CN204940314U - A kind of bellend pressure reduction well and deep foundation ditch structure thereof - Google Patents
A kind of bellend pressure reduction well and deep foundation ditch structure thereof Download PDFInfo
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- CN204940314U CN204940314U CN201520488180.2U CN201520488180U CN204940314U CN 204940314 U CN204940314 U CN 204940314U CN 201520488180 U CN201520488180 U CN 201520488180U CN 204940314 U CN204940314 U CN 204940314U
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- well
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- dewatering
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Abstract
The utility model discloses a kind of bellend pressure reduction well, comprise dewatering well and be arranged on the well casing in dewatering well, wherein, diameter bottom dewatering well is greater than the diameter on dewatering well top, the diameter of the chimney filter of well casing is greater than the diameter on well casing top, the retaining energy of individual well and capacity of outlet water is increased, can reduce the quantity of pressure reduction well, or reduce the degree of depth of pressure reduction well, save precipitation cost.And also disclose the deep foundation ditch structure that have employed above-mentioned bellend pressure reduction well, because the diameter bottom dewatering well is greater than the diameter on dewatering well top, the diameter of the chimney filter of well casing is greater than the diameter on well casing top, the ground-connecting-wall of deep foundation ditch and the degree of depth of water-stop curtain are also decreased, thus significantly can reduce construction cost.
Description
Technical field
The utility model relates to building foundation engineering foundation pit dewatering technical field, relates in particular to a kind of bellend pressure reduction well and deep foundation ditch structure thereof.
Background technology
In the development process of the underground space, need before its excavation of foundation pit to carry out foundation pit dewatering, foundation pit dewatering is then the pith of foundation pit construction, the success or not of foundation pit dewatering, directly can have influence on the progress of whole engineering, cost and quality, more can have influence on the safe handling of engineering after building up, that is therefore done by foundation pit dewatering project more convenient, more efficient, more economically seems particularly important.
Foundation pit dewatering is that ensure construction safety and workmanship and the requisite measure that extensively adopts, conventional method has gutter drainage and well-points dewatering two kinds for getting rid of underground water interference in construction.And about the multiple method that is furnished with of foundation pit dewatering gang of wells, according to different geological conditionss, geographical situation has different arrangement forms, but obviously, the quantity of foundation pit dewatering well is more, and well spacing is more intensive, bottom depth is larger, pump-out is more, and precipitation efficiency is higher, but the cost also had needed for foundation pit dewatering simultaneously increased with it, especially after well depth strengthens, diaphragm wall, the increase of water-stop curtain cost, simultaneously the well infiltration of ambient gradient problem such as whether can also to be guaranteed all there will be.People always wish to obtain under given conditions meeting desirable design scheme in Technological Economy in the layout of foundation pit dewatering well as far as possible, therefore how reasonably to arrange the number of precipitation gang of wells, position, spacing and reasonably determine the problem that the bottom depth of dewatering well has become designers in dewatering project design to have to focus on to consider with well radius and well casing length with radius.
A correct deep-foundation pit engineering dewatering design, should ensure that whole foundation ditch groundwater table drops to the groundwater table of requirement, ensure the safety of foundation ditch again.Under the prerequisite of safety, design is wanted rationally, again can saving construction cost, convenient construction, the reduction of erection time.Therefore, the optimal design of deep-foundation pit engineering precipitation is mainly carried out from following several respects:
(1) feasibility of the feasibility of technology, advance and construction technology; (2) economic benefit; (3) ambient influnence.
Utility model content
Main purpose of the present utility model is to provide a kind of bellend pressure reduction well, deep foundation ditch structure and construction method thereof, in order to improve the water-holding capacity of dewatering well, and improves individual well capacity of outlet water, the water yield of single port pressure reduction well is reached maximization.Under the prerequisite that Pit Discharge is constant, reduce the quantity of pressure reduction well, or reduce the degree of depth of pressure reduction well, save precipitation cost, thus reduce cost and the accelerating construction progress of integrated engineering.
For achieving the above object, the utility model provides a kind of bellend pressure reduction well on the one hand, comprising:
The dewatering well being arranged on below earth's surface and the well casing be arranged in described dewatering well;
Described dewatering well comprises bottom dewatering well top and dewatering well;
Described well casing comprises well head, well casing top, chimney filter and sediment tube from top to bottom successively, and described well head is higher than described earth's surface; Fill cohesive soil, clay ball successively from top to bottom between described well casing top and described dewatering well top, between bottom described chimney filter, sediment tube and described dewatering well, fill gravel;
Wherein, the diameter bottom described dewatering well is greater than the diameter on described dewatering well top, and the diameter of described chimney filter is greater than the diameter on described well casing top.
Preferably, the diameter bottom described dewatering well is all consistent from top to bottom, expands in rule relative to described dewatering well top.
Preferably, the diameter bottom described dewatering well is inconsistent from top to bottom, is irregular expansion relative to described dewatering well top.
Preferably, the diameter of described chimney filter is all consistent from top to bottom, expands in rule relative to described well casing top.
Preferably, the diameter of described chimney filter increases from top to bottom gradually, is trapezoidal expansion relative to described well casing top.
Preferably, the diameter of described chimney filter first increases from top to bottom and reduces, is that spindle expands relative to described well casing top.
Preferably, the diameter on described dewatering well top is 650mm.
Preferably, the external diameter on described well casing top is 273mm, and the external diameter of described chimney filter is 500mm ~ 550mm.
Preferably, described well head is higher than described earth's surface more than 0.5m.
Preferably, the material on described well casing top is welded steel pipe, and its thickness is 4mm.
Preferably, described chimney filter is circular hole filter pipe, and filter pipe is coated with two-layer 30 order ~ 40 object nylon leaching nets.
Preferably, the diameter of described sediment tube is identical with the diameter of described filter pipe, and its length is 1.00m, and the end mouth of described sediment tube is shut with iron plate.
Meanwhile, for achieving the above object, the utility model also provides a kind of deep foundation ditch structure, comprises above-mentioned bellend pressure reduction well.
The utility model, owing to adopting above technical scheme, makes it compared with prior art, has following advantage and good effect:
1) the bellend pressure reduction well that provides of the utility model, owing to increasing the diameter bottom dewatering well, the water-holding capacity of individual well is increased, thus under the constant prerequisite of Pit Discharge, the quantity of pressure reduction well can be reduced, or reduce the degree of depth of pressure reduction well, save precipitation cost, thus reduce cost and the accelerating construction progress of integrated engineering.
2) the bellend pressure reduction well that provides of the utility model, owing to increasing the diameter of chimney filter, single well capacity is increased, thus under the constant prerequisite of Pit Discharge, the quantity of pressure reduction well can be reduced, or reduce the degree of depth of pressure reduction well, save precipitation cost, thus reduce cost and the accelerating construction progress of integrated engineering; Meanwhile, the ground-connecting-wall of deep foundation ditch and the degree of depth of water-stop curtain are also decreased, thus significantly can reduce construction cost.
Accompanying drawing explanation
Two kinds of bottoms of the dewatering well of the bellend pressure reduction well that Figure 1A to Figure 1B provides for the utility model embodiment expand the cross-sectional view of form;
The cross-sectional view of the well casing of the bellend pressure reduction well that Fig. 2 A provides for the utility model embodiment;
The plane structure schematic diagram of the chimney filter of the bellend pressure reduction well that Fig. 2 B provides for the utility model embodiment;
The overall structure schematic diagram of the bellend pressure reduction well that Fig. 3 provides for the utility model embodiment;
Three kinds of chimney filter form cross-sectional view of the well casing of the bellend pressure reduction well that Fig. 4 A to Fig. 4 C provides for the utility model embodiment;
The overall structure schematic diagram of the deep foundation ditch that Fig. 5 provides for the utility model embodiment.
Detailed description of the invention
In order to make the purpose of this utility model, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein only for explaining the utility model, and be not used in restriction the utility model.
Please refer to Figure 1A to Fig. 3, the bellend pressure reduction well that the utility model provides, comprising:
The dewatering well 100 being arranged on below earth's surface and the well casing be arranged in dewatering well 100
200；
Dewatering well 100 to comprise bottom dewatering well top 101 and dewatering well 102;
Well casing 200 comprises well head 201, well casing top 202, chimney filter 203 and sediment tube 204 from top to bottom successively, and well head 201 is higher than earth's surface; Fill cohesive soil 301, clay ball 302 successively from top to bottom between well casing top 202 and dewatering well top 101, bottom chimney filter 203, sediment tube 204 and dewatering well, between 102, fill gravel 303;
Wherein, bottom dewatering well, the diameter of 102 is greater than the diameter on dewatering well top 101, and the diameter of chimney filter 203 is greater than the diameter on well casing top 202.
The bellend pressure reduction well that the utility model provides, owing to increasing the diameter of bottom dewatering well 102, the water-holding capacity of individual well is increased, thus under the constant prerequisite of Pit Discharge, the quantity of pressure reduction well can be reduced, or reduce the degree of depth of pressure reduction well, save precipitation cost, thus reduce cost and the accelerating construction progress of integrated engineering.
In addition, owing to increasing the diameter of chimney filter 203, single well capacity is increased, thus under the constant prerequisite of Pit Discharge, the quantity of pressure reduction well can be reduced, or reduce the degree of depth of pressure reduction well, save precipitation cost, thus reduce cost and the accelerating construction progress of integrated engineering.
As shown in Figure 1A, in a specific embodiment of the present utility model, bottom dewatering well, the diameter of 102 is all consistent from top to bottom, expands in rule relative to dewatering well top 101.
As shown in Figure 1B, in another specific embodiment of the present utility model, bottom dewatering well, the diameter of 102 is inconsistent from top to bottom, and relative to dewatering well top 101 in irregular expansion, such as, bottom dewatering well, the diameter of 102 expands from top to bottom successively.
Certainly; the form that should be realized that bottom above-mentioned two kinds of dewatering wells is only two concrete examples; the utility model is not as limit; it expands form can also be other forms; as long as the diameter bottom dewatering well is greater than the diameter on dewatering well top, then all at protection domain of the present utility model and so on.
As shown in Figure 4 A, in a specific embodiment of the present utility model, the diameter of chimney filter 203 is all consistent from top to bottom, expands in rule relative to well casing top 202.
As shown in Figure 4 B, in another specific embodiment of the present utility model, the diameter of chimney filter 203 increases from top to bottom gradually, relative to well casing top 202 in trapezoidal expansion.
As shown in Figure 4 C, in another specific embodiment of the present utility model, the diameter of chimney filter 203 first increases from top to bottom and reduces, expands in spindle relative to well casing top 202.
Certainly; should be realized that the form of above-mentioned three kinds of chimney filters is only three concrete examples, the utility model is not as limit, and it expands form can also be other forms; as long as the diameter of chimney filter is greater than the diameter on well casing top, then all at protection domain of the present utility model and so on.
Such as, in the middle of concrete work progress, for the well casing of the dewatering well of the diameter of routine (referring to external diameter herein) 650mm and diameter (referring to external diameter herein) 273mm, the external diameter of chimney filter 203 is 500mm ~ 550mm.By the external diameter of chimney filter 203 is increased to 500mm ~ 550mm by the 273mm of routine, single well capacity increases by more than 1.83 times, that is:
wherein q-single well flow, unit is m
3; r
s-chimney filter radius, unit is mm; L-strainer water entering section bit length, unit is m; K-AQUIFER HYDRAULIC.When l, k are constant, when chimney filter radius increases, water yield increase in direct ratio.
In order to prevent surface waste water from infiltrating in well, well head 201 is higher than earth's surface more than 0.5m, and well head 201 adopts high-quality cohesive soil or cement paste to close, and its degree of depth is not less than 2.00m.
Wherein, the material on well casing top 202 is welded steel pipe, and its thickness is 4mm.Chimney filter 203 is circular hole filter pipe, and filter pipe is coated with two-layer 30 order ~ 40 object nylon leaching nets.The diameter of sediment tube 204 is identical with the diameter of filter pipe, its length is 1.00m, and the end mouth of sediment tube 204 is shut with iron plate, sediment tube 204 is connected on bottom filter pipe, and the effect arranging sediment tube 204 makes filter pipe be unlikely the effect affecting water inlet because of sand setting blocking in well.
Please continue to refer to Fig. 5, the utility model also provides a kind of deep foundation ditch structure, comprises water-stop curtain, ground-connecting-wall and bellend pressure reduction well as shown in Figure 3.Because this deep foundation ditch have employed bellend pressure reduction well, thus increase bottom dewatering well and the diameter of chimney filter, the water-holding capacity of individual well and capacity of outlet water are all increased, thus under the constant prerequisite of Pit Discharge, effectively can reduce the quantity of pressure reduction well, or reduce the degree of depth of pressure reduction well, save precipitation cost, reduce cost and the accelerating construction progress of overall deep-foundation pit engineering, simultaneously, the ground-connecting-wall of deep foundation ditch and the degree of depth of water-stop curtain are also decreased, thus significantly can reduce construction cost.
The construction method of the bellend pressure reduction well that the utility model provides, comprises the following steps:
Below earth's surface, form a dewatering well 100, wherein bottom dewatering well, the diameter of 102 is greater than the diameter on dewatering well top 101, as shown in figure 1 a or figure 1b.Particularly, by bottom dewatering well 102 carry out pile at the bottom of expansion or water under high pressure die-cut, make the diameter of bottom dewatering well 102 be greater than the diameter on dewatering well top 101.
In dewatering well 100, arrange well casing 200, wherein, well casing 200 comprises well head 201, well casing top 202, chimney filter 203 and sediment tube 204 from top to bottom successively, and well head 201 is higher than earth's surface, and the diameter of chimney filter 203 is greater than the diameter on well casing top 202, as shown in Figure 2 A;
Gravel 303 is filled between 102 bottom sediment tube 204, chimney filter 203 and dewatering well; Clay ball 302, cohesive soil 301 is filled successively from bottom to up, as shown in Figure 3 between well casing top 202 and dewatering well top 101.Wherein, clay ball 302 and cohesive soil 301 act as sealing, the acting as filtered water and prevent from blocking chimney filter hole of gravel 303.
The foregoing is only preferred embodiment of the present utility model, not thereby limit the scope of the claims of the present utility model.Obviously, those skilled in the art can carry out various change and modification to utility model and not depart from spirit and scope of the present utility model.Like this, if these amendments of the present utility model and modification belong within the scope of the utility model claim and equivalent technologies thereof, then the utility model is also intended to comprise these change and modification.
Claims (13)
1. a bellend pressure reduction well, is characterized in that, comprising:
The dewatering well being arranged on below earth's surface and the well casing be arranged in described dewatering well;
Described dewatering well comprises bottom dewatering well top and dewatering well;
Described well casing comprises well head, well casing top, chimney filter and sediment tube from top to bottom successively, and described well head is higher than described earth's surface; Fill cohesive soil, clay ball successively from top to bottom between described well casing top and described dewatering well top, between bottom described chimney filter, sediment tube and described dewatering well, fill gravel;
Wherein, the diameter bottom described dewatering well is greater than the diameter on described dewatering well top, and the diameter of described chimney filter is greater than the diameter on described well casing top.
2. bellend pressure reduction well as claimed in claim 1, is characterized in that, the diameter bottom described dewatering well is all consistent from top to bottom, expands in rule relative to described dewatering well top.
3. bellend pressure reduction well as claimed in claim 1, it is characterized in that, the diameter bottom described dewatering well is inconsistent from top to bottom, is irregular expansion relative to described dewatering well top.
4. the bellend pressure reduction well as described in claim 1 or 2 or 3, is characterized in that, the diameter of described chimney filter is all consistent from top to bottom, expands in rule relative to described well casing top.
5. the bellend pressure reduction well as described in claim 1 or 2 or 3, it is characterized in that, the diameter of described chimney filter increases from top to bottom gradually, is trapezoidal expansion relative to described well casing top.
6. the bellend pressure reduction well as described in claim 1 or 2 or 3, is characterized in that, the diameter of described chimney filter first increases from top to bottom and reduces, is that spindle expands relative to described well casing top.
7. bellend pressure reduction well as claimed in claim 1, it is characterized in that, the diameter on described dewatering well top is 650mm.
8. bellend pressure reduction well as claimed in claim 7, it is characterized in that, the external diameter on described well casing top is 273mm, and the external diameter of described chimney filter is 500mm ~ 550mm.
9. bellend pressure reduction well as claimed in claim 1, it is characterized in that, described well head is higher than described earth's surface more than 0.5m.
10. bellend pressure reduction well as claimed in claim 1, it is characterized in that, the material on described well casing top is welded steel pipe, and its thickness is 4mm.
11. bellend pressure reduction wells as claimed in claim 1, it is characterized in that, described chimney filter is circular hole filter pipe, and filter pipe is coated with two-layer 30 order ~ 40 object nylon leaching nets.
12. bellend pressure reduction wells as claimed in claim 11, it is characterized in that, the diameter of described sediment tube is identical with the diameter of described filter pipe, and its length is 1.00m, and the end mouth of described sediment tube is shut with iron plate.
13. 1 kinds of deep foundation ditch structures, is characterized in that, comprise the bellend pressure reduction well as described in any one of claim 1 to 12.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520488180.2U CN204940314U (en) | 2015-07-08 | 2015-07-08 | A kind of bellend pressure reduction well and deep foundation ditch structure thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520488180.2U CN204940314U (en) | 2015-07-08 | 2015-07-08 | A kind of bellend pressure reduction well and deep foundation ditch structure thereof |
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|---|---|
| CN204940314U true CN204940314U (en) | 2016-01-06 |
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| CN201520488180.2U Withdrawn - After Issue CN204940314U (en) | 2015-07-08 | 2015-07-08 | A kind of bellend pressure reduction well and deep foundation ditch structure thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104975610A (en) * | 2015-07-08 | 2015-10-14 | 上海建工二建集团有限公司 | Expanded-end decompression well, deep foundation pit structure and construction method for expanded-end decompression well |
| CN109024640A (en) * | 2018-08-10 | 2018-12-18 | 中建局集团建设发展有限公司 | One kind closing water valve device, shut-in well structure and its construction method |
| CN109972643A (en) * | 2019-05-06 | 2019-07-05 | 中国人民解放军空军工程大学 | A kind of region of FuShui base pit engineering Trinity joint precipitation system |
-
2015
- 2015-07-08 CN CN201520488180.2U patent/CN204940314U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104975610A (en) * | 2015-07-08 | 2015-10-14 | 上海建工二建集团有限公司 | Expanded-end decompression well, deep foundation pit structure and construction method for expanded-end decompression well |
| CN104975610B (en) * | 2015-07-08 | 2017-05-10 | 上海建工二建集团有限公司 | Expanded-end decompression well, deep foundation pit structure and construction method for expanded-end decompression well |
| CN109024640A (en) * | 2018-08-10 | 2018-12-18 | 中建局集团建设发展有限公司 | One kind closing water valve device, shut-in well structure and its construction method |
| CN109972643A (en) * | 2019-05-06 | 2019-07-05 | 中国人民解放军空军工程大学 | A kind of region of FuShui base pit engineering Trinity joint precipitation system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20160106 Effective date of abandoning: 20170510 |