CN105080951A - Novel interlayer well casings used for soil aeration, interlayer aeration well and construction method of interlayer aeration well - Google Patents
Novel interlayer well casings used for soil aeration, interlayer aeration well and construction method of interlayer aeration well Download PDFInfo
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- CN105080951A CN105080951A CN201510510947.1A CN201510510947A CN105080951A CN 105080951 A CN105080951 A CN 105080951A CN 201510510947 A CN201510510947 A CN 201510510947A CN 105080951 A CN105080951 A CN 105080951A
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Abstract
The embodiment of the invention provides novel interlayer well casings used for soil aeration, an interlayer aeration well and a construction method of the interlayer aeration well. Each interlayer well casing comprises a pipeline. A plurality of screening holes are distributed in the wall of each pipeline at intervals, and the hole diameters of the screening holes are gradually increased from the top end to the bottom end of each pipeline. An annular baffle is fixed to the wall of the pipeline. The interlayer aeration well comprises a plurality of interlayer well casings; the ends of all the interlayer well casings are detachably connected in sequence and communicated to form the well casing; and the diameters of the screening holes of each novel interlayer well casing used for soil aeration and located on the lower portion are larger than the diameters of the screening holes of the novel interlayer well casing used for soil aeration and located on the upper portion of the corresponding novel interlayer well casing. The construction steps include that the interlayer aeration well is put on a ground where a hole is to be formed; the interlayer aeration well is perpendicularly arranged in the well hole; the annular baffle is backfilled with low-breathable filter materials and high-breathable filter materials in a staggered manner, and the lower portion of the annular baffle is sequentially backfilled with the low-breathable filter materials and high-breathable filter materials, and the upper portion of the annular baffle is sequentially backfilled with the low-breathable filter materials and high-breathable filter materials; and after installation and backfilling, concrete is used for sealing the novel interlayer aeration well.
Description
Technical field
The present invention relates to the technical field of rehabilitating soil volatile contaminant, particularly relate to a kind of novel interlayer well casing for soil aerator, interlayer aeration well and construction method thereof.
Background technology
Current, the organic contamination of soil volatility increases the weight of day by day, and human health in serious threat.Air agitation (Airsparging, AS), by means of its distinctive original position, economy and efficient advantage, becomes the main method of administering the organic contamination of soil volatility.Its repair mechanisms utilize horizontal or vertical well, with aerator, fresh air is injected into the contaminated district of soil, take flow of fresh air as carrier, by pressure differential, volatile organic contaminant in soil is brought to aeration zone or earth's surface.
Usual AS aeration well mostly is individual well construction, and screen casing length and the degree of depth are fixed, and cannot change gas in position, dew point, underground, and well sieve sieve aperture directly contacts with soil simultaneously, is unfavorable for that gas uniform spreads.Therefore, when aeration well surrounding soil is heterogeneous body, the part that gas meeting differential permeability is strong, forms fixed gas passage by contaminant bands to earth's surface; And when aeration well surrounding soil is isotropic body, gas then can be uniformly distributed, by contaminant bands to earth's surface.Because traditional aeration well cannot realize multi-level, uniform aeration process to pollutant, design and develop a kind of modified aeration well, for overcoming the problems referred to above.
Summary of the invention
For prior art Problems existing, the embodiment of the present invention provides a kind of novel interlayer well casing for soil aerator, interlayer aeration well and construction method thereof, for the treatment of air agitation technology rehabilitating soil unsatalation zone volatile contaminant, increase the use flexibility ratio of aeration well, realize multi-level, uniform aeration process, improve pollutant treatment effect.
The embodiment of the present invention provides a kind of novel interlayer well casing for soil aerator, and it comprises: pipeline, multiple sieve aperture spaced apart on the tube wall of described pipeline, and the aperture of described sieve aperture increases to bottom gradually from pipeline top; Ring baffle, described ring baffle is fixed on the tube wall of described pipeline.
Preferably, the novel interlayer well casing for soil aerator also comprises floor, and described ring baffle end face is or/and bottom surface is arranged multiple floor, and described floor extends to the edge of described ring baffle from the tube wall of described pipeline.
