Foundation pit underground water level intelligent control system and control method thereof

Abstract

The foundation pit underground water level intelligent control system and the control method thereof aim at solving the problem that foundation pit underground water is difficult to control. The system comprises a dewatering well, a water supplementing well, a dewatering device, a water supplementing device, an air pressure adjusting device and a water storage device, dewatering pipe branch pipes of the dewatering device are arranged in the dewatering well, a dewatering pipe main pipe is communicated with the water storage device, and a first electromagnetic control valve installed between the dewatering pipe main pipe and the water storage device is connected with a first water level sensor; a water supplementing pipe branch pipe of the water supplementing device is arranged in the water supplementing well, a water supplementing pipe main pipe is communicated with the water storage device, a second electromagnetic control valve installed between the water supplementing pipe main pipe and the water storage device is connected with a second water level sensor, and a fan of the air pressure adjusting device is communicated with the downcast pipe main pipe and the water supplementing pipe branch pipe. The method comprises the steps that when the water level of the dewatering well exceeds an early warning value, the draught fan pumps air in the branch pipe of the dewatering pipe, and underground water in the dewatering well is pumped to the water storage device; and when the water level in the water replenishing well is lower than an early warning value, the fan extracts air in the branch pipe of the water replenishing pipe, and water in the water storage device is replenished to the water replenishing well.

Description

Technical Field

[0001] The invention relates to the technical field of foundation pit groundwater level control, and in particular to a foundation pit groundwater level intelligent control system and a control method thereof. Background Art

[0002] During the foundation pit construction process, groundwater, especially groundwater in coastal areas, will have a huge impact on the safety of deep foundation pit construction. If precipitation measures are not in place, it may cause ground subsidence and bring safety hazards to the surrounding environment of the foundation pit. At present, the main measures used to control the balance and stability of the groundwater level are to set up precipitation wells and recharge water. However, since the above measures still rely on manual control, there is a lack of corresponding basis for precipitation and water replenishment, making it difficult to ensure the safety of foundation pit construction. Summary of the invention

[0003] With regard to the existing method of controlling the groundwater level balance of foundation pits, there is a lack of corresponding basis for precipitation and water replenishment, which leads to the problem that the groundwater control of foundation pits is difficult. The purpose of the present invention is to provide a foundation pit groundwater level intelligent control system and a control method thereof.

[0004] The technical solution adopted by the present invention to solve its technical problems is: an intelligent control system for underground water level in a foundation pit, which includes: a dewatering well, a water replenishing well, a dewatering device, a water replenishing device, an air pressure regulating device and a water storage device. The dewatering device includes a dewatering pipe main pipe, a dewatering pipe branch pipe, an electromagnetic control valve one arranged between the dewatering pipe main pipe and the dewatering pipe branch pipe and connected to the two, and a water level sensor one connected to the electromagnetic control valve one, and the dewatering pipe branch pipe and the water level sensor one are arranged in the dewatering well; the water replenishing device includes a water replenishing pipe main pipe, a water replenishing pipe branch pipe, and a water replenishing pipe main pipe and a water replenishing pipe branch pipe. An electromagnetic control valve 2 is provided between and connected to the water pipe branches, and a water level sensor 2 is connected to the electromagnetic control valve 2. The water supply pipe branch and the water level sensor 2 are arranged in the water supply well; the other ends of the downcomer pipe main pipe and the water supply pipe main pipe are respectively connected to the water storage device, and the water storage device is connected to the municipal pipe network; the air pressure regulating device includes a fan and two air ducts respectively connected to the fans, the other end of one air duct is connected to one end of the downcomer pipe main pipe close to the electromagnetic control valve 1, and the other end of the other air duct is connected to one end of the water supply pipe branch pipe close to the electromagnetic control valve 2.

