CN219219076U - Light well point dewatering well structure integrating pumping pipe well and well sealing section - Google Patents
Light well point dewatering well structure integrating pumping pipe well and well sealing section Download PDFInfo
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- CN219219076U CN219219076U CN202320245347.7U CN202320245347U CN219219076U CN 219219076 U CN219219076 U CN 219219076U CN 202320245347 U CN202320245347 U CN 202320245347U CN 219219076 U CN219219076 U CN 219219076U
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Abstract
The utility model discloses a light well point dewatering well structure integrating a water pumping pipe well and a well sealing section, which comprises a structure raft foundation and a lower sand layer below a water collecting pit, wherein an integrated water pumping shaft is buried in the structure raft foundation and the lower sand layer, and a steel plate water stop ring is arranged on the outer side of the wall of the integrated water pumping shaft buried in the structure raft foundation; the wall of the integrated pumping shaft buried in the lower sand stone layer of the foundation is provided with a hole, a water pump and a water pumping pipe are extended into the hole, and after water is led out through the water pumping pipe, the top of the integrated pumping shaft is sealed. The utility model solves the technical problem that the sand-free pumping pipe and the stainless steel shaft sealing pipe in the light well point system are not tightly sealed when being installed, avoids the problem that the water level rises to damage the concrete pouring quality and ensures the construction quality of the raft.
Description
Technical Field
The utility model belongs to the technical field of foundation pit dewatering, and particularly relates to a light well point dewatering well structure integrating a pumping pipe well and a well sealing section.
Background
Along with the development and construction of cities, the requirements of traffic and parking are higher and higher, the building extends to the underground space deeper and deeper, but the underground space construction is influenced by geology and underground water level differently, the water permeability of the underground soil layer and the depth of the underground water level are higher and higher, the requirement and difficulty of foundation pit dewatering are also higher and higher, the requirement of the foundation pit dewatering is limited by the construction period, the requirement of the foundation pit dewatering is fast, the construction quality can be guaranteed, and meanwhile, the cost can be reduced to the greatest extent.
At present, foundation pit precipitation schemes mainly comprise the following steps: 1. dewatering by adding water collecting well into open trench; 2. dewatering at the injection well point; 3. electro-osmotic well-point precipitation; 4. dewatering the well point of the pipe well; 5. dewatering the well points of the deep wells; 6. light well-point precipitation. These precipitation forms have the following disadvantages:
1. dewatering by adding water collecting well into open trench: in areas with abundant underground water, if the method is only adopted for precipitation, the difficulty of concrete injection is increased (the concrete injection cannot be carried out) when the anchor spraying net is used for supporting because the side slope of the foundation pit is more in water seepage, sometimes the expected effect is difficult to achieve due to the fact that a drain pipe is added, and the working surface is muddy and can not prevent construction operation.
2. Precipitation at injection well points: the injection well point system can generate a vacuum of 250mm mercury at the bottom of the well point, which reduces the water level to a large depth, typically in the range of 8-20 m. The permeability coefficient of the soil layer suitable for the method is as same as that of a light well point and is generally 0.1-50m/d. However, the pumping system and the injection well pipe are complex, the operation failure rate is high, the energy loss is high, and the required cost is higher than that of other well point methods.
3. Electroosmosis well-point precipitation: the electroosmosis well site is suitable for fine particulate soils with a small permeability coefficient, such as clay, loam, silt clay and the like. The permeability coefficient of the soil is less than 0.1m/d, and the purpose of precipitation is difficult to achieve by using a common well point. The electroosmosis phenomenon can be utilized to effectively suck and discharge water in the fine soil. It needs to be applied in combination with a light weight well point or a jet well point, the water level reduction depth of which is determined by the light weight well point or the jet well point. In the electroosmosis well point dewatering process, voltage, current density, power consumption and the like are measured and regulated in necessary mode, and records are made, so that the electroosmosis well point dewatering process is complex, long in period and high in dewatering cost.
4. Dewatering the well point of a pipe well: the pipe well point is suitable for gravel layers with large permeability coefficients, strata with abundant groundwater and occasions where light well points are not easy to solve. The water flow rate of each pipe well can reach 50-100m3/h, the permeability coefficient of soil is in the range of 20-200m/d, and the depth of the groundwater level is reduced by about 3-5m. This method is generally used for diving precipitation, and is limited in use due to geological soil layers.
