CN104594327B - A kind of Ground Water Pumping during Excavation Bao Quan recharges integrated apparatus - Google Patents
A kind of Ground Water Pumping during Excavation Bao Quan recharges integrated apparatus Download PDFInfo
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- CN104594327B CN104594327B CN201510016743.2A CN201510016743A CN104594327B CN 104594327 B CN104594327 B CN 104594327B CN 201510016743 A CN201510016743 A CN 201510016743A CN 104594327 B CN104594327 B CN 104594327B
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D19/00—Keeping dry foundation sites or other areas in the ground
- E02D19/06—Restraining of underground water
- E02D19/10—Restraining of underground water by lowering level of ground water
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Abstract
The invention discloses a kind of Ground Water Pumping during Excavation Bao Quan and recharge integrated apparatus, including: recharge that Water quality processing system one end is connected with dewatering well, the other end is sequentially connected in series water quality monitoring system, pressurize collecting system, wellhead assembly and inverted well; The subsoil water extracted out, by recharging Water quality processing system and water quality monitoring system carries out water analysis, recharges water quality requirement if meeting, then enter pressurization collecting system, and the water of pressurization collecting system enters inverted well with constant flow, constant-pressure by recharging wellhead assembly; Otherwise, return to and recharge Water quality processing system and again water quality be analyzed and process. The method have the benefit that by groundwater recharge technology, can effectively control stablizing of level of ground water near construction area, it is prevented that neighbouring stratum deformation, reduce the construction security threat to neighbouring resident.
Description
Technical field
The present invention relates to base pit dewatering recharging technique field, recharge integrated apparatus particularly to a kind of Ground Water Pumping during Excavation Bao Quan.
Background technology
The way being generally adopted water-stop curtain that conventional region foundation pit construction water yield is big, but common water seal for deep foundation pit curtain cost is high, and artesian water, low pressure water stagnant water effect are poor, a lot of water leak accident occur. First recharging technique occurs in base pit dewatering regions, domestic hydrology complicated geology area such as Shanghai, but for having the region of the hydrogeologic condition of uniqueness, such as water level is higher, head difference is less etc. causes that ordinary straight takes back irrigation technology and can not meet far away base pit dewatering well yield, and common pressurization is recharged and can be produced to recharge the phenomenons such as borehole wall overflow. Because of the particularity of Jinan Spring Region system, to recharging water quality requirement height, common recharging technique can not reach supply spring domain system water quality requirement.
Geohydrologic unit for relative closure, such as Jinan Spring Region system, excretion total amount is basically unchanged, excretion pathway is mainly through spring water excretion, domestic water and excavation of foundation pit precipitation etc., the method that must adopt base pit dewatering reduces excavation formation water grease head highness, it is prevented that the base plate of foundation pit pressure-bearing Shuitu being likely to cause gushes the security threat to foundation ditch. But it is as in foundation ditch level of ground water and declines, spring water being gushed and causes great threat, former water-bearing layer soil body effective stress increases on the other hand, causes the uneven consolidation of the soil body, cause differential settlement within the scope of cone of depression, threaten resident's safety near construction safety and boundary of works area. For solving base pit dewatering, surrounding and Bao Quan are affected, the way of water-stop curtain is generally set, or design reduces the excavation of foundation pit degree of depth as far as possible, but so serious hindering and quality of life of the development in city and spring city resident, under special hydrogeologic condition, water-stop curtain difficulty of construction is big and cost is high. Jinan Spring Region system is the geohydrologic unit of a relative closure, excretion total amount is basically unchanged, excretion pathway is mainly through spring water excretion, domestic water and excavation of foundation pit precipitation etc., and large-scale excavation of foundation pit precipitation may account for very big proportion, and gushing of spring water in serious threat.Therefore the recharging technique under specific condition is needed to be promoted and apply.
Currently mainly in-problem region is Quaternary aquifer, this stratum watery is good, water yield is big, water level is higher, the amount of recharging of common recharging technique can not meet base pit dewatering water yield, and when adopting persistent pressure to recharge, common well drilling technology can produce rock borehole wall overflow phenomena, common direct recharging technique be also possible to can destructively sewerage, affect the quality of subsoil water.
