CN204171078U - Planar for contaminated water and soil integration in-situ immobilization closes well-points dewatering structure - Google Patents
Planar for contaminated water and soil integration in-situ immobilization closes well-points dewatering structure Download PDFInfo
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- CN204171078U CN204171078U CN201420641922.6U CN201420641922U CN204171078U CN 204171078 U CN204171078 U CN 204171078U CN 201420641922 U CN201420641922 U CN 201420641922U CN 204171078 U CN204171078 U CN 204171078U
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Abstract
The utility model discloses a kind of planar for contaminated water and soil integration in-situ immobilization and close well-points dewatering structure, for the contaminated area of planar, it is characterized in that described Precipitation Structure comprises medicament Injection Well and some well-point pipes, some described well-point pipes are around described contaminated area peripheral disposition and in closed circular region, described medicament Injection Well is positioned at described closed circular region central point.The utility model has the advantages that, the well-points dewatering system architecture of arranging in closed circular is simple, cost is lower, underground water can be impelled to move, concentrate and extract, be convenient to medicament with water directional migration and cover whole restoring area, do not stay dead angle, remediation efficiency is higher, simultaneously can also drainage preconsolidation ground, and do not destroy soil structures, achieve the reparation of the following water and soil integration of level of ground water.
Description
Technical field
The utility model belongs to underground water, remediation contaminated soil technical field, is specifically related to a kind of planar for contaminated water and soil integration in-situ immobilization and closes well-points dewatering structure.
Background technology
With China's rapid economic development, all kinds of soil and groundwater environmental pollution accidents that industrial and agricultural production and construction activity cause take place frequently, and cause serious economic loss and negative social effect, jeopardize people's property and life security.Row, residues of pesticides, Simple Landfill Site Leachate site seepage etc. are stolen in the evaporating, emitting, dripping or leaking of liquid or gas of poisonous and harmful substance in industrial production, sewage, are the main causes causing water and soil pollution.Therefore, along with the fast development of urban construction, the control of underground water and soil pollution and the demand of reparation are just growing.
There is due to underground water pollution the features such as regionality, disguise, difficult Reversibility, hysteresis quality, identify and repair difficulty very big, therefore the pollution of soil is only paid close attention in the domestic current improvement for contaminated site mostly, ignore or avoid underground water pollution problem, cause some places after soil remediation a period of time, polluter again collects under groundwater effect, and the effect that Polluted Soil is administered is had a greatly reduced quality.Therefore, from the angle of chronicity, continuation, solve contaminated sites problem, need the strategy taking to pollute water and soil combined governance.
Underground water and soil restoring technology comprise physical method, chemical method, biological method and complex method.Groundwater occurrence is in soil aperture, and two-way interaction is indivisible, but at present the soil and groundwater of contaminated site is generally taked to the measure disposed respectively, the integrated restorative procedure of rare effective water and soil integration.Conventional groundwater remediation technology comprises extracts dystopy process recovery technique, original position gas injection-soil vapor extraction technology (AS-SVE), in-situ chemical and bioremediation technology etc. out, and soil restoring technology comprises curing/stabilizing, gas phase extracting, elution technique and thermal desorption etc.
Pump-and-treat system recovery technique is traditional underground water pollution control method, and application is comparatively extensive, but its to there is operating cost high, administer length consuming time and the shortcomings such as DeGrain; Curing/stabilizing is a kind of quick, economic Polluted Soil treatment technology, but its firming body long-time stability are poor, and medicament stirring construction is larger to the disturbance of the original state soil body; The chemistry of original position, bioremediation technology have the advantages such as removal efficiency is high, repair coverage is wide, but are still not clear due to the Transport And Transformation of pollutant in aquifer and degradation rule research, often cause repairing thoroughly or pollution rebound.In a word, current water and soil recovery technique ubiquity cost is high, long in time limit, effect is difficult to the deficiencies such as guarantee.
