CN108166517B - Well sealing method and well sealing device for super high-rise high-water pressure deep well dewatering well - Google Patents
Well sealing method and well sealing device for super high-rise high-water pressure deep well dewatering well Download PDFInfo
- Publication number
- CN108166517B CN108166517B CN201810137930.XA CN201810137930A CN108166517B CN 108166517 B CN108166517 B CN 108166517B CN 201810137930 A CN201810137930 A CN 201810137930A CN 108166517 B CN108166517 B CN 108166517B
- Authority
- CN
- China
- Prior art keywords
- well
- water
- dewatering
- dewatering well
- sealing plate
- 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.)
- Active
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title abstract description 140
- 238000007789 sealing Methods 0.000 title abstract description 97
- 238000000034 method Methods 0.000 title abstract description 12
- 238000003466 welding Methods 0.000 abstract description 39
- 238000005086 pumping Methods 0.000 abstract description 28
- 239000004568 cement Substances 0.000 abstract description 18
- 238000004519 manufacturing process Methods 0.000 abstract description 8
- 238000005070 sampling Methods 0.000 abstract description 4
- 238000007711 solidification Methods 0.000 abstract description 4
- 230000008023 solidification Effects 0.000 abstract description 4
- 230000007613 environmental effect Effects 0.000 abstract description 3
- 238000004134 energy conservation Methods 0.000 abstract description 2
- 239000012466 permeate Substances 0.000 abstract 1
- 238000010276 construction Methods 0.000 description 12
- 235000019353 potassium silicate Nutrition 0.000 description 10
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 10
- 239000010410 layer Substances 0.000 description 6
- 239000004575 stone Substances 0.000 description 5
- 229910001335 Galvanized steel Inorganic materials 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 4
- 239000011248 coating agent Substances 0.000 description 4
- 239000011247 coating layer Substances 0.000 description 4
- 238000000576 coating method Methods 0.000 description 4
- 239000008397 galvanized steel Substances 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- 239000003292 glue Substances 0.000 description 4
- 230000000630 rising effect Effects 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229920002635 polyurethane Polymers 0.000 description 2
- 239000004814 polyurethane Substances 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 239000002912 waste gas Substances 0.000 description 2
- 238000004078 waterproofing Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- LNSPFAOULBTYBI-UHFFFAOYSA-N [O].C#C Chemical group [O].C#C LNSPFAOULBTYBI-UHFFFAOYSA-N 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 239000011083 cement mortar Substances 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
Classifications
-
- 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
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D15/00—Handling building or like materials for hydraulic engineering or foundations
- E02D15/02—Handling of bulk concrete specially for foundation or hydraulic engineering purposes
- E02D15/04—Placing concrete in mould-pipes, pile tubes, bore-holes or narrow shafts
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Hydrology & Water Resources (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
The invention discloses a well sealing method and a well sealing device for an ultra-high-rise high-water pressure deep well dewatering well, wherein the method comprises the following steps: manufacturing a water sealing plate according to the inner diameter of the dewatering well, and seamlessly welding a grouting pipe, a drain pipe and a sleeve on the water sealing plate; fully welding a water sealing plate in a dewatering well when the submersible pump performs water pumping operation; after the welding line is cooled, closing the submerged pump, rapidly plugging the grouting pipe, the drain pipe and the sleeve, and observing whether water seepage exists at the welding line; after the water does not permeate at the welding seam, opening a grouting pipe to perform high-pressure grouting into the dewatering well, and opening a drain pipe to drain water; after thick cement paste is discharged from the drain pipe, sampling the discharged thick cement paste to manufacture a test block, plugging the drain pipe, performing stable pressure grouting on the grouting pipe to a set value, and curing the test block under the same condition as the solidification of the thick cement paste in the dewatering well; and after the test block reaches the set strength, pouring concrete on the water sealing plate to seal the well. The invention has the advantages of high well sealing quality, good well sealing efficiency, low well sealing cost, environment friendliness, energy conservation and environmental protection.
Description
Technical Field
The invention relates to the technical field of well sealing of deep well dewatering wells, in particular to a well sealing method and a well sealing device for an ultra-high-rise high-water-pressure deep well dewatering well.
