CN207437126U - A kind of shield end Precipitation Structure - Google Patents
A kind of shield end Precipitation Structure Download PDFInfo
- Publication number
- CN207437126U CN207437126U CN201721609451.0U CN201721609451U CN207437126U CN 207437126 U CN207437126 U CN 207437126U CN 201721609451 U CN201721609451 U CN 201721609451U CN 207437126 U CN207437126 U CN 207437126U
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- CN
- China
- Prior art keywords
- pump
- well
- pipe
- steel pipe
- shield
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model is related to subway shield tunnel construction technical fields, specially a kind of shield end Precipitation Structure, solve the problems, such as the shield end stratum of self-stable ability difference carry out precipitation processing when it is undesirable there are dewatering effect so that shield machine export ＆ import there are security risks, including dewatering well, immersible pump and vacuum pump, steel pipe is provided in dewatering well, steel pipe lower end is connected with filter pipe, immersible pump is provided in filter pipe, the upper end of steel pipe is connected with ring flange, well lid has been bolted in ring flange, preformed hole there are three being set on well lid, the water outlet of immersible pump is connected with outlet pipe, outlet pipe is connected with cistern through pump mouth, the water pump cable penetration cable aperture of immersible pump is connected with external power supply, vacuum pump is positioned close on the ground of dewatering well, the air-breathing working hole of vacuum pump is connected with well lid by pipeline and reserves air entry.The utility model increases pump capacity, can reach better dewatering effect, ensure that the safety of shield export ＆ import.
Description
Technical field
The utility model is related to subway shield tunnel construction technical fields, are specially a kind of shield end Precipitation Structure.
Background technology
At present, as the development of China's metro industry, the dynamics of construction persistently increase, a large amount of shield constructions are applied to ground
During iron is built.Shield launching and shield reception are all particularly important construction node and great wind in Analysis on Shield Tunnel Driven Process
It is dangerous, and the dewatering operation for originating, receiving tip position is the important leverage of shield-tunneling construction safety.Dewatering effect is good, then shield
Structure is into hole, appear all can be safer, is the stratum of the self-stable abilities differences such as tunneling boring silty sand ground especially in shield interval range,
Precipitation is particularly important.Conventional precipitation method digs a well according to drawing position, is drawn water with the immersible pump of enough lifts.
Shield well tip position section stratum for silty sand ground when the stratum of self-stable abilities difference using conventional method progress precipitation when, merely
Immersible pump precipitation can not influence the water content of dewatering well periphery soil layer so that the undesirable effect of dewatering effect passes in and out shield machine
Bury larger hidden danger in hole.
The content of the invention
There are precipitation effects in order to solve when the shield end stratum of self-stable ability difference carries out precipitation processing for the utility model
Fruit is undesirable so that shield machine export ＆ import provides a kind of shield end Precipitation Structure there are security hidden trouble.
The utility model is achieved by the following technical solution：
A kind of shield end Precipitation Structure, including dewatering well, immersible pump and vacuum pump are provided with steel pipe, steel in dewatering well
Pipe lower end is connected with filter pipe, and immersible pump is provided in filter pipe, and the upper end of steel pipe is connected with ring flange, and ring flange passes through bolt
Well lid is connected with, suction eye is provided on well lid, cable aperture and well lid reserve air entry, and the water outlet of immersible pump is connected with water outlet
Pipe, outlet pipe are connected with cistern through pump mouth, and the water pump cable penetration cable aperture of immersible pump is connected with external power supply, vacuum
Pump is positioned close on the ground of dewatering well, and the air-breathing working hole of vacuum pump is connected with well lid by pipeline and reserves air entry.
Steel pipe is arranged in the range of downward 5 meters of dewatering well well head, and steel pipe lower end is welded with filter pipe.
Filter pipe is bridge type filter pipe, and the caliber of filter pipe is identical with steel pipe caliber, two layers of filtering of package on the outside of filter pipe
Use Dense mesh screen.
After the suction eye and cable aperture of well lid extend through outlet pipe and water pump cable, joint gap is filled with fluid sealant.
The utility model provides a kind of shield end Precipitation Structure, including dewatering well, vacuum pump, immersible pump, well lid and
Other accessory kits.Pass through gas in vacuum pump pump drainage dewatering well so that vacuum is formed at steel pipe top so that ground on the outside of dewatering well
The water of layer is easier to flow under pressure by drainage pump drainage in dewatering well, while similar vacuum environment is formed in dewatering well,
It is equivalent to and reduces pump head, increase pump capacity, better dewatering effect can be reached, ensure that shield export ＆ import
Safety.
The utility model compared with prior art in only by immersible pump to dewatering well precipitation, have the advantages that：
1st, the utility model is set by increasing vacuum pump, and air in pump drainage dewatering well contributes to water flooding to flow to precipitation
In well, nearby underground water is easier drainage to dewatering well；
2nd, set, outside air discharge well, will be formed in vacuum well similar true in space in dewatering well by increasing vacuum pump
Altitude is equivalent to the lift for reducing dewatering well, increases precipitation well yield；
3rd, the utility model can reach preferable precipitation effect by the precipitation in the range of vacuum pump increase dewatering well
Fruit greatly reduces the risk of shield machine export ＆ import.
Description of the drawings
Fig. 1 is the structure diagram of the utility model；
Fig. 2 is the enlarged diagram of Fig. 1 superstructures；
Fig. 3 is the structure diagram of dewatering well in Fig. 1.
In figure：1- dewatering wells, 1.1- steel pipes, 1.2- filter pipes, 2- outlet pipes, 3- ring flanges, 4- well lids reserve air entry,
5- fluid sealants, 6- water pump cables, 7- ground, 8- well lids, 9- vacuum pumps, 10- immersible pumps.
Specific embodiment
The utility model is further elaborated with reference to Fig. 1~Fig. 3, a kind of shield end Precipitation Structure, including precipitation
Well 1, immersible pump 10 and vacuum pump 9 are provided with steel pipe 1.1 in dewatering well 1, and 1.1 lower end of steel pipe is connected with filter pipe 1.2, drainage
Immersible pump 10 is provided in pipe 1.2, the upper end of steel pipe 1.1 is connected with ring flange 3, and well lid 8 has been bolted in ring flange 3,
Suction eye is provided on well lid 8, cable aperture and well lid reserve air entry 4, and the water outlet of immersible pump 10 is connected with outlet pipe 2, goes out
Water pipe 2 is connected with cistern through suction eye, and the water pump cable 6 of immersible pump 10 is connected with external power supply, vacuum through cable aperture
Pump 9 is positioned close on the ground 7 of dewatering well 1, and the air-breathing working hole of vacuum pump 9 is connected with well lid by pipeline and reserves air entry
4。
Steel pipe 1.1 is arranged in the range of downward 5 meters of 1 well head of dewatering well, and 1.1 lower end of steel pipe is welded with filter pipe 1.2.Filter
Water pipe 1.2 is bridge type filter pipe, and the caliber of filter pipe 1.2 is identical with 1.1 caliber of steel pipe, 1.2 outside two layers of mistake of package of filter pipe
Filter Dense mesh screen.After the suction eye and cable aperture of well lid 8 extend through outlet pipe 2 and water pump cable 6, joint gap is filled with close
Sealing 5.
In order to solve conventional precipitation method when ideal effect is not achieved in end precipitation, portal is abolished and shield export ＆ import is equal
There are problems that greater risk, the application method of the utility model is：
Step 1 measures setting-out, the specific location got according to setting-out according to construction drawing to the position of dewatering well 1
Beat dewatering well；
Step 2, the top of dewatering well 1 is steel pipe 1.1, and 1.1 upper end of steel pipe is welded with ring flange 3, flange in pithead position
3 size of disk is adapted with well lid 8；
Step 3, the lower immersible pump 10 in dewatering well 1, immersible pump 10 tries to draw water after connecing electricity, determines the integrity of dewatering well 1
And pump working performance；
Step 4, the outlet pipe 2 of immersible pump 10, water pump cable 6 pass through the preformed hole on well lid 8, well lid 8 and ring flange 3
Between can be lined with rubber ring for sealing, blending bolt is attached, well lid is additionally provided on well lid and reserves air entry 4, is passed through
Pipeline is connected with the air entry of vacuum pump 9, and glass cement sealing is played in preformed hole root on well lid 8；
Step 5, the water inlet installation hose of vacuum pump 9, is externally attached to water source, ensures that vacuum pump has supplement water, power supply
Rear preliminary operation is connected, exhaust outlet has gas-liquid mixture discharge, and whether there is leakage between the excuse of manhole cover 8, ring flange 3, each water pipe
Gas；
Step 6 after vacuum pump 9 runs well, opens immersible pump 10 and carries out precipitation；
Wherein, 1 depth of dewatering well must pass through the reinforcing body of shield end, and the power of immersible pump 10 is 0.75kw, and lift is
80m, maximum stream flow 5m3/h；The model 2SK-0.8, maximum capacity 0.8m of vacuum pump 93/min。
Vacuum pump 9 must assure that the operation that could start shooting in the case where there is external complement water, otherwise can be not achieved and vacuumize
Effect.
Claims (4)
1. a kind of shield end Precipitation Structure, including dewatering well（1）, immersible pump（10）And vacuum pump（9）, it is characterised in that：Drop
Well（1）In be provided with steel pipe（1.1）, steel pipe（1.1）Lower end is connected with filter pipe（1.2）, filter pipe（1.2）In be provided with it is latent
Water pump（10）, steel pipe（1.1）Upper end be connected with ring flange（3）, ring flange（3）Well lid has been bolted（8）, well lid
（8）On be provided with suction eye, cable aperture and well lid reserve air entry（4）, immersible pump（10）Water outlet be connected with outlet pipe
（2）, outlet pipe（2）Cistern, immersible pump are connected with through suction eye（10）Water pump cable（6）It is connected with through cable aperture outer
Portion's power supply, vacuum pump（9）It is positioned close to dewatering well（1）Ground（7）On, vacuum pump（9）Air-breathing working hole pass through pipeline
It is connected with well lid and reserves air entry（4）.
2. a kind of shield end Precipitation Structure according to claim 1, it is characterised in that：Steel pipe（1.1）It is arranged on precipitation
Well（1）In the range of downward 5 meters of well head, steel pipe（1.1）Lower end is welded with filter pipe（1.2）.
3. a kind of shield end Precipitation Structure according to claim 1 or 2, it is characterised in that：Filter pipe（1.2）For bridge-type
Filter pipe, filter pipe（1.2）Caliber and steel pipe（1.1）Caliber is identical, filter pipe（1.2）Wrap up two layers of close mesh of filtering in outside
Net.
4. a kind of shield end Precipitation Structure according to claim 1, it is characterised in that：Well lid（8）Suction eye and electricity
Cable hole extends through outlet pipe（2）With water pump cable（6）Afterwards, joint gap is filled with fluid sealant（5）.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721609451.0U CN207437126U (en) | 2017-11-28 | 2017-11-28 | A kind of shield end Precipitation Structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721609451.0U CN207437126U (en) | 2017-11-28 | 2017-11-28 | A kind of shield end Precipitation Structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207437126U true CN207437126U (en) | 2018-06-01 |
Family
ID=62288071
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721609451.0U Expired - Fee Related CN207437126U (en) | 2017-11-28 | 2017-11-28 | A kind of shield end Precipitation Structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207437126U (en) |
-
2017
- 2017-11-28 CN CN201721609451.0U patent/CN207437126U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180601 Termination date: 20211128 |