CN215669620U - Plugging structure of dewatering well - Google Patents
Plugging structure of dewatering well Download PDFInfo
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- CN215669620U CN215669620U CN202121311994.0U CN202121311994U CN215669620U CN 215669620 U CN215669620 U CN 215669620U CN 202121311994 U CN202121311994 U CN 202121311994U CN 215669620 U CN215669620 U CN 215669620U
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Abstract
The utility model provides a plugging structure of a dewatering well, which comprises: the dewatering well is arranged in a foundation, and a cushion layer, a waterproof layer and a raft foundation layer are sequentially paved above the foundation; pressure release pipeline, pressure release pipeline pierces through bed course, waterproof layer and raft foundation layer, pressure release pipeline's one end with precipitation well connection, pressure release pipeline's the other end stretches out raft foundation layer, pressure release pipeline is used for preventing groundwater from following get into in the pressure release pipeline bed course, waterproof layer, raft foundation layer. The technical scheme of the utility model ensures that the raft foundation layer is not damaged when the ground water level returns.
Description
Technical Field
The utility model relates to the field of construction engineering construction, in particular to a plugging structure of a dewatering well.
Background
For a long time, during the process of earth excavation of most deep foundation pit projects in China, the situations of overhigh underground water level and overlarge surface water volume are met, and in order to effectively improve construction conditions and ensure construction safety, a dewatering well is reasonably arranged outside a foundation pit usually.
After the precipitation well stops precipitation, the precipitation well at the raft position in the foundation pit needs to be plugged according to the requirements of building functions, referring to fig. 1, fig. 1 is a plugging structure of the existing precipitation well, in order to facilitate plugging of the precipitation well, an iron pipe is generally adopted as a well pipe of the precipitation well, and a water stop plate is welded on the periphery of the well pipe. Cement mortar is injected into the well pipe, and the mouth of the well pipe is welded with a water stop plate for sealing.
The above technical solution has the following disadvantages: firstly, sealing the dewatering well and then pouring a raft, and after the underground water level rises, the problems that a waterproof cushion layer, a waterproof coiled material and a waterproof layer are soaked by underground accumulated water and the top is damaged can be caused; if the water level buoyancy is too large after the underground water level rises, the basement structure floats upwards.
Therefore, a new plugging structure of a dewatering well is needed to be provided to solve the problem that the raft foundation layer is damaged after the groundwater level rises.
SUMMERY OF THE UTILITY MODEL
In view of the above, the present invention provides a plugging structure for dewatering wells, so that the raft foundation layer is not damaged when the ground water level is raised.
In order to achieve the above object, the present invention provides a plugging structure for dewatering well, comprising:
the dewatering well is arranged in a foundation, and a cushion layer, a waterproof layer and a raft foundation layer are sequentially paved above the foundation;
pressure release pipeline, pressure release pipeline pierces through bed course, waterproof layer and raft foundation layer, pressure release pipeline's one end with precipitation well connection, pressure release pipeline's the other end stretches out raft foundation layer, pressure release pipeline is used for preventing groundwater from following get into in the pressure release pipeline bed course, waterproof layer, raft foundation layer.
Optionally, the pressure release pipeline with the precipitation well is connected through first stagnant water ring, the inner border of first stagnant water ring with the one end fixed connection of pressure release pipeline, and the internal diameter more than or equal to of first stagnant water ring the internal diameter of pressure release pipeline, the external diameter of first stagnant water ring is greater than the internal diameter of precipitation well, the precipitation well is close to the well head of pressure release pipeline is connected to on the terminal surface of first stagnant water ring.
Optionally, a portion of the foundation, which is close to the pressure relief pipeline, is recessed downward to form a groove surrounding the pressure relief pipeline, a wellhead of the dewatering well is flush with the bottom of the groove, and the thickness of the part of the cushion layer, which is located in the groove, is greater than the thickness of the rest parts.
Optionally, a second water stop ring is arranged on the outer wall of the pressure relief pipeline.
Optionally, the waterproof layer near the periphery of the pressure relief pipeline extends in the raft foundation layer towards a direction away from the dewatering well, and is fixed on the outer wall of the pressure relief pipeline in a sealing manner.
Optionally, the other end of the pressure relief pipeline is provided with a first water stop plate for sealing the pressure relief pipeline.
Optionally, the dewatering well is sequentially filled with a rubble layer, a clay layer and a micro-expansive agent-doped anti-permeability concrete layer from one end far away from the pressure relief pipeline to the other end close to the pressure relief pipeline; and the pressure relief pipeline is filled with an anti-permeability concrete layer doped with a micro-expanding agent.
Optionally, a second water stop plate is further arranged in the pressure relief pipeline, the edge of the second water stop plate is fixedly connected with the inner wall of the pressure relief pipeline, and the second water stop plate is wrapped by the micro-expansion agent-doped anti-permeability concrete up and down and used for plugging the pressure relief pipeline.
Optionally, the pressure relief pipeline is made of galvanized water stop steel.
According to the plugging structure of the dewatering well, the pressure relief pipeline is arranged above the dewatering well, so that the problems that a waterproof cushion layer, a waterproof coiled material and a waterproof layer are soaked by underground water and are damaged by jacking cannot be caused after the underground water level rises.
Drawings
FIG. 1 is a schematic structural diagram of a plugging structure of a conventional dewatering well;
fig. 2 is a schematic view of a plugging structure of a dewatering well according to an embodiment of the present invention.
Wherein the reference numerals of figures 1-2 are as follows:
01-a cushion layer; 02-waterproof layer; 03-raft foundation layer; 11-a pressure relief duct; 12-a first water stop ring; 13-a second water stop ring; 14-a first water stop plate; 15-a second water stop plate; 20-dewatering well; 21-gravel particle layer; 22-clay layer; 23-anti-seepage concrete layer doped with micro-expansion agent; 24-impervious concrete layer of micro-expansion agent.
Detailed Description
In order to make the objects, advantages and features of the present invention more clear, the plugging structure of dewatering well proposed by the present invention is further described in detail with reference to the attached drawings 1 to 2. It is to be noted that the drawings are in a very simplified form and are not to precise scale, which is merely for the purpose of facilitating and distinctly claiming the embodiments of the present invention.
Referring to fig. 2, fig. 2 is a schematic structural diagram of a plugging structure of a dewatering well according to an embodiment of the present invention, and as can be seen from fig. 2, the plugging structure of a dewatering well includes: the dewatering well 20 is arranged in a foundation, and a cushion layer 01, a waterproof layer 02 and a raft foundation layer 03 are sequentially paved above the foundation; pressure release pipeline 11, pressure release pipeline 11 pierces through bed course 01, waterproof layer 02 and raft foundation 03, pressure release pipeline 11 one end with precipitation well 20 is connected, pressure release pipeline 11's the other end stretches out raft foundation 03, pressure release pipeline 11 is used for preventing groundwater from following get into in the pressure release pipeline 11 bed course 01, waterproof layer 02, raft foundation 03.
The plugging structure of the dewatering well is described in detail with reference to fig. 2:
the pressure relief pipeline 11 is preferably a seamless water-stop steel pipe, the pressure relief pipeline 11 may have other structures, and it is only necessary that the pressure relief pipeline 11 can prevent water from entering the cushion layer 01, the waterproof layer 02 and the raft foundation layer 03 from the pressure relief pipeline 11, so as to avoid soaking the cushion layer 01, the waterproof layer 02 and the raft foundation layer 03;
preferably, the inner diameter of the seamless water-stopping steel pipe is smaller than the inner diameter of the dewatering well 20, for example, a pipe with a diameter of 400mm is selected as the dewatering well 20, and a seamless water-stopping steel pipe with a diameter of 150mm is selected as the pressure relief pipe 11, and it should be noted that the diameters of the dewatering well 20 and the seamless water-stopping steel pipe are not limited to the above data, and are only a preferred embodiment of the present invention.
The part of the foundation, which is close to the pressure relief pipeline 11, is sunken downwards to form a groove surrounding the pressure relief pipeline 11, in the embodiment, the outer wall of the dewatering well 20 extends outwards within the range of 300mm, the foundation is sunken downwards by 100mm to form the groove, and the specific data can be adjusted according to actual conditions and specific conditions.
The seamless water-stop steel pipe and the one end that precipitation well 20 is connected with the recess bottom parallel and level, in this embodiment, the degree of depth of recess is 100mm, of course, according to actual conditions and specific demand, the degree of depth of recess can be higher or lower, does not do the only restriction here. The design of recess is favorable to further guaranteeing that groundwater can not follow get into in the seamless stagnant water steel pipe bed course 01, waterproof layer 02, raft foundation 03, the protection bed course 01, waterproof layer 02, raft foundation 03 avoid soaking of secret ponding.
Lay bed course 01, waterproof layer 02, raft foundation layer 03 on the peripheral ground of seamless stagnant water steel pipe in proper order, bed course 01, waterproof layer 02, raft foundation layer 03 with the outer wall zonulae occludens of seamless stagnant water steel pipe, the bed course 01 is laid on the ground, the bed course 01 is located some thickness of seamless stagnant water steel pipe outlying is bigger, with the annular groove agrees with, the waterproof layer 02 is laid on the bed course 01, is close to pressure release pipeline 11 outlying the waterproof layer 02 is towards keeping away from precipitation well 20's direction is in extend in the raft foundation layer to sealed the fixing on pressure release pipeline 11's the outer wall. The raft foundation layer 03 is laid above the waterproof layer 02, and the thickness of the raft foundation layer 03 is 500-700 mm.
Additionally, the position where the seamless water-stop steel pipe is connected with the raft foundation layer 03 is provided with a second water-stop ring 13, the second water-stop ring 13 is located in the raft foundation layer 03, it should be noted that the second water-stop ring 13 is already connected with the seamless water-stop steel pipe before the raft foundation layer 03 is laid, the second water-stop ring 13 is fixedly connected with the seamless water-stop steel pipe, and the fixed connection may be in a manner of pasting, bolting, individual welding, or the like.
The end of the seamless water-stop steel pipe far away from the precipitation well 20 is preferably higher than the upper surface of the raft foundation layer 03, so as to further ensure that groundwater cannot enter the raft foundation layer 03 from the seamless water-stop steel pipe. The end of the seamless water-stop steel pipe far away from the precipitation well 20 can be even with the upper surface of the raft foundation layer 03.
Precipitation well 20 generally is the iron pipe, precipitation well 20 the well head with seamless stagnant water steel pipe connects, precipitation well 20 with seamless stagnant water steel pipe connects through first seal ring 12, the internal diameter more than or equal to of first seal ring 12 the internal diameter of seamless stagnant water steel pipe, the interior border of first seal ring 12 with the one end full weld welding of seamless stagnant water steel pipe, the external diameter of seal ring is greater than precipitation well 20's internal diameter, precipitation well 20 the well head with seal ring's terminal surface full weld is connected, prevents groundwater from precipitation well 20 with the welding department of seamless stagnant water steel pipe gets into the bed course 01.
In the construction process, the upper building is constructed while the ground water level is lowered, and the dewatering well 20 and the seamless water-stopping steel pipe, including the filling material and the water-stopping plate, can be plugged when the buoyancy of the upper building and the ground water is offset.
The dewatering well 20 is filled with a crushed stone particle layer 21, a clay layer 22 and a micro-expansion agent doped anti-permeability concrete layer 23; the gravel particle layer 21 is filled in the bottommost layer in the dewatering well 20, the particle size of the gravel particles is not more than 30mm, clay is filled above the gravel particle layer 21, the thickness of the clay layer 22 is not less than 5m, anti-permeability concrete doped with micro-expansion agent is filled above the clay layer 22, and the anti-permeability concrete layer 23 doped with micro-expansion agent can also be replaced by other water-swelling building materials.
The seamless water-stop steel pipe is internally filled with an impervious concrete layer 24 of a micro-expansion agent, and can be replaced by other building materials which expand when meeting water. The micro-expanding agent is beneficial to blocking the water seepage gap when meeting water and slowing down the water seepage amount. One end of the seamless water-stopping steel pipe, which is far away from the dewatering well 20, is provided with a first water-stopping plate 14, and the first water-stopping plate 14 is used for plugging the pipe orifice of the seamless water-stopping steel pipe.
Additionally, a second water stop plate 15 can be arranged inside the seamless water stop steel pipe, the outer edge of the second water stop plate 15 is fixedly connected with the inner wall of the seamless water stop steel pipe, and the second water stop plate 15 is vertically wrapped by the micro-expansive agent-doped anti-permeability concrete and used for plugging the pressure relief pipeline 11 and plugging the seamless water stop steel pipe.
In this embodiment, the pressure relief pipeline 11, the first water stop ring 12, the second water stop ring 13, the first water stop plate 14, and the second water stop plate 15 may be made of galvanized water stop steel.
This embodiment provides a plugging structure of precipitation well, through setting up pressure release pipeline 11 in the top of precipitation well 20, and set up pressure release pipeline 11 pierces through bed course 01, waterproof layer 02, raft foundation 03, and the shutoff precipitation well 20 with pressure release pipeline 11 makes when the groundwater level rises again, can pass through the precipitation well continues to reduce the groundwater level, and superstructure continues the construction simultaneously, until the superstructure with when the groundwater level independently offsets each other, the shutoff again precipitation well 20 with seamless stagnant water steel pipe compares with traditional precipitation well structure, makes bed course 01, waterproof layer 02, raft foundation 03 can not receive because of the groundwater level rises and soak even by the top bad.
In summary, the plugging structure of dewatering well provided by the utility model comprises: the dewatering well is arranged in a foundation, and a cushion layer, a waterproof layer and a raft foundation layer are laid above the foundation; pressure release pipeline, pressure release pipeline pierces through bed course, waterproof layer and raft foundation layer, pressure release pipeline's one end with the precipitation well is connected, pressure release pipeline's the other end stretches out raft foundation layer, pressure release pipeline is used for preventing water from following get into in the pressure release pipeline bed course, waterproof layer, raft foundation layer. The technical scheme of the utility model solves the problem that the raft foundation layer is damaged after the underground water level rises back in the existing dewatering well plugging structure.
The above description is only for the purpose of describing the preferred embodiments of the present invention, and is not intended to limit the scope of the present invention, and any variations and modifications made by those skilled in the art based on the above disclosure are within the scope of the appended claims.
Claims (9)
1. The utility model provides a plugging structure of precipitation well which characterized in that includes:
the dewatering well is arranged in a foundation, and a cushion layer, a waterproof layer and a raft foundation layer are sequentially paved above the foundation;
pressure release pipeline, pressure release pipeline pierces through bed course, waterproof layer and raft foundation layer, pressure release pipeline's one end with precipitation well connection, pressure release pipeline's the other end stretches out raft foundation layer, pressure release pipeline is used for preventing groundwater from following get into in the pressure release pipeline bed course, waterproof layer, raft foundation layer.
2. The plugging structure of dewatering well as claimed in claim 1, wherein the pressure relief pipeline is connected to the dewatering well through a first water stop ring, an inner edge of the first water stop ring is fixedly connected to one end of the pressure relief pipeline, an inner diameter of the first water stop ring is greater than or equal to an inner diameter of the pressure relief pipeline, an outer diameter of the first water stop ring is greater than an inner diameter of the dewatering well, and the dewatering well is connected to an end face of the first water stop ring near a well head of the pressure relief pipeline.
3. A plugging structure of dewatering well according to claim 2, wherein the part of the foundation near the pressure relief pipeline is recessed downward to form a groove surrounding the pressure relief pipeline, the wellhead of the dewatering well is flush with the bottom of the groove, and the thickness of the part of the cushion layer in the groove is larger than that of the rest part.
4. The plugging structure of dewatering well as defined in claim 1, wherein the outer wall of the pressure relief pipeline is provided with a second water stop ring.
5. A plugging structure for dewatering wells according to claim 4, wherein the water barrier near the periphery of the pressure relief pipeline extends in the raft foundation layer in a direction away from the dewatering well and is sealingly fixed on the outer wall of the pressure relief pipeline.
6. The plugging structure of dewatering well according to claim 1, wherein the other end of the pressure relief pipe is provided with a first water stop plate for sealing the pressure relief pipe.
7. The plugging structure of dewatering well according to claim 1, wherein the dewatering well is sequentially filled with a crushed stone particle layer, a clay layer and a micro-expansive agent-doped anti-permeability concrete layer from one end far away from the pressure relief pipeline to the other end close to the pressure relief pipeline; and the pressure relief pipeline is filled with an anti-permeability concrete layer doped with a micro-expanding agent.
8. The plugging structure of dewatering well as defined in claim 7, wherein a second water stop plate is further installed in the pressure relief pipeline, the edge of the second water stop plate is fixedly connected with the inner wall of the pressure relief pipeline, and the second water stop plate is wrapped up and down by impervious concrete doped with micro-expansion agent for plugging the pressure relief pipeline.
9. The plugging structure of dewatering well according to claim 1, wherein the pressure relief pipeline is made of galvanized water stop steel.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202121311994.0U CN215669620U (en) | 2021-06-11 | 2021-06-11 | Plugging structure of dewatering well |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202121311994.0U CN215669620U (en) | 2021-06-11 | 2021-06-11 | Plugging structure of dewatering well |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113279420A (en) * | 2021-06-11 | 2021-08-20 | 江苏苏南建筑安装工程有限公司 | Plugging structure of dewatering well and construction method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113279420A (en) * | 2021-06-11 | 2021-08-20 | 江苏苏南建筑安装工程有限公司 | Plugging structure of dewatering well and construction method thereof |
| CN113279420B (en) * | 2021-06-11 | 2024-09-20 | 江苏苏南建筑安装工程有限公司 | Plugging structure of dewatering well and construction method thereof |
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