CN211036962U - Underground continuous wall with pit-facing surface and dewatering function - Google Patents
Underground continuous wall with pit-facing surface and dewatering function Download PDFInfo
- Publication number
- CN211036962U CN211036962U CN201921272342.3U CN201921272342U CN211036962U CN 211036962 U CN211036962 U CN 211036962U CN 201921272342 U CN201921272342 U CN 201921272342U CN 211036962 U CN211036962 U CN 211036962U
- Authority
- CN
- China
- Prior art keywords
- storage tank
- continuous wall
- underground continuous
- water
- water storage
- 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.)
- Expired - Fee Related
Links
Images
Landscapes
- Underground Structures, Protecting, Testing And Restoring Foundations (AREA)
Abstract
The utility model discloses a meet underground continuous wall that pitted face has precipitation function concurrently, including steel reinforcement cage, pipe and storage water tank, the pipe is vertical setting and buries underground in steel reinforcement cage's inside, and the top of pipe stretches out from steel reinforcement cage's top, and the storage water tank is fixed in steel reinforcement cage's the lower part of meeting the pitted face, and the storage water tank links to each other with the bottom of pipe, and the storage water tank constitutes confined intercommunication system with the pipe, and the face of meeting the soil of storage water tank is provided with a plurality of inlet openings respectively, and the steel reinforcement cage is put into in the slot and is formed with cast-in-place reinforced concrete wall through the mode of concreting. The utility model discloses a storage water tank prefabricates in advance, buries underground in underground continuous wall and meets pitted face lower part underground, and storage water tank (precipitation well) can drop into to use when the construction finishes, so the foundation ditch engineering inboard need not to set up traditional precipitation well again, has saved precipitation well's time limit for a project and cost greatly.
Description
Technical Field
The utility model relates to an underground continuous wall field for building engineering specifically is an underground continuous wall who meets pitted surface and has precipitation function concurrently.
Background
With the rapid development of urban underground space development in China, subway systems, high-rise building basements, underground stations, sponge city construction and the like with large scale face deep foundation pit engineering, underground continuous walls become common structures for urban deep underground space development, mainly embodied as that the underground continuous walls can be used as temporary supporting structures and permanent structures, and the advantages are proved in the process of urban underground space development. The underground continuous wall has the functions of water interception, seepage prevention, bearing, water retaining and the like, has good integrity, high construction speed, small construction vibration and high wall rigidity, is suitable for construction in dense building groups and the like, is concerned about and is widely applied.
Traditional underground continuous wall has good water-stopping, prevention of seepage function, and when traditional underground continuous wall bottom embedding water barrier, the unable infiltration of underground water gets into inside the foundation ditch around the foundation ditch engineering, only needs to set up traditional precipitation well (pipe well point precipitation) in the foundation ditch inboard this moment, falls the inboard underground water level of foundation ditch below the bottom plate, as shown in figure 1.
When the well point is constructed, a plurality of steps such as drilling by a drilling machine, cleaning holes, hoisting and releasing well pipes, filling filter materials, washing wells, installing water pumps and the like need to be carried out, and after the well point is used, the well pipes need to be pulled out and the wells need to be sealed. A large-scale foundation pit project usually needs to be provided with a large number of dewatering wells, the overall cost is high, and the construction site is occupied.
The utility model discloses the problem of paying attention to does: in the foundation pit engineering that adopts underground continuous wall to strut, during underground continuous wall bottom embedding water barrier, inside the unable infiltration of outside groundwater of foundation pit got into the foundation pit, the well point dewatering was carried out to the groundwater in the inboard aquifer of foundation pit to the novel dewatering well of proposing to launch, made it can satisfy the relevant requirement of dewatering, had characteristics simple and convenient, that the cost is low again of construction.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the purpose is exactly in order to compensate prior art's defect, provides an underground continuous wall who meets the pitted surface and have precipitation function concurrently, and storage water tank (precipitation well) is prefabricated, bury underground in steel reinforcement cage meet pitted surface lower part, and storage water tank (precipitation well) can come into operation when the construction finishes, need not to set up traditional precipitation well alone again, has the characteristics that the construction is simple, the cost is low.
