Deep foundation pit drainage structure

Abstract

The utility model discloses a deep foundation pit drainage structure, and belongs to the technical field of foundation pit construction. Comprising a foundation, and a deep foundation pit and a dewatering well are formed in the upper surface of the foundation; the number of the dewatering wells is four, and the four dewatering wells are arranged in the circumferential direction with the deep foundation pit as the center. The dewatering wells are arranged on the sides close to the corners of the deep foundation pit, and the four dewatering wells correspond to the corners of the deep foundation pit in a one-to-one mode. The dewatering well is arranged to be in an arc shape, and the depth of the dewatering well is larger than that of the deep foundation pit. According to the deep foundation pit drainage structure, the problem that the construction safety is affected due to the high water seepage probability of the foundation pit is solved.

Description

Technical Field

[0001] The present application relates to the technical field of foundation pit construction, and in particular to a deep foundation pit drainage structure. Background Art

[0002] During the early construction of the pump station, foundation pit drainage is an important technical problem. The pump station foundation pit is usually excavated in areas with high groundwater levels, and a large amount of groundwater seepage will be encountered during the construction process. In order to prevent soil flow, pipe bursts and sudden surges caused by deep confined water, the confined water head in the aquifer under the foundation pit should be reduced when necessary.

[0003] At present, common dewatering schemes in gravel layers with large permeability coefficients include: opening a dewatering well on both sides of the foundation pit, collecting groundwater in the dewatering well, and then pumping it out through the pump in the dewatering well, so that the groundwater level at the foundation pit drops; however, such a structure can only solve the seepage problem on both sides of the foundation pit, and there is still a certain amount of seepage on the other two sides, which reduces the safety of the later construction of the foundation pit.

[0004] Therefore, it is necessary to provide a deep foundation pit drainage structure to solve the above problems.

[0005] It should be noted that the above information disclosed in this background technology section is only for understanding the background technology of the present application concept, and therefore, it may contain information that does not constitute the prior art. Summary of the invention

[0006] Based on the above problems existing in the prior art, the problem to be solved by the present application is: to provide a deep foundation pit drainage structure to solve the problem of construction safety affected by the high probability of water seepage in the foundation pit.

[0007] The technical solution adopted by the present application to solve its technical problems is: a deep foundation pit drainage structure, comprising: a foundation, wherein a deep foundation pit and a drainage well are respectively opened on the upper surface of the foundation; four drainage wells are arranged, and the four drainage wells are circumferentially arranged with the deep foundation pit as the center; the drainage wells are arranged on a side close to the corner of the deep foundation pit, and the four drainage wells correspond to the corners of the deep foundation pit one by one; thus, the drainage wells arranged at the four corners of the deep foundation pit collect groundwater, which can make the highest point of the underground horizontal plane at the bottom of the deep foundation pit approach the horizontal plane of the drainage wells; by increasing the distance between the bottom of the deep foundation pit and the underground horizontal plane, the seepage degree of the deep foundation pit is indirectly delayed, and time can be reserved to cope with the sudden rise of the groundwater level.

[0008] Furthermore, the drainage well is arranged in an arc shape, and the depth of the drainage well is greater than the depth of the deep foundation pit; thus, the internal capacity is increased through the arc-shaped structure, and the range of controlling water seepage is widened.

[0009] Furthermore, each of the precipitation wells is provided with a pumping device for sucking water from the precipitation well, and the pumping device includes a crankshaft assembly, an extraction assembly, a pushing assembly, and a filtering assembly; support seats are installed at both ends of the crankshaft assembly through bearings, the bottom of the support seat is fixedly connected to the foundation, and the side of the crankshaft assembly is movably connected to the driving mechanism; one end of the extraction assembly and the pushing assembly are respectively connected to the crankshaft assembly through bearings, and a limit plate is fixedly installed on the outer side of the extraction assembly and the pushing assembly, and the limit plate is fixedly connected to the foundation; the filtering assembly is arranged at one end of the extraction assembly and the pushing assembly away from the crankshaft assembly, and one side is fixedly connected to the extraction assembly and the pushing assembly respectively; thereby, the filtering assembly is located below the horizontal plane of the precipitation well, and the extraction assembly and the pushing assembly are located at the wellhead of the precipitation well; the driving mechanism rotates the crankshaft assembly, so that the extraction assembly and the pushing assembly move up and down synchronously, the pushing assembly opens water inlet at the filtering assembly, and the extraction assembly discharges the groundwater filtered by the filtering assembly, thereby ensuring that the horizontal plane at the precipitation well is maintained below the rated horizontal plane.

