72 to be too small or even reversed, the desilting hole 4 may lose its gravity flow, or even experience backflow of sediment from the outer river. Closing the working gate 624 on the outer river side of the desilting hole at this time can prevent ineffective operation or reverse siltation under adverse conditions. The maintenance gate 625 on the outer river side of the desilting hole 4 is located at the end of the desilting hole 4 closest to the outer river and is used to isolate the water flow when equipment maintenance is carried out on the outer river side.

[0036] Thus, by setting the sand discharge hole 4 inside the gate pier of the pump house layer structure 1, it neither occupies additional planar space, nor does it occupy space, but can also achieve stable support by utilizing the gate pier's own structure. In conjunction with the coordinated operation of the dedicated gates on the inland river side and the outer river side, it achieves independent control of the sediment interception and discharge process, avoiding interference with the normal operation of the forced drainage and self-drainage conditions.

[0037] like Figure 3 , 4 As shown, optionally, the elevation of the bottom of the inlet of the sand discharge hole 4 is lower than the elevation of the top of the outlet of the sand discharge hole 4, the elevation of the bottom of the inlet of the sand discharge hole 4 is lower than the elevation of the bottom of the inlet of the water pump channel 10, and the elevation of the top of the outlet of the sand discharge hole 4 is lower than the lowest operating water level of the outer river 723.

[0038] Specifically, the direction of the sand discharge hole 4 is from the side where the inland river is located to the side where the downstream outer river is located, and the sand discharge hole 4 is characterized by a low inlet and a high outlet. For example, at least part of the length of the sand discharge hole 4 is inclined relative to the horizontal plane.

[0039] The inlet of the sand discharge hole 4 is located below the bottom of the forebay, and its bottom elevation is set lower than the bottom of the pump channel 10 inlet. This ensures that settled sediment is collected by gravity and directed into the sand discharge hole 4 before entering the pump channel 10 (a collection structure 91 for collecting settled sediment is provided at the bottom of the forebay). The top elevation of the outlet of the sand discharge hole 4 is lower than the lowest water level that may occur in the outer river during long-term operation, thus ensuring that the outlet of the sand discharge hole 4 is always submerged, forming continuous and stable hydraulic driving conditions. Figure 3 As shown, it schematically illustrates the inland river water level 71 and the outer river water level 72. The inland river water level 71 (framed with a dashed line) may include the real-time inland river water level 710, the highest operating inland river water level 711, the designed operating inland river water level 712, the lowest operating inland river water level 713, etc. The outer river water level 72 (framed with a dashed line) may include the real-time outer river water level 720, the highest operating inland river water level 721, the designed operating inland river water level 722, the lowest operating inland river water level 723, the check flood level 724, etc.

[0040] In this way, the sand discharge hole 4 can automatically intercept and transport sediment by relying on the natural water level difference without additional power, and suppress the sediment accumulation in front of the pump inlet 10, thus ensuring the hydraulic efficiency and structural safety of the pump during long-term operation.

[0041] Optionally, the distance between the top of the outlet of the sand discharge hole 4 and the lowest operating water level is greater than or equal to two meters.

[0042] Specifically, this distance refers to the vertical height difference between the top of the outlet of the sediment discharge hole 4 and the lowest operating water level 723 of the outer river. Its value ensures that the sediment discharge hole 4 maintains a reliable submerged outflow state under various operating water level combinations, preventing cavitation, flow interruption or backflow caused by water level fluctuations leading to outlet exposure.

[0043] In this way, the sand discharge hole 4 can maintain its sand discharge capacity under different hydrological conditions, further improving the adaptability and long-term reliability of the drainage pumping station in the face of complex working conditions.

[0044] like Figure 2 , 3 As shown in Figure 5, optionally, to address the challenges of hoisting and maintaining the water pump unit 11 in this arrangement direction, the bottom wall structure of the self-drainage channel 20 is provided with a first hole 21. The first hole 21 is located above the water pump unit 11 and extends to the water pump unit 11. A sealing cover plate 27 is provided at the orifice structure at the upper end of the first hole 21.