Summary of the invention
The purpose of the present invention is contemplated to solve above-mentioned technical problem, it is provided that a kind of Ground Water Pumping during Excavation Bao Quan recharges integrated apparatus, and this device effectively increases and recharges the water yield, reduces the engineering construction impact on spring domain system; Disclosure satisfy that common persistence pressurization recharges process without borehole wall overflow phenomena, recharge water matter disclosure satisfy that spring domain system supply water quality requirement.
To achieve these goals, the present invention adopts the following technical scheme that
A kind of Ground Water Pumping during Excavation Bao Quan recharges integrated apparatus, including: at least one dewatering well, at least one inverted well, recharge Water quality processing system, pressurization collecting system, water quality monitoring system and recharge wellhead assembly;
Described recharge that Water quality processing system one end is connected with dewatering well, the other end is sequentially connected in series water quality monitoring system, pressurization collecting system, wellhead assembly and inverted well;
The subsoil water extracted out, by recharging Water quality processing system and water quality monitoring system carries out water analysis, recharges water quality requirement if meeting, then enter pressurization collecting system, and the water of pressurization collecting system enters inverted well with constant flow, constant-pressure by recharging wellhead assembly; Otherwise, return to and recharge Water quality processing system and again water quality be analyzed and process.
The described Water quality processing system that recharges includes precipitation treatment box and Water-quality treater, described precipitation treatment box is connected with Water-quality treater, described precipitation treatment box is connected with dewatering well by the first force (forcing) pump, and described Water-quality treater and precipitation treatment box are connected with water quality monitoring system respectively.
Described water quality detection system includes: water quality detection instrument, back-water valve (BWV) and water intaking valve; Described water quality detection instrument is connected with back-water valve (BWV) and water intaking valve respectively; The whether qualified opening and closing controlling back-water valve (BWV) and water intaking valve respectively of water quality according to detection of the water quality detection instrument;
Described water intaking valve is arranged on water quality monitoring system with on the connecting line of pressurization collecting system, and described back-water valve (BWV) is arranged on the connecting line of water quality monitoring system and precipitation treatment box.
Described pressurization collecting system includes flow pressure and regulates system and water collecting equipment, and described flow pressure regulates system and is connected with water collecting equipment, and described flow pressure regulates system and is connected with wellhead assembly, and water collecting equipment is connected with water quality monitoring system.
Described flow pressure regulates system and includes flow pressure adjustment device and the flow meter being connected respectively with it and Pressure gauge; Regulate at flow pressure and device and manometric connecting line arrange sensor-based system.
Described wellhead assembly includes recharging passage, return and raise passage and air bleeding valve, recharge valve and return and raise valve, wherein, air bleeding valve is arranged on well casing, is used for controlling well inner air tube, recharge valve to be arranged at and recharge passage upper end, return and raise valve and be arranged at back and raise passage upper end; Recharge passage and return and raise passage and be all connected with well casing.
Described inverted well includes underground component and overcoat, and wherein, described underground component includes the well casing and the filter pipe that are sequentially connected from top to bottom;Underground component is connected with wellhead assembly, overcoat includes double-deck sealing layer, water proof fixed layer and double medium filtration layer, double-deck sealing layer is arranged at outside well casing, the arranged outside of double-deck sealing layer has water proof fixed layer, double medium filtration layer is included outside filter pipe, filter pipe lower end is provided with pump chamber, is provided with back and raises immersible pump in pump chamber.
Described double-deck sealing layer, including the fixing sealing layer of concrete and clay ball sealing layer, wherein, the fixing sealing layer of concrete is arranged at well casing and wellhead component junction and well casing upper end, and described clay ball sealing layer is arranged at well casing lower end; The fixing sealing layer arranged outside of described concrete has cement injection water barrier, extends to the junction of the fixing sealing layer of concrete and clay ball sealing layer.
Described double medium filtration layer, fills out gravel bed including internal layer quartz sand and limestone rubble fills out gravel bed, and internal layer quartz sand is filled out gravel bed and is wrapped in the outside of filter pipe, and limestone rubble is filled out gravel bed wrapping inner layer quartz sand and filled out gravel bed; It is 2-4mm that described internal layer quartz sand fills out the ballast grain sizes of gravel bed; It is 5-20mm that limestone rubble fills out the ballast grain sizes of gravel bed.