Preferably, described sieve aperture is circular hole, and described sieve aperture is symmetrical and spaced apart along the tube wall of described pipeline, and the aperture of described sieve aperture increases to bottom gradually from pipeline top.
Preferably, the aperture of described sieve aperture is 0.3 ~ 1.5cm.
Preferably, described sieve aperture area occupied is 20% ~ 40% of described pipe wall surface area.
Preferably, the pipe range of described pipeline is 1.0 ~ 1.5m, and caliber is 5.0 ~ 10.0cm.
On the other hand, the invention provides a kind of novel interlayer aeration well for soil aerator, it comprises: the many novel interlayer well casings for soil aerator as described in the arbitrary claim in above-mentioned, each described end for the novel interlayer well casing of soil aerator removably connects successively and is communicated with and forms well casing, and the sieve diameter being positioned at the described novel interlayer well casing for soil aerator of bottom is greater than the sieve diameter for the novel interlayer well casing of soil aerator described in its top.
Preferably, the top of the described novel interlayer well casing for soil aerator is provided with external screw thread, and bottom is provided with internal thread, is threaded connection between the adjacent described novel interlayer well casing for soil aerator.
On the other hand, the invention provides a kind of construction method of the novel interlayer aeration well for soil aerator, comprise following construction procedure: the novel interlayer aeration well for soil aerator as described in the arbitrary claim in above-mentioned is put and is treating pore-forming ground; The described novel interlayer aeration well being used for soil aerator is vertically placed in wellhole; The ring baffle of the described novel interlayer well casing for the soil aerator low ventilative filtrate of staggered backfill and height are breathed freely filtrate, the below of described ring baffle backfills described low ventilative filtrate and height successively and to breathe freely filtrate, and top backfills described low ventilative filtrate and height successively and to breathe freely filtrate; Install and backfill complete, adopting concrete to shunt in a well to the described novel interlayer aeration well for soil aerator.
In addition, preferably, before construction procedure, also comprise the steps: that (a) is according to soil physico-chemical property, determines well location and the well depth of aeration well; B (), according to well depth, makes the some novel interlayer well casings for soil aerator as described in the arbitrary claim in above-mentioned; C () makes the novel interlayer aeration well for soil aerator as described in the arbitrary claim in above-mentioned.
According to a kind of novel interlayer well casing for soil aerator, interlayer aeration well and construction method thereof that the embodiment of the present invention provides, with the coupling of depthkeeping aeration head, can be used to process in the 20m of underground by the unsatalation zone soil that volatile organic matter pollutes, realize carrying out aeration in different depth pollutant region, increase the contact area of gas and polluted soil, improve the removal efficiency of volatile contaminant; According to the degree of depth of pollutant, fast several interlayer well casings can be combined into the improvement aeration well requiring length by screw thread, use for soil aerator; The effect intercepting layering is played in the ring baffle of interlayer well casing and the coupling of low ventilative, high ventilative filtrate, fresh air layering can be injected contaminated area, prevent the fresh air injected to be spilled over to earth's surface from well tubular wall simultaneously; The increase of the sieve aperture foundation buried depth of interlayer well casing progressively strengthens, and is beneficial to fresh air and contacts with polluted soil fully.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is some embodiments of the embodiment of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Accompanying drawing described herein is used to provide the further understanding to the embodiment of the present invention, forms a part of the present invention, and schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the longitudinal profile schematic diagram of the novel interlayer well casing for soil aerator of the embodiment of the present invention;
Fig. 2 is the horizontal section schematic diagram of the novel interlayer well casing for soil aerator of the embodiment of the present invention;
Fig. 3 is the longitudinal profile schematic diagram of the novel interlayer aeration well for soil aerator of the embodiment of the present invention;
Fig. 4 is the construction process schematic diagram of the novel interlayer aeration well for soil aerator of the embodiment of the present invention.
Reference numeral:
1: pipeline; 2: floor; 3: internal thread; 4: ring baffle; 5: sieve aperture;
6: external screw thread; 7: low ventilative filtrate; 8: high ventilative filtrate; 9: district to be repaired soil layer.