[0045] Specifically, the first hole 21 penetrates the bottom wall of the self-drainage channel layer structure 2 and extends vertically downward to the installation area of ​​the water pump unit 11 in the pump room layer structure 1. For example, the center of the planar projection of the first hole 21 is aligned with the axis of the water pump unit 11. The first hole 21 can be used for the maintenance of the water pump unit 11 and the hoisting of its components. For example, the first hole 21 can be used by a crane to hoist the components of the water pump unit 11.

[0046] The sealing cover 27 is disposed at the orifice structure at the upper end of the first hole 21. The sealing cover 27 is, for example, a heavy steel structure with sufficient rigidity and sealing surface accuracy. The sealing cover 27 is sealed to the orifice structure at the upper end of the first hole 21, so that the first hole 21 can be reliably sealed during non-maintenance periods.

[0047] Thus, the first hole 21 provides a vertical passage for the inspection and maintenance of the water pump unit 11, such as the hoisting of components, while the sealing cover 27 ensures the basic waterproof function of the passage under normal conditions, making it possible to "open without losing airtightness" under overlapping arrangement.

[0048] It should be noted that when the self-drainage channel 20 is provided with a top plate structure, the top plate structure should be provided with a second hole 26 corresponding to each first hole 21. Whether or not the second hole 26 is provided with a cover plate is not a limitation. The first hole 21 and the second hole 26 together form the component hoisting channel of the water pump unit 11.

[0049] like Figure 2 , 5 As shown, optionally, the orifice structure at the upper end of the first hole 21 is a first orifice structure 22. A first annular waterstop 271 and a first annular drainage groove 224 are provided around the first hole 21 between the sealing cover plate 27 and the first orifice structure 22. Multiple first annular waterstops 271 are arranged sequentially along the radial direction of the first hole 21, and the first annular drainage groove 224 is provided between two adjacent first annular waterstops 271. The first annular drainage groove 224 is connected to the drainage system of the pump room layer structure 1.

[0050] Specifically, the first orifice structure 22 is a partial structure set on the upper surface of the bottom wall of the self-drainage channel layer structure 2, used to support and position the sealing cover plate 27. The first annular waterstop 271 is arranged along the circumferential direction of the first hole 21, and multiple first annular waterstops 271 are set one by one in order from the inside to the outside. A first annular drainage ditch 224 is arranged in the annular space between two adjacent first annular waterstops 271. The bottom of the first annular drainage ditch 224 may be provided with a slope to guide the leakage water to collect in the pre-embedded drainage pipe 15. The pre-embedded drainage pipe 15 is a rigid pipe, one end of which is connected to the lowest point of the ditch, and the other end is connected to the drainage system of the pump room layer structure 1, such as the drainage system including the drainage collection well 13 or the drainage corridor.

[0051] Thus, when the self-drainage channel 20 is put into use, the sealing cover 27 is subjected to water pressure. If the first annular waterstop 271 near the edge of the sealing cover 27 (e.g., the first P-type rubber annular waterstop 2711 described later) leaks slightly due to installation, aging, damage, or other reasons, the leaked water is guided into the first drainage ditch and actively drained away (active drainage defense line). If a rare large amount of water seepage occurs or the drain pipe 15 is blocked, the first annular waterstop 271 away from the edge of the sealing cover 27 (e.g., the second P-type rubber annular waterstop 2712 described later) provides a further sealing defense line to prevent water from seeping into the interior of the first hole 21 and ensure waterproof sealing performance.

[0052] like Figure 5 As shown, optionally, the first orifice structure 22 is a first groove structure. The first groove structure has a first surface 221 facing upward and a second surface 222 arranged vertically. The upper end of the second surface 222 has a first inclined surface 223 facing obliquely upward. The plurality of first annular waterstops 271 include a first P-type rubber annular waterstop 2711 and a second P-type rubber annular waterstop 2712. The first P-type rubber annular waterstop 2711 and the second P-type rubber annular waterstop 2712 are both disposed on the sealing cover plate 27. The first P-type rubber annular waterstop 2711 is sealed and connected to the first inclined surface 223. The second P-type rubber annular waterstop 2712 is sealed and connected to the first surface 221. The first annular drainage groove 224 is disposed at the first surface 221 and is located outside the second P-type rubber annular waterstop 2712.

