CN204098050U - A kind of control artesian water precipitation system - Google Patents
A kind of control artesian water precipitation system Download PDFInfo
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- CN204098050U CN204098050U CN201420544728.6U CN201420544728U CN204098050U CN 204098050 U CN204098050 U CN 204098050U CN 201420544728 U CN201420544728 U CN 201420544728U CN 204098050 U CN204098050 U CN 204098050U
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Abstract
The utility model provides a kind of and controls artesian water precipitation system, the deep-well pipe well comprising the shallow well vacuum tube well in the suspension type water-stop curtain penetrating flour sand folder silty clay, aquitard filter pipe being arranged on flour sand folder silty clay and be arranged on by filter pipe in the following highly permeable layer of flour sand folder silty clay, described shallow well vacuum tube well and deep-well pipe well are arranged in suspension type water-stop curtain institute region.The utility model takes into full account the feature of Different Strata, as required precipitation, reduces the impact on foundation ditch surrounding enviroment, saves cost, reduces quicksand, stream soil, prominent possibility of gushing, increases deep pit monitor.
Description
Technical field
The utility model relates to ultra-deep foundation pit excavation artesian water Control Engineering, and particularly one controls artesian water precipitation system.
Background technology
In recent years, along with the Fast Construction in city, urban land day is becoming tight, impel urban architecture constantly on the ground and underground develop, started the underground space development upsurge of a new round, cause deep excavation project towards more greatly, more deeply, more difficult future development.Wherein, in Excavation Process, how artesian water controls to be difficult point, should ensure not dash forward gush, safety of surrounding environment, groundwater abstraction as far as possible few again.If artesian water is controlled preferably, often cause catastrophic consequence.
The stratum on I level terrace, the Changjiang river is that lake is long-pending, alluviation, diluvium facies deposit, generally there is typical up-thin-low-thick diadactic structure.Lake wetlands band upper formation be several meters ~ tens meters mucky soil, saturated softly to mould, plastic silty clay, clay; Middle part is flour sand folder silty clay, thick several meters ~ ten meters; Bottom is fine sand; Bottom is thick medium sand, sand gravel or boulder bed.
I level terrace is according to can be divided into leading edge segments, interlude, trailing edge section three different locations from the Changjiang river distance, and three different location clay distribution structures have certain Changing Pattern.Deposit silt, silty sand ground near the leading edge segments upper strata in the Changjiang river, it is lower is clay layer, and flour sand folder silty clay below clay layer is very thin.
Interlude superficial part large area is distributed with muddy soft soil layer, the flour sand folder silty clay progressive additive of bottom.Trailing edge section superficial part away from the Changjiang river still has muddy soft soil in blocks distribution, and the most obvious feature is that the flour sand folder silty clay of bottom is very thick, general 7 ~ 15 meters thick, have until basement rock is all alternation of bed.
The Changjiang river I level stage soil layer construction is different, causes the type of underground water also different.Common groundwater type has: perched water, diving, artesian water.
Wherein artesian water is mainly composed in silt, flour sand, Extra-fine sand, coarse sand and the boulder bed be stored between top cohesive soil and basement rock, tight with the Changjiang river hydraulic connections.Wherein artesian water can be subdivided into two classes according to clay distribution: a class is flour sand folder silty clay aquitard, and a class is the highly permeable layer in flour sand, Extra-fine sand, boulder bed.The Changjiang river I level terrace interlude and away from the Changjiang river edge section, flour sand folder silty clay is thicker, and transmission coefficient is less, is generally 10
-5~ 10
-4cm/s, and horizontal-hole blasting is far longer than vertical permeability coefficient, has certain hydraulic connections with the Changjiang river, is weak confined aquifer.Flour sand, Extra-fine sand, boulder bed between bottom to basement rock, transmission coefficient is comparatively large, is generally 10
-3~ 10
-2cm/s, tight with the Changjiang river hydraulic connections, be strong confined aquifer.
