CN212129150U - Deep basal pit precipitation well block structure - Google Patents
Deep basal pit precipitation well block structure Download PDFInfo
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- CN212129150U CN212129150U CN202020753587.4U CN202020753587U CN212129150U CN 212129150 U CN212129150 U CN 212129150U CN 202020753587 U CN202020753587 U CN 202020753587U CN 212129150 U CN212129150 U CN 212129150U
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Abstract
The utility model particularly relates to a deep basal pit precipitation well block structure has solved current flange shutoff method and has had seepage, secondary shutoff to waste time and energy and the problem that the shutoff effect is difficult to guarantee after the shutoff easily appears in using. A well head of a dewatering well is sleeved with a steel sleeve, the bottom of the steel sleeve is inserted into a horizontal cushion layer, and a water stopping wing ring is fixedly sleeved in the middle of the outer side wall; a waterproof layer is paved on the upper surface of the horizontal cushion layer and the outer side wall of the steel sleeve together, and a sealing assembly is arranged on the upper end surface of the steel sleeve; the inner bottom wall of the dewatering well is paved with a stone layer, the upper surface of the stone layer is provided with a hollow water stop plug, and a first impervious concrete block is arranged between the hollow water stop plug and the sealing component. The utility model discloses a with the purpose of the firm shutoff of precipitation well, impervious performance is good, and waterproof performance is excellent, can effectively avoid appearing the problem of seepage behind the precipitation well shutoff, applicable bearing or the shutoff of aquifer precipitation well in the great foundation ditch of water yield.
Description
Technical Field
The utility model relates to a block structure for building engineering specifically is a deep basal pit dewatering well block structure.
Background
In foundation pit engineering, in order to ensure safe construction operation of construction machinery and workers in a foundation pit, underground water is generally lowered to a construction working surface of below 0.5-1 m. Arranging the precipitation well at the periphery of the deep foundation pit can reduce the underground water level of the foundation pit, but the precipitation effect of the foundation pit with large area and large span of the foundation pit is poor. Therefore, a dewatering well in the foundation pit needs to be arranged at a proper position of the deep foundation pit according to the geological survey data and is blocked. At present, a precipitation well in a foundation pit is mostly plugged by an installation flange.
However, practice shows that the existing flange plugging method has the following problems in application: the plugging effect is not good, leakage is easy to occur after plugging, secondary plugging is needed, time and labor are wasted, the construction cost is greatly increased, and the quality and the effect of the secondary plugging are difficult to guarantee.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a solve present flange shutoff method and exist leakage, secondary shutoff easily appear after the shutoff in using, waste time and energy and the problem that the shutoff effect is difficult to guarantee, provide a deep basal pit precipitation well block structure.
The utility model discloses an adopt following technical scheme to realize:
a plugging structure of a dewatering well of a deep foundation pit comprises a structural bottom plate and a dewatering well vertically arranged below the structural bottom plate, wherein a horizontal cushion layer is arranged at the top end part of the outer side wall of the dewatering well, and a structural concrete layer is arranged between the horizontal cushion layer and the structural bottom plate; a steel sleeve positioned below the structural bottom plate is sleeved at the wellhead of the dewatering well, the bottom of the steel sleeve is inserted into the horizontal cushion layer, and a horizontally-placed water stopping wing ring is fixedly sleeved in the middle of the outer side wall; a waterproof layer positioned below the water stop wing ring is paved on the upper surface of the horizontal cushion layer and the outer side wall of the steel sleeve together, and a waterproof protective layer is paved between the horizontal part of the waterproof layer and the structural concrete layer;
the upper end surface of the steel sleeve is provided with a sealing assembly; a stone layer is laid on the inner bottom wall of the dewatering well, a hollow water stop plug is arranged on the upper surface of the stone layer, and the outer side wall of the hollow water stop plug is tightly attached to the inner side wall of the dewatering well; a first impervious concrete block is arranged between the hollow water stop plug and the sealing component.