[0053] Specifically, the first groove structure is a recessed structure located on the bottom wall of the self-draining channel layer structure 2. The first groove structure is connected to the first hole 21. The first surface 221 is the bottom surface of the first groove structure, i.e., the horizontal pressure-bearing surface. The second surface 222 is a side wall surface that is perpendicular or approximately perpendicular to the first surface 221. The first inclined surface 223 is a guide surface located at the upper end of the second surface 222. The first P-shaped rubber circumferential waterstop 2711 is located on the sealing cover plate 27, in contact with the first inclined surface 223, and is provided with a preload of, for example, 3mm to 4mm. It utilizes the compression deformation of the P-shaped cross section. The first layer achieves a self-tightening seal; the second P-type rubber circumferential waterstop 2712 is provided on the sealing cover plate 27, placed on the first surface 221, and in contact with the first surface 221. It is provided with a pre-compression amount of, for example, 3mm to 4mm, and generates a sealing force under the downward pressure of the sealing cover plate 27; the first annular drainage groove 224 is located on the first surface 221, outside the second P-type rubber circumferential waterstop 2712, to ensure that it receives water that has seeped through the first P-type rubber circumferential waterstop 2711 and has not been blocked by the second P-type rubber circumferential waterstop 2712.

[0054] Thus, the first groove structure provides differentiated installation interfaces and force directions for the two P-type waterstops: the first P-type rubber circumferential waterstop 2711 supported by the first inclined surface 223 mainly resists shear and eccentric loads, while the second P-type rubber circumferential waterstop 2712 supported by the first surface 221 mainly bears the positive sealing pressure; the two work together and guide the leakage path in an orderly manner through the pre-installed drainage ditch, forming a double sealing defense line to ensure the long-term waterproof performance of the first hole 21 and its connected structures, such as the electromechanical equipment room 12, under complex hydrological and operating conditions.

[0055] like Figure 1-4 As shown, optionally, in order to open up the vertical connection blocked by the self-drainage channel layer structure 2, the drainage pumping station is also provided with an electromechanical equipment room 12 and a vertical connecting shaft. The electromechanical equipment room 12 is at least partially arranged in the pump room layer structure 1. The vertical connecting shaft is arranged corresponding to the gate pier on the side of the self-drainage channel 20. The electromechanical equipment room 12 is connected to the vertical connecting shaft. The vertical connecting shaft includes at least one of the following: a hoisting hole 23, a stairwell 24, and a ventilation pipe 25.

[0056] Specifically, the electromechanical equipment room 12 is used to house the pump control cabinet, frequency converter, relay protection system, and power distribution unit, etc. The entire electromechanical equipment room 12 is located in the pump house layer structure 1, or the main part of the electromechanical equipment room 12 is located in the pump house layer structure 1, and part of it is located in the side gate pier of the self-draining channel 20. The electromechanical equipment room 12 can also be located partly above the pump channel 10 and partly in the side gate pier of the pump channel 10 to shorten the cable path, etc.

[0057] The vertical connecting shaft is a passageway that connects the pump room floor structure 1 vertically to the upper space. The electromechanical equipment room 12 is connected to the vertical connecting shaft, which can meet the corresponding functional requirements. Specifically, the hoisting hole 23 can be used to hoist equipment into or out of the electromechanical equipment room 12, the stairwell 24 ensures personnel passage and emergency evacuation, and the ventilation duct 25 maintains air circulation within the electromechanical equipment room 12. The ventilation duct 25 is usually equipped with a corresponding ventilation system. The stairwell 24 may include stairwells and elevator shafts, etc., which will not be described in detail here.

[0058] Thus, the coordinated arrangement of the electromechanical equipment room 12 and the vertical connecting shaft, based on the sequential distribution of the pump room layer structure 1, the self-drainage channel layer structure 2 and the plant layer structure 3 from bottom to top, can realize the layout of the electromechanical equipment room 12, as well as the needs of hoisting, personnel passage and ventilation in the electromechanical equipment room 12.