It is very big that I level terrace, the Changjiang river artesian water controls difficulty, along with foundation ditch to more greatly, darker, the more complicated development of surrounding enviroment, artesian water controls the success or failure that success or failure are directly connected to foundation ditch.For interlude with away from the edge section in the Changjiang river, the feature that flour sand folder silty clay is thicker, to the deep-foundation pit engineering that also there is thicker flour sand folder silty clay bottom foundation ditch, conventional method adopts the underground water that deep-well tube well dewatering is difficult in white-out alternating layers; Due to features such as the flour sand folder anisotropy of silty clay, pressure-bearing property, the water yield are large, the simple underground water adopting light well point to be also difficult in this layer of white-out.
Summary of the invention
The advantages such as problem to be solved in the utility model is to provide and a kind of controls artesian water precipitation system, and this system has safe and reliable, cost economic, minimizing is drawn water.
For realizing above-mentioned technical purpose, the utility model by the following technical solutions:
A kind of control artesian water precipitation system, comprise the suspension type water-stop curtain penetrating flour sand folder silty clay aquitard, deep-well pipe well filter pipe being arranged on the shallow well vacuum tube well in flour sand folder silty clay aquitard and being arranged on by filter pipe in the following highly permeable layer of flour sand folder silty clay aquitard, described shallow well vacuum tube well and deep-well pipe well are arranged in suspension type water-stop curtain institute region.
Described suspension type water-stop curtain is all round closure and the water-stop curtain do not closed of bottom.
The submersible pump one that pump amount is 10 ~ 30m3/h is provided with in above-mentioned shallow well vacuum tube well; The submersible pump two that pump amount is 50 ~ 80m3/h is provided with in deep-well pipe well.
Above-mentioned shallow well vacuum tube well is followed successively by real pipe, filter pipe and sediment tube from top to bottom, and be arranged on by filter pipe in flour sand folder silty clay aquitard, submersible pump one is positioned at filter pipe, and vacuum pump is positioned at shallow well vacuum tube well filter pipe.
Above-mentioned deep-well pipe well is followed successively by real pipe, filter pipe and sediment tube from top to bottom, and be arranged on by filter pipe in the following highly permeable layer of flour sand folder silty clay aquitard, submersible pump two is positioned at deep-well pipe well filter pipe.
The utility model has the following advantages:
1. reduce quicksand, stream soil, prominent possibility of gushing, increase deep pit monitor
The transmission coefficient of flour sand folder silty clay is about 10
-5~ 10
-4cm/s, is the artesian aquifer of weak water permeability, is called aquitard, have weak pressure-bearing property; The transmission coefficient of bottom layer of sand, boulder bed is about 10
-3~ 10
-2cm/s, is the artesian aquifer of highly permeable, is called highly permeable layer, have strong pressure-bearing property.People often take much count of the control of artesian water in highly permeable layer, and easily ignore the control of underground water in aquitard.In Practical Project, often cause the engineering phenomenons such as stream soil, quicksand, local eminence because not controlling underground water in aquitard well, cause cheating outer surface settlement excessive, comparatively greatly, on the impact of damaging property of surrounding enviroment, its lesson is painful to Supporting Structure deformation.Adopt the utility model to control underground water, water-stop curtain is through flour sand folder silty clay, and artesian water head is reduced to below flour sand folder silty clay by deep-well pipe well, weak artesian water in shallow well vacuum tube well drainage flour sand folder silty clay.Weak artesian water in flour sand of controlling well folder silty clay, can greatly reduce the unfavorable phenomenons such as stream soil, quicksand, local eminence, improve the safety of foundation ditch.
2. lack groundwater abstraction at such soil layer excavation pit relatively as much as possible, more conventional groundwater control method adopts suspension type water-stop curtain in conjunction with deep-well tube well dewatering, because bottom highly permeable layer transmission coefficient is large, supply is fast, tight with the Changjiang river hydraulic connections, not occurring to dash forward to emerge in large numbers to resemble for meeting foundation ditch, reducing artesian water water level, and needing underground water in a large amount of extraction highly permeable layer.
