CN210946855U - Plugging device for dewatering well - Google Patents
Plugging device for dewatering well Download PDFInfo
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- CN210946855U CN210946855U CN201920987984.5U CN201920987984U CN210946855U CN 210946855 U CN210946855 U CN 210946855U CN 201920987984 U CN201920987984 U CN 201920987984U CN 210946855 U CN210946855 U CN 210946855U
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Abstract
The utility model discloses a precipitation well plugging device, including precipitation well, steel casing pipe, stagnant water steel sheet and slip casting steel pipe, the steel casing pipe with the precipitation well is connected, the steel casing pipe upper end is provided with the stagnant water steel sheet, be provided with the slip casting mouth on the stagnant water steel sheet, the slip casting steel pipe is located in the steel casing pipe, just the slip casting steel pipe passes the slip casting mouth. The utility model discloses simple and easy, convenient operation, wide application, the shutoff is reliable and the cost is lower, simple structure, the shutoff that is applicable to underground structure precipitation well, the shutoff of specially adapted subway station high pressure precipitation well and the poor, the station geological conditions of station have the more condition of percolating water, the utility model discloses the shutoff success rate is high, and the shutoff is effectual, and the slip casting can be consolidated basement soil and the matter reduces the structure and subsides, can improve major structure antiseep water performance moreover, reduces later stage leaking stoppage cost, and the practicality is strong, and popularization prospect is good.
Description
Technical Field
The utility model relates to a deep basal pit pressure-bearing precipitation well construction and underground structure antiseep water construction field, specific theory relates to and is a precipitation well plugging device.
Background
Urban rail transit is an important tool for relieving traffic pressure of large cities, and is gradually in a normalized trend in China, and the quality of underground water treatment in an underground structure is closely related to the usability function of a building structure, so that the problem to be solved is how to improve the waterproof treatment work of high underground water level under unfavorable geological conditions.
Meanwhile, deep foundation pit dewatering engineering is an important link of urban rail transit construction and is also widely concerned in the rapid development of urban rail transit, wherein a well point dewatering method is a commonly used dewatering method, but when a dewatering well is plugged in the later period, well sealing becomes a difficult problem under the high head pressure.
The method comprises the following steps of backfilling a sandstone mixed aggregate, a plugging king and high-grade concrete into a precipitation well, and finally welding a steel plate in a seamless manner; the second scheme is to use the plugging air bag to temporarily isolate the underground water, and weld a water stop steel plate and backfill concrete above the well pipe to perform permanent plugging.
However, when the water pressure is high, once the precipitation water level is stopped, the precipitation well can quickly rise, concrete aggregate and plugging royal jelly backfilled in the first scheme can be quickly separated and cannot be condensed to achieve the water stopping effect, although the precipitation well can be plugged smoothly in the second scheme, underground water can flow around along the bottom plate and the side wall due to the high water pressure, new cracks can be generated at the weak part of the side wall of the main body of a station under unfavorable geological conditions, new leakage points can be formed at the part with the cracks, and the construction cost of later-stage plugging is greatly increased. Therefore, the selection of an effective and non-violent plugging method becomes a difficult problem for plugging the high-pressure precipitation well.
The above-mentioned drawbacks, worth improving.
Disclosure of Invention
In order to overcome the defects of the prior art, the utility model provides a precipitation well plugging device.
The utility model discloses technical scheme as follows:
the utility model provides a precipitation well plugging device, includes the precipitation well, still includes steel casing pipe, stagnant water steel sheet and slip casting steel pipe, the steel casing pipe with the precipitation well is connected, the steel casing pipe upper end is provided with the stagnant water steel sheet, be provided with the slip casting mouth on the stagnant water steel sheet, the slip casting steel pipe is located in the steel casing pipe, just the slip casting steel pipe passes the slip casting mouth.
Furthermore, the dewatering well is a patterned steel pipe, the dewatering well is fixedly connected with the steel sleeve through welding, and first sealant is arranged at the position of a welding seam of the dewatering well and the steel sleeve.
Further, the steel sleeve and the water stop steel plate are fixedly connected through welding, and second sealant is arranged at the position of a welding seam of the steel sleeve and the water stop steel plate.
Furthermore, be provided with the hydrofoil on the steel casing pipe, the hydrofoil below is provided with waterproofing membrane, just waterproofing membrane's connection port department is provided with the sealed glue of third.
Furthermore, the steel sleeve and the water stop wing are fixedly connected through welding, and fourth sealant is arranged at the position of a welding seam of the steel sleeve and the water stop wing.