[0059] like Figure 1 , 2As shown in Figure 4, the optional drainage pumping station has a gate pier structural joint 81 arranged along the longitudinal facade. The gate pier structural joint 81 intersects with the vertical connecting shaft. The gate pier structural joint 81 is provided with a first waterstop 51 at both ends of the vertical connecting shaft (the first waterstop 51 is located at...). Figure 2 , 4 (Illustrative sign).

[0060] The pier structure joint 81 is an expansion joint installed at the pier to accommodate temperature stress, concrete shrinkage and differential settlement of the foundation. Its extension direction is parallel to the water flow direction, that is, it runs through the pier structure along the longitudinal facade.

[0061] Specifically, the longitudinal elevation is a plane that is roughly parallel to the YZ plane. That is, the gate pier structural joint 81 extends along a plane that is parallel to the YZ plane. The gate pier structural joint 81 intersects with the vertical connecting shaft and forms two intersecting zones in the front-back direction (Y-axis direction). The two intersecting zones extend roughly along the Z-axis direction. The gate pier structural joint 81 is provided with a first waterstop 51 at each of the two intersecting zones.

[0062] The first waterstop 51 may include multiple waterstops, such as a copper waterstop and a rubber waterstop, which will not be described in detail here.

[0063] Thus, when the vertical connecting shaft passes through the gate pier structural joint 81, the gate pier structural joint 81 is provided with a first waterstop 51 at both ends of the vertical connecting shaft, which can form a two-way blockage of the seepage of the gate pier structural joint 81.

[0064] like Figure 6 As shown, optionally, the drainage pumping station also has concrete construction joints 82 arranged along the horizontal plane, and multiple concrete construction joints 82 are spaced apart in the vertical direction; at least one concrete construction joint 82 (corresponding to the first construction joint 821 in the figure) intersects with the vertical connecting shaft, and each concrete construction joint 82 (corresponding to the first construction joint 821 in the figure) intersecting with the vertical connecting shaft is provided with a second annular waterstop 52, and the second annular waterstop 52 is arranged around the corresponding vertical connecting shaft.

[0065] Specifically, the concrete construction joint 82 (corresponding to the first construction joint 821 in the figure) is a horizontal joint formed by the layered pouring process. Its direction is perpendicular to the vertical direction, and the horizontal plane is parallel to the XY plane. Multiple concrete construction joints 82 (corresponding to the first construction joint 821 in the figure) are set at intervals along the vertical direction. At the intersection of each concrete construction joint 82 (corresponding to the first construction joint 821 in the figure) and the vertical connecting shaft, a second annular waterstop 52 is pre-embedded in the concrete outside the shaft to block the possible path of seepage water entering the interior of the vertical connecting shaft along the concrete construction joint 82 (corresponding to the first construction joint 821 in the figure).

[0066] Thus, the first waterstop 51 at the structural joint 81 of the gate pier and the second annular waterstop 52 at the concrete construction joint 82 (corresponding to the first construction joint 821 in the figure) can together form a three-dimensional anti-seepage system for the vertical connecting well, ensuring the waterproofness of the vertical connecting well.

[0067] like Figure 4 As shown, optionally, in order to improve the stress state of the structure under the overlapping arrangement and control the cost, the gate pier structural joint 81 extends downward to the pump room layer structure 1. The bottom end of the gate pier structural joint 81 is located above the top end of the water pump channel 10 and is spaced apart from the top end of the water pump channel 10 by a first preset distance. The pump room layer structure 1 is integrally cast with the reinforced concrete structure below the gate pier structural joint 81.

[0068] Specifically, the gate pier structural joint 81 extends downwards from top to bottom through the drainage channel layer structure 2 and continues into the pump house layer structure 1, but its termination position is higher than the top of the water pump channel 10 by a first preset distance, for example, the first preset distance is greater than or equal to 2.5 meters, or for example, the first preset distance is greater than or equal to 2 meters. Below this termination position, all concrete structures including the bottom plate, side walls, lower part of the gate pier, and related connecting components of the water pump channel 10 are constructed using a one-time continuous casting process, forming an integral bearing base without any structural joints; this bearing base serves as the mechanical base of the drainage pumping station, evenly distributing all loads transmitted from above (water pressure, opening and closing force, plant weight, vibration load), and providing stable support for the vertical connecting shaft.

