CN114032936A - Two-stage plugging construction method for large-water-yield dewatering well - Google Patents
Two-stage plugging construction method for large-water-yield dewatering well Download PDFInfo
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- CN114032936A CN114032936A CN202111282221.9A CN202111282221A CN114032936A CN 114032936 A CN114032936 A CN 114032936A CN 202111282221 A CN202111282221 A CN 202111282221A CN 114032936 A CN114032936 A CN 114032936A
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- 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
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/045—Underground structures, e.g. tunnels or galleries, built in the open air or by methods involving disturbance of the ground surface all along the location line; Methods of making them
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
- E02D31/02—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against ground humidity or ground water
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
- E02D31/02—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against ground humidity or ground water
- E02D31/025—Draining membranes, sheets or fabric specially adapted therefor, e.g. with dimples
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
- E02D31/10—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against soil pressure or hydraulic pressure
- E02D31/12—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against soil pressure or hydraulic pressure against upward hydraulic pressure
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2300/00—Materials
- E02D2300/0004—Synthetics
- E02D2300/0018—Cement used as binder
- E02D2300/002—Concrete
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Abstract
The invention discloses a two-stage plugging construction method for a precipitation well with large water yield, and belongs to the field of construction methods. The construction method provided by the invention can be applied to dewatering wells with large water yield, and the plugging effect is obviously improved. After the first-stage plugging is completed, floating pressure possibly existing on the bottom plate is released by retaining the control valve, and if the floating risk of the basement is high in the later stage, the ball valve can be opened to reduce the water pressure borne by the bottom plate, so that a relief well is prevented from being additionally drilled on the bottom plate in the later stage. And if the basement does not have the floating risk, filling concrete and completing well sealing.
Description
Technical Field
The invention belongs to the field of construction methods, and particularly relates to a two-stage plugging construction method for a precipitation well with large water yield.
Background
The plugging construction technology of dewatering wells is a key link in basement foundation construction, and directly influences the construction quality of basement foundations. The underground water level rises in the annual flood season, and the water yield of the dewatering well reserved on the basement bottom plate is usually large. If need seal the well this moment, the shutoff degree of difficulty is great on the one hand, and the water pressure that the bottom plate bore behind the well-shut increases on the other hand, and the risk of basement come-up increases. For example, the invention patent with the application number of CN201610377009.3 discloses a construction treatment method for plugging and stopping water by a foundation pit dewatering well penetrating through a basement concrete bottom plate, which comprises the following steps: manufacturing a water-stop steel sleeve → pouring the concrete of the floor mat layer of the basement → cutting the drainage well water filter pipe of the mat layer, winding asphalt hemp at the lower end of the water-stop steel sleeve, inserting the drainage well water filter pipe into the water-stop steel sleeve, sealing the water-stop steel sleeve by using cement mortar, constructing the waterproof layer of the floor mat layer of the basement → binding the steel bar of the concrete floor, continuously reducing water → pouring the concrete of the floor mat of the basement, continuously reducing water → finishing reducing water for the drainage well one by one → sealing the drainage well. Although the technical scheme can solve the problem of water stopping and plugging of the precipitation well penetrating through the basement concrete bottom plate when precipitation is finished, when the groundwater yield is overlarge, a large amount of water flow continuously overflows, so that the plugging difficulty is high, and the plugging quality cannot be ensured; even if plugging is finished, the bottom plate of the basement bears a large amount of buoyancy caused by water launching in the subsequent construction process, so that the basement floats upwards easily.
Therefore, how to reasonably seal the well and control the floating risk of the basement is an urgent problem to be solved.
Disclosure of Invention
The invention aims to solve the problems that a basement dewatering well with large water yield is difficult to block and floating is easy to occur after blocking in the prior art, and provides a two-stage blocking construction method for the dewatering well with large water yield.