Raise immersible pump for described time and be arranged at distance inverted well shaft bottom 0.3-0.7m, fully blocking float is discharged, it is ensured that Hui Yang directly arrives wellhead component by well casing.
The method have the benefit that
By groundwater recharge technology, can effectively control stablizing of level of ground water near construction area, it is prevented that neighbouring stratum deformation, reduce the construction security threat to neighbouring resident.
The balance of the supply of spring domain system, runoff, excretion can be kept by groundwater recharge technology, effectively reduce the engineering construction impact on spring water water level.
By groundwater recharge technology, it is possible to be effectively increased and recharge the water yield, making engineering construction excretion, supply in spring domain system reach a poised state, what protect spring water stablizes the amount of gushing.
By groundwater recharge technology, it is possible to reduce the engineering construction destruction to existing hydrogeological environment, protect the underground environment of spring territory scope.
By groundwater recharge technology, can improve and recharge water quality, it is to avoid recharge and ground water regime water quality is damaged, it is also possible to be greatly increased inverted well and return the cycle of raising, greatly add and recharge efficiency and recharge cost.
Groundwater recharge technology, has processed the emission problem of base pit dewatering, slow down municipal pipeline pressure. Persistently increasing while the amount of recharging, process borehole wall overflow phenomena, made to recharge and carry out under dry, a safe environment.
Accompanying drawing explanation
Fig. 1 is that embodiment of the present invention Ground Water Pumping during Excavation Bao Quan recharges integrated apparatus structural representation;
Fig. 2 is wellhead assembly structural representation of the present invention;
Fig. 3 is inverted well structural representation of the present invention.
Wherein, 1. dewatering well, 2. settling tank processes mouth, 3. precipitation dividing plate, 4. precipitation treatment box, 5. Water-quality treater, 6. water quality monitoring instrument, 7. back-water valve (BWV), 8. water intaking valve, 9. water collecting equipment, 10. flow pressure regulates device, 11. flow meter, 12. Pressure gauge, 13. sensor-based system, 14. drain tap, 15. recharge passage, 16. return and raise passage, 17. inverted well, 18. the water quality monitoring system of recharging, 19. wellhead assembly, 20. pressure flow regulates system, 21. recharge valve, 22. return and raise valve, 23. sealing layer fixed by concrete, 24. one is split into well slip casting, 25. cement injection water barrier, 26. clay ball sealing layer, 27. two perforate footpaths, 28. well casings, 29. limestone rubbles fill out gravel bed, and 30.PVC pipe is layered, and 31. internal layer quartz sands fill out gravel bed, 32. filter pipes, raise immersible pump 33. times.
Detailed description of the invention
Below in conjunction with drawings and Examples, the specific embodiment of the present invention is described in further detail.
For Jinan Spring Region system, Jinan Spring Region supply, runoff, discharge area, hydrogeologic condition is better, Quaternary pore water, igneous rock crevice water, limestone karst water three class water-bearing layer feed mutually contact, there is again different Migration mark, constituting the distinctive hydrogeological system in Jinan, it is big that feeding area, spring territory has water yield, the feature that water level is higher.
Above-mentioned special hydrology geological conditions, adopts novel recirculation process, effectively increases and recharges the water yield, reduces the engineering construction impact on spring domain system. This technology well drilling technology can meet common persistence pressurization and recharge process without borehole wall overflow phenomena, and recharge water matter disclosure satisfy that spring domain system supply water quality requirement.
As shown in Figure 1, this technology is that a kind of Ground Water Pumping during Excavation Bao Quan recharges integrated apparatus, including at least one dewatering well 1, at least one inverted well 17, one is recharged water quality detection system 18, collecting system of pressurizeing, recharges water quality monitoring system 18 and recharge wellhead assembly 19;
When multiple dewatering well 1, each dewatering well 1 is respectively connecting to precipitation treatment box 4; When multiple inverted well 17, each inverted well 17 regulates system 20 with pressure flow respectively after being all connected with wellhead assembly 19 and is connected.
