CN113863343A - Construction method of dewatering well capable of being continuously utilized - Google Patents
Construction method of dewatering well capable of being continuously utilized Download PDFInfo
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- CN113863343A CN113863343A CN202111109206.4A CN202111109206A CN113863343A CN 113863343 A CN113863343 A CN 113863343A CN 202111109206 A CN202111109206 A CN 202111109206A CN 113863343 A CN113863343 A CN 113863343A
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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
- 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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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
- E03B3/00—Methods or installations for obtaining or collecting drinking water or tap water
- E03B3/06—Methods or installations for obtaining or collecting drinking water or tap water from underground
- E03B3/08—Obtaining and confining water by means of wells
- E03B3/10—Obtaining and confining water by means of wells by means of pit wells
- E03B3/11—Obtaining and confining water by means of wells by means of pit wells in combination with tubes, e.g. perforated, extending horizontally, or upwardly inclined, exterior to the pits
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
- E03B3/00—Methods or installations for obtaining or collecting drinking water or tap water
- E03B3/06—Methods or installations for obtaining or collecting drinking water or tap water from underground
- E03B3/08—Obtaining and confining water by means of wells
- E03B3/16—Component parts of wells
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- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
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- Health & Medical Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
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- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The invention discloses a construction method of a dewatering well capable of being continuously utilized, which comprises the following steps: performing well-forming construction; step two: dewatering the foundation pit; step three: excavating a foundation pit; step four: cutting a well pipe; step five: arranging a water pumping pipeline; step six: constructing a cushion layer, a waterproof layer and a main structure; step seven: and (5) subsequently getting water. Through the well head design in the foundation ditch bottom, the concrete cushion, the waterproof layer, the main part bottom plate can be the whole construction, need not carry out special treatment to well head and waterproof layer and bottom plate junction, the construction is simple, be favorable to guaranteeing the construction quality of waterproof layer and main part bottom plate, reduce construction cost, construction efficiency is improved, and fundamentally has solved because of the drainage well shutoff is not tight, the percolating water problem that causes because of reasons such as being connected insecure with the main part bottom plate, the dewatering well still remains original function after accomplishing the dewatering operation simultaneously, the later stage can change into the reserve water source of construction and operation phase, sustainable utilization, effectual reduction wasting of resources, reduce construction and operation cost.
Description
Technical Field
The invention belongs to the technical field of dewatering wells, and particularly relates to a construction method of a dewatering well capable of being continuously utilized.
Background
Along with people's demand to underground space is bigger and bigger, deep and large foundation ditch engineering is more and more general, and deep and large foundation ditch engineering dewatering generally adopts underground foundation ditch precipitation well at present, and this structure has advantages such as construction is simple, be suitable for extensively, the dewatering degree of depth is big.
The traditional precipitation well is limited by a precipitation method and is arranged in a main engineering bottom plate, when the precipitation well finishes precipitation operation, plugging is needed, and as the reliable connection between the precipitation well mouth plugging part and a concrete bottom plate is not available, the problem of bottom plate water leakage is easy to occur in the later period; in addition, the dewatering well is equivalent to a 'waste well' after being closed, and does not continuously play a role subsequently, so that great resource waste is caused.
Therefore, the invention provides a construction method of the dewatering well capable of being continuously utilized.
Disclosure of Invention
The invention aims to provide a construction method of a dewatering well capable of being continuously utilized, which solves the problem of water leakage at the closed part of the traditional dewatering well, and has the advantages of being capable of being continuously utilized and providing a standby water source for subsequent engineering construction and operation.