Detailed description of the invention
For making the object of the embodiment of the present invention, technical scheme and advantage clearly, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is a part of embodiment of the embodiment of the present invention, instead of whole embodiments.Based on the embodiment in the embodiment of the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
The main thought of the embodiment of the present invention is, according to the technical scheme of the embodiment of the present invention, fresh air is delivered to the improvement aeration well requirement degree of depth by earth's surface aerator by depthkeeping aeration head, and enters soil appointment contaminated area by sieve aperture.In the initial period of air Injection, the air zone near aeration point is growth spherical in shape, and the trend that air zone upwards increases under pressure differential effect starts to occupy an leading position.When air rises to ring baffle district, air thereunder gathers, and moves to horizontal direction, flows to certain depth contaminated soil region.Soil pollutant reduces the partial pressure on surface due to air flowing, and make pollutant accelerate to enter interstices of soil, the air injected continually produces thrust, makes pollutant enter interstices of soil by volatilization, is progressively taken to soil surface treatment system.After a collection of pollutant is taken out of soil, the pollutant being attached to contaminated area soil volatilizees and supplements pollutant levels in interstices of soil under concentration difference, realizes the lasting removal of pollutant in soil.
For making the object of the embodiment of the present invention, technical scheme and advantage clearly, below in conjunction with drawings and the specific embodiments, the present invention is described in further detail.
Fig. 1 is the longitudinal profile schematic diagram of the novel interlayer well casing for soil aerator of the embodiment of the present invention, and Fig. 2 is the horizontal section schematic diagram of the novel interlayer well casing for soil aerator of the embodiment of the present invention, as depicted in figs. 1 and 2:
The embodiment of the present invention provides a kind of novel interlayer well casing for soil aerator to comprise: pipeline 1 and ring baffle 4.
Pipeline 1 is generally straight tube, and multiple sieve aperture 5 spaced apart on the tube wall of pipeline 1, the aperture of sieve aperture 5 increases to bottom gradually from pipeline 1 top.
Preferably, the pipe range of pipeline 1 is 1.0 ~ 1.5m, and caliber is 5.0 ~ 10.0cm.Pipeline 1 is convenient to be made and transport.
Preferably, sieve aperture 5 is in circular hole, and be convenient to gas diffusion, sieve aperture 5 is spaced apart along the tube wall of pipeline 1, and conplane sieve aperture 5 is symmetrical, and the aperture of sieve aperture 5 increases to bottom gradually from pipeline 1 top.Preferably, the aperture of sieve aperture 5 is 0.3 ~ 1.5cm.In this aperture region, both can realize the even diffusion of air, not affect again the intensity of pipeline 1.
Because district to be repaired soil layer 9 soil permeability around aeration well is different, residing for soil, the degree of depth is darker, during process pollutant, required tolerance is larger, if the large sieve aperture 5 such as to arrange on pipeline 1, air relative to below above pipeline 1 more easily spreads, and is unfavorable for that air spreads uniformly, is unfavorable for removing the pollutant in soil.Therefore, every root pipeline 1 arranges the sieve aperture that aperture becomes large gradually from top to bottom, to guarantee gas uniform diffusion in pipeline 1, in order to promote that fresh air fully contacts with polluted soil.Preferably, sieve aperture 5 area occupied be pipeline 1 tube wall surface long-pending 20% ~ 40%.
Every root pipeline 1 tube wall is provided with at least one ring baffle 4, and ring baffle 4 is in same heart shaped, and the tube wall shape of its inner ring and pipeline 1 adapts, and outer shroud is circle or oval etc., is not limited this shape.Ring baffle 4 is fixing or be socketed on the tube wall of pipeline 1.In the present embodiment, ring baffle 4 is fixed by socket the tube wall lower end at pipeline 1.Ring baffle 4 is for carrying filtrate and filtrate 8 of being breathed freely by height, low ventilative filtrate 7 are separated, the fresh air preventing aerator from blasting is spilled over to earth's surface from the tube wall of pipeline and filtrate junction, ring baffle 4 is also for stopping that fresh air rises, fresh air is assembled thereunder, guide fresh air to move to horizontal direction, make fresh air flow to certain depth contaminated soil region.
