CN218116404U

CN218116404U - Vacuum preloading drainage system

Info

Publication number: CN218116404U
Application number: CN202222034394.5U
Authority: CN
Inventors: 娄荣祥; 杜策; 张力; 叶怀文; 许渊
Original assignee: Shanghai Yuanfeng Underground Engineering Technology Co ltd
Current assignee: Shanghai Yuanfeng Underground Engineering Technology Co ltd
Priority date: 2022-08-03
Filing date: 2022-08-03
Publication date: 2022-12-23
Anticipated expiration: 2032-08-03

Abstract

The utility model provides a vacuum preloading drainage system, it is including setting up a plurality of no pipe precipitation wells, air compressor, connection in the stratum air compressor with the trachea system and the connection of a plurality of no pipe precipitation wells and the water piping system of outside drainage, no pipe precipitation well including set up in the well head in the well bore, respectively with drinking-water pipe and trachea that the well head is connected, the well head include the filtration storehouse and set up in the water air storehouse of filtration storehouse below, the filtration storehouse with the water air storehouse is linked together through a check valve, the one end setting of drinking-water pipe with the bottom of water air storehouse, the other end with the water piping system is linked together, tracheal one end set up in the top of water air storehouse, the other end with the trachea system is linked together, the check valve is in close when the atmospheric pressure in the water air storehouse rises, open when atmospheric pressure reduces. The technical scheme of the utility model the advantage that drainage efficiency is high has.

Description

Vacuum preloading drainage system

Technical Field

The utility model relates to a building engineering field specifically is a vacuum preloading drainage system.

Background

The vacuum preloading method is a foundation treatment method and is widely applied to soft foundation treatment projects such as sea filling and land reclamation. The principle is that a sealing film is paved on a soft soil foundation, water and gas in a horizontal cushion layer under the sealing film are pumped out through a vacuum pumping device to form negative pressure, meanwhile, water in a soil body is discharged by virtue of a plastic drainage plate constructed in the soil body in advance, and foundation soil is solidified, settled and reinforced. Vacuum preloading is common, but has its limitations.

Firstly, conventional vacuum preloading is carried out, underground water is upwards discharged from a deep part under the action of vacuum pressure difference, the vacuum degree is gradually attenuated in the process of transferring vacuum to a deep soil layer due to the gravity action of water, the vacuum action is reduced along with the increase and decrease of the depth, and the efficiency and the effect of drainage consolidation are influenced. Secondly, the water content of a large stratum is difficult to permeate upwards due to the action of gravity, the vertical permeability coefficient is small, and the drainage consolidation time is long.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a vacuum pre-compaction drainage system to improve drainage efficiency.

The embodiment of the utility model provides an in, provide a vacuum preloading drainage system, it is including setting up a plurality of no pipe precipitation wells in the stratum, setting up in the earth's surface and covering airtight film, air compressor, the connection of a plurality of no pipe precipitation wells air compressor with the trachea system and the connection of a plurality of no pipe precipitation wells and the water piping system of outside drainage, no pipe precipitation well including set up in downthehole well head, respectively with drinking-water pipe and the trachea that the well head is connected, the well head include the filter water storehouse and set up in the water air storehouse of filter water storehouse below, the filter water storehouse with the water air storehouse is linked together through a check valve, the one end setting of drinking-water pipe with the bottom in water air storehouse, the other end with the water piping system is linked together, tracheal one-way valve set up in the top in water air storehouse, the other end with the trachea system is linked together, the check valve is in closing when atmospheric pressure rises in the water air storehouse, opens when atmospheric pressure reduces.

In the embodiment of the utility model, the filter material is filled in the water filtering bin.

In the embodiment of the utility model provides an in, vacuum pre-compaction drainage system, still include with air compressor communication connection's intelligent control cabinet, intelligent control cabinet control air compressor bleeds and the air entrainment.

In the embodiment of the utility model provides an in, when air compressor bleeds, the check valve is opened, water in the filtration storehouse enters into the gas storehouse, during the air compressor air entrainment, the check valve is closed, water in the gas storehouse passes through under the effect of atmospheric pressure the trachea is discharged among the trachea system, and passes through the trachea system discharges.

In an embodiment of the present invention, the outlet of the water main is disposed on the airtight film.

In the embodiment of the present invention, the water pipe system includes a water main and a plurality of branch pipes respectively connected to the water main, the branch pipes are connected to the water pipes of the pipe-less dewatering well.

In the embodiment of the utility model, the trachea system include the total trachea and a plurality of respectively with the bronchus that the total trachea is linked together, the bronchus with the trachea of no pipe precipitation well is connected.

In the embodiment of the utility model provides an in, among the wellhole of no pipe precipitation well, it has filter material and clay still to fill.

Compared with the prior art, the vacuum preloading drainage system of the utility model is adopted, a plurality of pipeless dewatering wells are arranged in the stratum, the airtight films covering the pipeless dewatering wells are arranged on the ground surface, air is pumped to the pipeless dewatering wells through the air compressor, and the well head of the pipeless dewatering wells is arranged at the bottom of the well, so that the negative pressure vacuum effect can be applied to the deep part of the stratum and is transmitted to the periphery, the vacuum effect is enhanced, the loss of absorbing underground water is small, and the efficiency is high; in addition, compared with the traditional mode that the vacuum preloading method vertically acts on the ground with a single vacuum action, the method is improved in that the pressure is acted on the ground, the vacuum is also conveyed to a deep stratum through a water-gas separation technology, the pressure acts on the stratum through a horizontal channel, meanwhile, a drainage channel passively drains water from a single vertical direction to a vertical direction or a multi-direction active drainage of a downward direction and a horizontal direction, and the drainage efficiency is improved.

Drawings

Fig. 1 is a schematic structural view of a vacuum preloading drainage system according to an embodiment of the present invention.

Fig. 2 is a schematic structural view of a pipeless dewatering well according to an embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only 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 vacuum preloading drainage system is provided, which comprises a plurality of pipeless dewatering wells 1 disposed in the ground, an airtight film 12 disposed on the ground surface and covering the pipeless dewatering wells 1, an air compressor 9, an intelligent control cabinet 8 in communication connection with the air compressor 9, a gas pipe system (not identified) connecting the air compressor 9 and the pipeless dewatering wells, and a water pipe system (not identified) connecting the pipeless dewatering wells and draining water outwards. The tracheal system comprises a main trachea 6 and a plurality of bronchial tubes 4 respectively communicating with said main trachea 6. The water pipe system comprises a water main pipe 7 and a plurality of branch water pipes 5 which are respectively communicated with the water main pipe 7.

As shown in fig. 2, the pipeless dewatering well 1 comprises a well head 10 arranged in the well hole, a water pumping pipe 3 and an air pipe 4 respectively connected with the well head. The hole of the pipeless dewatering well 1 is also filled with filter materials 14 and clay 15. The wellhead 10 comprises a water filtering bin 16 and a water-gas bin 17 arranged below the water filtering bin 16, wherein the water filtering bin 16 is communicated with the water-gas bin 17 through a one-way valve 18. One end of the water pumping pipe 3 is arranged at the bottom of the water and gas bin 17, and the other end of the water pumping pipe is communicated with the water pipe system. One end of the air pipe 4 is arranged at the top of the water-air bin 17, and the other end of the air pipe is communicated with the air pipe system. And a filter material is filled in the water filtering bin and used for filtering underground water, and the filtered underground water is discharged into the water and gas bin through the one-way valve 18.

The intelligent control cabinet 8 controls the air compressor 9 to exhaust air and add air. The intelligent control cabinet 8 can through wired mode with air compressor 9 connects, also can through wireless mode with air compressor 9 connects, the utility model discloses do not restrict this.

When the air compressor 9 extracts air, the one-way valve 18 is opened, negative pressure caused by the extraction is transmitted to the wellhead 10, underground water enters the water filtering bin 1 under the action of the negative pressure, and water in the water filtering bin 16 enters the water gas bin 17. When the air compressor is filled with air, the one-way valve 18 is closed, and water in the water-air bin 17 is discharged into the air pipe system through the air pipe 2 under the action of air pressure and is discharged through the air pipe system.

In the embodiment of the present invention, the outlet of the water main 6 is disposed on the airtight film 12, so that the pumped groundwater can be directly discharged on the film 12, and the pressurized layer 11 is formed by the groundwater. The pressurizing layer 11 is influenced by gravity and acts on the undisturbed soil layer 13, so that the collection of underground water to the pipeless dewatering well 1 is accelerated, and the water pumping efficiency is improved. .

The utility model discloses vacuum preloading drainage system's implementation process as follows:

forming a hole by using equipment, putting the wellhead 10, the exhaust pipe 2 and the water pumping pipe 3 into the hole, filling filter materials 14 around the wellhead, and filling clay 15 on the upper part of the wellhead to form the pipeless dewatering well 1;

arranging enough pipeless dewatering wells 1 in the whole foundation pit field according to design requirements, and then laying an impervious film 12 covering the pipeless dewatering wells 1 on the ground surface;

the air pipe 2 is connected with the branch air pipe 4, the air compressor 9 is connected with the main air pipe, the water pumping pipe 3 is connected with the branch water pipe 5, and the water drainage ditch is connected with the main water pipe 7;

firstly, an intelligent control cabinet 8 automatically starts an air compressor 9 to start air extraction, negative pressure brought by air extraction is transmitted into each well head 10 through a main air pipe 6, a branch air pipe 4 and an air pipe 2, the negative pressure in the well heads 10 is transmitted into a stratum 13 through a filter material 14, and underground water in the stratum 13 enters the well heads 10;

after a period of time, the intelligent control cabinet 8 controls the air compressor 9 to add air, so that the pressure in the wellhead 10 rises, the check valve is arranged in the wellhead to prevent air pressure from diffusing into the stratum 13, and the underground water pumped in the previous stage in the wellhead 10 is discharged into the drainage ditch through the water pumping pipe 3, the branch water pipe 5 and the main water pipe 7 under high pressure. The above steps are repeated in a circulating way to achieve the effect of reducing the water content in the stratum 13, so that the stratum is consolidated and settled, namely, the soil body is consolidated.

To accelerate consolidated settlement of the soil 13, the pumped-up groundwater may be discharged directly above the membrane 12, forming a pressurized layer 11 from the groundwater. The pressurizing layer 11 is influenced by gravity and acts on the undisturbed soil layer 13, so that the collection of underground water to the pipeless dewatering well 1 is accelerated, and the water pumping efficiency is improved.

In conclusion, the vacuum preloading drainage system of the utility model is adopted, a plurality of pipeless dewatering wells are arranged in the stratum, the airtight films covering the pipeless dewatering wells are arranged on the ground surface, and the pipeless dewatering wells are pumped by the air compressor; in addition, compared with the traditional mode that the vacuum preloading method vertically acts on the ground with a single vacuum action, the method is improved in that the pressure is acted on the ground, the vacuum is also conveyed to the deep stratum through a water-gas separation technology, the pressure acts on the stratum through a horizontal channel, and meanwhile, the drainage channel passively drains water from a single vertical direction to the vertical direction.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not intended to limit the present invention, and any modifications, equivalents, improvements, etc. made within the spirit and principles of the present invention should be included within the scope of the present invention.

Claims

1. The utility model provides a vacuum preloading drainage system, its characterized in that, including set up a plurality of no pipe precipitation wells in the stratum, set up in the earth's surface and cover the airtight film of a plurality of no pipe precipitation wells, air compressor, connect air compressor with the gas piping system of a plurality of no pipe precipitation wells and the water piping system of connecting a plurality of no pipe precipitation wells and outside drainage, no pipe precipitation well is including setting up in the well head in the well bore, respectively with suction pipe and trachea that the well head is connected, the well head includes the drainage bin and set up in the water gas storehouse of drainage bin below, the drainage bin with the water gas storehouse is linked together through a check valve, the one end of suction pipe set up with the bottom of water gas storehouse, the other end with the water piping system is linked together, tracheal one end set up in the top of water gas storehouse, the other end with the gas piping system is linked together, the check valve is in the atmospheric pressure in the water gas storehouse rises and closes, opens when atmospheric pressure reduces.

2. The vacuum pre-compaction drainage system of claim 1, wherein the filter bin is filled with a filter material.

3. The vacuum preloading drainage system of claim 1, further comprising an intelligent control cabinet communicatively connected to the air compressor, the intelligent control cabinet controlling the air compressor to pump air and add air.

4. The vacuum preloading drainage system of claim 3, wherein the check valve is opened when the air compressor is pumping air, water in the filtered water bin enters the water and gas bin, the check valve is closed when the air compressor is pumping air, and water in the water and gas bin is discharged into the air pipe system through the air pipe and is discharged through the air pipe system under the action of air pressure.

5. The vacuum preloading drainage system of claim 1, wherein the water piping system comprises a water main and a plurality of branch pipes respectively communicating with the water main, the branch pipes being connected with the water pipes of the pipeless dewatering well.

6. The vacuum preloading drainage system of claim 5, wherein the water outlet of the water main is provided on the air-impermeable film.

7. The vacuum preloading drainage system of claim 1, wherein the air pipe system includes a main air pipe and a plurality of branch air pipes respectively communicating with the main air pipe, the branch air pipes being connected with the air pipes of the pipeless dewatering well.

8. The vacuum preloading drainage system of claim 1, wherein the well bore of the pipeless dewatering well is further filled with filter material and clay.