[0069] Thus, the suspended termination design of the gate pier structural joint 81, while retaining the necessary deformation adaptability of the superstructure, enables the lower part to form a high-rigidity, high-mass, and strong overall load-bearing base, which can improve the structural force transmission path, reduce the internal force and reinforcement requirements of key sections, thereby improving material utilization efficiency and construction economy while ensuring structural safety and operational stability.

[0070] like Figure 4 As shown, optionally, the drainage pumping station may also have a first waterproof surface 53 above the electromechanical equipment room 12 and a second waterproof surface 54 below it.

[0071] In some scenarios, the concrete construction joint 82 includes a second construction joint located above the equipment room 12. This second construction joint has a waterproof structure arranged within a first pre-defined area above the equipment room 12, forming a first waterproof surface 53. The projection of the equipment room 12 in the horizontal plane is covered by the projection of the first pre-defined area in the horizontal plane, thereby reducing the possibility of water seepage into the equipment room 12 through the second construction joint, ventilation duct 25, etc. This second construction joint can be the same concrete construction joint 82 as a certain first construction joint 821.

[0072] In some scenarios, the concrete construction joint 82 includes a third construction joint located below the equipment room 12. Below the vertical connecting shaft, at least adjacent to the third construction joint, a waterproof structure is arranged within a second preset area to form a second waterproof surface 54. The projection of the second preset area in the horizontal plane can cover the projections of the equipment room 12, the vertical connecting shaft, and the first hole 21 in the horizontal plane. This reduces the possibility of water seepage into the equipment room 12 and the vertical connecting shaft via the third construction joint.

[0073] The construction of the first waterproof surface 53 and the second waterproof surface 54 can be achieved using relevant technologies, which will not be described in detail here.

[0074] like Figure 3 , 4 As shown, exemplarily, the powerhouse structure 3 includes a main powerhouse 32, an auxiliary powerhouse 31, and a tailgate chamber 33. The main powerhouse 32 is the core structure of the powerhouse structure 3, housing a bridge crane 321 and its track beams, trolley traveling mechanism, hoisting mechanism, and other complete lifting equipment. The rated lifting capacity of this crane is sufficient to meet the needs of hoisting, rotor replacement, and annual overhaul of the large water pump unit 11. The main powerhouse 32 provides sufficient clearance height and structural support rigidity to ensure that the hoisting path is vertical, stable, and unobstructed. The auxiliary powerhouse 31 can be used to house the central control room, relay protection panel, DC power supply system, communication equipment, video monitoring terminal, and other operation and management facilities. Alternatively, the auxiliary powerhouse 31 can be used to house the inland river side gate assembly 61. The tailgate chamber 33 is located at the downstream end of the powerhouse structure 3 and is used to house the outer river side gate assembly 62.

[0075] Furthermore, the scope of this invention is not limited to this. Other structures can be provided as needed, such as drainage collection wells 13 and horizontal traffic corridors 14, to achieve needs such as water collection and drainage, and connection between various spaces (e.g., the first hole 21 and the electromechanical equipment room 12). These will not be described in detail in this specification.

[0076] The present invention addresses the potential problems of leakage, vibration transmission, and maintenance difficulties caused by the overlapping arrangement of self-draining channels and horizontal channels. It proposes a systematic solution (three-dimensional seepage prevention, first orifice, and efficient sand removal) to ensure the long-term safety, stable operation, and convenient maintenance of the innovative structural form. Furthermore, the suspended termination design of the gate pier structural joint 81 cleverly resolves the structural stress problems caused by the overlapping arrangement. This invention provides a highly versatile and replicable solution for urban renewal, upgrading flood control and drainage standards in old urban areas, and constructing water conservancy projects in new districts with limited space, and has broad prospects for widespread application.

