CN219862895U - Deep foundation pit dewatering well plugging structure - Google Patents
Deep foundation pit dewatering well plugging structure Download PDFInfo
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- CN219862895U CN219862895U CN202320233335.2U CN202320233335U CN219862895U CN 219862895 U CN219862895 U CN 219862895U CN 202320233335 U CN202320233335 U CN 202320233335U CN 219862895 U CN219862895 U CN 219862895U
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Abstract
The utility model relates to a deep foundation pit dewatering well plugging structure, which comprises a dewatering well, a water stopping sleeve, two water stopping wing rings, a sand filtering layer, a rubber water stopping plug, a first impervious concrete, a rubber sealing gasket, raft foundation concrete, a galvanized steel sheet and a second impervious concrete, wherein the water stopping sleeve is sleeved on the outer side of a wellhead of the dewatering well; the sand filter layer is arranged at the inner bottom of the dewatering well; the rubber water stop plug is arranged above the sand filter layer; the first impervious concrete is poured above the rubber water stop plug; the rubber sealing gasket is arranged above the first impervious concrete; the raft foundation concrete is poured outside the water-stopping sleeve, and a groove is reserved at the top of the water-stopping sleeve in the raft foundation concrete; the galvanized steel sheet is arranged at the top of the water stop sleeve, and the second impervious concrete is poured in the groove. The utility model can better improve the plugging effect of the dewatering well and meet the plugging quality requirement.
Description
Technical Field
The utility model belongs to the technical field of dewatering well plugging, and particularly relates to a deep foundation pit dewatering well plugging structure.
Background
In recent years, with the continuous development of urban construction, the depth of the building engineering is continuously increased, and ultra-deep foundation pits are also more and more. The deep well dewatering of the ultra-deep foundation pit is often accompanied with high-head pressure-bearing water, and the plugging difficulty is high due to the phenomena of large diameter of the dewatering well mouth, high water level, high water gushing speed and the like of the deep well dewatering well.
The pipe well is widely used for reducing the underground water level in the building engineering raft foundation engineering in the region with rich underground water, the designed underground water level still needs to be maintained during the construction period of the upper structure after the foundation construction is completed, and the precipitation can be stopped after the construction of the upper structure and the foundation settlement reach certain conditions, so that the precipitation well is closed. After dewatering is stopped, the traditional well sealing method is that broken stone is filled into the well to a certain height, then micro-expansion fine stone concrete is poured to a designed elevation, and then the round steel plate and the vertical long pipe are used for sealing and welding.
However, under the geological conditions of abundant groundwater and large permeability coefficient, after precipitation is stopped, the water level in the well rises fast, the traditional mode does not meet the plugging quality requirement, hidden leakage hazards exist, the plugging difficulty is large, and even plugging cannot be performed under the conditions of fast backwater and large water burst.
Disclosure of Invention
The utility model mainly aims to provide a deep foundation pit dewatering well plugging structure which can effectively solve the problems in the background technology.
In order to achieve the above purpose, the utility model is realized by the following technical scheme:
a deep foundation pit dewatering well plugging structure comprises
A dewatering well,
the water-stopping sleeve is sleeved on the outer side of the wellhead of the dewatering well, and micro-expansion waterproof concrete is filled in the lap joint area of the water-stopping sleeve and the dewatering well;
two water stop wing rings are arranged on the outer side wall of the water stop sleeve up and down;
the sand filtering layer is arranged at the inner bottom of the dewatering well;
the rubber water stop plug is arranged above the sand filter layer;
the first impervious concrete is poured above the rubber water stop plug;
the rubber sealing gasket is arranged above the first impervious concrete;
the raft foundation concrete is poured outside the water-stopping sleeve, and a groove is reserved at the top of the water-stopping sleeve in the raft foundation concrete;
the galvanized steel plate is arranged at the top of the water stop sleeve and is used for pressing the rubber sealing gasket;
and a second impervious concrete layer is poured in the groove.
Preferably, the outside of stagnant water sleeve pipe bottom is provided with the bed course, the top of bed course is provided with the waterproof layer, the waterproof layer includes horizontal part and vertical part, horizontal part is hugged closely the upper surface of bed course, horizontal part's top is provided with waterproof protection layer, vertical part is hugged closely the outside wall of stagnant water sleeve pipe extends to the lower part stagnant water wing ring department, the corner outside of waterproof layer is provided with waterproof enhancement layer.
Preferably, the diameter of the rubber water stop plug is slightly larger than the inner diameter of the dewatering well.
Preferably, the first pass of impervious concrete and the raft foundation concrete have the same level of impervious.
Preferably, the second path of the anti-permeability concrete has an anti-permeability level that is one level higher than the raft foundation concrete.
Preferably, the distance between the top surface of the sand filtering layer and the bottom surface of the raft foundation concrete is 2m.
Preferably, the width of the two water stopping wing rings is 400mm, and the two water stopping wing rings are respectively arranged at the positions 100mm up and down from the horizontal central axis of the water stopping sleeve.
The utility model provides a deep foundation pit dewatering well plugging structure, which has the following beneficial effects that;
the waterproof sealing structure is characterized in that two water stop wing rings are arranged on the outer side wall of the waterproof sleeve, the water stop effect of the plugging structure of the dewatering well is improved by increasing the seepage path, meanwhile, the overall stability of the waterproof sealing structure can be improved by arranging the two water stop wing rings, underground water can be better prevented from permeating, a sand filter layer, a rubber water stop plug, first impervious concrete and a rubber sealing gasket are arranged in the dewatering well from bottom to top, a galvanized steel sheet is arranged at the top of the waterproof sealing sleeve to press the rubber sealing gasket, then second impervious concrete is poured in the groove, the plugging effect of the dewatering well can be better improved by the structure, the plugging quality requirement is met, the problem that leakage hidden danger exists in plugging of the dewatering well is solved, the difficulty is high, even the plugging cannot be performed under the condition that water return is fast and water burst is large, and the waterproof quality of underground engineering is better guaranteed.
Drawings
Fig. 1 is a schematic diagram of the overall structure of the present utility model.
In the figure: 1. dewatering well; 2. a water stop sleeve; 3. a water stop wing ring; 4. micro-expansion waterproof concrete; 5. a sand filter layer; 6. rubber water stop plugs; 7. a first pass of impervious concrete; 8. a rubber gasket seal; 9. raft foundation concrete; 10. zinc-plated steel sheet; 11. a second pass of impervious concrete; 12. a cushion layer; 13. a waterproof layer; 14. a waterproof reinforcing layer; 15. and a waterproof protective layer.
Detailed Description
In order to make the objects, technical solutions and advantages of the present utility model more apparent, the technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the present utility model.
The technical solutions of the present utility model will be clearly and completely described in connection with the embodiments, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more of the described features. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise. Furthermore, the terms "mounted," "connected," "coupled," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.
The embodiment is shown in fig. 1, and the deep foundation pit dewatering well plugging structure comprises a dewatering well 1, a water stopping sleeve 2, a two-channel water stopping wing ring 3, a sand filtering layer 5, a rubber water stopping plug 6, a first impervious concrete 7, a rubber sealing gasket 8, raft foundation concrete 9, a galvanized steel plate 10 and a second impervious concrete 11, wherein the dewatering well 1 is arranged in the soil body at the bottom of the deep foundation pit, the water stopping sleeve 2 is sleeved at the outer side of a wellhead of the dewatering well 1, the bottom of the water stopping sleeve is inserted into the soil body at the bottom of the deep foundation pit, and a micro-expansion waterproof concrete 4 is filled in a lap joint area of the water stopping sleeve 2 and the dewatering well 1; the two water stop wing rings 3 are arranged on the outer side wall of the water stop sleeve 2 up and down; the sand filter layer 5 is arranged at the inner bottom of the dewatering well 1; the rubber water stop plug 6 is arranged above the sand filter layer 5; the first impervious concrete 7 is poured above the rubber water stop plug 6; a rubber sealing gasket 8 is arranged above the first impervious concrete 7; the raft foundation concrete 9 is poured outside the water-stop sleeve 2, and a groove is reserved in the raft foundation concrete 9 at the top of the water-stop sleeve 2; a galvanized steel sheet 10 is arranged on the top of the water stop sleeve 2 and is used for pressing against the rubber sealing gasket 8; a second pass of impervious concrete 11 is poured in the grooves.
In a specific embodiment, the outer side of the bottom of the water stop sleeve 2 is provided with a cushion layer 12, the upper side of the cushion layer 12 is provided with a waterproof layer 13, the waterproof layer 13 comprises a horizontal part and a vertical part, the horizontal part is clung to the upper surface of the cushion layer 12, the upper side of the horizontal part is provided with a waterproof protection layer 15, the vertical part is clung to the outer side wall of the water stop sleeve 2 and extends to the lower part of the water stop wing ring 3, the outer side of the corner of the waterproof layer 13 is provided with a waterproof reinforcing layer 14, and both the waterproof layer 13 and the waterproof reinforcing layer 14 are made of waterproof coiled materials.
In a specific embodiment, the diameter of the rubber water stop 6 is slightly larger than the inner diameter of the dewatering well 1.
In a specific embodiment, the first pass of impervious concrete 7 and the raft foundation concrete 9 are of the same level of impervious.
In a specific embodiment, the second layer of impervious concrete 11 has a level of impervious that is one level higher than the raft foundation concrete 9.
In a specific embodiment, the distance between the top surface of the sand filter layer 5 and the bottom surface of the raft foundation concrete 9 is 2m.
In a specific embodiment, the width of the two water stop wing rings 3 is 400mm, and the two water stop wing rings are respectively arranged at positions 100mm above and below the horizontal central axis of the water stop sleeve 2.
The utility model also provides a specific construction method of the deep foundation pit dewatering well plugging structure, which comprises the following steps:
step one, preparing materials;
sand with certain grading, a rubber water stop plug 6, a water stop sleeve 2, a water stop wing ring 3, a waterproof coiled material, a rubber sealing gasket 8, a galvanized steel sheet 10 and the like.
Step two, manufacturing and installing a water stop sleeve 2;
1) The water stop effect of the plugging structure of the dewatering well is improved by arranging one water stop wing ring 3 with the width of 400mm on the upper and lower 100mm distances of the horizontal central axis of the water stop sleeve 2 respectively and arranging two water stop wing rings 3 in a mode of increasing seepage paths, and meanwhile, the overall stability of the water stop sleeve 2 during installation can be improved by arranging the two water stop wing rings 3;
2) The water-stop sleeve 2 is sleeved on the outer side of a wellhead of the dewatering well 1, the bottom of the water-stop sleeve is inserted into soil at the bottom of a deep foundation pit, and a lap joint area of the water-stop sleeve 2 and the dewatering well 1 is filled with micro-expansion waterproof concrete 4 for plugging, so that groundwater is prevented from penetrating outwards from the lap joint area, and the overall water-stop effect of the dewatering well plugging structure is improved;
3) According to the normal construction flow, the foundation pit around the water stop sleeve 2 is firstly provided with a cushion layer 12, then provided with a waterproof layer 13, the outer side of the corner of the waterproof layer 13 is provided with a waterproof reinforcing layer 14, then provided with a waterproof protective layer 15, and finally poured with raft foundation concrete 9, and a groove is reserved in the top of the water stop sleeve 2 in the raft foundation concrete 9, so that the operation of the subsequent process is facilitated.
Step three, setting a filling structure in the dewatering well 1;
1) The precipitation well 1 is filled with a sand filtering layer 5 with a certain height, the diameter of the sand is 5mm, sand with a certain grading and good roundness is used for filling, and the distance between the top surface of the sand filtering layer 5 after filling and the bottom surface of the raft foundation concrete 9 is 2m;
2) A rubber water stop plug 6 is arranged above the sand filter layer 5, and the diameter of the rubber water stop plug 6 is slightly larger than the inner diameter of the dewatering well 1, so that the periphery of the rubber water stop plug 6 is tightly attached to the inner wall of the dewatering well 1, underground water is prevented from penetrating upwards, and the water stop effect is improved;
3) And a first impervious concrete 7 with the same impervious grade as the raft foundation concrete 9 is poured above the rubber water stop plug 6, the pouring height of the first impervious concrete 7 is slightly lower than the top of the water stop sleeve 2, and the pouring of the first impervious concrete 7 can better improve the water blocking and water insulating performance of the dewatering well plugging structure.
Step four, the top structure of the water stop sleeve 2 is arranged;
1) A rubber sealing gasket 8 with a certain thickness is arranged above the first impervious concrete 7, the rubber sealing gasket 8 is pressed by a galvanized steel plate 10, no gap is reserved between the water stop sleeve 2 and the galvanized steel plate 10 after the galvanized steel plate 10 is pressed, and the rubber sealing gasket 8 is tightly attached to the inner wall of the water stop sleeve 2;
2) After the galvanized steel sheet 10 is set by capping, roughening the surface of the reserved groove in the raft foundation concrete 9, cleaning, and pouring second impervious concrete 11 with a level higher than the impervious level of the raft foundation concrete 9 in the groove.
According to the utility model, the two water stop wing rings 3 are arranged on the outer side wall of the water stop sleeve 2, the water stop effect of the dewatering well plugging structure is improved by adding the seepage path, meanwhile, the overall stability of the water stop sleeve 2 during installation can be improved by arranging the two water stop wing rings 3, underground water penetration can be better prevented, the sand filter layer 5, the rubber water stop plug 6, the first impervious concrete 7 and the rubber sealing gasket 8 are arranged in the dewatering well 1 from bottom to top, the galvanized steel sheet 10 is arranged on the top of the water stop sleeve 2 to press the rubber sealing gasket 8, and then the second impervious concrete 11 is poured in the groove.
The above embodiments are only for illustrating the technical solution of the present utility model, and are not limiting; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present utility model.
Claims (7)
1. The utility model provides a deep basal pit dewatering well plugging structure which characterized in that: comprising
A dewatering well,
the water-stopping sleeve is sleeved on the outer side of the wellhead of the dewatering well, and micro-expansion waterproof concrete is filled in the lap joint area of the water-stopping sleeve and the dewatering well;
two water stop wing rings are arranged on the outer side wall of the water stop sleeve up and down;
the sand filtering layer is arranged at the inner bottom of the dewatering well;
the rubber water stop plug is arranged above the sand filter layer;
the first impervious concrete is poured above the rubber water stop plug;
the rubber sealing gasket is arranged above the first impervious concrete;
the raft foundation concrete is poured outside the water-stopping sleeve, and a groove is reserved at the top of the water-stopping sleeve in the raft foundation concrete;
the galvanized steel plate is arranged at the top of the water stop sleeve and is used for pressing the rubber sealing gasket;
and a second impervious concrete layer is poured in the groove.
2. The deep foundation pit dewatering well plugging structure according to claim 1, wherein: the waterproof layer is arranged on the outer side of the bottom of the water-stop sleeve, the waterproof layer comprises a horizontal portion and a vertical portion, the horizontal portion is tightly attached to the upper surface of the cushion layer, a waterproof protection layer is arranged on the upper portion of the horizontal portion, the vertical portion is tightly attached to the outer side wall of the water-stop sleeve and extends to the water-stop wing ring of the lower portion, and a waterproof reinforcing layer is arranged on the outer side of a corner of the waterproof layer.
3. The deep foundation pit dewatering well plugging structure according to claim 1, wherein: the diameter of the rubber water stop plug is slightly larger than the inner diameter of the dewatering well.
4. The deep foundation pit dewatering well plugging structure according to claim 1, wherein: the first impervious concrete and the raft foundation concrete have the same impervious grade.
5. The deep foundation pit dewatering well plugging structure according to claim 1, wherein: the second layer of impervious concrete has a level of impervious grade that is one level higher than the raft foundation concrete.
6. The deep foundation pit dewatering well plugging structure according to claim 1, wherein: the distance between the top surface of the sand filtering layer and the bottom surface of the raft foundation concrete is 2m.
7. The deep foundation pit dewatering well plugging structure according to claim 1, wherein: the width of the two water stopping wing rings is 400mm, and the two water stopping wing rings are respectively arranged at the positions 100mm above and below the horizontal central axis of the water stopping sleeve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320233335.2U CN219862895U (en) | 2023-02-16 | 2023-02-16 | Deep foundation pit dewatering well plugging structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320233335.2U CN219862895U (en) | 2023-02-16 | 2023-02-16 | Deep foundation pit dewatering well plugging structure |
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| Publication Number | Publication Date |
|---|---|
| CN219862895U true CN219862895U (en) | 2023-10-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320233335.2U Active CN219862895U (en) | 2023-02-16 | 2023-02-16 | Deep foundation pit dewatering well plugging structure |
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| CN (1) | CN219862895U (en) |
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- 2023-02-16 CN CN202320233335.2U patent/CN219862895U/en active Active
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