In order to achieve the above purpose, the utility model discloses the technical scheme who adopts is:
the utility model provides a meet underground continuous wall of pitted surface with precipitation function which characterized in that: the water storage tank is fixed at the lower part of the face, facing the pit, of the steel reinforcement cage, is connected with the bottom of the circular pipe, forms a closed communication system with the circular pipe, is provided with a plurality of water inlet holes on the face, facing the soil, of the water storage tank, and is placed in a groove to form a cast-in-place reinforced concrete wall body in a concrete pouring mode to form an underground continuous wall; the underground water enters the water storage tank through the water inlet holes, is stored in the water storage tank and is pumped out of the ground surface by the submersible pump arranged in the bottom of the circular tube and is discharged.
The underground continuous wall with the pit-facing surface having the function of dewatering is characterized in that: the thickness of the water storage tank is not more than half of that of the steel reinforcement cage, and the bottom surface of the water storage tank is in an arc shape.
The underground continuous wall with the pit-facing surface having the function of dewatering is characterized in that: the opening rate of the plurality of water inlet holes is not less than 50%; and a plurality of layers of filter screens with different pore diameters are bound at the outer sides of the water inlet holes.
The underground continuous wall with the pit-facing surface having the function of dewatering is characterized in that: the soil facing surface of the water storage tank is fixed with a circle of rubber surrounding barrier around the water inlet holes, and the height of the rubber surrounding barrier from the soil facing surface of the water storage tank is slightly larger than the gap between the reinforcement cage and the groove.
The underground continuous wall with the pit-facing surface having the function of dewatering is characterized in that: the water storage tank is made of steel or plastics, and the water storage tank has enough strength and rigidity, so that the water storage tank is not cracked and fails under the action of construction load and soil pressure.
Compared with the prior art, the utility model has the advantages of it is following:
1. the utility model discloses a storage water tank prefabricates in advance, buries underground in the lower part that the steel reinforcement cage met the hole face, buries underground promptly, and storage water tank (precipitation well) can be used into when the construction is finished, so the foundation ditch engineering inboard need not to set up traditional precipitation well again, has saved the construction period and the cost of precipitation well greatly, and the practicality is strong.
2. When the traditional dewatering well is used for reducing the underground water level in the foundation pit, the dewatering well is positioned on the inner side of the foundation pit, occupies construction space, has interference and influence on construction of other work types, and needs to be plugged after use; and the utility model discloses the storage water tank (precipitation well) that adopts do not occupy the construction space in arranging underground continuous wall in, if do not have special requirement after the use can not carry out the shutoff.
3. The utility model discloses the drainage well of constituteing by storage water tank and pipe both can be used to draw water and step down, also can regard as ground water level observation hole to use.
Drawings
FIG. 1 is a schematic diagram of well point dewatering inside a common foundation pit.
Fig. 2 is the three-dimensional structure schematic diagram of the steel reinforcement cage of the utility model.
Fig. 3 is a schematic view of a three-dimensional structure of the middle water storage tank of the present invention.
Fig. 4 is a schematic diagram of a three-dimensional structure of the middle water storage tank of the present invention.
Fig. 5 is a schematic three-dimensional structure diagram of the water storage tank with the hidden rubber enclosure.
Fig. 6 is a schematic diagram of the three-dimensional structure of the present invention.
Fig. 7 is a schematic structural view of the middle groove of the present invention.
Fig. 8 is the schematic view of the steel reinforcement cage hoisting device of the present invention.
Fig. 9 is the utility model discloses concreting schematic diagram.
Fig. 10 is a schematic view of the present invention.
Description of reference numerals: 1. traditional underground diaphragm walls; 2. a traditional dewatering well; 3. infiltrating the line after precipitation; 4. a reinforcement cage; 5. a water storage tank; 6. a plurality of water inlet holes; 7. a circular tube; 8. a rubber enclosure; 9. casting a reinforced concrete wall in situ; 10. a trench; A. an aqueous layer; B. a water barrier layer; the arrows in the figure indicate the direction of movement of the pumped water stream.
Detailed Description
Referring to the drawings:
during 1 embedding water barrier B of traditional underground continuous wall, traditional underground continuous wall 1 has blockked the outside groundwater of foundation ditch and to the inside infiltration of foundation ditch, only need to draw water to the foundation ditch inboard reduce the water level can, foundation ditch outside groundwater does not have the influence to the foundation ditch excavation. At present, the common practice is to arrange a traditional dewatering well 2 at the inner side of a foundation pit to reduce the underground water level in the pit, as shown in figure 1.
An underground continuous wall with a pit facing surface and a precipitation function comprises a steel reinforcement cage 4, a round pipe 7 and a water storage tank 5, wherein the round pipe 7 is vertically arranged and embedded inside the steel reinforcement cage 4, the top of the round pipe 7 extends out of the top of the steel reinforcement cage 4, the water storage tank 5 is fixed at the lower part of the pit facing surface of the steel reinforcement cage 4, the water storage tank 5 is connected with the bottom of the round pipe 7, the water storage tank 5 and the round pipe 7 form a closed communication system, the soil facing surface of the water storage tank 5 is respectively provided with a plurality of water inlet holes 6, the steel reinforcement cage 4 is placed in a groove 10 and forms a cast-in-place reinforced concrete wall body 9 in a concrete pouring mode, and the underground continuous wall is formed; the groundwater enters and is stored in the water storage tank 5 through a plurality of water inlet holes 6, and then is pumped out of the ground surface and discharged by a submersible pump arranged in the bottom of the circular tube 7.
The side of the foundation pit excavated by the foundation pit earth facing the pit surface is mentioned above. The above-mentioned terms of orientation such as "lower", "inner", "vertical", "bottom", "upper" and the like are determined based on the attitude of the underground diaphragm wall during construction. During construction, the reinforcement cage 4 is suspended above the groove 10 and is in a plumb state, as shown in fig. 8 to 10. In this posture, the specific direction of each directional word is determined, and directional words mentioned elsewhere in the specification are also estimated according to this posture. The above-mentioned orientations or positional relationships are based on the orientations or positional relationships shown in the drawings and are only for convenience of description, but do not indicate or imply that the device or member referred to must have a specific orientation, configuration and operation, and therefore, should not be construed as limiting the present invention.
The thickness of storage water tank 5 is not more than half of the thickness of steel reinforcement cage 4, as shown in fig. 2, on the one hand make during cast-in-place construction concrete can effectual penetration in the steel reinforcement cage 4 of storage water tank 5 lower part and can realize effective vibration, on the other hand make underground continuous wall wholly have sufficient intensity, can not form obvious weak layer of intensity in storage water tank 5 department.
The bottom surface of the water storage tank 5 is arc-shaped, as shown in fig. 3 to 5, the arc-shaped is convenient for the concrete at the lower part to flow upwards, and the impact force on the water storage tank 5 is small.
The height of the water storage tank 5 is larger than that of the submersible pump, so that when the submersible pump enters the water storage tank 5 based on the round pipe 7, the water inlet of the submersible pump is positioned in the water storage tank 5.
The opening rate of the water inlet holes 6 is not less than 50%; the outer sides of the water inlet holes 6 are bound with a plurality of layers of filter screens with different aperture sizes, so that the soil with large particle sizes can be prevented from entering the water storage tank 5 through the water inlet holes 6; the submersible pump arranged in the bottom of the circular tube 7 can extract the underground water stored in the water storage tank 5 to the ground surface and discharge the underground water; the open area ratio refers to the ratio of the area of a plurality of water inlets 6 on the soil facing surface of the water storage tank 5 to the surface area of the soil facing surface.
The face that faces the earth of storage water tank 5 is fixed with the round rubber all around a plurality of inlet openings 6 and encloses fender 8, and the height that 8 is enclosed to fender 8 apart from the storage water tank 5 face that faces the earth slightly is greater than the clearance between steel reinforcement cage 4 and the slot 10, and the rubber encloses the inside that keeps off 8 can prevent that the concrete from invading storage water tank 5 when concreting, and the rubber encloses fender 8 and is elastic deformation under the load effect.
