CN113174985A - Pipe well seepage-proofing and well-sealing treatment method for ultra-deep underground structure bottom plate - Google Patents
Pipe well seepage-proofing and well-sealing treatment method for ultra-deep underground structure bottom plate Download PDFInfo
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- CN113174985A CN113174985A CN202110463706.1A CN202110463706A CN113174985A CN 113174985 A CN113174985 A CN 113174985A CN 202110463706 A CN202110463706 A CN 202110463706A CN 113174985 A CN113174985 A CN 113174985A
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- 238000000034 method Methods 0.000 title claims abstract description 80
- 238000007789 sealing Methods 0.000 title claims abstract description 65
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 77
- 238000010276 construction Methods 0.000 claims abstract description 23
- 238000005086 pumping Methods 0.000 claims abstract description 22
- 230000002265 prevention Effects 0.000 claims abstract description 16
- 238000009412 basement excavation Methods 0.000 claims abstract description 5
- 238000005520 cutting process Methods 0.000 claims abstract description 5
- 229910000831 Steel Inorganic materials 0.000 claims description 23
- 239000010959 steel Substances 0.000 claims description 23
- 238000003466 welding Methods 0.000 claims description 5
- 239000012466 permeate Substances 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 2
- 238000005553 drilling Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 7
- 238000001556 precipitation Methods 0.000 description 3
- 101150054854 POU1F1 gene Proteins 0.000 description 2
- 230000002940 repellent Effects 0.000 description 2
- 239000005871 repellent Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D19/00—Keeping dry foundation sites or other areas in the ground
- E02D19/22—Lining sumps in trenches or other foundation pits
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D19/00—Keeping dry foundation sites or other areas in the ground
- E02D19/06—Restraining of underground water
- E02D19/10—Restraining of underground water by lowering level of ground water
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D19/00—Keeping dry foundation sites or other areas in the ground
- E02D19/06—Restraining of underground water
- E02D19/12—Restraining of underground water by damming or interrupting the passage of underground water
- E02D19/16—Restraining of underground water by damming or interrupting the passage of underground water by placing or applying sealing substances
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/045—Underground structures, e.g. tunnels or galleries, built in the open air or by methods involving disturbance of the ground surface all along the location line; Methods of making them
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
- E02D31/02—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against ground humidity or ground water
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Abstract
The invention discloses a pipe well seepage prevention and well sealing treatment method, particularly discloses a pipe well seepage prevention and well sealing treatment method for an ultra-deep underground structure bottom plate, and belongs to the technical field of construction engineering construction processes. The pipe well seepage-proofing and well-sealing treatment method for the ultra-deep underground structure bottom plate is good in node waterproof treatment effect and relatively low in construction cost. The method for treating the seepage prevention and the well sealing of the pipe well comprises the steps of firstly, downwards arranging a water seepage filter pipe well in an excavation foundation pit, then pumping and draining seepage water in the water seepage filter pipe well by using a submersible pump, then, taking out the submersible pump before well sealing, replacing the submersible pump with a horizontal drainage device, sealing a well mouth, then continuously pumping water, cutting off a water inlet pipe of the sealed horizontal drainage device after the construction of an ultra-deep underground structure bottom plate is completed, filling a process pit, and finally pouring a bottom plate above the process pit to complete the seepage prevention and the well sealing of the pipe well.
Description
Technical Field
The invention relates to a pipe well seepage prevention and well sealing treatment method, in particular to a pipe well seepage prevention and well sealing treatment method for an ultra-deep underground structure bottom plate, and belongs to the technical field of construction processes of constructional engineering.
Background
With the rapid development of economic society and the progress of building technology in China, the demand on underground space is larger and larger, and large-span, ultra-depth and ultra-deep underground structures are more and more, so that complex hydrogeological conditions are faced, more and more pipe wells are adopted in a foundation pit for dewatering, the later-stage leakage condition is serious due to the fact that effective waterproof node treatment is not adopted in the traditional method, and the cost is greatly increased due to the fact that a well sealing method that a submersible pump is not taken out is adopted.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the pipe well seepage-proofing and well-sealing treatment method for the ultra-deep underground structure bottom plate is good in node waterproof treatment effect and relatively low in construction cost.
The technical scheme adopted for solving the technical problems is as follows: a method for preventing leakage and sealing of pipe well for the ultra-deep underground structure bottom plate includes such steps as digging a foundation pit, laying a filtered water pipe well, pumping the water in said filtered water pipe well, replacing it with horizontal drainage unit, sealing the well mouth, pumping water, cutting off the water inlet pipe of horizontal drainage unit, filling technological pit, and pouring bottom plate.
The water seepage filtering pipe well comprises a well point pipe and a supporting well pipe, wherein the well point pipe is arranged at the middle lower part of the deep drilled well, the supporting well pipe and the well point pipe are tightly propped against the upper part of the deep drilled well, and underground water permeates into the pipe well through the well point pipe.
The preferable mode of the scheme is that the top of the deep drilling well is also provided with a process pit which is in a reversed prism shape with a large upper part and a small lower part.
Further, the ultra-deep underground structure bottom plate from top to bottom include concrete bottom plate body, bottom plate waterproof layer and bottom plate bed course in proper order.
The preferable mode of the scheme is that when the submersible pump is taken out and replaced by the horizontal drainage device for pumping water, the pipe orifice sealing plate is arranged at the top end of the supporting well pipe, then the water inlet pipe of the horizontal drainage device penetrates through the pipe orifice sealing plate to be inserted into the bottom of the water seepage filter pipe well, and the water inlet pipe is connected with the pipe orifice sealing plate in a welding mode.
Furthermore, when the process pit is filled, the water inlet pipe of the horizontal drainage device is cut off, the cut water inlet pipe is exposed out of the bottom plate of the process pit, the height of the bottom plate is not lower than the thickness of the bottom plate cushion layer, the pipe opening is sealed, and finally the process pit is filled.
The preferable mode of the scheme is that when the process pit is filled, the process pit is filled according to the following steps of firstly paving a pit cushion layer with the thickness being matched with that of the bottom plate cushion layer in the pit, then paving a pit waterproof layer on the pit and the water inlet pipe exposed out of the pit cushion layer, and finally pouring the inverted frustum-shaped pit lining plate to finish the filling work of the process pit.
Furthermore, a stop valve is connected in series on the water inlet pipe exposed out of the pit cushion layer, and the cut water inlet pipe is sealed through the stop valve.
The preferable mode of the scheme is that when the concrete bottom plate body at the position of the process pit is poured, the water stop steel plate extending out of the existing concrete bottom plate body is arranged in the side wall of the existing concrete bottom plate body along the circumferential direction, and then the concrete bottom plate body at the position of the process pit is poured.
Furthermore, the concrete bottom plate body at the position of the process pit is formed by pouring the micro-expansion impervious concrete with a grade higher than that of the existing concrete bottom plate body.
The invention has the beneficial effects that: according to the pipe well seepage prevention and well sealing treatment method, the water seepage filter pipe well is arranged downwards in the excavation foundation pit, then the water seepage in the water seepage filter pipe well is pumped and drained by the submersible pump, then the submersible pump is taken out and replaced by the horizontal drainage device before well sealing, the well mouth is sealed, water pumping is continued, the water inlet pipe of the sealed horizontal drainage device is cut off and the process pit is filled after the construction of the ultra-deep underground structure bottom plate is completed, and finally the bottom plate above the process pit is poured to complete the pipe well seepage prevention and well sealing work. Therefore, the submersible pump does not need to be directly buried in the downcomer well, so that the problem that too many submersible pumps are buried in the downcomer well during large-area construction to achieve the purpose of reducing the construction cost can be effectively solved; simultaneously, because this application has changed among the prior art and has not adopted waterproof nodal processing and lead to the serious problem of later stage seepage condition, and then reach the purpose that improves node water repellent treatment effect.
Drawings
FIG. 1 is a schematic layout view of the pipe well seepage prevention and well sealing treatment method for the ultra-deep underground structural bottom plate when a submersible pump is used for dewatering;
FIG. 2 is a schematic layout view of the pipe well anti-seepage and well sealing treatment method for the ultra-deep underground structural bottom plate when the horizontal drainage device is in precipitation state;
FIG. 3 is a schematic diagram of the sealed dewatering well used in the pipe well seepage prevention and well sealing treatment method of the ultra-deep underground structure bottom plate.
Labeled as: the method comprises the following steps of excavating a foundation pit 1, a water seepage filter pipe well 2, a submersible pump 3, a horizontal drainage device 4, a well point pipe 5, a support well pipe 6, a process pit 7, an ultra-deep underground structure bottom plate 8, a concrete bottom plate body 9, a reversed frustum-shaped pit lining plate 10, a bottom plate waterproof layer 11, a bottom plate cushion layer 12, a pipe orifice sealing plate 13, a pit cushion layer 14, a pit waterproof layer 15, a stop valve 16 and a water stop steel ring 17.
Detailed Description
As shown in fig. 1, 2 and 3, the pipe well anti-seepage and well sealing treatment method for the ultra-deep underground structure bottom plate provided by the invention has the advantages of good joint waterproof treatment effect and relatively low construction cost. The method for treating the pipe well seepage prevention and well sealing comprises the steps of firstly, downwards arranging a water seepage filter pipe well 2 in an excavation foundation pit 1, then, pumping out seepage water in the water seepage filter pipe well 2 by using a submersible pump 3, then, taking out the submersible pump 3 before well sealing, replacing the submersible pump with a horizontal drainage device 4, closing a well mouth, continuously pumping water, cutting off a water inlet pipe of the closed horizontal drainage device 4 after the construction of an ultra-deep underground structure bottom plate is completed, filling a process pit, and finally, pouring a bottom plate above the process pit to complete the pipe well seepage prevention and well sealing work. According to the pipe well seepage prevention and well sealing treatment method, the seepage filter pipe well is arranged downwards in the excavation foundation pit, then the submersible pump is used for pumping and discharging seepage water in the seepage filter pipe well and is timely replaced by the horizontal drainage device along with the engineering progress, then the seepage water input end with the horizontal drainage device is embedded into a sealed well mouth in the seepage filter pipe well and pumps and discharges residual seepage water, then the water inlet pipe of the sealed horizontal drainage device is cut off, a process pit is filled, and finally a bottom plate is poured to complete the pipe well seepage prevention and well sealing treatment work. Therefore, the submersible pump does not need to be directly buried in the downcomer well, so that the problem that too many submersible pumps are buried in the downcomer well during large-area construction to achieve the purpose of reducing the construction cost can be effectively solved; simultaneously, because this application has changed among the prior art and has not adopted waterproof nodal processing and lead to the serious problem of later stage seepage condition, and then reach the purpose that improves node water repellent treatment effect.
In the above embodiment, in order to ensure the treatment effect of the waterproof node, improve the accessibility of construction and facilitate the discharge of seepage water, the process pit 7 is further arranged at the top of the pit, and the process pit 7 is in a shape of an inverted prism with a large upper part and a small lower part. The water seepage filter pipe well 2 comprises a well point pipe 5 and a supporting well pipe 6, wherein the well point pipe 5 is arranged on the middle lower part of a well pit, the supporting well pipe 6 and the well point pipe 5 are tightly propped on the middle upper part of the well pit, and underground water permeates into the pipe well through the well point pipe 5. When the submersible pump 3 is taken out and replaced by the horizontal drainage device 4 for pumping water, the pipe orifice sealing plate 13 is arranged at the top end of the support well pipe 6, then the water inlet pipe of the horizontal drainage device 4 penetrates through the pipe orifice sealing plate 13 to be inserted into the bottom of the water seepage filter pipe well 2, and the water inlet pipe is connected with the pipe orifice sealing plate 13 through welding. When the process pit 7 is filled, the water inlet pipe of the horizontal drainage device 4 is cut off, the cut water inlet pipe is exposed out of the bottom plate of the process pit 7 by the height which is not lower than the thickness of the bottom plate cushion layer 12, then the pipe opening is sealed, and finally the process pit 7 is filled. Meanwhile, in order to improve the waterproof effect of the bottom plate after the construction of the ultra-deep underground structure bottom plate is completed, a stop valve 16 is also connected in series on the water inlet pipe exposed out of the pit cushion layer 14, and the cut water inlet pipe is sealed through the stop valve 16.