Summary of the invention
The purpose of this utility model is according to above-mentioned the deficiencies in the prior art part, a kind of planar for contaminated water and soil integration in-situ immobilization is provided to close well-points dewatering structure, this Precipitation Structure is by arranging medicament Injection Well and well-point pipe, utilize medicament Injection Well to inject in pollution water and soil and repair medicament, and drawn water by well-point pipe, make reparation medicament with water directional migration and cover whole contaminated area, realizing the integrated in-situ immobilization of contaminated water and soil.
The utility model object realizes being completed by following technical scheme:
A kind of planar for contaminated water and soil integration in-situ immobilization closes well-points dewatering structure, for the contaminated area of planar, it is characterized in that described Precipitation Structure comprises medicament Injection Well and some well-point pipes, some described well-point pipes are around described contaminated area peripheral disposition and in closed circular region, described medicament Injection Well is positioned at described closed circular region central point.
Described planar contaminated area refers to circle, fan-shaped, square, oval, point-like is uniform or the contaminated area of spot block distribution.
Described Precipitation Structure also comprises the water seal curtain being positioned at described well-point pipe periphery.
Each described well-point pipe is connected with pumping system through water header.
The wall of described medicament Injection Well is provided with medicament ascending pipe.
More than the degree of depth 0.2 ~ 0.3m is repaired in the design that described medicament Injection Well well depth is positioned at described contaminated area.
Distance between described well-point pipe and described medicament Injection Well is not more than
, wherein, S is described well-point pipe design drawdown; H
0for aquifer floor elevation is to the distance of level of ground water; K is described contaminated area soil layer infiltration coefficient.
Described well-point pipe length is
, wherein, D is the design reparation degree of depth; H is described well-point pipe top distance overhead; S
wfor the difference of the degree of depth is repaired in described contaminated area center water level and design; r
0for the array pitch between described well-point pipe.
The utility model has the advantages that, the well-points dewatering system architecture of arranging in closed circular is simple, cost is lower, underground water can be impelled to move, concentrate and extract, be convenient to medicament with water directional migration and cover whole restoring area, do not stay dead angle, remediation efficiency is higher, simultaneously can also drainage preconsolidation ground, and do not destroy soil structures, achieve the reparation of the following water and soil integration of level of ground water.
Accompanying drawing explanation
Fig. 1 is the ring-type well-points dewatering structural facades figure in the utility model with closed water seal curtain;
Fig. 2 is ring-type well-points dewatering structural plan layout drawing in the utility model;
Fig. 3 is the ring-type well-points dewatering structural facades figure in the utility model without water seal curtain;
Fig. 4 is the ring-type well-points dewatering structural facades figure in the utility model with semi-enclosed water seal curtain;
Fig. 5 is ring-type well-points dewatering structural plan, local layout drawing in the utility model;
Fig. 6 is the ring-type well-points dewatering structural plan layout drawing for patch shape contaminated area in the utility model.
Detailed description of the invention
Feature of the present utility model and other correlated characteristic are described in further detail by embodiment below in conjunction with accompanying drawing, so that the understanding of technical staff of the same trade:
Be respectively as marked 1-9 in Fig. 1-6, figure: water seal curtain 1, well-point pipe 2, medicament Injection Well 3, medicament ascending pipe 4, medium coarse sand 5, chimney filter 6, pumping system 7, contaminated area 8, water header 9.
Embodiment one: as shown in Figure 1, 2, the present embodiment is specifically related to a kind of planar for contaminated water and soil integration in-situ immobilization and closes well-points dewatering structure, be applicable to the contaminated area 8 of circle or sub-circular, this Precipitation Structure comprises some well-point pipes 2, medicament Injection Well 3 and water seal curtain 1.