Recharge Water quality processing system and include precipitation treatment box 4 and Water-quality treater 5, precipitation treatment box 4 is connected with Water-quality treater 5, precipitation treatment box 4 is connected with dewatering well 1 by the first force (forcing) pump, Water-quality treater 5 and precipitation treatment box 4 respectively with recharge water quality monitoring system 18 and be connected.
Wherein precipitation treatment box 4 includes settling tank process mouth 2 and precipitation dividing plate 3, and Water-quality treater 5 one end is connected with precipitation treatment box 4, and the other end is connected with recharging water quality monitoring system 18.
Recharge water quality monitoring system 18 and include water quality monitoring instrument 6, back-water valve (BWV) 7, water intaking valve 8, water quality monitoring instrument 6 and back-water valve (BWV) 7, water intaking valve 8 connects respectively through sensor, recharge water quality monitoring system 18 other end to be connected with water collecting equipment 9, water collecting equipment 9 other end regulates device 10 with flow pressure and is connected, flow pressure regulates device 10 and enters wellhead assembly 19 by flow meter 11 and Pressure gauge 12, flow meter 11, Pressure gauge 12 controls flow pressure by sensor-based system 13 and regulates device 10, wellhead assembly 19 includes drain tap 14, recharge passage 15, return and raise passage 16, wellhead assembly 19 is connected with inverted well 17.
Wherein water quality monitoring system back-water valve (BWV) 7 connects a water quality testing meter (not marking in figure), analyzes the defective reason of water quality, reenters settling tank by analyzing and processing subsystem, again monitors subsequently into water quality monitoring system.
As it is shown on figure 3, inverted well 17 includes wellhead assembly 19, common steel tube, filter pipe 32 and pump chamber from top to bottom successively, outside is followed successively by double-deck sealing layer, water barrier and double medium filtration under upper. Filter pipe 32 is bridge type filter pipe, and double medium filtration layer is that gradual change type filters gravel material, and nexine gravel material adopts quartz sand, grains of sand diameter 2-4mm, outer layer gravel material adopts limestone rubble, particle diameter 4-20mm, upper part of double water barrier, outer layer is grouting cement layer, and internal layer is rammed concrete layer.
This ground water recharging well 17 is from top to bottom, including wellhead assembly 19 from inside to outside successively, concrete fixes sealing layer 23, cement injection water barrier 25, clay ball sealing layer 26, well casing 28, limestone rubble fills out gravel bed 29, stone sizes 5-20mm, internal layer quartz sand fills out gravel bed 31, particle diameter 2-4mm, bridge type filter pipe 32, returns and raises immersible pump 33.In this enforcement, one is split into well slip casting 24 is out that 600mm becomes well grouting process, after cement setting is fixing, again adopting 500mm aperture Cheng Jing, the adhesive power of the fixing sealing layer 23 of concrete and cement injection water barrier 25 grouting cement is far longer than the adhesive power with Quaternary system.
As shown in Figure 2, wherein wellhead assembly 19 mainly includes recharging passage 15 and raises passage 16, drain tap 14 with returning, recharge valve 21, returns and raise valve 22, when starting to recharge, in pit shaft, air can enter water-bearing layer along with recharge water, cause gas bubble blockage, control air in pit shaft when recharging and carrying out with 1 air bleeding valve. Carrying out along with recharging, because plugging reason, the amount of recharging can decay gradually, it is therefore desirable to is periodically subject to Hui Yang, will recharge valve 21 and close, and opens back and raises valve 22, starts shaft bottom immersible pump.
Recharge valve 21 to be arranged at and recharge on passage, return and raise valve 22 and be arranged at back and raise on passage, shorten back the time of raising, improve and recharge efficiency.
Gravel is filled out in this technology well drilling technology pvc pipe layering 30, after completing to wash downhole tubular, additionally uses to enter under diameter 400mmPVC pipe, inserts 2-4mm quartz sand by calculating internal layer, and outer layer inserts 5-20mm limestone gravel, recharges water-bearing layer thickness until exceeding. Top concrete is closely knit after inserting, so as to fully bond with cement.
It is close with water-bearing layer macadam gradating that its ectomesoderm fills out gravel macadam gradating requirement.
Perforate uses 600mm aperture Cheng Jing, adopts cement injection to relative water resisting layer, then uses two to open 500mm aperture 27 Cheng Jing again, fully solves borehole wall overflow phenomena. Inverted well is followed successively by wellhead component, steel pipe, filter pipe and pump chamber from top to bottom, fills out gravel and adopt layering to fill out gravel way between filter pipe and water-bearing layer, and internal layer adopts quartz sand, particle diameter 2-4mm, and outer layer adopts carbonate rubble, particle diameter 5-20mm. Wherein layering is filled out gravel and is utilized common PVC pipe, caliber 400mm, successively inserts by calculating, considerably increases back the cycle of raising. Top sealing layer to wellhead component adopts rammer filling jarring closely knit, makes rammer layer fully fully bond with grouting cement.
Setting back bottom well casing and raise immersible pump 33, this time raises immersible pump 33 from shaft bottom 0.5m, it is possible to make back to raise better effects if, moreover it is possible to fully blocking float being discharged, Hui Yangke directly arrives wellhead component by well casing, shortens back the time of raising, greatly improves and recharge efficiency.
The use flow process of this technology is: reduce Water Level in Foundation Pit in engineering construction first with the water extracted in dewatering well 1, the subsoil water extracted out enters precipitation treatment box 4, the other end of precipitation treatment box 4 is entered by precipitating dividing plate 3, regularly settling tank is processed mouth 2 to discharge, then pass through Water-quality treater 5 and water quality monitoring instrument 6 carries out water analysis, recharge water quality ask if meeting, water collecting equipment is recharged in entrance, if not meeting water quality requirement, then again water quality it is analyzed and processes, return to precipitation treatment box 4, the water of water collecting equipment 9 regulates system 20 by pressure flow and enters inverted well 17 with constant flow rated pressure by wellhead assembly 19,
Wherein recharge the initial stage, for preventing pit shaft inner air from causing gas bubble blockage with entrance water-bearing layer of pouring water, drain tap 14 in wellhead assembly need to be opened, by air emptying in pit shaft.
Carrying out along with recharging, aquifer permeability slowly weakens, and closes and recharges passage 15, opens back and raises passage 16 valve and carry out back raising process.
The specific embodiment of the present invention is described in conjunction with accompanying drawing although above-mentioned; but not limiting the scope of the invention; one of ordinary skill in the art should be understood that; on the basis of technical scheme, those skilled in the art need not pay various amendments or deformation that creative work can make still within protection scope of the present invention.
Claims (9)
1. Ground Water Pumping during Excavation Bao Quan recharges an integrated apparatus, it is characterized in that, including: at least one dewatering well, at least one inverted well, recharge Water quality processing system, pressurization collecting system, water quality monitoring system and recharge wellhead assembly;
Described recharge that Water quality processing system one end is connected with dewatering well, the other end is sequentially connected in series water quality monitoring system, collecting system of pressurizeing, recharge wellhead assembly and inverted well;
Described pressurization collecting system includes flow pressure and regulates system and water collecting equipment, and described flow pressure regulates system and is connected with water collecting equipment, and described flow pressure regulates system and is connected with recharging wellhead assembly, and water collecting equipment is connected with water quality monitoring system;
The subsoil water extracted out, by recharging Water quality processing system and water quality monitoring system carries out water analysis, recharges water quality requirement if meeting, then enter pressurization collecting system, and the water of pressurization collecting system enters inverted well with constant flow, constant-pressure by recharging wellhead assembly; Otherwise, return to and recharge Water quality processing system and again water quality be analyzed and process.
2. a kind of Ground Water Pumping during Excavation Bao Quan as claimed in claim 1 recharges integrated apparatus, it is characterized in that, the described Water quality processing system that recharges includes precipitation treatment box and Water-quality treater, described precipitation treatment box is connected with Water-quality treater, described precipitation treatment box is connected with dewatering well by the first force (forcing) pump, and described Water-quality treater and precipitation treatment box are connected with water quality monitoring system respectively.
3. a kind of Ground Water Pumping during Excavation Bao Quan as claimed in claim 1 recharges integrated apparatus, it is characterized in that, described water quality monitoring system includes: water quality detection instrument, back-water valve (BWV) and water intaking valve; Described water quality detection instrument is connected with back-water valve (BWV) and water intaking valve respectively; The whether qualified opening and closing controlling back-water valve (BWV) and water intaking valve respectively of water quality according to detection of the water quality detection instrument;
Described water intaking valve is arranged on water quality monitoring system with on the connecting line of pressurization collecting system, and described back-water valve (BWV) is arranged on the connecting line of water quality monitoring system and precipitation treatment box.
4. a kind of Ground Water Pumping during Excavation Bao Quan as claimed in claim 1 recharges integrated apparatus, it is characterized in that, described flow pressure regulates system and includes flow pressure adjustment device and the flow meter being connected respectively with it and Pressure gauge; Regulate at flow pressure and device and manometric connecting line arrange sensor-based system.
5. a kind of Ground Water Pumping during Excavation Bao Quan as claimed in claim 1 recharges integrated apparatus, it is characterized in that, the described wellhead assembly that recharges includes recharging passage, returns and raise passage and air bleeding valve, recharge valve and return and raise valve, wherein, air bleeding valve is arranged on well casing, for controlling well inner air tube, recharge valve and be arranged at and recharge passage upper end, return and raise valve and be arranged at back and raise passage upper end; Recharge passage and return and raise passage and be all connected with well casing.
6. a kind of Ground Water Pumping during Excavation Bao Quan as claimed in claim 1 recharges integrated apparatus, it is characterized in that, described inverted well includes underground component and overcoat, and wherein, described underground component includes the well casing and the filter pipe that are sequentially connected from top to bottom; Underground component is connected with recharging wellhead assembly, overcoat includes double-deck sealing layer, water proof fixed layer and double medium filtration layer, double-deck sealing layer is arranged at outside well casing, the arranged outside of double-deck sealing layer has water proof fixed layer, double medium filtration layer is included outside filter pipe, filter pipe lower end is provided with pump chamber, is provided with back and raises immersible pump in pump chamber.
7. a kind of Ground Water Pumping during Excavation Bao Quan as claimed in claim 6 recharges integrated apparatus, it is characterized in that, described double-deck sealing layer, including the fixing sealing layer of concrete and clay ball sealing layer, wherein, the fixing sealing layer of concrete is arranged at well casing and recharges wellhead assembly junction and well casing upper end, and described clay ball sealing layer is arranged at well casing lower end; The fixing sealing layer arranged outside of described concrete has cement injection water barrier, extends to the junction of the fixing sealing layer of concrete and clay ball sealing layer.
8. a kind of Ground Water Pumping during Excavation Bao Quan as claimed in claim 6 recharges integrated apparatus, it is characterized in that, described double medium filtration layer, fill out gravel bed including internal layer quartz sand and limestone rubble fills out gravel bed, internal layer quartz sand is filled out gravel bed and is wrapped in the outside of filter pipe, and limestone rubble is filled out gravel bed wrapping inner layer quartz sand and filled out gravel bed; It is 2-4mm that described internal layer quartz sand fills out the ballast grain sizes of gravel bed; It is 5-20mm that limestone rubble fills out the ballast grain sizes of gravel bed.
9. a kind of Ground Water Pumping during Excavation Bao Quan as claimed in claim 6 recharges integrated apparatus, it is characterized in that, raise immersible pump for described time and be arranged at distance inverted well shaft bottom 0.3-0.7m, fully blocking float is discharged, it is ensured that Hui Yang is directly arrived by well casing and recharges wellhead assembly.
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CN204435350U (en) * | 2015-01-13 | 2015-07-01 | 济南轨道交通集团有限公司 | A kind of Ground Water Pumping during Excavation Bao Quan recharges integrated apparatus |
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CN106847048A (en) * | 2017-02-28 | 2017-06-13 | 济南轨道交通集团有限公司 | Simulate the emulation Boundary Test system of artesian groundwater recharge |
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