CN204298838U - For long and narrow well-points dewatering structure of contaminated water and soil integration in-situ immobilization - Google Patents
For long and narrow well-points dewatering structure of contaminated water and soil integration in-situ immobilization Download PDFInfo
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- CN204298838U CN204298838U CN201420642006.4U CN201420642006U CN204298838U CN 204298838 U CN204298838 U CN 204298838U CN 201420642006 U CN201420642006 U CN 201420642006U CN 204298838 U CN204298838 U CN 204298838U
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 103
- 239000002689 soil Substances 0.000 title claims abstract description 49
- 230000010354 integration Effects 0.000 title claims abstract description 21
- 238000011065 in-situ storage Methods 0.000 title claims abstract description 19
- 239000003814 drug Substances 0.000 claims abstract description 58
- 238000002347 injection Methods 0.000 claims abstract description 32
- 239000007924 injection Substances 0.000 claims abstract description 32
- 239000003673 groundwater Substances 0.000 claims abstract description 16
- 238000001556 precipitation Methods 0.000 claims abstract description 14
- 238000013461 design Methods 0.000 claims description 15
- 238000005086 pumping Methods 0.000 claims description 13
- 230000001174 ascending effect Effects 0.000 claims description 7
- 230000008595 infiltration Effects 0.000 claims description 4
- 238000001764 infiltration Methods 0.000 claims description 4
- 238000005067 remediation Methods 0.000 abstract description 6
- 230000007646 directional migration Effects 0.000 abstract description 5
- 239000000284 extract Substances 0.000 abstract description 4
- 239000012141 concentrate Substances 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 12
- 230000008439 repair process Effects 0.000 description 10
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- 238000005516 engineering process Methods 0.000 description 7
- 239000007788 liquid Substances 0.000 description 7
- 238000003911 water pollution Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000011084 recovery Methods 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 230000004888 barrier function Effects 0.000 description 3
- 239000004576 sand Substances 0.000 description 3
- 230000000087 stabilizing effect Effects 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 230000000875 corresponding effect Effects 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 230000008570 general process Effects 0.000 description 2
- 238000009776 industrial production Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
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- 238000003900 soil pollution Methods 0.000 description 2
- 238000012271 agricultural production Methods 0.000 description 1
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- 230000015556 catabolic process Effects 0.000 description 1
- 231100000749 chronicity Toxicity 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 230000002596 correlated effect Effects 0.000 description 1
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- 238000010828 elution Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
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- 230000003993 interaction Effects 0.000 description 1
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- Processing Of Solid Wastes (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The utility model discloses a kind of long and narrow well-points dewatering structure for contaminated water and soil integration in-situ immobilization, for having the contaminated area of the long and narrow planar of one fixed width, it is characterized in that described Precipitation Structure comprises medicament Injection Well and some well-point pipes, some described well-point pipes close contaminated area described in envelope, described contaminated area has at least one and close by described well-point pipe the closed envelope region that envelope forms, be positioned at described closed envelope region and there is medicament Injection Well described at least one.The utility model has the advantages that, rectangular closed well-points dewatering system architecture 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 long and narrow well-points dewatering structure for contaminated water and soil integration in-situ immobilization.
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 long and narrow well-points dewatering structure for contaminated water and soil integration in-situ immobilization is provided, this Precipitation Structure is by arranging medicament Injection Well and well-point pipe, injected in pollution water and soil by medicament Injection Well 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 long and narrow well-points dewatering structure for contaminated water and soil integration in-situ immobilization, for having the contaminated area of the long and narrow planar of one fixed width, it is characterized in that described Precipitation Structure comprises medicament Injection Well and some well-point pipes, some described well-point pipes close contaminated area described in envelope, described contaminated area has at least one and close by described well-point pipe the closed envelope region that envelope forms, be positioned at described closed envelope region and there is medicament Injection Well described at least one.
Rectangular or the approximate rectangular shape in described closed envelope region.
The wall of described medicament Injection Well is built-in with medicament ascending pipe.
The described contaminated area with the long and narrow planar of one fixed width refers to the planar contaminated area that length-width ratio is not more than 5:1.
Described Precipitation Structure also comprises the water seal curtain being positioned at described well-point pipe periphery.
Described contaminated area has two and close by described well-point pipe the closed envelope region that envelope forms, be positioned at each described closed envelope region and there is medicament Injection Well described at least one.
Each described well-point pipe is connected with pumping system through water header.
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, rectangular closed well-points dewatering system architecture 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 well-points dewatering structural facades figure in the utility model with closed water seal curtain;
Fig. 2 is well-points dewatering structural plan layout drawing in the utility model;
Fig. 3 is well-points dewatering structural plan layout drawing when repairing width G reatT.GreaT.GT 40m in the utility model;
Fig. 4 is the well-points dewatering structural facades figure in the utility model without water seal curtain;
Fig. 5 is the well-points dewatering structural facades figure in the utility model with semi-enclosed water seal curtain.
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 1-10 in Fig. 1-4, 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, valve 10.
Embodiment one: as shown in Figure 1, 2, the present embodiment is specifically related to a kind of long and narrow well-points dewatering structure for contaminated water and soil integration in-situ immobilization, be applicable to the long and narrow planar contaminated area 8 that length-width ratio is not more than 5:1, it should be noted that, planar in the present embodiment is not limited to the square region of standard, also can be irregularly be similar to square region, 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 in planar contaminated area 8, between each well-point pipe 2, interval is arranged, form the well-point system closing the whole contaminated area 8 of envelope, to make each well-point pipe 2 in well-point system can all be applied in contaminated area 8, enclose the rectangular or approximate rectangular shape in the closed envelope region formed by 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, valve 10 and pumping system 7, each well-point pipe 2 is connected with the pumping system 7 being positioned at ground through water header 9, pumping system 7 comprises suction pump and vavuum pump, the water header 9 on pumping system 7 opposite is mounted with valve 10, divide in inflow pump system 7 to make current in water header 9, avoid turbulent flow, 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, 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, the present embodiment Chinese medicine Injection Well 3 has two mouthfuls altogether, is positioned at contaminated area 8, is also namely closed in the closed envelope region that envelope forms by well-point pipe 2, and distributes along contaminated area 8 length direction; 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; It should be noted that, according to the size of contaminated area 8, can arrange the medicament Injection Well 3 of varying number, the hole diameter of each medicament Injection Well 3 depends on the medicament volume of individual well (namely total bolus volume is divided by the quantity of well); Medicament always should be not less than the total water yield for all well-point pipes in medicine region 2 for dose.
As shown in Figure 1, 2, water seal curtain 1 is arranged at the periphery of contaminated area 8 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 closed 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 water seal curtain 1 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 outer the making a circle of contaminated area 8, each well-point pipe 2 interval is laid with the well-point system forming the whole contaminated area 8 of closed envelope; 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; In addition, the water header 9 on pumping system 7 opposite arranges valve 10;
(4) in the aforementioned closed envelope region be made up of well-point system, namely in contaminated area 8, the medicament Injection Well 3 of two opening's edge contaminated area 8 length direction arrangements is set, built-in medicament ascending pipe 4, load clean medium coarse sand 5 between 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 repeatedly, till occurring repairing medicament component until drawing water from well-point pipe 2, the water of extraction should properly be disposed again;
(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 4, also can arrange semi-enclosed water seal curtain 1 as shown in Figure 5, 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, several well-point pipes 2 that each medicament Injection Well 3 all has it corresponding, the distance between medicament Injection Well 3 well-point pipe 2 is corresponding thereto 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 1,3, the present embodiment is specifically related to a kind of long and narrow well-points dewatering structure for contaminated water and soil integration in-situ immobilization, be applicable to length-width ratio and be not more than the long and narrow planar contaminated area 8 of 5:1 and the width G reatT.GreaT.GT 40m of this contaminated area 8, long and narrow planar in the present embodiment is not limited to the square region of standard, also can be irregularly be similar to square region, this Precipitation Structure comprises some well-point pipes 2, medicament Injection Well 3 and water seal curtain 1.
As shown in Figure 1,3, contaminated area 8 has altogether two and close by some well-point pipes 2 the closed envelope region that envelope forms, in all regions of contaminated area 8 are closed in by two closed envelope regions, the shape that each closed envelope region is rectangular or approximate rectangular.In each closed envelope region, be respectively arranged with a medicament Injection Well 3, to guarantee that pollution water and soil in each closed envelope region all within the synergy scope of medicament Injection Well 3 and well-point pipe 2, can not stay and repair dead angle.In the present embodiment, the remainder of Precipitation Structure is same as the Precipitation Structure in embodiment one.
It should be noted that, according to the size of contaminated area, several can be set in contaminated area and close by well-point pipe the closed envelope region that envelope forms, and guarantee all at least to be provided with a medicament Injection Well in each closed envelope region.
Claims (9)
1. a long and narrow well-points dewatering structure for contaminated water and soil integration in-situ immobilization, for having the contaminated area of the long and narrow planar of one fixed width, it is characterized in that described Precipitation Structure comprises medicament Injection Well and some well-point pipes, some described well-point pipes close contaminated area described in envelope, described contaminated area has at least one and close by described well-point pipe the closed envelope region that envelope forms, be positioned at described closed envelope region and there is medicament Injection Well described at least one, the described contaminated area with the long and narrow planar of one fixed width refers to the planar contaminated area that length-width ratio is not more than 5:1.
2. a kind of long and narrow well-points dewatering structure for contaminated water and soil integration in-situ immobilization according to claim 1, is characterized in that the described rectangular shape in closed envelope region.
3. a kind of long and narrow well-points dewatering structure for contaminated water and soil integration in-situ immobilization according to claim 1, the wall that it is characterized in that described medicament Injection Well is built-in with medicament ascending pipe.
4. a kind of long and narrow well-points dewatering structure for contaminated water and soil integration in-situ immobilization according to claim 1, is characterized in that described Precipitation Structure also comprises the water seal curtain being positioned at described well-point pipe periphery.
5. a kind of long and narrow well-points dewatering structure for contaminated water and soil integration in-situ immobilization according to claim 1, it is characterized in that described contaminated area has two and close by described well-point pipe the closed envelope region that envelope forms, be positioned at each described closed envelope region and there is medicament Injection Well described at least one.
6. a kind of long and narrow well-points dewatering structure for contaminated water and soil integration in-situ immobilization according to claim 1 or 5, is characterized in that each described well-point pipe is connected with pumping system through water header.
7. a kind of long and narrow well-points dewatering structure for contaminated water and soil integration in-situ immobilization according to claim 1, 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.
8. a kind of long and narrow well-points dewatering structure for contaminated water and soil integration in-situ immobilization according to claim 1, 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.
9. a kind of long and narrow well-points dewatering structure for contaminated water and soil integration in-situ immobilization according to claim 1, 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.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104358269A (en) * | 2014-10-31 | 2015-02-18 | 上海岩土工程勘察设计研究院有限公司 | Long/narrow surface well-point dewatering structure for integral polluted water/soil in-situ remediation |
| CN105839655A (en) * | 2016-05-12 | 2016-08-10 | 同济大学 | Foundation pit dewatering and contaminated site remediation coupled foundation pit dewatering cleaning system |
| CN115619979A (en) * | 2022-11-22 | 2023-01-17 | 广州中望龙腾软件股份有限公司 | Semi-elongated surface cleaning method, terminal, and storage medium |
-
2014
- 2014-10-31 CN CN201420642006.4U patent/CN204298838U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104358269A (en) * | 2014-10-31 | 2015-02-18 | 上海岩土工程勘察设计研究院有限公司 | Long/narrow surface well-point dewatering structure for integral polluted water/soil in-situ remediation |
| CN105839655A (en) * | 2016-05-12 | 2016-08-10 | 同济大学 | Foundation pit dewatering and contaminated site remediation coupled foundation pit dewatering cleaning system |
| CN105839655B (en) * | 2016-05-12 | 2017-12-26 | 同济大学 | The cleaning base pit dewatering system that a kind of base pit dewatering couples with contaminated site regulation |
| CN115619979A (en) * | 2022-11-22 | 2023-01-17 | 广州中望龙腾软件股份有限公司 | Semi-elongated surface cleaning method, terminal, and storage medium |
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