Preferably, the external diameter of ring baffle 4 is 20.0 ~ 30.0cm, and wall thickness is 0.5 ~ 1.0cm.
Preferably, the novel interlayer well casing for soil aerator also comprises floor 2, floor 2 for connecting pipe 1 and ring baffle 4, to increase the intensity of ring baffle 4.Floor 2 is positioned at the end face of ring baffle 4 or bottom surface or end face and bottom surface, and ring baffle 4 arranges multiple interval and symmetrical floor 2, floor 2 extends to the edge of ring baffle 4 from pipeline 1 tube wall, and usual floor 2 selects triangular stall board.
In this example, 6 triangular stall boards are set at the upper surface of ring baffle 4.Floor 2 can strengthen the intensity of ring baffle 4.
Preferably, the wall thickness of floor 2 is 0.5 ~ 1.0cm.
Correspondingly the embodiment of the present invention also provides a kind of novel interlayer aeration well for soil aerator, the interlayer aeration well be made up of the novel interlayer well casing for soil aerator.
Fig. 3 is the vertical cross section schematic diagram of the novel interlayer aeration well for soil aerator of the embodiment of the present invention, as shown in Figure 3:
Novel interlayer aeration well for soil aerator comprises many above-mentioned interlayer well casings.
The many above-mentioned novel interlayer well casing ends for soil aerator are in turn connected to form the well casing of connection, the end of each novel interlayer well casing for soil aerator removably connects successively and is communicated with formation well casing, wherein, sieve aperture 5 aperture of novel interlayer well casing that every root is used for soil aerator increases to bottom gradually from top, and sieve aperture 5 diameter of the novel interlayer well casing for soil aerator being positioned at bottom is greater than sieve aperture 5 diameter of the novel interlayer well casing for soil aerator on its top.Preferably, sieve aperture 5 area occupied be for the novel interlayer well casing tube wall surface of soil aerator long-pending 20% ~ 40%.
Preferably, the top of the above-mentioned novel interlayer well casing for soil aerator is provided with external screw thread 6, and bottom is provided with internal thread 3, is threaded connection between the adjacent novel interlayer well casing for soil aerator.Also can be that buckle connects or other modes that removably connect, not be limited at this.
Preferably, pipe range for every root pipeline 1 of the novel interlayer well casing of soil aerator is 1.0 ~ 1.5m, by the connection between pipeline 1, can arrange in pairs or groups for the pipe range of the novel interlayer well casing of soil aerator flexibly, usually, pipe range for the novel interlayer well casing of soil aerator is less than or equal to 20m, can ensure to have good treatment effect.
The novel interlayer aeration well for soil aerator that the embodiment of the present invention provides is corresponding with the architectural feature of the novel interlayer well casing for soil aerator, can be cross-referenced, repeats no longer one by one here.
How introduction makes the novel interlayer aeration well for soil aerator in first step further below.
First, according to soil physico-chemical property, comprise according to soil pollution species, concentration, distribution, determine well location and the well depth of aeration well;
Secondly, according to well depth, what determine the novel interlayer aeration well of soil aerator should establish total length, determines the radical of the novel interlayer well casing of soil aerator, determines the length of pipeline and should establish sieve aperture number and aperture.Particularly, make some pipelines 1, and darker according to pipeline 1 buried depth, offer the principle that sieve aperture 5 is larger, the tube wall of every root pipeline 1 offers sieve aperture 5, the tube wall of pipeline 1 arranges ring baffle 4 and floor 2.Sieve aperture 5 on every root pipeline 1 increases to bottom gradually from top, and, when assembling between pipeline 1, should guarantee that sieve aperture 5 aperture of the pipeline 1 being positioned at bottom is greater than sieve aperture 5 aperture of the pipeline 1 on its top.
Then, some pipelines 1 are bonded to successively the novel interlayer aeration well being used for soil aerator of preset length by the internal thread 3 of end, external screw thread 6 Connecting groups.
During installation, pipeline 1 buried depth is darker, and sieve aperture 5 aperture on it should be larger, guarantees the air demand that bottom pipe 1 can provide enough.