[0077] like Figure 7As shown, it schematically illustrates the operation mode of the drainage pumping station with overlapping gate pumps in an embodiment of the present invention. The drainage pumping station with overlapping gate pumps has forced drainage mode, self-drainage mode, etc., which will not be described in detail here.

[0078] In some scenarios, the total design pumping flow rate of drainage pumping stations with overlapping gate pumps is not less than 50 m³ / s, and the design flow rate of a single pump unit is greater than 7.54 m³ / s.

[0079] The exemplary solution is illustrated by taking a drainage pumping station project with overlapping gates and pumps to meet the 50-year flood discharge standard on a river channel with a width of only 48 meters in the city center as an example. This project had been shelved for a long time due to the inability to resolve the demolition issues.

[0080] Project scale and design parameters: Total drainage flow rate: 100 m³ / s; Pump selection: 4 large vertical axial flow pumps with a single unit flow rate of 25 m³ / s and a head of 7.0 m. The power of each pump is enormous, far exceeding the applicable range of integrated pump gates. Scale of the self-drainage channel layer: 3 openings (3 self-drainage channels), each with a net width of 9 meters to meet flood discharge requirements.

[0081] Implementation of Overlapping Three-Dimensional Structure: ① Vertical Connecting Shaft and Seepage Prevention: A 2.5m×4m vertical connecting shaft is installed at the structural joint of the gate pier, and construction is strictly carried out according to the three-dimensional seepage prevention system of "double waterstop on the joint surface + circumferential waterstop at the construction joint". ② Maintenance Passage Sealing System: A 2.2m×2.2m first hole is opened on the bottom plate of the 1.8m thick self-draining channel. Two P-type rubber waterstops are installed, forming the first annular drainage ditch in the middle and connecting to the DN50 drainage pipe. Custom-made heavy-duty hydraulic sealing cover plates are used. ③ Sand Discharge System: A DN800 sand discharge steel pipe is pre-embedded in the gate pier, with an inlet elevation of -2.5m (water pump channel inlet -1.0m) and an outlet center elevation of -4.0m (lowest operating water level of the outer river -4m). ④ Structural Joint Optimization: The structural joint of the gate pier between the unit sections terminates 2.5 meters above the top of the water pump channel, and the lower part is integrally cast.

[0082] This project has been completed and has been operating safely for several flood seasons, verifying the full feasibility of the present invention.

[0083] While the present invention has been disclosed above, its scope of protection is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, and all such changes and modifications will fall within the scope of protection of the present invention.

Claims

1. A drainage pumping station with overlapping gate pumps, characterized in that, The system includes a pump house layer structure (1), a self-drainage channel layer structure (2), a powerhouse layer structure (3), an inland river side gate group (61), and an outer river side gate group (62); the pump house layer structure (1), the self-drainage channel layer structure (2), and the powerhouse layer structure (3) are distributed sequentially from bottom to top; the pump house layer structure (1) is provided with a water pump channel (10) and a water pump unit (11) arranged corresponding to the water pump channel (10); the self-drainage channel layer structure (2) is provided with a self-drainage channel (20); One end of the pump channel (10) and one end of the self-drainage channel (20) are used to connect with the inland river, and the other end of the pump channel (10) and the other end of the self-drainage channel (20) are used to connect with the outer river. The inland river side gate group (61) is located at the end of the pump channel (10) and the self-drainage channel (20) near the inland river, and the outer river side gate group (62) is located at the end of the pump channel (10) and the self-drainage channel (20) near the outer river.

2. The drainage pumping station with overlapping gate pumps as described in claim 1, characterized in that, The drainage pumping station with overlapping gates and pumps is also equipped with a sand discharge hole (4). The inlet and outlet ends of the sand discharge hole (4) are used to connect with the inland river and the outer river, respectively. The sand discharge hole (4) is arranged in the gate pier on the side of the water pump channel (10). The inland river side gate group (61) includes the sand discharge hole inland river side maintenance gate (613). The outer river side gate group (62) includes the sand discharge hole outer river side working gate (624) and the sand discharge hole outer river side maintenance gate (625).