The invention adopts the following specific technical scheme:
a two-stage plugging construction method for a precipitation well with large water yield comprises the following steps:
s1, installing a pre-buried sleeve and a water stop ring on the dewatering well of the basement bottom plate, wherein the bottom of the pre-buried sleeve and the connecting position of the dewatering well are sealed and watertight, the top of the pre-buried sleeve extends to the elevation range of the basement bottom plate, and the water stop ring is fixed on the periphery of the top of the pre-buried sleeve in a surrounding manner;
s2, binding the reinforcing steel bars of the basement bottom plate, and fixing the embedded sleeves and the water stop rings in reinforcing steel bar meshes according to respective positioning positions; then, concrete pouring is carried out on the basement bottom plate until the elevation is reached, and a reserved plugging port communicated with the upper side of the basement bottom plate is reserved at the top of the embedded sleeve in the pouring process;
s3, filling filter materials into the dewatering well through the reserved plugging port, and filtering water flow gushed from the well;
s4, after the inner wall of the embedded sleeve is cleaned, the built-in plugging plates with the sealing rings sleeved on the peripheries are pressed into the embedded sleeve one by one, and each built-in plugging plate is located on one cross section of the embedded sleeve and is attached to the inner wall of the embedded sleeve through the sealing rings on the peripheries; observing the flow of the water gushing out of the sleeve to be embedded after the built-in plugging plate is pressed in each time, and stopping pressing in a new built-in plugging plate when the flow of the water gushing out is smaller than the preset flow;
s5, installing a top plugging plate connected with a water outlet pipe at the top of the embedded sleeve, sucking water flow gushing out of the embedded sleeve through the water outlet pipe by using water pumping equipment to ensure that the gushing water in the embedded sleeve cannot overflow from the top, fully welding and fixing the top plugging plate and the embedded sleeve to completely seal the top of the embedded sleeve, then removing the water pumping equipment and installing a control valve for controlling the opening and closing of a water outlet on the water outlet pipe to finish plugging construction in the first stage;
s6, after the plugging construction in the first stage is completed, the control valve is kept closed, the floating risk of the basement is monitored, and if the floating risk caused by the underground water pressure occurs, the control valve is opened to release the water pressure borne by the basement bottom plate;
and S7, after the basement is determined not to float upwards, filling the reserved plugging opening with concrete to form continuous sealing of the whole basement bottom plate, and completing the second stage of plugging construction.
Preferably, the inner diameter of the embedded sleeve is equal to the outer diameter of the dewatering well; the water stop ring is a circular ring-shaped plate, and the inner diameter of the water stop ring is equal to the outer diameter of the embedded sleeve.
Preferably, the pre-buried sleeve, the water stop ring, the built-in plugging plate and the top plugging plate are all made of steel.
Preferably, the inner wall of the reserved plugging opening is subjected to roughening treatment in advance before filling concrete.
Preferably, the bottom surfaces of the built-in plugging plate and the top plugging plate are coated with antirust paint.
Preferably, the seal ring is a rubber seal ring.
Preferably, before the built-in plugging plate is installed, sundries on the inner wall of the embedded sleeve need to be cleaned, and the inner wall is guaranteed to be smooth and flat.
Preferably, after the fixing of the embedded sleeves is finished and before the reinforcing mesh of the basement bottom plate is bound, a cushion layer of the bottom plate is paved in advance.
Preferably, the filter material is graded sandstone or low-grade concrete, and the filter material in the precipitation well is filled until the water quality of the water is clear.
Preferably, the preset flow rate is the maximum suction flow rate of a single water pumping device.
Preferably, the water pumping device is a self-sucking pump, and the self-sucking pump is inserted into the water outlet pipe through a water pipe to pump water.
Compared with the prior art, the invention has the following beneficial effects:
the invention provides a two-stage plugging construction method for a precipitation well with large water yield, which can be applied to precipitation wells with large water yield, and the plugging effect is obviously improved. After the first-stage plugging is completed, floating pressure possibly existing on the bottom plate is released by retaining the control valve, and if the floating risk of the basement is high in the later stage, the ball valve can be opened to reduce the water pressure borne by the bottom plate, so that a relief well is prevented from being additionally drilled on the bottom plate in the later stage.
Drawings
FIG. 1 is a schematic view of a first state of the two-stage plugging construction method of the present invention;
FIG. 2 is a schematic view of a second state of the two-stage plugging method of the present invention;
FIG. 3 is a schematic view of a third state of the two-stage plugging method according to the present invention;
FIG. 4 is a diagram illustrating a fourth state of the two-stage plugging method according to the present invention;
FIG. 5 is a schematic diagram of a fifth state of the two-stage plugging method according to the present invention;
the reference numbers in the figures are: the device comprises a sleeve 1, a built-in plugging plate 2, a sealing ring 3, a top plugging plate 4, a water outlet pipe 5, a control valve 6, a water stop ring 7, a dewatering well 8, a filter material 9, a cushion layer 10, a bottom plate 11, a reserved plugging opening 12 and a side wall A.