In order to achieve the purpose, the invention provides the following technical scheme: a construction method of a sustainable-utilization dewatering well comprises the following steps: performing well-forming construction; step two: dewatering the foundation pit; step three: excavating a foundation pit; step four: cutting a well pipe; step five: arranging a water pumping pipeline; step six: constructing a cushion layer, a waterproof layer and a main structure; step seven: subsequently getting water; the method specifically comprises the following steps:
the method comprises the following steps: performing well-forming construction;
lofting a well position, making a well mouth, installing a protective cylinder, after the preparation process is finished, positioning a drilling machine, drilling, cleaning holes, backfilling a sand cushion layer at the bottom of the well, hoisting a well casing, and then backfilling a gravel water filtering layer between the dewatering well casing and the wall of the well;
step two: dewatering the foundation pit;
installing pumping equipment, installing the pumping equipment on the ground outside the range of the foundation pit, pumping water into the interior of the dewatering well, and waiting for the underground water level to be reduced to a design required value;
step three: excavating a foundation pit;
excavating a foundation pit to a designed depth;
step four: cutting a well pipe;
cutting the precipitation well pipe to be flush with the bottom of the foundation pit, and cutting a groove at the top end of the side wall of the precipitation well pipe to facilitate the subsequent embedding of the PVC pipeline group;
step five: arranging a water pumping pipeline;
the method comprises the following steps that two PVC pipelines of a drain pipe and an exhaust pipe are embedded in parallel along the bottom of a foundation pit and a side wall base surface, a bottom pipe opening of the drain pipe is arranged at the lowest designed water level position in a precipitation well pipe, the distance between the lower end pipe opening of the exhaust pipe and the lower end pipe opening of the drain pipe is 50cm, and the top end of the drain pipe is connected with a water pumping device for draining water; the top end of the exhaust pipe is communicated with the atmosphere and is used for exhausting air, so that negative pressure is prevented from being formed during drainage, drainage is not convenient, and the exhaust pipe can also be used as a drainage standby pipe; in addition, the corners of the PVC pipelines are connected by PVC pipe adapter joints, and sealing is well done;
step six: constructing a cushion layer, a waterproof layer and a main structure;
laying a dewatering well cover plate at the dewatering well mouth, covering the well mouth, and then sequentially carrying out construction of a concrete cushion layer, a waterproof layer and a main structure;
step seven: subsequently getting water;
the water source in the precipitation well pipe can be pumped out from the drain pipe through the pumping equipment and is used as a standby water source in the subsequent construction and operation periods.
Preferably, in the sixth step, the construction of the concrete cushion, the waterproof layer and the main structure is an integral construction mode.
Preferably, a sustainable use's precipitation well, includes the precipitation well body, the inside of precipitation well body is provided with the PVC nest of tubes.
Preferably, the inside of precipitation well body is provided with the precipitation well pipe, it has gravel drainage layer to fill between precipitation well pipe and the precipitation well body, precipitation well apron has been laid at the top of precipitation well body.
Preferably, the PVC nest of tubes includes drain pipe and blast pipe, the other end that precipitation well body was kept away from to the drain pipe runs through precipitation well pipe fixedly connected with pumping equipment, the other end of PVC nest of tubes extends to the inside of precipitation well pipe, the lower extreme of blast pipe and the lower extreme of drain pipe are spaced 50cm from top to bottom between.
Preferably, the bent parts of the drain pipe and the exhaust pipe are provided with PVC pipe conversion joints.
Compared with the prior art, the invention has the beneficial effects that:
1. the well head design is in the foundation ditch bottom, and concrete cushion, waterproof layer, main part bottom plate can the integral construction, and the well head need not do the sealing treatment again, also need not carry out special treatment to well head and waterproof layer and bottom plate junction, and construction process is simple, and the simple operation is favorable to guaranteeing the construction quality of waterproof layer and main part bottom plate, is favorable to reducing construction cost, is favorable to improving the efficiency of construction, simultaneously, fundamentally has solved because of the not tight shutoff of precipitation well, the seepage water problem that causes with reasons such as main part bottom plate is not firm.
2. This scheme has still remained original function after precipitation well accomplishes precipitation operation, and the later stage can change into the reserve water source of construction and operation period, if: the construction period is clean, the main body is maintained and the water is used, the operation period is green, the fire-fighting water is used, and the like, so that the water can be continuously utilized, the resource waste is effectively reduced, and the construction and operation cost is reduced.