[0010] Furthermore, the crankshaft assembly includes a gear main shaft and two crank shafts, the two crank shafts are respectively arranged at the end heads of the gear main shaft, and the two crank shafts are not at the same end of the gear main shaft; the ends of the two crank shafts away from the gear main shaft are connected to the support seat through bearings; the tooth surface of the gear main shaft is movably connected to the driving mechanism; thus, the driving mechanism controls the rotation of the gear main shaft, and the gear main shaft drives the crank shafts at both ends to rotate, thereby converting the rotational force transmitted by the driving mechanism into the torque of the crankshaft and outputting it to the extraction component and the pushing component.

[0011] Furthermore, the extraction assembly includes a connecting rod, a piston, and a cavity. The outer side of the cavity is fixedly connected to the limit plate, one side of the cavity is provided with an output pipe, and the bottom of the cavity is connected to the filter assembly through a pipeline; one end of the connecting rod is hinged to one of the crank shafts, and the end of the connecting rod away from the crank shaft extends into the cavity, and the side is slidably connected to the cavity; the piston is arranged in the cavity, and the side is connected to the cavity through a dynamic seal, and the top of the piston is provided with There is a triangular bracket, and one end of the triangular bracket away from the piston member is connected to the connecting rod through a rolling bearing; a through hole is opened in the center of the end face of the piston member, and a one-way valve is fixedly installed at the through hole; thus, the crank shaft rotates, so that the connecting rod pulls the piston member to move up and down in the cavity; when the piston member moves down, the groundwater filtered by the filter assembly enters the cavity and pushes the one-way valve to open and reach the top of the piston member; when the piston member moves up, the one-way valve is closed, and the piston member drives the water above to reach the output pipe for discharge.

[0012] Furthermore, the pushing assembly includes connecting rod 2, piston 2, and cavity 2; the outer side of cavity 2 is fixedly connected to the limit plate, and a one-way air intake pipe is provided on the side of cavity 2; one end of connecting rod 2 is hinged to another crank shaft, and the end of connecting rod 2 away from the crank shaft extends into cavity 2, and the side is slidingly connected to cavity 2; piston 2 is installed inside cavity 2 through a dynamic seal, and the top end is hinged to connecting rod 2, and piston 2 is located above the end of the air intake pipe close to cavity 2; thus, the rotation of the crank shaft drives connecting rod 2 to move, and connecting rod 2 controls piston 2 to move up and down inside cavity 2; piston 2 moves up, and air enters cavity 2 from the one-way air intake pipe, and then piston 2 moves down, pushing air into the filter assembly, so that the filter assembly works.

[0013] Further, the filter assembly includes a shell and a flow pipe; an air inlet pipe is arranged on one side of the shell, and one end of the air inlet pipe is connected to the second cavity through a pipeline; the flow pipe is located inside the shell, and a support seat 1 is sleeved on the outer side of the flow pipe close to the air inlet pipe, and the outer side of the support seat 1 is connected to the shell through a bearing; a plurality of turbine blades 1 are arranged at one end of the support seat 1, and the plurality of turbine blades 1 are arranged circumferentially with the flow pipe as the center, and the inner side of the turbine blade 1 is fixedly connected to the flow pipe;

[0014] A guide ring is provided at one end of the circulation pipe, and the guide ring is concave towards the circulation pipe; a bell tube is provided at one end of the outer shell close to the air inlet pipe, and part of the bell tube is located inside the guide ring, and a guide loop is formed between the guide ring and the bell tube; thereby, the pushing assembly allows air to enter between the outer shell and the circulation pipe through the air inlet pipe, and the airflow drives the circulation pipe to rotate through the turbine blades, and after passing through the turbine blades, it is discharged through the guide loop along the bell tube and the guide ring, so that the end of the circulation pipe close to the guide ring is in a low-pressure state, and then the water flow outside the bell tube enters the circulation pipe; thereby, the collection of groundwater in the precipitation well is realized.

[0015] Furthermore, filter holes are evenly opened on the side of the circulation pipe, and the filter holes are located at the end of the support seat away from the trumpet tube; thus, the groundwater entering the circulation pipe is separated by the filter holes after passing through the cross section of the support seat, so that the subsequent extraction component can take away the groundwater without sand and gravel.