As shown in Figure 1, 2, well-point pipe 2 is positioned at the periphery of circular contaminated area 8, each well-point pipe 2 is arranged around the vertical interval of contaminated area 8, forms the well-point system in closed circular region, can all be applied in contaminated area 8 to make each well-point pipe 2 in well-point system; The buried depth of well-point pipe 2 is positioned at water-bearing layer, is chimney filter 6, for permeable bottom it; Aforesaid well-point system also comprises water header 9 and pumping system 7, and each well-point pipe 2 is connected with the pumping system 7 being positioned at ground through water header 9, and pumping system 7 comprises suction pump and vavuum pump; When the ring overall length that water header in well-point system 9 is formed is more than 100m, two cover pumping systems 7 must be laid, certainly according to the size of contaminated area 8, multiple stage pumping system 7 can be selected, wherein, well-point pipe 2 and chimney filter 6 all adopt the steel pipe manufacturing of 48mm internal diameter, and water header 9 adopts internal diameter to be the steel pipe manufacturing of 100mm, water header 9 adopts ring flange to add the structure of rubber washer when being connected with pumping system 7 and well-point pipe 2, in case leak-stopping gas leaks.
As shown in Figure 1, 2, medicament Injection Well 3 is positioned at the central point in the aforementioned closed circular region be made up of some well-point pipes 2, built-in medicament ascending pipe 4 in medicament Injection Well 3, clean medium coarse sand 5 is loaded between the Guan Zhouyu borehole wall, the well depth of medicament Injection Well 3 should be design and repairs more than the degree of depth 0.2 ~ 0.3m, in the present embodiment, its well depth is specifically positioned at 0.2m above the design reparation degree of depth, can all cover contaminated water and soil in top-down directional migration process with the reparation medicament making it rear injection, guarantee necessary pressure differential simultaneously.
As shown in Figure 1, 2, water seal curtain 1 is arranged at the peripheral of contaminated area 8 and is that closed circular is for going along with sb. to guard him well-point pipe 2, the water barrier of water seal curtain 1 deeply to water-bearing layer, forms closed going along with sb. to guard him, to cut off the underground water hydraulic connection in processing region between water-bearing layer and external aqueous layer; Wherein, water seal curtain adopts steel sheet pile form, does not cause additional contamination, recyclable after construction.
As shown in Figure 1, 2, construction and the method for work of the ring-type well-points dewatering structure in the present embodiment are as follows:
(1) first determine the scope of place contaminated area 8, according to the contaminated situation in place, set the water seal curtain 1 of the arrangement in closed circular in the periphery of contaminated area 8, the water barrier of water seal curtain 1 deeply to water-bearing layer, to form closed going along with sb. to guard him;
(2) excavate the above Polluted Soil of processing region level of ground water and properly dispose;
(3) in aforesaid closed water seal curtain 1, carry out the burial and construction of well-point system, namely bury vertical well-point pipe 2 underground, to form the well-point system in closed circular outer the making a circle of contaminated area 8; The buried depth of well-point pipe 2 is positioned at water-bearing layer, is chimney filter 6, for permeable bottom it; Afterwards each well-point pipe 2 is linked together by water header 9, and the pumping system 7 being located on ground is connected, composition well-point system;
(4) central point in the aforementioned closed circular region be made up of well-point pipe arranges medicament Injection Well 3, loads clean medium coarse sand 5 between built-in medicament ascending pipe 4, the Guan Zhouyu borehole wall, the well depth of medicament Injection Well 3 is positioned at design and repairs 0.2m above the degree of depth;
(5) in medicament ascending pipe 4, inject reparation liquid medicine, the liquid level repairing medicament is not less than level of ground water, to guarantee enough pressure differentials, makes reparation medicament inject bottom and pollutes water and soil; The pumping system started in well-point system draws water to well-point pipe 2 simultaneously, draw water period, pollute in water and soil because reparation medicament progressively enters and to well-point pipe 2 directional migration, therefore should continue to inject in medicament ascending pipe 4 and repair medicament to keep medicament liquid level stabilizing, make pressure differential constant; When the level of ground water at well-point pipe 2 place is down to precipitation funnel liquid level and liquid level water level stops pumping after a period of stabilisation, funnel liquid level specifically can see shown in Fig. 1; Continue to draw water after water level rezime, so circulation repeatedly again, and till occurring repairing medicament component until drawing water from well-point pipe 2, the water of extraction should properly be disposed;
(6) leave standstill a period of time, reparation medicament is fully reacted with contaminated water and soil, until water level rezime and meet repair medicament reaction time after continue to draw water, repeat above-mentioned standing operation of drawing water, until water and soil sampling detect up to standard after, namely complete reparation.
