A rapid dewatering device for deep foundation pit

Abstract

The present application relates to a kind of deep foundation pit quick precipitation device, including water collecting mechanism, the water collecting mechanism includes the water collecting container with many water-permeable holes in side wall, the inside of the water collecting container is fixedly installed with drainage container in sandwich state, the side wall of the drainage container is provided with many corresponding filter holes, the bottom of the water collecting container is concavely provided with silt sedimentation tank;Submersible pump, set in the bottom of the drainage container, for the water in drainage container is pumped out;Silt pumping mechanism, for the silt in the silt sedimentation tank is pumped out;Electric controller, for the working process of submersible pump, silt pumping mechanism is controlled.The present application can improve water level lowering treatment efficiency, and can improve the cleaning effect of deposited silt.

Description

Technical Field

[0001] This invention relates to the field of deep foundation pit dewatering technology, specifically to a rapid dewatering device for deep foundation pits. Background Technology

[0002] Foundation pit engineering mainly includes the design and construction of the foundation pit support system and earthwork excavation. It is a highly comprehensive and systematic project that requires close cooperation between geotechnical and structural engineering technicians. The foundation pit support system is a temporary structure that is no longer needed after the underground engineering construction is completed. Both foundation pits and foundation trenches are used to build the foundations of buildings. Deep foundation pits refer to projects with an excavation depth exceeding 5 meters (including 5 meters), or projects with particularly complex geological conditions, surrounding environment, and underground pipelines even if the depth does not exceed 5 meters. Water level dewatering is often required during deep foundation pit construction.

[0003] Currently, dewatering in deep foundation pits typically involves submersible pumps. However, these pits generally contain significant amounts of silt. When the silt accumulates to a certain level, it needs to be removed promptly to maintain efficiency and prevent blockages in the pumps. Since the amount of silt is variable, automated silt removal is not possible. Instead, it relies on regular inspections by staff. When a certain level of silt is detected, the pumping mechanism is manually activated. This process is inefficient, wasteful of manpower, and poses safety risks. Furthermore, because the silt settles at the bottom of the pit and the water is often murky, staff cannot accurately assess the amount of silt. Often, the silt is only discovered when the pumps become clogged, making the process cumbersome.

[0004] Therefore, the research objective of this invention is to design a rapid dewatering device for deep foundation pits that can effectively improve the efficiency of water level dewatering treatment and the cleaning effect of deposited silt. Summary of the Invention

[0005] To address the problems existing in the prior art, the present invention provides a rapid dewatering device for deep foundation pits, which can effectively solve the problems existing in the prior art.

[0006] The technical solution of this invention is:

[0007] A rapid dewatering device for deep foundation pits, comprising:

[0008] The water collection mechanism includes a water collection container with numerous permeable holes on its sidewall. The water collection container is pre-embedded and installed on the lower side of the bottom of the deep foundation pit, and a corresponding gravel layer is filled between the water collection container and the deep foundation pit. A drainage container is fixedly installed in a sandwich state on the inner side of the water collection container. Numerous corresponding filter holes are provided on the sidewall of the drainage container. A sludge sedimentation tank is recessed at the bottom of the water collection container.

[0009] A submersible pump is installed at the bottom of the drainage container to pump out the water in the drainage container. The water inlet of the submersible pump is connected to a corresponding filter mechanism, and the water outlet of the submersible pump is connected to a corresponding drain pipe.

[0010] A sludge pumping mechanism is used to pump out the sludge from the sludge settling tank.

[0011] An electrical controller is used to control the working process of the submersible pump and the sludge removal mechanism.

[0012] The sludge pumping mechanism includes a sludge pump and a sludge pumping pipe sealed at the bottom of the drainage container. The bottom end of the sludge pumping pipe is connected to the bottom side of the sludge settling tank, and the upper end of the sludge pumping pipe is connected to the feed end of the sludge pump. The sludge in the sludge settling tank is pumped out by the sludge pump.

[0013] The electrical controller is externally connected to a first laser ranging sensor and a second laser ranging sensor. A first connecting pipe is fixed between the water collection container and the drainage container, and a second connecting pipe is fixed inside the drainage container. A first float and a second float are respectively movably installed inside the first connecting pipe and the second connecting pipe. The first laser ranging sensor and the second laser ranging sensor are respectively installed on the top of the first connecting pipe and the second connecting pipe, and are used to detect the position of the first float and the second float inside the first connecting pipe and the second connecting pipe.

[0014] The distance between the first buoy and the first laser ranging sensor is set as L1, and the distance between the second buoy and the second laser ranging sensor is set as L2. When the second laser ranging sensor detects that L2 ≤ a set value k1, the submersible pump starts to perform dewatering operations. When the second laser ranging sensor detects that the difference between L2 and L1 detected by the first laser ranging sensor is ≥ a set value k2, the sludge pump starts to perform sludge discharge operations. When the second laser ranging sensor detects that L2 ≥ a set value k3, the submersible pump stops operating. When the first laser ranging sensor detects that L1 ≥ a set value k4, the sludge pump stops operating.

[0015] The top of the drainage container is connected to a corresponding connecting plate, and the outer side of the connecting plate is provided with a corresponding snap-fit ​​groove. The drainage container is fastened to the water collection container by the snap-fit ​​groove. A corresponding fixing block is fastened between the top of the water collection container and the drainage container. The fixing block is provided with a snap-fit ​​groove for fastening the water collection container and the drainage container. The sludge pump fixing device is located on the upper part of the fixing block.

[0016] Alternatively, the sludge extraction mechanism includes a lifting auger, and the bottom of the drainage container is provided with an opening that matches the shape of the sludge settling tank. A corresponding baffle plate is fixed upward at the edge of the opening. The feed end of the lifting auger extends along the space between the baffle plates to the lower side of the sludge settling tank, and the discharge end of the lifting auger is inclined outward and connected to a corresponding discharge pipe. The sludge in the sludge settling tank is extracted and discharged through the lifting auger.

[0017] The outer side of the material lifting auger is directionally movable and equipped with a pressing block with the same shape as the opening. The edge of the pressing block is separated from the mudguard. The pressing block includes a metal pressing plate and a third float fixed to the top of the metal pressing plate. The buoyancy of the third float is greater than the weight of the metal pressing plate, and the third float and the metal pressing plate are respectively provided with a number of corresponding drainage holes.

[0018] The electric controller is connected to a third laser ranging sensor, which is fixed on the upper part of the outer side wall of the lifting auger and is used to detect the position of the third float.

[0019] The distance between the third float and the third laser ranging sensor is set to L3. When the third laser ranging sensor detects that L3 ≤ the set value k5, the submersible pump starts to carry out water removal operations. When the third laser ranging sensor detects that L3 does not decrease within 8 seconds, the submersible pump stops and controls the material lifting auger to start to carry out sludge discharge operations. When the third laser ranging sensor detects that L3 ≥ the set value k6, the electric controller controls the material lifting auger to stop.

[0020] The top of the drainage container is connected to a corresponding mounting plate, and the outer side of the mounting plate is provided with a corresponding limiting groove. The drainage container is fastened to the water collection container by cooperating with the limiting groove. A corresponding mounting block is fixedly installed on the upper side of the material lifting auger. The bottom of the mounting block is provided with a corresponding mounting groove. The bottom of the mounting block is fastened between the top of the drainage container and the top of the water collection container by cooperating with the mounting plate through the mounting groove.

[0021] The outer side of the water collection container is arranged in a ring array with several isolation containers having numerous water-permeable holes. The isolation containers are pre-embedded and installed on the lower side of the bottom surface of the deep foundation pit, and a corresponding gravel layer is filled between the isolation containers and the deep foundation pit. The isolation containers are connected to the outer wall of the water collection container through corresponding connecting pipes.

[0022] The filtration mechanism includes a fixed ring plate connected to the water inlet end of the submersible pump. A filter tube with multiple first isolation holes is connected outward from the middle of the fixed ring plate via a threaded connection. A filter cover with multiple second isolation holes is sleeved on the outside of the filter tube. Several corresponding positioning grooves are distributed at equal angles on the inner end of the filter cover. An L-shaped locking block adapted to the positioning groove is detachably installed on the fixed ring plate, and the positioning groove of the filter cover is fixed by the L-shaped locking block.

[0023] Advantages of this invention:

[0024] 1) The water collection mechanism of the present invention consists of a water collection container with a drainage container fixedly installed in a sandwich state inside the water collection container. When water enters the water collection container, it undergoes the first filtration through the gravel layer and the water permeable holes on the water collection container to prevent a large amount of silt from entering the water collection container. The water entering the water collection container is filtered again through the filter holes on the drainage container before entering the drainage container, thereby effectively reducing the mud content of the water entering the drainage container. At this time, the water entering the drainage container is then pumped out by a submersible pump, which can effectively prevent the submersible pump from being blocked, thereby keeping the water level reduction treatment efficiency within a good range.

[0025] 2) The sludge entering the water collection container is effectively deposited between the water collection container and the drainage container due to the obstruction of the filter holes of the drainage container. Since the bottom of the water collection container of the present invention is recessed and equipped with a sludge sedimentation tank, when the sludge has accumulated to a certain extent, the sludge pumping mechanism can be activated to pump out the sludge in the sludge sedimentation tank. This allows the sludge deposited between the water collection container and the drainage container to continuously enter the sludge sedimentation tank and be continuously pumped out, thereby effectively improving the efficiency of water level reduction treatment and the cleaning effect of the deposited sludge.

[0026] 3) The sludge pumping mechanism of the present invention includes a sludge pump and a sludge pumping pipe sealed and installed at the bottom of the drainage container, the bottom end of which is connected to the bottom side of the sludge settling tank. Based on this, the present invention further includes a first connecting pipe, a second connecting pipe, a first float, a second float, a first laser ranging sensor, and a second laser ranging sensor, thereby effectively monitoring the water level in the collection container and the drainage container in real time.

[0027] When the distance L2 between the second float and the second laser rangefinder is less than or equal to the set value k1, that is, when the water level in the drainage container reaches a certain value, the submersible pump is controlled to start to carry out the water reduction operation.

[0028] When the difference between the distance L2 between the second float and the second laser ranging sensor detected by the second laser ranging sensor and the distance L1 between the first float and the first laser ranging sensor detected by the first laser ranging sensor is greater than or equal to the set value k2, that is, when the water level between the layers of the water collection container and the drainage container is higher than the water level in the drainage container by a certain value, it indicates that the amount of sludge deposited between the layers of the water collection container and the drainage container has reached a certain level. Therefore, some filter holes are blocked, preventing the water between the layers of the water collection container and the drainage container from being discharged into the drainage container in a timely manner, resulting in a height difference greater than or equal to the set value k2. At this time, the sludge pump starts, and the sludge deposited between the layers of the water collection container and the drainage container is pumped out in a reasonable manner. This achieves precise and automated control of water level dewatering and sludge cleaning, reducing labor costs and the safety hazards of manual inspection, and further effectively improving the efficiency of water level dewatering and the cleaning effect of deposited sludge.

[0029] 4) The first laser ranging sensor, the second laser ranging sensor, the first float, and the second float of the present invention are respectively placed inside the first connecting pipe and the second connecting pipe. Therefore, the measuring heads of the first laser ranging sensor and the second laser ranging sensor can be effectively prevented from being contaminated or damaged during use, thereby effectively ensuring the practical effect of the present invention.

[0030] 5) The sludge pumping mechanism of the present invention includes a lifting auger, the feed end of which extends along the space between the baffles to the lower side of the sludge settling tank. Furthermore, the present invention further includes a pressing block composed of a metal pressing plate and a third float, which is directionally movable on the outside of the lifting auger, as well as a third laser ranging sensor.

[0031] When the distance L3 between the third float and the third laser rangefinder is less than or equal to the set value k5, that is, when the water level in the drainage container reaches a certain value, the submersible pump is controlled to start to carry out the water reduction operation.

[0032] When the distance L3 between the third float and the third laser ranging sensor, as detected by the third laser ranging sensor, no longer decreases within 8 seconds, it indicates that the water level has dropped to the point where the metal pressing plate of the pressing block is located on the upper surface of the sludge deposited in the sludge settling tank. At this time, the auger is activated, allowing for the proper pumping and removal of the sludge deposited in the sludge settling tank. This achieves precise and automated control of water level reduction and sludge cleaning, reducing labor costs and safety hazards associated with manual inspections, and further effectively improving the efficiency of water level reduction and the cleaning effect on deposited sludge.

[0033] 6) The third float and the metal pressure plate of the present invention are respectively provided with a number of corresponding drainage holes. During the sludge pumping operation, the pressure block can also squeeze and filter the deposited sludge to squeeze out a portion of the water in the deposited sludge, thereby ensuring the degree of sludge compression, so as to facilitate the pumping effect of the lifting auger on the deposited sludge, thereby further ensuring the practical effect of the present invention. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present invention.

[0035] Figure 2 This is a usage state diagram of Embodiment 1 of the present invention.

[0036] Figure 3 This is a schematic diagram of the water collection container in Example 1.

[0037] Figure 4 This is a schematic diagram of the drainage container in Example 1.

[0038] Figure 5 This is a schematic diagram of the sludge pumping mechanism in Example 1.

[0039] Figure 6 This is a schematic diagram of a structure in which a first float is installed inside the first connecting pipe.

[0040] Figure 7 This is a schematic diagram of a structure in which a second float is installed inside a second connecting pipe.

[0041] Figure 8 This is a schematic diagram of a submersible pump.

[0042] Figure 9 This is a schematic diagram of the structure of Embodiment 2 of the present invention.

[0043] Figure 10 This is a usage diagram of Embodiment 2 of the present invention.

[0044] Figure 11 This is a schematic diagram of the water collection container in Example 2.

[0045] Figure 12 This is a schematic diagram of the drainage container in Example 2.

[0046] Figure 13 This is a schematic diagram of the sludge pumping mechanism in Example 2. Detailed Implementation

[0047] To facilitate understanding by those skilled in the art, the structure of the present invention will now be described in further detail with reference to the accompanying drawings:

[0048] Example 1:

[0049] Please refer to Figure 1-8 A rapid dewatering device for deep foundation pits, comprising:

[0050] The water collection mechanism 1 includes a water collection container 101 with a plurality of permeable holes on its side wall. The water collection container 101 is pre-embedded and installed on the lower side of the bottom surface of the deep foundation pit 2, and a corresponding gravel layer is filled between the water collection container 101 and the deep foundation pit 2. A drainage container 102 is fixedly installed in a sandwich state on the inner side of the water collection container 101. A plurality of corresponding filter holes are provided on the side wall of the drainage container 102. The diameter of the filter holes on the drainage container 102 is smaller than the permeable holes on the water collection container 101. A sludge sedimentation tank 3 is recessed at the bottom of the water collection container 101.

[0051] A submersible pump 4 is located at the bottom of the drainage container 102 and is used to pump out the water in the drainage container 102. The water inlet of the submersible pump 4 is connected to a corresponding filter mechanism 5, and the water outlet of the submersible pump 4 is connected to a corresponding drain pipe 6.

[0052] The sludge pumping mechanism 7 is used to pump out the sludge in the sludge settling tank 3;

[0053] The electrical controller 8 is used to control the working process of the submersible pump 4 and the sludge pumping mechanism 7.

[0054] The sludge pumping mechanism 7 includes a sludge pump 701 and a sludge pumping pipe 702 sealed and installed at the bottom of the drainage container 102. The bottom end of the sludge pumping pipe 702 is connected to the bottom side of the sludge settling tank 3, and the upper end of the sludge pumping pipe 702 is connected to the feed end of the sludge pump 701. The sludge in the sludge settling tank 3 is pumped out by the sludge pump 701.

[0055] The electrical controller 8 is externally connected to a first laser ranging sensor 9 and a second laser ranging sensor 10. A first connecting pipe 11 is fixed between the water collection container 101 and the drainage container 102. A second connecting pipe 12 is fixed inside the drainage container 102. A first float 13 and a second float 14 are movably installed inside the first connecting pipe 11 and the second connecting pipe 12, respectively. The first laser ranging sensor 9 and the second laser ranging sensor 10 are respectively installed on the top of the first connecting pipe 11 and the second connecting pipe 12 to detect the position of the first float 13 and the second float 14 inside the first connecting pipe 11 and the second connecting pipe 12.

[0056] The distance between the first float 13 and the first laser rangefinder 9 is set as L1, and the distance between the second float 14 and the second laser rangefinder 10 is set as L2. When the second laser rangefinder 10 detects that L2 ≤ the set value k1, the submersible pump 4 starts to carry out water removal operations. When the second laser rangefinder 10 detects that the difference between L2 and L1 detected by the first laser rangefinder 9 is ≥ the set value k2, the sludge pump 701 starts to carry out sludge discharge operations. When the second laser rangefinder 10 detects that L2 ≥ the set value k3, the submersible pump 4 stops operating. When the first laser rangefinder 9 detects that L1 ≥ the set value k4, the sludge pump 701 stops operating.

[0057] The top of the drainage container 102 is connected to a corresponding connecting plate 15. The outer side of the connecting plate 15 is provided with a corresponding snap-fit ​​groove 16. The drainage container 102 is fastened to the water collection container 101 by the snap-fit ​​groove 16. A corresponding fixing block 17 is fastened between the top of the water collection container 101 and the top of the drainage container 102. The fixing block 17 is provided with a snap-fit ​​groove 18 for fastening the water collection container 101 and the drainage container 102. The sludge pump 701 is fixedly mounted on the upper part of the fixing block 17.

[0058] When the distance L2 between the second float 14 and the second laser rangefinder 10 detected by the second laser rangefinder 10 is less than or equal to the set value k1, that is, when the water level in the drainage container 102 reaches a certain value, the submersible pump is controlled to start to carry out dewatering operations; when the difference between the distance L2 between the second float 14 and the second laser rangefinder 10 detected by the second laser rangefinder 10 and the distance L1 between the first float 13 and the first laser rangefinder 9 detected by the first laser rangefinder 9 is greater than or equal to the set value k2, that is, when the water level in the drainage container 102 reaches a certain value, the submersible pump is controlled to start to carry out dewatering operations; When the water level between the collection container 101 and the drainage container 102 is higher than the water level inside the drainage container 102 by a certain value, it indicates that the amount of sludge deposited between the collection container 101 and the drainage container 102 has reached a certain level. As a result, some filter holes are blocked, preventing the water between the collection container 101 and the drainage container 102 from being discharged into the drainage container 102 in a timely manner. This leads to a height difference ≥ the set value k2. At this point, the sludge pump 701 starts, allowing for the proper pumping of the sludge deposited between the collection container 101 and the drainage container 102. This achieves precise and automated control of water level dewatering and sludge removal, reducing labor costs and the safety hazards of manual inspections, and further improving the efficiency of water level dewatering and the cleaning effect of deposited sludge.

[0059] The outer side of the water collection container 101 is arranged in a circular array with several isolation containers 27, each equipped with numerous permeable holes. These isolation containers 27 are pre-embedded and installed below the bottom surface of the deep foundation pit 2, with a corresponding gravel layer filling the space between the isolation containers 27 and the deep foundation pit. The isolation containers 27 are connected to the outer wall of the water collection container 101 via corresponding connecting pipes 28. The distribution and arrangement of the isolation containers 27 effectively improves the overall water level reduction efficiency of the deep foundation pit.

[0060] The filtration mechanism 5 includes a fixed ring plate 501 connected to the water inlet end of the submersible pump 4. The middle part of the fixed ring plate 501 is connected to a filter tube 502 with a plurality of first isolation holes through a threaded connection. The outer side of the filter tube 502 is fitted with a filter cover 503 with a plurality of second isolation holes. The diameter of the first isolation holes is smaller than the diameter of the second isolation holes. The inner end of the filter cover 503 is provided with a plurality of corresponding positioning grooves 5031 distributed at equal angles. An L-shaped locking block 29 adapted to the positioning grooves 5031 is detachably installed on the fixed ring plate 501, and the positioning grooves 5031 of the filter cover 503 are fixed by the L-shaped locking block 29.

[0061] In this embodiment, the L-shaped locking block 29 is detachably installed onto the fixing ring plate 501 by means of screws. After a relatively long period of time, the L-shaped locking block 29 can be removed using appropriate tools, thereby removing the filter cover 503 to remove the silt or impurities stored between the filter cover 503 and the filter tube 502, which is very convenient.

[0062] Example 2:

[0063] Please refer to Figure 9-13 The difference between this embodiment and Embodiment 1 is that: the sludge pumping mechanism 7 includes a lifting auger 703, the bottom of the drainage container 102 is provided with an opening that is consistent with the shape of the sludge settling tank 3, and a corresponding baffle plate 19 is fixed upward at the edge of the opening; the feed end of the lifting auger 703 extends along the baffle plates 19 to the lower side of the sludge settling tank 3, and the discharge end of the lifting auger 703 is inclined outward and connected to a corresponding discharge pipe 704, so that the sludge in the sludge settling tank 3 can be pumped out through the lifting auger 703.

[0064] The outer side of the lifting auger 703 is movably mounted with a pressing block 20 whose shape is consistent with the opening. The edge of the pressing block 20 is separated from the mudguard 19. The pressing block 20 includes a metal pressing plate 2001 and a third float 2002 fixed to the top of the metal pressing plate 2001. The buoyancy of the third float 2002 is greater than the weight of the metal pressing plate 2001. The third float 2002 and the metal pressing plate 2001 are respectively provided with a number of corresponding drainage holes 21.

[0065] In this embodiment, a corresponding guide flange is fixedly connected to the outer wall of the lifting auger 703, and the pressing block 20 is provided with a sliding groove that cooperates with the guide flange. The pressing block 20 can be directionally moved and installed on the outside of the lifting auger 703 by the cooperation of the sliding groove with the guide flange.

[0066] The electric controller 8 is connected to a third laser rangefinder 22, which is fixed on the upper part of the outer side wall of the lifting auger 703 and is used to detect the position of the third float 2002.

[0067] The distance between the third float 2002 and the third laser ranging sensor 22 is set to L3. When the third laser ranging sensor 22 detects that L3 ≤ the set value k5, the submersible pump 4 is started to carry out water removal operations. When the third laser ranging sensor 22 detects that L3 does not decrease within 8 seconds, the submersible pump 4 is stopped and the lifting auger 703 is started to carry out sludge discharge operations. When the third laser ranging sensor 22 detects that L3 ≥ the set value k6, the electric controller 8 controls the lifting auger 703 to stop.

[0068] The top of the drainage container 102 is connected to a corresponding mounting plate 23. The outer side of the mounting plate 23 is provided with a corresponding limiting groove 24. The drainage container 102 is fastened to the water collection container 101 by cooperating with the limiting groove 24. A corresponding mounting block 25 is fixedly installed on the upper side of the material lifting auger 703. The bottom of the mounting block 25 is provided with a corresponding mounting groove 26. The bottom of the mounting block 25 is fastened between the top of the drainage container 102 and the top of the water collection container 101 by cooperating with the mounting plate 23 through the mounting groove 26.

[0069] When the distance L3 between the third float 2002 and the third laser rangefinder 22 is less than or equal to the set value k5, that is, when the water level in the drainage container 102 reaches a certain value, the submersible pump 4 is controlled to start to carry out the water reduction operation.

[0070] When the distance L3 between the third float 2002 and the third laser ranging sensor 22, detected by the third laser ranging sensor 22, no longer decreases within 8 seconds, it indicates that the water level has dropped to the point where the metal pressing plate 2001 of the pressing block 20 is located on the upper surface of the sludge deposited in the sludge settling tank 3. At this time, the lifting auger 703 is activated, and the sludge deposited in the sludge settling tank 3 can be effectively pumped out. This achieves precise and automated control of water level reduction and sludge cleaning, reducing labor costs and safety hazards associated with manual inspections, and further effectively improving the efficiency of water level reduction and the cleaning effect on the deposited sludge.

[0071] It should be noted that this embodiment is implemented in the same way as the first embodiment in terms of principle and technical effect. For the sake of brevity, any parts not mentioned in this embodiment can be referred to the corresponding content in the first embodiment.

[0072] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A rapid dewatering device for deep foundation pits, characterized in that: include The water collection mechanism (1) includes a water collection container (101) with a plurality of permeable holes on its side wall. The water collection container (101) is pre-embedded and installed on the lower side of the bottom surface of the deep foundation pit (2). A corresponding gravel layer is filled between the water collection container (101) and the deep foundation pit (2). A drainage container (102) is fixedly installed in a sandwich state on the inner side of the water collection container (101). A plurality of corresponding filter holes are provided on the side wall of the drainage container (102). A sludge sedimentation tank (3) is recessed at the bottom of the water collection container (101). A submersible pump (4) is installed at the bottom of the drainage container (102) for pumping water out of the drainage container (102). The inlet end of the submersible pump (4) is connected to a corresponding filter mechanism (5), and the outlet end of the submersible pump (4) is connected to a corresponding drain pipe (6). The sludge pumping mechanism (7) is used to pump out the sludge in the sludge settling tank (3); An electrical controller (8) is used to control the working process of the submersible pump (4) and the sludge pumping mechanism (7); The sludge pumping mechanism (7) includes a lifting auger (703). The bottom of the drainage container (102) is provided with an opening that is consistent with the shape of the sludge settling tank (3). A corresponding baffle plate (19) is fixed upward at the edge of the opening. The feed end of the lifting auger (703) extends along the baffle plate (19) to the lower side of the sludge settling tank (3). The discharge end of the lifting auger (703) is inclined outward and connected to a corresponding discharge pipe (704). The sludge in the sludge settling tank (3) is pumped out through the lifting auger (703). The outer side of the lifting auger (703) is directionally movable and equipped with a pressing block (20) with the same shape as the opening. The edge of the pressing block (20) is separated from the mudguard (19). The pressing block (20) includes a metal pressing plate (2001) and a third float (2002) fixed to the top of the metal pressing plate (2001). The buoyancy of the third float (2002) is greater than the weight of the metal pressing plate (2001). The third float (2002) and the metal pressing plate (2001) are respectively provided with a number of corresponding drainage holes (21).

2. The rapid dewatering device for deep foundation pits according to claim 1, characterized in that: The sludge pumping mechanism (7) includes a sludge pump (701) and a sludge pumping pipe (702) sealed and installed at the bottom of the drainage container (102). The bottom end of the sludge pumping pipe (702) is connected to the bottom side of the sludge settling tank (3), and the upper end of the sludge pumping pipe (702) is connected to the feed end of the sludge pump (701). The sludge in the sludge settling tank (3) is pumped out by the sludge pump (701).

3. The rapid dewatering device for deep foundation pits according to claim 2, characterized in that: The electric controller (8) is externally connected to a first laser ranging sensor (9) and a second laser ranging sensor (10). A first connecting pipe (11) is fixed between the water collection container (101) and the drainage container (102). A second connecting pipe (12) is fixed inside the drainage container (102). A first float (13) and a second float (14) are respectively movably installed inside the first connecting pipe (11) and the second connecting pipe (12). The first laser ranging sensor (9) and the second laser ranging sensor (10) are respectively installed on the top of the first connecting pipe (11) and the second connecting pipe (12) to detect the position of the first float (13) and the second float (14) inside the first connecting pipe (11) and the second connecting pipe (12). The distance between the first float (13) and the first laser ranging sensor (9) is set as L1, and the distance between the second float (14) and the second laser ranging sensor (10) is set as L2. When the second laser ranging sensor (10) detects that L2 ≤ set value k1, the submersible pump (4) is started to carry out water removal operations. When the second laser ranging sensor (10) detects that the difference between L2 and L1 detected by the first laser ranging sensor (9) is ≥ set value k2, the sludge pump (701) is started to carry out sludge discharge operations. When the second laser ranging sensor (10) detects that L2 ≥ set value k3, the submersible pump (4) is stopped. When the first laser ranging sensor (9) detects that L1 ≥ set value k4, the sludge pump (701) is stopped.

4. The rapid dewatering device for deep foundation pits according to claim 3, characterized in that: The top of the drainage container (102) is connected to a corresponding connecting plate (15), and the outer side of the connecting plate (15) is provided with a corresponding snap-fit ​​groove (16). The drainage container (102) is fastened to the water collection container (101) by the snap-fit ​​groove (16) cooperating with the water collection container (101). A corresponding fixing block (17) is fastened between the top of the water collection container (101) and the drainage container (102). The fixing block (17) is provided with a snap-fit ​​groove (18) for fastening the water collection container (101) and the drainage container (102). The sludge pump (701) is fixed on the upper part of the fixing block (17).

5. The rapid dewatering device for deep foundation pits according to claim 1, characterized in that: The electric controller (8) is connected to a third laser ranging sensor (22), which is fixed on the upper part of the outer side wall of the lifting auger (703) and is used to detect the position of the third float (2002). The distance between the third float (2002) and the third laser rangefinder (22) is set to L3. When the third laser rangefinder (22) detects that L3 ≤ set value k5, the submersible pump (4) is started to carry out water removal operation. When the third laser rangefinder (22) detects that L3 does not decrease within 8s, the submersible pump (4) is stopped and the material lifting auger (703) is started to carry out sludge discharge operation. When the third laser rangefinder (22) detects that L3 ≥ set value k6, the electric controller (8) controls the material lifting auger (703) to stop.

6. The rapid dewatering device for deep foundation pits according to claim 5, characterized in that: The top of the drainage container (102) is connected to a corresponding mounting plate (23), and the outer side of the mounting plate (23) is provided with a corresponding limiting groove (24). The drainage container (102) is fastened to the water collection container (101) by the cooperation of the limiting groove (24). A corresponding mounting block (25) is fixedly installed on the upper side of the lifting auger (703). The bottom of the mounting block (25) is provided with a corresponding mounting groove (26). The bottom of the mounting block (25) is fastened between the top of the drainage container (102) and the water collection container (101) by the cooperation of the mounting groove (26) and the mounting plate (23).

7. The rapid dewatering device for deep foundation pits according to claim 1, characterized in that: The outer side of the water collection container (101) is arranged in a ring array with several isolation containers (27) having numerous water-permeable holes. The isolation containers (27) are pre-embedded and installed on the lower side of the bottom surface of the deep foundation pit (2). The space between the isolation containers (27) and the deep foundation pit is filled with a corresponding gravel layer. The isolation containers (27) are connected to the outer wall of the water collection container (101) through corresponding connecting pipes (28).

8. The rapid dewatering device for deep foundation pits according to claim 1, characterized in that: The filtration mechanism (5) includes a fixed ring plate (501) connected to the water inlet end of the submersible pump (4). The middle part of the fixed ring plate (501) is connected to a filter tube (502) with a plurality of first isolation holes through a threaded connection. The outer side of the filter tube (502) is fitted with a filter cover (503) with a plurality of second isolation holes. The inner end of the filter cover (503) is provided with a plurality of corresponding positioning grooves (5031) distributed at equal angles. An L-shaped locking block (29) adapted to the positioning groove (5031) is detachably installed on the fixed ring plate (501). The positioning groove (5031) of the filter cover (503) is fixed by the L-shaped locking block (29).

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