[0016] Furthermore, a support seat 2 is fixedly connected to the outer side of an end of the circulation pipe away from the support seat 1, and the outer side of the support seat 2 is connected to the outer shell through a bearing. A liquid outlet pipe is provided on the side of the outer shell close to the support seat 2, and the liquid outlet pipe and the air inlet pipe are located on the same side; a plurality of turbine blades 2 are provided at the end of the support seat 2 close to the support seat 1, and the plurality of turbine blades 2 are circumferentially arranged with the circulation pipe as the center, and the inner side of the turbine blade 2 is fixedly connected to the circulation pipe; the turbine blade 2 is located at the end of the filter hole away from the support seat 1; thus, the rotating circulation pipe drives the turbine blade 2 to rotate, and the filtered groundwater flows to the turbine blade 2 and is then transported from the liquid outlet pipe to the cavity 1, thereby realizing the transportation of groundwater in the precipitation well.

[0017] Furthermore, both ends of the flow tube are connected to the outside of the shell; thus, the rotating flow tube cooperates with the hydraulic push to discharge the sand and gravel remaining in the filter hole from one end close to the support seat 2, thereby realizing self-cleaning of the flow tube.

[0018] The beneficial effects of the present application are as follows: a deep foundation pit drainage structure provided by the present application is provided with an arc-shaped precipitation well, and the arc-shaped structure makes the internal capacity larger and the range of controlling water seepage wider; four precipitation wells are arranged circumferentially with the deep foundation pit as the center, and the four precipitation wells correspond to the corners of the deep foundation pit one by one; thus, the precipitation wells arranged at the four corners of the deep foundation pit collect groundwater, which can make the highest point of the underground horizontal plane at the bottom of the deep foundation pit approach the horizontal plane of the precipitation wells; by increasing the distance between the bottom of the deep foundation pit and the underground horizontal plane, the degree of water seepage in the deep foundation pit is indirectly delayed, and time can be reserved to cope with the sudden rise of the groundwater level.

[0019] In addition to the above-described purposes, features and advantages, the present application also has other purposes, features and advantages. The present application will be further described in detail with reference to the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings in the specification, which constitute a part of the present application, are used to provide further understanding of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute improper limitations on the present application.

[0021] In the attached picture:

[0022] Figure 1 It is an overall schematic diagram of a deep foundation pit drainage structure in this application;

[0023] Figure 2 for Figure 1 A three-dimensional schematic diagram of the positional relationship between the medium-deep foundation pit and the dewatering well;

[0024] Figure 3 for Figure 1 The overall schematic diagram of the pumping device structure;

[0025] Figure 4 for Figure 3 A cross-sectional view of the assembly of the middle crankshaft assembly with the extraction assembly and the push assembly;

[0026] Figure 5 for Figure 3 A three-dimensional schematic diagram of the structure of the filter assembly (with the outer shell fully cut away);

[0027] Figure 6 for Figure 3 A cross-sectional view of the filter assembly structure;

[0028] Figure 7 for Figure 6 a schematic cross-sectional view of a filter assembly cross-sectional view;

[0029] Among them, the reference numerals in the figure are:

[0030] 1. Deep foundation pit; 2. Dewatering well; 3. Pumping device; 31. Crankshaft assembly; 311. Gear main shaft; 312. Crank shaft; 32. Extraction assembly; 321. Connecting rod one; 322. Piston one; 3221. Triangular bracket; 3222. Through hole; 323. Cavity one; 33. Push assembly; 331. Connecting rod two; 332. Piston two; 333. Cavity two; 34. Filter assembly; 341. Shell; 3411. Inlet pipe; 3412. Liquid outlet pipe; 3413. Trumpet pipe; 342. Circulation pipe; 3421. Filter hole; 3422. Support seat one; 3423. Support seat two; 3424. Guide ring; 3431. Turbine blade one; 3432. Turbine blade two; 344. Guide ring. DETAILED DESCRIPTION

[0031] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0032] In order to enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of this application.

[0033] like Figure 1-Figure 7 As shown, the present application provides a deep foundation pit drainage structure, including a foundation, referring to Figure 1 , Figure 2A deep foundation pit 1 and a drainage well 2 are respectively opened on the upper surface of the foundation; four drainage wells 2 are arranged, and the four drainage wells 2 are arranged circumferentially with the deep foundation pit 1 as the center; the drainage well 2 is arranged on the side close to the corner of the deep foundation pit 1, and the four drainage wells 2 correspond to the corners of the deep foundation pit 1 one by one; thus, the drainage wells 2 arranged at the four corners of the deep foundation pit 1 collect groundwater, which can make the highest point of the underground horizontal plane at the bottom of the deep foundation pit 1 approach the horizontal plane of the drainage well 2; by increasing the distance between the bottom of the deep foundation pit 1 and the underground horizontal plane, the seepage degree of the deep foundation pit 1 is indirectly delayed, and time can be reserved to cope with the sudden rise of the groundwater level.

[0034] Among them: the precipitation well 2 is set in an arc shape, and the depth of the precipitation well 2 is greater than the depth of the deep foundation pit 1; thus, the internal capacity is increased through the arc-shaped structure, and the range of controlling water seepage is widened.

[0035] Reference Figure 1 , Figure 3 , each precipitation well 2 is provided with a pumping device 3 for sucking water from the precipitation well 2, and the pumping device 3 includes a crankshaft assembly 31, an extraction assembly 32, a push assembly 33, and a filter assembly 34; both ends of the crankshaft assembly 31 are equipped with support seats through bearings, the bottom of the support seat is fixedly connected to the foundation, and the side of the crankshaft assembly 31 is movably connected to the driving mechanism; one end of the extraction assembly 32 and the push assembly 33 are respectively connected to the crankshaft assembly 31 through bearings, and a limit plate is fixedly installed on the outer side of the extraction assembly 32 and the push assembly 33, and the limit plate is fixedly connected to the foundation; the filter assembly 34 is arranged at the extraction assembly 31, and the filter assembly 34 is provided at the extraction assembly 31. The component 32 and the pushing component 33 are away from one end of the crankshaft component 31, and one side is fixedly connected to the extraction component 32 and the pushing component 33 respectively; thereby, the filtering component 34 is located below the horizontal plane of the precipitation well 2, and the extraction component 32 and the pushing component 33 are located at the wellhead of the precipitation well 2; the driving mechanism rotates the crankshaft component 31, so that the extraction component 32 and the pushing component 33 move up and down synchronously, the pushing component 33 opens water inlet at the filtering component 34, and the extraction component 32 discharges the groundwater filtered by the filtering component 34, thereby ensuring that the horizontal plane at the precipitation well 2 is maintained below the rated horizontal plane.

[0036] in:

[0037] Reference Figure 3 , Figure 4The crankshaft assembly 31 includes a gear main shaft 311 and two crank shafts 312. The two crank shafts 312 are respectively arranged at the ends of the gear main shaft 311, and the two crank shafts 312 are not at the same end of the gear main shaft 311; the ends of the two crank shafts 312 away from the gear main shaft 311 are connected to the support seat through bearings; the tooth surface of the gear main shaft 311 is movably connected to the driving mechanism; thus, the driving mechanism controls the rotation of the gear main shaft 311, and the gear main shaft 311 drives the crank shafts 312 at both ends to rotate, thereby converting the rotational force transmitted by the driving mechanism into the torque of the crankshaft and outputting it to the extraction component 32 and the pushing component 33.

[0038] Reference Figure 4 The extraction assembly 32 includes a connecting rod 321, a piston 322, and a cavity 323. The outer side of the cavity 323 is fixedly connected to the limit plate, an output pipe is provided on one side of the cavity 323, and the bottom of the cavity 323 is connected to the filter assembly 34 through a pipeline; one end of the connecting rod 321 is hinged to one of the crank shafts 312, and the end of the connecting rod 321 away from the crank shaft 312 extends into the cavity 323, and the side is slidably connected to the cavity 323; the piston 322 is arranged in the cavity 323, and the side is connected to the cavity 323 through a dynamic seal, and the top of the piston 322 is provided with a triangular bracket 322 1. One end of the triangular bracket 3211 away from the piston member 322 is connected to the connecting rod 321 through a rolling bearing; a through hole 3222 is provided in the center of the end surface of the piston member 322, and a one-way valve is fixedly installed at the through hole 3222; thus, the crank shaft 312 rotates, so that the connecting rod 321 pulls the piston member 322 to move up and down in the cavity 323; when the piston member 322 moves downward, the groundwater filtered by the filter assembly 34 enters the cavity 323 and pushes the one-way valve to open and reach the top of the piston member 322. When the piston member 322 moves upward, the one-way valve is closed, and the piston member 322 drives the water above to reach the output pipe for discharge.

[0039] Reference Figure 4The push assembly 33 includes a second connecting rod 331, a second piston 332, and a second cavity 333; the outer side of the second cavity 333 is fixedly connected to the limit plate, and a one-way air intake pipe is arranged on the side of the second cavity 333; one end of the second connecting rod 331 is hinged to another crank shaft 312, and the end of the second connecting rod 331 away from the crank shaft 312 extends into the second cavity 333, and the side is slidably connected to the second cavity 333; the second piston 332 is installed in the second cavity 333 through a dynamic seal The top end of the piston 332 is hinged with the connecting rod 331, and the piston 332 is located above the end of the intake pipe close to the cavity 333; thus, the crank shaft 312 rotates to drive the connecting rod 331 to move, and the connecting rod 331 controls the piston 332 to move up and down inside the cavity 333; the piston 333 moves up, and the air enters the cavity 333 from the one-way intake pipe, and then the piston 333 moves down, pushing the air into the filter assembly 34, so that the filter assembly 34 works.

[0040] Reference Figure 5 , Figure 6 , Figure 7 The filter assembly 34 includes a shell 341 and a flow pipe 342; an air inlet pipe 3411 is provided on one side of the shell 341, and one end of the air inlet pipe 3411 is connected to the cavity 2 333 through a pipeline; the flow pipe 342 is located inside the shell 341, and a support seat 1 3422 is sleeved on the outer side of the flow pipe 342 close to the air inlet pipe 3411, and the outer side of the support seat 1 3422 is connected to the shell 341 through a bearing; a plurality of turbine blades 1 3431 are provided at one end of the support seat 1 3422, and the plurality of turbine blades 1 3431 are arranged circumferentially with the flow pipe 342 as the center, and the inner side of the turbine blade 1 3431 is fixedly connected to the flow pipe 342;

[0041] A guide ring 3424 is provided at one end of the circulation pipe 342, and the guide ring 3424 is concave toward the circulation pipe 342; a bell tube 3413 is provided at one end of the outer shell 341 close to the air inlet pipe 3411, and a portion of the bell tube 3413 is located inside the guide ring 3424, and a guide loop 344 is formed between the guide ring 3424 and the bell tube 3413; thus, the pushing assembly 33 allows air to enter between the outer shell 341 and the circulation pipe 342 through the air inlet pipe 3411, and the airflow drives the circulation pipe 342 to rotate through the turbine blade 3431, and after passing through the turbine blade 3431, the airflow is discharged through the guide loop 344 along the bell tube 3413 and the guide ring 3424, so that the end of the circulation pipe 342 close to the guide ring 3424 is in a low-pressure state, and then the water flow outside the bell tube 3413 enters the circulation pipe 342; thereby, the collection of groundwater in the precipitation well 2 is realized.

[0042] Reference Figure 5 , Figure 6 , Figure 7, filter holes 3421 are evenly opened on the side of the circulation pipe 342, and the filter holes 3421 are located at the end of the support seat 3422 away from the trumpet tube 3413; therefore, the groundwater entering the circulation pipe 342 passes through the cross section where the support seat 3422 is located and is filtered and separated by the filter holes 3421, so that the later extraction component 32 can take away the groundwater without sand and gravel.

[0043] Reference Figure 5 , Figure 6 , Figure 7 The outer side of the circulation pipe 342 away from the support seat 1 3422 is fixedly connected with the support seat 2 3423, the outer side of the support seat 2 3423 is connected to the shell 341 through a bearing, and the shell 341 is provided with a liquid outlet pipe 3412 on the side close to the support seat 2 3423, and the liquid outlet pipe 3412 and the air inlet pipe 3411 are located on the same side; the end of the support seat 2 3423 close to the support seat 1 3422 is provided with a plurality of turbine blades 2 3432, and the plurality of turbine blades 2 3432 are arranged to flow The through pipe 342 is arranged in a central circumferential direction, and the inner side of the turbine blade 2 3432 is fixedly connected to the circulation pipe 342; the turbine blade 2 3432 is located at the end of the filter hole 3421 away from the support seat 1 3422; thus, the rotating circulation pipe 342 drives the turbine blade 2 3432 to rotate, thereby causing the filtered groundwater to flow to the turbine blade 2 3432 and then be transported from the liquid outlet pipe 3412 to the cavity 1 323, thereby realizing the transportation of groundwater in the precipitation well 2.

[0044] Reference Figure 6 , Figure 7 Both ends of the circulation tube 342 are connected to the outside of the shell 341; thus, the rotating circulation tube 342 cooperates with the hydraulic push to discharge the sand and gravel remaining in the filter hole 3421 from one end close to the support seat 3423, thereby realizing the self-cleaning of the circulation tube 342.

[0045] In summary, the driving mechanism drives the crankshaft 312 to rotate through the gear main shaft 312, and the two crankshafts 312 respectively drive the corresponding connecting rod 1 321 and connecting rod 2 331 to move, so that the piston 1 322 and the piston 2 332 move synchronously;

[0046] When the piston member 1 322 and the piston member 2 332 move upward, the air at the cavity 2 333 enters the cavity 2 333 from the one-way air inlet pipe; the cavity 1 323 performs a suction action on the filter assembly 34;

[0047] When the piston member 1 322 and the piston member 332 move downward, the piston 2 333 pushes the air through the air inlet pipe 3411 into between the housing 341 and the circulation pipe 342. Then, the airflow drives the circulation pipe 342 to rotate through the turbine blade 1 3431, and then passes through the turbine blade 1 3431 and is discharged along the bell pipe 3413 and the guide ring 3424 through the guide ring channel 344, so that the end of the circulation pipe 342 close to the guide ring 3424 is in a low pressure state.

[0048] Then, the water outside the bell tube 3413 enters the flow tube 342. When passing through the filter hole 3421, part of the groundwater enters between the housing 341 and the flow tube 342, leaving sand and gravel. The remaining water flows out from the other end of the flow tube 342 with the sand and gravel. The rotating flow tube 342 can prevent the sand and gravel from accumulating inside.

[0049] The rotating circulation pipe 342 drives the turbine blade 2 3432 to rotate, thereby causing the filtered groundwater to flow to the turbine blade 2 3432, and then, due to the centrifugal force, it is transported from the liquid outlet pipe 3412 to the cavity 1 323;

[0050] At this time, after the groundwater filtered by the filter assembly 34 enters the cavity 323, it moves in the opposite direction of the downwardly moving piston member 322, pushing the one-way valve to open and reaching the top of the piston member 322; when the piston member 322 moves up for the next time, the one-way valve closes, and the piston member 322 drives the water above to reach the output pipe for discharge.

[0051] By replacing the existing water pumping method with the water extraction device 3, the self-cleaning of the filter is achieved, and the number of times the filter assembly needs to be replaced and cleaned is reduced; at the same time, the combination of a turbo booster and a piston extraction method can save energy and labor.

[0052] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A deep foundation pit drainage structure, comprising a foundation, characterized in that: A deep foundation pit (1) and a drainage well (2) are respectively provided on the upper surface of the foundation; four drainage wells (2) are provided, and the four drainage wells (2) are arranged circumferentially with the deep foundation pit (1) as the center; the drainage wells (2) are provided on a side close to the corners of the deep foundation pit (1), and the four drainage wells (2) correspond one to one with the corners of the deep foundation pit (1).

2. A deep foundation pit drainage structure according to claim 1, characterized in that: The dewatering well (2) is arranged in an arc shape, and the depth of the dewatering well (2) is greater than the depth of the deep foundation pit (1).

3. A deep foundation pit drainage structure according to claim 2, characterized in that: Each of the precipitation wells (2) is provided with a pumping device (3) for pumping water from the precipitation well (2), wherein the pumping device (3) comprises a crankshaft assembly (31), an extraction assembly (32), a pushing assembly (33), and a filtering assembly (34); Support seats are installed at both ends of the crankshaft assembly (31) through bearings, the bottom of the support seat is fixedly connected to the foundation, and the side of the crankshaft assembly (31) is movably connected to the driving mechanism; one end of the extraction assembly (32) and the pushing assembly (33) are respectively connected to the crankshaft assembly (31) through bearings, and a limit plate is fixedly installed on the outer side of the extraction assembly (32) and the pushing assembly (33), and the limit plate is fixedly connected to the foundation; the filter assembly (34) is arranged at one end of the extraction assembly (32) and the pushing assembly (33) away from the crankshaft assembly (31), and one side is respectively fixedly connected to the extraction assembly (32) and the pushing assembly (33).

4. A deep foundation pit drainage structure according to claim 3, characterized in that: The crankshaft assembly (31) comprises a gear main shaft (311) and two crank shafts (312); the two crank shafts (312) are respectively arranged at the ends of the gear main shaft (311), and the two crank shafts (312) are not at the same end of the gear main shaft (311); one end of the two crank shafts (312) away from the gear main shaft (311) is connected to a support seat through a bearing; and the tooth surface of the gear main shaft (311) is movably connected to a driving mechanism.

5. A deep foundation pit drainage structure according to claim 4, characterized in that: The extraction assembly (32) comprises a connecting rod (321), a piston (322), and a cavity (323); the outer side of the cavity (323) is fixedly connected to a limit plate; an output pipe is provided on one side of the cavity (323); and the bottom of the cavity (323) is connected to a filter assembly (34) via a pipeline; One end of the connecting rod (321) is hinged to one of the crank shafts (312); the end of the connecting rod (321) away from the crank shaft (312) extends into the cavity (323), and the side surface is slidably connected to the cavity (323); the piston (322) is arranged in the cavity (323), and the side surface is connected to the cavity (323) through a dynamic seal; a triangular bracket (3221) is arranged at the top of the piston (322); the end of the triangular bracket (3221) away from the piston (322) is connected to the connecting rod (321) through a rolling bearing; a through hole (3222) is opened in the center of the end surface of the piston (322), and a one-way valve is fixedly installed at the through hole (3222).

6. A deep foundation pit drainage structure according to claim 5, characterized in that: The pushing assembly (33) comprises a second connecting rod (331), a second piston (332), and a second cavity (333); the outer side of the second cavity (333) is fixedly connected to a limit plate, and a one-way air intake pipe (3411) is arranged on the side of the second cavity (333); one end of the second connecting rod (331) is hinged to another crankshaft (312), and the end of the second connecting rod (331) away from the crankshaft (312) extends into the second cavity (333), and the side is slidably connected to the second cavity (333); the second piston (332) is installed inside the second cavity (333) through a dynamic seal, and the top end is hinged to the second connecting rod (331), and the second piston (332) is located above the end of the air intake pipe (3411) close to the second cavity (333).

7. A deep foundation pit drainage structure according to claim 6, characterized in that: The filter assembly (34) comprises an outer shell (341) and a circulation pipe (342); an air intake pipe (3411) is arranged on one side of the outer shell (341), and one end of the air intake pipe (3411) is connected to the second cavity (333) through a pipeline; the circulation pipe (342) is located inside the outer shell (341), and a support seat (3422) is sleeved on the outer side of the circulation pipe (342) close to the air intake pipe (3411), and the outer side of the support seat (3422) is connected to the outer shell (341) through a bearing; a plurality of turbine blades (3431) are arranged on one end of the support seat (3422), and the plurality of turbine blades (3431) are arranged circumferentially with the circulation pipe (342) as the center, and the inner side of the turbine blade (3431) is fixedly connected to the circulation pipe (342); A guide ring (3424) is provided at one end of the circulation pipe (342), and the guide ring (3424) is concave toward the circulation pipe (342); a bell tube (3413) is provided at one end of the housing (341) close to the air inlet pipe (3411), and a portion of the bell tube (3413) is located inside the guide ring (3424), and a guide ring (3424) channel (344) is formed between the guide ring (3424) and the bell tube (3413).

8. A deep foundation pit drainage structure according to claim 7, characterized in that: The side surface of the circulation tube (342) is evenly provided with filter holes (3421), and the filter holes (3421) are located at an end of the support seat (3422) away from the bell tube (3413).

9. A deep foundation pit drainage structure according to claim 8, characterized in that: The outer side of the end of the circulation pipe (342) away from the support seat one (3422) is fixedly connected to the support seat two (3423), the outer side of the support seat two (3423) is connected to the outer shell (341) through a bearing, and the side of the outer shell (341) close to the support seat two (3423) is provided with a liquid outlet pipe (3412), and the liquid outlet pipe (3412) and the air inlet pipe (3411) are located on the same side; the end of the support seat two (3423) close to the support seat one (3422) is provided with a plurality of turbine blades two (3432), the plurality of turbine blades two (3432) are circumferentially arranged with the circulation pipe (342) as the center, and the inner side of the turbine blade two (3432) is fixedly connected to the circulation pipe (342); the turbine blade two (3432) is located at the end of the filter hole (3421) away from the support seat one (3422).

10. A deep foundation pit drainage structure according to claim 9, characterized in that: Both ends of the circulation tube (342) are connected to the outside of the shell (341).

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