3. The pumping equipment is placed outside, so that the installation and maintenance are convenient, the pumping equipment does not need to be detached after precipitation is finished, the pumping equipment can be continuously utilized, and one of the two PVC pipes is used for draining water; the other pipe is communicated with the atmosphere at the top end and is used for exhausting air, so that negative pressure is prevented from being formed during drainage, drainage is not convenient, and the other pipe can also be used as a spare drainage pipe.
Drawings
FIG. 1 is a schematic cross-sectional view of the present invention;
FIG. 2 is a schematic cross-sectional view of the structure at B-B in FIG. 1 according to the present invention;
FIG. 3 is an enlarged view of the structure at A in FIG. 1 according to the present invention;
FIG. 4 is a construction flow chart of the present invention.
In the figure: 1. a dewatering well body; 2. a precipitation well pipe; 3. a PVC pipe group; 4. a gravel water filtering layer; 5. a PVC pipe crossover sub; 6. a water pumping device; 7. a drainage ditch; 8. a dewatering well cover plate; 9. a concrete cushion; 10. a waterproof layer; 11. a main body bottom plate; 12. a main body side wall; 13. a soil layer; 14. a ground surface; 15. a drain pipe; 16. an exhaust pipe; 17. a body structure; 18. and (6) foundation pit.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 4, a construction method of a sustainable dewatering well includes the following steps: performing well-forming construction; step two: dewatering the foundation pit; step three: excavating a foundation pit; step four: cutting a well pipe; step five: arranging a water pumping pipeline; step six: constructing a cushion layer, a waterproof layer and a main structure; step seven: subsequently getting water; the method specifically comprises the following steps:
the method comprises the following steps: performing well-forming construction;
and (3) lofting the well position, making a well mouth, installing a protective cylinder, after the preparation process is finished, positioning a drilling machine, drilling, cleaning holes, backfilling a sand cushion layer at the bottom of the well, hoisting the well casing, and then backfilling a gravel water filtering layer 4 between the dewatering well casing 2 and the wall of the hole.
Step two: dewatering the foundation pit;
and (4) installing a pumping device 6, installing the pumping device 6 on the ground 14 outside the range of the foundation pit, pumping water into the interior of the dewatering well, and waiting for the underground water level to be reduced to the value required by the design.
Step three: excavating a foundation pit;
and excavating a foundation pit 18, and excavating the foundation pit 18 to the designed depth.
Step four: cutting a well pipe;
the precipitation well pipe 2 is cut to be flush with the bottom of the foundation pit 18, a groove is cut at the top end of the side wall of the precipitation well pipe 2, and the PVC pipeline group 3 is convenient to embed subsequently.
Step five: arranging a water pumping pipeline;
two PVC pipelines of a drain pipe 15 and an exhaust pipe 16 are embedded in parallel along the bottom and side wall base surface of the foundation pit 18, a bottom pipe orifice of the drain pipe 15 is arranged at the lowest designed water level position in the precipitation well pipe 2, the distance between a lower end pipe orifice of the exhaust pipe 16 and a lower end pipe orifice of the drain pipe 15 is 50cm, and the top end of the drain pipe 15 is connected with a water pumping device 6 for draining water; the top end of the exhaust pipe 16 is communicated with the atmosphere for exhausting air, so that negative pressure is prevented from being formed during drainage, drainage is not convenient, and the exhaust pipe can be used as a drainage standby pipe; in addition, the corners of the PVC pipelines are connected by PVC pipe adapter joints 5 and sealed.
Step six: constructing a cushion layer, a waterproof layer and a main structure;
and laying a dewatering well cover plate 8 at the dewatering well mouth, covering the well mouth, and then sequentially constructing a concrete cushion 9, a waterproof layer 10 and a main structure 17.
Step seven: subsequently getting water;
the water source in the precipitation well pipe 2 can be pumped out from the drain pipe 15 through the pumping equipment 6 and used as a standby water source in subsequent construction and operation periods.
