CN112195946A - Filtering type foundation pit local dewatering device and using method thereof - Google Patents
Filtering type foundation pit local dewatering device and using method thereof Download PDFInfo
- Publication number
- CN112195946A CN112195946A CN202011198227.3A CN202011198227A CN112195946A CN 112195946 A CN112195946 A CN 112195946A CN 202011198227 A CN202011198227 A CN 202011198227A CN 112195946 A CN112195946 A CN 112195946A
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- Prior art keywords
- skeleton
- steel wire
- framework
- wire mesh
- water pump
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- 238000001914 filtration Methods 0.000 title claims abstract description 30
- 238000000034 method Methods 0.000 title claims abstract description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 56
- 238000009412 basement excavation Methods 0.000 claims abstract description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 45
- 239000010959 steel Substances 0.000 claims description 45
- 239000004744 fabric Substances 0.000 claims description 21
- 238000001556 precipitation Methods 0.000 claims description 9
- 238000005086 pumping Methods 0.000 claims description 6
- 230000008595 infiltration Effects 0.000 claims 2
- 238000001764 infiltration Methods 0.000 claims 2
- 238000010276 construction Methods 0.000 abstract description 5
- 238000001035 drying Methods 0.000 abstract description 2
- 101150054854 POU1F1 gene Proteins 0.000 description 4
- 239000004576 sand Substances 0.000 description 4
- 239000012535 impurity Substances 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 102000001999 Transcription Factor Pit-1 Human genes 0.000 description 1
- 108010040742 Transcription Factor Pit-1 Proteins 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
Images
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
- B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
- B01D35/02—Filters adapted for location in special places, e.g. pipe-lines, pumps, stop-cocks
- B01D35/027—Filters adapted for location in special places, e.g. pipe-lines, pumps, stop-cocks rigidly mounted in or on tanks or reservoirs
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/02—Foundation pits
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Hydrology & Water Resources (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
- Filtration Of Liquid (AREA)
Abstract
The invention relates to the field of drying for keeping underground foundation sections or other areas by reducing underground water level, in particular to a filtering type foundation pit local dewatering device and a using method thereof. The utility model provides a local dewatering device of filtration formula foundation ditch, includes foundation ditch (1), the bottom excavation basin (2) of foundation ditch (1), characterized by: still include skeleton (3), filter screen (4) and water pump (5), skeleton (3) are the cuboid frame, and in basin (2) was located in skeleton (3), paste respectively on two relative sides of skeleton (3) and cover filter screen (4), and the mouth that draws water of water pump (5) was located in skeleton (3). A use method of a filtering type foundation pit local dewatering device is characterized by comprising the following steps: the method is implemented in sequence according to the following steps: placing; and ② dewatering. The invention has simple construction, safety and reliability.
Description
Technical Field
The invention relates to the field of drying for keeping underground foundation sections or other areas by reducing underground water level, in particular to a filtering type foundation pit local dewatering device and a using method thereof.
Background
The foundation pit dewatering refers to dewatering work performed for ensuring that the foundation pit can be constructed under a dry condition and preventing slope instability, foundation quicksand, pit bottom uplift, pit bottom piping and foundation bearing capacity reduction when the underground water level is higher than the excavation bottom surface when the foundation pit is excavated.
During actual construction, when adopting big well point dewatering measure, if the foundation ditch structure is silt bed, the foundation ditch will be excavated the foundation ditch bottom and can appear gushing water, gushing sand the condition when accomplishing when the foundation ditch, causes huge hidden danger to foundation ditch side slope stability, if increase precipitation well again, the technical degree of difficulty is big, and economic benefits is poor.
Disclosure of Invention
The invention discloses a filtering type foundation pit local dewatering device and a using method thereof, and aims to overcome the defects of the prior art and provide a drainage device which is simple and convenient to construct, safe and reliable.
The invention achieves the purpose by the following technical scheme:
the utility model provides a local dewatering device of filtration formula foundation ditch, includes the foundation ditch, the bottom excavation basin of foundation ditch, characterized by: still include skeleton, filter screen and water pump, the skeleton is the cuboid frame, and the cross section of skeleton and the cross section of basin form clearance fit, and in the basin was located to the skeleton, paste respectively on two relative sides of skeleton and cover the filter screen, the filter screen includes inlayer wire net, outer wire net and filter cloth, and the filter cloth presss from both sides between inlayer wire net and outer wire net, and the filter screen pastes on the side of covering the skeleton with the inlayer wire net, and the mouth that draws water of water pump is located in the skeleton.
Local dewatering device of filtration formula foundation ditch, characterized by: the side length of the filtering holes of the inner steel wire mesh and the outer steel wire mesh is not more than 15mm, and the aperture of the filtering holes of the filter cloth is not more than 1.5 mm.
The use method of the filtering type foundation pit local dewatering device is characterized by comprising the following steps: the method is implemented in sequence according to the following steps:
placing: the method comprises the following steps of (1) excavating a water tank at the bottom of a foundation pit (1), welding a framework of a cuboid framework by using steel bars, steel pipes or steel rods, forming clearance fit between the cross section of the framework and the cross section of the water tank, respectively attaching filter screens to two opposite side surfaces of the framework, wherein each filter screen comprises an inner steel wire mesh, an outer steel wire mesh and filter cloth, the filter cloth is clamped between the inner steel wire mesh and the outer steel wire mesh, the filter screens are attached to the side surfaces of the framework by the inner steel wire meshes, arranging the framework in the water tank, and arranging a water pumping port of a water pump in the framework;
dewatering: the water pump is started, the water pump pumps out the water flowing into the water tank from the foundation pit and permeating into the framework and discharges out of the foundation pit, the water in the foundation pit is filtered by the outer steel wire mesh, the filter cloth and the inner steel wire mesh in sequence when permeating into the framework, impurities are prevented from entering the framework, and the water pump is prevented from pumping in the impurities.
The use method of the filtering type foundation pit local dewatering device is characterized by comprising the following steps: in the first step, the side lengths of the filtering holes of the inner layer steel wire mesh and the outer layer steel wire mesh are not more than 15mm, and the aperture of the filtering holes of the filter cloth is not more than 1.5 mm.
The invention solves the problem of local sand gushing and water gushing of the foundation pit, prevents building garbage residues and silt from entering the drainage pit in the precipitation process, and facilitates the precipitation of the foundation pit.
The invention has the following beneficial effects:
1. various raw materials are easy to obtain in a construction site, the manufacturing process is simple, the construction is simple and convenient, and the device can be taken out for repeated use after the construction is finished;
2. the effect of treating gushing water and sand is good;
3. the maintenance cost of the water pump can be reduced in the precipitation process;
4. the material can be recycled, and the repeated utilization rate is high.
Drawings
Figure 1 is a schematic view of the structure of the present invention,
FIG. 2 is a schematic view of the skeleton of the present invention,
fig. 3 is a schematic diagram of the assembly of the filter screen of the present invention.
Detailed Description
The invention is further illustrated by the following specific examples.
Example 1
A geological structure of a certain project at the elevation position of an elevator foundation pit is a silt layer, a dewatering measure is large well point dewatering, and the conditions of water gushing and sand gushing are found at the bottom of a foundation trench when the elevator foundation trench is about to be excavated, so that huge hidden danger is caused to the stability of a foundation pit side slope. Through comprehensive consideration, open ditches are adopted for drainage, but in the drainage process, sandy soil can fill the water collecting ditches quickly, and meanwhile, the water pump is easily buried by the sandy soil, so that the water pump is damaged.
Now adopt filtration formula foundation ditch local precipitation device, a filtration formula foundation ditch local precipitation device, including foundation ditch 1, skeleton 3, filter screen 4 and water pump 5, as shown in fig. 1 ~ 3, concrete structure is:
a water tank 2 is excavated at the bottom of the foundation pit 1;
the framework 3 is shown in figure 2: skeleton 3 is the cuboid frame, and skeleton 3's cross section and basin 2's cross section form clearance fit, and in basin 2 was located to skeleton 3, filter screen 4 was covered in pasting respectively on two relative sides of skeleton 3, and filter screen 4 is as shown in fig. 3: the filter screen 4 comprises an inner steel wire mesh 41, an outer steel wire mesh 42 and a filter cloth 43, the filter cloth 43 is clamped between the inner steel wire mesh 41 and the outer steel wire mesh 42, the filter screen 4 is attached to the side face of the framework 3 through the inner steel wire mesh 41, and a water pumping port of the water pump 5 is arranged in the framework 3.
In this embodiment: the side lengths of the filter holes of the inner steel wire mesh 41 and the outer steel wire mesh 42 are not more than 15mm, and the aperture of the filter hole of the filter cloth 43 is not more than 1.5mm (about not less than 12 meshes in terms of meshes).
When the method is used, the steps are implemented in sequence as follows:
placing: the method comprises the following steps of excavating a water tank 2 at the bottom of a foundation pit 1, welding a framework 3 of a cuboid framework by using steel bars, steel pipes or steel rods, enabling the cross section of the framework 3 to be in clearance fit with the cross section of the water tank 2, respectively attaching filter screens 4 to two opposite side surfaces of the framework 3, enabling the filter screens 4 to comprise inner steel wire meshes 41, outer steel wire meshes 42 and filter cloth 43, enabling the filter cloth 43 to be clamped between the inner steel wire meshes 41 and the outer steel wire meshes 42, attaching the inner steel wire meshes 41 to the filter screens 4 to the side surfaces of the framework 3, arranging the framework 3 in the water tank 2, and arranging a water pumping port of a water pump 5 in the framework;
the side lengths of the filtering holes of the inner steel wire mesh 41 and the outer steel wire mesh 42 are not more than 15mm, and the aperture of the filtering hole of the filtering cloth 43 is not more than 1.5mm (about not less than 12 meshes in terms of meshes);
dewatering: the water pump 5 is started, the water pump 5 pumps water flowing into the water tank 2 from the foundation pit 1 along the directions of arrows a, b and c in the figure 1 and permeating into the framework 3 out of the foundation pit 1, and the water in the foundation pit 2 is filtered by the outer steel wire mesh 42, the filter cloth 43 and the inner steel wire mesh 4 when permeating into the framework 3 in sequence, so that sundries are prevented from entering the framework, and the water pump 5 is prevented from pumping the sundries.
Claims (4)
1. The utility model provides a local dewatering device of filtration formula foundation ditch, includes foundation ditch (1), the bottom excavation basin (2) of foundation ditch (1), characterized by: still include skeleton (3), filter screen (4) and water pump (5), skeleton (3) are the cuboid frame, the cross section of skeleton (3) and the cross section of basin (2) form clearance fit, basin (2) are located in skeleton (3), paste respectively on two relative sides of skeleton (3) and cover filter screen (4), filter screen (4) include inlayer wire net (41), outer wire net (42) and filter cloth (43), filter cloth (43) clamp is between inlayer wire net (41) and outer wire net (42), filter screen (4) are pasted on the side of covering skeleton (3) with inlayer wire net (41), the mouth that draws water of water pump (5) is located in skeleton (3).
2. The filtering type foundation pit local precipitation device of claim 1, wherein: the side lengths of the filtering holes of the inner layer steel wire mesh (41) and the outer layer steel wire mesh (42) are not more than 15mm, and the aperture of the filtering holes of the filtering cloth (43) is not more than 1.5 mm.
3. The use method of the filtering type foundation pit local precipitation device as claimed in claim 1 or 2, is characterized in that: the method is implemented in sequence according to the following steps:
placing: the water tank (2) is excavated at the bottom of the foundation pit (1), steel bars, steel pipes or steel bars are welded into a framework (3) of a cuboid frame, the cross section of the framework (3) and the cross section of the water tank (2) form clearance fit, filter screens (4) are respectively attached to two opposite side faces of the framework (3), each filter screen (4) comprises an inner steel wire mesh (41), an outer steel wire mesh (42) and filter cloth (43), the filter cloth (43) is clamped between the inner steel wire mesh (41) and the outer steel wire mesh (42), the filter screens (4) are attached to the side faces of the framework (3) through the inner steel wire meshes (41), the framework (3) is arranged in the water tank (2), and a water pumping port of a water pump (5) is arranged in the framework (3);
dewatering: starting the water pump (5), the water pump (5) is to be taken out and discharge outside foundation ditch (1) from the water tank (2) of foundation ditch (1) inflow and infiltration skeleton (3), and the water of foundation ditch (2) filters through outer wire net (42), filter cloth (43) and inlayer wire net (4) in proper order when infiltration skeleton (3), prevents debris entering skeleton, avoids water pump (5) suction debris.
4. The use method of the filtering type foundation pit local precipitation device as claimed in claim 3, is characterized in that: in the first step, the side lengths of the filtering holes of the inner layer steel wire mesh (41) and the outer layer steel wire mesh (42) are not more than 15mm, and the aperture of the filtering holes of the filtering cloth (43) is not more than 1.5 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011198227.3A CN112195946A (en) | 2020-10-30 | 2020-10-30 | Filtering type foundation pit local dewatering device and using method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011198227.3A CN112195946A (en) | 2020-10-30 | 2020-10-30 | Filtering type foundation pit local dewatering device and using method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112195946A true CN112195946A (en) | 2021-01-08 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011198227.3A Pending CN112195946A (en) | 2020-10-30 | 2020-10-30 | Filtering type foundation pit local dewatering device and using method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112195946A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115162386A (en) * | 2022-06-21 | 2022-10-11 | 中国五冶集团有限公司 | Assembly type open drain pit structure capable of effectively reducing precipitation sand content |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203429653U (en) * | 2013-09-02 | 2014-02-12 | 广州市第二建筑工程有限公司 | Dewatering well with geotextile steel reinforcement cage |
| CN206956754U (en) * | 2017-06-29 | 2018-02-02 | 中铁十六局集团城市建设发展有限公司 | A kind of easy device for foundation ditch local dewatering |
-
2020
- 2020-10-30 CN CN202011198227.3A patent/CN112195946A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203429653U (en) * | 2013-09-02 | 2014-02-12 | 广州市第二建筑工程有限公司 | Dewatering well with geotextile steel reinforcement cage |
| CN206956754U (en) * | 2017-06-29 | 2018-02-02 | 中铁十六局集团城市建设发展有限公司 | A kind of easy device for foundation ditch local dewatering |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115162386A (en) * | 2022-06-21 | 2022-10-11 | 中国五冶集团有限公司 | Assembly type open drain pit structure capable of effectively reducing precipitation sand content |
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Application publication date: 20210108 |