The water storage tank 5 is made of steel or plastic, and the water storage tank 5 has enough strength and rigidity, so that the water storage tank does not crack or lose efficacy under the action of construction load and soil pressure.
The water storage tank 5 and the round pipe 7 form a communicated drainage system. Because the water storage tank 5 is prefabricated, various known auxiliary measures can be adopted to ensure the effectiveness of a drainage system and ensure that the drainage capacity meets the drainage design requirement. The water storage tank 5 and the round pipe 7 are prefabricated on the ground, and the construction quality is controllable, so that the drainage performance of the water storage tank meets the requirements.
The water storage tank 5 is prefabricated at the lower part of the face, facing the pit, of the reinforcement cage 4, as shown in fig. 2. The underground continuous wall after construction is shown in fig. 6, and comprises a water storage tank 5 positioned at the lower part of the pit-facing surface and a cast-in-place ordinary reinforced concrete wall body 9 at the rest part.
During design, the position of the water storage tank 5 should be accurately determined so that the water storage tank is located above the water-resisting layer B and in the aquifer a at the bottom of the foundation pit, that is, it is required to ensure that the water storage tank 5 is located in the aquifer a at the bottom of the inner side of the foundation pit after construction is finished, as shown in fig. 10. The groundwater in the aquifer A permeates into the water storage tank 5, is stored in the water storage tank, and is pumped and discharged by the submersible pump.
The circular pipe 7 corresponds to a well pipe of a conventional dewatering well, and may be made of a plastic pipe or a steel pipe. The circular tube 7 should have a sufficient inner diameter to allow the submersible pump to sink inside the water storage tank 5 based on the hole of the circular tube 7. The submersible pump is connected with a water belt, and the submersible pump is started to extract the underground water permeating into the water storage tank 5 to the ground surface for discharge. After the precipitation is finished, the submersible pump can be lifted away and removed from the circular tube 7 without pulling out the circular tube 7.
The utility model discloses a construction method, briefly introduce as follows:
(1) leveling the field, surveying and setting out, pouring a guide wall, and excavating a groove 10 as shown in fig. 7.
(2) Manufacturing a reinforcement cage 4 in advance, fixing a water storage tank 5 at the lower part of the face, facing the pit, of the reinforcement cage 4, and forming an intercommunicated drainage system by the water storage tank 5 and a circular pipe 7, as shown in fig. 2-5; the reinforcement cage 4 is lifted into the trench 10 with the side with the storage tank 5 inside the foundation pit, as shown in fig. 8.
The water storage tank 5 and the round pipe 7 which are additionally arranged inside the steel reinforcement cage 4 are small in total weight, and the hoisting construction of the steel reinforcement cage 4 cannot be influenced.
During design, the water storage tank 5 is ensured to be positioned above the water-resisting layer B and in the water-containing layer A at the bottom of the foundation pit.
(3) And concrete is poured to form the underground continuous wall, and the rest parts except the water storage tank 5 are cast-in-place reinforced concrete walls 9, as shown in figure 9.
In the process of pouring concrete, partial concrete is not discharged to enter the plurality of water inlet holes 6 of the water storage tank 5 through the rubber enclosure 8, and the plurality of water inlet holes 6 can be blocked. Therefore, before the initial setting of concrete, the water storage tank 5 can be inflated intermittently and periodically based on the round pipe 7, the concrete which is not solidified at the positions of the water inlet holes 6 is dredged and removed by gas, the water inlet holes 6 cannot be plugged, and the water permeating function of the water inlet holes 6 is prevented from being lost.
(4) And during the excavation construction of the foundation pit, underground water can be gradually pumped based on the submersible pump arranged at the bottom of the circular tube 7. When the foundation pit is excavated to the designed elevation, the underground water is lowered to the designed water level based on the precipitation well in the underground continuous wall, and the finally formed precipitation post-infiltration line 3 meets the construction requirements, as shown in fig. 10.
Because underground continuous wall embedding water barrier B, underground continuous wall has blockked the outside groundwater of foundation ditch and has permeated to the inside of foundation ditch, so only need to draw water to the foundation ditch inboard and reduce the water level can, and set up the pumping system in the inboard bottom storage water tank 5 of foundation ditch can extract the groundwater of foundation ditch inside and drain away.
Generally, a certain number of dewatering wells are uniformly distributed around the foundation pit according to a design scheme. The underground continuous wall provided with the water storage tank 5 is adopted at the position where the dewatering well is designed and arranged, so that the dewatering well is arranged inside the underground continuous wall. And in the position where the dewatering well is not arranged, the traditional cast-in-place reinforced concrete underground continuous wall is still adopted. Therefore, the dewatering wells are not needed to be arranged on the underground continuous walls of all the unit groove sections, and the dewatering wells are only reasonably arranged according to needs.
The water storage tank 5 is prefabricated in advance and is buried at the lower part of the inner side of the underground continuous wall, and the water storage tank 5 (dewatering well) buried at the bottom of the inner side of the underground continuous wall can be put into use after the construction of the underground continuous wall is finished, so that the traditional dewatering well does not need to be arranged at the inner side of the foundation pit engineering, the construction period and the construction cost of the dewatering well are greatly saved, and the practicability is high; when the traditional dewatering well is used for reducing the underground water level in the foundation pit, the dewatering well is positioned on the inner side of the foundation pit, occupies construction space, has interference and influence on construction of other work types, and needs to be plugged after use; the water storage tank 5 (dewatering well) of the utility model is arranged in the underground continuous wall, which does not occupy the construction space and can not be plugged if no special requirements are required after the use; the drainage well composed of the water storage tank 5 and the circular tube 7 can be used for pumping water and reducing pressure and can also be used as an underground water level observation hole.
Only show in the attached drawing and met the partial shape and the partial connected mode of the underground continuous wall that the pithead face has the precipitation function concurrently, according to the thinking that puts forward, can change the shape of each component (storage water tank, pipe), each partial connected mode, form the underground continuous wall that the pithead face of other relevant types has the precipitation function concurrently, it all belongs to the utility model discloses an equivalent modification and change, no longer give consideration to here again.
The drawings are for illustrative purposes only and are not to be construed as limiting the invention; for the purpose of better illustrating the embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted; the same or similar reference numerals correspond to the same or similar parts; the terms describing the positional relationship in the drawings are for illustrative purposes only and are not to be construed as limiting the present invention.
The present invention is not limited to the above-mentioned embodiments, and according to the above-mentioned contents, according to the common technical knowledge and conventional means in the field, without departing from the basic technical idea of the present invention, the present invention can also make other equivalent modifications, replacements or changes in various forms, all falling within the protection scope of the present invention.
Claims (5)
1. The utility model provides a meet underground continuous wall of pitted surface with precipitation function which characterized in that: the water storage tank is fixed on the lower portion of the face, facing the pit, of the steel reinforcement cage, is connected with the bottom of the round pipe, forms a closed communication system with the round pipe, is provided with a plurality of water inlet holes on the face, facing the soil, of the water storage tank respectively, and the steel reinforcement cage is placed in the groove and is formed into an on-site cast reinforced concrete wall body in a concrete pouring mode.
2. The underground continuous wall with the function of lowering water for the pithead-on surface of the underground continuous wall according to claim 1, is characterized in that: the thickness of the water storage tank is not more than half of that of the steel reinforcement cage, and the bottom surface of the water storage tank is in an arc shape.
3. The underground continuous wall with the function of lowering water for the pithead-on surface of the underground continuous wall according to claim 1, is characterized in that: the opening rate of the plurality of water inlet holes is not less than 50%; and a plurality of layers of filter screens with different pore diameters are bound at the outer sides of the water inlet holes.
4. The underground continuous wall with the function of lowering water for the pithead-on surface of the underground continuous wall according to claim 1, is characterized in that: the soil facing surface of the water storage tank is fixed with a circle of rubber surrounding barrier around the water inlet holes, and the height of the rubber surrounding barrier from the soil facing surface of the water storage tank is slightly larger than the gap between the reinforcement cage and the groove.
5. The underground continuous wall with the function of lowering water for the pithead-on surface of the underground continuous wall according to claim 1, is characterized in that: the water storage tank is made of steel or plastics, and the water storage tank has enough strength and rigidity, so that the water storage tank is not cracked and fails under the action of construction load and soil pressure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921272342.3U CN211036962U (en) | 2019-08-07 | 2019-08-07 | Underground continuous wall with pit-facing surface and dewatering function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921272342.3U CN211036962U (en) | 2019-08-07 | 2019-08-07 | Underground continuous wall with pit-facing surface and dewatering function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211036962U true CN211036962U (en) | 2020-07-17 |
Family
ID=71565768
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921272342.3U Expired - Fee Related CN211036962U (en) | 2019-08-07 | 2019-08-07 | Underground continuous wall with pit-facing surface and dewatering function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211036962U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110409420A (en) * | 2019-08-07 | 2019-11-05 | 中煤第三建设（集团）有限责任公司 | Meet the diaphram wall that pitted surface has precipitation function concurrently |
-
2019
- 2019-08-07 CN CN201921272342.3U patent/CN211036962U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110409420A (en) * | 2019-08-07 | 2019-11-05 | 中煤第三建设（集团）有限责任公司 | Meet the diaphram wall that pitted surface has precipitation function concurrently |
| CN110409420B (en) * | 2019-08-07 | 2024-04-16 | 中煤第三建设（集团）有限责任公司 | Underground continuous wall with pit facing surface and precipitation function |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103046565B (en) | Draining method for ultra-deep batholith deep foundation pit | |
| CN110409420B (en) | Underground continuous wall with pit facing surface and precipitation function | |
| JP2005256603A (en) | Underwater foundation structure | |
| CN110318410A (en) | A kind of deep basal pit chance artesian water is prominent to gush decompression drought stress construction method | |
| CN110847199A (en) | Construction method for drainage of underground water of deep foundation pit | |
| CN111139852A (en) | Water-rich sandy gravel stratum high-permeability ultra-deep foundation pit dewatering construction method | |
| KR100665984B1 (en) | The construction method of basement self drainage | |
| CN107794954B (en) | Anti-floating water leakage pressure relief structure | |
| CN104775439A (en) | Foundation pit support and water stop integrated structure and construction method thereof | |
| CN211036962U (en) | Underground continuous wall with pit-facing surface and dewatering function | |
| CN112627212B (en) | Water-faced cofferdam inner tube well dewatering dry excavation construction method | |
| CN109024711B (en) | Underground structure anti-floating system and construction method thereof | |
| CN114382073B (en) | Underground continuous wall system for protecting spring vein or underground water and construction method thereof | |
| CN211143104U (en) | Precipitation well arranged at bottom of underground diaphragm wall | |
| CN212336250U (en) | Pipe jacking connection guide row structure | |
| CN211037023U (en) | Pipe well dewatering well arranged at bottom of underground diaphragm wall | |
| CN110409474B (en) | Pipe well dewatering well arranged at bottom of underground diaphragm wall | |
| CN211143105U (en) | Set up in precipitation well of underground continuous wall inboard | |
| CN211143103U (en) | Underground continuous wall with built-in dewatering well | |
| JP3777085B2 (en) | Construction method of underground storage structure and underground storage structure | |
| CN109778873B (en) | Method and device for grouting and water stopping between enclosure piles | |
| CN107237331B (en) | Foundation pit construction method using water pressure support | |
| JPH11256609A (en) | Uplift prevention method of structure and uplift prevention construction | |
| JP2007218072A (en) | Manhole | |
| CN215857806U (en) | Earth work membrane level prevention of seepage membrane underground spring drainage structures down |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200717 Termination date: 20210807 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |