CN109750684B - Multipurpose dewatering well structure and manufacturing method thereof - Google Patents
Multipurpose dewatering well structure and manufacturing method thereof Download PDFInfo
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- CN109750684B CN109750684B CN201910162465.XA CN201910162465A CN109750684B CN 109750684 B CN109750684 B CN 109750684B CN 201910162465 A CN201910162465 A CN 201910162465A CN 109750684 B CN109750684 B CN 109750684B
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- 238000004519 manufacturing process Methods 0.000 title claims description 10
- 239000007787 solid Substances 0.000 claims abstract description 56
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 56
- 239000004927 clay Substances 0.000 claims abstract description 38
- 239000000463 material Substances 0.000 claims abstract description 33
- 238000007789 sealing Methods 0.000 claims abstract description 20
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 13
- 239000010959 steel Substances 0.000 claims abstract description 13
- 238000005086 pumping Methods 0.000 claims description 19
- 238000000034 method Methods 0.000 claims description 8
- 238000004062 sedimentation Methods 0.000 claims description 8
- 238000003466 welding Methods 0.000 claims description 8
- 238000001556 precipitation Methods 0.000 claims description 5
- 239000011148 porous material Substances 0.000 abstract description 3
- 230000009189 diving Effects 0.000 description 5
- 238000005406 washing Methods 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 238000009412 basement excavation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
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- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The invention relates to a multipurpose dewatering well structure, wherein a relief well solid pipe and a relief well filter pipe are cylindrical, have the same diameter and are sequentially connected from top to bottom to form a relief well pipe; the dry well solid pipe and the dry well filter pipe are cylindrical, have the same diameter and are sequentially connected from top to bottom; the connection bodies of the dry well solid pipe and the dry well filter pipe are sleeved outside the relief well solid pipe and fixedly connected with the relief well solid pipe, and an annular space between the relief well solid pipe and the relief well pipe forms a dry well pipe; in the opened well hole, clay is arranged at the periphery of the top of the dry well solid pipe, the bottom of the dry well filter pipe is welded with a sealing steel plate set for sealing the bottom, a layered water-stopping material is arranged at the lower part of the sealing steel plate set, gravel materials are arranged between the clay and the layered water-stopping material, and the gravel materials are also arranged at the lower parts of the layered water-stopping material and the periphery of the pressure-reducing well filter pipe and the pressure-reducing well solid pipe; clay, layered water stop material and gravel material are used for supporting the well hole. The invention can control and extract multiple layers of underground water in a layering manner after the well is formed by one-time pore forming.
Description
Technical Field
The invention relates to a dewatering well, in particular to a multipurpose dewatering well structure and a manufacturing method thereof.
Background
At present, most of diving in dewatering wells is dry well, pressure-bearing water is a relief well, and the diving and pressure-bearing water are respectively carried out dewatering in different time intervals; and the other is that the mixed well is submerged and pressurized water is pumped at the same time. The former method has larger work load of well completion, needs to carry out well completion for multiple times, has longer construction period and higher cost; the latter method has larger precipitation amount, especially has larger influence on the ground subsidence around the pit caused by the precipitation because the pressurized water needs to be pumped in advance.
Disclosure of Invention
The invention aims to provide a multipurpose dewatering well structure, which is formed by one-time pore forming, achieves the functions of dewatering by respectively opening diving and bearing water in different time intervals, and has lower construction cost; the method is particularly suitable for engineering projects with the excavation surface approaching or uncovering the roof of the confined aquifer and the confined water having larger water dropping amplitude.
The invention adopts the following technical scheme:
the utility model provides a multi-purpose dewatering well structure, includes relief well solid pipe 3, the solid pipe of relief well 1, the filter tube of relief well 2, relief well filter tube 4; the relief well solid pipe 3 and the relief well filter pipe 4 are cylindrical, have the same diameter and are sequentially connected from top to bottom to form a relief well pipe; the dry well solid pipe 1 and the dry well filter pipe 2 are cylindrical, have the same diameter and are sequentially connected from top to bottom; the connection bodies of the dry well solid pipe 1 and the dry well filter pipe 2 are sleeved outside the relief well solid pipe 3 and fixedly connected with the relief well solid pipe 3, and an annular space between the relief well solid pipe and the relief well pipe forms a dry well pipe; in the opened well hole, clay 7 is arranged at the periphery of the top of the dry well solid pipe 1, a sealing steel plate group 6 is welded at the bottom of the dry well filter pipe 2 for sealing the bottom, a layered water-stopping material is arranged at the lower part of the sealing steel plate group 6, gravel 8 is arranged between the clay 7 and the layered water-stopping material, and the gravel 8 is also arranged at the lower parts of the layered water-stopping material and the periphery of the pressure-reducing well filter pipe 4 and the pressure-reducing well solid pipe 3; clay 7, layered water stop material and gravel 8 prop up the well.
Furthermore, the lower end of the relief well filter tube 4 is also connected with a sedimentation tube 5 with the same diameter, and the gravel material 8 is also arranged around the sedimentation tube 5.
Further, the layered water-stopping material is water-stopping clay 9.
Further, a water pump 10 is arranged in the relief well filter tube 4, the water pump 10 is connected with a pump tube 11, and the pump tube 11 extends out of the relief well solid tube 3 upwards.
Further, the solid drain well pipe 1 and the filter drain well pipe 2 extend into the air inlet pipe 14 and the water outlet pipe 13 from top to bottom, the air inlet pipe 14 is connected with an external fan, the water outlet pipe 13 is connected with the vacuum pipe 12, and the vacuum pipe 12 is connected with an external negative pressure providing device.
Further, the vacuum pipe 12 is also directly communicated with the drain well solid pipe 1.
The manufacturing method of the multipurpose dewatering well structure comprises the following steps: s1, a drain well solid pipe 1 and a drain well filter pipe 2 are welded in sequence according to the design length to form an outer layer of drain well pipe; the pipe diameter of the drain well pipe is more than 50mm greater than that of the relief well pipe; s2, sequentially welding the relief well solid pipe 3, the relief well filter pipe 4 and the sedimentation pipe 5 according to the designed length to form an inner-layer relief well pipe; s3, fixing the outer layer of the drain well pipe and the inner layer of the relief well pipe every 2-3m, welding a sealing steel plate group 6 at the bottom of the drain well filter pipe 2 for sealing the bottom, and assembling and welding to complete the whole multipurpose well pipe structure; s4, forming holes and clearing the holes, wherein the aperture is more than 100mm larger than the diameter of the outer layer of the drain well pipe, and putting down the multipurpose well pipe structure after the hole clearing is completed; s5, filling gravel materials 8 according to the designed depth, and filling water-stopping clay 9 with the length of more than 4m after filling the gravel materials 8 in the position higher than the relief well filter tube 4; sequentially filling gravel 8 and clay 7 until reaching the ground surface; and S6, respectively installing pumping equipment on the drainage well pipe and the relief well pipe, and respectively starting the pumping equipment according to the requirement to perform pumping operation.
Further, in step S5, the gravel and clay are placed in stages, and when the gravel 8 and clay 7 in one stage are completely compacted, the gravel and clay in the next stage can be filled.
Further, vacuum is sealed between the inner layer well pipe and the outer layer well pipe, and vacuum pumping is adopted; or the dry well is made to form a vacuum environment, water in the submerged aquifer is pumped by an air compressor or a small water pump with small caliber, and water in the confined aquifer is pumped by placing a water pump 10 in a relief well pipe of the inner layer, so that water is pumped from one well in a layered manner.
Still further, install air inlet tuber pipe 14 and outlet pipe 13 in the drain well filter tube 2, air inlet tuber pipe 14 is connected with external fan, and outlet pipe 13 is connected with external vacuum pump.
The invention is implemented by: the method comprises the steps of arranging a double-layer well pipe and a filter pipe in a dewatering well, arranging a relief well structure on an inner layer, arranging a drainage well structure on an outer layer, filling sand and water-stopping clay between the two layers of well pipes according to the position of a water-bearing layer, arranging a grouting pipe in the middle of the water-stopping part, and arranging 2 grouting pipes on two sides of a well wall after the clay is backfilled to half of the designed thickness, wherein the grouting pipes are symmetrically arranged. The bottom of the grouting pipe is positioned at the half of the clay backfill thickness, and the top of the grouting pipe reaches the elevation surface of the clay backfill top. The clay water-stopping layer needs to have a certain thickness and strength. The water in the immersed aquifer is pumped between the two layers of well pipes through the same equipment of the air compressor well washing or a water pump with small caliber, and the water pump is placed in the inner layer of well pipe to pump the water in the confined aquifer, so that the purpose of pumping water from one well in different layers is achieved. The shallow layer draining diving can be sealed and vacuumized, vacuum pumping is adopted, or a vacuum environment is formed in the draining well, and water in the diving aquifer is pumped by using equipment such as an air compressor well washing device or a water pump with small discharge caliber.
The beneficial effects of the invention are as follows:
1) Multiple layers of underground water can be extracted in a layering control mode after one-time pore forming and well formation.
2) The reliability is high; the design is ingenious.
Drawings
FIG. 1 is a schematic view of the structure of the multi-purpose dewatering well of the present invention.
Fig. 2 is a cross-sectional view A-A' of fig. 1.
FIG. 3 is a cross-sectional view of B-B' in FIG. 1.
Fig. 4 is a cross-sectional view of C-C' in fig. 1.
Fig. 5 is a sectional view of D-D' in fig. 1.
Fig. 6 is a partial enlarged view of fig. 1.
Fig. 7 is another embodiment of the present invention: a multi-filter-head structure is adopted to drain the well schematic diagram.
FIG. 8 is a schematic diagram of the manufacturing process of the multi-purpose dewatering well structure of the present invention.
In the figure, 1, a dry well solid pipe, 2, a dry well filter pipe, 3, a relief well solid pipe, 4, a relief well filter pipe, 5, a sedimentation pipe, 6, a sealing steel plate 7, clay, 8, gravel material, 9, water-stopping clay, 10, a water pump, 11, a pump pipe, 12, a vacuum pipe, 13, a water outlet pipe and 14, an air inlet pipe.
Detailed Description
The invention will be further described with reference to the drawings and specific examples.
Referring to fig. 1-8, a multipurpose dewatering well structure comprises a relief well solid pipe 3, a drainage well solid pipe 1, a drainage well filter pipe 2 and a relief well filter pipe 4; the relief well solid pipe 3 and the relief well filter pipe 4 are cylindrical, have the same diameter and are sequentially connected from top to bottom to form a relief well pipe; the dry well solid pipe 1 and the dry well filter pipe 2 are cylindrical, have the same diameter and are sequentially connected from top to bottom; the connection bodies of the dry well solid pipe 1 and the dry well filter pipe 2 are sleeved outside the relief well solid pipe 3 and fixedly connected with the relief well solid pipe 3, and an annular space between the relief well solid pipe and the relief well pipe forms a dry well pipe; in the opened well hole, clay 7 is arranged at the periphery of the top of the dry well solid pipe 1, a sealing steel plate group 6 is welded at the bottom of the dry well filter pipe 2 for sealing the bottom, a layered water-stopping material is arranged at the lower part of the sealing steel plate group 6, gravel 8 is arranged between the clay 7 and the layered water-stopping material, and the gravel 8 is also arranged at the lower parts of the layered water-stopping material and the periphery of the pressure-reducing well filter pipe 4 and the pressure-reducing well solid pipe 3; clay 7, layered water stop material and gravel 8 prop up the well.
In this embodiment, referring to fig. 1, the lower end of the relief well filter tube 4 is further connected to a settling tube 5 of equal diameter, and the gravel 8 is also provided around the settling tube 5.
Referring to fig. 1 and 7, the layered water-stopping material is water-stopping clay 9.
Referring to fig. 1, a water pump 10 is arranged in the relief well filter tube 4, the water pump 10 is connected with a pump tube 11, and the pump tube 11 extends upwards out of the relief well solid tube 3.
Referring to fig. 1 and 6, the solid drain pipe 1 and the filter pipe 2 extend into the air inlet pipe 14 and the water outlet pipe 13 from top to bottom, the air inlet pipe 14 is connected with an external fan, the water outlet pipe 13 is connected with the vacuum pipe 12, and the vacuum pipe 12 is connected with an external negative pressure providing device.
Referring to fig. 1 and 6, the vacuum pipe 12 is also in direct communication with the drain well solid pipe 1.
See fig. 8 for details: the manufacturing of the multipurpose precipitation well structure comprises the following steps:
(1) the dry well solid pipe 1 and the dry well filter pipe 2 are welded in sequence according to the design length to form an outer layer dry well pipe; in order to ensure the pumping effect, the diameter of the dry well is larger than that of the relief well by more than 50 mm.
(2) The relief well solid pipe 3, the relief well filter pipe 4 and the sedimentation pipe 5 are welded in sequence according to the designed length to form an inner layer drainage well pipe;
(3) fixing the outer layer of the drain well pipe and the inner layer of the relief well pipe every 2-3m, welding a sealing steel plate group 6 on the bottom of the drain well filter pipe 2 for sealing the bottom, and assembling and welding to complete the whole multipurpose well pipe structure;
(4) and (5) forming holes and cleaning the holes. The aperture is more than 100mm larger than the diameter of the outer layer well pipe. Discharging the well pipe after hole cleaning is completed;
(5) filling the gravel material 8 according to the designed depth, and filling the water-stopping clay 9 with the size of more than 4m after the gravel material 8 is filled; then sequentially filling the gravel material 8 and the clay 7 until reaching the ground surface. The gravel is filled by standing in segments, and the next segment of gravel (or clay) filling can be carried out when the gravel (or clay) is completely compacted.
(6) And installing water pumping equipment, and respectively starting the water pumping equipment to pump water according to the requirements. The two layers of well pipes can be sealed and vacuumized, and water in the submerged aquifer is pumped by adopting vacuum pumping or forming a vacuum environment in a dry well, and water in the submerged aquifer is pumped by using equipment such as an air compressor for well washing or a water pump with small caliber. The water pump is placed in the inner-layer pipe well to pump the water in the confined aquifer, so that the aim of pumping water from one well in different layers is fulfilled.
Fig. 7 shows another embodiment of the present invention: and a multi-filter-head structure is adopted for dredging the well, and a dredging well filter pipe 2 and a dredging well solid pipe 1 are arranged at intervals.
Likewise, for a multilayer aquifer, three or more layers of similar structure well pipes are adopted, layered clay balls are pressurized with slurry to stop water, filters are embedded in layers, and the layers are observed, pumped or recharged.
For multi-layer soil layers, rock layers and the like, multi-layer similar structure well pipes are adopted, the shape is not limited to a circle, the material is not limited to a steel pipe, the layered water stopping material and the manner are not limited to clay ball pressurized slurry water stopping, a plurality of filters are embedded in layers, and the multi-layer observation, the layered water pumping or the layered recharging and the like can be performed simultaneously or can be performed step by step according to a plan. Similarly, the purpose of one well for multiple purposes can be achieved.
The foregoing is a preferred embodiment of the present invention, and various changes and modifications may be made therein by those skilled in the art without departing from the general inventive concept, and such changes and modifications should be considered as falling within the scope of the claimed invention.
Claims (6)
1. The utility model provides a multi-purpose precipitation well structure which characterized in that:
comprises a relief well solid pipe (3), a drain well solid pipe (1), a drain well filter pipe (2) and a relief well filter pipe (4);
the relief well solid pipe (3) and the relief well filter pipe (4) are cylindrical, have the same diameter and are sequentially connected from top to bottom to form a relief well pipe;
the dry well solid pipe (1) and the dry well filter pipe (2) are cylindrical, have the same diameter and are sequentially connected from top to bottom; the connection bodies of the dry well solid pipe (1) and the dry well filter pipe (2) are sleeved outside the relief well solid pipe (3), are fixedly connected with the relief well solid pipe (3), and form a dry well pipe with an annular space between the relief well solid pipe and the relief well pipe;
in the opened well hole, clay (7) is arranged at the periphery of the top of the dry well solid pipe (1), a sealing steel plate group (6) is welded at the bottom of the dry well filter pipe (2) for sealing the bottom, a layered water-stopping material is arranged at the lower part of the sealing steel plate group (6), gravel (8) is arranged between the clay (7) and the layered water-stopping material, and the gravel (8) is also arranged at the lower part of the layered water-stopping material and around the pressure-reducing well filter pipe (4) and the pressure-reducing well solid pipe (3);
clay (7), layered water-stopping materials and gravel materials (8) are used for supporting the well holes;
the lower end of the relief well filter tube (4) is also connected with a sedimentation tube (5) with the same diameter, and the gravel material (8) is also arranged around the sedimentation tube (5);
the layered water-stopping material is water-stopping clay (9);
a water pump (10) is arranged in the relief well filter tube (4), the water pump (10) is connected with a pump tube (11), and the pump tube (11) extends upwards out of the relief well solid tube (3);
the utility model discloses a vacuum pump, including the solid pipe of drain well (1) and drain well filter tube (2), top-down stretches into air inlet tuber pipe (14), outlet pipe (13), and air inlet tuber pipe (14) are connected outside fan, and outlet pipe (13) are connected with vacuum tube (12), and vacuum tube (12) are connected with the outside device that provides negative pressure.
2. The multipurpose precipitation well structure of claim 1, wherein: the vacuum tube (12) is also directly communicated with the drain well solid tube (1).
3. A method for manufacturing a multi-purpose dewatering well structure according to claim 1, comprising the steps of:
s1, a drain well solid pipe (1) and a drain well filter pipe (2) are welded in sequence according to the designed length to form an outer layer of drain well pipe; the pipe diameter of the drain well pipe is more than 50mm greater than that of the relief well pipe;
s2, sequentially welding a relief well solid pipe (3), a relief well filter pipe (4) and a sedimentation pipe (5) according to the design length to form an inner-layer relief well pipe;
s3, fixing the outer layer of the drain well pipe and the inner layer of the relief well pipe every 2-3m, welding a sealing steel plate set (6) at the bottom of the drain well filter pipe (2) for sealing the bottom, and assembling and welding to complete the whole multipurpose well pipe structure;
s4, forming holes and clearing the holes, wherein the aperture is more than 100mm larger than the diameter of the outer layer of the drain well pipe, and putting down the multipurpose well pipe structure after the hole clearing is completed;
s5, filling gravel (8) according to the designed depth, and filling water-stopping clay (9) with the size of more than 4m after filling the gravel (8) into a part higher than the pressure reducing well filter tube (4); sequentially filling gravel (8) and clay (7) until reaching the ground surface;
and S6, respectively installing pumping equipment on the drainage well pipe and the relief well pipe, and respectively starting the pumping equipment according to the requirement to perform pumping operation.
4. A method for manufacturing a multi-purpose dewatering well structure according to claim 3, wherein: in step S5, the gravel and clay are placed in segments, and when the gravel (8) and clay (7) of one segment are completely compacted, the gravel and clay of the next segment can be filled.
5. A method for manufacturing a multi-purpose dewatering well structure according to claim 3, wherein: sealing and vacuumizing between the inner well pipe and the outer well pipe, and pumping water by adopting vacuum; or the dry well is made to form a vacuum environment, the air compressor or a small water pump with small caliber is used for pumping water in the submerged aquifer, and a water pump (10) is arranged in a relief well pipe of the inner layer for pumping water in the confined aquifer, so that water pumping is performed in a layered manner from one well.
6. The method for manufacturing the multi-purpose dewatering well structure according to claim 4, wherein: an air inlet pipe (14) and an outlet pipe (13) are arranged in the drainage well filter pipe (2), the air inlet pipe (14) is connected with an external fan, and the outlet pipe (13) is connected with an external vacuum pump.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910162465.XA CN109750684B (en) | 2019-03-05 | 2019-03-05 | Multipurpose dewatering well structure and manufacturing method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910162465.XA CN109750684B (en) | 2019-03-05 | 2019-03-05 | Multipurpose dewatering well structure and manufacturing method thereof |
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| CN109750684B true CN109750684B (en) | 2024-03-26 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112983428B (en) * | 2021-02-20 | 2023-03-14 | 上海市政工程设计研究总院（集团）有限公司 | Method for building underground water environment monitoring well |
| CN115305901B (en) * | 2022-08-16 | 2024-05-28 | 中交第四公路工程局有限公司 | Directional recharging and emergency pumping well |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102518141A (en) * | 2011-12-19 | 2012-06-27 | 同济大学 | Deep foundation pit dewatering and decompressing combination well controlled in subsection manner |
| JP2012241383A (en) * | 2011-05-18 | 2012-12-10 | Penta Ocean Construction Co Ltd | Ground improvement method and decompression container |
| CN202809629U (en) * | 2012-08-29 | 2013-03-20 | 上海长凯岩土工程有限公司 | Pressure-reduction and dewatering supplementary well completion structure in disturbance stratum inside foundation pit |
| CN107489159A (en) * | 2017-08-03 | 2017-12-19 | 中国电建集团铁路建设有限公司 | Deep ＆ thick silt matter Soft Soil Layer vacuum tube well dewatering construction structure and its construction |
| CN210140838U (en) * | 2019-03-05 | 2020-03-13 | 上海长凯岩土工程有限公司 | Multi-purpose precipitation well structure |
-
2019
- 2019-03-05 CN CN201910162465.XA patent/CN109750684B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012241383A (en) * | 2011-05-18 | 2012-12-10 | Penta Ocean Construction Co Ltd | Ground improvement method and decompression container |
| CN102518141A (en) * | 2011-12-19 | 2012-06-27 | 同济大学 | Deep foundation pit dewatering and decompressing combination well controlled in subsection manner |
| CN202809629U (en) * | 2012-08-29 | 2013-03-20 | 上海长凯岩土工程有限公司 | Pressure-reduction and dewatering supplementary well completion structure in disturbance stratum inside foundation pit |
| CN107489159A (en) * | 2017-08-03 | 2017-12-19 | 中国电建集团铁路建设有限公司 | Deep ＆ thick silt matter Soft Soil Layer vacuum tube well dewatering construction structure and its construction |
| CN210140838U (en) * | 2019-03-05 | 2020-03-13 | 上海长凯岩土工程有限公司 | Multi-purpose precipitation well structure |
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