During construction, the method is realized by adopting the following steps: a. fixing a water stopping wing ring in the middle of the outer side wall of the steel sleeve, sleeving the steel sleeve at a wellhead of a precipitation well, laying a horizontal cushion layer at the top end part of the outer side wall of the precipitation well, laying a waterproof layer on the upper surface of the horizontal cushion layer and the outer side wall of the steel sleeve, and laying a waterproof protective layer on the upper surface of the horizontal part of the waterproof layer; b. after the periphery of the top end part of the steel sleeve is protected by a formwork, a structural concrete layer is cast in situ between the waterproof protective layer and the structural bottom plate; c. the water pumping pipe of the self-priming pump is stretched into the steel sleeve and the precipitation well, the self-priming pump is started, water is pumped while stones are filled into the precipitation well to form a stone layer, after the stone layer reaches a certain height, the water pumping pipe is pulled out, the hollow water stop plug is rapidly plugged into the precipitation well, and the hollow water stop plug is rapidly inflated, so that the outer side wall of the hollow water stop plug is tightly attached to the inner side wall of the precipitation well; d. casting impervious concrete in situ in the steel sleeve and the precipitation well to form a first impervious concrete block, so that the upper end surface of the first impervious concrete block is flush with the upper end surface of the steel sleeve; e. installing a sealing assembly, and casting the rest part of the structural concrete layer in situ so that the upper surface of the structural concrete layer is flush with the structural bottom plate. The utility model overcomes there is seepage, secondary shutoff to waste time and energy and the problem that the shutoff effect is difficult to guarantee easily to appear after the shutoff in using in current flange shutoff method.
The sealing assembly comprises a lower flange plate fixed on the upper end surface of the steel sleeve, an upper flange cover arranged above the lower flange plate in parallel and a rubber gasket clamped between the upper flange plate and the lower flange plate, and the upper flange plate, the upper flange cover and the rubber gasket are connected through a plurality of high-strength bolts.
The utility model provides a deep basal pit precipitation well block structure, still includes and sets up in the second anti-seepage concrete piece in the steel casing pipe top portion outside along circumference, and the upper surface of second anti-seepage concrete piece flushes with the upper surface of structure bottom plate.
The structural design can obviously enhance the anti-permeability performance of the wellhead of the dewatering well and prevent the dewatering well from leaking after plugging.
The bending part of the waterproof layer is of a round angle structure, and a waterproof reinforcing layer located below the waterproof protective layer is arranged on the outer side of the bending part.
This structural design has effectively increased the waterproof performance of steel casing and precipitation well junction, prevents that the junction from appearing the infiltration or leaking, erodees structure concrete layer.
The hollow water stop plug is made of rubber, and the upper side wall of the hollow water stop plug is provided with an inflation hole.
The second impervious concrete block has a higher impermeability rating than the first impervious concrete block.
This structural design is on the basis of guaranteeing the shutoff effect, and the impervious grade of reasonable selection different positions concrete has further reduced construction cost.
The diameter of the stones of the stone layer is 5mm, and the distance between the upper surface of the stone layer and the lower surface of the structural bottom plate is 2-3 m.
This structural design has effectively improved the utility model discloses a shutoff effect has guaranteed the security of construction machinery and workman's operation in the foundation ditch.
The horizontal cushion layer is made of concrete; the waterproof layer and the waterproof reinforcing layer are both made of waterproof coiled materials.
The utility model has the advantages of reasonable design reliably, the purpose of the firm shutoff of precipitation well has been realized, and impermeability performance is good, the problem of seepage appears after can effectively avoiding the precipitation well shutoff, adopt multilayer waterproof construction simultaneously, waterproof performance is excellent, can effectively avoid leaking or seeping water and produce destructive action to each structural layer, the security of construction machinery and workman's operation in the foundation ditch has been ensured, furthermore, the efficiency of construction has effectively been improved, construction cost is reduced, it is simple and easy to have a structure, the advantage of convenient construction, it is applicable in the shutoff of bearing pressure or aquifer precipitation well in the great foundation ditch of water yield.
Drawings
Fig. 1 is a schematic structural diagram of the present invention;
fig. 2 is a state reference diagram of the utility model when pumping water in construction.
In the figure, 1-a structural bottom plate, 2-a dewatering well, 3-a horizontal cushion layer, 4-a structural concrete layer, 5-a steel sleeve, 6-a water-stopping wing ring, 7-a waterproof layer, 8-a waterproof protective layer, 9-a stone layer, 10-a hollow water-stopping plug, 11-a first impervious concrete block, 12 a-a lower flange plate, 12 b-an upper flange cover, 12 c-a rubber gasket, 12 d-a high-strength bolt, 13-a second impervious concrete block, 14-a waterproof reinforcing layer, 15-a self-priming pump and 16-a water suction pipe.
Detailed Description
A deep foundation pit dewatering well plugging structure comprises a structural bottom plate 1 and a dewatering well 2 vertically arranged below the structural bottom plate 1, wherein a horizontal cushion layer 3 is arranged at the top end part of the outer side wall of the dewatering well 2, and a structural concrete layer 4 is arranged between the horizontal cushion layer 3 and the structural bottom plate 1; a steel sleeve 5 positioned below the structural bottom plate 1 is sleeved on a wellhead of the dewatering well 2, the bottom of the steel sleeve 5 is inserted into the horizontal cushion 3, and a water stopping wing ring 6 horizontally arranged is fixedly sleeved in the middle of the outer side wall; a waterproof layer 7 positioned below the water-stopping wing ring 6 is paved on the upper surface of the horizontal cushion layer 3 and the outer side wall of the steel sleeve 5 together, and a waterproof protective layer 8 is paved between the horizontal part of the waterproof layer 7 and the structural concrete layer 4;
the upper end surface of the steel sleeve 5 is provided with a sealing assembly; a stone layer 9 is laid on the inner bottom wall of the dewatering well 2, a hollow water stop plug 10 is arranged on the upper surface of the stone layer 9, and the outer side wall of the hollow water stop plug 10 is tightly attached to the inner side wall of the dewatering well 2; a first impervious concrete block 11 is arranged between the hollow water stop plug 10 and the sealing component.
The sealing assembly comprises a lower flange plate 12a fixed on the upper end surface of the steel sleeve 5, an upper flange cover 12b arranged above the lower flange plate 12a in parallel and a rubber gasket 12c clamped between the lower flange plate and the upper flange cover, the upper flange cover and the rubber gasket are connected through a plurality of high-strength bolts 12 d.
The utility model provides a deep basal pit precipitation well block structure, still includes and sets up in the second anti-seepage concrete piece 13 in the steel casing 5 top portion outside along circumference, and the upper surface of second anti-seepage concrete piece 13 flushes with the upper surface of structure bottom plate 1.
The bending part of the waterproof layer 7 is a round angle structure, and a waterproof reinforcing layer 14 positioned below the waterproof protective layer 8 is arranged on the outer side of the bending part.
The hollow water stop plug 10 is made of rubber, and the upper side wall of the hollow water stop plug is provided with an inflation hole.
The second impermeable concrete block 13 has an impermeability rating higher than that of the first impermeable concrete block 11.
The diameter of the stones of the stone layer 9 is 5mm, and the distance between the upper surface of the stone layer 9 and the lower surface of the structural bottom plate 1 is 2-3 m.
The horizontal cushion layer 3 is made of concrete; the waterproof layer 7 and the waterproof reinforcing layer 14 are both made of waterproof coiled materials.
In the specific implementation process, the well wall of the dewatering well 2 is made of a sand-free cement well pipe; the distance between the upper end surface of the steel sleeve 5 and the upper surface of the structural bottom plate is 10 cm; the waterproof protective layer 8 is made of concrete; the first impervious concrete block 11 is made of quick-setting micro-expansive impervious concrete; the lower flange plate 12a is welded to the upper end face of the steel sleeve 5 before construction; the power of the self-priming pump 15 and the pipe diameter of the water pumping pipe 16 in construction are determined according to the overflow amount of underground water.
