Drainage system and drainage method for deep and large foundation pit

Abstract

The invention discloses a deep and large foundation pit drainage system which comprises a drainage well, a seepage water storage part, a sludge cutting part, a mud-water separation part, a mud collecting part and a mud-water discharge part, a partition plate and a cutting plate are arranged in the seepage water storage part and the sludge cutting part respectively, the diameter of the cutting plate is smaller than that of the drainage well, and the mud-water separation part is arranged in the mud-water separation part. The top of the cutting plate is provided with cutting blades at intervals in the radial direction, the cutting plate and the bottom of the partition plate are each provided with a pair of matched extrusion protrusions so that slurry can pass through a gap between the pair of extrusion protrusions, and the extrusion protrusions on the cutting plate and the cutting blades on the cutting plate are arranged at intervals in the radial direction of the cutting plate. The invention further provides a drainage method based on the deep and large foundation pit drainage system. The mud-water separation efficiency of seepage water of the deep and large foundation pit can be effectively improved, and efficient and stable operation of a drainage system of the deep and large foundation pit is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of foundation pit drainage, and more specifically, to a deep and large foundation pit drainage system and a drainage method. Background Art

[0002] Existing foundation pit drainage systems generally rely on pumps as core equipment to mechanically pump out the seepage water accumulated in the foundation pit, thereby ensuring the safety and stability of the foundation pit construction. However, in actual engineering applications, especially when facing deep and large foundation pits, these seepage water often contains a high proportion of sediment and other impurities. Due to the characteristics of deep and large foundation pits, the groundwater infiltration is more complicated and the water volume is larger. At the same time, due to the geological differences in the soil layer, the mud components carried in the seepage water are also richer, and are often mixed with many large-volume block sludge.

[0003] If these seepage water containing a lot of silt are not effectively separated from the water, or if only simple separation is performed, a series of problems will directly lead to. First, solid impurities such as silt will seriously wear the impeller and seals of the pump, shorten its service life, increase maintenance costs, and may even affect the continuity and stability of the entire foundation pit drainage system due to frequent failures. Secondly, the unseparated mud and water mixture is discharged into the drainage pipe through the drainage ditch. This process is easy to block the drainage pipe and reduce the drainage efficiency. In severe cases, it may cause the drainage system to be paralyzed, posing a huge hidden danger to the construction safety of the foundation pit. In addition, the direct discharge of wastewater containing a lot of silt may also pollute the environment, which does not meet the requirements of modern engineering for environmental protection and sustainability.

[0004] For example, in the invention patent with announcement number CN114991188B, a deep foundation pit drainage structure is disclosed, which includes a foundation pit and a water delivery mechanism. A drainage well is arranged at the bottom end of the foundation pit, and a mud collecting trough is arranged at the bottom end of the drainage well. The upper side of the mud collecting trough is connected to a filter box through a support. The water delivery mechanism includes a mud delivery pipe, and the bottom end of the mud delivery pipe extends to the inner bottom side of the mud collecting well. A support plate is provided in the filter box to support the soil, which not only affects the drainage efficiency, but also the soil on the support plate needs to be washed by water, and the mud and water seeping from the deep foundation pit cannot be separated.

[0005] Therefore, it is particularly important to improve and innovate the mud-water separation technology in deep and large foundation pit drainage systems, aiming to improve the mud-water separation efficiency, protect the pumps and drainage pipes from damage, ensure the efficient and stable operation of the foundation pit drainage system, and meet the relevant environmental protection standards. Summary of the invention

[0006] An object of the present invention is to solve at least the above problems and to provide at least the advantages which will be described hereinafter.

[0007] Another object of the present invention is to provide a deep and large foundation pit drainage system, which can effectively separate the mud and water seepage from the deep and large foundation pit and ensure the efficient and stable operation of the deep and large foundation pit drainage system.

[0008] In order to achieve these purposes and other advantages according to the present invention, the present invention provides a deep large foundation pit drainage system, comprising: A drainage well is arranged in the deep foundation pit, and a grid plate is arranged on the top of the drainage well; A seepage water storage part, which is arranged below the grid plate and includes a partition plate and a sludge collection bin communicating with the grid plate and the partition plate; A sludge cutting part, comprising a cutting plate arranged below the partition, the cutting plate being driven to rotate by a motor arranged in the middle of the grid plate, the motor shaft of the motor sequentially passing through the partition and the cutting plate; a mud-water separation part, comprising an arc-shaped plate disposed below the cutting plate, the arc-shaped plate only allowing water to pass through; The mud collecting part comprises a mud collecting bin arranged below the arc plate and in communication with the arc plate, a stirring shaft is arranged in the mud collecting bin, a plurality of pairs of stirring blades are arranged on the stirring shaft, and the stirring shaft is connected to the motor shaft through a coupling; The mud and water discharge part includes a drainage ditch and a mud discharge trough arranged in a deep and large foundation pit, wherein the drainage ditch is connected to the bottom of the drainage well through a water pump, and the mud discharge trough is connected to the mud collection bin through a mud pump; Among them, the diameter of the cutting plate is smaller than the diameter of the drainage well, and cutting blades are provided at intervals along the radial direction of the top of the cutting plate. A pair of matching extrusion protrusions are respectively provided on the cutting plate and at the bottom of the partition so that the mud can pass through the gaps of the pair of extrusion protrusions. The extrusion protrusions and cutting blades on the cutting plate are spaced apart along the radial direction of the cutting plate.