So far, the novel interlayer aeration well for soil aerator completes.
Introduce the construction procedure of the novel interlayer aeration well being used for soil aerator below further.
Fig. 4 is the construction process schematic diagram of the novel interlayer aeration well for soil aerator of the embodiment of the present invention, as shown in Figure 4:
Step 1, puts the above-mentioned novel interlayer aeration well for soil aerator and is treating pore-forming ground;
The some pipelines 1 made are bonded to successively the novel interlayer aeration well being used for soil aerator of preset length by the internal thread 3 of end, external screw thread 6 Connecting groups, are placed on and treat on the ground of pore-forming;
Step 2, is vertically placed in the above-mentioned novel interlayer aeration well for soil aerator in wellhole;
The novel interlayer aeration well combined vertically is put into wellhole, in the process of wellhole Cheng Jing, the diameter of wellhole is greater than the diameter of ring baffle 4, diameter difference at least will ensure can expeditely can be passed through by the pvc pipe of internal diameter at 20mm to 32mm, so after novel interlayer aeration well vertically puts into wellhole, there is certain space between ring baffle 4 and wellhole;
Step 3, to breathe freely filtrate 8 to the ring baffle 4 low ventilative filtrate 7 of staggered backfill of pipeline 1 and height, and the below of ring baffle 4 backfills low ventilative filtrate 7 and height successively and to breathe freely filtrate 8, and top backfills low ventilative filtrate 7 and height successively and to breathe freely filtrate 8;
With the pvc pipe of internal diameter at 20mm to 32mm, filtrate 8 of low ventilative filtrate 7 and height being breathed freely is staggered from earth's surface is backfilled to corresponding well hole depth, when the region below backfill ring baffle 4, pvc pipe needs through space between ring baffle 4 and wellhole, filtrate is delivered to ring baffle 4 lower zone, during backfill, need to control low ventilative filtrate 7 and height to breathe freely the backfill amount of filtrate 8, to ensure that the top section near ring baffle 4 is low ventilative filtrate 7, the underclad portion near ring baffle 4 is high ventilative filtrate 8;
Preferably, low ventilative filtrate 7 is selected and is met water expandable bentonite, and high ventilative filtrate 8 selects that intensity is high, physico-chemical property is stablized and the haydite of the 10mm particle diameter of wide material sources;
The bentonite of water-swellable selected by low ventilative filtrate, effect is the character utilizing bentonitic water-swellable and poor air permeability, gap seals between ring baffle 4 and wellhole is lived, the fresh air preventing aerator from blasting is spilled over to earth's surface from the tube wall of the space between ring baffle 4 and wellhole and pipeline 1 and filtrate junction, simultaneously, bentonite also has stronger suction-operated, effectively can adsorb the polluter in contaminatedground;
Step 4, installs and after filtrate backfill, adopts concrete to shunt in a well to the above-mentioned novel interlayer aeration well for soil aerator, so far, can carry out soil aerator reparation as required.
In sum, according to the technical scheme of the embodiment of the present invention, according to a kind of novel interlayer well casing for soil aerator, interlayer aeration well and construction method thereof that the embodiment of the present invention provides, by multiple placed in series being formed according to well depth the interlayer aeration well of preset length, increase the use flexibility ratio of aeration well, pipe wall arranges according to actual needs tolerance the sieve aperture that aperture increases gradually, realize multi-level, uniform aeration process, and adopt ring baffle to be used for separating high ventilative filtrate, low ventilative filtrate raising pollutant treatment effect.
Device embodiment described above is only schematic, and the wherein said unit illustrated as separating component or can may not be and physically separates.Those of ordinary skill in the art, when not paying performing creative labour, are namely appreciated that and implement.
It is last it is noted that above embodiment is only in order to illustrate technical scheme of the present invention, be not intended to limit, although with reference to previous embodiment to invention has been detailed description, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme described in foregoing embodiments, or equivalent replacement is carried out to wherein portion of techniques feature, and these amendments or replacement, do not make the essence of appropriate technical solution depart from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (10)
1., for a novel interlayer well casing for soil aerator, it is characterized in that, it comprises:
Pipeline, multiple sieve aperture spaced apart on the tube wall of described pipeline, the aperture of described sieve aperture increases to bottom gradually from pipeline top;
Ring baffle, described ring baffle is fixed on the tube wall of described pipeline.
2., as claimed in claim 1 for the novel interlayer well casing of soil aerator, it is characterized in that, also comprise floor, described ring baffle end face is or/and bottom surface is arranged multiple floor, and described floor extends to the edge of described ring baffle from the tube wall of described pipeline.
3. as claimed in claim 1 for the novel interlayer well casing of soil aerator, it is characterized in that, described sieve aperture is circular hole, and described sieve aperture is symmetrical and spaced apart along the tube wall of described pipeline, and the aperture of described sieve aperture increases to bottom gradually from pipeline top.
4., as claimed in claim 1 for the novel interlayer well casing of soil aerator, it is characterized in that, the aperture of described sieve aperture is 0.3 ~ 1.5cm.
5., as claimed in claim 1 for the novel interlayer well casing of soil aerator, it is characterized in that, described sieve aperture area occupied is 20% ~ 40% of described pipe wall surface area.
6., as claimed in claim 1 for the novel interlayer well casing of soil aerator, it is characterized in that, the pipe range of described pipeline is 1.0 ~ 1.5m, and caliber is 5.0 ~ 10.0cm.
7., for a novel interlayer aeration well for soil aerator, it is characterized in that, it comprises:
The many novel interlayer well casings for soil aerator as described in the arbitrary claim in claim 1-6, each described end for the novel interlayer well casing of soil aerator removably connects successively and is communicated with and forms well casing, and the sieve diameter being positioned at the described novel interlayer well casing for soil aerator of bottom is greater than the sieve diameter for the novel interlayer well casing of soil aerator described in its top.
8. as claimed in claim 9 for the novel interlayer aeration well of soil aerator, it is characterized in that, the top of the described novel interlayer well casing for soil aerator is provided with external screw thread, and bottom is provided with internal thread, is threaded connection between the adjacent described novel interlayer well casing for soil aerator.
9., for a construction method for the novel interlayer aeration well of soil aerator, comprise following construction procedure:
The novel interlayer aeration well for soil aerator as described in the arbitrary claim in claim 7-8 is put and is treating pore-forming ground;
The described novel interlayer aeration well being used for soil aerator is vertically placed in wellhole;
The ring baffle of the described novel interlayer well casing for the soil aerator low ventilative filtrate of staggered backfill and height are breathed freely filtrate, the below of described ring baffle backfills described low ventilative filtrate and described height successively and to breathe freely filtrate, and top backfills described low ventilative filtrate and described height successively and to breathe freely filtrate;
Install and backfill complete, adopting concrete to shunt in a well to the described novel interlayer aeration well for soil aerator.
10., as claimed in claim 9 for the construction method of the novel interlayer aeration well of soil aerator, it is characterized in that, also comprised the steps: before construction procedure
A (), according to soil physico-chemical property, determines well location and the well depth of aeration well;
B (), according to well depth, makes the some novel interlayer well casings for soil aerator as described in the arbitrary claim in claim 1-6;
C () makes the novel interlayer aeration well for soil aerator as described in the arbitrary claim in claim 7-8.
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| CN107891061A (en) * | 2018-01-05 | 2018-04-10 | 苏州科技大学 | A kind of soil oxygen-increasing device |
| CN109985885A (en) * | 2019-04-25 | 2019-07-09 | 湖南现代环境科技股份有限公司 | A kind of bioreactor landfill intensive treatment system and method |
| CN111250523A (en) * | 2020-01-15 | 2020-06-09 | 北京石油化工学院 | Gas thermal desorption heating well with longitudinal soil heated uniformly |
| CN112474761A (en) * | 2020-11-16 | 2021-03-12 | 中国人民大学 | Sectional combined type injection well system |
| CN113532940A (en) * | 2021-06-23 | 2021-10-22 | 成都理工大学 | Multifunctional test testing equipment for repairing heterogeneous soil groundwater |
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