It should be noted that,
A. in the present embodiment, when place conditions permit and periphery without other pollution sources time, can consider not establish water seal curtain as shown in Figure 3, also can arrange semi-enclosed water seal curtain 1 as shown in Figure 4, namely the buried depth of water seal curtain 1 is arranged in water-bearing layer, instead of in water barrier;
B. in the present embodiment, the distance between medicament Injection Well 3 and well-point pipe 2 is not more than
, namely distance between the two should within the Rainfall Influence radius of well-point pipe 2, and to guarantee that repairing medicament can arrive in well-point pipe 2 smoothly, wherein, S is described well-point pipe design drawdown; H
0for aquifer floor elevation is to the distance of level of ground water; K is described contaminated area soil layer infiltration coefficient; And R is not less than the ultimate range at well-point pipe 2 to water seal curtain 1 or contaminated area 8 edge; The computing formula of well-point pipe design drawdown S is as follows:
, wherein, D is the design reparation degree of depth (m); h
wfor initial groundwater level depth (m); S
wfor the difference (m) of the degree of depth is repaired in center, place water level and design; In well-point system, the computing formula of well-point pipe length L is as follows:
,
hfor top, well point distance (m) overhead;
r 0 for well-point pipe array pitch; All the other symbolic significances are the same;
The total water yield Q of restoring area in well-point system, is calculated as follows:
, Q is restoring area odd-numbered day total water yield (m
3/ d), all the other symbolic significances are the same;
The maximum allowable outflow q of every root well-point pipe 2 in well-point system
max, adopt empirical equation to be calculated as follows:
, the well-point pipe quantity therefore in well-point system is, the actual water yield of every root well-point pipe
,
q < q max , then meet the requirements.
q maxfor the permission max water yield (m of single well-point pipe
3/ d);
r w for the radius (m) of filter pipe;
lfor the length (m) of filter pipe;
kfor the infiltration coefficient (m/d) of drainage layer.
The beneficial effect of the present embodiment is:
1. precipitation drainage preconsolidation ground, and do not destroy soil structures;
2. water impels underground water to move, concentrates and extract, and is convenient to medicament and moves with water transport and be covered to contaminated area;
3. realize the following water and soil integration of level of ground water to repair, Polluted Groundwater credit rating after Precipitation Structure reparation in the present embodiment can be repaired as required, reach site remediation target, reach same reparation target required time and can save the time at least over half compared to the general process repair structure that draws water;
4. Precipitation Structure is simple, easy construction, compared to general process recovery technique of drawing water, and cost-saved more than 50%.
Embodiment two: as shown in Figure 5, the present embodiment is specifically related to a kind of planar for contaminated water and soil integration in-situ immobilization and closes well-points dewatering structure, be applicable to fan-shaped contaminated area 8, this Precipitation Structure comprises medicament Injection Well 3, some well-point pipes 2 and water seal curtain 1; Some well-point pipes 2 lay the well-point pipe 2 forming local annular enclosed (namely fan-shaped) around fan-shaped contaminated area 8, and the central spot in this ring-type closed area, local arranges medicament Injection Well 3, the same water seal curtain 1 in local ring-type of a circle is laid in this this periphery, ring-type closed area, local external.All the other structures in this Precipitation Structure are identical with embodiment one.
In the present embodiment, the Specific construction of Precipitation Structure and method of work are same as described in embodiment one.