3. The drainage pumping station with overlapping gate pumps as described in claim 2, characterized in that, The elevation of the bottom inlet of the sand discharge hole (4) is lower than the elevation of the top outlet of the sand discharge hole (4), the elevation of the bottom inlet of the sand discharge hole (4) is lower than the elevation of the bottom inlet of the water pump channel (10), and the elevation of the top outlet of the sand discharge hole (4) is lower than the lowest operating water level (723) of the outer river.

4. The drainage pumping station with overlapping gate pumps as described in claim 3, characterized in that, The distance between the top of the outlet of the sand discharge hole (4) and the lowest operating water level is greater than or equal to two meters.

5. The drainage pumping station with overlapping gate pumps as described in claim 1, characterized in that, The bottom wall structure of the self-drainage channel (20) is provided with a first hole (21). The first hole (21) is located above the water pump unit (11) and extends to the water pump unit (11). A sealing cover plate (27) is provided at the orifice structure at the upper end of the first hole (21).

6. The drainage pumping station with overlapping gate pumps as described in claim 5, characterized in that, The upper end of the first hole (21) has a first hole structure (22). Between the sealing cover plate (27) and the first hole structure (22), there is a first annular waterstop (271) and a first annular drainage ditch (224) surrounding the first hole (21). Multiple first annular waterstops (271) are arranged in sequence along the radial direction of the first hole (21). The first annular drainage ditch (224) is located between two adjacent first annular waterstops (271). The first annular drainage ditch (224) is connected to the drainage system of the pump room layer structure (1).

7. The drainage pumping station with overlapping gate pumps as described in claim 6, characterized in that, The first orifice structure (22) is a first groove structure. The first groove structure has a first surface (221) facing upward and a second surface (222) arranged vertically. The upper end of the second surface (222) has a first inclined surface (223) facing obliquely upward. The plurality of first annular waterstops (271) include a first P-type rubber annular waterstop (2711) and a second P-type rubber annular waterstop (2712). The first P-type rubber annular waterstop (2711) and the second P-type rubber annular waterstop (2712) are both disposed on the sealing cover plate (27). The first P-type rubber annular waterstop (2711) is sealed to the first inclined surface (223). The second P-type rubber annular waterstop (2712) is sealed to the first surface (221). The first annular drainage groove (224) is disposed on the first surface (221) and is located outside the second P-type rubber annular waterstop (2712).

8. The drainage pumping station with overlapping gate pumps as described in claim 1, characterized in that, The drainage pumping station with overlapping gates and pumps is also equipped with an electromechanical equipment room (12) and a vertical connecting shaft. The electromechanical equipment room (12) is at least partially located in the pump house layer structure (1). The vertical connecting shaft corresponds to the gate pier arrangement on the side of the self-drainage channel (20). The electromechanical equipment room (12) is connected to the vertical connecting shaft. The vertical connecting shaft includes at least one of the following: a hoisting hole (23), a stairwell (24), and a ventilation pipe (25).

9. The drainage pumping station with overlapping gate pumps as described in claim 8, characterized in that, The drainage pumping station with overlapping gates and pumps has gate pier structural joints (81) arranged along the longitudinal facade. The gate pier structural joints (81) intersect with the vertical connecting shaft. The gate pier structural joints (81) are provided with first water-stop strips (51) at both ends of the vertical connecting shaft. The drainage pumping station with overlapping gate pumps also has concrete construction joints (82) arranged along the horizontal plane, and multiple concrete construction joints (82) are spaced apart in the vertical direction; at least one concrete construction joint (82) intersects with the vertical connecting shaft, and each concrete construction joint (82) intersecting with the vertical connecting shaft is provided with a second annular waterstop (52), and the second annular waterstop (52) surrounds the corresponding vertical connecting shaft.

10. The drainage pumping station with overlapping gate pumps as described in claim 9, characterized in that, The gate pier structural joint (81) extends downward to the pump room layer structure (1). The bottom end of the gate pier structural joint (81) is located above the top end of the water pump channel (10) and is spaced apart from the top end of the water pump channel (10) by a first preset distance. The pump room layer structure (1) is integrally cast and installed in the reinforced concrete structure below the gate pier structural joint (81).

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