[0009] Preferably, the deep and large foundation pit drainage system also includes a pair of brush plates, which are respectively connected to both sides of the motor shaft, the bottom of any brush plate is arc-shaped and a steel brush in contact with the arc-shaped plate is provided at the bottom of any brush plate.

[0010] Preferably, the arc plate comprises an arc outer plate, a water filter membrane and an arc inner plate which are arranged in sequence, the arc outer plate and the arc inner plate are respectively provided with drainage holes and seepage holes, and the aperture of the drainage hole is larger than the aperture of the seepage hole.

[0011] Preferably, the mud discharge tanks include three, which are respectively connected to the mud collection bin through a centrifugal mud pump, a rotor mud pump and a screw mud pump.

[0012] Preferably, the stirring blade at the top of the stirring shaft is 15 to 25 cm higher than the opening of the mud collecting bin, and the length of the stirring blade is set so that the end of the stirring blade is located 5 to 8 cm above the arc plate.

[0013] Preferably, a mud moisture content detection sensor is connected to the side wall of the mud collecting bin, a first water level detection sensor and a second water level detection sensor are respectively provided under the drainage well and in the sludge collecting bin, and the water pump, the centrifugal mud pump, the rotor mud pump, the screw mud pump, the first water level detection sensor, the second water level detection sensor, the mud moisture content detection sensor and the motor are all connected to the control end.

[0014] The present invention further claims protection for a drainage method based on the deep and large foundation pit drainage system, comprising: Step 1, setting the speed of the motor to 45-75r / min, when the water level value fed back by the first water level detection sensor reaches its first threshold value, starting the water pump to drain water into the drainage ditch; at the same time, starting different mud pumps according to the mud water content fed back by the mud water content detection sensor; Step 2: If the water level value fed back by the second water level detection sensor reaches its first threshold value, the speed of the motor is adjusted to 76-125 r / min; if the water level value fed back by the second water level detection sensor reaches its second threshold value, the speed of the motor is adjusted to 126-175 r / min; Step 3: If the water level fed back by the first water level detection sensor reaches its second threshold, the motor is turned off for 15 to 45 minutes; Step 4: Repeat steps 1 to 3 until the water level value fed back by the first water level detection sensor is lower than the first threshold value and the water level value fed back by the second water level detection sensor is lower than the first threshold value, then turn off the motor.

[0015] Preferably, the specific operation of starting different mud pumps according to the mud moisture content fed back by the mud moisture content detection sensor is: When the mud moisture content fed back by the mud moisture content detection sensor is greater than or equal to 85%, the centrifugal mud pump is started to discharge mud into the corresponding mud discharge tank; When the mud water content fed back by the mud water content detection sensor is less than 85% but greater than or equal to 70%, the rotor mud pump is started to discharge mud into the corresponding mud discharge tank; When the mud moisture content fed back by the mud moisture content detection sensor is less than 70%, the centrifugal mud pump is started to discharge mud into the corresponding mud discharge tank.

[0016] The present invention has at least the following beneficial effects: First, the deep and large foundation pit drainage system provided by the present invention comprises a drainage well, a seepage water storage part, a sludge cutting part, a sludge-water separation part, a sludge collecting part and a sludge-water discharge part, wherein the drainage well is used to store the seepage water of the deep and large foundation pit, and the stored deep and large foundation pit seepage water is subjected to sludge-water separation and discharged into the sludge discharge trough and the drainage ditch respectively; the seepage water storage part is used to store the seepage water of the deep and large foundation pit and transport it to the sludge cutting part; the sludge cutting part is used to cut and squeeze the large-volume block sludge in the seepage water of the deep and large foundation pit to the sludge-water separation part; the sludge-water separation part is used to separate the sludge-water in the seepage water of the deep and large foundation pit and transport them respectively. to the mud collection part and the bottom of the drainage well; the mud collection part is used to collect the mud separated from the deep and large foundation pit seepage; the mud and water discharge part is used to transport the water separated from the bottom of the drainage well to the drainage ditch, and transport the mud collected by the collection part to the mud discharge trough, which can treat the deep and large foundation pit seepage in a targeted manner, cut and refine the large-volume block sludge carried in the deep and large foundation pit seepage to form a relatively uniform mud, and then further separate the mud and water, and classify and treat and discharge according to the final state of the mud, which not only improves the drainage efficiency of the deep and large foundation pit seepage, but also improves the possibility of subsequent utilization of the deep and large foundation pit seepage; Secondly, the deep and large foundation pit drainage system provided by the present invention can effectively collect and cut the solid impurities and sludge in the deep and large foundation pit seepage water entering the drainage well, through the set seepage storage part and the sludge cutting part. The cutting blade on the cutting plate rotates under the drive of the motor, and can quickly cut the large sludge into smaller particles, which is convenient for subsequent treatment. The partition plate and the cutting plate are respectively provided with adaptive extrusion protrusions, so that the large sludge is further squeezed into smaller particles. This design not only improves the sludge treatment efficiency, but also ensures the unobstructed drainage system, avoids the problem of poor drainage caused by sludge accumulation, and improves the sludge treatment capacity and drainage capacity of the deep and large foundation pit drainage system; Third, the arc plate design adopted in the mud-water separation part of the deep and large foundation pit drainage system provided by the present invention has a unique structure that only allows water to pass through, while the mud is effectively blocked and directed to the mud collection part. This design greatly improves the efficiency of mud-water separation, ensures that the discharged water is clean and meets environmental protection requirements, and also reduces the subsequent treatment costs; Fourthly, in the deep and large foundation pit drainage system provided by the present invention, the drainage ditch is connected to the bottom of the drainage well through a water pump, and the mud discharge tank is connected to the mud collection bin through a mud pump. This design makes the drainage and mud discharge process more flexible and controllable. When necessary, the corresponding pump body can be quickly started to achieve rapid drainage and mud discharge, which improves the response speed and operation convenience of the entire system; Fifth, the drainage method provided by the present invention can intelligently start the water pump to drain water according to the water level information fed back in real time by the first water level detection sensor, effectively avoiding excessive water accumulation in the drainage well and ensuring drainage efficiency; at the same time, the data of the mud moisture content detection sensor is used to accurately control the start of different types of mud pumps (such as centrifugal mud pumps, rotor mud pumps, and screw mud pumps), which helps to carry out targeted treatment according to the moisture content of different muds, and improves the effect and efficiency of mud-water separation; when the second water level detection sensor detects that the water level in the sludge collection bin reaches different thresholds, the system can automatically adjust the speed of the motor, thereby adjusting the stirring intensity of the stirring shaft. This dynamic adjustment mechanism helps to prevent excessive accumulation or drying of sludge, and ensures the continuity and stability of mud treatment.