[0005] The intelligent control system for underground water level in a foundation pit of the present invention comprises a precipitation well, a water replenishment well, a precipitation device, a water replenishment device, an air pressure regulating device and a water storage device. The precipitation pipe branch of the precipitation device is arranged in the precipitation well, the precipitation pipe main pipe is connected with the water storage device, and an electromagnetic control valve one installed between the precipitation pipe branch and the precipitation pipe main pipe is connected with a water level sensor one arranged in the precipitation well; the water replenishment pipe branch of the water replenishment device is arranged in the water replenishment well, the water replenishment pipe main pipe is connected with the water storage device, and an electromagnetic control valve two installed between the water replenishment pipe branch and the water replenishment pipe main pipe is connected with a water level sensor two arranged in the water replenishment well, and the fan of the air pressure regulating device is connected with the precipitation pipe main pipe and the water replenishment pipe branch through an air duct respectively; the water level sensor is used to monitor the water level in the precipitation well or the water replenishment well, and to issue an alarm when the water level exceeds or falls below the warning value, and to start the fan of the air pressure regulating device in conjunction with the electromagnetic control valve, and to control the flow direction and flow rate of water in the corresponding pipeline; when the precipitation well When the water level measured by the first water level sensor exceeds the warning value, the fan extracts the air in the branch pipe of the precipitation pipe, and uses the air pressure difference to pump the groundwater in the precipitation well to the main pipe of the precipitation pipe and flow to the water storage device until the water level drops below the warning value; when the water level measured by the second water level sensor in the water replenishment well is lower than the warning value, the fan extracts the air in the branch pipe of the water replenishment pipe, and the water in the water storage device flows to the main pipe of the water replenishment pipe under the action of the air pressure difference and is replenished to the water replenishment well until the water level rises above the warning value; the foundation pit groundwater level intelligent control system monitors the water level of the foundation pit groundwater in real time through water level sensors respectively arranged in the precipitation well and the water replenishment well, and automatically starts the fan of the air pressure regulating device when the water level exceeds or falls below the warning value, and uses the air pressure difference to realize automatic precipitation or replenishment, realizes the recycling of groundwater, and ensures that the foundation pit groundwater is in an overall balanced state. The system has high real-time response and high degree of automation, and reduces the energy consumption of the water pump, which is conducive to green construction.

[0006] Furthermore, the precipitation device also includes an electromagnetic flowmeter 1 arranged on the precipitation pipe branch, a precipitation water pump arranged at the bottom of the precipitation pipe branch and connected thereto, and the electromagnetic flowmeter 1 is signal-connected to the precipitation water pump; the water replenishment device also includes an electromagnetic flowmeter 2 arranged on the water replenishment pipe branch, a water replenishment water pump arranged at the bottom of the water replenishment pipe branch and connected thereto, and the electromagnetic flowmeter 2 is signal-connected to the water replenishment water pump.

[0007] Furthermore, the water storage device includes a water reservoir, a water pump, three electromagnetic control valves and three water level sensors. The water pump is arranged in the water reservoir and connected to the water pipe. The three electromagnetic control valves are arranged between the water pipe and the municipal pipeline network and are respectively connected to the two. The three water level sensors are arranged in the water reservoir and connected to the three electromagnetic control valves.

[0008] Furthermore, the downcomer branch pipe is composed of a horizontal branch pipe 1 and a vertical branch pipe 1 which are vertically arranged and connected. The horizontal branch pipe 1 forms an angle with the horizontal plane. The top of the vertical branch pipe 1 is connected to the horizontal branch pipe 1. The bottom of the vertical branch pipe 1 is located in the downcomer well. The electromagnetic control valve 1 is installed on the horizontal branch pipe 1. The end of the downcomer main pipe close to the electromagnetic control valve 1 is higher than the other end thereof connected to the water storage device.

[0009] Furthermore, the water supply pipe branch is composed of a horizontal branch pipe 2 and a vertical branch pipe 2 that are vertically arranged and connected. The horizontal branch pipe 2 forms an angle with the horizontal plane. The top of the vertical branch pipe 2 is connected to the horizontal branch pipe 2. The bottom of the vertical branch pipe 2 is located in the water supply well. The electromagnetic control valve 2 is installed on the horizontal branch pipe 2. The end of the water supply pipe main pipe close to the electromagnetic control valve 2 is lower than the other end of the water supply pipe main pipe connected to the water storage device.

[0010] In addition, the present invention also provides a control method for a foundation pit groundwater level intelligent control system, the steps are as follows:

[0011] When the water level measured by the water level sensor in the precipitation well exceeds the warning value, the electromagnetic control valve opens, the fan of the air pressure regulating device starts, and the air in the branch pipe of the precipitation pipe is extracted. Under the action of the air pressure difference, the groundwater in the precipitation well is pumped to the main pipe of the precipitation pipe and flows into the water storage device until the water level drops below the warning value;

[0012] When the water level measured by the second water level sensor in the water supply well is lower than the warning value, the second electromagnetic control valve opens, the fan of the air pressure regulating device starts, and the air in the water supply pipe branch is extracted. The water in the water storage device flows to the main water supply pipe under the action of the air pressure difference and flows into the water supply well until the water level rises above the warning value.

[0013] The control method of the foundation pit groundwater level intelligent control system of the present invention is as follows: when the water level measured by the first water level sensor in the precipitation well exceeds the warning value, the air in the precipitation pipe branch is extracted, and the groundwater in the precipitation well is pumped to the precipitation pipe main pipe and flows to the water storage device until the water level drops below the warning value; when the water level measured by the second water level sensor in the replenishment well is lower than the warning value, the air in the replenishment pipe branch is extracted, so that the water in the water storage device flows to the replenishment pipe main pipe and is replenished to the replenishment well until the water level rises above the warning value; the control method of the foundation pit groundwater level intelligent control system uses water level sensors respectively arranged in the precipitation well and the replenishment well to monitor the foundation pit groundwater level in real time, and automatically starts the fan of the air pressure regulating device when the water level exceeds or falls below the warning value, and uses the air pressure difference to realize automatic precipitation or replenishment, realizes the recycling of groundwater, and ensures that the foundation pit groundwater is in an overall balanced state. The system has high real-time response and high automation, and reduces the energy consumption of the water pump, which is conducive to realizing green construction.

[0014] Furthermore, the precipitation device also includes an electromagnetic flowmeter 1 arranged on the precipitation pipe branch, a precipitation pump arranged at the bottom of the precipitation pipe branch and connected to the precipitation pipe branch, and the electromagnetic flowmeter 1 is connected to the precipitation pump signal. When the electromagnetic flowmeter 1 on the precipitation pipe branch measures the groundwater flow rate, the precipitation pump is triggered to start and groundwater is pumped until the water level drops below the warning value; the water replenishment device also includes an electromagnetic flowmeter 2 arranged on the water replenishment pipe branch, a replenishment pump arranged at the bottom of the water replenishment pipe branch and connected to the replenishment pipe branch, and the electromagnetic flowmeter 2 is connected to the replenishment pump signal. When the electromagnetic flowmeter 2 on the water replenishment pipe branch measures the water flow rate, the replenishment pump is triggered to start and groundwater is replenished until the water level rises above the warning value. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of an embodiment of a foundation pit groundwater level intelligent control system of the present invention.

[0016] The numbers in the figure are as follows:

[0017] Dewatering well 1; water replenishment well 2; dewatering device 10; dewatering pipe branch 11; horizontal branch 11a; vertical branch 11b; dewatering pipe main pipe 12; electromagnetic control valve 14; electromagnetic flowmeter 15; water level sensor 16; dewatering water pump 17; water replenishment device 20; water replenishment pipe branch 21; horizontal branch 21a; vertical branch 21b; water replenishment pipe main pipe 22; electromagnetic control valve 24; electromagnetic flowmeter 25; water level sensor 26; fan 34; air duct 35; water storage device 40; water reservoir 41; electromagnetic control valve 342; water level sensor 343; water pump 45. DETAILED DESCRIPTION

[0018] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the drawings are all in very simplified form and use non-precise proportions, which are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the present invention. For the convenience of description, the "upper" and "lower" described below are consistent with the upper and lower directions of the drawings, but this cannot be a limitation of the technical solution of the present invention.

[0019] Combination Figure 1The invention discloses an intelligent control system for underground water level in a foundation pit, which comprises a precipitation well 1, a replenishment well 2, a precipitation device 10, a replenishment device 20, an air pressure regulating device and a water storage device 40. The precipitation device 10 comprises a precipitation pipe main pipe 12, a precipitation pipe branch pipe 11, an electromagnetic control valve 14 arranged between the precipitation pipe main pipe 12 and the precipitation pipe branch pipe 11 and connected to the two, and a water level sensor 16 connected to the electromagnetic control valve 14. The precipitation pipe branch pipe 11 and the water level sensor 16 are arranged in the precipitation well 1; the replenishment device 20 comprises a replenishment pipe main pipe 22, a replenishment pipe branch pipe 21, which are arranged between the replenishment pipe main pipe 22 and the replenishment pipe branch pipe 21 and connected to the two. An electromagnetic control valve 24 connected to the two, and a water level sensor 26 connected to the electromagnetic control valve 24, a water supply pipe branch 21 and a water level sensor 26 are arranged in the water supply well 2; the other ends of the downcomer main pipe 12 and the water supply pipe main pipe 22 are respectively connected to the water storage device 40, and the water storage device 40 is connected to the municipal pipe network; the air pressure regulating device includes a fan 34 and two air ducts 35 respectively connected to the fan 34, the other end of one air duct 35 is connected to one end of the downcomer main pipe 12 close to the electromagnetic control valve 14, and the other end of the other air duct 35 is connected to one end of the water supply pipe branch 21 close to the electromagnetic control valve 24.

[0020] The foundation pit groundwater level intelligent control system of the present invention comprises a precipitation well 1, a water replenishment well 2, a precipitation device 10, a water replenishment device 20, an air pressure regulating device and a water storage device 40. The precipitation pipe branch 11 of the precipitation device 10 is arranged in the precipitation well 1, the precipitation pipe main pipe 12 is connected with the water storage device 40, and the electromagnetic control valve 14 installed between the precipitation pipe branch 11 and the precipitation pipe main pipe 12 is connected with the water level sensor 16 arranged in the precipitation well 1; the water replenishment pipe branch 21 of the water replenishment device 20 is arranged in the water replenishment well 2, and the water replenishment pipe 12 is connected with the water storage device 40. The main pipe 22 is connected to the water storage device 40, the electromagnetic control valve 24 installed between the water supply pipe branch pipe 21 and the water supply pipe main pipe 22 is connected to the water level sensor 26 set in the water supply well 2, and the fan 34 of the air pressure regulating device is connected to the dewatering pipe main pipe 12 and the water supply pipe branch pipe 21 through the air duct 35 respectively; the water level sensor is used to monitor the water level in the dewatering well 1 or the water supply well 2, and when the water level exceeds or falls below the warning value, an alarm is issued, and the fan 34 of the air pressure regulating device is started, and the electromagnetic control valve is used to control the corresponding pipe The direction and flow rate of water in the channel; when the water level measured by the water level sensor 16 in the precipitation well 1 exceeds the warning value, the fan 34 extracts the air in the precipitation pipe branch 11, and uses the air pressure difference to pump the groundwater in the precipitation well 1 to the precipitation pipe main 12 and flow to the water storage device 40 until the water level drops below the warning value; when the water level measured by the water level sensor 26 in the replenishment well 2 is lower than the warning value, the fan 34 extracts the air in the replenishment pipe branch 21, and the water in the water storage device 40 flows to the replenishment pipe main 22 under the action of the air pressure difference and replenishes to the replenishment well 2. Well 2, until the water level rises above the warning value; the foundation pit groundwater level intelligent control system monitors the water level of the foundation pit groundwater in real time through water level sensors respectively arranged in the precipitation well 1 and the replenishment well 2, and automatically starts the fan 34 of the air pressure regulating device when the water level exceeds or falls below the warning value, and uses the air pressure difference to realize automatic precipitation or replenishment, thereby realizing the recycling of groundwater and ensuring that the foundation pit groundwater is in an overall balanced state. The system has high real-time response and high degree of automation, and also reduces the energy consumption of the water pump, which is conducive to realizing green construction.