Detailed Description
The invention will be further elucidated and described with reference to the drawings and the detailed description. The technical features of the embodiments of the present invention can be combined correspondingly without mutual conflict.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. The technical characteristics in the embodiments of the present invention can be combined correspondingly without mutual conflict.
In a preferred embodiment of the invention, the invention provides a two-stage plugging construction method for a precipitation well with large water yield, which comprises the following steps:
the first step is as follows: after the construction of the dewatering well of the basement bottom plate 11 is finished, before the construction of the subsequent basement bottom plate and other auxiliary structures, the pre-buried sleeve 1 and the water stop ring 7 need to be installed on the dewatering well of the basement bottom plate 11. The embedded sleeve 1 is used for guiding groundwater gushed from the dewatering well, and subsequent plugging construction is facilitated. In this embodiment, the embedded sleeve 1 is a cylindrical steel sleeve, the inner diameter of the embedded sleeve 1 is equal to the outer diameter of the precipitation well 8, the bottom of the steel sleeve needs to be tightly sleeved and fixed on the outer side of the top of the precipitation well, so that the connection position of the embedded sleeve 1 and the precipitation well keeps sealed and watertight, and the top of the embedded sleeve 1 extends to the elevation range of the basement bottom plate 11. In this embodiment, the height of the embedded sleeve 1 is 600mm, and the top of the embedded sleeve is slightly lower than the top elevation of the basement bottom plate 11. This seal ring 7 is the ring shape steel sheet, and its internal diameter equals pre-buried sleeve 1 external diameter, and seal ring 7 encircles the top periphery that is fixed in pre-buried sleeve 1, and the position that seal ring 7 and pre-buried sleeve 1 are connected is sealed fixed, and seal ring 7's effect forms the separation effect to groundwater with pre-buried sleeve 1 cooperation.
After the construction is completed in this construction step, the state shown in fig. 1 is formed. When a plurality of dewatering wells are present, the installation work needs to be performed separately.
The second step is that: and (3) binding the reinforcing steel bars of the basement bottom plate 11, fixing the embedded sleeve 1 and the water stop ring 7 in the reinforcing steel bar net according to respective positioning positions, wherein the specific construction mode of the reinforcing steel bar net can be selected according to design requirements. The embedded sleeve 1 can be bound into a whole by adopting steel wires and reinforcing meshes, so that the embedded sleeve is prevented from inclining in the concrete pouring process. And after the reinforcing mesh is constructed, pouring concrete on the basement bottom plate 11 until the concrete reaches the elevation of the basement bottom plate 11. However, it should be noted that a reserved plugging opening 12 communicating with the upper part of the basement bottom plate 11 needs to be reserved at the top of the embedded sleeve 1 in the pouring process.
The reserved plugging opening 12 can be realized by building a supporting template in advance. In this embodiment, the reserved plugging port 12 is a circular channel coaxial with the embedded sleeve 1, and the diameter of the cross section of the reserved plugging port should be larger than the embedded sleeve 1 but smaller than the water stop ring 7.
In addition, the concrete pouring method of the basement bottom plate 11 can be determined according to the design construction scheme of the basement, and corresponding functional layers can be arranged above and below the basement bottom plate 11 according to needs. In this embodiment, after the fixing of the embedded sleeve 1 is completed and before the reinforcing mesh of the basement bottom plate 11 is bound, a bottom plate cushion layer 10 needs to be laid in advance to improve the waterproof performance under the basement bottom plate 11 and improve the flatness of concrete pouring.
After the construction is completed in this construction step, the state shown in fig. 2 is formed.
The third step: because the used water of the basement contains a large amount of silt impurities, in order to facilitate subsequent construction, a filter material 9 needs to be filled into the precipitation well 8 through the reserved plugging port 12, and water flow gushed from the well is filtered. The material of the filter material 9 is not limited, and the filter material can play a role in filtering the gushed water. In this embodiment, the material may be graded sand or low grade concrete, the filling amount of the filter material 9 is determined according to the water quality of the gushing water, and the filter material can be stopped being filled until the water to be gushed is relatively clear and has no turbid sediment.
After the construction is completed in this construction step, the state shown in fig. 3 is formed.
The fourth step: before pressing in built-in shutoff board 2, in order to guarantee built-in shutoff board 2's shutoff effect, need be in advance to the inner wall clearance of embedded sleeve 1: the electric pick, the file and the like can be adopted to clean the sundries on the inner wall of the steel sleeve, so as to ensure that the inner wall of the steel sleeve is smooth and smooth. After the inner wall of the embedded sleeve 1 is cleaned, the built-in plugging plates 2 with the sealing rings 3 sleeved on the peripheries are pressed into the embedded sleeve 1 one by one, and the steel plate level is kept when the built-in plugging plates are pressed down. It should be noted that each built-in plugging plate 2 is located on a cross section of the embedded sleeve 1 and is attached to the inner wall of the embedded sleeve 1 through the peripheral sealing ring 3. Because the water inflow amount in the embedded sleeve 1 is large, the single built-in plugging plate 2 cannot achieve a full-percentage plugging effect, the water inflow phenomenon still exists, and the final plugging quality of the top of the embedded sleeve 1 is poor when the water inflow amount is too large. Therefore, the flow of water rushing out of the embedded sleeve 1 needs to be observed after the built-in plugging plate 2 is pressed in at each time, when the flow of the water rushing out is smaller than the preset flow, the pressing in of the new built-in plugging plate 2 is stopped, and the top plugging plate 4 is ready to be used for completely plugging the embedded sleeve 1.
Here, the so-called preset flow rate should be a small flow rate value. Generally, during actual construction, a pumping device is used to pump the gushing water in the embedded sleeve 1 in one time, so as to perform the final plugging operation. Therefore, in this embodiment, predetermine the maximum suction flow that the flow is single pumping equipment, after built-in closure plate 2 makes the flow of surging out water in pre-buried sleeve 1 satisfy this condition when impressing, can suck it with single pumping equipment, avoid pre-buried sleeve 1 to appear surging out the water overflow. In actual operation, the water yield around the steel plate can be observed after the first plugging plate 2 is pressed down, and whether the steel plate is increased or not is judged according to the water yield. If the water yield is small (one pumping device can be used for pumping out), the top steel plate can be welded. Otherwise, pressing down the steel plate for plugging again until the condition of welding the top steel plate is met;
after the construction is completed in this construction step, the state shown in fig. 4 is formed.
In the embodiment, the built-in plugging plate 2 and the top plugging plate 4 for plugging can be manufactured in advance by using 8mm thick steel plates in a factory. The diameter of the built-in plugging plate 2 is equal to the inner diameter of the embedded steel sleeve which is 10mm below the inner diameter of the embedded steel sleeve, and then the rubber sealing ring is fixed on the periphery of the steel plate. Meanwhile, in order to avoid rusting, the bottom surfaces of the built-in plugging plates 2 and the top plugging plate 4 can be brushed with anti-rust paint after the steel plates are manufactured. In addition, when the top plugging plate 4 is processed, a hole can be formed in the center in advance, and a straight pipe with a threaded opening can be welded to serve as the water outlet pipe 5.
The fifth step: install the top closure plate 4 that will be connected with outlet pipe 5 in pre-buried sleeve 1's top to utilize pumping equipment to suck the rivers of gushing out in pre-buried sleeve 1 through outlet pipe 5, guarantee that the water of gushing out in pre-buried sleeve 1 can not follow the top overflow. The equipment of drawing water can adopt arbitrary suction pump, adopts the self priming pump in this embodiment, and the self priming pump is connected earlier and is absorbed water the pipe, will absorb water again and manage and insert and draw water in outlet pipe 5 to guarantee the quality at welding top shutoff board 4. Treat that self priming pump normal during operation, the water of gushing out in the embedded sleeve 1 is constantly taken out futilely, can begin to carry out full weld with embedded sleeve 1 to top closure plate 4 and fix, makes embedded sleeve 1 top sealed completely. The welding quality is mainly controlled in the welding process, the water suction pipe is detached after welding is completed, the control valve 6 is installed to seal the water outlet, the control valve 6 can adopt any valve, and only the water outlet of the water outlet pipe 5 can be controlled to be opened and closed, and the control valve 6 can adopt a ball valve in the embodiment. And after the control valve 6 is installed, the plugging construction of the first stage is finished.
After the construction is completed in this construction step, the state shown in fig. 5 is formed.
And a sixth step: after the plugging construction in the first stage is completed, the construction of other basement structures can be continued according to the construction organization scheme of the basement. In the subsequent construction process, the control valve 6 is kept in a closed state, the floating risk of the basement is monitored, the vertical displacement of the bottom plate can be monitored, whether the bottom plate floats upwards or not is observed, the patrol frequency is increased, and the cracking conditions of the bottom plate, the floor slab, the beam, the wall and the column of the basement are focused. If the floating risk caused by the underground water pressure occurs, for example, the underground water level obviously rises in a short time to cause the floating of the basement and the structural cracking, the control valve 6 needs to be opened to release the water pressure born by the basement bottom plate 11, thereby ensuring the safety of the basement.
