Automatic recharge system and method for foundation pit dewatering well

Abstract

The invention discloses an automatic recharge system for a foundation pit dewatering well, which comprises a dewatering well, a water pump, an automatic recharge device, a water pump, an automatic recharge device and an automatic recharge device, and is characterized in that the dewatering well is internally provided with a water pump; a low liquid level sensor, a high liquid level sensor, a pressure sensor, a flange sheet and a circular plate are arranged in the recharge well; the flange piece is welded to a wellhead of the recharge well, and the circular plate is connected with the flange piece through bolts and used for sealing the recharge well. The low-liquid-level sensor is arranged at the lower end of the inner side face of the recharge well, and the high-liquid-level sensor is arranged at the upper end of the inner side face of the recharge well and used for monitoring water level changes of the recharge well in real time. The pressure sensor is in threaded connection with the circular plate and is used for measuring in-well air pressure in real time; the dewatering well is connected with the recharge well and the outside of the well through the dewatering well pipeline system and used for recharge and water pumping and drainage; tap water is connected with the recharge well through the tap water pipeline system and used for supplementing foundation pit dewatering recharge. The invention further discloses an automatic recharge method for the foundation pit dewatering well. The construction efficiency is improved, and the construction period of foundation pit dewatering engineering is shortened.

Description

Technical Field

[0001] The invention relates to an automatic recharging system and method for a foundation pit dewatering well. Background Art

[0002] Foundation pit dewatering refers to the dewatering work done to ensure that the foundation pit can be constructed under dry conditions, to prevent slope instability, foundation sand flow, pit bottom uplift, pit bottom pipe burst and reduced foundation bearing capacity when the groundwater level is higher than the bottom of the excavation during foundation pit excavation. However, the use of drainage method to treat groundwater in the site in foundation pit engineering will cause uneven settlement of neighboring buildings. When the uneven settlement reaches a certain level, neighboring buildings will crack, tilt or even collapse. Therefore, in conjunction with the foundation pit slope support for dewatering design and construction, it is necessary to attach great importance to the impact of dewatering on neighboring buildings, limit the uneven settlement within the allowable range, and ensure the safety of the foundation pit and surrounding buildings. Therefore, a recharge well can be set between the dewatering well point and the important building, and groundwater can be recharged into it during dewatering, which greatly reduces the dewatering speed and thus controls the ground settlement. The current recharge process of precipitation wells at home and abroad is mainly: groundwater is directly extracted from the precipitation well by a water pump and recharged into the recharge well. Manual valves are used in the pipeline, and the precipitation process needs to be manually adjusted. The process is cumbersome and inefficient. It is impossible to automatically record the recharge data of the precipitation well, and there are construction safety hazards.

[0003] Therefore, an automatic recharging system and method for a foundation pit dewatering well are provided. Summary of the invention

[0004] The purpose of the present invention is to overcome the existing defects and provide an automatic recharging system and method for a foundation pit dewatering well, thereby improving the construction efficiency and reducing the construction period of the foundation pit dewatering project.

[0005] The technical solution to achieve the above purpose is:

[0006] One of the present invention is an automatic recharging system for a foundation pit dewatering well, comprising: a dewatering well, a recharging well, a dewatering well pipeline system and a tap water pipeline system;

[0007] The precipitation well is equipped with a water pump for extracting groundwater in the precipitation well;

[0008] The recharging well is built with a low liquid level sensor, a high liquid level sensor, a pressure sensor, a flange and a circular plate;

[0009] The flange is welded to the wellhead of the reinjection well, and the circular plate is connected to the flange by bolts, so as to be used for sealing the reinjection well;

[0010] The low liquid level sensor is arranged at the lower end of the inner side of the recharging well, and the high liquid level sensor is arranged at the upper end of the inner side of the recharging well, for real-time monitoring of the water level change of the recharging well;

[0011] The pressure sensor is threadedly connected to the circular plate and is used to measure the gas pressure in the well in real time;

[0012] The precipitation well is connected to the recharging well and the outside of the well through the precipitation well pipeline system for recharging and pumping out water;

[0013] The tap water is connected to the recharging well through the tap water pipeline system, and is used to supplement the foundation pit precipitation recharging.

[0014] Preferably, the precipitation well pipeline system includes a precipitation well pipeline, a first electric ball valve, a second electric ball valve, a first electromagnetic flowmeter, a second electromagnetic flowmeter and a plurality of first flanges;

[0015] The water pump is connected to the recharging well and outside the well through the precipitation well pipeline, and the precipitation well pipeline is provided with the first electric ball valve, the second electric ball valve, the first electromagnetic flowmeter, the second electromagnetic flowmeter and a plurality of first flanges.

[0016] Preferably, the first electromagnetic flowmeter, the second electric ball valve and the second electromagnetic flowmeter are sequentially arranged on the precipitation well pipeline connecting the water pump to the recharge well, and the first flange is arranged on both sides of the first electromagnetic flowmeter, the second electric ball valve and the second electromagnetic flowmeter, and the first electric ball valve is connected between the first electromagnetic flowmeter and the second electric ball valve.

[0017] Preferably, the first electric ball valve is provided on the drainage well pipeline outside the well connected to the water pump, and the first flange is provided on both sides of the first electric ball valve.

[0018] Preferably, the tap water pipeline system includes a tap water pipeline, a third electric ball valve, a third electromagnetic flowmeter and a plurality of second flanges;

[0019] The tap water is connected to the recharging well through the tap water pipeline, and the third electric ball valve, the third electromagnetic flowmeter and a plurality of second flanges are arranged on the tap water pipeline.

[0020] Preferably, the third electric ball valve and the third electromagnetic flowmeter are sequentially arranged on the tap water pipeline connecting the tap water to the recharging well, and the second flange is arranged on both sides of the third electric ball valve and the third electromagnetic flowmeter.

[0021] A second automatic recharging method for a foundation pit dewatering well of the present invention comprises:

[0022] Step S1, when the water level is lower than the lowest water level of the low liquid level sensor, the first electric ball valve and the third electric ball valve are closed, the second electric ball valve is opened, and the groundwater in the precipitation well is recharged into the recharge well through the water pump;

[0023] Step S2, when the water level is higher than the highest water level of the high liquid level sensor, the second electric ball valve and the third electric ball valve are closed, the first electric ball valve is opened, the recharging is completed, and the remaining water in the precipitation well is directly discharged out of the well;

[0024] Step S3, when the water level is between the low liquid level sensor and the high liquid level sensor, and there is no flow in the second electromagnetic flowmeter, the first electric ball valve and the second electric ball valve are closed, the third electric ball valve is opened, and the tap water pipe starts to be filled with water until the water level is higher than the highest water level of the high liquid level sensor, the third electric ball valve is closed, and the refilling is completed.

[0025] The beneficial effects of the present invention are as follows: the present invention uses a liquid level sensor to sense the water level of the recharging well in real time, automatically controls the switch of the electric ball valve, adjusts the recharging and drainage of the pipeline system, and greatly reduces the time for manual observation and valve switching, which can not only ensure the adequacy of the recharging system debugging work before recharging, but also can economically and efficiently carry out foundation pit dewatering and recharging, which not only greatly shortens the construction period of the foundation pit dewatering and recharging project, but also reduces the debugging work of the system during the foundation pit dewatering construction process, thereby achieving the purpose of automatically controlling the recharging process; realizing the automated control of the foundation pit dewatering and recharging project BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of an automatic recharging system for a foundation pit dewatering well of the present invention;

[0027] Figure 2 It is a partial assembly diagram of the reinjection well in the present invention;

[0028] Figure 3 It is a partial cross-sectional view of the reinjection well in the present invention;

[0029] Figure 4 It is a structural schematic diagram of the flange in the present invention;

[0030] Figure 5 It is a structural schematic diagram of the circular plate in the present invention;

[0031] Figure 6 The present invention discloses a flow chart of an automatic recharging method for a foundation pit dewatering well.

[0032] In the figure: 1. dewatering well; 2. recharging well; 3. water pump; 4. low liquid level sensor; 5. high liquid level sensor; 6. pressure sensor; 7. flange; 8. round plate; 9. dewatering well pipeline; 10. first electric ball valve; 11. second electric ball valve; 12. first electromagnetic flowmeter; 13. second electromagnetic flowmeter; 14. first flange; 15. tap water pipeline; 16. third electric ball valve; 17. third electromagnetic flowmeter; 18. second flange; 20. bolts. DETAILED DESCRIPTION

[0033] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0034] The present invention will be further described below in conjunction with the accompanying drawings.

[0035] like Figure 1-5 As shown, an automatic recharging system for a foundation pit dewatering well comprises: a dewatering well 1, a recharging well 2, a dewatering well pipeline system and a tap water pipeline system;

[0036] The precipitation well 1 is equipped with a water pump 3 for extracting groundwater in the precipitation well 1 .

[0037] The recharging well 2 is built with a low liquid level sensor 4 , a high liquid level sensor 5 , a pressure sensor 6 , a flange 7 and a circular plate 8 .

[0038] The flange 7 is welded to the wellhead of the reinjection well 2 , and the circular plate 8 is connected to the flange 7 by bolts 20 , so as to seal the reinjection well 2 .

[0039] The low liquid level sensor 4 is arranged at the lower end of the inner side surface of the recharging well 2, and the high liquid level sensor 5 is arranged at the upper end of the inner side surface of the recharging well 2, for real-time monitoring of the water level change of the recharging well 2.

[0040] The pressure sensor 6 is threadedly connected to the circular plate 8 and is used to measure the gas pressure in the well in real time.

[0041] The precipitation well 1 is connected to the recharge well 2 and the outside of the well through the precipitation well pipeline system for recharge and drainage.

[0042] The tap water is connected to the recharging well 2 through the tap water pipeline system, and is used to supplement the foundation pit precipitation recharging to ensure the integrity of the foundation pit precipitation recharging.

[0043] In the embodiment, the precipitation well pipeline system includes a precipitation well pipeline 9, a first electric ball valve 10, a second electric ball valve 11, a first electromagnetic flowmeter 12, a second electromagnetic flowmeter 13 and a plurality of first flanges 14;

[0044] The water pump 3 is connected to the recharging well 2 and the outside of the well through the precipitation well pipeline 9, and the precipitation well pipeline 9 is provided with a first electric ball valve 10, a second electric ball valve 11, a first electromagnetic flowmeter 12, a second electromagnetic flowmeter 13 and a plurality of first flanges 14;

[0045] Among them, the first electric ball valve 10 and the second electric ball valve 11 control the reinjection and discharge of groundwater, have good economy, and can meet the automatic regulation of the reinjection process.

[0046] In the embodiment, a first electromagnetic flowmeter 12, a second electric ball valve 11 and a second electromagnetic flowmeter 13 are sequentially arranged on the precipitation well pipeline 9 connecting the water pump 3 to the recharge well 2, and a first flange 14 is arranged on both sides of the first electromagnetic flowmeter 12, the second electric ball valve 11 and the second electromagnetic flowmeter 13.

[0047] In the embodiment, a first electric ball valve 10 is provided on the precipitation well pipeline 9 connecting the water pump 3 outside the well, a first flange 14 is provided on both sides of the first electric ball valve 10, and the first electric ball valve 10 is connected between the first electromagnetic flowmeter 12 and the second electric ball valve 11.

[0048] In the embodiment, the tap water pipeline system includes a tap water pipeline 15, a third electric ball valve 16, a third electromagnetic flowmeter 17 and a plurality of second flanges 18;

[0049] The tap water is connected to the recharging well 2 through the tap water pipeline 15, and the tap water pipeline 15 is provided with a third electric ball valve 16, a third electromagnetic flowmeter 17 and a plurality of second flanges 18;

[0050] Among them, the third electric ball valve 16 controls the reinjection of tap water, which can meet the automatic regulation of the reinjection process.

[0051] In the embodiment, a third electric ball valve 16 and a third electromagnetic flowmeter 17 are sequentially arranged on the tap water pipeline 15 connecting the tap water to the recharging well 2 , and a second flange 18 is arranged on both sides of the third electric ball valve 16 and the third electromagnetic flowmeter 17 .

[0052] In the embodiment, the first electromagnetic flowmeter 12, the second electromagnetic flowmeter 13 and the third electromagnetic flowmeter 17 can flexibly and accurately control the electric ball valve in the pipeline system, greatly reducing the time required for manual valve opening, which can not only ensure the adequacy of the commissioning work of the foundation pit dewatering and recharging system, but also greatly shorten the construction period of the foundation pit dewatering and recharging project, improve the safety of recharging, and leave sufficient preparation time for the later construction work.

[0053] like Figure 1-6 As shown, a method for automatically recharging a foundation pit dewatering well comprises:

[0054] Step S1, when the water level is lower than the lowest water level of the low liquid level sensor 4, the first electric ball valve 10 and the third electric ball valve 16 are closed, the second electric ball valve 11 is opened, and the groundwater in the precipitation well 1 is recharged into the recharge well 2 through the water pump 3.

[0055] Step S2, when the water level is higher than the highest water level of the high liquid level sensor 5, the second electric ball valve 11 and the third electric ball valve 16 are closed, the first electric ball valve 10 is opened, the recharging is completed, and the remaining water in the precipitation well 1 is directly discharged out of the well.

[0056] Step S3, when the water level is between the low liquid level sensor 4 and the high liquid level sensor 5, and there is no flow in the second electromagnetic flowmeter 13, the first electric ball valve 10 and the second electric ball valve 11 are closed, and the third electric ball valve 16 is opened, and the tap water pipe starts to be filled with water until the water level is higher than the highest water level of the high liquid level sensor 5, the third electric ball valve 16 is closed, and the refilling is completed.

[0057] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that the technical solutions described in the above embodiments may still be modified, or some or all of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An automatic recharging system for a foundation pit dewatering well, characterized in that: include: A precipitation well (1), a recharging well (2), a precipitation well pipeline system and a tap water pipeline system; The precipitation well (1) is equipped with a water pump (3) for extracting groundwater in the precipitation well (1); The reinjection well (2) is equipped with a low liquid level sensor (4), a high liquid level sensor (5), a pressure sensor (6), a flange (7) and a circular plate (8); The flange (7) is welded to the wellhead of the reinjection well (2), and the circular plate (8) is connected to the flange (7) via bolts (20) for sealing the reinjection well (2); The low liquid level sensor (4) is arranged at the lower end of the inner side surface of the reinjection well (2), and the high liquid level sensor (5) is arranged at the upper end of the inner side surface of the reinjection well (2), and is used to monitor the water level change of the reinjection well (2) in real time; The pressure sensor (6) is threadedly connected to the circular plate (8) and is used to measure the gas pressure in the well in real time; The dewatering well (1) is connected to the recharging well (2) and the outside of the well through the dewatering well pipeline system for recharging and pumping out water; The tap water is connected to the recharging well (2) through the tap water pipeline system, and is used to supplement the foundation pit dewatering and recharging.

2. The automatic recharging system for foundation pit dewatering wells according to claim 1 is characterized in that: The precipitation well pipeline system comprises a precipitation well pipeline (9), a first electric ball valve (10), a second electric ball valve (11), a first electromagnetic flowmeter (12), a second electromagnetic flowmeter (13) and a plurality of first flanges (14); The water pump (3) is connected to the recharging well (2) and the outside of the well via the precipitation well pipeline (9); the precipitation well pipeline (9) is provided with the first electric ball valve (10), the second electric ball valve (11), the first electromagnetic flowmeter (12), the second electromagnetic flowmeter (13) and a plurality of first flanges (14).

3. The automatic recharging system for foundation pit dewatering wells according to claim 2 is characterized in that: The first electromagnetic flowmeter (12), the second electric ball valve (11) and the second electromagnetic flowmeter (13) are sequentially arranged on the precipitation well pipeline (9) connecting the water pump (3) to the recharging well (2), and the first electromagnetic flowmeter (12), the second electric ball valve (11) and the second electromagnetic flowmeter (13) are each provided with a first flange (14) on both sides.

4. The automatic recharging system for foundation pit dewatering wells according to claim 2 is characterized in that: The first electric ball valve (10) is arranged on the drainage well pipeline (9) outside the well connected to the water pump (3), and a first flange (14) is arranged on both sides of the first electric ball valve (10). The first electric ball valve (10) is connected between the first electromagnetic flowmeter (12) and the second electric ball valve (11).

5. The automatic recharging system for foundation pit dewatering wells according to claim 1 is characterized in that: The tap water pipeline system comprises a tap water pipeline (15), a third electric ball valve (16), a third electromagnetic flowmeter (17) and a plurality of second flanges (18); The tap water is connected to the recharging well (2) through the tap water pipeline (15), and the tap water pipeline (15) is provided with the third electric ball valve (16), the third electromagnetic flowmeter (17) and a plurality of second flanges (18).

6. The automatic recharging system for foundation pit dewatering wells according to claim 5 is characterized in that: The third electric ball valve (16) and the third electromagnetic flow meter (17) are sequentially arranged on the tap water pipeline (15) for connecting tap water to the recharging well (2), and a second flange (18) is arranged on both sides of the third electric ball valve (16) and the third electromagnetic flow meter (17).

7. A method for automatic recharging of a foundation pit dewatering well, characterized in that: include: Step S1, when the water level is lower than the lowest water level of the low liquid level sensor (4), the first electric ball valve (10) and the third electric ball valve (16) are closed, the second electric ball valve (11) is opened, and the groundwater in the precipitation well (1) is recharged into the recharge well (2) through the water pump (3); Step S2, when the water level is higher than the highest water level of the high liquid level sensor (5), the second electric ball valve (11) and the third electric ball valve (16) are closed, the first electric ball valve (10) is opened, the recharging is completed, and the remaining water in the precipitation well (1) is directly discharged out of the well; Step S3, when the water level is between the low liquid level sensor (4) and the high liquid level sensor (5), and the second electromagnetic flowmeter (13) has no flow, the first electric ball valve (10) and the second electric ball valve (11) are closed, the third electric ball valve (16) is opened, and the tap water pipe starts to be filled with water until the water level is higher than the highest water level of the high liquid level sensor (5), the third electric ball valve (16) is closed, and the refilling is completed.

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