Background
With the development of urban construction, the depth of a building basement is continuously increased, the foundation pit is deeper and deeper, the requirement on foundation pit dewatering is higher and higher, the water level is lower than the requirement, and the foundation pit is easy to be dangerous. The dewatering well is a well for lowering the underground water level, and is one of the common measures for ensuring the smooth construction of the foundation pit because the well is filled with a water pump to pump the underground water after the well is filled with the water. However, for the ultra-high-rise high-water-pressure deep well dewatering well, the plugging difficulty is huge due to the phenomena of large diameter of the dewatering well mouth, high water level, high water surge speed and the like.
In order to solve the problems, the effective blocking is realized, and the conventional method is as follows: firstly, draining water in a dewatering well by using a submersible pump until a dewatering water level line reaches a set value; then, closing and discarding the submerged pump, rapidly injecting water glass cement into the dewatering well, gradually plugging by utilizing the rapid hardening property of the water glass cement, and reducing the water discharge caliber of the dewatering well to zero caliber; and finally, welding a water sealing cover plate at the wellhead of the dewatering well to finish the sealing.
Although the method can effectively solve the plugging problem of the ultra-high-rise high-water-pressure deep well dewatering well, the method has the following problems:
1. the water-proofing agent mainly depends on the water glass glue to act on quick-setting to stop the water under high pressure from flowing out, the setting speed is very fast, generally a few minutes, so the water-proofing agent must be prepared and used at the moment when being used on a construction site, and the high-efficiency site construction speed is required, so that the requirement on staff is high.
2. When the water glass cement is condensed, the water level in the dewatering well can still rise rapidly and high, the impact force on the water glass cement is huge, so that the water glass cement is split, isolated and splashed onto the body of a worker, and the potential safety hazard is large.
3. Under the impact of high-pressure water level, the condensation shape of water glass glue is the thin concave shape in thick center in both sides, when the top water seal apron welding is incomplete to have the gap, the high-pressure water in the precipitation well can't be in static, can progressively strike the weak point of water glass glue, and the light person infiltration, the heavy person dashes out and unseals water seal apron and gushes out water, because water glass glue and water seal apron have been placed precipitation well wellhead, can't add the shutoff once more in the top, belongs to primary construction operation basically, does not have the possibility of remedy, and shutoff durability is poor.
4. Compared with common cement mortar, the water glass cement has low environmental protection performance and higher price.
Disclosure of Invention
The invention aims to provide a well sealing method and a well sealing device for an ultra-high-rise high-water-pressure deep well dewatering well, which are low in cost, durable, environment-friendly, energy-saving and environment-friendly and convenient to construct.
The well sealing method for the super high-rise high-water pressure deep well dewatering well provided by the invention comprises the following steps:
(1) Manufacturing a water sealing plate according to the inner diameter of the dewatering well, and seamlessly welding a grouting pipe, a drain pipe and a sleeve on the water sealing plate;
(2) Sleeving a water sealing plate on a water pumping hose of the submersible pump through a sleeve, putting the submersible pump into a dewatering well for water pumping operation, and ensuring that the water pumping rate of the submersible pump is greater than the rising rate of the water level in the dewatering well;
(3) Fully welding the water sealing plate manufactured in the step (1) in a dewatering well while pumping the water by the submersible pump;
(4) After the welding line is cooled, closing the submerged pump, rapidly plugging the grouting pipe, the drain pipe and the sleeve, and observing whether water seepage exists at the welding line;
(5) If water seepage occurs, the sleeve is opened to start the submersible pump to continue pumping operation, repair welding treatment is carried out at the water seepage position, and the step (4) is repeated; if no water seepage occurs, the grouting pipe is opened to perform high-pressure grouting into the dewatering well, and the drain pipe is opened to drain water;
(6) After thick cement paste is discharged from the drain pipe, sampling the discharged thick cement paste to manufacture a test block, plugging the drain pipe, performing stable pressure grouting on the grouting pipe to a set value, and curing the test block under the same condition of solidification of the thick cement paste in the dewatering well;
(7) And pouring concrete on the water sealing plate to seal the well after the test block reaches the set strength.