[0017] Sixth, the drainage method provided by the present invention uses intelligent control and dynamic adjustment. The system can accurately adjust the working status of each device according to actual needs, avoid unnecessary energy consumption and emissions, and promote energy conservation and emission reduction. At the same time, by real-time monitoring of the moisture content of the mud and selecting the most suitable mud pump for operation, it can ensure that the mud is processed in the best state, avoiding the problem of low processing efficiency caused by improper equipment selection. Efficient mud-water separation and mud treatment help to improve the recycling rate of resources. The system can be dynamically adjusted according to different water levels and mud moisture contents, which enhances the adaptability and flexibility of the system, enabling it to cope with complex and changeable foundation pit drainage environments, in line with the concept of sustainable development.

[0018] Other advantages, objectives and features of the present invention will be embodied in part through the following description, and in part will be understood by those skilled in the art through study and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of a deep and large foundation pit drainage system in a technical solution of the present invention; Figure 2 It is a layout diagram of the partition plate and the cutting plate in another technical solution of the present invention; Figure 3 It is a schematic structural diagram of the arc plate and the mud collection bin in another technical solution of the present invention; Figure 4 It is a structural schematic diagram of the arc plate in another technical solution of the present invention; Among them, 1, the first mud discharge trough; 2, the second mud discharge trough; 3, the drainage well; 4, the grid plate; 5, the motor; 6, the motor shaft; 7, the partition; 8, the sludge collection bin; 9, the third mud discharge trough; 10, the drainage ditch; 11, the centrifugal mud pump; 12, the rotor mud pump; 13, the brush plate; 14, the coupling; 15, the stirring shaft; 16, the stirring blade; 17, the mud moisture content detection sensor; 18, the mud collection bin; 19, the water pump; 20, the screw mud pump; 21, the first extrusion protrusion; 22, the second extrusion protrusion; 23, the cutting piece; 24, the arc plate; 241, the arc outer plate; 242, the water seepage hole; 243, the water filter membrane; 244, the arc inner plate; 245, the drainage hole; 25, the cutting plate. DETAILED DESCRIPTION

[0020] The present invention is further described in detail below in conjunction with the accompanying drawings so that those skilled in the art can implement the invention with reference to the description.

[0021] It should be understood that the terms such as “having”, “including” and “comprising” used herein do not exclude the existence or addition of one or more other elements or combinations thereof.

[0022] like Figures 1 to 4 As shown, the present invention provides a deep and large foundation pit drainage system, comprising: A drainage well 3 is arranged in the deep foundation pit, and a grid plate 4 is arranged on the top of the drainage well 3; A seepage storage part, which is arranged below the grid plate, and includes a partition plate 7 and a sludge collection bin 8 communicating with the grid plate 4 and the partition plate 7; The sludge cutting part includes a cutting plate 25 disposed below the partition plate 7, the cutting plate 25 is driven to rotate by a motor 5 disposed in the middle of the grid plate 4, and a motor shaft 6 of the motor 5 passes through the partition plate 7 and the cutting plate 25 in sequence; A mud-water separation part, which includes a curved plate 24 disposed below the cutting plate 25, and the curved plate 24 only allows water to pass through; The mud collecting part includes a mud collecting bin 18 disposed below the arc plate 24 and in communication with the arc plate 24, wherein a stirring shaft 15 is disposed in the mud collecting bin 18, and a plurality of pairs of stirring blades 16 are disposed on the stirring shaft 15, and the stirring shaft 15 is connected to the motor shaft 6 via a coupling 14; The mud and water discharge part includes a drainage ditch 10 and a mud discharge trough arranged in a deep and large foundation pit, wherein the drainage ditch 10 is connected to the bottom of the drainage well 3 through a water pump 19, and the mud discharge trough is connected to the mud collection bin 18 through a mud pump; Among them, the diameter of the cutting plate 25 is smaller than the diameter of the drainage well 3, and the cutting blades 23 are arranged at intervals along the radial direction on the top of the cutting plate 25. A pair of matching extrusion protrusions are respectively arranged on the cutting plate 25 and at the bottom of the partition 7 so that the mud passes through the gap between the pair of extrusion protrusions, wherein the extrusion protrusion at the bottom of the partition 7 is the first extrusion protrusion 21, and the extrusion protrusion on the cutting plate 25 is the second extrusion protrusion 22. The extrusion protrusion and the cutting blades 23 on the cutting plate 25 are arranged at intervals along the radial direction of the cutting plate 25.

[0023] In the above technical scheme, the deep and large foundation pit drainage system includes a drainage well 3, a seepage water storage part, a sludge cutting part, a mud and water separation part, a mud collecting part and a mud and water discharge part, wherein the drainage well 3 is used to store the seepage water of the deep and large foundation pit and to separate the stored deep and large foundation pit seepage water from mud and water and discharge it to the mud discharge trough and the drainage ditch 10 respectively; the seepage water storage part is used to store the seepage water of the deep and large foundation pit and transport it to the sludge cutting part; the sludge cutting part is used to cut and squeeze the large-volume block sludge in the seepage water of the deep and large foundation pit to the mud and water separation part; the mud and water separation part is used to separate the mud and water from the seepage water of the deep and large foundation pit and transport it to the mud collecting part and the bottom of the drainage well 3 respectively; the mud collecting part is used to collect the mud separated from the seepage water of the deep and large foundation pit; the mud and water discharge part is used to transport the water separated from the bottom of the drainage well 3 to the drainage ditch 10, and to transport the mud collected by the collection part to the mud discharge trough, wherein the drainage ditch 10 is connected to the urban drainage pipeline, and the mud discharge trough is a storage tank, and the mud therein needs to be cleaned regularly.

[0024] In the above technical solution, the drainage well 3 is arranged in the deep and large foundation pit, and a plurality of drainage wells 3 are arranged in the deep and large foundation pit. The number of the drainage wells 3 is different according to the geological conditions and water seepage of the deep and large foundation pit. Generally speaking, the more complex the geological conditions or the greater the water seepage, the more drainage wells 3 there are in the deep and large foundation pit. In areas with complex geological conditions but less water seepage, the number of the drainage wells 3 can be appropriately adjusted. A grid plate 4 is arranged on the top of the drainage well 3, and the grid plate 4 is used to filter larger debris; a motor 5 is arranged in the middle of the grid plate 4 and extends into the drainage well 3.

[0025] In the above technical solution, the muddy water collection part is arranged below the grid plate 4, and includes a partition 7 and a sludge collection bin 8. The partition 7 is arranged close to the wall of the drainage well 3. The motor shaft 6 of the motor 5 passes through the partition 7 but does not drive the partition 7 to rotate. Preferably, a protective sleeve is arranged between the partition 7 and the motor shaft 6. There is a gap between the protective sleeve and the motor shaft 6, which does not affect the rotation of the motor shaft 6. The partition 7 is provided with a plurality of sludge channels, and the sludge collection bin 8 is provided with a plurality of corresponding to the number of the sludge channels. Any sludge collection bin 8 is connected to the grid plate 4 and the corresponding sludge channel, and the width of any sludge collection bin 8 gradually decreases from top to bottom, and the tops of the plurality of sludge collection bins 8 just cover all the grids of the grid plate 4.

[0026] In the above technical scheme, the sludge cutting plate 25 includes a cutting plate 25 arranged below the partition 7, the cutting plate 25 is sleeved on the motor shaft 6 and rotates with the motor shaft 6, the diameter of the cutting plate 25 is smaller than the diameter of the drainage well 3, and in the process of the cutting plate 25 rotating with the motor shaft 6, under the action of centrifugal force, the deep and large foundation pit seepage water on the cutting plate 25 falls into the mud and water separation part from the edge of the cutting plate 25, and the top of the cutting plate 25 is provided with cutting blades 23 along its radial interval, which are used to cut the large-volume block sludge in the deep and large foundation pit seepage water, and a pair of matching extrusion protrusions are respectively provided on the cutting plate 25 and the bottom of the partition 7, and the extrusion protrusions and cutting blades 23 on the cutting plate 25 are spaced apart along the radial direction of the cutting plate 25; the mud of the deep and large foundation pit seepage water passes through the gap between the pair of extrusion protrusions to form more uniform mud, and the first extrusion protrusion 21 at the bottom of the partition 7 and the second extrusion protrusion 22 on the cutting plate 25 can be staggered (such as Figure 2 As shown), the arrangement of the partition 7 and the cutting plate 25 is more compact, and the first extrusion protrusion 21 at the bottom of the partition 7 and the second extrusion protrusion 22 on the cutting plate 25 can also be arranged opposite to each other. Regardless of the staggered arrangement or the opposite arrangement, an extrusion space must be set between the first extrusion protrusion 21 and the second extrusion protrusion 22.

[0027] In the above technical solution, the mud-water separation part is arranged below the cutting plate 25, and includes an arc-shaped plate 24 that only allows water to pass through. The edge of the arc-shaped plate 24 is sealed with the edge of the drainage well 3. The seepage water from the deep and large foundation pit forms a relatively uniform mud in the sludge cutting part, and part of the water is separated at the arc-shaped plate 24 and enters the bottom of the drainage well 3. The mud with reduced water content enters the mud collection part.

[0028] In the above technical solution, the mud collecting part is arranged below the arc plate 24, and includes a mud collecting bin 18. A stirring shaft 15 is arranged inside the mud collecting bin 18. A plurality of pairs of stirring blades 16 are arranged on the stirring shaft 15. The stirring shaft 15 is connected to the motor shaft 6 through a coupling 14. The greater the rotation speed of the motor 5, the more mud (relatively uniform) enters the mud-water separation part, and the greater the water content of the mud (more uniform) in the mud collecting bin 18. The smaller the rotation speed of the motor 5, the less mud (relatively uniform) enters the mud-water separation part, and the smaller the water content of the mud (more uniform) in the mud collecting bin 18. This is because the rotation speed of the motor 5 is low, the more solid part of the mud is deposited at the bottom, and the lower the water content.

[0029] In the above technical solution, the mud and water discharge part is arranged in a drainage ditch 10 and a mud discharge trough in a deep and large foundation pit. The drainage ditch 10 is connected to the bottom of the drainage well 3 through a water pump 19, and the mud discharge trough is connected to the mud collection bin 18 through a mud pump.

[0030] In the above technical solution, the deep and large foundation pit drainage system has at least the following beneficial effects: 1. Through the set seepage storage part and sludge cutting part, the system can effectively collect and cut the solid impurities and sludge in the deep and large foundation pit seepage water entering the drainage well 3. The cutting blade 23 on the cutting plate 25 rotates under the drive of the motor 5, and can quickly cut the large sludge into smaller particles for subsequent processing. The partition 7 and the cutting plate 25 are respectively provided with adaptive extrusion protrusions, so that the large sludge is further squeezed into smaller particles. This design not only improves the sludge processing efficiency, but also ensures the unobstructed drainage system, avoids the problem of poor drainage caused by sludge accumulation, and improves the sludge processing capacity and drainage capacity of the deep and large foundation pit drainage system; 2. The mud-water separation part adopts the arc plate 24 design. Its unique structure only allows water to pass through, while the mud is effectively blocked and directed to the mud collection part. This design greatly improves the efficiency of mud-water separation, ensures that the discharged water is clean and meets environmental protection requirements, and also reduces the subsequent treatment costs; 3. The stirring shaft 15 in the mud collection part and the multiple pairs of stirring blades 16 thereon can fully stir the collected mud through the drive of the motor 5 to prevent the mud from settling and solidifying, which is convenient for the subsequent mud treatment and resource utilization. For example, the mud that has been properly treated can be used as part of the building material, realizing the reuse of waste and improving the efficiency of resource utilization; 4. The drainage ditch 10 is connected to the bottom of the drainage well 3 through a water pump 19, and the mud discharge tank is connected to the mud collection bin 18 through a mud pump. This design makes the drainage and mud discharge process more flexible and controllable. When necessary, the corresponding pump body can be quickly started to achieve rapid drainage and mud discharge, which improves the response speed and operation convenience of the entire system.

[0031] 5. The drainage system of the present invention has a compact structure, and the various parts are closely connected and reasonably arranged, saving space.

[0032] like Figure 1 As shown, in one of the technical solutions, the deep and large foundation pit drainage system also includes a pair of brush plates 13, which are respectively connected to the two sides of the motor shaft 6, and the bottom of any brush plate 13 is arc-shaped and a steel brush in contact with the arc plate 24 is provided at the bottom of any brush plate 13. In general, the steel brush can not only prevent the arc plate 24 from being blocked, but also further refine the particles of the sludge. Specifically, by adding brush plates 13 on both sides of the motor shaft 6, and the bottom of the brush plate 13 is designed to be arc-shaped and equipped with steel brushes, which are in close contact with the arc plate 24, this innovative design can effectively remove the mud residue attached to the surface of the arc plate 24. With the continuous operation of the motor 5, the steel brush on the brush plate 13 continuously brushes the arc plate 24, preventing the accumulation and hardening of mud, ensuring the long-term unobstructed flow of the arc plate 24, thereby further improving the efficiency and quality of mud-water separation; the continuous cleaning effect of the brush plate 13 not only maintains the cleanliness of the arc plate 24, but also reduces the corrosion and wear problems caused by mud accumulation. In the long run, this also helps to extend the service life of the entire drainage system and reduce the cost of frequent replacement or maintenance due to component damage; as the curved plate 24 remains clean, the drainage and mud-water separation functions of the system can continue to operate efficiently, avoiding poor drainage or system failures caused by blockage. This design enhances the stability and reliability of the system and ensures the safety and smooth progress of deep and large foundation pits during construction; and the introduction of the brush plate 13 simplifies the maintenance process of the system. Since the curved plate 24 is always kept relatively clean, the need for manual cleaning is reduced, and the labor intensity of maintenance personnel is reduced; by continuously cleaning the curved plate 24, the retention time of mud in the system is reduced, reducing the potential risk of mud pollution to the environment. This design not only meets environmental protection requirements, but also improves the environmental benefits during the construction process, and helps to build a green and sustainable building environment.

