CN212506349U - Water-logging well sealing device for water-lowering zone of ultra-deep foundation pit pipe well - Google Patents
Water-logging well sealing device for water-lowering zone of ultra-deep foundation pit pipe well Download PDFInfo
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- CN212506349U CN212506349U CN202021066642.9U CN202021066642U CN212506349U CN 212506349 U CN212506349 U CN 212506349U CN 202021066642 U CN202021066642 U CN 202021066642U CN 212506349 U CN212506349 U CN 212506349U
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Abstract
The utility model discloses a be used for ultra-deep foundation ditch tubular well precipitation area water seal well device, include: the well casing comprises coarse gravel, quick-setting cement and a lower well sealing cover plate from bottom to top in sequence; the well pipe is provided with a variable cross-section steel sleeve along the height direction, the top of the variable cross-section steel sleeve is welded with an upper well sealing cover plate, and a space formed by the variable cross-section steel sleeve and a lower well sealing cover plate is filled with micro-expansion concrete; the concrete cushion layer, the waterproof layer and the foundation pit bottom plate are sequentially arranged on the foundation pit from bottom to top, micro-expansion concrete is filled in a space formed by the foundation pit bottom plate and the variable cross-section steel sleeve, cement-based capillary crystalline waterproof coating is arranged on the micro-expansion concrete, and waterproof coiled materials are laid on the cement-based capillary crystalline waterproof coating. The utility model provides a well shut-in failure midway, well shut-in quality are low often appear when the ultra-deep foundation ditch engineering that exists seals the well among the prior art, later stage seepage can't realize that the immersible pump is retrieved, adopts the high price that the sodium silicate glued, the low scheduling problem of feature of environmental protection.
Description
Technical Field
The utility model belongs to the technical field of foundation ditch precipitation well shut-in the construction, a be used for ultra-deep foundation ditch tube well precipitation area water seal well device is related to.
Background
The foundation pit engineering is a general term of construction measures such as enclosure, support, precipitation, reinforcement, excavation, backfilling and the like which are adopted for excavating earthwork at an underground structure of the engineering and ensuring the safety of the foundation pit and the surrounding environment, and comprises investigation, design, construction, detection and monitoring. The foundation pit dewatering is a dewatering method in which well pipes are embedded inside and outside the foundation pit and mechanical equipment is used to pump water to lower the groundwater level. The well sealing is an important link in foundation pit dewatering engineering, aims to solve the problems of sealing of the dewatering well in the pit and local waterproofing of the engineering at the later stage of the dewatering engineering, and ensures that the dewatering well does not have the problems of water seepage, uplift and deep sinking in the engineering using process.
With the continuous development of urban construction, the depth of building engineering is continuously increased, and ultra-deep foundation pits are more and more. The deep well dewatering of the ultra-deep foundation pit is usually accompanied by high-head confined water, and the plugging difficulty of the deep well dewatering well is high due to the phenomena of large diameter, high water level, high water gushing speed and the like of the dewatering well.
In order to solve the problems and realize effective well sealing, the conventional well sealing method comprises the following steps: firstly, draining water in a precipitation well by using a submersible pump, closing and discarding the submersible pump when the water level line of precipitation reaches a set value, quickly injecting water glass glue into the precipitation well, and gradually blocking and reducing the drainage aperture of the precipitation well by utilizing the quick-setting property of the water glass glue; and finally, welding a water sealing cover plate on the wellhead of the dewatering well to complete well sealing, wherein the method can effectively solve the well sealing problem of the high confined water deep well dewatering well of the ultra-deep foundation pit, but has the following problems: the super deep foundation ditch engineering often is along with high flood head confined water, and the water level is higher when sealing the well at last, gushes water fastly, and it is more to go out water, and the apron in-process water level of sealing up in the welding continuously rises, often appears spilling the condition of apron, can't carry out the welding of taking water after the apron is flooded, and the shut-in difficulty is great, often appears the shut-in midway failure, shut-in quality is low, later stage seepage scheduling problem. For guaranteeing that the water level is in stable low water level in the precipitation well, prevent that the water level from rising in the precipitation well and influence the shut-in quality, at the shut-in-process, the immersible pump generally lasts the operation of drawing water, and the back that finishes of shut-in, the immersible pump is stayed in the precipitation well, can't realize that the immersible pump retrieves, forms the wasting of resources. Compared with common cement mortar, the water glass cement has high price and low environmental protection performance.