In order to improve the overall durability of the dewatering well plugging and realize the purpose of zero leakage, at least two water stop plates are manufactured according to the inner diameter of the dewatering well, and after the well sealing operation in the step (7) is completed, the water stop plates are welded in the wellhead of the dewatering well at intervals up and down.
For convenience and practicality, a hook is arranged in the sleeve, and the pumping hose and the cable of the submersible pump are retrieved and placed on the hook for standby while the submersible pump is closed in the step (4).
In the step (7), the water sealing plate is subjected to full sealing treatment by adopting flexible waterproof paint, and then a micro-expansion impervious fine stone concrete well is poured to seal the well.
In the step (3), the water line in the dewatering well is required to be lowered to a position at least 450mm away from the wellhead, and then the water sealing plate manufactured in the step (1) is fully welded in the dewatering well at a position 260-330 mm away from the wellhead while the submersible pump is used for pumping water.
The invention also provides a well sealing device for implementing the well sealing method, which comprises a water sealing plate welded in the dewatering well in a seamless mode, wherein a grouting pipe, a sleeve pipe and a drain pipe are welded on the water sealing plate, control valves are arranged at the upper ends of the grouting pipe and the drain pipe, a water sealing cap is connected with the top of the sleeve pipe in a threaded mode, and a concrete layer is poured on the water sealing plate.
In order to improve the durability of the water sealing plate, a flexible waterproof coating layer is coated between the water sealing plate and a concrete layer, and the concrete layer adopts micro-expansion impervious fine stone concrete.
For convenience and practicality, a hook is arranged in the sleeve.
In order to ensure the water sealing effect, a plurality of triangular stiffening plates are uniformly welded between the water sealing plate and the inner wall of the dewatering well along the circumferential direction.
In order to ensure the water sealing effect, the tops of the grouting pipe and the drain pipe are both in threaded connection with a sealing cap.
Compared with the prior art, the invention has the following advantages:
1. the submerged pump with the pumping speed greater than the water level rising speed in the dewatering well is selected for pumping, and the water sealing plate is welded during pumping, so that the requirement of welding the water sealing plate in the well can be met, the water sealing plate can be plugged in a channel according to actual needs, and the applicability is stronger; but also can prevent construction objects from flying out of the dewatering well under the impact of high-pressure water, injure workers by smashing, and has better safety performance.
2. The water sealing plate is welded during water pumping, and concrete sealing well is poured on the water sealing plate in a conventional construction mode, so that specific manufacturing on a construction site is not needed, efficient site construction speed is not needed, the environment-friendly performance is high, the price is low, and the requirements on staff are low.
3. After the water sealing plate is welded, the grouting pipe, the sleeve and the drain pipe can be closed by the vertical horse, so that static water is presented in the well, the quality of a welding line is checked along with the increase of water pressure, the high-pressure grouting is performed again under the condition of no leakage, and the durability of the water sealing plate is ensured.
The invention has the advantages of simple structure, convenient operation, high well sealing quality, good well sealing efficiency, low well sealing cost, environment friendliness, energy conservation and environmental protection.
Drawings
FIG. 1 is a schematic diagram of the installation structure of the well sealing device for the ultra-high-rise high-water-pressure deep well dewatering well.
FIG. 2 is a schematic cross-sectional view of the structure at A-A in FIG. 1.
Fig. 3 is a schematic diagram of the structure of the invention after well sealing for a super high-rise high-water pressure deep well dewatering well.
The labels shown in the figures and the corresponding component names are:
1. dewatering well; 2. a water sealing plate; 3. grouting pipe; 4. a sleeve; 5. a drain pipe; 6. a control valve; 7. a water sealing cap; 8. a concrete layer; 9. a flexible waterproof coating layer; 10. a hook; 11. triangular stiffening plates; 12. a water stop plate; 13. plugging the cap; 14. a submersible pump water pumping hose; 15. and (5) a cable line.