[0033] like Figure 3 and Figure 4As shown, in one of the technical solutions, the arc plate 24 includes an arc outer plate 241, a water filter membrane 243 and an arc inner plate 244 which are arranged in sequence. The arc outer plate 241 and the arc inner plate 244 are respectively provided with a drainage hole 245 and a water seepage hole 242, and the aperture of the drainage hole 245 is larger than the aperture of the water seepage hole 242. The water filter membrane 243 is the core component of the arc plate 24. Its unique structure and material can effectively block mud particles and only allow clean water to pass through. With the different aperture designs of the drainage hole 245 and the water seepage hole 242, the system can more accurately achieve mud-water separation, ensure that the discharged water quality is clearer, reduce the workload of subsequent water treatment, and improve environmental protection benefits; the arc outer plate 241 and the arc inner plate 244 respectively serve as protective layers of the water filter membrane 243, which not only provide additional structural strength, but also prevent the water filter membrane 243 from being damaged due to direct exposure to harsh environments (such as mud scouring, chemical corrosion, etc.). This design extends the service life of the water filter membrane 243, while also enhancing the durability and reliability of the entire arc plate 24; the design of the drainage hole 245 having a larger diameter than the seepage hole 242 allows clean water to pass through the arc plate 24 more smoothly, reducing resistance during drainage and improving drainage efficiency. At the same time, this design also helps to balance the drainage rate and mud-water separation effect, ensuring that the system maintains excellent mud-water separation capabilities while operating at a high efficiency; the present invention significantly improves the performance of the entire drainage system by optimizing the design of the arc plate 24. Not only is the drainage efficiency higher and the mud-water separation effect better, but the stability and reliability of the system are also enhanced. This design enables the system to show greater adaptability when dealing with complex and changeable foundation pit drainage environments. like Figure 1 As shown, in one of the technical solutions, the mud discharge troughs include three, namely the first mud discharge trough 1, the second mud discharge trough 2 and the third mud discharge trough 9, and the three mud discharge troughs are connected to the mud collection bin 18 through a centrifugal mud pump 11, a rotor mud pump 12 and a screw mud pump 20 respectively.

[0034] In the above technical solution, the setting of three mud discharge tanks provides more options for the classification and discharge of mud. The combination of three mud discharge tanks and three mud pumps enables the system to flexibly adjust the discharge path and treatment method of the mud according to actual needs. Different types of mud (such as particle size, density, water content, etc.) can be targetedly treated through different discharge tanks, thereby improving the efficiency and quality of mud treatment. At the same time, the three different types of mud pumps (centrifugal mud pump 11, rotor mud pump 12 and screw mud pump 20) have their own characteristics. According to the physical properties of different muds, the most suitable pumping method can be selected, which not only further improves the mud treatment efficiency, but also effectively protects the mud pump, avoids the strike of the entire system caused by the mud pump strike, and reduces the risk of downtime caused by equipment failure. Different types of mud pumps differ in energy consumption and emissions. By selecting a suitable mud pump according to the characteristics of the mud, energy utilization can be optimized and unnecessary energy consumption and emissions can be reduced. At the same time, the setting of three mud discharge troughs also helps to achieve mud classification treatment and resource recovery, further promoting energy conservation, emission reduction and sustainable development.

[0035] like Figure 1 As shown, in one of the technical solutions, the stirring blade 16 at the top of the stirring shaft 15 is 15-25 cm higher than the opening of the mud collection bin 18, and the length of the stirring blade 16 is set so that the end of the stirring blade 16 is located 5-8 cm above the arc plate 24, and the end of the top stirring blade 16 is located 5-8 cm above the arc plate 24, so that during the stirring process, the blade can slightly disturb the mud near the arc plate 24 and help remove the mud residue attached to the arc plate 24. This auxiliary effect complements the design of the brush plate 13, further improving the cleaning efficiency and mud-water separation effect of the arc plate 24; through the precise setting of the stirring blade 16, the mud is effectively stirred and circulated in the collection bin to prevent the mud from solidifying and hardening, thereby ensuring the smoothness of mud discharge and the continuous and efficient operation of the system.

[0036] In one of the technical solutions, the side wall of the mud collection bin 18 is connected to a mud moisture detection sensor 17, a first water level detection sensor and a second water level detection sensor are respectively provided under the drainage well 3 and in the sludge collection bin 8, the water pump 19, the centrifugal sludge pump 11, the rotor sludge pump 12, the screw sludge pump 20, the first water level detection sensor, the second water level detection sensor, the mud moisture detection sensor and the motor 5 are all connected to the control end, the model of the mud moisture detection sensor 17 is SEN8100, and other models of mud moisture detection sensors can also be used on the premise of realizing online detection of mud moisture content, which is convenient for the automation of drainage of the deep and large foundation pit drainage system, and the mud moisture detection sensor 17 can monitor the moisture content of the mud in real time and provide accurate mud status information for the system. The first water level detection sensor and the second water level detection sensor respectively monitor the water level of the drainage well 3 and the sludge collection bin 8 to ensure that the system can operate stably under different working conditions. These sensor data are fed back to the control end in real time, enabling the system to automatically adjust working parameters according to real-time monitoring results, realize intelligent control, and improve processing efficiency and resource utilization.

[0037] In the above technical scheme, in order to better maintain the deep and large foundation pit drainage system provided by the present invention, it is easy to think of setting the grid plate 4, partition plate 7, cutting plate 25, and arc plate 24 to be detachable, and it is also easy to think of detachably connecting the brush plate 13 to the motor shaft 6. The above does not exceed the protection scope of the present invention.

[0038] The present invention further claims protection for a drainage method based on the deep and large foundation pit drainage system, comprising: Step 1, setting the speed of the motor 5 to 45-75r / min, when the water level value fed back by the first water level detection sensor reaches its first threshold value, starting the water pump 19 to drain water into the drainage ditch 10; at the same time, starting different mud pumps according to the mud water content fed back by the mud water content detection sensor; Step 2: If the water level value fed back by the second water level detection sensor reaches its first threshold value, the speed of the motor 5 is adjusted to 76-125 r / min; if the water level value fed back by the second water level detection sensor reaches its second threshold value, the speed of the motor 5 is adjusted to 126-175 r / min; Step 3: If the water level fed back by the first water level detection sensor reaches its second threshold, the motor is turned off for 515-45 minutes; Step 4: Repeat steps 1 to 3 until the water level value fed back by the first water level detection sensor is lower than the first threshold value and the water level value fed back by the second water level detection sensor is lower than the first threshold value, then turn off the motor 5.

[0039] In the above technical solution, according to the water level information fed back in real time by the first water level detection sensor, the system can intelligently start the water pump 19 to drain water, effectively avoiding excessive water accumulation in the drainage well 3 and ensuring drainage efficiency; at the same time, the data of the mud moisture detection sensor is used to accurately control the start of different types of mud pumps (such as centrifugal mud pumps 11, rotor mud pumps 12, and screw mud pumps 20), which helps to carry out targeted treatment according to the moisture content of different muds, thereby improving the effect and efficiency of mud-water separation. When the second water level detection sensor detects that the water level in the sludge collection bin 8 reaches different thresholds, the system can automatically adjust the speed of the motor 5, thereby adjusting the stirring intensity of the stirring shaft 15. This dynamic adjustment mechanism helps to prevent excessive accumulation or drying of sludge and ensures the continuity and stability of mud treatment. When the first water level detection sensor detects that the water level reaches the second threshold, the system can automatically shut down the motor 5 for a period of time, giving priority to drainage, and also helping to prevent the equipment from overheating or overloading due to long-term continuous operation, thereby extending the service life of the motor 5; through intelligent control and dynamic adjustment, the system can accurately adjust the working state of each device according to actual needs, avoiding unnecessary energy consumption and emissions, and promoting energy conservation and emission reduction. At the same time, efficient mud-water separation and mud treatment help to improve the recycling rate of resources. The system can be dynamically adjusted according to different water levels and mud moisture contents, enhancing the adaptability and flexibility of the system, enabling it to cope with complex and changeable foundation pit drainage environments, in line with the concept of sustainable development; finally, the entire system is automatically operated through preset steps, greatly reducing the need for manual intervention and reducing labor costs. At the same time, the intelligent control system makes the system operation more stable and reliable, reducing failures and downtime caused by human operational errors.

[0040] In one of the technical solutions, the specific operation of starting different mud pumps according to the mud moisture content fed back by the mud moisture content detection sensor is as follows: When the mud moisture content fed back by the mud moisture content detection sensor is greater than or equal to 85%, the centrifugal mud pump 11 is started to discharge mud into the corresponding mud discharge tank; When the mud moisture content fed back by the mud moisture content detection sensor is less than 85% but greater than or equal to 70%, the rotor mud pump 12 is started to discharge mud into the corresponding mud discharge tank; When the mud moisture content fed back by the mud moisture content detection sensor is less than 70%, the centrifugal mud pump 11 is started to discharge mud into the corresponding mud discharge tank.

[0041] In the above technical scheme, this precisely controlled mud pumping method can significantly improve the efficiency of mud treatment. By real-time monitoring of the water content of the mud and selecting the most suitable mud pump for operation, it can ensure that the mud is treated in the best state, avoiding the problem of low treatment efficiency caused by improper equipment selection. Especially when treating a large amount of mud, this precise control can greatly shorten the treatment time and improve the overall work efficiency. This operation method helps to save energy and reduce operating costs. Different mud pumps have different energy consumption, and selecting the most suitable mud pump according to the water content of the mud can ensure that energy consumption is reduced as much as possible while meeting the treatment requirements. In this way, it not only reduces energy waste, but also helps to reduce operating costs and improve economic benefits. This operation method also helps to protect the environment and resources. When treating mud, if the water content is too high or too low, it may lead to poor treatment effect and even secondary pollution. By real-time monitoring and adjusting the use of mud pumps, it can ensure that the mud is treated more thoroughly and effectively, thereby reducing pollution to the environment. At the same time, reasonable control of the water content of mud can also help improve the recycling rate of resources and reduce resource waste.

[0042] The number of equipment and processing scale described here are used to simplify the description of the present invention. The application, modification and variation of the deep and large foundation pit drainage system and drainage method of the present invention are obvious to those skilled in the art.

[0043] Although the embodiments of the present invention have been disclosed as above, they are not limited to the applications listed in the specification and the implementation modes, and they can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and the illustrations shown and described herein.

Claims

1. Deep and large foundation pit drainage system, characterized by: include: A drainage well is arranged in the deep foundation pit, and a grid plate is arranged on the top of the drainage well; A seepage water storage part, which is arranged below the grid plate and includes a partition plate and a sludge collection bin communicating with the grid plate and the partition plate; A sludge cutting part, comprising a cutting plate arranged below the partition, the cutting plate being driven to rotate by a motor arranged in the middle of the grid plate, the motor shaft of the motor sequentially passing through the partition and the cutting plate; a mud-water separation part, comprising an arc-shaped plate disposed below the cutting plate, the arc-shaped plate only allowing water to pass through; The mud collecting part comprises a mud collecting bin arranged below the arc plate and in communication with the arc plate, a stirring shaft is arranged in the mud collecting bin, a plurality of pairs of stirring blades are arranged on the stirring shaft, and the stirring shaft is connected to the motor shaft through a coupling; The mud and water discharge part includes a drainage ditch and a mud discharge trough arranged in a deep and large foundation pit, wherein the drainage ditch is connected to the bottom of the drainage well through a water pump, and the mud discharge trough is connected to the mud collection bin through a mud pump; Among them, the diameter of the cutting plate is smaller than the diameter of the drainage well, and cutting blades are provided at intervals along the radial direction of the top of the cutting plate. A pair of matching extrusion protrusions are respectively provided on the cutting plate and at the bottom of the partition so that the mud can pass through the gaps of the pair of extrusion protrusions. The extrusion protrusions and cutting blades on the cutting plate are spaced apart along the radial direction of the cutting plate.

2. The deep foundation pit drainage system according to claim 1, characterized in that: It also includes a pair of brush plates, which are respectively connected to the two sides of the motor shaft. The bottom of any brush plate is arc-shaped and a steel brush in contact with the arc-shaped plate is provided at the bottom of any brush plate.

3. The deep foundation pit drainage system according to claim 2, characterized in that: The arc plate comprises an arc outer plate, a water filter membrane and an arc inner plate which are arranged in sequence. The arc outer plate and the arc inner plate are respectively provided with drainage holes and water seepage holes. The aperture of the drainage hole is larger than that of the water seepage hole.

4. The deep foundation pit drainage system according to claim 3, characterized in that: The mud discharge tanks include three, which are respectively connected with the mud collection bin through a centrifugal mud pump, a rotor mud pump and a screw mud pump.

5. The deep foundation pit drainage system according to claim 4, characterized in that: The stirring blade at the top of the stirring shaft is 15-25 cm higher than the opening of the mud collecting bin, and the length of the stirring blade is set so that the end of the stirring blade is located 5-8 cm above the arc plate.

6. The deep foundation pit drainage system according to claim 5, characterized in that: A mud moisture content detection sensor is connected to the side wall of the mud collecting bin, and a first water level detection sensor and a second water level detection sensor are respectively provided under the drainage well and in the sludge collecting bin, and the water pump, the centrifugal mud pump, the rotor mud pump, the screw mud pump, the first water level detection sensor, the second water level detection sensor, the mud moisture content detection sensor and the motor are all connected to the control end.

7. The drainage method of the deep and large foundation pit drainage system according to claim 6 is characterized in that: include: Step 1, setting the speed of the motor to 45-75r / min, when the water level value fed back by the first water level detection sensor reaches its first threshold value, starting the water pump to drain water into the drainage ditch; at the same time, starting different mud pumps according to the mud water content fed back by the mud water content detection sensor; Step 2: If the water level value fed back by the second water level detection sensor reaches its first threshold value, the speed of the motor is adjusted to 76-125 r / min; if the water level value fed back by the second water level detection sensor reaches its second threshold value, the speed of the motor is adjusted to 126-175 r / min; Step 3: If the water level fed back by the first water level detection sensor reaches its second threshold, the motor is turned off for 15 to 45 minutes; Step 4: Repeat steps 1 to 3 until the water level value fed back by the first water level detection sensor is lower than the first threshold value and the water level value fed back by the second water level detection sensor is lower than the first threshold value, then turn off the motor.

8. The drainage method according to claim 7, characterized in that: The specific operation of starting different mud pumps according to the mud moisture content feedback from the mud moisture detection sensor is as follows: When the mud moisture content fed back by the mud moisture content detection sensor is greater than or equal to 85%, the centrifugal mud pump is started to discharge mud into the corresponding mud discharge tank; When the mud water content fed back by the mud water content detection sensor is less than 85% but greater than or equal to 70%, the rotor mud pump is started to discharge mud into the corresponding mud discharge tank; When the mud moisture content fed back by the mud moisture content detection sensor is less than 70%, the centrifugal mud pump is started to discharge mud into the corresponding mud discharge tank.

Images