Furthermore, the water-saving leakage-stopping device further comprises gravels, a leakage-stopping king and a grouting solution, wherein the gravels, the leakage-stopping king and the grouting solution are all arranged in the dewatering well and the steel casing, the lower part of the leakage-stopping king is connected with the gravels, and the upper part of the leakage-stopping king is connected with the water-stopping steel plate.
Further, the grouting solution comprises single-fluid slurry and double-fluid slurry.
Further, the material of the grouting solution comprises cement and water glass, the water cement ratio of the cement slurry is 1:1, the double-liquid slurry comprises a first double-liquid slurry and a second double-liquid slurry, the volume ratio of the cement slurry to the water glass of the first double-liquid slurry is 1:3, and the volume ratio of the cement slurry to the water glass of the second double-liquid slurry is 1: 1.
Furthermore, the water stop steel plate is provided with micro-expansion concrete.
Further, the thickness of the micro-expansion concrete is 30 cm.
According to the above scheme the utility model discloses, its beneficial effect lies in, the utility model discloses simple and easy, convenient operation, wide application, the shutoff is reliable and the cost is lower, simple structure, the shutoff that is applicable to underground structure precipitation well, the shutoff of specially adapted subway station high pressure precipitation well and the station geological conditions are poor, the station has the more condition of percolating water, the utility model discloses the shutoff success rate is high, and the shutoff is effectual, and the slip casting can be consolidated basement soil matter and reduce the structure and subside, can improve major structure anti seepage water performance moreover, reduces later stage leaking stoppage cost, and the practicality is strong, and popularization prospect is good.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is the utility model discloses a backfill leaking stoppage king and installation stagnant water steel sheet schematic diagram.
Fig. 3 is a schematic view of the grouting of the present invention.
In the figure, 1, a precipitation well; 2. steel casing; 3. grouting the steel pipe; 4. a water stop steel plate; 5. leak stopping; 6. gravel; 7. micro-expansive concrete; 8. a water stopping wing; 9. fourth sealant; 10. a second sealant; 11. double-liquid slurry; 12. grouting machine; 13. waterproof coiled materials; 14. a waterproof reinforcing layer; 15. a self-priming pump.
Detailed Description
The invention is further described with reference to the following figures and embodiments:
as shown in fig. 1-3, the plugging device for the dewatering well comprises a dewatering well 1, a steel sleeve 2, a water stop steel plate 4, a grouting steel pipe 3, gravels 6, a plugging king 5 and a grouting solution.
The dewatering well 1 is a patterned steel pipe, the dewatering well 1 is fixedly connected with the steel sleeve 2 through welding, and first sealant is arranged at the position of a welding seam of the dewatering well 1 and the steel sleeve 2.
The upper end of the steel sleeve 2 is provided with the water stop steel plate 4, the steel sleeve 2 is fixedly connected with the water stop steel plate 4 through welding, and a second sealant 10 is arranged at the position of a welding seam of the steel sleeve 2 and the water stop steel plate 4.
The water stop steel plate 4 is provided with a grouting opening, the grouting steel pipe 3 is arranged in the steel sleeve 2, and the grouting steel pipe 3 penetrates through the grouting opening.
Be provided with only hydrofoil 8 on the steel casing 2, only hydrofoil 8 below is provided with waterproofing membrane 13, just waterproofing membrane 13's connector port department is provided with the sealed glue of third.
The steel sleeve 2 is fixedly connected with the water stop wing 8 through welding, and fourth sealant 9 is arranged at the position of a welding seam of the steel sleeve 2 and the water stop wing 8.
The first sealant, the second sealant 10, the third sealant and the fourth sealant 9 are all single-component polyurethane sealants.
The gravel 6, the leakage stoppage king 5 and the grouting solution are all arranged in the dewatering well 1 and the steel sleeve 2, the lower part of the leakage stoppage king 5 is connected with the gravel 6, and the upper part of the leakage stoppage king 5 is connected with the water stop steel plate 4.
The grouting solution comprises single-fluid slurry and double-fluid slurry 11. The grouting solution comprises cement and water glass, the water cement ratio of cement slurry is 1:1, the double-liquid slurry 11 comprises a first double-liquid slurry and a second double-liquid slurry, the volume ratio of the cement slurry to the water glass of the first double-liquid slurry is 1:3, and the volume ratio of the cement slurry to the water glass of the second double-liquid slurry is 1: 1. The grouting steel pipe 3 pumps and discharges underground water through a self-priming pump 15, and the grouting steel pipe 3 is grouted through a grouting machine.
The water stop steel plate 4 is provided with micro-expansion concrete 7, and the thickness of the micro-expansion concrete 7 is 30 cm.
In this embodiment:
preferably, the water stop wing is a steel plate with the width of 100mm and the thickness of 8mm, is positioned in the middle of the concrete of the bottom plate, and is required to be welded with the steel sleeve in a seamless mode.
Preferably, the water stop steel plate is located 30cm below the top surface of the bottom plate and is fully welded with the steel sleeve, a grouting opening is reserved in the middle of the water stop steel plate, and the grouting pipe penetrates through the grouting opening of the water stop steel plate to perform grouting to the inside of the well to block the dewatering well.
The utility model discloses a concrete construction steps as follows:
step 1: and welding the steel sleeve with the water stop wing. After the foundation pit is excavated and the bottom plate cushion layer is poured, the steel sleeve is welded and connected with the opening of the patterned steel pipe of the dewatering well in time, and the dewatering well keeps continuous pumping and drainage in the welding process, so that underground water is prevented from overflowing out of the well mouth to influence construction.
Step 2: and (5) waterproof construction outside the steel sleeve. The bottom of the steel sleeve and the bottom plate cushion layer are smeared into a chamfer shape by mortar, a waterproof reinforcing layer with the width of 50cm is added at the corner position, a waterproof coiled material is arranged on the waterproof reinforcing layer, the waterproof coiled material is tightly attached to the steel sleeve and is rolled up to the lower edge position of the water stop wing, the port of the waterproof coiled material is sealed by single-component polyurethane sealant, and the water stop wing and the welded position of the steel sleeve are coated with the single-component polyurethane sealant.
And step 3: pre-burying a grouting steel pipe and backfilling gravel. The construction of the main structure top plate is completed, and the dewatering well is blocked after the strength is reached, firstly, ∅ 30 x 2.5mm seamless steel pipes are adopted in the grouting pipes, the steel pipes are inserted into the position about 0.3m below the bottom plate, and screw threads are reserved on the upper parts of the steel pipes so as to facilitate the connection of later grouting machine connectors; and after the grouting pipe is fixed, gravel is backfilled on the periphery of the grouting pipe, the diameter of the gravel is 2-3 cm, and the height of a backfilling top is 50cm lower than that of the bottom plate.
And 4, step 4: and (5) backfilling the plugging king and sealing a steel plate. After the grouting pipe is installed and fixed, a self-sucking pump is installed at the end head of the grouting pipe, underground water in the precipitation well is pumped and drained in time, meanwhile, other peripheral precipitation wells are kept to continuously precipitate water, so that the water pressure of the precipitation well at the mouth is reduced, then, a leakage stoppage king with the thickness of about 20cm is backfilled on the surface of the gravel layer, and the water outlet surface of the wellhead is completely transferred to flow out of the grouting pipe. And then, the water stop steel plate is welded with the steel sleeve in a seamless mode, wherein the diameter of the water stop steel plate is smaller than the inner diameter of the steel sleeve by about 3mm, a grouting opening is reserved in the middle of the water stop steel plate, and the grouting steel pipe is led out from the grouting opening and is welded with the water stop steel plate in a seamless mode.
And 5: and (5) grouting the dewatering well. The grouting material mainly comprises P.O42.5 cement and water glass, and the water cement ratio of the cement slurry is 1: 1. In the stage of starting grouting, adopting liquid cement slurry, controlling the single-pipe grouting pressure to be 1-2 MPa, and controlling the double-pipe grouting pressure to be 2-3 MPa, so that the liquid cement can flow along gaps of blind ditches, poor geological layers and side walls to block water seepage channels, the stopping time of grouting is generally until grout is discharged within the length range of 2 wells around the well, the specific time is actually adjusted according to the field condition, adopting double-liquid grouting after liquid cement grouting is finished, wherein the volume ratio of the liquid cement to the water glass is 1:3, the purpose is to block the water seepage channels which cannot be blocked by the liquid cement slurry, and adopting double-liquid grouting at the volume ratio of the liquid cement to the water glass of 1:1 in the stage of the tail stage of grouting, and the purpose is to block the wellhead of a dewatering well to prevent water seepage.
Step 6: and backfilling the micro-expansion concrete seal. And after grouting is finished and the double-liquid slurry is solidified, chiseling concrete within the range of 5cm around the mouth of the dewatering well, chiseling to 5cm in depth, cutting the extended steel sleeve and the grouting pipe after chiseling, and backfilling the micro-expansive concrete with the thickness of 30cm to seal the opening tightly.
The utility model relates to a rational in infrastructure, simple structure, convenient operation are applicable to the shutoff of underground structure precipitation well, and the more condition of percolating water exists in the shutoff of specially adapted subway station high pressure precipitation well and the poor, the station geological conditions of station.
The utility model discloses to the geological conditions poor, the higher precipitation well shutoff success rate of groundwater level high, the shutoff is effectual. The utility model discloses the slip casting can be consolidated basement soil matter and is reduced the structure and subside, can improve major structure antiseep water performance moreover, reduces later stage leaking stoppage cost, and the practicality is strong, and popularization prospect is good.
It will be understood that modifications and variations can be made by persons skilled in the art in light of the above teachings and all such modifications and variations are considered to be within the scope of the invention as defined by the following claims.
The above exemplary description of the present invention is made in conjunction with the accompanying drawings, and it is obvious that the present invention is not limited by the above manner, and various improvements made by the method concept and technical solution of the present invention or by directly applying the concept and technical solution of the present invention to other occasions without improvement are all within the protection scope of the present invention.
Claims (10)
1. The utility model provides a precipitation well plugging device, includes the precipitation well, its characterized in that still includes steel casing pipe, stagnant water steel sheet and slip casting steel pipe, the steel casing pipe with the precipitation well is connected, the steel casing pipe upper end is provided with the stagnant water steel sheet, be provided with the slip casting mouth on the stagnant water steel sheet, the slip casting steel pipe is located in the steel casing pipe, just the slip casting steel pipe passes the slip casting mouth.
2. The plugging device of dewatering well according to claim 1, characterized in that the dewatering well is a patterned steel pipe, the dewatering well is fixedly connected with the steel casing pipe by welding, and a first sealant is arranged at the position of a welding seam between the dewatering well and the steel casing pipe.
3. The plugging device for dewatering well according to claim 1, wherein the steel sleeve is fixedly connected with the water stop steel plate by welding, and a second sealant is arranged at the position of a welding seam of the steel sleeve and the water stop steel plate.
4. The dewatering well plugging device according to claim 1, wherein a water stopping wing is arranged on the steel sleeve, a waterproof coiled material is arranged below the water stopping wing, and a third sealant is arranged at a connecting port of the waterproof coiled material.
5. The plugging device for dewatering well according to claim 4, wherein the steel sleeve is fixedly connected with the water stopping wing through welding, and a fourth sealant is arranged at the position of a welding seam of the steel sleeve and the water stopping wing.
6. The plugging device for dewatering well according to claim 1, further comprising gravel, plugging king and grouting solution, wherein the gravel, the plugging king and the grouting solution are all arranged in the dewatering well and the steel casing, the lower part of the plugging king is connected with the gravel, and the upper part of the plugging king is connected with the water stop steel plate.
7. The dewatering well plugging device according to claim 6, wherein the grouting solution comprises single grout and double grout.
8. The dewatering well plugging device according to claim 7, wherein the material of the grouting solution comprises cement and water glass, the water cement ratio of cement slurry is 1:1, the double-liquid slurry comprises a first double-liquid slurry and a second double-liquid slurry, the volume ratio of the cement slurry to the water glass of the first double-liquid slurry is 1:3, and the volume ratio of the cement slurry to the water glass of the second double-liquid slurry is 1: 1.
9. The plugging device for dewatering well according to claim 1, wherein the water stopping steel plate is provided with micro-expansion concrete.
10. The dewatering well plugging device according to claim 9, wherein the micro-expansive concrete has a thickness of 30 cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920987984.5U CN210946855U (en) | 2019-06-28 | 2019-06-28 | Plugging device for dewatering well |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920987984.5U CN210946855U (en) | 2019-06-28 | 2019-06-28 | Plugging device for dewatering well |
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| CN210946855U true CN210946855U (en) | 2020-07-07 |
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| CN201920987984.5U Active CN210946855U (en) | 2019-06-28 | 2019-06-28 | Plugging device for dewatering well |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113585370A (en) * | 2021-07-30 | 2021-11-02 | 广州市城市规划勘测设计研究院 | Plugging method for core-pulling hole |
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2019
- 2019-06-28 CN CN201920987984.5U patent/CN210946855U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113585370A (en) * | 2021-07-30 | 2021-11-02 | 广州市城市规划勘测设计研究院 | Plugging method for core-pulling hole |
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