CN112627776A - Negative pressure well group dewatering construction method for shield subway starting receiving well - Google Patents
Negative pressure well group dewatering construction method for shield subway starting receiving well Download PDFInfo
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- CN112627776A CN112627776A CN202011398953.XA CN202011398953A CN112627776A CN 112627776 A CN112627776 A CN 112627776A CN 202011398953 A CN202011398953 A CN 202011398953A CN 112627776 A CN112627776 A CN 112627776A
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- 238000010276 construction Methods 0.000 title claims abstract description 26
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 108
- 238000005086 pumping Methods 0.000 claims abstract description 34
- 238000007789 sealing Methods 0.000 claims abstract description 20
- 238000000034 method Methods 0.000 claims abstract description 14
- 239000002689 soil Substances 0.000 claims abstract description 10
- 238000011010 flushing procedure Methods 0.000 claims abstract description 5
- 239000000463 material Substances 0.000 claims abstract description 5
- 238000012360 testing method Methods 0.000 claims abstract description 5
- 238000005406 washing Methods 0.000 claims abstract description 5
- 238000005070 sampling Methods 0.000 claims abstract description 4
- 238000004080 punching Methods 0.000 claims description 15
- 229910000831 Steel Inorganic materials 0.000 claims description 12
- 239000010959 steel Substances 0.000 claims description 12
- 229920001971 elastomer Polymers 0.000 claims description 5
- 238000003466 welding Methods 0.000 claims description 5
- 238000012544 monitoring process Methods 0.000 claims description 4
- 230000000740 bleeding effect Effects 0.000 claims description 3
- 238000009826 distribution Methods 0.000 claims description 3
- 230000009977 dual effect Effects 0.000 claims description 3
- 239000000565 sealant Substances 0.000 claims description 3
- 238000004062 sedimentation Methods 0.000 claims description 3
- 238000005507 spraying Methods 0.000 claims description 3
- 230000002528 anti-freeze Effects 0.000 claims description 2
- 238000001556 precipitation Methods 0.000 abstract description 7
- 238000013461 design Methods 0.000 abstract description 2
- 239000010419 fine particle Substances 0.000 abstract description 2
- 238000005457 optimization Methods 0.000 abstract description 2
- 229920006395 saturated elastomer Polymers 0.000 abstract description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 229910000746 Structural steel Inorganic materials 0.000 description 1
- 239000002390 adhesive tape Substances 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000003566 sealing material Substances 0.000 description 1
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/12—Methods or apparatus for controlling the flow of the obtained fluid to or in wells
- E21B43/121—Lifting well fluids
-
- 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
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/02—Surface sealing or packing
- E21B33/03—Well heads; Setting-up thereof
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/02—Subsoil filtering
- E21B43/04—Gravelling of wells
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B6/00—Drives for drilling with combined rotary and percussive action
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/18—Drilling by liquid or gas jets, with or without entrained pellets
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/20—Driving or forcing casings or pipes into boreholes, e.g. sinking; Simultaneously drilling and casing boreholes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B47/00—Pumps or pumping installations specially adapted for raising fluids from great depths, e.g. well pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/02—Stopping, starting, unloading or idling control
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/06—Control using electricity
- F04B49/065—Control using electricity and making use of computers
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Physics & Mathematics (AREA)
- Geochemistry & Mineralogy (AREA)
- Fluid Mechanics (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Hydrology & Water Resources (AREA)
- Structural Engineering (AREA)
- Civil Engineering (AREA)
- Paleontology (AREA)
- Computer Hardware Design (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
The invention relates to the technical field of shield wells, in particular to a negative pressure well group dewatering construction method for a shield subway originating receiving well. S1, forming holes by a water flushing method; s2, lowering the well pipe; s3, righting the well pipe and filling filter materials; s4, washing the well; s5, installing a wellhead sealing structure; s6, building a circular well chamber; s7, installing a water pump, a vacuum pump and a water tank; s8, performing a sampling test; and S9, continuously pumping water. The construction method solves the problem of draining the residual water at the interface of the fine-particle weak permeable saturated soil layer and the aquifer, and simultaneously, the construction method carries out design optimization on the positions of the foundation pit dewatering well group, so that the integral dewatering efficiency of the foundation pit is improved. The invention is mainly applied to the negative pressure well group precipitation of the shield subway starting receiving well.
Description
Technical Field
The invention relates to the technical field of shield wells, in particular to a negative pressure well group dewatering construction method for a shield subway originating receiving well.
Background
In the process of underground space engineering development, due to the fact that original states of foundation soil and underground water are changed, engineering accidents caused by improper precipitation or failure can cause environmental damage problems such as ground surface collapse around a foundation pit, pipeline breakage, building inclination and the like. Traditional tube well precipitation adopts gravity type free precipitation, and is inefficient, poor in effect, limited in precipitation depth, and not suitable for lower foundation pit precipitation of permeability.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention provides the negative pressure well group dewatering construction method for the shield subway starting receiving well.
In order to solve the technical problems, the technical scheme adopted by the invention is that
A negative pressure well group dewatering construction method for a shield subway starting receiving well comprises the following steps:
s1, forming holes by a water flushing method;
s2, lowering the well pipe;
s3, righting the well pipe and filling filter materials;
s4, washing the well;
s5, installing a wellhead sealing structure;
s6, building a circular well chamber;
s7, installing a water pump, a vacuum pump and a water tank;
s8, performing a sampling test;
and S9, continuously pumping water.
In step S1, when punching, the high pressure water pump is connected to the hole by the high pressure rubber pipe, the punching pipe is hoisted by the hoisting device and inserted into the well, the high pressure water is impacted by the small water spraying hole at the head of the main punching pipe, and the punching pipe is rotated up and down and left and right to sink while punching, thereby forming a hole in the soil gradually.
In the step S2, a steel support is placed at the wellhead, the well casing is lowered section by means of steel cable bottom hanging, and the steel cable is pulled out after the well casing is lowered to the bottom of the well.
In the step S4, an air compressor is used to wash the well.
In the step S5, digging out soil near the dewatering well pipe and removing redundant well pipes; welding a lower flange sheet at the position extending out of the well pipe; the water pumping pipe, the air pipe, the water level monitoring sensor and the electric wire penetrate through the upper flange sheet, and the upper flange sheet and the lower flange sheet are firmly fixed by using bolts and sealing rubber pads; and sealing and filling the cavity of the upper flange plate by using sealant.
In the step S6, the circular well chamber is built around the wellhead sealing structure, and the elevation of the well chamber is flush with the ground of the site.
In the step S7, a hole is reserved in the well, a groove is dug according to the site conditions, a water pumping pipe, an air pumping pipe and a cable are buried, the water pumping pipe is led to the sedimentation tank, the air pumping pipe and the cable are led to the corresponding power distribution area, the pipeline enters the well from the hole reserved in the well and is connected to the corresponding interface of the sealing cover, and the water pump is placed to the bottom of the well after the cable passes through the cable hole and is connected with the water pump; connect the ball valve on the water level observation interface of sealed lid, install the vacuum gauge on the vacuum gauge interface of sealed lid, at the subaerial vacuum pump and the water tank of installing of well head, the air inlet of vacuum pump passes through exhaust tube and the interface connection of bleeding on the sealed lid, debugging water pump and vacuum pump.
During winter construction, an antifreeze is added into the water tank.
In the step S9, water pumping adopts a water level and vacuum degree dual control system, 4 indexes of an upper limit and a lower limit of a water level and an upper limit and a lower limit of a vacuum degree are set, when the water level rises to exceed the upper limit of the water level, a power supply of a water pump is switched on, water pumping is started, the water level is reduced due to water pumping, when the water level is lower than the lower limit, the power supply of the water pump is switched off, water pumping is stopped, the vacuum degree in the well is judged, and if; if the vacuum degree is higher than the upper limit, the vacuum pump is not started.
Compared with the prior art, the invention has the beneficial effects that:
the well pipe above the underground water level adopts cast iron dead pipe, the well sealing material adopts clay or loess, the connecting part of the flange and the well pipe adopts welding and other sealing measures, the air tightness of the negative pressure well group dewatering process is effectively ensured, the construction process is simple, and the efficiency is high; the water level observation hole is formed in the upper disc of the flange plate, and a water level observation system is adopted, so that compared with the traditional manual water level measurement, the real-time monitoring of the mobile end of the mobile phone can be realized, the observation of the water level is greatly facilitated, the labor cost is saved, and the popularization is easy; vacuum pump water pitcher passes through angle iron stand and places in the vacuum pump top, and the efficient has utilized the space in place when guaranteeing the normal function of vacuum pump, and is little to the foundation ditch excavation construction influence.
The construction method adopts a vacuum negative pressure method to improve the dewatering efficiency, forms a vacuum tube well dewatering process, has good dewatering effect, effectively improves the dewatering depth, has wider application range, and is favorable for solving the problem of draining the residual water on the interface of the fine-particle weak permeable saturated soil layer and the aquifer. Meanwhile, the construction method carries out design optimization on the positions of the foundation pit dewatering well group, and improves the integral dewatering efficiency of the foundation pit.
Drawings
FIG. 1 is a schematic view of the construction process of the present invention;
FIG. 2 is a schematic diagram of the water pumping control of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1 to 2, the negative pressure well group dewatering method for the shield subway originating receiving well comprises the following steps:
s1, forming holes by a water flushing method;
s2, lowering the well pipe;
s3, righting the well pipe and filling filter materials;
s4, washing the well;
s5, installing a wellhead sealing structure;
s6, building a circular well chamber;
s7, installing a water pump, a vacuum pump and a water tank;
s8, performing a sampling test;
and S9, continuously pumping water.
Preferably, in step S1, the high pressure water pump is connected to the hole by the high pressure hose during punching, the punching pipe is hoisted by the hoisting device and inserted into the well, the high pressure water is impacted by the small water spraying hole at the head of the main punching pipe to impact the soil with rapid jet, and the punching pipe is rotated up and down and left and right to sink while punching, thereby forming a hole in the soil gradually.
Preferably, in step S2, a steel support is placed at the wellhead, the well casing is lowered section by means of steel cable bottom hanging, after the well casing is lowered to the bottom of the well, the steel cable is drawn out, and a sand filter layer is filled between the well point pipe and the wall of the hole to prevent the wall of the hole from collapsing. The well pipe is formed by coaxially butting a plurality of sections of cement dead pipes, and a polyethylene film is wound for 3-5 circles at each butting position and is firmly bound by a wide adhesive tape.
Preferably, in step S4, the well is washed for several hours by using an air compressor.
Preferably, in step S5, the soil near the dewatering well casing is dug out, and the excess casing is removed; welding a lower flange sheet at the position extending out of the well pipe; a water pumping pipe, an air pipe, a water level monitoring sensor, an electric wire and the like penetrate through the upper flange sheet, and the upper flange sheet and the lower flange sheet are firmly fixed by using bolts and sealing rubber pads; and sealing and filling the cavity of the upper flange plate by using sealant. Because the vacuum seal is adopted, the water level can not be directly measured like a common precipitation well, so a water level observation system is adopted
Preferably, in step S6, a circular well chamber is built around the wellhead sealing structure, and the well chamber elevation is flush with the ground level.
Preferably, in step S7, a hole is reserved in the well, a trench is dug in accordance with site conditions, a water pumping pipe, an air pumping pipe and a cable are buried, the water pumping pipe is led to the sedimentation tank, the air pumping pipe and the cable are led to a corresponding power distribution area, the pipeline enters the well from the hole reserved in the well and is connected to a corresponding interface of the sealing cover, and after the cable passes through the cable hole and is connected with the water pump, the water pump is lowered to the bottom of the well; connect the ball valve on the water level observation interface of sealed lid, install the vacuum gauge on the vacuum gauge interface of sealed lid, at the subaerial vacuum pump and the water tank of installing of well head, the air inlet of vacuum pump passes through exhaust tube and the interface connection of bleeding on the sealed lid, debugging water pump and vacuum pump.
Preferably, an anti-freezing agent is added to the water tank during winter construction.
Preferably, in step S9, a water level and vacuum degree dual control system is used for pumping water, 4 indexes of an upper limit and a lower limit of the water level and an upper limit and a lower limit of the vacuum degree are set, when the water level rises above the upper limit of the water level, a power supply of the water pump is switched on, water pumping is started, the water level is reduced due to water pumping, when the water level is lower than the lower limit, the power supply of the water pump is switched off, water pumping is stopped, the vacuum degree in the well is judged, and if the; if the vacuum degree is higher than the upper limit, the vacuum pump is not started.
The method comprises the steps of forming holes at a designated position by a water flushing method; placing a steel bracket at the wellhead part, and lowering the well pipe section by a steel cable bottom-hanging method; after the well pipe is put to the bottom of the well, the steel cable is drawn out; righting the well pipe and filling filter materials; washing the well by adopting an air compressor; welding a sealing flange sheet and installing a wellhead sealing structure; building a circular well chamber around the wellhead sealing structure, wherein the elevation of the well chamber is flush with the ground of the field; and installing a water pump, a vacuum pump and a water tank. After the work is finished, a pumping test is carried out to check whether the air leakage phenomenon exists or not, and after the check is correct, a control system is used for continuously pumping water. Meanwhile, in winter construction, an antifreezing agent is added into the water tank.
Although only the preferred embodiments of the present invention have been described in detail, the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art, and all changes are encompassed in the scope of the present invention.
Claims (9)
1. The negative pressure well group dewatering construction method for the shield subway starting receiving well is characterized by comprising the following steps of:
s1, forming holes by a water flushing method;
s2, lowering the well pipe;
s3, righting the well pipe and filling filter materials;
s4, washing the well;
s5, installing a wellhead sealing structure;
s6, building a circular well chamber;
s7, installing a water pump, a vacuum pump and a water tank;
s8, performing a sampling test;
and S9, continuously pumping water.
2. The negative-pressure well group dewatering construction method for the shield subway originating receiving well, according to claim 1, is characterized in that: in step S1, when punching, the high pressure water pump is connected to the hole by the high pressure rubber pipe, the punching pipe is hoisted by the hoisting device and inserted into the well, the high pressure water is impacted by the small water spraying hole at the head of the main punching pipe, and the punching pipe is rotated up and down and left and right to sink while punching, thereby forming a hole in the soil gradually.
3. The negative-pressure well group dewatering construction method for the shield subway originating receiving well, according to claim 1, is characterized in that: in the step S2, a steel support is placed at the wellhead, the well casing is lowered section by means of steel cable bottom hanging, and the steel cable is pulled out after the well casing is lowered to the bottom of the well.
4. The negative-pressure well group dewatering construction method for the shield subway originating receiving well, according to claim 1, is characterized in that: in the step S4, an air compressor is used to wash the well.
5. The negative-pressure well group dewatering construction method for the shield subway originating receiving well, according to claim 1, is characterized in that: in the step S5, digging out soil near the dewatering well pipe and removing redundant well pipes; welding a lower flange sheet at the position extending out of the well pipe; the water pumping pipe, the air pipe, the water level monitoring sensor and the electric wire penetrate through the upper flange sheet, and the upper flange sheet and the lower flange sheet are firmly fixed by using bolts and sealing rubber pads; and sealing and filling the cavity of the upper flange plate by using sealant.
6. The negative-pressure well group dewatering construction method for the shield subway originating receiving well, according to claim 1, is characterized in that: in the step S6, the circular well chamber is built around the wellhead sealing structure, and the elevation of the well chamber is flush with the ground of the site.
7. The negative-pressure well group dewatering construction method for the shield subway originating receiving well, according to claim 1, is characterized in that: in the step S7, a hole is reserved in the well, a groove is dug according to the site conditions, a water pumping pipe, an air pumping pipe and a cable are buried, the water pumping pipe is led to the sedimentation tank, the air pumping pipe and the cable are led to the corresponding power distribution area, the pipeline enters the well from the hole reserved in the well and is connected to the corresponding interface of the sealing cover, and the water pump is placed to the bottom of the well after the cable passes through the cable hole and is connected with the water pump; connect the ball valve on the water level observation interface of sealed lid, install the vacuum gauge on the vacuum gauge interface of sealed lid, at the subaerial vacuum pump and the water tank of installing of well head, the air inlet of vacuum pump passes through exhaust tube and the interface connection of bleeding on the sealed lid, debugging water pump and vacuum pump.
8. The negative-pressure well group dewatering construction method for the shield subway originating receiving well, according to claim 7, is characterized in that: during winter construction, an antifreeze is added into the water tank.
9. The negative-pressure well group dewatering construction method for the shield subway originating receiving well, according to claim 1, is characterized in that: in the step S9, a water level and vacuum degree dual control system is adopted for pumping water, 4 indexes of an upper limit and a lower limit of a water level and an upper limit and a lower limit of a vacuum degree are set, when the water level rises to exceed the upper limit of the water level, a power supply of a water pump is switched on, water pumping is started, the water level is reduced due to water pumping, when the water level is lower than the lower limit, the power supply of the water pump is switched off, water pumping is stopped, the vacuum degree in the well is judged, and; if the vacuum degree is higher than the upper limit, the vacuum pump is not started.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011398953.XA CN112627776A (en) | 2020-12-01 | 2020-12-01 | Negative pressure well group dewatering construction method for shield subway starting receiving well |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011398953.XA CN112627776A (en) | 2020-12-01 | 2020-12-01 | Negative pressure well group dewatering construction method for shield subway starting receiving well |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DD106671A1 (en) * | 1973-09-05 | 1974-06-20 | ||
| CN101092818A (en) * | 2007-06-07 | 2007-12-26 | 上海交通大学 | Method for lowering water by combining phreatic water in footing groove with artesian aquifer - well stratifications |
| CN102278142A (en) * | 2011-05-04 | 2011-12-14 | 中铁隧道集团二处有限公司 | Vacuum lightweight well-point dewatering method |
| CN104060621A (en) * | 2013-09-03 | 2014-09-24 | 中国建筑第四工程局有限公司 | Construction method for super vacuum dewatering well and well tube structure used in construction method |
| CN104358267A (en) * | 2014-10-31 | 2015-02-18 | 上海岩土工程勘察设计研究院有限公司 | Vacuum tube well precipitation and disposal method for rapidly restoring in-situ water and soil in polluted place |
| CN104878771A (en) * | 2015-06-05 | 2015-09-02 | 北京地矿工程建设有限责任公司 | Construction method for vacuum tube well dewatering system |
-
2020
- 2020-12-01 CN CN202011398953.XA patent/CN112627776A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DD106671A1 (en) * | 1973-09-05 | 1974-06-20 | ||
| CN101092818A (en) * | 2007-06-07 | 2007-12-26 | 上海交通大学 | Method for lowering water by combining phreatic water in footing groove with artesian aquifer - well stratifications |
| CN102278142A (en) * | 2011-05-04 | 2011-12-14 | 中铁隧道集团二处有限公司 | Vacuum lightweight well-point dewatering method |
| CN104060621A (en) * | 2013-09-03 | 2014-09-24 | 中国建筑第四工程局有限公司 | Construction method for super vacuum dewatering well and well tube structure used in construction method |
| CN104358267A (en) * | 2014-10-31 | 2015-02-18 | 上海岩土工程勘察设计研究院有限公司 | Vacuum tube well precipitation and disposal method for rapidly restoring in-situ water and soil in polluted place |
| CN104878771A (en) * | 2015-06-05 | 2015-09-02 | 北京地矿工程建设有限责任公司 | Construction method for vacuum tube well dewatering system |
Non-Patent Citations (3)
| Title |
|---|
| 乐贵平: "《城市轨道交通工程施工安全风险技术控制要点》", 30 January 2019, 中国铁道出版社 * |
| 吉海军: "《建筑施工技术》", 30 July 2017, 北京：北京理工大学出版社 * |
| 陈幼雄: "《井点降水设计与施工》", 30 January 2004, 上海：上海科学普及出版社 * |
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Application publication date: 20210409 |
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