[0021] like Figure 1As shown, the precipitation device 10 also includes an electromagnetic flowmeter 15 arranged on the precipitation pipe branch 11, a precipitation pump 17 arranged at the bottom of the precipitation pipe branch 11 and connected thereto, and the electromagnetic flowmeter 15 is connected to the precipitation pump 17 signal. When the electromagnetic flowmeter 15 on the precipitation pipe branch 11 measures the groundwater flow rate, the precipitation pump 17 is triggered to start, and groundwater is pumped until the water level drops below the warning value; the water replenishment device 20 also includes an electromagnetic flowmeter 25 arranged on the water replenishment pipe branch 21, a water replenishment pump arranged at the bottom of the water replenishment pipe branch 21 and connected thereto, and the electromagnetic flowmeter 25 is connected to the water replenishment pump signal. When the electromagnetic flowmeter 25 on the water replenishment pipe branch 21 measures the water flow rate, the water replenishment pump is triggered to start, and groundwater is replenished until the water level rises above the warning value. By utilizing the linkage between the electromagnetic flowmeter and the water pump to automatically control the start of the water pump, the water levels in the precipitation well 1 and the water replenishment well 2 can be adjusted quickly and timely.

[0022] like Figure 1 As shown, the water storage device 40 includes a water reservoir 41, a water pump 45, an electromagnetic control valve 3 42 and a water level sensor 3 43. The water pump 45 is arranged in the water reservoir 41 and communicated with the water delivery pipe. The electromagnetic control valve 3 42 is arranged between the water delivery pipe and the municipal pipe network and communicated with both of them respectively. The water level sensor 3 43 is arranged in the water reservoir 41 and connected with the electromagnetic control valve 3 42. When the water level in the water reservoir 41 is lower than a certain value, the water pump 45 is started to extract water from the municipal pipe network for replenishment. When the water level in the water reservoir 41 exceeds a certain value, the electromagnetic control valve 3 42 is opened to drain water through the municipal pipe network so that the water reservoir 41 maintains a certain amount of water.

[0023] like Figure 1 As shown, the downpipe branch 11 is composed of a horizontal branch 11a and a vertical branch 11b which are arranged and connected at the top and bottom. The horizontal branch 11a forms a certain angle with the horizontal plane, the top of the vertical branch 11b is connected to the horizontal branch 11a, and the bottom of the vertical branch 11b is located in the downpipe 1. The electromagnetic control valve 14 is installed on the horizontal branch 11a. The horizontal branch 11a is arranged to facilitate the water drawn from the water storage device 40 to flow into the downpipe 1 by gravity; the end of the downpipe main pipe 12 close to the electromagnetic control valve 14 is higher than the other end connected to the water storage device 40, and the slope of the downpipe main pipe 12 facilitates the water drawn from the downpipe 1 to flow into the water storage device 40 by gravity, thereby reducing the energy consumption of the downpipe pump 17.

[0024] Similarly, the water supply pipe branch 21 is composed of a horizontal branch pipe 21a and a vertical branch pipe 21b which are arranged and connected at the top and bottom. The horizontal branch pipe 21a forms a certain angle with the horizontal plane, the top of the vertical branch pipe 21b is connected to the horizontal branch pipe 21a, and the bottom of the vertical branch pipe 21b is located in the water supply well 2. The electromagnetic control valve 24 is installed on the horizontal branch pipe 21a to facilitate the water drawn from the water storage device 40 to flow into the water supply well 2 by gravity; the end of the water supply pipe main pipe 22 close to the electromagnetic control valve 24 is lower than the other end of the water supply pipe main pipe 22 connected to the water storage device 40, so that the water in the water storage device 40 can flow to the water supply well 2 by gravity for water replenishment.

[0025] This embodiment uses a PLC controller to achieve linkage control among the water level sensor, the electromagnetic control valve, the electromagnetic flow meter and the water pump. This is just an example and the controller is not limited to this.

[0026] Combination Figure 1 The control method of the foundation pit groundwater level intelligent control system of the present invention is described, and the specific steps are as follows:

[0027] When the water level measured by the water level sensor 16 in the precipitation well 1 exceeds the warning value, the electromagnetic control valve 14 is opened, and the fan 34 of the air pressure regulating device is started to extract the air in the precipitation pipe branch 11. Under the action of the air pressure difference, the groundwater in the precipitation well 1 is pumped to the precipitation pipe main 12 and flows into the water storage device 40 until the water level drops below the warning value;

[0028] When the water level measured by the water level sensor 26 in the water supply well 2 is lower than the warning value, the electromagnetic control valve 24 opens, the fan 34 of the air pressure regulating device starts, and the air in the water supply pipe branch 21 is extracted. The water in the water storage device 40 flows to the water supply pipe main 22 under the action of the air pressure difference and flows into the water supply well 2 until the water level rises above the warning value.

[0029] The control method of the foundation pit groundwater level intelligent control system of the present invention is as follows: when the water level measured by the water level sensor 16 in the precipitation well 1 exceeds the warning value, the air in the precipitation pipe branch 11 is extracted, and the groundwater in the precipitation well 1 is pumped to the precipitation pipe main 12 and flows to the water storage device 40 until the water level drops below the warning value; when the water level measured by the water level sensor 26 in the replenishment well 2 is lower than the warning value, the air in the replenishment pipe branch 21 is extracted, so that the water in the water storage device 40 flows to the replenishment pipe main 22 and replenishes the replenishment well 2 until the water level drops below the warning value. The water level rises above the warning value; the control method of the foundation pit groundwater level intelligent control system utilizes water level sensors respectively arranged in the precipitation well 1 and the water replenishment well 2 to monitor the foundation pit groundwater level in real time, and automatically starts the fan 34 of the air pressure regulating device when the water level exceeds or falls below the warning value, and utilizes the air pressure difference to realize automatic precipitation or water replenishment, thereby realizing the recycling of groundwater and ensuring that the foundation pit groundwater is in an overall balanced state. The system has high real-time response and high degree of automation, and also reduces the energy consumption of the water pump, which is conducive to realizing green construction.

[0030] The above steps also include: the precipitation device 10 also includes an electromagnetic flowmeter 15 arranged on the precipitation pipe branch 11, a precipitation pump 17 arranged at the bottom of the precipitation pipe branch 11 and connected thereto, and the electromagnetic flowmeter 15 is connected to the precipitation pump 17 signal. When the electromagnetic flowmeter 15 on the precipitation pipe branch 11 measures the groundwater flow rate, the precipitation pump 17 is triggered to start and pump groundwater until the water level drops below the warning value; the water replenishment device 20 also includes an electromagnetic flowmeter 25 arranged on the water replenishment pipe branch 21, a water replenishment pump arranged at the bottom of the water replenishment pipe branch 21 and connected thereto, and the electromagnetic flowmeter 25 is connected to the water replenishment pump signal. When the electromagnetic flowmeter 25 on the water replenishment pipe branch 21 measures the water flow rate, the water replenishment pump is triggered to start and replenish groundwater until the water level rises above the warning value. By utilizing the linkage between the electromagnetic flowmeter and the water pump to automatically control the start of the water pump, the water levels in the precipitation well 1 and the water replenishment well 2 can be adjusted quickly and timely.

[0031] The above description is only a description of the preferred embodiments of the present invention, and is not intended to limit the scope of the present invention. Any changes or modifications made by a person skilled in the art in the field of the present invention based on the above disclosure shall fall within the scope of the claims.

Claims

1. An intelligent control system for groundwater level in a foundation pit, characterized in that: It includes: A precipitation well, a water replenishment well, a precipitation device, a water replenishment device, an air pressure regulating device and a water storage device. The precipitation device comprises a precipitation pipe main pipe, a precipitation pipe branch pipe, an electromagnetic control valve one arranged between the precipitation pipe main pipe and the precipitation pipe branch pipe and connected to the two, and a water level sensor one connected to the electromagnetic control valve one, and the precipitation pipe branch pipe and the water level sensor one are arranged in the precipitation well; the water replenishment device comprises a water replenishment pipe main pipe, a water replenishment pipe branch pipe, an electromagnetic control valve two arranged between the water replenishment pipe main pipe and the water replenishment pipe branch pipe and connected to the two, and a water level sensor two connected to the electromagnetic control valve two, and the water replenishment pipe branch pipe and the water level sensor two are arranged in the water replenishment well; the other ends of the precipitation pipe main pipe and the water replenishment pipe main pipe are respectively connected to the water storage device, and the water storage device is connected to the municipal pipe network; the air pressure regulating device comprises a fan and two air ducts respectively connected to the fan, the other end of one air duct is connected to one end of the precipitation pipe main pipe close to the electromagnetic control valve one, and the other end of the other air duct is connected to one end of the water replenishment pipe branch pipe close to the electromagnetic control valve two.

2. The intelligent control system for groundwater level in foundation pit according to claim 1 is characterized in that: The precipitation device also includes an electromagnetic flowmeter 1 arranged on the precipitation pipe branch, a precipitation water pump arranged at the bottom of the precipitation pipe branch and connected to the precipitation pipe branch, and the electromagnetic flowmeter 1 is signal-connected to the precipitation water pump; the water replenishment device also includes an electromagnetic flowmeter 2 arranged on the water replenishment pipe branch, a water replenishment water pump arranged at the bottom of the water replenishment pipe branch and connected to the precipitation water pump branch, and the electromagnetic flowmeter 2 is signal-connected to the water replenishment water pump.

3. The intelligent control system for groundwater level in foundation pit according to claim 1 is characterized in that: The water storage device includes a water reservoir, a water pump, three electromagnetic control valves and three water level sensors. The water pump is arranged in the water reservoir and connected to the water pipe. The three electromagnetic control valves are arranged between the water pipe and the municipal pipeline network and are respectively connected to the two. The three water level sensors are arranged in the water reservoir and connected to the three electromagnetic control valves.

4. The intelligent control system for groundwater level in foundation pit according to claim 1 is characterized in that: The downcomer branch pipe is composed of a horizontal branch pipe 1 and a vertical branch pipe 1 which are vertically arranged and connected. The horizontal branch pipe 1 forms an angle with the horizontal plane. The top of the vertical branch pipe 1 is connected to the horizontal branch pipe 1. The bottom of the vertical branch pipe 1 is located in the downcomer well. The electromagnetic control valve 1 is installed on the horizontal branch pipe 1. The end of the downcomer main pipe close to the electromagnetic control valve 1 is higher than the other end connected to the water storage device.

5. The intelligent control system for groundwater level in foundation pit according to claim 1 is characterized in that: The water supply pipe branch consists of a horizontal branch pipe 2 and a vertical branch pipe 2 that are vertically arranged and connected. The horizontal branch pipe 2 forms an angle with the horizontal plane. The top of the vertical branch pipe 2 is connected to the horizontal branch pipe 2. The bottom of the vertical branch pipe 2 is located in the water supply well. The electromagnetic control valve 2 is installed on the horizontal branch pipe 2. The end of the water supply pipe main pipe close to the electromagnetic control valve 2 is lower than the other end of the water supply pipe main pipe connected to the water storage device.

6. The control method of the foundation pit groundwater level intelligent control system according to any one of claims 1 to 5, characterized in that: Here are the steps: When the water level measured by the water level sensor in the precipitation well exceeds the warning value, the electromagnetic control valve opens, the fan of the air pressure regulating device starts, and the air in the branch pipe of the precipitation pipe is extracted. Under the action of the air pressure difference, the groundwater in the precipitation well is pumped to the main pipe of the precipitation pipe and flows into the water storage device until the water level drops below the warning value; When the water level measured by the second water level sensor in the water supply well is lower than the warning value, the second electromagnetic control valve opens, the fan of the air pressure regulating device starts, and the air in the water supply pipe branch is extracted. The water in the water storage device flows to the main water supply pipe under the action of the air pressure difference and flows into the water supply well until the water level rises above the warning value.

7. The control method of the foundation pit groundwater level intelligent control system according to claim 6 is characterized by: The precipitation device also includes an electromagnetic flowmeter 1 arranged on the precipitation pipe branch, a precipitation pump arranged at the bottom of the precipitation pipe branch and connected to the precipitation pipe branch, and the electromagnetic flowmeter 1 is connected to the precipitation pump signal. When the electromagnetic flowmeter 1 on the precipitation pipe branch measures the groundwater flow rate, the precipitation pump is triggered to start and pump groundwater until the water level drops below the warning value; the water replenishment device also includes an electromagnetic flowmeter 2 arranged on the water replenishment pipe branch, a replenishment pump arranged at the bottom of the water replenishment pipe branch and connected to the replenishment pipe branch, and the electromagnetic flowmeter 2 is connected to the replenishment pump signal. When the electromagnetic flowmeter 2 on the water replenishment pipe branch measures the water flow rate, the replenishment pump is triggered to start and replenish groundwater until the water level rises above the warning value.

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