5. Precipitation at deep well points: the method is limited by the situations that the permeability coefficient of a gravel layer and the like is large and the thickness of a permeable layer is large, the permeability coefficient of a soil layer suitable for deep well points is 10-250m/d, the depth of a reduced water level can be more than 15m, the method is commonly used for reducing pressure-bearing water, and a cementing layer with a small permeability coefficient of the soil layer cannot be adopted.
6. Light well-point precipitation: the number of the soil layer permeability coefficient suitable for the light well point is 0.1-50m/d, and when the soil layer permeability coefficient is smaller, measures such as clay sealing and filling are needed to be adopted at the top of the well point pipe, the air tightness of each connecting part of the well point system is ensured, and the like are needed. Because this well point system contains two kinds of structural system, behind pumping well will actual water level reduction 3-6m scope, at the upper portion construction section of sealing the well, this process has lengthened the precipitation cycle greatly, if in rainy season construction, once stopping the precipitation, the water level can rise very fast again, simultaneously because upper and lower two sections belong to different materials, need install, the clearance between them needs clay to pack, the vacuum and the leakproofness of whole well point system are hardly improved in actual operation in-process, can cause underground garage to appear the infiltration condition of leaking in the use later stage, seriously influence later stage use experience.
Aiming at the problems, the light well point dewatering well structure integrating the pumping pipe well and the well sealing section is provided on the basis, so that the technical problem that the light well point dewatering is to be solved in the field at present is solved.
Disclosure of Invention
The utility model aims to provide a light well point dewatering well structure integrating a water pumping pipe well and a well sealing section, which solves the technical problem that a sand-free water pumping pipe tube and a stainless steel sealing shaft tube in a light well point system are not tightly sealed when being installed, avoids that raft board drainage water permeates into an underground garage through the outside of the pipe tube, avoids the problem that the concrete pouring quality is damaged due to water level rising, and ensures the construction quality of the raft board.
The utility model is realized by the following technical scheme.
The utility model provides a light well point dewatering well structure integrating a pumping pipe well and a well sealing section, which comprises a structural raft foundation and a lower sand layer below a water collecting pit, wherein an integrated pumping shaft is buried in the structural raft foundation and the lower sand layer, and a steel plate water stop ring is arranged on the outer side of the wall of the integrated pumping shaft buried in the structural raft foundation; the wall of the integrated pumping shaft buried in the lower sand stone layer of the foundation is provided with a hole, a water pump and a water pumping pipe are extended into the hole, and after water is led out through the water pumping pipe, the top of the integrated pumping shaft is sealed.
Preferably, the integrated pumping shaft comprises a stainless steel tube, a stainless steel sealing plate and a filter screen, wherein two steel plate water stop rings are arranged on the outer side of the upper part of the stainless steel tube, and the stainless steel sealing plate seals the tube at the top of the stainless steel tube; the filter screen is wrapped on the outer side of the lower section of the stainless steel cylinder tube.
Preferably, the filter screen adopts two nylon dense nets.
Preferably, the filter screen is wrapped on the outer side of the stainless steel cylinder tube buried in the lower sand stone layer of the foundation.
Preferably, the middle and upper sections of the stainless steel cylinder tube are filled with concrete.
Preferably, the middle and lower sections of the stainless steel cylinder tube are filled with natural graded sand.
Preferably, the length of the integrated pumping shaft buried in the underlying sand layer is greater than the length of the integrated pumping shaft buried in the structural raft foundation.
Preferably, an SBS waterproof layer and a concrete cushion layer are paved at the bottom of the structural raft foundation, and the SBS waterproof layer is bonded with the outer wall of the stainless steel cylinder tube of the integrated pumping shaft.
Due to the adoption of the technical scheme, the utility model has the following beneficial effects:
1. the lower pumping pipe and the upper well sealing section are integrated, the pumping pipe and the well sealing section pipe are integrally manufactured by adopting stainless steel pipe with the same diameter, the same wall thickness and the same material, and the pumping pipe and the well sealing section pipe are installed in place at one time, so that the technical problem that the sand-free pumping pipe and the stainless steel well sealing section pipe in the whole well point system in the prior art are not tightly sealed during installation is completely solved.
2. The steel plate water stop ring is welded at the middle part of the well-sealing section bobbin in advance, so that the water discharged from the raft is prevented from penetrating into the underground garage through the outside of the bobbin.
3. The inside of the well-sealing section bobbin is poured with concrete, and the top of the bobbin is welded and sealed by a stainless steel plate after water pumping, so that the water in the raft is prevented from penetrating into the underground garage through the inside of the bobbin.
4. Compared with the traditional precipitation scheme, the structure does not influence external reinforcement binding during precipitation, can be performed simultaneously, reduces well sealing steps after precipitation reaches a planned height, and saves construction period.
5. During the large-volume concrete pouring, the water suction pump can continuously pump water, so that the problem that the water level rises to damage the concrete pouring quality in the prior art is avoided when the precipitation is required to be stopped during the pouring of the structural raft. This integrated precipitation well structure can guarantee that the precipitation normally goes on, until the lower part concrete initial setting accomplish the back, raft concrete placement just need stop the suction pump and draw water to the raft top, has guaranteed raft construction quality.
Drawings
The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this application, illustrate and do not limit the utility model, and together with the description serve to explain the principle of the utility model:
FIG. 1 is a schematic diagram of the structure of the present utility model;
FIG. 2 is a schematic diagram of an integrated pumped wellbore and seal.
In the figure, 1. A structural raft foundation; SBS waterproof layer; 3. a concrete cushion layer; 4. a sand layer is arranged under the foundation;
5. an integrated pumping shaft; 501. a stainless steel bobbin; 502. a steel plate water stop ring; 503. stainless steel sealing plate; 504. and (3) a filter screen.
6. The concrete comprises a water pump, a water pumping pipe, natural graded sand stone and concrete.
Detailed Description
The present utility model will now be described in detail with reference to the drawings and the specific embodiments thereof, wherein the exemplary embodiments and descriptions of the present utility model are provided for illustration of the utility model and are not intended to be limiting.
As shown in fig. 1, the embodiment of the utility model provides a light well-point dewatering well structure integrating a pumping pipe well and a well-sealing section, which comprises a structural raft foundation 1 below a water collecting pit and a lower sand layer 4 below the foundation, wherein an integrated pumping shaft is buried in the structural raft foundation 1 and the lower sand layer 4, and a steel plate water stop ring 502 is arranged outside the wall of the integrated pumping shaft 5 buried in the structural raft foundation 1; the wall of an integrated water pumping shaft 5 buried in the lower sand layer 4 of the foundation is provided with a hole, a water pump 6 and a water pumping pipe 7 extend into the hole, and after water is led out through the water pumping pipe, the top of the integrated water pumping shaft is sealed.
Wherein, the length of the integrated pumping shaft 5 buried in the underlying sand layer 4 is greater than the length of the integrated pumping shaft 5 buried in the structural raft foundation 1.
Concrete 9 is filled in the upper section of the integrated pumping shaft 5, and natural graded sand stone 8 is filled in the lower section of the integrated pumping shaft 5.
Wherein, be equipped with structure raft foundation 1 below the sump pit, structure raft foundation bottom lays SBS waterproof layer 2 and concrete cushion 3, and integration pit shaft 5 sets up in advance in the grit layer 4 under the basis of sump pit structure raft foundation 1 below, and the SBS waterproof layer bonds with the stainless steel tube outer wall of integration pit shaft. A steel plate water stop ring 502 is arranged on the outer side of the wall of the integrated pumping shaft 5 in the structural raft foundation 1.
As shown in fig. 2, the integrated pumping shaft 5 comprises a stainless steel tube 501, a stainless steel sealing plate 503 and a filter screen 504, wherein two steel plate water stop rings 502 are arranged on the outer side of the upper portion of the stainless steel tube 501, the stainless steel tube 501 is later poured in the structural raft foundation 1, the stainless steel sealing plate 503 is arranged on the top of the stainless steel tube 501, the filter screen 504 is wrapped below the steel plate water stop rings 502 of the stainless steel tube 501, and the stainless steel tube sections wrapped by the filter screen are correspondingly buried in the sand and gravel tube section area under the foundation. The filter screen 504 is a two-pass nylon mesh.
And the lower pumping pipe and the upper well sealing section are integrally manufactured by adopting stainless steel cylinder pipes with the same diameter, the same wall thickness and the same material.
When this structure is implemented, the stainless steel bobbin upper segment is inside to be filled with structural raft concrete, and structural raft basis is pour to stainless steel cylinder tube head, and after the drinking-water pipe was taken out with water, stainless steel bobbin and stainless steel sealing plate seal welding.
In one embodiment of the utility model: digging a water pit to a designed elevation, centering and then downwards digging a well for 2 meters deep, preparing a stainless steel cylinder pipe 501 with the length of 3.5 meters, the diameter of 800mm and the wall thickness of 6mm, wherein the lower part of the cylinder pipe is 2 meters long (the part buried in a lower sand stone layer of a foundation), and the cylinder wall is perforated according to a plum blossom shape, the diameter of the hole is 30mm, and the interval is 400mm; filling natural graded sand stone 8 in the range of 500mm at the lower part of the cylinder, then placing a water pump 6, and installing a water pumping pipe 7; continuously pumping water, and completing construction of the concrete cushion layer 3 with the thickness of 100mm after the elevation of the underground water level is kept to be lower than the bottom of the raft foundation by 500mm all the time; after the concrete cushion layer reaches a certain strength, paving a 4mm thick SBS waterproof layer 2 on the concrete cushion layer, and then constructing a 50mm thick concrete SBS waterproof layer; and after the concrete protection layer reaches a certain strength, binding 1 steel bar of the raft foundation of the structure, pouring raft concrete, stopping pumping water at the position where the pouring height of the raft concrete is basically level with the upper opening of the stainless steel cylinder 501, pumping out the water pumping pipe 7, pouring concrete on the inner side of the cylinder wall, after the pouring in the cylinder is compact, sealing the cylinder opening by using a groove girth welding of a stainless steel sealing plate 503 with the thickness of 10mm, and then continuing pouring the raft concrete to the original design height.
The structure of the utility model solves the problems of poor foundation pit dewatering construction operation effect, high operation failure rate, large energy loss, long period, high dewatering cost, water seepage and water leakage in the use process, and the like, and ensures the raft construction quality.
The utility model is not limited to the above embodiments, and based on the technical solution disclosed in the utility model, a person skilled in the art may make some substitutions and modifications to some technical features thereof without creative effort according to the technical content disclosed, and all the substitutions and modifications are within the protection scope of the utility model.
Claims (8)
1. The light well point dewatering well structure is characterized by comprising a structure raft foundation and a lower sand layer below a water collecting pit, wherein an integrated water pumping shaft is buried in the structure raft foundation and the lower sand layer, and a steel plate water stop ring is arranged on the outer side of the wall of the integrated water pumping shaft buried in the structure raft foundation; the wall of the integrated pumping shaft buried in the lower sand stone layer of the foundation is provided with a hole, a water pump and a water pumping pipe are extended into the hole, and after water is led out through the water pumping pipe, the top of the integrated pumping shaft is sealed.
2. The integrated light well point dewatering well structure of a water pumping pipe well and a well sealing section according to claim 1, wherein the integrated water pumping well shaft comprises a stainless steel tube, a stainless steel sealing plate and a filter screen, two steel plate water stop rings are arranged on the outer side of the upper part of the stainless steel tube, and the stainless steel sealing plate seals the tube at the top of the stainless steel tube; the filter screen is wrapped on the outer side of the lower section of the stainless steel cylinder tube.
3. The integrated water pumping tube well and well-sealing section light well-point dewatering well structure according to claim 2, wherein the filter screen adopts two nylon dense screens.
4. The integrated water extraction tube well and well section light well point dewatering well structure according to claim 2, wherein the filter screen is wrapped outside a stainless steel cylinder tube buried in the underlying sand layer.
5. The integrated water extraction tube well and well seal section light well point dewatering well structure according to claim 2, wherein the upper middle section of the stainless steel tube is filled with concrete.
6. The integrated water extraction tube well and well seal section light well point dewatering well structure according to claim 2, wherein the middle lower section of the stainless steel tube is filled with natural graded sand.
7. The integrated water extraction tube well and seal section light well point dewatering well structure according to claim 1, wherein the length of the integrated water extraction well shaft buried in the underlying sand layer is greater than the length of the integrated water extraction well shaft buried in the structural raft foundation.
8. The integrated light well point dewatering well structure of water pumping well and well sealing section according to claim 1, wherein the SBS waterproof layer and the concrete cushion layer are paved at the bottom of the raft foundation of the structure, and the SBS waterproof layer is bonded with the outer wall of the stainless steel cylinder tube of the integrated water pumping well.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320245347.7U CN219219076U (en) | 2023-02-17 | 2023-02-17 | Light well point dewatering well structure integrating pumping pipe well and well sealing section |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320245347.7U CN219219076U (en) | 2023-02-17 | 2023-02-17 | Light well point dewatering well structure integrating pumping pipe well and well sealing section |
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| Publication Number | Publication Date |
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| CN219219076U true CN219219076U (en) | 2023-06-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202320245347.7U Active CN219219076U (en) | 2023-02-17 | 2023-02-17 | Light well point dewatering well structure integrating pumping pipe well and well sealing section |
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| CN (1) | CN219219076U (en) |
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- 2023-02-17 CN CN202320245347.7U patent/CN219219076U/en active Active
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