CN218880917U - Dewatering well structure for foundation pit drainage - Google Patents
Dewatering well structure for foundation pit drainage Download PDFInfo
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- CN218880917U CN218880917U CN202222877836.2U CN202222877836U CN218880917U CN 218880917 U CN218880917 U CN 218880917U CN 202222877836 U CN202222877836 U CN 202222877836U CN 218880917 U CN218880917 U CN 218880917U
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- 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
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- Engineering & Computer Science (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
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- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
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Abstract
The utility model discloses a precipitation well structure for foundation ditch drainage, include the well casing that sets up in the stake hole, the strainer, the lower part of well casing and strainer set up the filter material outward, upper portion outside at the well casing sets up the clay layer, the clay layer sets up the high range and is greatly favorable to playing stabilizing effect to more broken rock stratum environment, improve prevention of seepage water ability, the well platform of setting upwards covers the clay layer of part and connects subaerially at the outlying, utilize the well platform to play firm pushing down the effect to the clay layer at the partial gravity in clay layer top, avoid the outside infiltration of superstructure of stake hole within range simultaneously, construction safety is improved, set up the tube hole on the well platform in addition, be convenient for guide and support the outlet pipe, overall structure is simple to be convenient for the construction, still, do benefit to the stability that keeps pumping water the process.
Description
Technical Field
The utility model relates to an underground building engineering constructs technical field. More specifically, the utility model relates to a foundation ditch is precipitation well structure for drainage.
Background
A deep foundation pit area of an open excavation area in certain engineering construction belongs to a shallow hill landform unit of a Minjiang river system, main strata of the open excavation area are fully weathered sandstone, strongly weathered mudstone and fully weathered mudstone with conglomerate, underground water in the area is mainly bedrock fracture water, and all sections of the bedrock fracture water are different in water-rich property and have no uniform free water surface. The water quantity of the bedrock fracture is mainly controlled by factors such as fracture development degree, connectivity, fracture surface filling characteristics and the like, and a local water-rich section is often formed under the condition that a rock stratum is broken. Through the analysis to hydrogeological conditions, the foundation ditch precipitation adopts and obviously arranges as the main in the hole, and the mode of pit outer precipitation for assisting sets up precipitation well structure and carries out precipitation, but present precipitation well structure is to this kind of rock stratum of certain engineering than broken, the geological conditions of local rich water, leads to outside water to get into in the precipitation well easily, also does not benefit to the stability that keeps the structure of pumping water in-process.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a foundation ditch is precipitation well structure for drainage to solve among the prior art to the rock stratum than broken, local rich water regional precipitation well structure be unfavorable for keeping the technical problem of structure steadiness.
In order to realize the basis the utility model discloses a these purposes and other advantages provide a precipitation well structure for foundation ditch drainage, it is downthehole to set up the stake of foundation ditch department well position, include along the vertical well casing that sets up in the stake hole, the top of well casing upwards stretches out foundation ditch more than ground, the bottom of well casing is connected with the strainer downwards, the well casing, the strainer, the central line of stake hole is located same straight line, between the lower part outside of well casing and the inside wall of stake hole, it is provided with the filter material to fill between the outside of strainer and the inside wall of stake hole, it has the clay layer to backfill in the space that is located the top of filter material between the upper portion of well casing and the inside wall of stake hole, the ground of foundation ditch department encloses outside the stake hole and is equipped with the well platform, the top on the clay layer is connected to the bottom inboard of well platform outside, the top of well platform is higher than the top of well casing and covers and is provided with the apron, the upper end of well platform link up and has seted up the tube hole, penetrate in the tube hole and be provided with the outlet pipe, the outlet pipe is provided with the outlet pipe towards the inboard one end of inboard of well platform down extension of well platform and penetrate to be connected with the immersible pump to the strainer.
Preferably, the well pipe and the strainer pipe are respectively formed by sequentially welding a plurality of same segments along the length direction.
Preferably, the inner diameters of the well pipe and the strainer are the same, and the outer diameter of the well pipe is smaller than the outer diameter of the strainer.
Preferably, still including setting up spacing hole and the guide bracket in the top outside in stake hole, spacing hole symmetry is seted up in the top outside in stake hole, and the guide bracket includes:
the circular ring is horizontally arranged and sleeved on the outer side of the top of the well pipe, the inner diameter of the circular ring is consistent with the maximum outer diameter of the upper end of the well pipe, and the height of the circular ring is smaller than the height of the top of the well pipe extending out of the pile hole;
the supporting rods are C-shaped structures, openings of the supporting rods are arranged downwards, one supporting rod corresponds to one limiting hole, the lengths of the two ends of each supporting rod are different, the bottom of the longer end of each supporting rod is inserted into the corresponding limiting hole, and the shorter end of each supporting rod is connected with the outer side of the circular ring;
the slider, it installs a plurality ofly at the inboard symmetry of ring, the inboard of slider be used for with the lateral wall conflict of well casing.
Preferably, the middle part of the stay bar is also provided with a support leg downwards for abutting against the ground outside the pile hole.
The utility model discloses at least, include following beneficial effect: the utility model discloses a precipitation well structure for foundation ditch drainage sets up the well casing in the stake hole, the strainer, the lower part of well casing and the strainer set up the filter material outward, upper portion outside at the well casing sets up the clay layer, the clay layer sets up the high range and is greatly favorable to playing stabilizing effect to more broken rock stratum environment, improve prevention of seepage water ability, the well platform of setting upwards covers the clay layer of part and connects subaerially at the outlying, utilize the well platform to play firm pushing down the effect to the clay layer at the partial gravity in clay layer top, avoid the outside infiltration of superstructure of stake hole within range simultaneously, construction safety is improved, set up the tube hole in addition on the well platform, be convenient for guide and support the outlet pipe, cover as required at last and establish different thickness, the steel sheet of weight, cover the protection to the well head, the simple structure construction of being convenient for, still be favorable to keeping the stability of the process of drawing water.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.
Drawings
FIG. 1 is a front view structural diagram of the present invention;
fig. 2 is a front view structural diagram of a guide frame according to an embodiment of the present invention.
The specification reference numbers indicate: 1. pile hole, 2, well pipe, 3, strainer, 4, filter material, 5, clay layer, 6, well platform, 7, cover plate, 8, water outlet pipe, 9, submersible pump, 10, limiting hole, 11, guide frame, 12, ring, 13, brace rod, 14, slide block, 15 and brace foot.
Detailed Description
The present invention is further described in detail below with reference to the drawings so that those skilled in the art can implement the invention with reference to the description.
In the description of the present invention, the terms "lateral", "longitudinal", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
As shown in figures 1 and 2, the dewatering well structure for foundation pit drainage of the utility model is arranged in a pile hole 1 of a well position at a foundation pit, and comprises a well pipe 2 vertically arranged in the pile hole 1, the top of the well pipe 2 extends upwards to above the ground of the foundation pit, the bottom of the well pipe 2 is connected with a strainer 3 downwards, the well pipe 2, the strainer 3 and the central line of the pile hole 1 are positioned on the same straight line, and a filter material 4 is filled between the outer side of the lower part of the well pipe 2 and the inner side wall of the pile hole 1, and between the outer side of the strainer 3 and the inner side wall of the pile hole 1, fill between the inside wall of the upper portion of well casing 2 and in the stake hole 1 and be located the space of the top of filter material 4 and backfill clay layer 5, the ground of foundation ditch department encloses in stake hole 1 outside and is equipped with well platform 6, the top at clay layer 5 is connected to the bottom inboard of well platform 6, the subaerial in the stake hole 1 outside is connected in the bottom outside of well platform 6, the top that well platform 6 is higher than well casing 2 and the cover is provided with apron 7, the upper end of well platform 6 link up and has seted up the tube hole, it is provided with outlet pipe 8 to penetrate in the tube hole, outlet pipe 8 is connected with immersible pump 9 towards the inboard one end of well platform 6 inboard along well casing 2's axis downwardly extending and penetrate to strainer 3 behind the inboard.