Disclosure of Invention
In order to achieve the purpose, the utility model provides a be used for ultra-deep foundation ditch tubular well precipitation area water seal well device, often appear when having solved the ultra-deep foundation ditch engineering shut-in that exists among the prior art that the shut-in is midway failed, the shut-in quality is low, the later stage seepage can't realize the immersible pump and retrieve, adopts the high price that sodium silicate glued, the low scheduling problem of feature of environmental protection.
In order to solve the technical problem, the utility model provides an adopted technical scheme is, a be used for ultra-deep foundation ditch tube well precipitation area water seal well device, include: a well pipe is arranged in the foundation pit, and the top of the foundation pit and the top of the well pipe are equal in height; the bottom of the well pipe is filled with coarse gravel, a lower well sealing cover plate is welded on the inner wall close to the top side of the well pipe, and quick-setting cement is filled in a space formed by the lower well sealing cover plate and the coarse gravel in the well pipe; the well pipe is provided with a variable cross-section steel sleeve along the height direction, the outer wall of the variable cross-section steel sleeve is provided with an upper water stop ring and a lower water stop ring, the left side and the right side of the inner wall of the variable cross-section steel sleeve are symmetrically provided with steel plate supports, and the bottom surface of each steel plate support is contacted with the top of the well pipe; an upper well sealing cover plate is welded at the top of the variable cross-section steel sleeve, and micro-expansion concrete is filled in a space formed by the variable cross-section steel sleeve and the lower well sealing cover plate;
a concrete cushion is arranged on the foundation pit, surrounds the lower water stop ring and is in contact with each surface of the lower water stop ring; a waterproof layer is arranged on the concrete cushion layer, the waterproof layer is arranged between the upper water stop ring and the lower water stop ring, a foundation pit bottom plate is arranged on the waterproof layer, and the foundation pit bottom plate surrounds the upper water stop ring and is in contact with each surface of the upper water stop ring; the concrete cushion layer, the waterproof layer, the foundation pit bottom plate and the left side and the right side of the foundation pit are flush, and the concrete cushion layer, the waterproof layer, the foundation pit bottom plate and the left side and the right side of the outer wall of the variable cross-section steel sleeve are in contact and flush; the top of foundation ditch bottom plate is higher than the top of last well-plugging cover board, packs the little expanded concrete in the space that foundation ditch bottom plate and variable cross section steel sleeve formed, and the little expanded concrete top is less than foundation ditch bottom plate top, sets up cement base infiltration crystallization waterproof coating on little expanded concrete, and cement base infiltration crystallization waterproof coating top and foundation ditch bottom plate top flush, lay waterproofing membrane on cement base infiltration crystallization waterproof coating.
Furthermore, the oxhorn which is contacted with the bottom surface of the lower well sealing cover plate is symmetrically welded on the inner wall of the well pipe in a left-right mode.
Further, the top of the coarse gravel is 1m away from the top of the well pipe, and the lower well sealing cover plate is 0.3m below the top of the well pipe.
Furthermore, a grouting opening, a water outlet, a movable cover plate, a bolt and a steel plate strip are arranged on the lower well sealing cover plate.
Furthermore, the upper water stop ring is distributed in a bilateral symmetry mode about the variable cross-section steel sleeve, and the lower water stop ring is distributed in a bilateral symmetry mode about the variable cross-section steel sleeve.
Furthermore, a layer of cement-based capillary crystalline waterproof coating is coated on the inner wall of the variable cross-section steel sleeve, and the cement-based capillary crystalline waterproof coating is below the steel plate support.
Further, the distance between the top of the micro-expansion concrete and the top of the foundation pit bottom plate is 100 mm.
The utility model has the advantages that: adopt the utility model discloses a well-sealing cover plate, because removable cover's existence during well-sealing cover plate under the welding, need not extract the hose that draws water and can accomplish transferring and the welding of well-sealing cover plate down, do not influence the suction pump and carry out the operation. By adopting the variable cross-section steel sleeve, the size of the well plugging steel sleeve is reduced, the welding area is reduced, the welding time during well plugging can be shortened, the well plugging is accelerated, and the material is saved. By adopting the drain pipe, the underground water can be discharged through the drain pipe when the underground water level continuously rises and the water is discharged more when the quick-setting cement is poured, so that the condition of overlarge water pressure in the well pipe is avoided.
The utility model has the advantages of simple structure, convenient operation, have the shut-in high quality, efficient, with low costs, green energy-concerving and environment-protective, safe and reliable, application scope is wide etc, can provide reference for the shut-in construction of similar foundation ditch engineering high water head confined water precipitation well.
The utility model discloses can realize taking the construction procedure of water seal well, retrieve the water pump behind the well-sealing, reduce the time of welding water seal apron. The utility model discloses can guarantee that it is higher at ground water level, go out water more flourishing, carry out the water seal well under the great condition of water pressure, guarantee the quality of well sealing, not produce the seepage phenomenon. The cyclic utilization of the water pump after well sealing can be realized.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic view of the water pumping device and the water pumping operation.
Fig. 3 is a schematic view of a grouting apparatus and a grouting operation.
Fig. 4a is a schematic structural diagram of the lower well-sealing cover plate when the movable cover plate is opened.
FIG. 4b is a schematic view of the structure of the lower well-sealing cover plate when the movable cover plate is closed.
In the figure, 1, a well pipe, 2, a foundation pit, 3, cement-based permeable crystallization waterproof coating, 4, a variable cross-section steel sleeve, 5, a lower water stop ring, 6, a concrete cushion layer, 7, a waterproof layer, 8, an upper water stop ring, 9, a foundation pit bottom plate, 10, a waterproof coiled material, 11, a grouting pipe, 12, an upper well sealing cover plate, 13, micro-expansion concrete, 14, a steel plate support, 15, a horn, 16, a lower well sealing cover plate, 161, a grouting port, 162, a water outlet, 163, a movable cover plate, 164, a bolt, 165, a steel plate strip, 17, quick setting cement, 18, coarse gravel, 19, a water pumping hose, 20, a self-suction water pump and 21, a high-pressure cement grouting machine.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
As shown in fig. 1, a water-logging device for a dewatering zone of an ultra-deep foundation pit pipe well comprises: a well pipe 1 is arranged in the foundation pit 2, and the top of the foundation pit 2 and the top of the well pipe 1 are equal in height; the bottom of the well pipe 1 is filled with coarse gravel 18, the inner wall of the side close to the top of the well pipe 1 is welded with a lower well-sealing cover plate 16, the inner wall of the well pipe 1 is welded with oxhorn 15 which is in contact with the bottom surface of the lower well-sealing cover plate 16 in a bilateral symmetry mode, and a space formed by the lower well-sealing cover plate 16 and the coarse gravel 18 in the well pipe 1 is filled with quick-setting cement 17; the top of the coarse gravel 18 is 1m away from the top of the well pipe 1, and the lower well sealing cover plate 16 is 0.3m below the top of the well pipe 1; the lower well-sealing cover plate 16 is provided with a grouting opening 161, a water outlet 162, a movable cover plate 163, a bolt 164 and a steel plate strip 165.
The variable cross-section water-cooling well pipe comprises a well pipe 1, a variable cross-section steel sleeve 4, an upper water stop ring 8 and a lower water stop ring 5, wherein the outer wall of the variable cross-section steel sleeve 4 is provided with the upper water stop ring 8 and the lower water stop ring 5, the upper water stop ring 8 is distributed in a left-right symmetrical mode relative to the variable cross-section steel sleeve 4, the lower water stop ring 5 is distributed in a left-right symmetrical mode relative to the variable cross-section steel sleeve 4, steel plate supports 14 are symmetrically arranged on the left side and the right side of the inner wall of the variable cross-section steel sleeve 4, the bottom surface of each steel plate support 14 is in contact with the top of; an upper well sealing cover plate 12 is welded at the top of the variable cross-section steel sleeve 4, and micro-expansion concrete 13 is filled in a space formed by the variable cross-section steel sleeve 4 and a lower well sealing cover plate 16.
A concrete cushion 6 is arranged on the foundation pit 2, and the concrete cushion 6 surrounds the lower water stop ring 5 and is in contact with each surface of the lower water stop ring 5; a waterproof layer 7 is arranged on the concrete cushion layer 6, the waterproof layer 7 is arranged between the upper water stop ring 8 and the lower water stop ring 5, a foundation pit bottom plate 9 is arranged on the waterproof layer 7, and the foundation pit bottom plate 9 surrounds the upper water stop ring 8 and is in contact with each surface of the upper water stop ring 8; the left and right sides of concrete cushion 6, waterproof layer 7, foundation ditch bottom plate 9 and foundation ditch 2 flush, and the left and right sides contact of concrete cushion 6, waterproof layer 7, foundation ditch bottom plate 9 and variable cross-section steel sleeve 4 outer wall and flush.
The top of foundation ditch bottom plate 9 is higher than the top of upper shaft sealing apron 12, packs the little expanded concrete 13 in the space that foundation ditch bottom plate 9 and variable cross section steel sleeve 4 formed, little expanded concrete 13 top apart from foundation ditch bottom plate 9 top 100mm sets up cement base infiltration crystallization waterproof coating 3 on little expanded concrete 13, 3 tops of cement base infiltration crystallization waterproof coating and foundation ditch bottom plate 9 tops flush, lay waterproof coiled material 10 on cement base infiltration crystallization waterproof coating 3.
A use method of the water seal well device for the dewatering zone of the ultra-deep foundation pit pipe well comprises the following steps: as shown in fig. 2, a self-priming water pump 20 is placed above the foundation pit 2 during well sealing, the self-priming water pump 20 pumps water inside the well pipe 1 through a water pumping hose 19, meanwhile, coarse gravel 18 is backfilled into the well pipe 1, attention is paid to avoiding the water pumping hose 19 during backfilling of the coarse gravel 18, and the water pumping hose 19 is above the coarse gravel 18 (as the water is high-pressure water, once the water pumping hose 19 is pulled out, the water level rises, the self-priming water pump 20 and the water pumping hose 19 need to be in place during backfilling of the coarse gravel 18, and water pumping operation is carried out at the same time); and backfilling the coarse gravel 18 to a position 1m away from the top of the well pipe 1, and continuing pumping to keep the water level in the well pipe 1 at a stable low water level (the stable low water level means that the water in the well pipe 1 is 0.7m away from the top of the well pipe 1), wherein the impact force of the water is weakened to a certain extent by the coarse gravel 18.
The lower well-sealing cover plate 16 is prepared to be in place, as shown in fig. 4a, the movable cover plate 163 is opened, the pumping hose 19 of the self-priming pumping pump 20 passes through the opening of the movable cover plate 163, the lower well-sealing cover plate 16 is lowered to a preset position along the pumping hose 19 (the oxhorn 15 is 0.3m away from the top of the well pipe 1, the oxhorn 15 is arranged to support the lower well-sealing cover plate 16 and control the height of the lower well-sealing cover plate 16, so that the lower well-sealing cover plate 16 is 0.3m below the top of the well pipe 1), and meanwhile, the self-priming pumping pump 20 keeps pumping. And when the water level line in the well pipe 1 is stabilized to a position at least 0.7m away from the top of the well pipe 1, carrying out water-carrying welding on the lower well-sealing cover plate 16, and waiting for the welding seam to be cooled. After the weld has cooled, the self-priming suction pump 20 is turned off to quickly lift the suction hose 19 out of the hole of the removable cover 163, as shown in fig. 4b, the removable cover 163 is closed, and the removable cover 163 is reinforced with bolts 164 and steel strips 165.
As shown in fig. 3, a high-pressure cement grouting machine 21 is placed above the foundation pit 2, a grouting port 161 is opened (when the grouting port 161 is not used, the grouting port 161 is in a closed state), a grouting pipe 11 of the high-pressure cement grouting machine 21 injects quick-setting cement 17 into the well pipe 1 through the grouting port 161, a drainage port 162 is opened (when the drainage port 162 is not used, the drainage port 162 is in a closed state), and a drainage pipe is communicated with the drainage port 162; the density of the quick-setting cement 17 is higher than that of water during injection, so the quick-setting cement 17 is settled to the lower part, the water in the well pipe 1 is above the quick-setting cement 17, the quick-setting cement 17 continuously gushes along with the injection of the high-pressure cement grouting machine 21, and finally, all accumulated water is ejected out of the well pipe 1 from a drainage pipe through a drainage outlet 162 on the lower well sealing cover plate 16. After the thick cement mortar overflows from the drainage pipe, the valve of the drainage pipe is closed, the valve of the grouting pipe 11 is closed at the same time, the high-pressure cement grouting machine 21 stops grouting, the grouting pipe 11 and the drainage pipe are quickly drawn out, and the grouting opening 161 and the drainage opening 162 are in a closed state.
Lowering the variable cross-section steel sleeve 4 until the top of the well casing 1 contacts the steel plate support 14 (a small amount of moderate excavation can be performed before lowering the variable cross-section steel sleeve 4. due to the fact that the foundation pit 2 is rich in underground water and not large in soil body strength, the resistance applied when the variable cross-section steel sleeve 4 is inserted is small, and the insertion of the variable cross-section steel sleeve 4 can be guaranteed through the moderate excavation); a layer of cement-based capillary crystalline waterproof coating 3 is coated below a steel plate support 14 of the inner wall of the variable cross-section steel sleeve 4, micro-expansion concrete 13 is filled into a space formed by the variable cross-section steel sleeve 4 and a lower well-plugging cover plate 16 through a notch in the top of the variable cross-section steel sleeve 4, the micro-expansion concrete 13 is filled to be flush with the notch in the variable cross-section steel sleeve 4, and an upper well-plugging cover plate 12 is welded at the notch in the top of the variable cross-section steel sleeve 4.
Symmetrically welding lower water stop rings 5 at the left side and the right side of a variable cross-section steel sleeve 4 above the foundation pit 2, pouring a concrete cushion 6, and enabling the concrete cushion 6 to surround the lower water stop rings 5 and to be in contact with all surfaces of the lower water stop rings 5; a waterproof layer 7 is constructed and arranged on the concrete cushion layer 6, and the waterproof layer 7 is arranged between the upper water stop ring 8 and the lower water stop ring 5; the left side and the right side of the variable cross-section steel sleeve 4 above the waterproof layer 7 are symmetrically welded with upper water stopping rings 8; after the upper water stop ring 8 is welded, a foundation pit bottom plate 9 is poured on the waterproof layer 7, and the foundation pit bottom plate 9 surrounds the upper water stop ring 8 and is in contact with each surface of the upper water stop ring 8; the concrete cushion 6, the waterproof layer 7, the foundation pit bottom plate 9 and the left side and the right side of the foundation pit 2 are flush, and the concrete cushion 6, the waterproof layer 7, the foundation pit bottom plate 9 and the left side and the right side of the outer wall of the variable cross-section steel sleeve 4 are in contact and flush; the top of the foundation pit bottom plate 9 poured is higher than the top of the upper well sealing cover plate 12, micro-expansion concrete 13 is filled in a space formed by the foundation pit bottom plate 9 and the variable cross-section steel sleeve 4, maintenance is carried out according to the specified requirements (the welding line for welding the upper well sealing cover plate 12 when the micro-expansion concrete 13 is filled is cooled), the top of the micro-expansion concrete 13 is 100mm away from the top of the foundation pit bottom plate 9, when the micro-expansion concrete 13 meets the specified requirements of maintenance, the cement-based permeable crystalline waterproof coating 3 is arranged on the micro-expansion concrete 13, the top of the cement-based permeable crystalline waterproof coating 3 is flush with the top of the foundation pit bottom plate 9, a waterproof coiled material 10 is laid on the cement-based permeable crystalline waterproof coating 3, and well sealing is completed (the area of the waterproof coiled material 10 is larger.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention shall fall within the protection scope of the present invention.
Claims (7)
1. The utility model provides a be used for ultra-deep foundation ditch tubular well precipitation area water seal well device which characterized in that includes: the foundation pit (2), the well pipe (1) is arranged in the foundation pit (2), and the tops of the foundation pit (2) and the well pipe (1) are equal in height; the bottom of the well pipe (1) is filled with coarse gravel (18), a lower well sealing cover plate (16) is welded on the inner wall close to the top side of the well pipe (1), and quick-setting cement (17) is filled in a space formed by the lower well sealing cover plate (16) and the coarse gravel (18) in the well pipe (1); the variable cross-section steel sleeve (4) is installed on the well pipe (1) along the height direction, the upper water stop ring (8) and the lower water stop ring (5) are arranged on the outer wall of the variable cross-section steel sleeve (4), steel plate supports (14) are symmetrically arranged on the left side and the right side of the inner wall of the variable cross-section steel sleeve (4), and the bottom surface of each steel plate support (14) is in contact with the top of the well pipe (1); an upper well sealing cover plate (12) is welded at the top of the variable cross-section steel sleeve (4), and a space formed by the variable cross-section steel sleeve (4) and a lower well sealing cover plate (16) is filled with micro-expansion concrete (13);
a concrete cushion (6) is arranged on the foundation pit (2), and the concrete cushion (6) surrounds the lower water stop ring (5) and is in contact with each surface of the lower water stop ring (5); a waterproof layer (7) is arranged on the concrete cushion layer (6), the waterproof layer (7) is arranged between the upper water stop ring (8) and the lower water stop ring (5), a foundation pit bottom plate (9) is arranged on the waterproof layer (7), and the foundation pit bottom plate (9) surrounds the upper water stop ring (8) and is in contact with each surface of the upper water stop ring (8); the concrete cushion (6), the waterproof layer (7), the foundation pit bottom plate (9) and the left side and the right side of the foundation pit (2) are flush, and the concrete cushion (6), the waterproof layer (7), the foundation pit bottom plate (9) and the left side and the right side of the outer wall of the variable cross-section steel sleeve (4) are in contact and flush; the top of foundation ditch bottom plate (9) is higher than the top of last shut-in cover board (12), pack micro-expansion concrete (13) in the space that foundation ditch bottom plate (9) and variable cross section steel sleeve (4) formed, micro-expansion concrete (13) top is less than foundation ditch bottom plate (9) top, set up cement base infiltration crystallization waterproof coating (3) on micro-expansion concrete (13), cement base infiltration crystallization waterproof coating (3) top and foundation ditch bottom plate (9) top flush, lay waterproofing membrane (10) on cement base infiltration crystallization waterproof coating (3).
2. The well plugging device for the water lowering belt of the ultra-deep foundation pit pipe well is characterized in that the oxhorn (15) contacted with the bottom surface of the lower well plugging cover plate (16) is welded on the inner wall of the well pipe (1) in a bilateral symmetry manner.
3. A water logging device for a water carrying belt of an ultra deep foundation pit pipe well according to claim 1, characterized in that the top of the coarse gravel (18) is at a distance of 1m from the top of the well pipe (1), and the lower well sealing cover plate (16) is 0.3m below the top of the well pipe (1).
4. The water well sealing device for the dewatering belt of the ultra-deep foundation pit pipe well is characterized in that a grouting opening (161), a water outlet (162), a movable cover plate (163), a bolt (164) and a steel plate strip (165) are arranged on the lower well sealing cover plate (16).
5. The water lowering belt water seal well device for the ultra-deep foundation pit pipe well is characterized in that the upper water stop ring (8) is distributed in a left-right symmetrical mode about the variable cross-section steel sleeve (4), and the lower water stop ring (5) is distributed in a left-right symmetrical mode about the variable cross-section steel sleeve (4).
6. The water lowering belt water seal well device for the ultra-deep foundation pit pipe well according to claim 1, characterized in that the inner wall of the variable cross-section steel sleeve (4) is coated with a layer of cement-based permeable crystalline waterproof coating (3), and the cement-based permeable crystalline waterproof coating (3) is arranged below the steel plate support (14).
7. The water logging device for the dewatering belt of the ultra-deep foundation pit pipe well according to claim 1, wherein the top of the micro-expansion concrete (13) is 100mm away from the top of the foundation pit bottom plate (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021066642.9U CN212506349U (en) | 2020-06-11 | 2020-06-11 | Water-logging well sealing device for water-lowering zone of ultra-deep foundation pit pipe well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021066642.9U CN212506349U (en) | 2020-06-11 | 2020-06-11 | Water-logging well sealing device for water-lowering zone of ultra-deep foundation pit pipe well |
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| Publication Number | Publication Date |
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| CN212506349U true CN212506349U (en) | 2021-02-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021066642.9U Expired - Fee Related CN212506349U (en) | 2020-06-11 | 2020-06-11 | Water-logging well sealing device for water-lowering zone of ultra-deep foundation pit pipe well |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114718099A (en) * | 2022-03-21 | 2022-07-08 | 中国五冶集团有限公司 | Well plugging device for dewatering well |
| CN115182371A (en) * | 2022-08-24 | 2022-10-14 | 中建七局(上海)有限公司 | Plugging structure of dewatering pipe well and construction method thereof |
-
2020
- 2020-06-11 CN CN202021066642.9U patent/CN212506349U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114718099A (en) * | 2022-03-21 | 2022-07-08 | 中国五冶集团有限公司 | Well plugging device for dewatering well |
| CN115182371A (en) * | 2022-08-24 | 2022-10-14 | 中建七局(上海)有限公司 | Plugging structure of dewatering pipe well and construction method thereof |
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Granted publication date: 20210209 |