CN218090926U - Combined type foundation pit dewatering well - Google Patents
Combined type foundation pit dewatering well Download PDFInfo
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- CN218090926U CN218090926U CN202221906515.4U CN202221906515U CN218090926U CN 218090926 U CN218090926 U CN 218090926U CN 202221906515 U CN202221906515 U CN 202221906515U CN 218090926 U CN218090926 U CN 218090926U
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- precipitation
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Abstract
The utility model discloses a composite foundation pit dewatering well, which comprises a first dewatering tube well (1), a second dewatering tube well (2), a protective net (3), a bottom tray (4), backfill (5) and a connecting component; the first downcomer well is arranged in the downcomer well forming hole and extends downwards from the bottom surface (10) of the foundation pit to the bottom (20) of the pit; the second downcast pipe well is arranged in the downcast well and extends upwards from the bottom surface of the foundation pit to the position below the natural ground (30); the upper end of the first downcomer well is fixedly connected with the lower end of the second downcomer well through the connecting assembly to form a composite downcomer well; the backfill material is backfilled in a gap between the combined type precipitation pipe well and the precipitation well pore-forming, the protective net is circumferentially arranged on the inner wall of the combined type precipitation pipe well in a surrounding manner, and the bottom tray is arranged at the bottom of the well. The utility model discloses can improve the structural strength of precipitation well on the basis of guaranteeing precipitation well high efficiency drainage function.
Description
Technical Field
The utility model relates to a drainage structure falls in construction scene especially relates to a combined type foundation ditch precipitation well.
Background
In the construction process of the deep foundation pit, the influence of underground water on the foundation pit construction is large. Before general deep foundation pit construction, a supporting structure and a waterproof curtain need to be constructed around the foundation pit, so that underground water in an excavated soil body range is isolated and sealed from the outside. Meanwhile, before earth excavation construction, a dewatering well needs to be constructed according to design drawings, and earth excavation is carried out after underground water level is reduced in advance.
The tube well precipitation is used as a foundation pit precipitation mode, and the sand-free tube is mostly used as a filter tube in tube well precipitation due to low manufacturing cost and excellent water permeability. However, the sand-free pipe has relatively low strength due to good water permeability, is easy to damage in the construction process of a dewatering well, is easy to collide and damage in the process of foundation pit dewatering and earth excavation, and can cause the rejection of the dewatering well and a water pump due to the damage of the sand-free pipe, so that great potential safety hazard is caused for the construction of a deep foundation pit.
Disclosure of Invention
An object of the utility model is to provide a combined type foundation ditch precipitation well can improve the structural strength of precipitation well on the basis of guaranteeing precipitation well high efficiency drainage function.
The utility model discloses a realize like this:
a composite foundation pit dewatering well comprises a first dewatering tube well, a second dewatering tube well, a protective net, a bottom tray, backfill materials and a connecting assembly; the first dewatering pipe well is arranged in the dewatering well forming hole and extends downwards from the bottom surface of the foundation pit to the bottom of the pit; the second dewatering pipe well is arranged in the dewatering well and extends upwards from the bottom surface of the foundation pit to the position below the natural ground; the upper end of the first downcomer well is fixedly connected with the lower end of the second downcomer well through a connecting assembly to form a composite downcomer well; the backfill material is backfilled in a gap between the combined type precipitation pipe well and the precipitation well pore-forming, the protective net is circumferentially arranged on the inner wall of the combined type precipitation pipe well in a surrounding manner, and the bottom tray is arranged at the bottom of the well.
The first downcomer well is a sand-free filter pipe, and the second downcomer well is a corrugated filter pipe with filter holes.
The connecting assembly comprises a socket joint, the lower end of the socket joint is matched and sleeved with the upper end of the first downcomer well, and the upper end of the socket joint is matched and inserted with the lower end of the second downcomer well.
The inner diameter of the first downcomer well is consistent with the inner diameter of the second downcomer well, the outer diameter of the first downcomer well is larger than that of the second downcomer well, and the diameter of the lower end of the socket joint is larger than that of the upper end of the socket joint.
The connecting assembly also comprises pressing strips parallel to the axial direction of the combined type downcast pipe well, and the plurality of pressing strips are circumferentially distributed on the outer wall of the combined type downcast pipe well and fixed; the middle part of the pressing strip is provided with a convex structure and can be attached to the outer wall of the socket joint.
The outer wall of the combined type downcast pipe well is wrapped with a gauze, and the pressing strip is tightly pressed on the gauze.
And the top of the second downcomer well is provided with a well mouth, and the well mouth is constructed to the elevation of the natural ground.
The top surface of the well head is of a slope surface structure, and one side of the slope surface structure, which is close to the second downcomer well, is higher than one side of the slope surface structure, which is close to the natural ground.
Compared with the prior art, the utility model, following beneficial effect has:
1. the utility model discloses owing to adopt no sand filter tube as first precipitation pipe well below foundation ditch bottom surface elevation, adopt the ripple filter tube as second precipitation pipe well above foundation ditch bottom surface elevation, precipitation well efficient dewatering function can be guaranteed to first precipitation pipe well, avoid precipitation well to use and the destruction of foundation ditch construction to first precipitation pipe, second precipitation pipe well has good structural strength, can reduce precipitation well use and the destruction of foundation ditch construction to second precipitation pipe well on keeping the basis of dewatering function, the precipitation function has been taken into account to structural strength and cost.
2. The utility model discloses owing to be equipped with protection network and layering, the protection network can play the guard action in precipitation tube well, prevents that combined type precipitation tube well from being destroyed the back piece and dropping to in the precipitation tube well and leading to stifled well, and the layering can play the effect of enhancement connection and protection in the outside of combined type precipitation tube well to the steady good operation of precipitation well and water pump has been guaranteed.
Drawings
FIG. 1 is a sectional view of the composite foundation pit dewatering well of the present invention;
figure 2 is the utility model discloses the cross-sectional view of first precipitation tube well and second precipitation tube well junction in the combined type foundation ditch precipitation well.
In the figure, 1 a first downcomer well, 2 a second downcomer well, 21 filtering holes, 22 wellheads, 3 protective nets, 4 bottom trays, 5 backfill materials, 61 socket joints, 62 pressing strips, 10 foundation pit bottom surfaces, 20 bottom wells and 30 natural ground.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and specific embodiments.
Referring to the attached drawings 1 and 2, the composite foundation pit dewatering well comprises a first dewatering pipe well 1, a second dewatering pipe well 2, a protective net 3, a bottom tray 4, backfill 5 and a connecting assembly; the first downcomer well 1 is arranged in the dewatering well forming hole, and the first downcomer well 1 extends downwards from the bottom surface 10 of the foundation pit to the bottom 20 of the pit; the second downcomer well 2 is arranged in the dewatering well forming hole, and the second downcomer well 2 extends upwards from the bottom surface 10 of the foundation pit to the position below the natural ground 30; the upper end of the first downcomer well 1 is fixedly connected with the lower end of the second downcomer well 2 through a connecting assembly to form a composite downcomer well; backfill materials 5 are backfilled in a gap between the combined type precipitation pipe well and the precipitation well pore-forming, a protective net 3 is circumferentially arranged on the inner wall of the combined type precipitation pipe well in a surrounding mode, and a bottom tray 4 is arranged at the well bottom 20.
The elevation of the bottom surface 10 of the foundation pit is used as a boundary, the downcomer well is divided into an upper part and a lower part, the downcomer well with proper materials and specifications is selected according to the drainage requirement of underground water and the strength requirement in the construction process and is used as a first downcomer well 1 and a second downcomer well 2, and the downcomer well is prevented from being damaged on the basis of ensuring the drainage function. The protective net 3 can prevent fragments from falling into the well after the precipitation pipe well is damaged in the construction process to cause well blockage, thereby avoiding the precipitation well and the water pump from being scrapped. The bottom tray 4 is used for placing equipment such as a water pump and can be made of cement materials, and the backfill material 5 can be coarse sand and is used for guaranteeing the setting stability and the dewatering and drainage functions of the combined type dewatering pipe well.
The first downcomer well 1 is a sand-free filter pipe, and the second downcomer well 2 is a corrugated filter pipe with filter holes 21. The sand-free filter pipe has extremely high drainage performance and low cost, can meet the drainage requirement below the bottom surface of the foundation pit, and can ensure the safe arrangement of the sand-free filter pipe because the disturbance received below the bottom surface of the foundation pit is less. The corrugated filter pipe has higher structural strength, and can avoid being damaged or reduce the damage degree of the corrugated filter pipe in the process of foundation pit dewatering and earthwork excavation.
Preferably, the filtering holes 21 are arranged along the radial direction of the second downcomer well 2, a plurality of filtering holes 21 are circumferentially arranged on the second downcomer well 2 to form a row of filtering holes 21, and the plurality of rows of filtering holes 21 are axially arranged at intervals along the second downcomer well 2. The purpose of drainage is achieved through the arrangement of the filter holes 21, and the number and the aperture of the filter holes 21 can be adjusted according to actual requirements.
The connecting assembly comprises a socket joint 61, the lower end of the socket joint 61 is in matched socket joint with the upper end of the first downcomer well 1, and the upper end of the socket joint 61 is in matched socket joint with the lower end of the second downcomer well 2. The socket joint 61 can be adaptively selected according to the specification and size of the second downcomer well 2 and the first downcomer well 1, and it is sufficient to ensure reliable connection between the second downcomer well 2 and the first downcomer well 1.
The inner diameter of the first downcomer well 1 is consistent with the inner diameter of the second downcomer well 2, the outer diameter of the first downcomer well 1 is slightly larger than the outer diameter of the second downcomer well 2, the diameter of the lower end of the socket joint 61 is slightly larger than the diameter of the upper end of the socket joint 61, and the socket joint 61 can adapt to connection of the first downcomer well 1 and the second downcomer well 2 which are made of different materials and have different specifications and sizes, so that stability and reliability of a connection node are guaranteed.
The connecting assembly further comprises pressing strips 62 parallel to the axial direction of the combined type downcast pipe well, and the plurality of pressing strips 62 are circumferentially distributed on the outer wall of the combined type downcast pipe well and are bound and fixed through iron wires; the middle part of the pressing strip 62 is formed with a convex structure and can be attached to the outer wall of the socket joint 61. The connection reliability and stability of the first downcomer well 1 and the second downcomer well 2 can be further improved through the arrangement of the pressing strips 62, the pressing strips 62 can extend to the top and the bottom of the combined type downcomer well, and at the socket joint 61, the pressing strips 62 are prevented from colliding and interfering with the socket joint 61 through a protruding structure.
The outer wall of the combined type precipitation tube well is wrapped with a gauze (not shown in the figure), and the batten 62 is tightly pressed on the gauze, so that fragments of the first precipitation tube well 1 and the second precipitation tube well 2 can be prevented from falling off when being damaged.
The top of second downcomer well 2 be equipped with well head 22, well head 22 is under construction to the natural ground elevation, preferably, can adopt materials such as clay to construct well head 22, has good bearing capacity, ensures well head 22's structural strength and stability.
The top surface of the well mouth 22 is a slope structure, and one side of the slope structure close to the second downpipe well 2 is higher than one side of the slope structure close to the natural ground 30, so that the well mouth has good flow guiding and guiding effects.
Referring to fig. 1 and fig. 2, the construction process of the present invention is:
1. and (3) arranging filter holes 21 on a DN400 corrugated pipe as required to form a corrugated filter pipe, wherein the filter holes 21 are used as the second downcomer well 2 and must not be too large or too small. Preferably, the aperture of the filter holes 21 is 10mm, each row of the filter holes 21 is provided with 5 filter holes at equal intervals, and the interval between two adjacent rows of the filter holes 21 is 1m.
And selecting a DN400 corrugated pipe with a proper length according to the distance between the natural ground 30 and the bottom surface 10 of the foundation pit, and if the distance between the natural ground 30 and the bottom surface 10 of the foundation pit is larger, adopting the DN400 corrugated pipes with the length of 6m to be sequentially and coaxially connected through matched special socket joints to form a second downcomer well 2 with a corresponding length.
2. The sand-free filter pipe with the diameter of 400mm is used as the first downcomer well 1, the sand-free filter pipe with the proper length is selected according to the distance between the bottom surface 10 of the foundation pit and the bottom hole 20 of the foundation pit, and if the distance between the bottom surface 10 of the foundation pit and the bottom hole 20 of the foundation pit is large, the sand-free filter pipe with the length of 1m can be sequentially and coaxially spliced to form the downcomer well.
3. After the dewatering well is formed, a sand-free filter pipe is arranged below the bottom surface 10 of the foundation pit, a corrugated filter pipe is arranged above the bottom surface 10 of the foundation pit, and the sand-free filter pipe and the corrugated filter pipe are connected with the bottom surface 10 of the foundation pit through a socket joint 61 to form the composite dewatering pipe well.
4. Placing a steel wire mesh sheet on the inner wall of the combined type downcast pipe well to be used as a protective net 3; the aperture of the steel wire mesh sheet can be selected according to actual requirements, and is preferably 2.5mm. The gauze is wrapped on the outer wall of the combined type precipitation pipe well, four bamboo pressing strips 62 are vertically arranged on the outer side of the combined type precipitation pipe well and are bound and fixed through iron wires, so that the connection stability of all sand-free filter pipes and corrugated filter pipes is guaranteed, and meanwhile, the wrapping reliability of the gauze is also guaranteed.
No sand filter tube and ripple filter tube can adopt and install one by one in the well or connect back integral hoisting to the well in the mode such as be under construction, can do the adaptability according to actual construction conditions and select, and here is no longer repeated.
5. Coarse sand is backfilled in a gap between the combined type downcomer well and the pore-forming of the dewatering well and serves as backfill material 5, and a well head 22 is constructed on the top of the combined type downcomer well by adopting clay. And after the well is washed, the dewatering well can be operated by putting the water pump into the well.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and should not be taken as limiting the scope of the present invention, therefore, any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention should be included in the scope of the present invention.
Claims (8)
1. The utility model provides a combined type foundation ditch precipitation well, characterized by: comprises a first downcast pipe well (1), a second downcast pipe well (2), a protective net (3), a bottom tray (4), backfill (5) and a connecting assembly; the first downcomer well (1) is arranged in the dewatering well forming hole, and the first downcomer well (1) extends downwards from the bottom surface (10) of the foundation pit to the bottom (20) of the pit; the second downcomer well (2) is arranged in the downcomer well, and the second downcomer well (2) extends upwards from the bottom surface (10) of the foundation pit to the position below the natural ground (30); the upper end of the first downcomer well (1) is fixedly connected with the lower end of the second downcomer well (2) through a connecting assembly to form a composite downcomer well; backfill materials (5) are backfilled in a gap between the combined type precipitation pipe well and the precipitation well pore-forming, a protective net (3) is circumferentially arranged on the inner wall of the combined type precipitation pipe well in a surrounding mode, and a bottom tray (4) is arranged at the bottom of the well (20).
2. The composite foundation pit dewatering well as claimed in claim 1, wherein: the first downcomer well (1) is a sand-free filter pipe, and the second downcomer well (2) is a corrugated filter pipe with filter holes (21).
3. The composite foundation pit dewatering well as claimed in claim 1, wherein: the connecting assembly comprises a socket joint (61), the lower end of the socket joint (61) is in matched sleeve joint with the upper end of the first downcomer well (1), and the upper end of the socket joint (61) is in matched plug joint with the lower end of the second downcomer well (2).
4. The composite foundation pit dewatering well as claimed in claim 3, wherein: the inner diameter of the first downcomer well (1) is consistent with the inner diameter of the second downcomer well (2), the outer diameter of the first downcomer well (1) is larger than the outer diameter of the second downcomer well (2), and the diameter of the lower end of the socket joint (61) is larger than the diameter of the upper end.
5. The composite foundation pit dewatering well as claimed in claim 3, wherein: the connecting assembly further comprises a pressing strip (62) parallel to the axial direction of the composite type downcomer well, and the plurality of pressing strips (62) are circumferentially distributed on the outer wall of the composite type downcomer well and fixed; the middle part of the pressing strip (62) is provided with a convex structure and can be attached to the outer wall of the socket joint (61).
6. The composite foundation pit dewatering well as claimed in claim 5, wherein: the outer wall of the combined type precipitation pipe well is wrapped with a gauze, and a pressing strip (62) is tightly pressed on the gauze.
7. The composite foundation pit dewatering well as defined in any one of claims 1 to 4, wherein: the top of the second downcomer well (2) is provided with a well head (22), and the well head (22) is constructed to the elevation of the natural ground.
8. The composite foundation pit dewatering well as claimed in claim 7, wherein: the top surface of the well mouth (22) is a slope surface structure, and one side of the slope surface structure, which is close to the second downcomer well (2), is higher than one side of the slope surface structure, which is close to the natural ground (30).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221906515.4U CN218090926U (en) | 2022-07-20 | 2022-07-20 | Combined type foundation pit dewatering well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221906515.4U CN218090926U (en) | 2022-07-20 | 2022-07-20 | Combined type foundation pit dewatering well |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218090926U true CN218090926U (en) | 2022-12-20 |
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ID=84482013
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221906515.4U Active CN218090926U (en) | 2022-07-20 | 2022-07-20 | Combined type foundation pit dewatering well |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218090926U (en) |
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2022
- 2022-07-20 CN CN202221906515.4U patent/CN218090926U/en active Active
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