The seventh step: and after the basement is determined not to float upwards, filling the reserved plugging port 12 with concrete to form continuous sealing of the whole basement bottom plate 11, and completing the second stage of plugging construction.
In addition, in order to ensure that the concrete to be filled later can be sufficiently fixed and combined with other concrete which is poured and formed in advance, the inner wall of the reserved plugging opening 12 is preferably roughened on the side wall a before the concrete is filled.
Therefore, according to the two-stage plugging construction method for the large-water-yield dewatering well, the steel sleeve and the water stop ring are pre-embedded before bottom plate concrete is poured, the steel sleeve is plugged layer by adopting the 8mm thick steel plate and the rubber sealing ring, and the 8mm thick steel plate with the ball valve is welded on the upper portion of the steel sleeve after the water yield is controlled. If the later stage basement come-up risk is great, can open the ball valve and reduce the water pressure that the bottom plate bore, reduce basement come-up risk. And if the basement does not have the floating risk, filling concrete and completing well sealing.
The above-described embodiments are merely preferred embodiments of the present invention, which should not be construed as limiting the invention. Various changes and modifications may be made by one of ordinary skill in the pertinent art without departing from the spirit and scope of the present invention. Therefore, the technical scheme obtained by adopting the mode of equivalent replacement or equivalent transformation is within the protection scope of the invention.
Claims (10)
1. A two-stage plugging construction method for a precipitation well with large water yield is characterized by comprising the following steps:
s1, installing a pre-buried sleeve (1) and a water stop ring (7) on a dewatering well of a basement bottom plate (11), wherein the bottom of the pre-buried sleeve (1) and the connecting position of the dewatering well are sealed and watertight, the top of the pre-buried sleeve extends into the elevation range of the basement bottom plate (11), and the water stop ring (7) is fixed on the periphery of the top of the pre-buried sleeve (1) in a surrounding mode;
s2, binding steel bars of the basement bottom plate (11), and fixing the embedded sleeve (1) and the water stop ring (7) in a steel bar mesh according to respective positioning positions; then, concrete pouring is carried out on the basement bottom plate (11) until the elevation is reached, and a reserved plugging port (12) communicated with the upper part of the basement bottom plate (11) is reserved at the top of the embedded sleeve (1) in the pouring process;
s3, filling a filter material (9) into the dewatering well (8) through the reserved plugging port (12), and filtering water flow gushed from the well;
s4, after the inner wall of the embedded sleeve (1) is cleaned, the built-in plugging plates (2) with the sealing rings (3) sleeved on the peripheries are pressed into the embedded sleeve (1) one by one, and each built-in plugging plate (2) is located on one cross section of the embedded sleeve (1) and is attached to the inner wall of the embedded sleeve (1) through the peripheral sealing ring (3); observing the flow of the water gushing out of the sleeve (1) to be embedded after the built-in plugging plate (2) is pressed in each time, and stopping pressing in a new built-in plugging plate (2) when the flow of the water gushing out is smaller than the preset flow;
s5, installing a top plugging plate (4) connected with a water outlet pipe (5) at the top of a pre-buried sleeve (1), sucking water flow gushed out of the pre-buried sleeve (1) through the water outlet pipe (5) by using a water pumping device, ensuring that the gushed water in the pre-buried sleeve (1) cannot overflow from the top, fully welding and fixing the top plugging plate (4) and the pre-buried sleeve (1) to completely seal the top of the pre-buried sleeve (1), then removing the water pumping device, and installing a control valve (6) for controlling the opening and closing of a water outlet on the water outlet pipe (5) to complete plugging construction in the first stage;
s6, after the plugging construction in the first stage is completed, the control valve (6) is kept closed and the floating risk of the basement is monitored, and if the floating risk caused by the underground water pressure occurs, the control valve (6) is opened to release the water pressure borne by the basement bottom plate (11);
and S7, after the basement is determined not to float upwards, filling the reserved plugging port (12) with concrete to form continuous sealing of the whole basement bottom plate (11), and completing the second stage of plugging construction.
2. The two-stage plugging construction method for the precipitation well with large water yield as claimed in claim 1, wherein the inner diameter of the embedded sleeve (1) is equal to the outer diameter of the precipitation well (8); the water stop ring (7) is a circular ring-shaped plate, and the inner diameter of the water stop ring is equal to the outer diameter of the embedded sleeve (1).
3. The two-stage plugging construction method for the precipitation well with the large water yield according to claim 1, wherein the embedded sleeve (1), the water stop ring (7), the built-in plugging plate (2) and the top plugging plate (4) are all made of steel, and the bottom surfaces of the built-in plugging plate (2) and the top plugging plate (4) are coated with anti-rust paint.
4. The two-stage plugging construction method for the precipitation well with large water yield as claimed in claim 3, characterized in that the inner wall of the reserved plugging port (12) is roughened in advance before concrete is filled.
5. The two-stage plugging construction method for the dewatering well with large water yield according to claim 1, characterized in that the thickness of the built-in plugging plate (2) is 7-9 mm, and the sealing ring (3) is a rubber sealing ring.
6. The two-stage plugging construction method for the dewatering well with the large water yield according to claim 1 is characterized in that before the built-in plugging plate (2) is installed, sundries on the inner wall of the embedded sleeve (1) need to be cleaned, and the inner wall is guaranteed to be smooth and flat.
7. The two-stage plugging construction method for the precipitation well with large water yield as claimed in claim 1, wherein a layer of base plate bedding (10) is laid in advance after the pre-buried sleeve (1) is fixed and before a reinforcing mesh of a basement base plate (11) is bound.
8. The two-stage plugging construction method for the precipitation well with the large water yield according to claim 1, wherein the filter material (9) is graded sandstone or low-grade concrete, and the filter material (9) in the precipitation well (8) is filled until the water quality of the gushing water is clear.
9. The two-stage plugging construction method for the precipitation well with the large water yield as claimed in claim 1, wherein the preset flow rate is the maximum pumping flow rate of a single pumping device.
10. The two-stage plugging construction method for the precipitation well with large water yield as claimed in claim 1, wherein the water pumping device is a self-priming pump, and the self-priming pump pumps water by inserting a water pipe into the water outlet pipe (5).
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| CN202111282221.9A CN114032936A (en) | 2021-11-01 | 2021-11-01 | Two-stage plugging construction method for large-water-yield dewatering well |
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| CN202111282221.9A CN114032936A (en) | 2021-11-01 | 2021-11-01 | Two-stage plugging construction method for large-water-yield dewatering well |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114703878A (en) * | 2022-05-07 | 2022-07-05 | 中建八局第二建设有限公司 | Plugging and draining device for dewatering well and construction method |
| CN115142454A (en) * | 2022-06-27 | 2022-10-04 | 中国建筑第八工程局有限公司 | Active pressure reduction well plugging method under large inrush force condition |
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| CN111441374A (en) * | 2020-01-14 | 2020-07-24 | 中建六局建设发展有限公司 | Quick plugging construction method for high-water-pressure deep foundation pit dewatering well |
| CN111593771A (en) * | 2020-04-02 | 2020-08-28 | 中建六局土木工程有限公司 | Construction method of anti-floating decompression system of basement bottom plate |
| CN111926841A (en) * | 2020-08-04 | 2020-11-13 | 中天建设集团有限公司 | Dewatering well water-carrying plugging structure and construction method thereof |
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2021
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| CN107059903A (en) * | 2017-05-26 | 2017-08-18 | 南通八建集团有限公司 | Bottom plate plugging dewatering well construction method is worn in foundation ditch |
| CN111441374A (en) * | 2020-01-14 | 2020-07-24 | 中建六局建设发展有限公司 | Quick plugging construction method for high-water-pressure deep foundation pit dewatering well |
| CN111593771A (en) * | 2020-04-02 | 2020-08-28 | 中建六局土木工程有限公司 | Construction method of anti-floating decompression system of basement bottom plate |
| CN111926841A (en) * | 2020-08-04 | 2020-11-13 | 中天建设集团有限公司 | Dewatering well water-carrying plugging structure and construction method thereof |
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| CN114703878A (en) * | 2022-05-07 | 2022-07-05 | 中建八局第二建设有限公司 | Plugging and draining device for dewatering well and construction method |
| CN115142454A (en) * | 2022-06-27 | 2022-10-04 | 中国建筑第八工程局有限公司 | Active pressure reduction well plugging method under large inrush force condition |
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