Detailed Description
The well sealing method for the super high-rise high-water pressure deep well dewatering well comprises the following steps:
(1) Manufacturing a water sealing plate according to the inner diameter of the dewatering well, and arranging three through holes on the water sealing plate and correspondingly welding grouting pipes, drain pipes and sleeves with specified lengths in a seamless manner;
(2) Sleeving a water sealing plate on a water pumping hose of the submersible pump through a sleeve, putting the submersible pump into a dewatering well for water pumping operation, and ensuring that the water pumping rate of the submersible pump is greater than the rising rate of the water level in the dewatering well;
(3) When the water level line in the dewatering well is lowered to a position at least 450mm away from the wellhead, when the submersible pump is used for pumping water and reducing the water level, the electric hair drier is adopted to blow the steel sleeve at the welding position, and then the water sealing plate manufactured in the step (1) is welded at the position 260-330 mm away from the wellhead in the dewatering well in a seamless welding mode, wherein the bottom of the grouting pipe orifice is required to be about 500mm away from the bottom of the well, and the welding point is required to be generally positioned in a deep basement, so that the space is smaller, two blowers are required to be used for operation, one air supply is adopted to ensure fresh air supply at the welding position, one air exhaust is adopted to ensure that gas generated during welding is timely discharged, and the welding workers are prevented from sucking waste gas generated during welding;
(4) After the welding line is cooled, closing the submerged pump, rapidly plugging the grouting pipe, the drain pipe and the sleeve, and observing whether water seepage exists at the welding line;
(5) If water seepage occurs, the sleeve is opened to start the submersible pump to continue pumping operation, repair welding treatment is carried out at the water seepage position, and the step (4) is repeated; if no water seepage occurs, the grouting pipe is opened to perform high-pressure grouting into the dewatering well, and the drain pipe is opened to drain the dewatering well;
(6) After thick cement paste is discharged from the drainage pipe, sampling the discharged thick cement paste to manufacture a test block, plugging the drainage pipe, simultaneously, performing stable pressure grouting to a pressure value set by a grouting machine through a grouting pipe, plugging the grouting pipe, and curing the test block under the same condition as the solidification of the thick cement paste in the dewatering well;
(7) Opening the drain pipe again after the test block reaches the set strength, and plugging the drain pipe after no water leakage occurs; if water leakage exists, the grouting pipe is plugged by injecting polyurethane grouting material under high pressure, and then the drain pipe and the grouting pipe are plugged; and finally, pouring concrete on the water sealing plate to seal the well.
In order to prevent the water sealing plate serving as the first water sealing function from fine water seepage caused by long construction time and aging, improve the overall durability of the plugging of the dewatering well and realize the purpose of zero leakage of the dewatering well part, at least two water sealing plates can be manufactured according to the inner diameter of the dewatering well, and after the well sealing operation in the step (7) is finished, the water sealing plates are welded in the wellhead of the dewatering well in a seamless welding mode at intervals up and down.
In order to facilitate the pumping action of the same submersible pump when the welding seam is permeated, the cost is reduced, the hanger is arranged in the sleeve, and the pumping hose and the cable of the submersible pump can be retrieved and placed on the hanger for standby while the submersible pump is closed in the step (4).
In the invention, after grouting is completed, the flexible waterproof coating can be painted on the water sealing plate to carry out full-sealing treatment, and then the concrete of the micro-expansion impervious fine stone is poured on the flexible waterproof coating to realize well sealing, so that the durability of the water sealing plate is improved.
As can be seen from fig. 1 to 3, the invention further provides a well sealing device for a deep well dewatering well with super high water pressure, which comprises a water sealing plate 2, a grouting pipe 3, a sleeve 4 and a drain pipe 5, wherein the water sealing plate 2 is welded on the inner wall of the dewatering well 1 in a seamless manner, three through holes corresponding to the grouting pipe 3, the sleeve 4 and the drain pipe 5 are formed in the water sealing plate 2, the grouting pipe 3 penetrates through the corresponding through holes and is welded with the water sealing plate 2 in a seamless manner, the sleeve 4 and the drain pipe 5 are welded above the water sealing plate 2 in a seamless manner and are in butt joint with the corresponding through holes, a control valve 6 is arranged at the upper ends of the grouting pipe 3 and the drain pipe 5, a water sealing cap 7 is connected at the top of the sleeve 4 in a threaded manner, a flexible waterproof coating 9 is coated above the water sealing plate 2, and a concrete layer 8 of micro-expansion fine stone is filled in the flexible waterproof coating.
As can be seen from fig. 1 to 3, a hook 10 for hanging a submersible pump pumping hose 14 and a cable 15 on a submersible pump is arranged in the sleeve 4 of the invention, a plurality of triangular stiffening plates 11 are uniformly welded between the water sealing plate 2 and the inner wall of the dewatering well 1 along the circumferential direction of the dewatering well 1, at least two water stopping plates 12 are seamlessly welded in the dewatering well 1 above the concrete 8, and the tops of the grouting pipe 3 and the drain pipe 5 are both in threaded connection with a sealing cap 13.
In the invention, the water sealing plate 2 and the water stopping plate 12 are made of 6mm thick steel plates, the grouting pipe 3 is made of DN25 galvanized steel pipes with 3mm wall thickness, the sleeve 4 is made of DN150 galvanized steel pipes with 3mm wall thickness, the drain pipe 5 is made of DN15 galvanized steel pipes with 3mm wall thickness, the control valve 6 is provided with two copper ball valves with DN25 and DN15 respectively, the lift of the submersible pump is not less than 50 meters, and the triangular stiffening plate 11 is made of 10mm thick steel plates.
In the invention, the well sealing process of the super high-rise high-water pressure deep well dewatering well by using the well sealing device is as follows:
1. and (3) preparation of construction:
a. material and equipment preparation:
one electric welder; an oxygen acetylene gas cutting machine and an exhaust fan;
b. personnel preparation:
one professional electrician, one electric welder, one auxiliary welder, one construction manager and one safety person;
2. cutting the inner diameter of the dewatering well 1 in a field real-quantity size, forming a water sealing plate 2 according to the size, forming through holes on the water sealing plate 2 according to layout positions, and performing anti-corrosion and rust-proof treatment on the water sealing plate; DN25, 150, 15 galvanized steel pipes with the wall thickness of 3mm are welded at the corresponding positions of the water sealing plate 2 according to the required length to form a grouting pipe 3, a sleeve 4 and a drain pipe 5, a control valve 6 is arranged on the grouting pipe 3 and the drain pipe 5, a hook 10 is welded in the sleeve 4, and all welding seams are welded under the protection of carbon dioxide gas by a professional welder to ensure full welding seams;
3. the water sealing plate 2 is sleeved on the water pumping hose 14 of the submersible pump through the sleeve 4, the submersible pump is placed into the dewatering well 1 to perform water pumping operation, and the water pumping speed of the submersible pump is ensured to be larger than the rising speed of the water level in the dewatering well;
4. when the water level line in the dewatering well descends to a position at least 450mm away from the wellhead, when the submersible pump pumps water, the electric hair drier is adopted to blow the steel sleeve at the welding position, and then the water sealing plate 2 manufactured in the step 2 is welded at the position 260-330 mm away from the wellhead in the dewatering well 1 in a seamless welding mode, wherein the bottom of the grouting pipe 3 is required to be 500mm away from the bottom of the well, and the welding point is generally positioned in a deep basement, so that the space is smaller, two air blowers are required to be adopted for operation, one air supply is adopted to ensure fresh air supply at the welding position, and one air exhaust is adopted to ensure that gas generated during welding is timely discharged, and the welding worker is prevented from sucking waste gas generated during welding;
5. after the welding line is cooled, closing the submerged pump, retrieving a pumping hose 14 and a cable 15 of the submerged pump, placing the pumping hose and the cable 15 on the hook 10 for standby, rapidly closing the two control valves 6 and screwing the water sealing cap 7 on the sleeve 4 so as to seal the grouting pipe 3, the drain pipe 5 and the sleeve 4, and observing whether water seepage exists at the welding line;
6. if water seepage occurs, the water sealing cap 7 is taken down to open the sleeve 4, the pumping hose 14 and the cable 15 in the sleeve 4 are taken out, the submersible pump is started to continue pumping operation, repair welding treatment is carried out at the water seepage position, and the step 5 is repeated; if no water seepage exists, firstly performing anti-corrosion and anti-rust treatment on the sleeve 4 and the water sealing cap 7, connecting a DN25 galvanized drain pipe with a 3mm wall thickness and a direct joint on the drain pipe 5 in a threaded manner, then opening a control valve 6 on the grouting pipe 3 to perform high-pressure grouting into the dewatering well 1, and opening the control valve 6 on the drain pipe 5 to drain the dewatering well 1;
7. after thick cement paste is discharged into the drain pipe 5, sampling the discharged thick cement paste to manufacture a test block, closing a control valve 6 on the drain pipe 5 to seal the drain pipe 5, simultaneously stabilizing pressure and grouting to a pressure value set by a grouting machine through the grouting pipe 3, closing the control valve 6 on the grouting pipe 3 to seal the grouting pipe 3, and curing the test block under the same condition of solidification of the thick cement paste in the dewatering well;
8. after the test block reaches the set strength, opening the control valve 6 on the drain pipe 5 again, and closing the control valve to seal the drain pipe 5 after no water leakage occurs; if water leakage exists, the grouting pipe 3 is subjected to high-pressure injection of polyurethane grouting material to perform plugging treatment, and then two control valves 6 are closed to plug the drain pipe 5 and the grouting pipe 3; finally, a blocking cap 13 is covered on the grouting pipe 3 and the drain pipe 5, a flexible waterproof coating layer 9 is painted on the water sealing plate 2 for full sealing treatment, and then a concrete layer 8 of micro-expansion impervious fine stone is poured on the flexible waterproof coating layer 9 for well sealing;
9. and 2 complete water stop plates 12 are welded at intervals of up and down at a position 100mm and 50mm away from the wellhead of the dewatering well 1.
Claims (10)
1. The well sealing method for the ultra-high-rise high-water-pressure deep well dewatering well is characterized by comprising the following steps of:
(1) Manufacturing a water sealing plate according to the inner diameter of the dewatering well, and seamlessly welding a grouting pipe, a drain pipe and a sleeve on the water sealing plate;
(2) Sleeving a water sealing plate on a water pumping hose of the submersible pump through a sleeve, putting the submersible pump into a dewatering well for water pumping operation, and ensuring that the water pumping rate of the submersible pump is greater than the rising rate of the water level in the dewatering well;
(3) Fully welding the water sealing plate manufactured in the step (1) in a dewatering well while pumping the water by the submersible pump;
(4) After the welding line is cooled, closing the submerged pump, rapidly plugging the grouting pipe, the drain pipe and the sleeve, and observing whether water seepage exists at the welding line;
(5) If water seepage occurs, the sleeve is opened to start the submersible pump to continue pumping operation, repair welding treatment is carried out at the water seepage position, and the step (4) is repeated; if no water seepage occurs, the grouting pipe is opened to perform high-pressure grouting into the dewatering well, and the drain pipe is opened to drain water;
(6) After thick cement paste is discharged from the drain pipe, sampling the discharged thick cement paste to manufacture a test block, plugging the drain pipe, performing stable pressure grouting on the grouting pipe to a set value, and curing the test block under the same condition of solidification of the thick cement paste in the dewatering well;
(7) And pouring concrete on the water sealing plate to seal the well after the test block reaches the set strength.
2. The well sealing method for the ultra-high-rise high-water-pressure deep well dewatering well as claimed in claim 1, wherein: and (3) manufacturing at least two water stop plates according to the inner diameter of the dewatering well, and fully welding the water stop plates in the wellhead of the dewatering well at intervals up and down after the well sealing operation in the step (7) is completed.
3. The well sealing method for the ultra-high-rise high-water-pressure deep well dewatering well as claimed in claim 1, wherein: and (3) arranging a hook in the sleeve, closing the submersible pump in the step (4), and simultaneously retrieving a pumping hose and a cable of the submersible pump and placing the pumping hose and the cable on the hook for standby.
4. The well sealing method for the ultra-high-rise high-water-pressure deep well dewatering well as claimed in claim 1, wherein: in the step (7), the water sealing plate is subjected to full sealing treatment by adopting flexible waterproof paint, and then the micro-expansion impervious fine stone concrete well is poured to seal.
5. The well sealing method for the ultra-high-rise high-water-pressure deep well dewatering well as claimed in claim 1, wherein: in the step (3), the water line in the dewatering well is required to be lowered to a position at least 450mm away from the wellhead, and then the water sealing plate manufactured in the step (1) is fully welded in the dewatering well at a position 260-330 mm away from the wellhead while the submersible pump is used for pumping water.
6. A well sealing apparatus for performing the well sealing method of claim 1, wherein: including seamless welding in dewatering well (1) seal water board (2), the welding has slip casting pipe (3), sleeve pipe (4) and drain pipe (5) on this seal water board slip casting pipe and drain pipe's upper end all installs control valve (6) sleeve pipe top threaded connection has seal water block (7) pour concrete layer (8) on the seal water board.
7. The well sealing apparatus of claim 6, wherein: a flexible waterproof coating layer (9) is coated between the water sealing plate and a concrete layer, and the concrete layer adopts micro-expansion impervious fine stone concrete.
8. The well sealing apparatus of claim 6, wherein: a hook (10) is arranged in the sleeve.
9. The well sealing apparatus of claim 6, wherein: a plurality of triangular stiffening plates (11) are uniformly welded between the water sealing plate and the inner wall of the dewatering well along the circumferential direction.
10. The well sealing apparatus of claim 6, wherein: the tops of the grouting pipe and the drain pipe are both in threaded connection with a plugging cap (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810137930.XA CN108166517B (en) | 2018-02-10 | 2018-02-10 | Well sealing method and well sealing device for super high-rise high-water pressure deep well dewatering well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810137930.XA CN108166517B (en) | 2018-02-10 | 2018-02-10 | Well sealing method and well sealing device for super high-rise high-water pressure deep well dewatering well |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108166517A CN108166517A (en) | 2018-06-15 |
| CN108166517B true CN108166517B (en) | 2023-10-27 |
Family
ID=62513723
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810137930.XA Active CN108166517B (en) | 2018-02-10 | 2018-02-10 | Well sealing method and well sealing device for super high-rise high-water pressure deep well dewatering well |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108166517B (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109025899B (en) * | 2018-08-14 | 2021-03-02 | 北京天润建设有限公司 | Well sealing device |
| CN110043249B (en) * | 2019-05-06 | 2024-09-24 | 铜陵有色金属集团铜冠矿山建设股份有限公司 | Shaft underwater construction water sealing layer monitoring device |
| CN110144918A (en) * | 2019-05-22 | 2019-08-20 | 四川童燊防水工程有限公司 | Construction method of anti-seepage and plugging of underground building dewatering well |
| CN113174981B (en) * | 2021-04-23 | 2022-01-11 | 江苏固洲基础工程有限公司 | Plugging device of high water pressure deep well precipitation well |
| CN113356249A (en) * | 2021-05-18 | 2021-09-07 | 中铁十六局集团第一工程有限公司 | Dewatering well sealing device and dewatering well sealing method |
| CN113482026A (en) * | 2021-07-18 | 2021-10-08 | 中天建设集团有限公司 | Plugging method and device for pressure-bearing dewatering well |
| CN116024998A (en) * | 2023-03-16 | 2023-04-28 | 北京城建建设工程有限公司 | Construction method for water-sealing blocking of deep foundation pit dewatering well |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000314136A (en) * | 1999-05-06 | 2000-11-14 | Shimizu Corp | Water blocking wall well and groundwater treatment mechanism |
| JP2007100401A (en) * | 2005-10-05 | 2007-04-19 | Izumi Pump Seisakusho:Kk | Undergroundwater level lowering apparatus |
| CN102797266A (en) * | 2012-08-31 | 2012-11-28 | 天津住宅集团建设工程总承包有限公司 | Well sealing waterproof construction method for dewatering well |
| CN103485352A (en) * | 2013-09-30 | 2014-01-01 | 上海建工七建集团有限公司 | Construction method for blocking depressurization well by adopting accelerated cement |
| CN105178342A (en) * | 2015-08-10 | 2015-12-23 | 中建八局第三建设有限公司 | Precipitation well casing and method for blocking reserved hole of foundation pit through precipitation well casing |
| CN206346209U (en) * | 2016-12-09 | 2017-07-21 | 中国一冶集团有限公司 | A kind of quick solution dewatering well piping plugging structure |
| CN107620312A (en) * | 2017-08-27 | 2018-01-23 | 中铁十二局集团有限公司 | High hydraulic pressure precipitation well construction and hydrostatic slip casting method for blocking in a kind of Metro station excavation |
-
2018
- 2018-02-10 CN CN201810137930.XA patent/CN108166517B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000314136A (en) * | 1999-05-06 | 2000-11-14 | Shimizu Corp | Water blocking wall well and groundwater treatment mechanism |
| JP2007100401A (en) * | 2005-10-05 | 2007-04-19 | Izumi Pump Seisakusho:Kk | Undergroundwater level lowering apparatus |
| CN102797266A (en) * | 2012-08-31 | 2012-11-28 | 天津住宅集团建设工程总承包有限公司 | Well sealing waterproof construction method for dewatering well |
| CN103485352A (en) * | 2013-09-30 | 2014-01-01 | 上海建工七建集团有限公司 | Construction method for blocking depressurization well by adopting accelerated cement |
| CN105178342A (en) * | 2015-08-10 | 2015-12-23 | 中建八局第三建设有限公司 | Precipitation well casing and method for blocking reserved hole of foundation pit through precipitation well casing |
| CN206346209U (en) * | 2016-12-09 | 2017-07-21 | 中国一冶集团有限公司 | A kind of quick solution dewatering well piping plugging structure |
| CN107620312A (en) * | 2017-08-27 | 2018-01-23 | 中铁十二局集团有限公司 | High hydraulic pressure precipitation well construction and hydrostatic slip casting method for blocking in a kind of Metro station excavation |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108166517A (en) | 2018-06-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108166517B (en) | Well sealing method and well sealing device for super high-rise high-water pressure deep well dewatering well | |
| CN107620312A (en) | High hydraulic pressure precipitation well construction and hydrostatic slip casting method for blocking in a kind of Metro station excavation | |
| CN106544961A (en) | A kind of distress in concrete blocking method | |
| CN108252530A (en) | A kind of parapet percolating water repairs technique | |
| CN104088254A (en) | Leakage repairing device for pressure-bearing reinforced concrete structure and construction method thereof | |
| CN105756059A (en) | Back anchor type anti-floating anchor and construction method | |
| CN103498486A (en) | Method for blocking post-cast strip downcast pipe well through sleeve pipe | |
| CN105464194A (en) | Water proofing and leak repairing construction method for sewage pipe network below underground water level | |
| CN102002950B (en) | Liquid division slip casting reinforcing method for subsurface structure construction joints | |
| CN204300520U (en) | A kind of cable penetration sleeve structure | |
| CN203977368U (en) | Pressure-bearing reinforced concrete structure leakage repair device | |
| CN206599776U (en) | Junction block for buried waterproof steel plate in diaphram wall | |
| CN207959289U (en) | Structure is repaired in a kind of leak for basement post-pouring zone position | |
| CN208168362U (en) | Protection pier structure for cast concrete exhaust pipe | |
| CN109138116A (en) | Concrete expires packet drainage pipeline tubine construction method | |
| CN113062313A (en) | Prefabricated pile tip suitable for high water level area and construction method thereof | |
| CN106812132A (en) | For the junction block and its construction method of buried waterproof steel plate in diaphram wall | |
| CN209040133U (en) | Well-covering device for dewatering well suitable for rich groundwater region | |
| CN116538348B (en) | Water diversion engineering jacking pipe internally-penetrating steel pipe and self-compacting concrete pouring construction method | |
| CN107514150A (en) | A kind of construction technology of utilization space displacement method reconstruction Durable Water Repellant | |
| CN203514332U (en) | Casing for blocking dewatering tube well of post-cast strip | |
| CN207904943U (en) | Well-sealing device for superelevation floor height hydraulic pressure dewatering well of deep well | |
| CN205242454U (en) | Underground concrete structure expansion joint administration structure | |
| CN211849528U (en) | Confined water precipitation well shut-in device | |
| CN213539105U (en) | A leaking stoppage structure for deep basal pit basement outer wall crack |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |