CN115110557B - Pneumatic negative pressure pumping method - Google Patents
Pneumatic negative pressure pumping method Download PDFInfo
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- CN115110557B CN115110557B CN202210632334.5A CN202210632334A CN115110557B CN 115110557 B CN115110557 B CN 115110557B CN 202210632334 A CN202210632334 A CN 202210632334A CN 115110557 B CN115110557 B CN 115110557B
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- 238000005086 pumping Methods 0.000 title claims abstract description 54
- 238000000034 method Methods 0.000 title claims abstract description 28
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 171
- 239000000203 mixture Substances 0.000 claims description 10
- 238000010276 construction Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D19/00—Keeping dry foundation sites or other areas in the ground
- E02D19/06—Restraining of underground water
- E02D19/10—Restraining of underground water by lowering level of ground water
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Jet Pumps And Other Pumps (AREA)
Abstract
The invention discloses a pneumatic negative pressure water pumping method, in particular to the technical field related to negative pressure water pumping, and the adopted equipment mainly comprises an air compressor, a large-sized air storage tank, a small-sized air storage tank, a pressure water storage tank and an air pressure vacuum generator. The pneumatic negative pressure pumping method provided by the invention only uses a single power source of the air compressor to generate positive pressure power and negative pressure power, and adopts high-pressure gas to generate negative pressure through the vacuum generator, so that the water tank can normally work without water, a plurality of devices are not needed to participate in the water pumping, noise pollution can be greatly reduced, the water draining speed is high, the pneumatic negative pressure pumping method is suitable for pumping and draining work of dewatering wells with different depths, and the application range is greatly improved.
Description
Technical Field
The invention relates to the technical field of negative pressure pumping, in particular to a pneumatic negative pressure pumping method.
Background
Conventional foundation pit drainage dewatering adopts the immersible pump to draw water, and the vacuum pump is taken out, carries out the water inflow in the well of applying negative pressure acceleration stratum in the well, perhaps adopts the air compressor machine to form the joint pumping system that water vapor mixture was followed by the vacuum pump and is taken out in the well. Both require a separate vacuum pump to provide a negative pressure source for extracting the mixture of gas and water vapor in the dewatering well. The vacuum pump generally adopts an injection type vacuum pump, water in the circulating water tank generates certain pressure and flow rate after acting through the circulating water pump, the water with certain pressure and flow rate enters a water collecting chamber of the water injector, the water is injected through a plurality of Laval nozzles on the orifice plate, the formed high-speed jet flow enables a mixing chamber of the injector to generate vacuum, a pumped medium enters the mixing chamber of the injector under the action of the vacuum, the pumped medium is fully mixed with the high-speed water flow in the mixing chamber, the pumped medium is discharged into the circulating water tank after being reduced in speed and pressurized through the venturi tube, non-condensable gas is separated out, the condensable gas overflows from an overflow port of the water tank, and the operation is repeatedly performed.
Because the jet vacuum pump needs to independently pump gas or water vapor mixture in the well, the jet vacuum pump has obvious defects in practical construction: 1. the jet vacuum pump needs to be connected with a circulating water tank with larger capacity, water adding operation is needed in the construction process, and the jet vacuum pump cannot run after water shortage; 2. after the jet vacuum pump is started for a long time, circulating water heats after circulating for a plurality of times, so that the stability of the whole equipment is influenced after the temperature of the whole equipment rises; 3. the jet vacuum pump has limited effective depth, and efficiency is realized in pumping water of a deep dewatering well; 4. the pumping dewatering well needs a plurality of equipment to participate, such as a submersible pump and an air compressor to participate together, a single equipment cannot work, the equipment cannot be integrated and installed in a centralized mode, and a plurality of small air compressors generate environmental noise.
In view of the above, the present inventors have proposed a pneumatic negative pressure pumping method.
Disclosure of Invention
The invention mainly aims to provide a pneumatic negative pressure pumping method which can effectively solve the problems in the background technology.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
the pneumatic negative pressure pumping method is characterized by comprising two working states of a negative pressure pumping operation working condition and a positive pressure drainage operation working condition, wherein the negative pressure pumping operation working condition and the positive pressure drainage operation working condition are repeatedly and circularly operated to realize continuous pumping;
the negative pressure pumping operation working condition comprises the following specific steps:
s11, switching on a power supply of the air compressor, inputting the pressurized air into a large-sized air storage tank for storage, and enabling high-pressure air to enter a small-sized air storage tank and an air pressure vacuum generator through pipelines respectively;
s12, the small air storage tank sends high-pressure air into a water-gas mixer in the dewatering well through a positive pressure connecting pipeline in a multi-way manner, so that water and gas are mixed to form a water-gas mixture;
s13, sucking air in the pressure water storage tank by the pneumatic vacuum generator by utilizing high-pressure gas conveyed by the small-sized gas storage tank, and forming negative pressure in the pressure water storage tank;
s14, the water outlet end of the water-gas mixer is connected with the pressure water storage tank through a negative pressure connecting pipeline, and the water-gas mixture in the water-gas mixer is sucked into the pressure water storage tank under the condition that negative pressure is generated in the pressure water storage tank;
s15, the water in the dewatering well is pumped out, the water level is lowered, and the purpose of pumping water is achieved;
the specific steps of the positive pressure drainage operation condition are as follows:
s21, when the water level in the pressure water storage tank exceeds a limit height, closing the air pressure vacuum generator;
s22, high-pressure gas in the small-sized gas storage tank is sent into the pressure water storage tank, so that the pressure in the pressure water storage tank is increased, water in the pressure water storage tank is discharged from a drainage pipeline under the high-pressure condition, and the drainage work is completed;
s23, when the water level in the pressure water storage tank is reduced to the height or is completely discharged, the high-pressure gas is stopped from being conveyed into the pressure water storage tank, the pneumatic vacuum generator is started, the pneumatic vacuum generator pumps the gas in the pressure water storage tank to form negative pressure, and the negative pressure water pumping operation working condition is returned.
Preferably, the positive pressure connecting pipelines are provided with a plurality of groups and are communicated with the air inlet end of the water-air mixer and the air outlet end of the message air storage tank, and each group of positive pressure connecting pipelines is provided with a first electromagnetic valve in a matched mode.
Preferably, the negative pressure connecting pipelines are provided with a plurality of groups and are communicated with the water-air mixer and the pressure water storage tank, and each group of negative pressure connecting pipelines is provided with a one-way electromagnetic valve in a matched mode.
Preferably, a drainage pipeline for draining water is further arranged outside the pressure water storage tank, and the drainage pipeline is provided with a second electromagnetic valve in a matching way for controlling on-off of drainage.
Preferably, a pressure detector for detecting the pressure in the pressure water storage tank in real time is arranged at the top of the pressure water storage tank.
Preferably, the output end of the air compressor is connected with the air inlet end of the large air storage tank through a pipeline, the air outlet end of the large air storage tank is connected with the air inlet end of the pneumatic vacuum generator and the air inlet end of the small air storage tank through pipelines respectively, and the small air storage tank is connected with the pressure water storage tank through a connecting pipeline.
Preferably, a third electromagnetic valve is arranged in a pipeline between the small air storage tank and the pressure water storage tank in a matching way.
Preferably, a high-level water level sensor and a low-level water level sensor are arranged in the pressure water storage tank.
Compared with the prior art, the invention has the following beneficial effects:
1. the pneumatic negative pressure pumping method adopts high-pressure gas to generate negative pressure through the vacuum generator, so that the water tank can work normally even if no water exists.
2. The pneumatic negative pressure pumping method only uses a single power source of the air compressor to generate positive pressure power and negative pressure power, and compressed air provides power to overcome energy loss caused by height difference, so that the whole equipment has high stability.
3. The pneumatic negative pressure pumping method adopts active drainage, has high drainage speed, can be suitable for pumping and draining work of dewatering wells with different depths, and has larger application range.
4. The pneumatic negative pressure pumping method has the advantages of single power unit, no participation of a plurality of devices, capability of greatly reducing noise pollution and simple and quick device installation.
Drawings
FIG. 1 is a schematic diagram of the negative pressure pumping operation condition of the present invention;
FIG. 2 is a schematic illustration of the positive pressure drain operation of the present invention;
fig. 3 is a schematic view of the installation position of the water-air mixer of the present invention.
In the figure: 1. an air compressor; 2. a large air storage tank; 3. a small air storage tank; 4. a pressure water storage tank; 5. a pneumatic vacuum generator; 6. a third electromagnetic valve; 7. a first electromagnetic valve; 8. a one-way electromagnetic valve; 9. a second electromagnetic valve; 10. a negative pressure connecting pipeline; 11. a positive pressure connecting line; 12. a pressure detector; 13. a high level water level sensor; 14. a low water level sensor; 15. a water-gas mixer; 16. dewatering well.
Detailed Description
The invention is further described in connection with the following detailed description, in order to make the technical means, the creation characteristics, the achievement of the purpose and the effect of the invention easy to understand.
As shown in fig. 1-3, the device to be adopted in the pneumatic negative pressure pumping method disclosed by the invention mainly comprises an air compressor 1, a large-sized air storage tank 2, a small-sized air storage tank 3, a pressure water storage tank 4, a pneumatic vacuum generator 5 and a water-air mixer 15 arranged in a dewatering well 16;
the air compressor 1 is used for generating high-pressure air, the output end of the air compressor 1 is connected with the air inlet end of the large air storage tank 2 through a pipeline, the high-pressure air generated by the air compressor 1 is sent into the large air storage tank 2 for storage, the air outlet end of the large air storage tank 2 is respectively connected with the air inlet end of the air pressure vacuum generator 5 and the air inlet end of the small air storage tank 3 through pipelines, so that the small air storage tank 3 can be used for temporarily storing high-pressure air, in practice, air pressure detection equipment can be arranged in the large air storage tank 2 and the small air storage tank 3, an alarm is given when the pressure in the large air storage tank 2 and the small air storage tank 3 is reduced to a certain degree, and the compressed air of the air compressor 1 is started to recover the pressure in the large air storage tank 2 and the small air storage tank 3;
in the invention, only a single air compressor 1 is adopted as a power source, a plurality of devices are not needed to participate, noise pollution can be greatly reduced, and the devices can be installed in a concentrated way.
The top of the pressure water storage tank 4 is provided with a pressure detector 12 for detecting the pressure intensity in the pressure water storage tank 4 in real time, which is used for monitoring the pressure intensity in the pressure water storage tank 4 in real time so as to protect the pressure water storage tank 4 and prolong the service life of the pressure water storage tank 4, and in addition, the pressure water storage tank 4 is also provided with a high-level water level sensor 13 and a low-level water level sensor 14 which are used for detecting the water level height in the pressure water storage tank 4;
in addition, in the invention, the small air storage tank 3 is connected with the pressure water storage tank 4 through a connecting pipeline, and the connecting pipeline is provided with a third electromagnetic valve 6 in a matching way, which is used for controlling the on-off of the pipeline between the small air storage tank 3 and the pressure water storage tank 4, and when the pipeline is opened, the high-pressure air stored in the small air storage tank 3 can be conveyed into the pressure water storage tank 4 to improve the pressure in the pressure water storage tank 4, so that the water in the pressure water storage tank 4 is discharged through a drainage pipeline.
The air pressure vacuum generator 5 is fixedly arranged outside the pressure water storage tank 4, and the air in the pressure water storage tank 4 is pumped out through the high-pressure air auxiliary work of the conveying of the small air storage tank 3, so that negative pressure can be formed in the pressure water storage tank 4, a plurality of groups of negative pressure connecting pipelines 10 are fixedly connected to the outside of the pressure water storage tank 4, each group of negative pressure connecting pipelines 10 is provided with a first electromagnetic valve 7 in a matched mode, the negative pressure connecting pipelines 10 are connected with the water vapor mixer 15 arranged in the dewatering well 16, and water in the dewatering well 16 is sucked in under the state of being in negative pressure in the pressure water storage tank 4, so that the purpose of pumping water is achieved.
Further, the water-air mixer 15 is connected with the water-air mixer 15 through the positive pressure connecting pipeline 11, the small air storage tank 3 sends high-pressure air to the water-air mixer 15 in the dewatering well 16 in a dividing and multiplexing mode through the positive pressure connecting pipeline 11, so that water and air are mixed to form a water-air mixture, and the quality is reduced so as to facilitate the follow-up extraction.
The pneumatic negative pressure pumping method of the invention is further disclosed below in connection with specific embodiments.
Example 1
The embodiment mainly discloses a negative pressure pumping operation condition of the pneumatic negative pressure pumping method, which comprises the following specific steps:
s11, switching on a power supply of the air compressor 1, inputting the pressurized air into the large-sized air storage tank 2 for storage, and enabling high-pressure air to enter the small-sized air storage tank 3 and the air pressure vacuum generator 5 through pipelines respectively;
s12, the small air storage tank 3 sends high-pressure air into a water-air mixer 15 in a dewatering well 16 through a positive pressure connecting pipeline 11 in a dividing way, so that water and air are mixed to form a water-air mixture, and the quality of water is reduced;
s13, starting the pneumatic vacuum generator 5, sucking out air in the pressure water storage tank 4 by utilizing high-pressure gas conveyed by the small-sized gas storage tank 3, and forming negative pressure in the pressure water storage tank 4; in the process, the pressure in the pressure water storage tank 4 is detected in real time by a pressure detector 12 arranged at the top of the pressure water storage tank 4 so as to protect the pressure water storage tank 4;
specifically, the pressure detector 12 can be set to a highest pressure threshold according to the design specification of the pressure water storage tank 4, when the pressure in the pressure water storage tank 4 reaches or exceeds the highest pressure threshold, an alarm is sent, and at the moment, the third electromagnetic valve 6 arranged between the pressure water storage tank 4 and the small-sized air storage tank 3 can be closed to ensure that the pressure water storage tank 4 is not damaged;
s14, the water outlet end of the water-gas mixer 15 is connected with the pressure water storage tank 4 through a negative pressure connecting pipeline 10, and the water-gas mixture in the water-gas mixer 15 is sucked into the pressure water storage tank 4 under the condition that negative pressure is generated in the pressure water storage tank 4;
s15, the water in the dewatering well 16 is pumped out, the water level is lowered, the purpose of pumping water is achieved,
the advantages of this embodiment are: only a single power source of the air compressor is used, negative pressure power can be generated, and the power is provided by compressed air, so that the energy loss caused by the height difference is overcome; the active drainage is adopted, the drainage speed is high, water and gas are separated, and the water pumping quantity is convenient to measure; the whole pumping device has single power unit, is convenient to install and reduces noise pollution. The high-pressure gas is adopted to generate negative pressure through the vacuum generator, and the water tank can work normally even if no water exists.
Example 2
The embodiment mainly discloses a positive pressure drainage operation condition of the pneumatic negative pressure pumping method, which comprises the following specific steps:
s21, when the water level in the pressure water storage tank 4 exceeds a limit height, the air pressure vacuum generator 5 is closed, a third electromagnetic valve 6 arranged between the pressure water storage tank 4 and the small air storage tank 3 is opened, a first electromagnetic valve 7 and a one-way electromagnetic valve 8 are closed, and a second electromagnetic valve 9 for draining water is opened;
specifically, the water level in the pressurized water storage tank 4 is detected by the high water level sensor 13 and the low water level sensor 14 provided therein, and the above-mentioned limited height is the actual detected height of the high water level sensor 13.
S22, high-pressure gas in the small-sized gas storage tank 3 is sent into the pressure water storage tank 4, so that the pressure in the pressure water storage tank 4 is increased, after the second electromagnetic valve 9 is opened, water in the pressure water storage tank 4 is discharged from a water discharge pipeline under a high-pressure condition, and water discharge work can be completed;
s23, when the water level in the pressure water storage tank 4 is reduced to the height or is completely discharged, stopping conveying high-pressure gas into the pressure water storage tank 4, starting the pneumatic vacuum generator 5, and returning to the negative pressure pumping operation working condition when the pneumatic vacuum generator 5 pumps out the gas in the pressure water storage tank 4 to form negative pressure;
specifically, the low water level sensor 14 may be installed at the bottom of the pressure water storage tank 4, and is specifically configured to detect the lowest water level in the pressure water storage tank 4, and monitor the lowest water level in real time, that is, the actual water level detected by the low water level sensor 4 is the lowest water level.
It can be seen from the contents of the above embodiments 1 and 2 that the pneumatic negative pressure pumping method disclosed by the invention can repeatedly and circularly run between the negative pressure pumping working condition and the positive pressure drainage working condition, so as to ensure that water in the dewatering well 16 is pumped out, and the free switching between the two working conditions can be realized by adopting the same set of equipment.
The foregoing has shown and described the basic principles and main features of the present invention and the advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined in the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (8)
1. The pneumatic negative pressure pumping method is characterized by comprising two working states of a negative pressure pumping operation working condition and a positive pressure drainage operation working condition, wherein the negative pressure pumping operation working condition and the positive pressure drainage operation working condition are repeatedly and circularly operated to realize continuous pumping;
the negative pressure pumping operation working condition comprises the following specific steps:
s11, switching on a power supply of the air compressor (1), inputting the pressurized air into the large-sized air storage tank (2) for storage, and respectively enabling the high-pressure air to enter the small-sized air storage tank (3) and the air pressure vacuum generator (5) through pipelines;
s12, the small air storage tank (3) sends high-pressure air into a water-air mixer (15) in a dewatering well (16) through a positive pressure connecting pipeline (11) in a dividing way, so that water and air are mixed to form a water-air mixture;
s13, sucking air in the pressure water storage tank (4) by the air pressure vacuum generator (5) through high-pressure air conveyed by the small air storage tank (3), and forming negative pressure in the pressure water storage tank (4);
s14, the water outlet end of the water-gas mixer (15) is connected with the pressure water storage tank (4) through a negative pressure connecting pipeline (10), and the water-gas mixture in the water-gas mixer (15) is sucked into the pressure water storage tank (4) under the condition that negative pressure is generated in the pressure water storage tank (4);
s15, the water in the dewatering well (16) is pumped out, the water level is lowered, and the purpose of pumping water is achieved;
the specific steps of the positive pressure drainage operation condition are as follows:
s21, when the water level in the pressure water storage tank (4) exceeds a high water level, the air pressure vacuum generator (5) is closed;
s22, high-pressure gas in the small-sized gas storage tank (3) is sent into the pressure water storage tank (4), so that the pressure in the pressure water storage tank (4) is increased, and water in the pressure water storage tank (4) is discharged from a drainage pipeline under a high-pressure condition to finish drainage work;
s23, when the water level in the pressure water storage tank (4) is reduced to a low water level or is completely discharged, the high-pressure gas is stopped from being conveyed into the pressure water storage tank (4), the pneumatic vacuum generator (5) is started, the pneumatic vacuum generator (5) pumps the gas in the pressure water storage tank (4) to form negative pressure, and the negative pressure water pumping operation working condition is returned.
2. The pneumatic negative pressure pumping method of claim 1, wherein: the positive pressure connecting pipelines (11) are provided with a plurality of groups and are communicated with the air inlet end of the water-air mixer (15) and the air outlet end of the message air storage tank, and each group of positive pressure connecting pipelines (11) is provided with a first electromagnetic valve (7) in a matched mode.
3. The pneumatic negative pressure pumping method of claim 1, wherein: the negative pressure connecting pipelines (10) are provided with a plurality of groups and are communicated with the water-air mixer (15) and the pressure water storage tank (4), and each group of negative pressure connecting pipelines (10) is provided with a one-way electromagnetic valve (8) in a matched mode.
4. The pneumatic negative pressure pumping method of claim 1, wherein: the outside of pressure water storage tank (4) still is provided with the drainage pipe that is used for carrying out the drainage, and this drainage pipe is supporting to be provided with second electromagnetic valve (9) that are used for controlling drainage break-make.
5. The pneumatic negative pressure pumping method of claim 1, wherein: the top of the pressure water storage tank (4) is provided with a pressure detector (12) for detecting the pressure intensity in the pressure water storage tank (4) in real time.
6. The pneumatic negative pressure pumping method of claim 1, wherein: the output end of the air compressor (1) is connected with the air inlet end of the large air storage tank (2) through a pipeline, the air outlet end of the large air storage tank (2) is connected with the air inlet end of the air pressure vacuum generator (5) and the air inlet end of the small air storage tank (3) through pipelines respectively, and the small air storage tank (3) is connected with the pressure water storage tank (4) through a connecting pipeline.
7. The pneumatic negative pressure pumping method of claim 6, wherein: and a third electromagnetic valve (6) is arranged in a pipeline between the small air storage tank (3) and the pressure water storage tank (4) in a matching way.
8. The pneumatic negative pressure pumping method of claim 1, wherein: a high-level water level sensor (13) and a low-level water level sensor (14) are arranged in the pressure water storage tank (4).
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| CN202210632334.5A CN115110557B (en) | 2022-06-07 | 2022-06-07 | Pneumatic negative pressure pumping method |
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| CN202210632334.5A CN115110557B (en) | 2022-06-07 | 2022-06-07 | Pneumatic negative pressure pumping method |
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| CN115110557A CN115110557A (en) | 2022-09-27 |
| CN115110557B true CN115110557B (en) | 2023-11-03 |
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| JPH10290978A (en) * | 1997-04-18 | 1998-11-04 | Hitachi Plant Eng & Constr Co Ltd | Soil pollution purifying method and device therefor |
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| CN204530731U (en) * | 2015-01-05 | 2015-08-05 | 上海长凯岩土工程有限公司 | Super pressure inhales associating pumping system |
| CN110644464A (en) * | 2018-09-06 | 2020-01-03 | 连云港港口工程设计研究院有限公司 | Vacuum preloading drainage device with remote monitoring function |
| CN110939151A (en) * | 2019-12-27 | 2020-03-31 | 上海长凯岩土工程有限公司 | Water-vapor mixing system of super pressure-suction combined pumping system and working method thereof |
| CN113202122A (en) * | 2021-04-30 | 2021-08-03 | 中铁六局集团有限公司 | Foundation pit dewatering construction method based on super pressure suction combined pumping system |
| CN113293785A (en) * | 2021-06-15 | 2021-08-24 | 中铁一局集团(广州)建设工程有限公司 | Positive and negative pressure combined dewatering well structure with self-cleaning function and construction method |
-
2022
- 2022-06-07 CN CN202210632334.5A patent/CN115110557B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10290978A (en) * | 1997-04-18 | 1998-11-04 | Hitachi Plant Eng & Constr Co Ltd | Soil pollution purifying method and device therefor |
| JP2006341214A (en) * | 2005-06-10 | 2006-12-21 | Asahi Techno:Kk | Vacuum type aw method |
| CN204530731U (en) * | 2015-01-05 | 2015-08-05 | 上海长凯岩土工程有限公司 | Super pressure inhales associating pumping system |
| CN110644464A (en) * | 2018-09-06 | 2020-01-03 | 连云港港口工程设计研究院有限公司 | Vacuum preloading drainage device with remote monitoring function |
| CN110939151A (en) * | 2019-12-27 | 2020-03-31 | 上海长凯岩土工程有限公司 | Water-vapor mixing system of super pressure-suction combined pumping system and working method thereof |
| CN113202122A (en) * | 2021-04-30 | 2021-08-03 | 中铁六局集团有限公司 | Foundation pit dewatering construction method based on super pressure suction combined pumping system |
| CN113293785A (en) * | 2021-06-15 | 2021-08-24 | 中铁一局集团(广州)建设工程有限公司 | Positive and negative pressure combined dewatering well structure with self-cleaning function and construction method |
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| CN115110557A (en) | 2022-09-27 |
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