The utility model is adopted to control artesian water, flour sand folder silty clay permeability is relatively little, vertical permeability is less than horizontal permeability, shallow well vacuum tube well utilizes negative pressure can press from both sides underground water in silty clay by drainage flour sand smoothly, and flour sand presss from both sides silty clay and the Changjiang river hydraulic connection is relatively weak, supply is comparatively slow, therefore just can reduce weak artesian water head in flour sand folder silty clay without the need to a large amount of groundwater abstraction, meet the needs of the excavation of foundation pit scope of operation.
3. reduce the impact on surrounding enviroment
Conventional employing suspension type water-stop curtain needs a large amount of long-time groundwater abstraction in conjunction with deep-well tube well dewatering method, large on surrounding enviroment impact, and the scope of impact is wide.And adopt the utility model to control underground water, water extract is few, and flour sand folder silty clay adopts water-stop curtain to cut off and external force contacts, and the shallow well vacuum tube well filter pipe pressed from both sides by being arranged on flour sand in the aquitard of silty clay, utilize the air in vacuum pump extraction well casing, make vacuum in well casing be not less than 65kPa, well casing is inside and outside produces pressure differential, utilizes negative pressure to be pressed from both sides by flour sand after water in silty clay comes together in well casing to adopt the submersible pump of little pump amount to draw water as required; Little on surrounding enviroment impact, the scope of impact is also little.
4. cost economic
Relative to lowering heartn type water-stop curtain+pipe well drainage precipitation, adopt the utility model to control artesian water and there is cost economic, the advantages such as easy construction.
The advantage such as the utility model has safe and reliable, cost economic in sum, minimizing is drawn water.
Accompanying drawing explanation
Fig. 1 is plan view of the present utility model;
Fig. 2 is sectional drawing of the present utility model;
Fig. 3 is the utility model shallow well vacuum tube well structure chart;
Fig. 4 is the utility model deep-well pipe well structure figure.
Wherein: 1-shallow well vacuum tube well, 2-deep-well pipe well, 3-suspension type water-stop curtain, 4-flour sand folder silty clay aquitard, 5-flour sand, Extra-fine sand, boulder bed highly permeable layer, 6-pipe, 7-filter pipe, 8-sediment tube, 9-submersible pump one, 10-vacuum pump, 11-submersible pump two in fact.
Detailed description of the invention
The utility model comprises the suspension type water-stop curtain 3 penetrating flour sand folder silty clay aquitard 4, the shallow well vacuum tube well 1 filter pipe 7 being arranged on the deep-well pipe well 2 in flour sand folder silty clay aquitard less than 4 highly permeable layer 5 and being arranged on by filter pipe 7 in flour sand folder silty clay aquitard 4, described suspension type water-stop curtain 3 is all round closure and the water-stop curtain do not closed of bottom, and described shallow well vacuum tube well 1 and deep-well pipe well 2 are arranged in suspension type water-stop curtain 3 regions.
The submersible pump 1 that pump amount is 10 ~ 30m3/h is provided with in above-mentioned shallow well vacuum tube well 1; The submersible pump 2 11 that pump amount is 50 ~ 80m3/h is provided with in deep-well pipe well 2.
Above-mentioned shallow well vacuum tube well 1 is followed successively by real pipe 6, filter pipe 7 and sediment tube 8 from top to bottom, filter pipe 7 is arranged in flour sand folder silty clay aquitard less than 4 highly permeable layer, submersible pump 1 is positioned at filter pipe 7, and vacuum pump 10 is positioned at the real pipe 6 of shallow well vacuum tube well 1.
Above-mentioned deep-well pipe well 2 is followed successively by real pipe 6, filter pipe 7 and sediment tube 8 from top to bottom, and be arranged on by filter pipe 7 in flour sand folder silty clay aquitard less than 4 highly permeable layer 5, submersible pump 2 11 is positioned at deep-well pipe well 2 filter pipe 7.
As shown in Figure 1: the suspension type water-stop curtain 3 of row's all round closure of constructing outward along the construction of structures underground space, need according to design deep-well pipe well 2 and shallow well vacuum tube well 1 that some is set in curtain.
Fig. 3 is the utility model shallow well vacuum tube well 1 structure chart, shallow well vacuum tube well 1 comprises real pipe 6, filter pipe 7, sediment tube 8, vacuum pump 10 etc., filter pipe 7 requires to be arranged in flour sand folder silty clay aquitard 4, by forming negative pressure to pump drainage air in well casing, flour sand being pressed from both sides weak artesian water in silty clay aquitard 1 and collecting the outside pump drainage of well casing.
Fig. 4 is the utility model deep-well pipe well 2 structure chart, deep-well pipe well 2 comprises real pipe 6, filter pipe 7, sediment tube 8, filter pipe 7 requires to be arranged in the flour sand of flour sand folder silty clay aquitard less than 4, Extra-fine sand, boulder bed highly permeable layer 5, extracts artesian water in highly permeable layer 5.
Claims (5)
1. one kind controls artesian water precipitation system, it is characterized in that: comprise the suspension type water-stop curtain penetrating flour sand folder silty clay aquitard, deep-well pipe well filter pipe being arranged on the shallow well vacuum tube well in flour sand folder silty clay aquitard and being arranged on by filter pipe in the following highly permeable layer of flour sand folder silty clay aquitard, described shallow well vacuum tube well and deep-well pipe well are arranged in suspension type water-stop curtain institute region.
2. control artesian water precipitation system according to claim 1, is characterized in that: described suspension type water-stop curtain is all round closure and the water-stop curtain do not closed of bottom.
3. control artesian water precipitation system according to claim 1 and 2, is characterized in that: be provided with the submersible pump one that vacuum pump and pump amount are 10 ~ 30m3/h in shallow well vacuum tube well; The submersible pump two that pump amount is 50 ~ 80m3/h is provided with in deep-well pipe well.
4. control artesian water precipitation system according to claim 3, it is characterized in that: shallow well vacuum tube well is followed successively by real pipe, filter pipe and sediment tube from top to bottom, filter pipe is arranged in flour sand folder silty clay aquitard, submersible pump one is positioned at filter pipe, and vacuum pump is positioned at the real pipe of shallow well vacuum tube well.
5. control artesian water precipitation system according to claim 3, it is characterized in that: deep-well pipe well is followed successively by real pipe, filter pipe and sediment tube from top to bottom, filter pipe is arranged in the highly permeable layer of below flour sand folder silty clay aquitard, and submersible pump two is positioned at deep-well pipe well filter pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420544728.6U CN204098050U (en) | 2014-09-22 | 2014-09-22 | A kind of control artesian water precipitation system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420544728.6U CN204098050U (en) | 2014-09-22 | 2014-09-22 | A kind of control artesian water precipitation system |
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| CN204098050U true CN204098050U (en) | 2015-01-14 |
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ID=52266493
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|---|---|---|---|
| CN201420544728.6U Active CN204098050U (en) | 2014-09-22 | 2014-09-22 | A kind of control artesian water precipitation system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105155564A (en) * | 2015-08-07 | 2015-12-16 | 中建三局第二建设工程有限责任公司 | Anti-inrushing construction method for weak water-resisting layer of deep foundation pit |
| CN105421498A (en) * | 2015-11-16 | 2016-03-23 | 同济大学 | Foundation pit anti-seepage and settlement control method based on stereoscopic curtain-well group system |
-
2014
- 2014-09-22 CN CN201420544728.6U patent/CN204098050U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105155564A (en) * | 2015-08-07 | 2015-12-16 | 中建三局第二建设工程有限责任公司 | Anti-inrushing construction method for weak water-resisting layer of deep foundation pit |
| CN105421498A (en) * | 2015-11-16 | 2016-03-23 | 同济大学 | Foundation pit anti-seepage and settlement control method based on stereoscopic curtain-well group system |
| CN105421498B (en) * | 2015-11-16 | 2017-06-13 | 同济大学 | A kind of foundation ditch water-impervious and subsidence control method based on three-dimensional curtain gang of wells system |
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|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |