CN108286259B - A kind of soft soil foundation base pit dewatering device - Google Patents
A kind of soft soil foundation base pit dewatering device Download PDFInfo
- Publication number
- CN108286259B CN108286259B CN201810186920.5A CN201810186920A CN108286259B CN 108286259 B CN108286259 B CN 108286259B CN 201810186920 A CN201810186920 A CN 201810186920A CN 108286259 B CN108286259 B CN 108286259B
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- Prior art keywords
- steel pipe
- sliding block
- sump
- filter
- pipe
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 239000002689 soil Substances 0.000 title claims abstract description 22
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 57
- 239000010959 steel Substances 0.000 claims abstract description 57
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 56
- 238000007667 floating Methods 0.000 claims abstract description 24
- 235000020188 drinking water Nutrition 0.000 claims abstract description 16
- 239000003651 drinking water Substances 0.000 claims abstract description 16
- 239000004746 geotextile Substances 0.000 claims abstract description 8
- 239000004576 sand Substances 0.000 claims abstract description 7
- 239000004744 fabric Substances 0.000 claims description 27
- 238000005086 pumping Methods 0.000 claims description 2
- 238000009434 installation Methods 0.000 claims 1
- 239000012535 impurity Substances 0.000 description 12
- 238000010276 construction Methods 0.000 description 8
- 230000000903 blocking effect Effects 0.000 description 4
- 238000009412 basement excavation Methods 0.000 description 3
- 238000007596 consolidation process Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000001914 filtration Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 239000004575 stone Substances 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000012279 drainage procedure Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 235000020681 well water Nutrition 0.000 description 1
- 239000002349 well water Substances 0.000 description 1
Classifications
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/01—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements
- B01D29/05—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements supported
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/50—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with multiple filtering elements, characterised by their mutual disposition
- B01D29/56—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with multiple filtering elements, characterised by their mutual disposition in series connection
- B01D29/58—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with multiple filtering elements, characterised by their mutual disposition in series connection arranged concentrically or coaxially
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Hydrology & Water Resources (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Chemical & Material Sciences (AREA)
- Paleontology (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The invention discloses a kind of soft soil foundation base pit dewatering devices, it is located at the sump of foundation pit surrounding including several, steel pipe is arranged in sump, several holes are evenly distributed on steel pipe, sand gravel is filled between the inner wall of sump and the outer wall of steel pipe, the outer wall of steel pipe is also enclosed with geotextiles, and the bottom of close steel pipe is equipped with water pump in steel pipe inner chamber, the pump mouth of water pump is connected with drinking-water pipe, is vertically arranged with sliding slot on the steel pipe inner wall below drinking-water pipe；It is located at below drinking-water pipe in steel pipe and is provided with filter mechanism, including the first filter screen and the second filter screen being successively horizontally set in steel pipe from top to bottom, the symmetrical two sides of first filter frame pass through the first sliding block respectively and are connected with sliding slot, the symmetrical two sides of second filter frame pass through the second sliding block respectively and are connected with sliding slot, connecting rod is equipped between first sliding block and the second sliding block, the top level of sliding slot is equipped with the second lever, and elastic floating device is equipped between the top of the second sliding block and the second lever.
Description
Technical field
The present invention relates to base pit dewatering technical field of construction, specifically a kind of soft soil foundation base pit dewatering device.
Background technique
With developing on an unprecedented scale for China's geotechnical engineering, China's base pit engineering quantity is more and more, and scale is also increasing, base
The depth in hole also with and deepen, and complicated underground water geological conditions makes base pit dewatering rapidly growing, wherein soft soil foundation
In the construction of the excavation of foundation construction, supporting, especially plastic muck foundation, the water content of soil is higher, and soil property is soft, and construction is set
It is standby march into the arena after often sink into soil, influence construction speed.Soil consolidation is slow, water content is high, mobility is big, brings centainly to engineering
Security risk.After excavation of foundation pit is to certain depth, conventional method is to carry out pattern foundation pit supporting structure, to ground around construction site into
Row crater wall supporting, but often there is sediment failure, leakage even retaining structure bending deformation, influence the safety of field personnel
And construction speed；
And after excavation of foundation pit, since water-bearing layer is cut off, under differential pressure action, underground water can continuous seepage flow to foundation pit,
Take dewatering well draw water be guarantee that base plate of foundation pit is anti-prominent to gush stable effective ways, but due to dewatering device thick-layer sand with
Powder land floor control pipe well shakes out, and difficulty is big, and precipitation well water can be mixed with impurity and mud etc., what is drawn water by water pump
When, usually there is the case where impurity and mud blocking water pump chimney filter, easily causes water pump to leak electricity since blocking occurs, cause
Water pump damage, to influence drainage procedure.
Summary of the invention
To solve the above problems, the present invention provides a kind of soft soil foundation base pit dewatering device, base is arranged in the form of well point
Cheat surrounding, the water in foundation pit drained using water pump, accelerates soil consolidation speed, improves soil bearing capacity, with reach by construct into
Requirements of plan charge operation is spent, and reduces the damage to water pump such as impurity mud.
The present invention is achieved through the following technical solutions:
A kind of soft soil foundation base pit dewatering device, is located at the sump of foundation pit surrounding including several, in the sump
It is arranged with steel pipe, the bottom of the steel pipe and the bottom connection of sump touch, and the outer of sump is extended at the top of the steel pipe
Portion is evenly distributed with several holes on the steel pipe, fills grittiness between the inner wall of the sump and the outer wall of steel pipe
Stone, the outer wall of the steel pipe are also enclosed with geotextiles, and the bottom of close steel pipe is equipped with water pump, the water pump in the steel pipe inner chamber
Pump mouth be connected with drinking-water pipe.
Preferably, it is located in the steel pipe below drinking-water pipe and is provided with filter mechanism.
Preferably, the filter mechanism includes being located at below drinking-water pipe and being successively horizontally set on steel pipe from top to bottom
Interior the first filter screen and the second filter screen, first filter screen include the first filter frame and in the first filter frame
One screen cloth, second filter screen include the second filter frame and the second screen cloth in the second filter frame, first screen cloth
Aperture be greater than the second screen cloth aperture.
Preferably, it is vertically arranged on the steel pipe inner wall below drinking-water pipe fluted, sliding slot is provided in groove, it is described
The symmetrical two sides of first filter frame pass through the first sliding block respectively and are connected with sliding slot, the symmetrical two sides of second filter frame
It is connected respectively by the second sliding block with sliding slot, is vertically arranged with connecting rod between first sliding block and the second sliding block, it is described
The lower end of sliding slot is horizontally disposed the first lever, and the top level of the sliding slot is equipped with the second lever, the top of second sliding block
Elastic floating device is equipped between portion and the second lever.
Preferably, the elastic floating device includes the floating ball being fixedly connected at the top of the second sliding block, and the floating ball is remote
One end from the second sliding block is connect by spring with the second lever.
Preferably, the geotextiles are two layers.
Preferably, the diameter of the steel pipe is 0.25-0.30m.
Preferably, the diameter of described hole is the 1/10 of steel pipe nozzle diameter.
Preferably, the diameter of the sump is 1-1.02m.
Preferably, the depth of the sump is 5-5.5m.
The beneficial effects of the present invention are:
(1) steel pipe that the present invention is equipped with hole by being arranged with outer wall in sump, outer wall of steel pipe are enclosed with geotextiles,
And grains of sand stone is filled between steel pipe and sump, the water in sump is filtered, the water in foundation pit is drained by water pump,
Accelerate soil consolidation speed, soil bearing capacity is improved, to reach by construction schedule requirement charge operation；
(2) lower section of the drinking-water pipe of water pump of the present invention in steel pipe is equipped with filter mechanism, including the first filter screen and the
Two filter screens, and the symmetrical two sides of the first filter frame of the first filter screen are connected by the first sliding block with sliding slot, the second mistake
The symmetrical two sides of second filter frame of strainer are connected by the second sliding block with sliding slot, when the water level in steel pipe rises to second
When filter screen, floating ball drives the first filter screen and the second filter screen along sliding slot upward sliding, when the spring being connect with floating ball with
When second baffle is compressed to utmostly, greater than floating ball buoyancy when, drive the first filter screen and the second filter screen along sliding slot
Slide downward, when the first sliding block encounters the first lever, reversed elastic force drive again the first filter screen and the second filter screen along
Sliding slot upward sliding, repeatedly, so that the first filter screen and the second filter screen constantly stop impurity etc. across the first screen cloth
And second screen cloth, it avoids impurity etc. from entering in water pump, and reduce the attachment of impurity on the first screen cloth and the second screen cloth, slows down blocking
First screen cloth and the second screen cloth, increase its service life.
Detailed description of the invention
Fig. 1 is overall structure diagram of the invention；
Fig. 2 is the structural schematic diagram of steel pipe of the invention；
Fig. 3 is top view of the invention；
Fig. 4 is cross-sectional view of the invention；
Fig. 5 is the structural schematic diagram of filter layer and elastic floating device of the invention；
Appended drawing reference: 1, sump, 2, steel pipe, 3, hole, 4, geotextiles, 5, sand gravel, 6, water pump, 7, drinking-water pipe, 8,
Sliding slot, the 9, first filter screen, the 901, first filter frame, the 902, first screen cloth, the 10, second filter screen, the 1001, second filter frame,
1002, the second screen cloth, the 11, first sliding block, the 12, second sliding block, 13, connecting rod, the 14, first lever, the 15, second lever, 16, floating
Ball, 17, spring.
Specific embodiment
The present invention is further explained in the light of specific embodiments:
A kind of soft soil foundation base pit dewatering device is arranged in the sump 1 of foundation pit surrounding including several in the form of well point,
The diameter of the sump is 1.0m, depth 5.0m, is arranged with steel pipe 2 in the sump 1, the diameter of the steel pipe 2 is
25cm, the bottom of the steel pipe 2 and the bottom connection of sump 1 touch, and the top of the steel pipe 2 extends to the outside of sump 1,
Several holes 3 are evenly distributed on the steel pipe 2, the diameter of described hole 3 is the 1/10 of 2 nozzle diameter of steel pipe, the collection
Sand gravel 5, inner wall and steel pipe 2 of the sand gravel 5 in sump 1 are filled between the inner wall of well 1 and the outer wall of steel pipe 2
Radial thickness between outer wall is 35 cm, and the outer wall of the steel pipe 2 is also enclosed with geotextiles 4, and the geotextiles 4 are two layers, institute
It states in 2 inner cavity of steel pipe and is equipped with water pump 6 close to the bottom of steel pipe, the pump mouth of the water pump 6 is connected with drinking-water pipe 7, positioned at drawing water
It is vertically arranged fluted on the steel pipe inner wall of the lower section of pipe 7, sliding slot 8 is provided in groove, the water outlet of the water pump 6 is connected with row
Water pipe, the drainpipe are connected with header tank, can mitigate the pressure of water resource, the pumping by the water of filtering with Collection utilization
Water pipe 7 includes the water main that connect and be vertically arranged with pump mouth and be located at water main two sides and be connected with water main several
A branch water pipe increases the area that draws water, so that it is more efficient to draw water, on the water main outer wall above the branch water pipe of the top
Equipped with the through-hole for running through inner cavity, third filter screen is arranged in the nozzle of the drinking-water pipe 7, the third filter screen includes being used for
The bottom end of water main nozzle and the vertical end for filtering two sides branch water pipe Yu water main connectivity part are filtered, is further mitigated
The filter pressure of suction pump increases the service life of suction pump, and the two sides at the top of the third filter screen vertical end are horizontally disposed
Have an edge, the edge of the third filter screen is fixed in drinking-water pipe 7 by being fastened in the through-hole of drinking-water pipe, be not easy by
Water washes out.
2 inner cavity of steel pipe, which is located at below drinking-water pipe, is provided with filter mechanism, and the filter mechanism includes being located to take out
It is horizontally set below water pipe 7 and successively in 1 pipe of steel pipe from top to bottom
First filter screen 9 and the second filter screen 10, first filter screen 9 is including the first filter frame 901 and positioned at first
The first screen cloth 902 in filter frame, second filter screen 10 is including the second filter frame 1001 and in the second filter frame
Second screen cloth 1002, the aperture of first screen cloth 902 is greater than the aperture of the second screen cloth 1002, if the first filter screen 9 is only arranged
With the second filter screen 10, certain impurity can be intercepted, but with the lengthening of time, impurity can be attached to 9 He of the first filter screen
On second filter screen 10, mesh is blocked, and water flow from lower to upper, cannot be by most impurity from the first filter screen 9 when drawing water
It is washed away on the second filter screen 10；
The symmetrical two sides of first filter frame 901 pass through the first sliding block 11 respectively and are connected with sliding slot 8, and described second
The symmetrical two sides of filter frame 1001 pass through the second sliding block 12 respectively and are connected with sliding slot 8, and first sliding block 11 and second is sliding
Connecting rod 13 is vertically arranged between block 12, the lower end of the sliding slot 8 is horizontally disposed the first lever 14, the top of the sliding slot 8
End is horizontal to be equipped with the second lever 15, and elastic floating device, institute are equipped between the top of second sliding block 12 and the second lever 15
Stating elastic floating device includes the floating ball 16 being fixedly connected with the top of the second sliding block 12, and the floating ball 16 is far from the second sliding block
One end is connect by spring 17 with the second lever 15, and when the water level in steel pipe 2 rises to the second filter screen 10, floating ball 16 is driven
First filter screen 9 and the second filter screen 10 are along 8 upward sliding of sliding slot, when the spring 17 connecting with floating ball 16 and the second bar 15
When being compressed to utmostly, greater than floating ball 16 buoyancy when, drive the first filter screen 9 and the second filter screen 10 along sliding slot 8 to
Lower slider, when the first sliding block 11 encounters the first lever 14, reversed elastic force drives the first filter screen 9 and the second filter screen 10 again
Along 8 upward sliding of sliding slot, the continuous movement of the first filter screen 9 and the second filter screen 10, while band are not only driven repeatedly
Dynamic water (flow) direction ceaselessly converts, so that the first filter screen 9 and the second filter screen 10 constantly stop impurity etc. and pass through the first net
Cloth and the second screen cloth avoid impurity etc. from entering in water pump, and reduce the attached of impurity on the first screen cloth 902 and the second screen cloth 1002
, slow down the first screen cloth 902 of blocking and the second screen cloth 1002, increases its service life, the bottom end of first sliding block 11 can also
To be provided with floating ball, it is also equipped with spring between floating ball and the first lever 14, when buoyancy is greater than gravity, drives integral filter machine
Structure floats upwards, while pulling the spring elongation that connect with the first lever 14, when the spring elongation being connect with the first lever 14 extremely
When amplitude peak, when gravity is greater than the buoyancy of floating ball, integral filter mechanism is moved down, and compresses the bullet connecting with the first lever 14
Spring drives filter mechanism upward sliding when being compressed to the limit again.
The basic principles, main features and advantages of the invention have been shown and described above, and the technical staff of the industry should
Understand, the present invention is not limited to the above embodiments, and the above embodiments and description only describe originals of the invention
Reason, without departing from the spirit and scope of the present invention, various changes and improvements may be made to the invention, these changes and improvements
It all fall within the protetion scope of the claimed invention, the claimed scope of the invention is by appended claims and its equivalent circle
It is fixed.
Claims (6)
1. a kind of soft soil foundation base pit dewatering device, it is characterised in that: it is located at the sump (1) of foundation pit surrounding including several,
It is arranged with steel pipe (2) in the sump (1), the bottom of the steel pipe (2) and the bottom connection of sump (1) touch, the steel
The outside of sump (1) is extended at the top of pipe (2), is evenly distributed with several holes (3), the collection on the steel pipe (2)
Sand gravel (5) are filled between the inner wall of well (1) and the outer wall of steel pipe (2), the outer wall of the steel pipe (2) is also enclosed with geotechnique
Cloth (4), is equipped with water pump (6) close to the bottom of steel pipe in steel pipe (2) inner cavity, and the pump mouth of the water pump (6) is connected with pumping
Water pipe (7)；
It is located at below drinking-water pipe (7) in the steel pipe (2) and is provided with filter mechanism, the filter mechanism includes being located to draw water
The first filter screen (9) and the second filter screen (10) pipe (7) lower section and be successively horizontally set in steel pipe (2) pipe from top to bottom,
First filter screen (9) includes the first filter frame (901) and the first screen cloth (902) in the first filter frame, and described the
Two filter screens (10) include the second filter frame (1001) and the second screen cloth (1002) in the second filter frame, first net
The aperture of cloth (902) is greater than the aperture of the second screen cloth (1002)；
It is vertically arranged fluted, is provided in groove sliding slot (8), described first on the steel pipe inner wall below drinking-water pipe (7)
The symmetrical two sides of filter frame (901) pass through the first sliding block (11) respectively and are connected with sliding slot (8), second filter frame
(1001) symmetrical two sides pass through the second sliding block (12) respectively and are connected with sliding slot (8), first sliding block (11) and second
It is vertically arranged between sliding block (12) connecting rod (13), the lower end of the sliding slot (8) is horizontally disposed to be had the first lever (14), described
The top level of sliding slot (8) is equipped with the second lever (15), sets between the top and the second lever (15) of second sliding block (12)
Flexible floating installation；
The elastic floating device includes the floating ball (16) being fixedly connected at the top of the second sliding block (12), and the floating ball (16) is remote
One end from the second sliding block is connect by spring (17) with the second lever (15).
2. a kind of soft soil foundation base pit dewatering device according to claim 1, it is characterised in that: the geotextiles (4) are
Two layers.
3. a kind of soft soil foundation base pit dewatering device according to claim 1, it is characterised in that: the steel pipe (2) it is straight
Diameter is 0.25-0.30m.
4. a kind of soft soil foundation base pit dewatering device according to claim 1, it is characterised in that: described hole (3) it is straight
Diameter is the 1/10 of steel pipe (2) nozzle diameter.
5. a kind of soft soil foundation base pit dewatering device according to claim 1, it is characterised in that: the diameter of the sump
For 1-1.02m.
6. a kind of soft soil foundation base pit dewatering device according to claim 1, it is characterised in that: the depth of the sump
For 5-5.5m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810186920.5A CN108286259B (en) | 2018-03-07 | 2018-03-07 | A kind of soft soil foundation base pit dewatering device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810186920.5A CN108286259B (en) | 2018-03-07 | 2018-03-07 | A kind of soft soil foundation base pit dewatering device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108286259A CN108286259A (en) | 2018-07-17 |
| CN108286259B true CN108286259B (en) | 2019-10-25 |
Family
ID=62833247
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810186920.5A Active CN108286259B (en) | 2018-03-07 | 2018-03-07 | A kind of soft soil foundation base pit dewatering device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108286259B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111254960B (en) * | 2020-02-17 | 2021-02-19 | 盐城笃诚建设有限公司 | Device for treating precipitation in foundation pit |
| CN112459097B (en) * | 2020-11-14 | 2022-06-24 | 湖南恒邦建工有限公司 | Be used for deep sand type soil deep basal pit excavation water level control device |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0813465A (en) * | 1994-06-29 | 1996-01-16 | Nittoc Constr Co Ltd | Drainage boring method |
| CN204000909U (en) * | 2014-05-27 | 2014-12-10 | 江苏南通三建集团有限公司 | A kind of immersed tube Precipitation Structure |
| CN205242416U (en) * | 2015-12-17 | 2016-05-18 | 江苏建筑职业技术学院 | Downcomer filter equipment |
| CN205954646U (en) * | 2016-06-21 | 2017-02-15 | 中国水利水电第五工程局有限公司 | Deep basal pit excavation precipitation device |
| CN206599786U (en) * | 2017-03-17 | 2017-10-31 | 北京鑫大禹水利建筑工程有限公司 | A kind of construction drainage of foundation pit device |
| CN206873476U (en) * | 2017-03-30 | 2018-01-12 | 袁道华 | A kind of construction Precipitation Structure |
-
2018
- 2018-03-07 CN CN201810186920.5A patent/CN108286259B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0813465A (en) * | 1994-06-29 | 1996-01-16 | Nittoc Constr Co Ltd | Drainage boring method |
| CN204000909U (en) * | 2014-05-27 | 2014-12-10 | 江苏南通三建集团有限公司 | A kind of immersed tube Precipitation Structure |
| CN205242416U (en) * | 2015-12-17 | 2016-05-18 | 江苏建筑职业技术学院 | Downcomer filter equipment |
| CN205954646U (en) * | 2016-06-21 | 2017-02-15 | 中国水利水电第五工程局有限公司 | Deep basal pit excavation precipitation device |
| CN206599786U (en) * | 2017-03-17 | 2017-10-31 | 北京鑫大禹水利建筑工程有限公司 | A kind of construction drainage of foundation pit device |
| CN206873476U (en) * | 2017-03-30 | 2018-01-12 | 袁道华 | A kind of construction Precipitation Structure |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108286259A (en) | 2018-07-17 |
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