Claims (8)
1. A deep foundation pit dewatering well plugging structure comprises a structural bottom plate (1) and a dewatering well (2) vertically arranged below the structural bottom plate (1), wherein a horizontal cushion layer (3) is arranged at the top end part of the outer side wall of the dewatering well (2), and a structural concrete layer (4) is arranged between the horizontal cushion layer (3) and the structural bottom plate (1); the method is characterized in that: a steel sleeve (5) positioned below the structural bottom plate (1) is sleeved on a well mouth of the dewatering well (2), the bottom of the steel sleeve (5) is inserted into the horizontal cushion (3), and a horizontally-arranged water stopping wing ring (6) is fixedly sleeved in the middle of the inner side wall and the outer side wall of the horizontal cushion (3); a waterproof layer (7) positioned below the water stop wing ring (6) is paved on the upper surface of the horizontal cushion layer (3) and the outer side wall of the steel sleeve (5), and a waterproof protective layer (8) is paved between the horizontal part of the waterproof layer (7) and the structural concrete layer (4);
a sealing component is arranged on the upper end surface of the steel sleeve (5); a stone layer (9) is laid on the inner bottom wall of the dewatering well (2), a hollow water stop plug (10) is arranged on the upper surface of the stone layer (9), and the outer side wall of the hollow water stop plug (10) is tightly attached to the inner side wall of the dewatering well (2); a first impervious concrete block (11) is arranged between the hollow water stop plug (10) and the sealing component.
2. The deep foundation pit dewatering well plugging structure of claim 1, wherein: the sealing assembly comprises a lower flange plate (12 a) fixed on the upper end face of the steel sleeve (5), an upper flange cover (12 b) arranged above the lower flange plate (12 a) in parallel and a rubber gasket (12 c) clamped between the lower flange plate and the upper flange cover, and the lower flange cover, the upper flange cover and the rubber gasket are connected through a plurality of high-strength bolts (12 d).
3. The deep foundation pit dewatering well plugging structure of claim 1, wherein: the anti-seepage concrete block structure is characterized by further comprising a second anti-seepage concrete block (13) arranged on the outer side of the top end portion of the steel sleeve (5) along the circumferential direction, and the upper surface of the second anti-seepage concrete block (13) is flush with the upper surface of the structure bottom plate (1).
4. The deep foundation pit dewatering well plugging structure of claim 1, wherein: the bending part of the waterproof layer (7) is of a round angle structure, and a waterproof reinforcing layer (14) positioned below the waterproof protective layer (8) is arranged on the outer side of the bending part.
5. The deep foundation pit dewatering well plugging structure of claim 1, wherein: the hollow water stop plug (10) is made of rubber, and the upper side wall of the hollow water stop plug is provided with an inflation hole.
6. The deep foundation pit dewatering well plugging structure of claim 3, wherein: the second impermeable concrete block (13) has an impermeable grade higher than that of the first impermeable concrete block (11).
7. The deep foundation pit dewatering well plugging structure of claim 1, wherein: the diameter of stones of the stone layer (9) is 5mm, and the distance between the upper surface of the stone layer (9) and the lower surface of the structural bottom plate (1) is 2-3 m.
8. The deep foundation pit dewatering well plugging structure of claim 4, wherein: the horizontal cushion layer (3) is made of concrete; the waterproof layer (7) and the waterproof reinforcing layer (14) are both made of waterproof coiled materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020753587.4U CN212129150U (en) | 2020-05-09 | 2020-05-09 | Deep basal pit precipitation well block structure |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020753587.4U CN212129150U (en) | 2020-05-09 | 2020-05-09 | Deep basal pit precipitation well block structure |
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| CN212129150U true CN212129150U (en) | 2020-12-11 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113700051A (en) * | 2021-10-29 | 2021-11-26 | 山东三箭建设工程股份有限公司 | Anti-floating pressure relief hole plugging structure for underground building and construction method thereof |
| CN114045849A (en) * | 2021-09-30 | 2022-02-15 | 珠海十字门中央商务区建设控股有限公司 | Foundation pit high-temperature bedrock crack water drainage and plugging structure and method |
| 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
- 2020-05-09 CN CN202020753587.4U patent/CN212129150U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114045849A (en) * | 2021-09-30 | 2022-02-15 | 珠海十字门中央商务区建设控股有限公司 | Foundation pit high-temperature bedrock crack water drainage and plugging structure and method |
| CN113700051A (en) * | 2021-10-29 | 2021-11-26 | 山东三箭建设工程股份有限公司 | Anti-floating pressure relief hole plugging structure for underground building and construction method thereof |
| CN113700051B (en) * | 2021-10-29 | 2022-02-22 | 山东三箭建设工程股份有限公司 | Anti-floating pressure relief hole plugging structure for underground building and construction method thereof |
| 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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