Embodiment three: as shown in Figure 6, the present embodiment is specifically related to a kind of planar for contaminated water and soil integration in-situ immobilization and closes well-points dewatering structure, be applicable to some plaquelike contaminated area 8, this Precipitation Structure comprises medicament Injection Well 3, some well-point pipes 2 and water seal curtain 1; Some well-point pipes 2 are arranged around the periphery of each patch shape contaminated area 8, form the well-point system in closed circular; Central spot in the closed circular region be made up of some well-point pipes 2 arranges medicament Injection Well 3, and this this closed circular area periphery external lays a loop water seal curtain 1.All the other structures in this Precipitation Structure are identical with embodiment one.
In the present embodiment, the Specific construction of Precipitation Structure and method of work are same as described in embodiment one.
Claims (8)
1. close well-points dewatering structure for the planar of contaminated water and soil integration in-situ immobilization for one kind, for the contaminated area of planar, it is characterized in that described Precipitation Structure comprises medicament Injection Well and some well-point pipes, some described well-point pipes are around described contaminated area peripheral disposition and in closed circular region, described medicament Injection Well is positioned at described closed circular region central point.
2. a kind of planar for contaminated water and soil integration in-situ immobilization according to claim 1 closes well-points dewatering structure, it is characterized in that the contaminated area of described planar refers to circle, fan-shaped, square, oval, point-like is uniform or the contaminated area of spot block distribution.
3. a kind of planar for contaminated water and soil integration in-situ immobilization according to claim 1 closes well-points dewatering structure, it is characterized in that described Precipitation Structure also comprises the water seal curtain being positioned at described well-point pipe periphery.
4. a kind of planar for contaminated water and soil integration in-situ immobilization according to claim 1 closes well-points dewatering structure, it is characterized in that each described well-point pipe is connected with pumping system through water header.
5. a kind of planar for contaminated water and soil integration in-situ immobilization according to claim 1 closes well-points dewatering structure, and the wall that it is characterized in that described medicament Injection Well is provided with medicament ascending pipe.
6. a kind of planar for contaminated water and soil integration in-situ immobilization according to claim 1 closes well-points dewatering structure, it is characterized in that described medicament Injection Well well depth is positioned at more than the design reparation degree of depth of described contaminated area 0.2 ~ 0.3m.
7. a kind of planar for contaminated water and soil integration in-situ immobilization according to claim 1 closes well-points dewatering structure, it is characterized in that the distance between described well-point pipe and described medicament Injection Well is not more than
, wherein, S is described well-point pipe design drawdown; H
0for aquifer floor elevation is to the distance of level of ground water; K is described contaminated area soil layer infiltration coefficient.
8. a kind of planar for contaminated water and soil integration in-situ immobilization according to claim 1 closes well-points dewatering structure, it is characterized in that described well-point pipe length is
, wherein, D is the design reparation degree of depth; H is described well-point pipe top distance overhead; S
wfor the difference of the degree of depth is repaired in described contaminated area center water level and design; r
0for the array pitch between described well-point pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420641922.6U CN204171078U (en) | 2014-10-31 | 2014-10-31 | Planar for contaminated water and soil integration in-situ immobilization closes well-points dewatering structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420641922.6U CN204171078U (en) | 2014-10-31 | 2014-10-31 | Planar for contaminated water and soil integration in-situ immobilization closes well-points dewatering structure |
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| CN204171078U true CN204171078U (en) | 2015-02-25 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104353665A (en) * | 2014-10-31 | 2015-02-18 | 上海岩土工程勘察设计研究院有限公司 | Facet sealed well-point dewatering structure for integrated in-situ polluted water-soil remediation |
-
2014
- 2014-10-31 CN CN201420641922.6U patent/CN204171078U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104353665A (en) * | 2014-10-31 | 2015-02-18 | 上海岩土工程勘察设计研究院有限公司 | Facet sealed well-point dewatering structure for integrated in-situ polluted water-soil remediation |
| CN104353665B (en) * | 2014-10-31 | 2017-06-30 | 上海岩土工程勘察设计研究院有限公司 | Planar for contaminated water and soil integration in-situ immobilization closes well-points dewatering structure |
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Granted publication date: 20150225 Effective date of abandoning: 20170630 |
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