CN213979009U - Well point dewatering device - Google Patents
Well point dewatering device Download PDFInfo
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- CN213979009U CN213979009U CN202022545918.8U CN202022545918U CN213979009U CN 213979009 U CN213979009 U CN 213979009U CN 202022545918 U CN202022545918 U CN 202022545918U CN 213979009 U CN213979009 U CN 213979009U
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- dewatering well
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Abstract
The invention provides a well point dewatering device which comprises a dewatering well, a gas pumping/injecting pipeline communicated with the dewatering well, a water discharging pipe communicated with the dewatering well and a gas pumping/injecting device arranged outside the dewatering well, wherein one end of the gas pumping/injecting pipeline is arranged in the dewatering well and close to the top of the dewatering well, the other end of the gas pumping/injecting pipeline is connected with the gas pumping/injecting device, one end of the water discharging pipe is arranged at the bottom of the dewatering well, the other end of the water discharging pipe is arranged outside the dewatering well, a groundwater seepage device is arranged on the side wall of the dewatering well, the groundwater seepage device is communicated with the dewatering well through a seepage one-way valve, the seepage one-way valve is opened when the gas pumping/injecting device pumps gas, and is closed when the gas is injected. By adopting the technical scheme of the invention, the underground water collection and discharge can be accelerated.
Description
Technical Field
The invention relates to the field of constructional engineering, in particular to a well point dewatering device.
Background
At present, underground projects such as highway tunnels, subways, underground pipe networks and the like built and proposed in China are increasing day by day, the projects can not pass through sections with complicated project hydrogeological conditions, and an underground water seepage field is in a dynamic balance state before the underground projects are built. Along with the excavation of the underground engineering and the formation of the near empty surface, underground water is collected and seeped to the near empty surface to form underground engineering excavation surface seepage water, if effective water collecting and draining measures are not taken, the rock surface fissure seepage water is drained to a drainage ditch of the underground engineering, the seepage water is gathered after the supporting lining wall, the water pressure is increased, the supporting body structure is damaged, and the seepage water generated by the engineering structure and the service life are greatly reduced; meanwhile, the underground engineering supporting and waterproof construction is carried out under the condition of large-area water seepage, the construction quality cannot be guaranteed, and the underground engineering is easy to have water seepage in the operation process.
At present, precipitation wells arranged at certain intervals are generally adopted in the industry for precipitation, underground water is introduced into the precipitation wells, and then water in the precipitation wells is pumped out through a water pump. However, the water is pumped by the water pump, and the deep well pumping cannot be carried out due to the limited lift of the water pump; in addition, the dewatering effect of the dewatering well is poor because the waiting time is long because the groundwater can only be slowly infiltrated into the dewatering well.
Disclosure of Invention
The invention aims to provide a well point dewatering device, so that the dewatering and drainage effects of a dewatering well are improved.
The embodiment of the invention provides a well point dewatering device which comprises a dewatering well, a pumping/gas injection pipeline communicated with the dewatering well, a drain pipe communicated with the dewatering well and a pumping/gas injection device arranged outside the dewatering well, wherein one end of the pumping/gas injection pipeline is arranged in the dewatering well and close to the top of the dewatering well, the other end of the pumping/gas injection pipeline is connected with the pumping/gas injection device, one end of the drain pipe is arranged at the bottom of the dewatering well, the other end of the drain pipe is arranged outside the dewatering well, a groundwater seepage device is arranged on the side wall of the dewatering well, the groundwater seepage device is communicated with the dewatering well through a seepage one-way valve, and the seepage one-way valve is opened when the pumping/gas injection device pumps or injects gas and is closed when the pumping/gas injection device pumps or injects gas.
In the embodiment of the invention, a drainage check valve is further arranged at the drainage outlet of the drainage pipe, and the drainage check valve is closed when the air pumping/injecting device performs air pumping and is opened when injecting air.
In the embodiment of the invention, the dewatering well further comprises a wellhead sealing device for sealing the dewatering well, and the gas pumping/injecting pipeline and the water discharging pipe respectively penetrate through the wellhead sealing device to be communicated with the dewatering well.
In the embodiment of the invention, the underground water seepage device adopts a separated type filter pipe.
In the embodiment of the invention, the well point dewatering device further comprises an air pressure detection device arranged at the wellhead of the dewatering well and used for detecting the air pressure in the dewatering well.
The embodiment of the invention also provides an operation method of the well point dewatering device, which is characterized in that,
and controlling the air pumping/injecting device to perform air pumping or injecting actions according to the air pressure change in the dewatering well, and discharging water in the dewatering well through the drain pipe.
In the embodiment of the invention, the operation method of the well point dewatering device specifically comprises the following steps:
controlling the air pumping/injecting device to pump air until the air pressure in the precipitation well is reduced to a set value;
and waiting for a period of time until the pressure in the dewatering well rises to the standard atmospheric pressure, controlling the gas pumping/injecting device to inject gas, and discharging the water in the dewatering well through the drain pipe.
In an embodiment of the present invention, the operation method of the well point dewatering device further includes:
and when the air pressure in the precipitation well is reduced to the standard atmospheric pressure after the water in the precipitation well is discharged through the drain pipe, controlling the air pumping/injecting device to pump air.
Compared with the prior art, by adopting the well point dewatering device, when the pumping/gas injection device pumps gas, the seepage one-way valve is opened, the water discharge valve is closed, underground water flows into the dewatering well through the seepage device in an accelerated manner under the action of the gas pressure, and when the gas pressure in the dewatering well is not changed any more, the pumping/gas injection device is controlled to inject gas, the seepage one-way valve is closed, the water discharge valve is opened, water in the dewatering well is discharged through the water discharge pipe, after the water in the dewatering well is discharged through the water discharge pipe, the pumping/gas injection device is controlled to pump gas, and the actions are repeated, so that the underground water can be discharged through the dewatering well quickly.
Drawings
Fig. 1 is a schematic view of the structure of a well point precipitation device according to an embodiment of the present invention.
Fig. 2 is a flow chart of the operation of a well point precipitation device of an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The following describes the implementation of the present invention in detail with reference to specific embodiments.
As shown in fig. 1, in the embodiment of the present invention, a well point dewatering device is provided, which includes a dewatering well 1, a gas pumping/injecting pipeline 2 communicated with the dewatering well 1, a water discharging pipe 3 communicated with the dewatering well 1, and a gas pumping/injecting device 4 disposed outside the dewatering well 1.
The dewatering well 1 is arranged underground and used for collecting underground water. The dewatering well 1 further comprises a wellhead sealing device 11 for sealing the dewatering well 1, and the gas pumping/injecting pipeline 2 and the drain pipe 3 respectively penetrate through the wellhead sealing device 11 to be communicated with the dewatering well 1. And a groundwater seepage device 12 is arranged on the side wall of the dewatering well 1 and used for collecting groundwater. The groundwater seepage device 12 is communicated with the precipitation well 1 through a seepage one-way valve 13. The groundwater seepage device 12 may adopt a separation type water filtering pipe, or may adopt other water filtering devices.
One end of the gas pumping/injecting pipeline 2 is arranged in the dewatering well 1 at a position close to the top of the dewatering well 1, and the other end of the gas pumping/injecting pipeline is connected with the gas pumping/injecting device 4. One end of the drain pipe 3 is arranged at the bottom of the dewatering well 1, and the other end of the drain pipe is arranged outside the dewatering well 1 and used for discharging the underground water collected in the dewatering well 1 out of the dewatering well 1. A drain check valve 31 is also arranged at the drain outlet of the drain pipe 3,
the gas pumping/injecting device 4 is disposed on the ground, and is configured to inject gas into the precipitation well 1, or pump gas from the precipitation well 1, and change the gas pressure in the precipitation well, so as to cause the pressure on both sides of the seepage check valve 13 and the pressure on both sides of the drainage check valve 31 to be inconsistent, such that the seepage check valve 13 is opened when the gas pumping/injecting device 4 pumps gas, and is closed when gas injects gas, and the drainage check valve 31 is closed when the gas pumping/injecting device 4 pumps gas, and is opened when gas injects gas.
Further, in the embodiment of the present invention, the well point dewatering device further includes an air pressure detection device 5 disposed at a wellhead of the dewatering well, and configured to detect air pressure in the dewatering well 1, so that the working state of the gas pumping/injecting device 4 can be controlled according to the air pressure in the dewatering well 1, so as to control operation of the well point dewatering device. The air pressure detection device 5 can adopt a vacuum gauge and a pressure gauge.
As shown in fig. 2, the operation process of the well point dewatering device specifically includes:
controlling the air pumping/injecting device 4 to pump air until the air pressure in the precipitation well is reduced to a set value;
waiting for a period of time until the air pressure in the dewatering well 1 rises to the standard atmospheric pressure, controlling the air pumping/injecting device 4 to inject air, increasing the air pressure in the dewatering well 1, and discharging the water in the dewatering well 1 through the drain pipe 3;
when the air pressure in the dewatering well 1 is reduced to the standard atmospheric pressure after the water in the dewatering well 1 is discharged through the drain pipe 3, the air pumping/injecting device 4 is controlled to pump air.
By repeating the above processes, the groundwater can be rapidly collected and discharged.
In summary, with the well point dewatering device of the present invention, when the pumping/injecting device pumps air, the seepage check valve is opened, the drain valve is closed, groundwater flows into the dewatering well through the seepage device at an accelerated speed under the action of air pressure, and when the air pressure in the dewatering well does not change any more, the pumping/injecting device is controlled to inject air, the seepage check valve is closed, the drain valve is opened, water in the dewatering well is discharged through the drain pipe, and after the water in the dewatering well is discharged through the drain pipe, the pumping/injecting device is controlled to pump air to repeat the above actions, so that groundwater can be discharged through the dewatering well quickly.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (5)
1. The utility model provides a well point dewatering device, its characterized in that, including the dewatering well, with the pump drainage/gas injection pipeline that the dewatering well is linked together, with the drain pipe that the dewatering well is linked together and set up in pump drainage/gas injection device outside the dewatering well, the one end of pump drainage/gas injection pipeline set up in be close to in the dewatering well the position at dewatering well top, the other end with pump drainage/gas injection device is connected, the one end of drain pipe set up in the dewatering well bottom, the other end set up in the dewatering well outside, be provided with groundwater seepage flow device on the lateral wall of dewatering well, just groundwater seepage flow device through seepage flow check valve with the dewatering well is linked together, seepage flow check valve is in pump drainage/gas injection device opens when bleeding, closes during the gas injection.
2. The well point dewatering device according to claim 1, wherein a drain check valve is further provided at a drain port of the drain pipe, and the drain check valve is closed when the gas pumping/injecting device pumps gas and is opened when the gas pumping/injecting device injects gas.
3. The well point dewatering apparatus of claim 2, wherein the dewatering well further comprises a wellhead sealing device for sealing the dewatering well, the gas pumping/injecting pipeline and the water drainage pipe respectively communicating with the dewatering well through the wellhead sealing device.
4. The well point dewatering apparatus of claim 2, wherein the groundwater seepage apparatus employs separate strainer pipes.
5. The well point dewatering apparatus of claim 2, further comprising an air pressure detection device disposed at a wellhead of the dewatering well for detecting air pressure within the dewatering well.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022545918.8U CN213979009U (en) | 2020-11-06 | 2020-11-06 | Well point dewatering device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022545918.8U CN213979009U (en) | 2020-11-06 | 2020-11-06 | Well point dewatering device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213979009U true CN213979009U (en) | 2021-08-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022545918.8U Active CN213979009U (en) | 2020-11-06 | 2020-11-06 | Well point dewatering device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213979009U (en) |
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2020
- 2020-11-06 CN CN202022545918.8U patent/CN213979009U/en active Active
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Address after: 201600 Building 1, 1128 Wenhui Road, Songjiang District, Shanghai Patentee after: SHANGHAI YUANFENG UNDERGROUND ENGINEERING TECHNOLOGY Co.,Ltd. Address before: Room 307, building 16, 4588 Honghai Road, Sanxing Town, Chongming District, Shanghai 202152 Patentee before: SHANGHAI YUANFENG UNDERGROUND ENGINEERING TECHNOLOGY Co.,Ltd. |
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