During precipitation well construction, well casing 2 adopts the concrete pipe, and the chimney filter adopts twined concrete strip seam pipe, and pore-forming construction machinery chooses for use to dig the rig soon, adopts high-efficient polymer mud dado, can specifically adopt the following step construction:
(1) Well position measurement and release
And measuring the well placement position according to a well position plane layout diagram of the dewatering well, then rotationally drilling the drilling machine in place, aligning a horizontal drilling rod to the center of the hole, aligning the drilling rod, the rotary table and the center of the hole, stopping drilling when the drilling rod and the rotary table reach the depth of the protective cylinder of about 3 m, burying the protective cylinder, replacing a drill bit, and then drilling.
(2) Drilling to form holes
The drilling construction is carried out by utilizing a rotary drilling rig, the verticality is checked at any time in the drilling process, the verticality of the formed hole is ensured, the hole-forming construction adopts an inner-hole effective polymer slurry retaining wall, the slurry density is controlled to be 1.10-1.15 in the drilling process, when a drilling hammer is lifted or the drilling hammer is stopped, the hole must be fully filled with slurry to prevent the hole wall from collapsing, the hole body of the formed hole is round and vertical, the diameter of the hole body cannot be smaller than the designed hole diameter, and the inclination of a vertex angle cannot exceed 1 degree.
(3) Hole cleaning and pulp changing
And after the drilling hole is drilled to the designed elevation, lifting the drill hammer to 0.5m away from the bottom of the hole before lifting the drilling hole, punching to remove impurities in the hole, wherein the sediment at the bottom of the hole is less than 15cm until the returned slurry does not contain mud blocks.
(4) Well pipe 2 installation
After entering a field, the well pipe 2 and the strainer 3 are checked, the hole depth must be measured before the pipe is lowered, and the well pipe 2 and the strainer 3 are measured and recorded one by one. The well pipe 2 is lowered and the pipe is lifted and hung by adopting the cooperation of a crane, and the water filter pipe 3 is ensured to be placed in the middle during pipe lowering.
(5) Filling filter material 4
The filter material 4 is filled by a still water gravel filling method, and the filter material 4 is directly filled from a wellhead. The gravel filling is carried out uniformly and continuously along the periphery outside the well pipe 2, the height of the gravel filling is measured along with the filling during the gravel filling, the filter material 4 is 10-15 mm gravel outside the height range of the section of the water filtering pipe 3, the filter material 4 is 5-10 mm gravel outside the lower part of the section of the well pipe 2, and the gravel filter material 4 is required to meet the grading requirement and is backfilled to the position 2.0m below the ground. The upward returning height of the filter material 4 is tracked in the process of filling the filter material 4, when the filter material 4 is compacted to the designed height, clay balls are thrown between the well pipe 2 and the hole wall for water stop, the clay balls are high-quality air-dried clay balls with the diameter of less than or equal to 5cm, the upper parts of the clay balls are compacted by filling holes with clay blocks to form a clay layer 5, and a well platform 6 is bricked.
(6) And (4) washing the well, performing a water pumping test after the well washing, and arranging a cover plate 7 on the well platform 6.
(7) When the precipitation is formally operated, the submersible pump 9 is used for pumping water.
The utility model discloses a precipitation well structure for foundation ditch drainage sets up well casing 2 in stake hole 1, strainer 3, lower part and strainer 3 of well casing 2 set up filter material 4 outward, the upper portion outside at well casing 2 sets up clay layer 5, clay layer 5 sets up the great stabilizing action that is favorable to playing to more broken rock stratum environment of range of height, improve the prevention of seepage water ability, the well platform 6 of setting is upwards to cover partial clay layer 5 and connect at outlying subaerially, utilize the gravity of well platform 6 in clay layer 5 top part to play firm pushing down the effect to clay layer 5, avoid the outside infiltration of superstructure in stake hole 1 within range simultaneously, improve the construction safety, set up the pipe hole on well platform 6 in addition, be convenient for guide and support outlet pipe 8, cover according to needs and establish different thickness at last on well platform 6, the steel sheet of weight, cover the protection to the well head, overall structure is simple and is convenient for the construction, still be favorable to keeping the stability of process of drawing water.
In another technical scheme, the well pipe 2 and the strainer pipe 3 are respectively formed by sequentially welding a plurality of same segments along the length direction. The well pipe 2 and the strainer 3 are segment type, and the number of segments can be increased or decreased according to the conditions of different construction areas and the required length can be welded.
In another technical scheme, the inner diameters of the well pipe 2 and the strainer 3 are the same, and the outer diameter of the well pipe 2 is smaller than the outer diameter of the strainer 3. When the dewatering well is constructed, the well pipe 2 adopts a concrete pipe with the inner/outer diameter =300/360mm, the filter pipe adopts a wire-wound concrete strip seam pipe with the inner/outer diameter of 300/380mm, the aperture of the opening is phi 600mm, and the water pumping and filtering efficiency is improved.
In another technical solution, as shown in fig. 2, the pile driving device further includes a limiting hole 10 and a guiding frame 11 disposed on the outer side of the top of the pile hole 1, the limiting hole 10 is symmetrically disposed on the outer side of the top of the pile hole 1, and the guiding frame 11 includes:
the circular ring 12 is horizontally arranged and sleeved on the outer side of the top of the well pipe 2, the inner diameter of the circular ring 12 is consistent with the maximum outer diameter of the upper end of the well pipe 2, and the height of the circular ring 12 is smaller than the height of the top of the well pipe 2 extending out of the pile hole 1;
the stay bars 13 are C-shaped structures, the openings of the stay bars are downward, one stay bar 13 corresponds to one limiting hole 10, the lengths of the two ends of each stay bar 13 are different, the bottom of the longer end of each stay bar 13 is inserted into the corresponding limiting hole 10, and the shorter end of each stay bar 13 is connected with the outer side of the corresponding circular ring 12;
and a plurality of sliders 14 symmetrically installed inside the ring 12, wherein the inner side of the slider 14 is used for abutting against the outer side wall of the well pipe 2.
According to the range of a pile hole 1 and a well hole, the range of a guide frame 11 and the position of a limiting hole 10 are set, the fact that a ring 12 of the guide frame 11 is aligned with the center line of the pile hole 1 is guaranteed, a sliding block 14 is selected according to the outer diameter of the upper end of a well pipe 2, the well pipe 2 can slide up and down relative to the sliding block 14, after the well pipe 2 is placed down, after the sliding block 14 is installed and fixed on the inner side of the ring 12, the ring 12 is sleeved on the top of the well pipe 2, then equipment for lifting the well pipe 2 is matched, the ring 12 is horizontally moved until the outer end, far away from the ring 12, of a support rod 13 enters the limiting hole 10 which is correspondingly arranged in advance, therefore, the position of the well pipe 2 in the horizontal direction is adjusted, the well pipe 2 is rapidly and accurately kept aligned with the center line of the pile hole 1 after being placed down, and the guide frame 11 is taken away upwards after the well pipe 2 is stabilized, and can be recycled.
In another technical solution, as shown in fig. 2, a supporting foot 15 for abutting against the ground outside the pile hole 1 is further provided downward at the middle of the supporting rod 13. After the outer end of the support rod 13 is inserted into the limiting hole 10 downwards, the support leg 15 is arranged to assist in supporting the whole guide frame 11, and the stability of the structure is kept.
While the embodiments of the invention have been disclosed above, it is not limited to the applications set forth in the description and illustrated embodiments, but is capable of being applied in all kinds of fields adapted to the invention, and further modifications may readily be made by those skilled in the art, and the invention is therefore not limited to the details given herein and to the drawings described herein, without departing from the general concept defined by the appended claims and their equivalents.
Claims (5)
1. The dewatering well structure for foundation pit drainage is characterized in that the dewatering well structure is arranged in a pile hole of a well position at a foundation pit, the dewatering well structure comprises a well pipe which is vertically arranged in the pile hole, the top of the well pipe upwards extends out of the ground of the foundation pit and is above the ground of the foundation pit, the bottom of the well pipe is downwards connected with a strainer, the center line of the pile hole is located on the same straight line, a clay layer is filled between the outer side of the lower portion of the well pipe and the inner side wall of the pile hole and is arranged between the upper portion of the well pipe and the inner side wall of the pile hole and above the filter material, a well platform is arranged on the ground of the foundation pit outside the pile hole in a surrounding mode, the inner side of the bottom of the well platform is connected to the top of the clay layer, the outer side of the bottom of the well platform is connected to the ground of the outer side of the pile hole, a cover plate is arranged at the top of the well platform and is higher than the top of the well pipe in a covering mode, a pipe hole is formed in a through mode, a water outlet pipe is arranged in the upper end of the well platform in a penetrating mode, and a submersible pump is connected to the inner side of the water outlet pipe.
2. The dewatering well structure for foundation pit drainage according to claim 1, wherein the well pipe and the strainer are formed by sequentially welding a plurality of identical segments in a length direction.
3. The dewatering well structure for foundation pit drainage according to claim 1, wherein the inner diameters of the well pipe and the strainer are the same, and the outer diameter of the well pipe is smaller than the outer diameter of the strainer.
4. The dewatering well structure for foundation pit drainage as claimed in claim 1, further comprising a limiting hole and a guiding frame disposed outside the top of the pile hole, wherein the limiting hole is symmetrically disposed outside the top of the pile hole, and the guiding frame comprises:
the circular ring is horizontally arranged and sleeved on the outer side of the top of the well pipe, the inner diameter of the circular ring is consistent with the maximum outer diameter of the upper end of the well pipe, and the height of the circular ring is smaller than the height of the top of the well pipe extending out of the pile hole;
the supporting rods are C-shaped structures, openings of the supporting rods are arranged downwards, one supporting rod corresponds to one limiting hole, the lengths of the two ends of each supporting rod are different, the bottom of the longer end of each supporting rod is inserted into the corresponding limiting hole, and the shorter end of each supporting rod is connected with the outer side of the circular ring;
the sliding blocks are symmetrically arranged on the inner sides of the circular rings, and the inner sides of the sliding blocks are used for abutting against the outer side wall of the well pipe.
5. The dewatering well structure for foundation pit drainage according to claim 4, wherein the middle part of the brace bar is further provided with a support foot downward for abutting against the ground outside the pile hole.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222877836.2U CN218880917U (en) | 2022-10-31 | 2022-10-31 | Dewatering well structure for foundation pit drainage |
| DE202023102149.2U DE202023102149U1 (en) | 2022-10-31 | 2023-04-24 | Drainage well structure for excavation pit drainage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222877836.2U CN218880917U (en) | 2022-10-31 | 2022-10-31 | Dewatering well structure for foundation pit drainage |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218880917U true CN218880917U (en) | 2023-04-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222877836.2U Active CN218880917U (en) | 2022-10-31 | 2022-10-31 | Dewatering well structure for foundation pit drainage |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN218880917U (en) |
| DE (1) | DE202023102149U1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117702787B (en) * | 2023-12-18 | 2024-06-14 | 东晟兴诚集团有限公司 | Dewatering well packing device |
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2022
- 2022-10-31 CN CN202222877836.2U patent/CN218880917U/en active Active
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2023
- 2023-04-24 DE DE202023102149.2U patent/DE202023102149U1/en active Active
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| Publication number | Publication date |
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| DE202023102149U1 (en) | 2023-05-08 |
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