And then combining the characteristics that the ultra-deep underground structure bottom plate 8 sequentially comprises a concrete bottom plate body 9, a bottom plate waterproof layer 11 and a bottom plate cushion layer 12 from top to bottom, when the process pit 7 is filled, the method is carried out according to the following steps of firstly laying a pit cushion layer 14 with the thickness being matched with that of the bottom plate cushion layer 12 in the pit, then laying a pit waterproof layer 15 on the pit and the water inlet pipe exposed out of the pit cushion layer 14, and finally pouring an inverted frustum-shaped pit lining plate 10 to finish the filling work of the process pit. When the concrete bottom plate body 9 at the position of the process pit is poured, the water stop steel plate 17 extending out of the existing concrete bottom plate body 9 is arranged in the side wall of the existing concrete bottom plate body 9 along the circumferential direction, and then the concrete bottom plate body 9 at the position of the process pit is poured. The concrete bottom plate body 9 at the position of the process pit is formed by pouring higher-grade micro-expansion impervious concrete than the existing concrete bottom plate body 9.
In conclusion, the method for treating the foundation of the ultra-deep underground structure bottom plate by adopting the pipe well seepage-proofing and well-sealing treatment method has the following advantages that the concrete lining plate is additionally arranged at the pipe well part, the pipe well sealing valve and the sealing end of the pumping steel pipe are arranged in the lining plate, the water-stopping steel plate is arranged at the structural plate part, and the like, so that the later-stage leakage hidden danger is effectively solved; meanwhile, the submersible pump adopted during pumping is taken out at the well sealing stage and is changed into an external horizontal pump, so that the submersible pump can be recycled, the waste caused by the fact that the submersible pump is sealed in a pipe well in the traditional method can not be taken out is avoided, and the cost is effectively reduced.
Example one
The invention aims to: the method for treating the precipitation anti-seepage node of the ultra-deep underground structure bottom plate pipe well and sealing the well is provided, and aims to solve the problems that in the existing construction, the waterproof node is not treated in place, so that later-stage leakage is caused, and the sealing method is not economical, so that a submersible pump cannot be taken out of the well, and the cost is increased.
The technical scheme of the invention is as follows:
the method comprises the following steps: designing a pipe well, determining well pipe materials, wherein the upper part of the pipe well adopts a DN300 steel pipe, the length is not less than 1.5m, the height of the top of the pipe is 35cm below a structural bottom plate, and a concrete well point pipe is adopted at the position below a steel pipe well point pipe; performing pipe well construction, and after the gravel is backfilled at the periphery of a well pipe, putting a submersible pump and a hose into the pipe well to begin precipitation;
step two: reserving a 1.5m multiplied by 1.5m for a structural bottom plate around the pipe well, and arranging a water stop steel plate with the width of 30cm and the thickness of 3mm at a construction joint; arranging a chamfered platform-shaped lining plate with the thickness of 40cm at the lower part of the reserved structure bottom plate, making slopes around the lining plate, and performing cushion layer construction, waterproof layer construction and structure bottom plate and upper structure construction;
step three: designing, preparing and manufacturing well sealing parts, mainly comprising a horizontal water pump and a valve; pumping water through DN100 steel pipe, and penetrating into a pipe well to be not less than 2 m; the steel pipe well sealing steel plate has the diameter of the inner diameter of a steel pipe well point pipe and the thickness of 3 mm; the diameter of the pumping steel pipe sealing steel plate is the inner diameter of the pumping steel pipe, and the thickness of the pumping steel pipe sealing steel plate is 3 mm. The pumping steel pipe penetrates through the sealing steel plate from the middle and is welded at a designed position; the valve is connected with the water pumping pipe and is fixed at the position of 10cm above the sealing steel plate;
step four: after the submersible pump is taken out of the pipe well, all parts for well sealing are connected, and water pumping operation is started; after the water level is lowered, welding the sealing steel plate with the end part of the pipe diameter of the steel pipe;
step five: closing the valve, cutting an upper drainage pipe at a position 10cm above the valve, welding a sealing pipe, and moving the horizontal water pump to the next pipe well to seal the well;
step six: pouring lining plate concrete by using quick-setting concrete, and integrally wrapping the sealed end;
step seven: and (5) adopting a high-grade micro-expansion impervious concrete pouring structure to reserve a bottom plate to finish construction.
Claims (10)
1. A pipe well seepage-proofing and well-sealing treatment method for an ultra-deep underground structure bottom plate is characterized by comprising the following steps: the method for treating the seepage prevention and the well sealing of the pipe well comprises the steps of firstly, downwards arranging a water seepage filter pipe well (2) in an excavation foundation pit (1), then, pumping and discharging seepage water in the water seepage filter pipe well (2) by using a submersible pump (3), then, taking out the submersible pump (3) before well sealing, replacing the submersible pump with a horizontal drainage device (4), closing a well mouth, continuously pumping water, cutting off a water inlet pipe of the closed horizontal drainage device (4) after the construction of an ultra-deep underground structure bottom plate is completed, filling a process pit, and finally pouring a bottom plate above the process pit to complete the seepage prevention and the well sealing of the pipe well.
2. The pipe well seepage-proofing and well-sealing treatment method for the ultra-deep underground structure bottom plate according to claim 1, characterized in that: the water seepage filter pipe well (2) comprises a well point pipe (5) and a supporting well pipe (6), the well point pipe (5) is arranged on the middle lower part of the deep well, the supporting well pipe (6) and the well point pipe (5) are tightly arranged on the upper part of the deep well, and underground water permeates into the well through the well point pipe (5).
3. The pipe well seepage-proofing and well-sealing treatment method for the ultra-deep underground structure bottom plate according to claim 2, characterized in that: the top of the deep drilling well is also provided with a process pit (7), and the process pit (7) is in a reversed prism shape with a large upper part and a small lower part.
4. The pipe well seepage-proofing and well-sealing treatment method for the ultra-deep underground structure bottom plate according to claim 1, 2 or 3, characterized in that: the ultra-deep underground structure bottom plate (8) sequentially comprises a concrete bottom plate body (9), a bottom plate waterproof layer (11) and a bottom plate cushion layer (12) from top to bottom.
5. The pipe well seepage-proofing and well-sealing treatment method for the ultra-deep underground structure bottom plate according to claim 4, characterized in that: when the submersible pump (3) is taken out and replaced by a horizontal drainage device (4) for pumping water, a pipe orifice sealing plate (13) is arranged at the top end of a supporting well pipe (6), then a water inlet pipe of the horizontal drainage device (4) penetrates through the pipe orifice sealing plate (13) to be inserted into the bottom of the water seepage filter pipe well (2), and the water inlet pipe is connected with the pipe orifice sealing plate (13) in a welding mode.
6. The pipe well seepage-proofing and well-sealing treatment method for the ultra-deep underground structure bottom plate according to claim 5, characterized in that: when the process pit (7) is filled, the water inlet pipe of the horizontal drainage device (4) is cut off, the cut water inlet pipe is exposed out of the bottom plate of the process pit (7) by the height which is not lower than the thickness of the bottom plate cushion layer (12), then the pipe opening is sealed, and finally the process pit (7) is filled.
7. The pipe well seepage-proofing and well-sealing treatment method for the ultra-deep underground structure bottom plate according to claim 6, characterized in that: when the process pit (7) is filled, a pit cushion layer (14) with the thickness matched with that of the bottom plate cushion layer (12) is paved in the pit, then a pit waterproof layer (15) is paved on the pit and the water inlet pipe exposed out of the pit cushion layer (14), and finally an inverted frustum-shaped pit lining plate (10) is poured to complete filling of the process pit.
8. The pipe well seepage-proofing and well-sealing treatment method for the ultra-deep underground structure bottom plate according to claim 7, characterized in that: a stop valve (16) is also connected in series on the water inlet pipe exposed out of the pit cushion layer (14), and the cut water inlet pipe is sealed by the stop valve (16).
9. The pipe well seepage-proofing and well-sealing treatment method for the ultra-deep underground structure bottom plate according to claim 8, characterized in that: when the concrete bottom plate body (9) at the position of the process pit is poured, a water stop steel plate (17) extending out of the existing concrete bottom plate body (9) is arranged in the side wall of the existing concrete bottom plate body (9) along the circumferential direction, and then the concrete bottom plate body (9) at the position of the process pit is poured.
10. The pipe well seepage-proofing and well-sealing treatment method for the ultra-deep underground structure bottom plate according to claim 9, characterized in that: the concrete bottom plate body (9) at the position of the process pit is formed by pouring higher-grade micro-expansion impervious concrete than the existing concrete bottom plate body (9).
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| CN101768976A (en) * | 2009-12-29 | 2010-07-07 | 中建城市建设发展有限公司 | Base pit dewatering and water saving device and construction method thereof |
| CN203429654U (en) * | 2013-09-04 | 2014-02-12 | 中国十九冶集团有限公司 | Accumulated water removing device for foundation pit |
| CN203768926U (en) * | 2014-04-08 | 2014-08-13 | 江苏扬州建工建设集团有限公司 | Basement deep well plugging device |
| CN104196045A (en) * | 2014-08-28 | 2014-12-10 | 青岛海川建设集团有限公司 | Well mouth sealing device and method for deep well and dewatering well in underground garage foundation pit |
| CN105484277A (en) * | 2015-11-19 | 2016-04-13 | 中国建筑第七工程局有限公司 | Component for tubular well precipitation construction in elevator foundation pit or sump and construction method |
| CN109898533A (en) * | 2019-03-27 | 2019-06-18 | 中建一局集团第二建筑有限公司 | Raft plate built-in dewatering structure, well sealing structure of dewatering well and well sealing method |
| JP2019183410A (en) * | 2018-04-03 | 2019-10-24 | 株式会社大林組 | Recharge method and recharge well system |
| CN112227395A (en) * | 2020-10-13 | 2021-01-15 | 机械工业勘察设计研究院有限公司 | Well sealing device and method for large-water-pressure-drop well in building raft |
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2021
- 2021-04-25 CN CN202110463706.1A patent/CN113174985A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101768976A (en) * | 2009-12-29 | 2010-07-07 | 中建城市建设发展有限公司 | Base pit dewatering and water saving device and construction method thereof |
| CN203429654U (en) * | 2013-09-04 | 2014-02-12 | 中国十九冶集团有限公司 | Accumulated water removing device for foundation pit |
| CN203768926U (en) * | 2014-04-08 | 2014-08-13 | 江苏扬州建工建设集团有限公司 | Basement deep well plugging device |
| CN104196045A (en) * | 2014-08-28 | 2014-12-10 | 青岛海川建设集团有限公司 | Well mouth sealing device and method for deep well and dewatering well in underground garage foundation pit |
| CN105484277A (en) * | 2015-11-19 | 2016-04-13 | 中国建筑第七工程局有限公司 | Component for tubular well precipitation construction in elevator foundation pit or sump and construction method |
| JP2019183410A (en) * | 2018-04-03 | 2019-10-24 | 株式会社大林組 | Recharge method and recharge well system |
| CN109898533A (en) * | 2019-03-27 | 2019-06-18 | 中建一局集团第二建筑有限公司 | Raft plate built-in dewatering structure, well sealing structure of dewatering well and well sealing method |
| CN112227395A (en) * | 2020-10-13 | 2021-01-15 | 机械工业勘察设计研究院有限公司 | Well sealing device and method for large-water-pressure-drop well in building raft |
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Application publication date: 20210727 |
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