This scheme has still remained original function after precipitation well accomplishes precipitation operation, and the later stage can change into the reserve water source of construction and operation period, if: the construction period is clean, the main body is maintained and the water is used, the operation period is green, the fire-fighting water is used, and the like, so that the water can be continuously utilized, the resource waste is effectively reduced, and the construction and operation cost is reduced.
Preferably, in the sixth step, the concrete pad 9, the waterproof layer 10 and the main structure 17 are constructed integrally.
The well head design is in the foundation ditch bottom, and concrete cushion, waterproof layer, main part bottom plate can the integral construction, and the well head need not do the sealing treatment again, also need not carry out special treatment to well head and waterproof layer and bottom plate junction, and construction process is simple, and the simple operation is favorable to guaranteeing the construction quality of waterproof layer and main part bottom plate, is favorable to reducing construction cost, is favorable to improving the efficiency of construction, simultaneously, fundamentally has solved because of the not tight shutoff of precipitation well, the seepage water problem that causes with reasons such as main part bottom plate is not firm.
Referring to fig. 1-3, the present invention provides a technical solution: the utility model provides a sustainable utilization's precipitation well, includes precipitation well body 1, the inside of precipitation well body 1 is provided with PVC nest of tubes 3, and the inside of precipitation well body 1 is provided with precipitation well pipe 2, and it has gravel drainage layer 4 to fill between precipitation well pipe 2 and the precipitation well body 1, and precipitation well apron 8 has been laid at the top of precipitation well body 1.
Specifically, PVC nest of tubes 3 includes drain pipe 15 and blast pipe 16, and the other end that dewatering well body 1 was kept away from to drain pipe 15 runs through dewatering well pipe 2 fixedly connected with pumping equipment 6, and the other end of PVC nest of tubes 3 extends to the inside of dewatering well pipe 2, and drain pipe 15 is in the minimum water level of design in the dewatering well pipe 2, and the lower extreme of blast pipe 16 and the lower extreme of drain pipe 15 are the vertical interval of 50 cm.
Specifically, the PVC pipe adapter 5 is arranged at the bent part of the drain pipe 15 and the exhaust pipe 16, the pumping equipment 6 is placed outside, so that the installation and maintenance are convenient, the pumping equipment 6 does not need to be detached after precipitation is completed, the pumping equipment can be continuously utilized, and one of the two PVC pipes is used for draining water; the other pipe is communicated with the atmosphere at the top end and is used for exhausting air, so that negative pressure is prevented from being formed during drainage, drainage is not convenient, and the other pipe can also be used as a spare drainage pipe.
The working principle and the using process of the invention are as follows: lofting a well position, making a well mouth, installing a protective cylinder, and positioning a drilling machine after the preparation process is finished, and drilling and cleaning holes; backfilling a bottom sand cushion layer, hoisting the well casing, and then backfilling a gravel water filtering layer 4 between the dewatering well casing 2 and the wall of the well; installing a pumping device 6, installing the pumping device 6 on the ground 14 outside the range of the foundation pit, pumping water into the interior of the dewatering well, waiting for the underground water level to be reduced to a design required value, excavating the foundation pit 18, and excavating the foundation pit 18 to a design depth; cutting the precipitation well pipe 2 to be flush with the bottom of the foundation pit 18, cutting a groove at the top end of the side wall of the precipitation well pipe 2 to facilitate subsequent embedding of the PVC pipeline group 3, embedding a drain pipe 15 and an exhaust pipe 16 in parallel along the bottom of the foundation pit 18 and the base surface of the side wall, wherein a bottom pipe orifice of the drain pipe 15 is arranged at the designed lowest water level position in the precipitation well pipe 2, the vertical distance between a lower pipe orifice of the exhaust pipe 16 and a lower pipe orifice of the drain pipe 15 is 50cm, and the top end of the drain pipe 15 is connected with a water pumping device 6 for draining; the top end of the exhaust pipe 16 is communicated with the atmosphere for exhausting air, so that negative pressure is prevented from being formed during drainage, drainage is not convenient, and the exhaust pipe can be used as a drainage standby pipe; in addition, the corners of the PVC pipelines are connected by PVC pipe adapter joints 5 and sealed; laying a dewatering well cover plate 8 at the dewatering well mouth, covering the well mouth, and then sequentially constructing a concrete cushion 9, a waterproof layer 10 and a main structure 17; water source accessible pumping equipment 6 takes out from drain pipe 15 in precipitation well pipe 2, as follow-up construction and operation phase reserve water source, the well head design is in foundation ditch 18 bottom, concrete cushion 9, waterproof layer 10, main part bottom plate 11 can be whole construction, the well head need not do the closure again and handle, also need not carry out special treatment to well head and waterproof layer 10 and bottom plate junction, construction process is simple, the simple operation, be favorable to guaranteeing waterproof layer 10 and main part bottom plate 11's construction quality, be favorable to reducing construction cost, be favorable to improving the efficiency of construction, and simultaneously, fundamentally has solved because of precipitation well shutoff is not tight, the percolating water problem that causes because of reasons such as not firm with main part bottom plate 11 connection, in addition, water source accessible pumping equipment 6 takes out through drain pipe 15 in precipitation well pipe 2, the later stage can convert the reserve water source of construction and operation phase, for example: the construction period is clean, the main body is maintained and the water is used, the operation period is green, the fire-fighting water is used, and the like, so that the water can be continuously utilized, the resource waste is effectively reduced, and the construction and operation cost is reduced.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. A construction method of a dewatering well capable of being continuously utilized is characterized in that: the method comprises the following steps: performing well-forming construction; step two: dewatering the foundation pit; step three: excavating a foundation pit; step four: cutting a well pipe; step five: arranging a water pumping pipeline; step six: constructing a cushion layer, a waterproof layer and a main structure; step seven: subsequently getting water; the method specifically comprises the following steps:
the method comprises the following steps: performing well-forming construction;
lofting a well position, making a well mouth, installing a protective cylinder, after the preparation process is finished, positioning a drilling machine, drilling, cleaning holes, backfilling a sand cushion layer at the bottom of the well, hoisting the well casing, and then backfilling a gravel water filtering layer (4) between the dewatering well casing (2) and the wall of the well;
step two: dewatering the foundation pit;
installing a pumping device (6), installing the pumping device (6) on the ground (14) outside the range of the foundation pit (18), pumping water into the interior of the dewatering well, and waiting for the underground water level to be reduced to a design required value;
step three: excavating a foundation pit;
excavating a foundation pit (18), and excavating the foundation pit (18) to a designed depth;
step four: cutting a well pipe;
cutting the precipitation well pipe (2) to be flush with the bottom of the foundation pit (18), and cutting a groove at the top end of the side wall of the precipitation well pipe (2) to facilitate the subsequent embedding of the PVC pipeline group (3);
step five: arranging a water pumping pipeline;
two PVC pipelines of a drain pipe (15) and an exhaust pipe (16) are embedded side by side along the bottom and side wall basal plane of a foundation pit (18), a bottom pipe orifice of the drain pipe (15) is arranged at the lowest designed water level position in the precipitation well pipe (2), the distance between the lower end pipe orifice of the exhaust pipe (16) and the lower end pipe orifice of the drain pipe (15) is 50cm, and the top end of the drain pipe (15) is connected with a water pumping device (6) for draining water; the top end of the exhaust pipe (16) is communicated with the atmosphere and is used for exhausting air, so that negative pressure is prevented from being formed during drainage, drainage is not convenient, and the exhaust pipe can also be used as a drainage standby pipe; in addition, the corners of the PVC pipelines are connected by a PVC pipe adapter (5) and sealed;
step six: constructing a cushion layer, a waterproof layer and a main structure;
laying a dewatering well cover plate (8) at the dewatering well mouth, covering the well mouth, and then sequentially constructing a concrete cushion layer (9), a waterproof layer (10) and a main structure (17);
step seven: subsequently getting water;
the water source in the precipitation well pipe (2) can be pumped out from the drain pipe (15) through the pumping equipment (6) and used as a standby water source in subsequent construction and operation periods.
2. The construction method of the sustainable-utilization dewatering well according to claim 1, wherein the construction method comprises the following steps: and in the sixth step, the construction of the concrete cushion (9), the waterproof layer (10) and the main structure (17) is an integral construction mode.
3. A sustainable dewatering well according to claim 1, comprising a dewatering well body (1), characterized in that: the interior of the dewatering well body (1) is provided with a PVC pipe group (3).
4. A sustainable dewatering well according to claim 3, wherein: the inside of precipitation well body (1) is provided with precipitation well pipe (2), it has gravel drainage layer (4) to fill between precipitation well pipe (2) and precipitation well body (1), precipitation well apron (8) have been laid at the top of precipitation well body (1).
5. A sustainable dewatering well according to claim 4, wherein: PVC nest of tubes (3) are including drain pipe (15) and blast pipe (16), the other end that precipitation well body (1) was kept away from in drain pipe (15) runs through precipitation well pipe (2) fixedly connected with pumping equipment (6), the other end of PVC nest of tubes (3) extends to the inside of precipitation well pipe (2), the lower extreme of blast pipe (16) and the lower extreme of drain pipe (15) are between the interval about for 50 cm.
6. A sustainable dewatering well according to claim 5, wherein: and PVC pipe adapter joints (5) are arranged at the bent parts of the drain pipe (15) and the exhaust pipe (16).
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| RU2147645C1 (en) * | 1998-05-15 | 2000-04-20 | Закрытое акционерное общество Промышленно-строительная фирма "Содружество" | Method and device for lowering of ground water level in construction and operation of underground structures |
| CN106320353A (en) * | 2016-07-18 | 2017-01-11 | 中天建设集团有限公司 | Basement construction dewatering and drainage device and construction method thereof |
| CN109736340A (en) * | 2019-02-22 | 2019-05-10 | 宁蔚蔚 | A kind of sole plate reserves the dewatering device and method of dewatering well guarantee bed course integrality |
| CN111705825A (en) * | 2020-06-24 | 2020-09-25 | 深圳市建工集团股份有限公司 | Drainage and landing permanent-temporary integrated construction method for underground deep foundation pit |
| CN113279421A (en) * | 2021-06-28 | 2021-08-20 | 上海兴怡基础工程有限公司 | Vacuum dewatering process for deep foundation pit |
-
2021
- 2021-09-22 CN CN202111109206.4A patent/CN113863343A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2147645C1 (en) * | 1998-05-15 | 2000-04-20 | Закрытое акционерное общество Промышленно-строительная фирма "Содружество" | Method and device for lowering of ground water level in construction and operation of underground structures |
| CN106320353A (en) * | 2016-07-18 | 2017-01-11 | 中天建设集团有限公司 | Basement construction dewatering and drainage device and construction method thereof |
| CN109736340A (en) * | 2019-02-22 | 2019-05-10 | 宁蔚蔚 | A kind of sole plate reserves the dewatering device and method of dewatering well guarantee bed course integrality |
| CN111705825A (en) * | 2020-06-24 | 2020-09-25 | 深圳市建工集团股份有限公司 | Drainage and landing permanent-temporary integrated construction method for underground deep foundation pit |
| CN113279421A (en) * | 2021-06-28 | 2021-08-20 | 上海兴怡基础工程有限公司 | Vacuum dewatering process for deep foundation pit |
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Address after: 361009 unit 1101-1104, No. 2368, Fangzhong Road, Huli District, Xiamen City, Fujian Province Applicant after: Jianfa Hecheng Engineering Consulting Co.,Ltd. Address before: 11 / F, 2368 Fangzhong Road, Huli District, Xiamen City, Fujian Province, 361009 Applicant before: HOLSIN ENGINEERING CONSULTING GROUP CO.,LTD. |
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| CB02 | Change of applicant information |