CN106567397B - The control method and control device of deep basal pit underground water - Google Patents
The control method and control device of deep basal pit underground water Download PDFInfo
- Publication number
- CN106567397B CN106567397B CN201610989202.2A CN201610989202A CN106567397B CN 106567397 B CN106567397 B CN 106567397B CN 201610989202 A CN201610989202 A CN 201610989202A CN 106567397 B CN106567397 B CN 106567397B
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- outer sleeve
- pit
- seal ring
- well pipe
- flange
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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
-
- 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
-
- 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
- E02D19/20—Restraining of underground water by damming or interrupting the passage of underground water by displacing the water, e.g. by compressed air
-
- 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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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Piles And Underground Anchors (AREA)
- Sewage (AREA)
Abstract
The present invention provides a kind of control methods of deep basal pit underground water, include the following steps：Start to dig catch pit at lithic drainage convergence；It takes one section of spiral welded pipe as outer sleeve, is welded with outer seal ring in outer sleeve outer wall face, interior seal ring is welded in outer sleeve lining face；Take one section of steel pipe as downcast well pipe, the lower part in outer sleeve is arranged in downcast well pipe, and connecting flange is welded on downcast well pipe top；Immersible pump is put into catch pit and carries out operation of drawing water；Bottom cushion starts to bind the steel reinforcement cage poured needed for base plate of foundation pit after the completion of pouring；Pouring for base plate of foundation pit concrete is carried out, immersible pump is closed and taken out after meeting design requirement, the mounting flange blind plate on connecting flange.The present invention can solve the problems, such as to produce good dewatering effect in the application of Practical Project since underground underground river, rock interstitial water are dug the caused concreting that can not carry out base plate of foundation pit of having no progeny in the supporting type deep pit digging operation of no slope.
Description
Technical field
The present invention relates to a kind of Yield rainfall relation technology of base pit engineering, specifically a kind of deep basal pit Groundwater Control method
And control device.
Background technology
The production and operation of modern most industry, all be unable to do without the consumption of a large amount of water, so all closer water in addressing
Source, such as close to river, lake and coastal area, the subsurface geologic structures in these areas are more changeable, and lithic drainage is more complex, works as work
Part-structure is limited because of excavation face in industry structure, when carrying out supporting type deep pit digging operation without slope, works as excavation pit
The pressure-bearing in underground water is inevitably encountered when reducing after the thickness to certain degree of water-bearing layer overlying impermeable stratum
Water, the wherein head pressure of artesian water can capping or destroy by rush of water base plate of foundation pit so that cause it is prominent emerge in large numbers as, how to underground water into
Row processing is smoothed out just with ensureing that structural concrete pours operation at primarily being solved the problems, such as in constructing.Common practices is
Dewatering well is set with the moisture in drainage base soil on foundation pit periphery, but still there is partly bottom of foundation ditch sometimes after dewatering well is arranged
Lower water penetrates into, and when the water that general bottom pours in is less and hydraulic pressure is smaller, just first pours bottom cushion, then directly pours base again
Bottom plate is cheated, needs to carry out encapsulating closure if still occurring through seepage point after base plate of foundation pit pours；But works as and encounter rock gap water etc.
When the water system of larger permeable amount, operation is poured using then can not directly carry out base plate of foundation pit after dewatering well, it is also necessary to be added
The dewatering operation on big foundation pit periphery, which not only adds workloads, and often its dewatering effect is also bad.
Invention content
An object of the present invention is just to provide a kind of deep basal pit Groundwater Control method, to solve the prior art in deep base
The problem of heavy workload present in processing when hole pours base plate of foundation pit to underground water.
The second object of the present invention is just to provide a kind of deep basal pit Groundwater Control device, with solving existing deep basal pit
Dewatering effect present in lower water controller is poor and the high problem of cost of investment.
What an object of the present invention was realized in：A kind of control method of deep basal pit underground water, includes the following steps：
A, it is chosen at the lithic drainage convergence at Foundation Pit bottom according to geology exploration report and live Spot experience, in Foundation Pit
Being on the corresponding position of vertical direction with lithic drainage convergence for bottom starts to dig catch pit；
B, take one section of spiral welded pipe as outer sleeve, the height of the outer sleeve is slightly less than the thickness of bottom cushion to be poured
The sum of with the thickness of base plate of foundation pit to be poured, the internal diameter of the outer sleeve is 50~100 millimeters bigger than the internal diameter of the catch pit；It will
The outer sleeve is placed on the top of catch pit；It is welded with sealing outside annular in the upper and lower part of the outer sleeve outside wall surface
Ring has seal ring in the annular coaxial with the outer sleeve in the lower weld of the outer sleeve internal face；
C, one section of outer diameter is taken to be slightly less than the steel pipe of the interior seal ring internal diameter as downcast well pipe, the downcast well pipe setting
Lower part in the outer sleeve, the outside wall surface of the bottom end of the downcast well pipe by welding with the interior seal ring
Internal face is fixed together, and connecting flange, the connecting flange are welded in the outside wall surface on the downcast well pipe top
Top be less than the top of the outer sleeve, and get out the flange gasket and blank flange mating with the connecting flange；
D, immersible pump is put by the downcast well pipe in the catch pit and carries out operation of drawing water, when level of ground water drops to
Pouring for bottom cushion is carried out when below catch pit top, operation of drawing water continues；
E, bottom cushion starts to bind the steel reinforcement cage poured needed for base plate of foundation pit, lower layer's reinforcing bar of steel reinforcement cage after the completion of pouring
Stiffener need to be increased when binding the outside wall surface of outer sleeve, the bottom end of the top bars of steel reinforcement cage is higher than the top of the outer sleeve
End will cut open at the position corresponding to downcast well pipe top of top bars and constitute a preformed hole, the diameter of the preformed hole
It is slightly less than the outer diameter of outer sleeve；
F, pouring for base plate of foundation pit concrete is carried out, while operation of drawing water is carried out using the immersible pump, works as base plate of foundation pit
Concreting to slightly below outer sleeve top when the immersible pump closed and taken out, by flange gasket and blank flange
It is connected in turn from down to up on the connecting flange to carry out the closure work of downcast well pipe, it is by bolt that blank flange is tight
Gu on connecting flange；
G, blank flange will carry out the overlap joint welding of reinforcing bar, institute after installation is complete at the preformed hole of steel reinforcement cage top bars
It states the reinforcement welding at preformed hole and concreting work, the coagulation poured in outer sleeve is carried out to the inside of outer sleeve after the completion
Stop concrete after soil and bottom plate top flat row pours work.
In step a, bottom of foundation ditch is provided with a plurality of gutter being connected to the catch pit, in the gutter
Lower half is equipped with the stone that grain size is 10 millimeters~30 millimeters, and it is 5 millis that the first half in the gutter, which is equipped with grain size,
Rice~10 millimeters of stone.
In the joint of the interior seal ring and the outer sleeve, along the circumferential direction uniform welding has multiple reinforcement wing plates.
The outer seal ring on the outer sleeve top is arranged at upper the 1/3 of the outer sleeve length, the outer sleeve
The outer seal ring of lower part is arranged at lower the 1/3 of the outer sleeve length.
The second object of the present invention is to what is be achieved：A kind of control device of deep basal pit underground water, including outer sleeve and
The downcast well pipe of lower part in the outer sleeve is set；The outer sleeve uses spiral welded pipe, the height of the outer sleeve to omit
Less than the sum of the thickness of the thickness and base plate of foundation pit to be poured of bottom cushion to be poured, on the top of the outer sleeve outside wall surface and
Lower part is welded with the outer seal ring of annular, has the annular coaxial with the outer sleeve in the lower weld of the outer sleeve internal face
Interior seal ring；
The downcast well pipe is slightly less than the steel pipe of the interior seal ring internal diameter using outer diameter, and the downcast well pipe is arranged in institute
State the lower part in outer sleeve, the outside wall surface of the bottom end of the downcast well pipe inner wall with the interior seal ring by welding
Face is fixed together, and connecting flange, the top of the connecting flange are welded in the outside wall surface on the downcast well pipe top
End is disposed on the top of the downcast well pipe and matches with the connecting flange less than the top of the outer sleeve from down to up
The flange gasket of set and the dismountable blank flange mating with the connecting flange, the blank flange by bolt with it is described
Connecting flange connects.
In the joint of the interior seal ring and the outer sleeve, along the circumferential direction uniform welding has multiple reinforcement wing plates.
The outer seal ring on the outer sleeve top is arranged at upper the 1/3 of the outer sleeve length, the outer sleeve
The outer seal ring of lower part is arranged at lower the 1/3 of the outer sleeve length.
The present invention, which is in the convergence of Foundation Pit bottom and lithic drainage on the corresponding position of vertical direction, to be started to dig catch pit,
Take one section of spiral welded pipe as outer sleeve, outer sleeve be placed on to the top of catch pit, outer sleeve outer wall face top and under
Portion is welded with the outer seal ring of annular, and the lower weld in outer sleeve lining face has seal ring in the annular coaxial with outer sleeve,
Downcast well pipe is arranged the lower part in outer sleeve, the outside wall surface of the bottom end of downcast well pipe by welding with interior seal ring
Internal face is fixed together, can be through the invention when the precipitation when excavation of foundation pit cannot be satisfied its execution conditions
Downcast well pipe carries out precipitation again in the casting process of base plate of foundation pit, restrained effectively gushing for the following underground water of bottom of foundation ditch
Go out, improves the intensity of base plate of foundation pit concrete.
The present invention can solve in the supporting type deep pit digging operation of no slope due to underground underground river, rock interstitial water quilt
The problem of can not carrying out the concreting of base plate of foundation pit caused by digging is had no progeny, both can be applied to the abundant sand stone layer of water content,
Dewatering well is not achieved in the supporting type deep-foundation pit engineering of dewatering effect on the outside of decomposed rock rock layers etc., can also be applied to large-scale raft plate base
Plinth and processing, the present invention produce good dewatering effect in the application of Practical Project.
Description of the drawings
Fig. 1 is the structural schematic diagram of the Groundwater Control device of the present invention.
Fig. 2 is the vertical view of the Groundwater Control device of the present invention.
In figure：1, outer sleeve；2, outer seal ring；3, interior seal ring；4, downcast well pipe；5, connecting flange；6, reinforce wing plate.
Specific implementation mode
Embodiment 1：
As depicted in figs. 1 and 2, the control method of deep basal pit underground water of the present invention includes the following steps：
A, it is chosen at the lithic drainage convergence at Foundation Pit bottom according to geology exploration report and live Spot experience, in Foundation Pit
Being on the corresponding position of vertical direction with lithic drainage convergence for bottom starts to dig catch pit, and the depth of catch pit is 1000 millimeters
~1200 millimeters, bottom of foundation ditch is provided with a plurality of gutter being connected to catch pit, the width in gutter is 300 millimeters, row
The depth in ditch is 100 millimeters, and the lower half in gutter is equipped with the stone that grain size is 10 millimeters~30 millimeters, is draining
The first half in ditch is equipped with the stone that grain size is 5 millimeters~10 millimeters, i.e., is laid with 10 millimeters in gutter at 50 millimeters of lower part
~30 millimeters of stone is laid with 5 millimeters~10 millimeters of handstone at 50 millimeters of top.
B, take one section of spiral welded pipe as outer sleeve 1, the height of outer sleeve 1 be slightly less than the thickness of bottom cushion to be poured with
The outer diameter of the sum of the thickness of base plate of foundation pit to be poured, outer sleeve 1 is 900 millimeters~1000 millimeters, and the internal diameter of outer sleeve 1 is than collection
The internal diameter in puddle is 50~100 millimeters big, and the wall thickness of outer sleeve 1 is 10 millimeters, and outer sleeve 1 is placed on to the top of catch pit.
The upper and lower part of 1 outside wall surface of outer sleeve is welded with the outer seal ring 2 of annular, and the width of outer seal ring 2 is greater than or equal to 200 millis
Rice.The outer seal ring 2 on 1 top of outer sleeve is arranged at upper the 1/3 of 1 length of outer sleeve, and the outer seal ring 2 of 1 lower part of outer sleeve is set
It sets at lower the 1/3 of 1 length of outer sleeve.There is sealing in the annular coaxial with outer sleeve 1 in the lower weld of 1 internal face of outer sleeve
The middle part of ring 3, interior seal ring 3 is 100 millimeters~150 millimeters at a distance from the vertical direction of 1 bottom end of outer sleeve, interior seal ring 3
Thickness be greater than or equal to 16 millimeters, the joint of interior seal ring 3 and outer sleeve 1 along the circumferential direction uniform welding have it is multiple plus
Strong wing plate 6 reinforces wing plate 6 and uses triangular steel plate.
C, one section of outer diameter is taken to be slightly less than the steel pipe of 3 internal diameter of interior seal ring as downcast well pipe 4, the internal diameter of downcast well pipe 4 is
250 millimeters, fully meet the disengaging requirement of immersible pump.Vertical direction between 3 top of the top of downcast well pipe 4 and interior seal ring
Distance be 150 millimeters~200 millimeters, the lower part in outer sleeve 1, the outer wall of the bottom end of downcast well pipe 4 is arranged in downcast well pipe 4
Internal face of the face by welding with interior seal ring 3 is fixed together, and is welded in the outside wall surface on 4 top of downcast well pipe
It is connected to connecting flange 5, the top of connecting flange 5 is less than the top of outer sleeve 1, and gets out the flange mating with connecting flange 5
Gasket and blank flange.Weld, interior seal ring between outer seal ring and outer sleeve and the weld between outer sleeve, it is interior only
Weld, connecting flange between water ring and downcast well pipe and the weld between downcast well pipe reinforce wing plate and interior seal ring
Between weld and reinforce the mode that the weld between wing plate and outer sleeve is all made of welding by both sides.
D, immersible pump is put by downcast well pipe 4 in catch pit and carries out operation of drawing water, when level of ground water drops to catch pit
Pouring for bottom cushion is carried out when below top, operation of drawing water continues.
E, bottom cushion starts to bind the steel reinforcement cage poured needed for base plate of foundation pit, lower layer's reinforcing bar of steel reinforcement cage after the completion of pouring
Stiffener need to be increased when binding the outside wall surface of outer sleeve 1, the bottom end of the top bars of steel reinforcement cage is higher than the top of outer sleeve 1
End, will cut open at the position corresponding to 4 top of downcast well pipe of top bars and constitutes a preformed hole, and the diameter of preformed hole is smaller
In the outer diameter of outer sleeve 1.
F, pouring for base plate of foundation pit concrete is carried out, while operation of drawing water is carried out using immersible pump, when mixing for base plate of foundation pit
Solidifying soil pours to when the slightly below top of outer sleeve 1 and immersible pump is closed and taken out, and flange gasket and blank flange are arrived by down
On be connected in turn to carry out the closure work of downcast well pipe 4 on connecting flange 5, blank flange is fastened on by connection by bolt
On flange 5, even circumferential distribution of the bolt where it.
G, blank flange will carry out the overlap joint welding of reinforcing bar, in advance after installation is complete at the preformed hole of steel reinforcement cage top bars
It boxes out and concreting work, the concrete poured in outer sleeve 1 is carried out to the inside of outer sleeve 1 after the completion of the reinforcement welding at place
Work is poured with concrete is stopped after bottom plate top flat row.
Embodiment 2：
As depicted in figs. 1 and 2, the control device of deep basal pit underground water of the present invention includes outer sleeve 1 and is arranged in outer sleeve 1
The downcast well pipe 4 of interior lower part.Outer sleeve 1 uses spiral welded pipe, the height of outer sleeve 1 to be slightly less than the thickness of bottom cushion to be poured
It spends and the sum of the thickness of base plate of foundation pit to be poured, the outer diameter of outer sleeve 1 is 900 millimeters~1000 millimeters, the internal diameter of outer sleeve 1
50~100 millimeters bigger than the internal diameter of catch pit, the wall thickness of outer sleeve 1 is 10 millimeters.On the top of 1 outside wall surface of outer sleeve under
Portion is welded with the outer seal ring 2 of annular, and the width of outer seal ring 2 is greater than or equal to 200 millimeters.The outer sealing on 1 top of outer sleeve
Ring 2 is arranged at upper the 1/3 of 1 length of outer sleeve, and the outer seal ring 2 of 1 lower part of outer sleeve is arranged lower the 1/3 of 1 length of outer sleeve
Place.Have a seal ring 3 in the annular coaxial with outer sleeve 1 in the lower weld of 1 internal face of outer sleeve, the middle part of interior seal ring 3 with
The distance of the vertical direction of 1 bottom end of outer sleeve is 100 millimeters~150 millimeters, and the thickness of interior seal ring 3 is greater than or equal to 16 millis
Rice.In the joint of interior seal ring 3 and outer sleeve 1, along the circumferential direction uniform welding has multiple reinforcement wing plates 6, reinforces wing plate 6 and adopts
Use triangular steel plate.
Downcast well pipe 4 is slightly less than the steel pipe of 3 internal diameter of interior seal ring using outer diameter, and the internal diameter of downcast well pipe 4 is 250 millimeters,
Fully meet the disengaging requirement of immersible pump.The top of downcast well pipe 4 is at a distance from the vertical direction between 3 top of interior seal ring
150 millimeters~200 millimeters, the lower part in outer sleeve 1 is arranged in downcast well pipe 4, and the outside wall surface of the bottom end of downcast well pipe 4 passes through weldering
The mode connect and the internal face of interior seal ring 3 are fixed together, and connection is welded in the outside wall surface on 4 top of downcast well pipe
Flange 5, the top of connecting flange 5 are less than the top of outer sleeve 1, the top of downcast well pipe 4 be disposed with from down to up with
The mating flange gasket of connecting flange 5 and the dismountable blank flange mating with connecting flange 5, blank flange by bolt with
Connecting flange 5 connects, even circumferential distribution of the bolt where it.
Claims (4)
1. a kind of control method of deep basal pit underground water, characterized in that include the following steps：
A, it is chosen at the lithic drainage convergence at Foundation Pit bottom according to geology exploration report and live Spot experience, at Foundation Pit bottom
It is on the corresponding position of vertical direction with lithic drainage convergence and starts to dig catch pit；
B, take one section of spiral welded pipe as outer sleeve, the height of the outer sleeve is slightly less than the thickness of bottom cushion to be poured and waits for
The sum of the thickness of base plate of foundation pit is poured, the internal diameter of the outer sleeve is 50~100 millimeters bigger than the internal diameter of the catch pit；It will be described
Outer sleeve is placed on the top of catch pit；It is welded with seal ring outside annular in the upper and lower part of the outer sleeve outside wall surface,
There is seal ring in the annular coaxial with the outer sleeve in the lower weld of the outer sleeve internal face；
C, one section of outer diameter is taken to be slightly less than the steel pipe of the interior seal ring internal diameter as downcast well pipe, the downcast well pipe is arranged in institute
State the lower part in outer sleeve, the outside wall surface of the bottom end of the downcast well pipe inner wall with the interior seal ring by welding
Face is fixed together, and connecting flange, the top of the connecting flange are welded in the outside wall surface on the downcast well pipe top
End is less than the top of the outer sleeve, and gets out the flange gasket and blank flange mating with the connecting flange；Described
The top of downcast well pipe be disposed with from down to up the flange gasket mating with the connecting flange and with the connecting flange
Mating dismountable blank flange, the blank flange are connect by bolt with the connecting flange；
D, immersible pump is put by the downcast well pipe in the catch pit and carries out operation of drawing water, catchmented when level of ground water drops to
Pouring for bottom cushion is carried out when below the top of hole, operation of drawing water continues；
E, bottom cushion starts to bind the steel reinforcement cage poured needed for base plate of foundation pit, lower layer's reinforcing bar binding of steel reinforcement cage after the completion of pouring
To outer sleeve outside wall surface when need to increase stiffener, the bottom end of the top bars of steel reinforcement cage is higher than the top of the outer sleeve,
It will be cut open at the position corresponding to downcast well pipe top of top bars and constitute a preformed hole, the diameter of the preformed hole is smaller
In the outer diameter of outer sleeve；
F, pouring for base plate of foundation pit concrete is carried out, while operation of drawing water is carried out using the immersible pump, when mixing for base plate of foundation pit
Solidifying soil pours to when the top of slightly below outer sleeve and the immersible pump is closed and taken out, by flange gasket and blank flange under
To being above connected in turn to carry out the closure work of downcast well pipe on the connecting flange, blank flange is fastened on by bolt
On connecting flange；
G, blank flange will carry out the overlap joint welding of reinforcing bar after installation is complete at the preformed hole of steel reinforcement cage top bars, described pre-
Box out and concreting work carried out to the inside of outer sleeve after the completion of the reinforcement welding at place, the concrete poured in outer sleeve with
Stop concrete after bottom plate top flat row pours work.
2. the control method of deep basal pit underground water according to claim 1, characterized in that in step a, set in bottom of foundation ditch
It is equipped with a plurality of gutter being connected to the catch pit, it is 10 millimeters~30 that the lower half in the gutter, which is equipped with grain size,
The stone of millimeter, the first half in the gutter are equipped with the stone that grain size is 5 millimeters~10 millimeters.
3. the control method of deep basal pit underground water according to claim 1, characterized in that the interior seal ring with it is described
Along the circumferential direction uniform welding has multiple reinforcement wing plates for the joint of outer sleeve.
4. the control method of deep basal pit underground water according to claim 1, characterized in that the outer sleeve top it is described
Outer seal ring is arranged at upper the 1/3 of the outer sleeve length, and the outer seal ring of the outer sleeve lower part is arranged described
At lower the 1/3 of outer sleeve length.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610989202.2A CN106567397B (en) | 2016-11-10 | 2016-11-10 | The control method and control device of deep basal pit underground water |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610989202.2A CN106567397B (en) | 2016-11-10 | 2016-11-10 | The control method and control device of deep basal pit underground water |
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| Publication Number | Publication Date |
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| CN106567397A CN106567397A (en) | 2017-04-19 |
| CN106567397B true CN106567397B (en) | 2018-10-02 |
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| CN201610989202.2A Active CN106567397B (en) | 2016-11-10 | 2016-11-10 | The control method and control device of deep basal pit underground water |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106939610A (en) * | 2017-05-09 | 2017-07-11 | 青岛东捷建设工程有限公司 | A kind of integrated precipitation pumping system |
| CN113605431A (en) * | 2021-09-17 | 2021-11-05 | 中建八局天津建设工程有限公司 | Plugging structure for water collecting pit and construction method thereof |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3756889B2 (en) * | 2003-04-23 | 2006-03-15 | 和裕 浦田 | Kamaba drainage box |
| CN204266220U (en) * | 2014-11-24 | 2015-04-15 | 中国水利水电第十四工程局有限公司 | A kind of plugging device of precipitation well in foundation pit |
| CN204343312U (en) * | 2014-12-15 | 2015-05-20 | 中国建筑一局(集团)有限公司 | A kind of plugging device of precipitation well in foundation pit |
| CN104846837B (en) * | 2015-04-10 | 2016-12-07 | 江苏南通三建集团有限公司 | The construction method of ultra-deep well in a kind of bright draining foundation ditch |
| CN205444214U (en) * | 2015-12-23 | 2016-08-10 | 中铁建设集团有限公司 | Deep basal pit superelevation water level precipitation well well head plugging device |
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2016
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Effective date of registration: 20170511 Address after: 201900 Shanghai city Baoshan District Pangu Road No. 777 Applicant after: China Twenty Metallurgical Group Co., Ltd. Applicant after: Hebei 20 smelting Construction Company Limited Address before: 054100, 29, welcome street, Shahe, Hebei, Xingtai Applicant before: Hebei 20 smelting Construction Company Limited |
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