CN109164211A - A kind of seawater invasion simulation test sandbox - Google Patents
A kind of seawater invasion simulation test sandbox Download PDFInfo
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- CN109164211A CN109164211A CN201811037034.2A CN201811037034A CN109164211A CN 109164211 A CN109164211 A CN 109164211A CN 201811037034 A CN201811037034 A CN 201811037034A CN 109164211 A CN109164211 A CN 109164211A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D9/00—Level control, e.g. controlling quantity of material stored in vessel
- G05D9/02—Level control, e.g. controlling quantity of material stored in vessel without auxiliary power
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Abstract
The invention discloses a kind of seawater invasion simulation test sandboxes, belong to experiment simulator technical field, test sand box middle position is provided with the dielectric chamber for holding the water-bearing medias such as sandstone, soil, and test sand box or so both ends are respectively arranged with the seawater room for being loaded with dyeing seawater, the freshwater room for being loaded with deionized water；Test sand box main body uses acrylic board；Two sections in dielectric chamber middle position are provided with not only can mutual seamless overlap joint but also the rubber layer of pluggable insertion case；Seawater room and freshwater room, which divide, tri- Room ABC；The room seawater C and the dielectric chamber in test sand box middle position are separated by porous plate and nylon wire；Seawater room and freshwater room upper and lower ends are provided with water tank and recycling bins.Seawater invasion simulation test sandbox provided by the invention can be convenient the flexible control realized to water level；Length is simulated in change that can also be convenient, flexible, can not only measure concentration and pressure at given point, moreover it is possible to the more freely determination point to be measured.
Description
Technical field
The invention belongs to experiment simulator technical fields, and in particular to a kind of seawater invasion simulation test sandbox.
Background technique
Seawater invasion is the major issue that coastal cities industrial and agricultural development faces, since unreasonable mining of groundwater is living
It is dynamic, cause local coastal aquifer ground water regime unbalance, surface subsidence, seawater invasion and littoral zone underground water pollution etc. occurs
The problems of geo-environment.The key of prevention and treatment and research seawater invasion problem is to understand the mechanism of seawater invasion, could grasp sea in this way
The status of water invasion, the development trend of Accurate Prediction seawater invasion.Numerical simulation and object are mainly passed through to the research of seawater invasion
Reason two kinds of means of simulation.
Currently, sandbox modeling method is simulated seawater invasion phenomenon, the important method of its mechanism, but traditional sandbox meeting are studied
There are the following problems: traditional sandbox does not have a kind of more perfect water level control apparatus；After traditional sandbox completes
Length cannot change, and flexibility is poor；Traditional sandbox can also deposit some test datas during the test and be difficult to the problem of obtaining
Deng.
Summary of the invention
The technical problem to be solved by the invention is to provide a kind of seawater invasion simulation test sandboxes, pass through test sand box
Water-level control apparatus can be convenient the flexible control realized to water level；Sandbox can also be convenient, flexible change simulate length, gram
Traditional unalterable disadvantage of sandbox length is taken；The concentration and pressure at given point can be also measured by this sandbox,
It can also the more freely determination point to be measured.
In order to solve the above technical problems, the technical scheme adopted by the invention is that:
A kind of seawater invasion simulation test sandbox, including test sand box main body, test sand box main body middle position are provided with
The dielectric chamber of the water-bearing medias such as sandstone, soil is held, is respectively arranged at left and right sides of test sand box main body and is loaded with dyeing seawater
Seawater room, be loaded with the freshwater room of deionized water；Seawater room and freshwater room, which divide, tri- Room ABC；The room seawater C and dielectric chamber
It is separated by porous plate and the nylon wire being arranged on porous plate；The room seawater C and the intermediate room seawater A pass through with perforated steady
Liquid plate connection；Lift overflow plate is provided between the room seawater A and the room seawater B of outermost end；Seawater room upper end is provided with seawater
Water tank passes through the room cock of water drain connection seawater A of seawater water tank bottom end；Seawater room lower end is provided with seawater recycling bins, passes through sea
Two cock of water drain connection seawater recycling bins of the room water B lower end and the room seawater C lower end；The room fresh water C and test sand box middle position
Dielectric chamber separated by porous plate and the nylon wire that is arranged on porous plate；The room fresh water C is with the intermediate room fresh water A by having
The steady liquid plate connection of eyelet；Lift overflow plate is provided between the room fresh water A and the room fresh water B of outermost end；Freshwater room upper end is set
Fresh water tanks are equipped with, the room cock of water drain connection fresh water A of fresh water tanks bottom end is passed through；Freshwater room lower end is provided with fresh water recycling
Case passes through two cock of water drain connection fresh water recycling bins of the room fresh water B lower end and the room fresh water C lower end.
Technical solution of the present invention further improvement lies in that: test sand box main body use acrylic board, dielectric chamber interposition
The concave-convex section of being disconnected each other is installed, concave-convex section junction is bonded with rubber layer,；Dielectric chamber passes through concave-convex section grafting
Increase the insertion case of dielectric chamber length.
Technical solution of the present invention further improvement lies in that: the fixing clamp of the overhanging two months dentition formulas of overflow board ends, it is fixed
Folder is overlapped under lifting nut, and lifting nut spiral is connected on spiral.
Technical solution of the present invention further improvement lies in that: be provided between the room seawater A and the room seawater B by two pieces setting exist
The overflow plate guide groove of the baffle composition of overflow plate two sides, overflow plate is slightly wider than two side baffles, and the spiral setting is being overflow
Except flowing plate guide groove both ends；The room fresh water A is adjacent with two Room of room fresh water B to be closed on overflow plate side respectively and has one piece of plate washer, overflow
Plate is slightly wider than two side baffles, is provided with sealing joint strip between overflow plate and the baffle that overflow plate two sides are arranged in.
Technical solution of the present invention further improvement lies in that: insertion case two sides are provided with matched concave-convex disconnected with dielectric chamber
U-shaped outer envelope is provided on the outside of face, insertion case and dielectric chamber joint surface, outer envelope wraps between insertion case and dielectric chamber
Gap；Fixing clamp there are two downward opening inverted U-shaped structure is set on the outside of outer envelope, and two fixing clamps are arranged symmetrically in
The two sides of dielectric chamber and insertion case joint surface.
Technical solution of the present invention further improvement lies in that: the piezometer tube joint that can be discharged is arranged in the dielectric chamber back side；It is described
Piezometer tube joint is uniformly distributed into quadrate array at the entire dielectric chamber back side.
Technical solution of the present invention further improvement lies in that: the piezometer tube joint includes be provided with the dielectric chamber back side outer
Circular hole on shell wall, the organic sheet glass of bonding, the hollow stainless steel of organic glass piece center intercalation at the circular hole of medium outdoor face
Pipe, stainless steel tube inside are fixed with the gauze of enough densifications；The stainless steel tube internal screw thread of piezometer tube joint is connected with vice.
Technical solution of the present invention further improvement lies in that: insertion case side wall on be provided with packaged type piezometer tube joint；
The packaged type piezometer tube joint includes the rectangle frame hole being arranged on insertion case side wall, slides setting in the rectangle frame hole
There is the intermediate slide block mechanism for rectangle frame hole being sealed in sliding process for being equipped with tubular configured joint, slide block mechanism is included in rectangle
The area of the organic glass piece and organic glass piece back that slide in frame hole being arranged in inside insertion case is greater than rectangle frame hole
Rectangular tab.
Technical solution of the present invention further improvement lies in that: be provided on insertion case tank wall and slid laterally for rectangular tab
Rectangle frame slot；The back side for being close to insertion case is provided with a fine and close gauze equal with insertion case lateral area.
By adopting the above-described technical solution, the technological progress achieved by the present invention is:
Seawater invasion simulation test sandbox provided by the invention, water level control system include Liftable type overflow plate, are supplied water
Case and return water tank.Liftable type overflow plate can be realized by adjusting nut and be gone up and down, and when providing set height, be passed through
Water feeding tank constantly supplies water to the room A of seawater room or freshwater room, and when water level reaches the height of our needs, water body is from overflow plate
It overflows, flows to the room B, the room B is equipped with valve, is connected to return water tank so as to secondary use.The water level control system can be adjusted
SEA LEVEL VARIATION, easy to operate, convenient for the height of measurement lifting, adjustable precision is high, and adjustable range is big, can be realized adjusting water
The purpose of position.
Seawater invasion simulation test sandbox provided by the invention, Liftable type overflow plate is mainly by overflow plate, liftable spiral shell
Female, spiral and some fixing components composition；By the height of adjusting nut, the height of overflow plate can be changed indirectly；
The effect of two side baffles be play the role of limit overflow plate lateral displacement, be between overflow plate and two side baffles it is non-totally-enclosed,
But overflow plate is slightly wide with two side baffles, what be can be convenient in this way goes up and down overflow plate from outside by adjusting lifting nut, from
And play the purpose for adjusting water level elevation.
Seawater invasion simulation test sandbox provided by the invention, can be realized the function of flexible design sandbox length, according to
The specific length of the likelihood ratio and local conditions design sandbox calculated increases sand by insertion insertion case among sandbox
The length of case reduces sandbox length by removing insertion case, thus the flexibly length of control dielectric chamber simulation, to facilitate simulation
Under different range, different scale the case where seawater invasion, there is very strong adaptability and practicability.
Seawater invasion simulation test sandbox provided by the invention is embedded in the connection structure that case two sides bumps section is constituted all
With being strongly adhesive with rubber layer, section also sticking rubber layer at the connection structure that dielectric chamber middle position bumps section is constituted, with
Convenient splicing and sealing with insertion case.
Seawater invasion simulation test sandbox provided by the invention, by more between the room seawater C or the room fresh water C and dielectric chamber
Orifice plate and nylon wire separate, and nylon wire grid is fine and close, play the role of filtering, and porous plate plays the work of support to nylon wire
With.Porous plate and nylon wire, which are combined, ensure that water-bearing media can not pass through, and water body can be realized exchange.
Seawater invasion simulation test sandbox provided by the invention, piezometer tube joint can measure predetermined point after connecting pressure-measuring pipe
The pressure of position can also measure pressure and concentration under given interval and change with time situation, retouch at point to be measured
Pressure and concentration at certain point is drawn to change with time figure.
Seawater invasion simulation test sandbox provided by the invention is not only able to measure at the fixed point position being intensively orderly arranged
Concentration and pressure, be additionally provided with packaged type connector, packaged type connector is mounted on insertion tank shell, can be more freely
The concentration and pressure of any point are measured, guarantees the flexibility of measurement point position position, more easily measures the concentration of any point
And pressure.
Detailed description of the invention
Fig. 1 is seawater invasion simulation test sandbox general structure schematic diagram provided by the invention；
Fig. 2 is Liftable type overflow plate structural schematic diagram provided by the invention；
Fig. 3 is insertion box structure schematic diagram provided by the invention；
Fig. 4 is the structural schematic diagram of arrangement piezometer tube joint in the dielectric chamber back side provided by the invention；
Fig. 5 is the structural schematic diagram of piezometer tube joint and vice provided by the invention；
Fig. 6 is the structural schematic diagram of packaged type piezometer tube joint and vice provided by the invention；
Fig. 7 is the packaged type piezometer tube joint structural schematic diagram being arranged on insertion case side wall provided by the invention；
Wherein, 1, seawater water tank, 2, seawater recycling bins, 3, fresh water tanks, 4, fresh water recycling bins, 5, seawater room, 6, fresh water
Room, 7, dielectric chamber, 8, lift overflow plate, 81, overflow plate, 82, baffle, 83, fixing clamp, 84, spiral, 85, lifting spiral shell
Mother, 9, cock of water drain, 10, water-stop sheet, 11, porous plate, 12, steady liquid plate, 14, insertion case, 140, rectangle frame hole, 141, outsourcing
Shell, 142, fixing clamp, 15, piezometer tube joint, 151, stainless steel tube, 152, organic glass, 153, vice, 16, packaged type
Piezometer tube joint, 161, tubular configured joint, 162, organic glass piece, 163, rectangular tab.
Specific embodiment
The present invention is described in further details below with reference to embodiment.
As shown in Figure 1, seawater invasion simulation test sandbox general structure schematic diagram provided by the invention, provided by the invention
Seawater invasion simulation test sandbox, including test sand box main body, test sand box main body middle position, which is provided with, holds sandstone, soil
The dielectric chamber 7 of equal water-bearing medias, the test sand box main body left and right sides, which is respectively arranged with, to be loaded with the seawater room 5 of dyeing seawater, contains
Freshwater room 6 equipped with deionized water；Seawater room 5 and freshwater room 6, which divide, tri- Room ABC；The room seawater C passes through porous with dielectric chamber
Plate 11 and the nylon wire being arranged on porous plate 11 separate；May be used also between the room seawater C and the dielectric chamber 7 in test sand box middle position
To insert the water-stop sheet 10 for stopping water flow completely；The room seawater C and the intermediate room seawater A pass through with perforated steady liquid plate 12
It is logical；Lift overflow plate 8 is provided between the room seawater A and the room seawater B of outermost end；5 upper end of seawater room is provided with seawater water tank
1, pass through 9 room connection seawater A of cock of water drain of 1 bottom end of seawater water tank；5 lower end of seawater room is provided with seawater recycling bins 2, passes through sea
Two cock of water drain, the 9 connection seawater recycling bins 2 of the room water B lower end and the room seawater C lower end；The room fresh water C and test sand box interposition
The dielectric chamber 7 set is separated by porous plate 11 and the nylon wire being arranged on porous plate 11；The room fresh water C and the intermediate room fresh water A
By with perforated steady 12 connection of liquid plate；Lift overflow plate 8 is provided between the room fresh water A and the room fresh water B of outermost end；It is light
6 upper end of water chamber is provided with fresh water tanks 3, passes through 9 room connection fresh water A of cock of water drain of 3 bottom end of fresh water tanks；6 lower end of freshwater room
Fresh water recycling bins 4 are provided with, two cock of water drain, the 9 connection fresh water recycling bins 4 of the room fresh water B lower end and the room fresh water C lower end are passed through.
Test sand box main body uses acrylic board, and with a thickness of 1cm, sandbox overall dimension is long 167cm, width 10cm, height
60cm；The concave-convex section of being disconnected each other is arranged in 7 middle position of dielectric chamber, and concave-convex section junction is bonded with rubber layer,；Medium
Room 7 passes through the insertion case 14 that concave-convex section grafting increases 7 length of dielectric chamber.Concave-convex section structure bumps section structure bumps section
Structure in this programme embodiment, concave-convex section structure be each other can seamless interlocking " while " convex " section it is recessed " section
A pair of of acrylic board hard structure；.Concave-convex section structure junction strength is adhesive with rubber layer, and rubber layer is disconnected along bumps
Face is bonded, with a thickness of 0.3cm.
Porous plate between the room seawater C or the room fresh water C and dielectric chamber is the acrylic board of 1cm thickness, is drilled out among plate face
The aperture that equidistant radius is 0.25cm, upper and lower pitch of holes are 3cm, and left and right pitch of holes is 1cm；The wide 8cm of porous plate is high
59cm, with a thickness of 1cm.
Seawater room 5 and freshwater room 6 are equipped with water level control system, and the structure of the two is identical, are arranged symmetrically in Jie
7 left and right ends of matter room need to adjust the variation of sea level fluctuations and freshwater level according to test.As shown in Fig. 2, provided by the invention
Liftable type overflow plate structural schematic diagram.The fixing clamp 83 of the overhanging two months dentition formulas in 81 both ends of overflow plate, fixing clamp 83 are overlapped on
Under lifting nut 85,85 spiral of lifting nut is connected on spiral 84.Spiral 84 and liftable nut 85 are close
Fitting changes the height of overflow plate 81 by the height of adjusting nut 85 indirectly.
The overflow that the baffle 82 that 81 two sides of overflow plate are arranged in by two pieces forms is provided between the room seawater A and the room seawater B
Plate guide groove, overflow plate 81 are slightly wider than two side baffles 82, and the spiral 84 is arranged except overflow plate guide groove both ends；It is light
Respectively there is one piece of plate washer 82 in the room water A close on overflow plate 81 side adjacent with two Room of room fresh water B, and overflow plate omits 81 and is wider than two side baffles
82.Sealing joint strip is provided between overflow plate 81 and the baffle 82 that 81 two sides of overflow plate are set.
Specifically, the water level control system includes Liftable type overflow plate 8, fresh water water by taking 5 one end of freshwater room as an example
Case 3 and fresh water recycling bins 4.Overflow plate 81 can realize lifting by adjusting lifting nut 85, when providing set height,
Constantly supplied water by fresh water tanks 4 to the room fresh water A of freshwater room 5, when water level reach we needs height when, water body from overflow
Flowing plate 81 is overflowed, and the room fresh water B is flowed to, and the room fresh water B is equipped with valve, is connected to fresh water recycling bins 4 so as to secondary use.The room fresh water A
With the room fresh water C by 12 connection of stabilier, stabilier 12 is a length of a film 60cm, wide 8cm, the thin plate of thick 0.5cm, if it is intermediate with
Dry hole eye, eyelet hole eye are distributed as equidistantly distributed.It is divided among the room fresh water C and dielectric chamber 7 by porous plate 11 and nylon wire,
Moisture can pass through, and water-bearing media can not pass through, to realize the water body exchange of freshwater room 5 and dielectric chamber 7.Liftable type overflows
Flowing plate 8 is mainly made of overflow plate 81, lifting nut 85, spiral 84 and some fixing components；81 plate of overflow plate is high
30cm, wide 12cm, thick 1cm, the fixing clamp 83 of the overhanging two months dentition formulas in overflow plate two sides, fixing clamp 82 are contained in lifting nut 85
On, the internal diameter 2cm of lifting nut 85, outer diameter 4cm, screw pitch 2mm, 85 sets of lifting nut tie up on spiral 84, screw-thread steel
Muscle 84 major diameter 2cm, path 1.84cm, spiral 84 and the close fitting of lifting nut 85 pass through the height for adjusting lifting nut 85
Degree, can change the height of overflow plate 81 indirectly；Liftable type overflow plate 8 be it is close it is clamping the room fresh water A and the room fresh water B it
Between, respectively there are one piece of high 29cm, wide 8cm plate washer 82 in the room fresh water A and the room fresh water B two sides, and the effect of two side baffles 82 is to play limitation
The effect of 81 lateral displacement of overflow plate is non-totally-enclosed between overflow plate 81 and two side baffles 82, but overflow plate 81 is slightly wider than
Two side baffles 82, what be can be convenient in this way goes up and down overflow plate 81 from outside by adjusting lifting nut 85, to play adjusting
The purpose of water level elevation.Overflow plate 81, which is adjusted downwards, reduces water level elevation, is just retracted during adjusting downwards into two side blocks
In the gap of plate 82, the high 29cm of baffle, overflow plate high 30cm when overflow plate 81 is fully retracted in the gap of baffle 82, are adjusted
Height of water level be 30cm, and when overflow plate 81 is stretched out from two side baffles, baffle 82 is not departed from order to play, so that baffle 82
The effect of the lateral displacement of overflow plate 81 is limited, overflow plate 81 is provided with the pre- of 3cm when stretching out two 82 maximum positions of side baffle
It stays, therefore the highest length of the extended baffle 82 of overflow plate 81 is 29-3=26cm, then overflow plate 81 adjusts the highest height of water level
Degree is 30+29-3=56cm, therefore the range of liftable valve regulated height of water level is 26cm to 56cm, this has been fully able to
Meet the needs of seawater invasion simulation test.
In order to control the length of the simulation of dielectric chamber 7, increases the length of sandbox by insertion insertion case 14 among sandbox, lead to
It crosses and removes insertion case 14 to reduce sandbox length.Case 14 is embedded in connect among dielectric chamber 7 by the concave-convex section structure of two sides
Concave-convex section structure is intercalated into 7 middle position of dielectric chamber；Outer envelope 141 and fixing clamp 142 are additionally provided on the outside of insertion case 14；Outside
Involucrum 141 wraps mutually to be connected between the concave-convex section structure of insertion 14 two sides of case and the concave-convex section structure among dielectric chamber 7
The gap connect；Setting at the gap bilateral symmetry of the interconnection is corresponded on the outside of outer envelope 141, and there are two fixing clamps 142.
As shown in figure 3, the structural schematic diagram of insertion case provided by the invention, insertion 14 two sides of case are provided with and dielectric chamber 7
Matched bumps section, is embedded on the outside of case 14 and 7 joint surface of dielectric chamber and is provided with U-shaped outer envelope 141, outer envelope 141 wraps
Wrap the gap between insertion case 14 and dielectric chamber 7；There are two downward opening inverted U-shaped structures for setting on the outside of outer envelope 141
Fixing clamp 142, two fixing clamps 142 be arranged symmetrically in dielectric chamber 7 and be embedded in 14 joint surface of case two sides.
Specifically, insertion 14 side view of case is U-shaped, the size of insertion case 14 can be preset as needed, in skill of the present invention
In the embodiment that art scheme provides, insertion case 14 is long 50cm, wide 10cm, high 60cm, and acrylic plate thickness is 1cm；It is embedded in case 14
The concave-convex section structure junction strength of two side sections is adhesive with rubber layer, with a thickness of 0.3cm；Test sand box bulk media room
Rubber layer on two sections in 7 middle positions also uses strength gluing, and thickness is also 0.3cm, to facilitate and be embedded in the splicing of case
And hermetic seal.Insertion case 14 is connected in bulk media room 7 by concave-convex section structure, is also set up on the outside of concave-convex section structure
There are outer envelope 141 and fixing clamp 142: insertion case 14 is first inserted into the centre of dielectric chamber 7, so that insertion case two sides bumps are disconnected
The rubber layer of face structure is docked with the rubber layer of place's bumps section structure of 7 section of dielectric chamber；It is wrapped again with outer envelope 141 embedding
The concave-convex section structure of 7 junction of cartonning 14 and dielectric chamber；Finally position installs two at concave-convex section structure bilateral symmetry
On the one hand fixing clamp 142 plays fixed outer envelope 141 and insertion case 14, prevents leak；On the other hand, fixing clamp 142 plays
The lateral stiffness of increase dielectric chamber 7 and bending resistance and stability against overturning prevent sandbox because sand loading water swelling and generation are lateral
Deformation.It, can be using in dielectric chamber according to different similar proportion Selection experiment length in order to meet the flexibility of model test
It is inserted into several 50cm wide among 7 and is embedded in 14 component of case, flexibly to meet the requirement of test length under different similar proportions, therefore
The overall length of this test sand box is 183+n × 50cm, and n is the number of insertion insertion 14 component of case.
Further, the piezometer tube joint 15 that can be discharged is arranged in 7 back side of dielectric chamber；The piezometer tube joint 15 is entirely being situated between
7 back side of matter room is uniformly distributed into quadrate array.In the embodiment provided by technical solution of the present invention, piezometer tube joint 15 divides
Cloth is in the square profile of 10cm × 10cm, is all distributed at entire 7 back side tank wall of dielectric chamber, the highest distribution height of connector is
50cm.The structural schematic diagram of specific distribution profile and integral arrangement dielectric chamber back side arrangement piezometer tube joint shown in Figure 4,
50 piezometer tube joints 15 are arranged at 7 back side tank wall of dielectric chamber.The piezometer tube joint 15 being distributed at 7 back side tank wall of dielectric chamber
It is set in advance at 7 back side of dielectric chamber, position can not change.
Further, the piezometer tube joint 15 includes the circular hole being provided on the shell wall at 7 back side of dielectric chamber, dielectric chamber
Organic sheet glass 152, the hollow stainless steel tube 151 of the central intercalation of organic glass piece 152, stainless steel are bonded at the circular hole of 7 outer surfaces
The gauze of enough densifications is fixed on the inside of pipe 151.151 internal screw thread of stainless steel tube of piezometer tube joint 15 is connected with vice 153.
As shown in figure 5, the structural schematic diagram of piezometer tube joint provided by the invention and vice.Piezometer tube joint 15 is set
Setting is the circular hole for opening a 1.2cm diameter at 7 back side tank wall of dielectric chamber in advance, with 3cm × 3cm × 1cm organic glass piece
152 cover circular hole, and internal diameter 1cm, hollow stainless steel tube 151 or the hard modeling of outer diameter 1.2cm, long 3cm are inlayed in 152 center of sheet glass
Expects pipe, so that 151 intercalation of stainless steel tube is in organic glass piece 152；Organic glass piece 152 is bonded in 7 back appearance of dielectric chamber
Face plays the role of being connected and fixed and protecting stainless steel tube 151；The inside of piezometer tube joint 15 is fixed with gauze, and gauze is enough
Densification can play the role of filtering quartz sand, and quartz sand is prevented to flow out.Liquid in this way in dielectric chamber 7 can be from pressure-measuring pipe
Connector 15 flows out, and quartz sand can not be flowed out from piezometer tube joint 15, is measured with facilitating.
Further, piezometer tube joint 15 further includes vice 153.The vice 153 is flat with spiral thread
Head fastener, just can be 151 in the stainless steel tube of precession piezometer tube joint 15；It include spiral thread, Neng Gougu in stainless steel tube 151
The fixed vice 153 firmly screwed in.Precession and back-out of the vice 153 in stainless steel tube 151, determine piezometer tube joint 15
Closure with it is open-minded.
Further, as shown in fig. 6, the structural representation of packaged type piezometer tube joint provided by the invention and vice
Figure: packaged type piezometer tube joint 16 is provided on insertion 14 side wall of case；The packaged type piezometer tube joint 16 includes setting
Rectangle frame hole 140 on insertion 14 side wall of case, the interior sliding in the rectangle frame hole 140 are provided with centre and are equipped with tubular configured joint
161 slide block mechanism for sealing rectangle frame hole 140 in sliding process, slide block mechanism include having of sliding in rectangle frame hole
The area being arranged in inside insertion case 14 at 162 back of machine sheet glass 162 and organic glass piece is greater than the rectangle in rectangle frame hole 140
Thin slice 163.The piezometer tube joint of 163 centre of rectangle frame hole 140, rectangular tab 163 and rectangular tab is combined
Packaged type piezometer tube joint 16.The rectangle frame slot slid laterally for rectangular tab 163 is provided on insertion 14 tank wall of case；It is close to
The back side of insertion case 14 is provided with a fine and close gauze equal with insertion case lateral area.
As shown in fig. 7, the packaged type piezometer tube joint structural schematic diagram being arranged on insertion case side wall provided by the invention,
5 row's packaged type piezometer tube joints 16 are disposed on insertion 14 side wall of case.The packaged type piezometer tube joint 16 is will to survey
Pressure pipe joint is placed in 163 centre of rectangular tab, and rectangular tab 163 is embedded on the inside of insertion 14 tank wall of case, and outside is
It is slightly less than the rectangle frame hole 140 of rectangular tab 163, the long 16cm in frame hole, high 3cm enable packaged type piezometer tube joint 16
It is moved in rectangle frame hole 140.
Specifically, rectangular tab 163 can just cover rectangle frame hole 140, water-resisting property is realized；The thickness of rectangular tab 163
It for 0.5cm, is embedded in the tank wall of insertion case 14, it is therefore prevented that seepage flow motion state of 163 evagination of rectangular tab to insertion case 14
It impacts；A length of 33cm of rectangular tab 163, a height of 7cm, the center of rectangular tab 163 are equipped with packaged type pressure-measuring pipe
The size of connector 16, packaged type piezometer tube joint 16 is identical as the piezometer tube joint 15 at insertion 14 back side tank wall of case, described
The 163 width 3cm of rectangular tab of packaged type piezometer tube joint 16, and rectangular tab 163 is in the piezometer tube joint of central location
The brachium of the left and right sides is 15cm；A long 46cm is cut out on insertion 14 tank wall of case, the rectangle frame hole 140 of high 7cm ensure that
Rectangular tab 163 is sufficiently slided in insertion 14 side wall of case；When rectangular tab 163 is in the rectangle frame hole 140 in insertion case 14
When sliding, the movement of packaged type piezometer tube joint 16 is driven.The tubular configured joint 161 of outer lug is pinned, it can be achieved that moving left and right；
When the tubular configured joint 161 of packaged type piezometer tube joint 16 moves to one end, another end wall of rectangular tab 163 can be complete at this time
Rectangle frame hole 140 is covered entirely, has the function that sealing.
A high 60cm is fixed on the inside of the back side of insertion case 14, the fine and close gauze of long 50cm can prevent packaged type
Quartz sand flows out connector when piezometer tube joint 16 is mobile, plays a role in filtering, it is often more important that when we are in mobile tubular configured joint
When 161, quartz sand can be completely cut off, prevent quartz sand from entering in the gap of packaged type piezometer tube joint 16, while also can be reduced
When moving to the disturbance of quartz sand layer.Packaged type piezometer tube joint 16 is due to construction itself, when moving inevitably
Water-bearing media layer can be caused to disturb, therefore the arrangement of piezometer tube joint connects to be fixed on pressure-measuring pipe at 7 back side tank wall of dielectric chamber
Based on first 15.
When actually measuring pressure and salt concentration, it would be desirable to the first piezometer tube joint 15 or removable of point clearly to be measured
Dynamic formula piezometer tube joint 16；Specifically by taking piezometer tube joint 15 at 7 back side tank wall of dielectric chamber as an example, in order to guarantee measured pressure-measuring pipe
Connectivity and measurement precision, it is ensured that piezometer tube joint 15 is open-minded at point to be measured, remaining piezometer tube joint 15 is in
Sealing state prevents its water outlet, infiltration, the interference to test.At point to be measured, measure under given interval pressure and
Concentration changes with time situation, can depict pressure and concentration at certain point and change with time figure.
The pressure of predetermined point can be measured after the connection pressure-measuring pipe of piezometer tube joint 15.Specifically, piezometer tube joint 15 with
The connection of pressure-measuring pipe is managed by PV, caliber 1.2cm, can be just to upper piezometer tube joint 15, after connecting pressure-measuring pipe, we are only
Read pressure gauge reading on pressure-measuring pipe can the place of measurement give pressure at point.
Salt concentration can also be measured at piezometer tube joint 15.Specifically, first finding the position of predetermined point, the position is opened
Set the vice 153 of connector；It is a little by the solution in imbibition instrument (such as rubber head dropper) aspiration connection again；By the solution of sucking
It releases, instills glass slide；Glass slide is put into salinometer again, utilizes salinity instrument in-site measurement salt concentration.
Seawater invasion simulation test sandbox provided by the invention, can according to need, and carry out analog constant fresh water head and non-
The situation of constant fresh water head.The setting method of constant fresh water head is to adjust overflow plate height to predetermined position, from the room fresh water A
Upside is slowly dropped into fresh water, and water flow there was not overflow plate, flows to the room fresh water B, and such fresh water is continuously flowed from fresh water tanks
It is flowed into again into the room fresh water A out, guaranteeing freshwater room head always is in constant state.The setting side of non-constant fresh water head
Rule is discharged water in advance until when adjusting overflow plate to specified altitude assignment, until then stopping discharges water after water level did not had overflow plate, from
And have the function that the non-constant fresh water head of simulation.
Further, the embodiment of the present invention provides a kind of examination for seawater invasion simulation test sandbox provided by the invention
Test application method.It is specific as follows:
A. quartz sand is filled.Ready purity quartzite is uniformly put into the medium of seawater invasion simulation test sandbox
Room is compacted when putting with plate, and densification as far as possible is close to field actually aqueous layer state.The embodiment of the present invention is that simulation is single
Phreatic aquifer, sand layer thickness are set to 50cm.
B. it is put into fresh water to dielectric chamber on one side, measures the osmotic coefficient k of dielectric chamber water-bearing media on one sidex.First use freshwater room
Side water-stop sheet covers porous plate and nylon wire, adjusts overflow plate height, injects fresh water to freshwater room by fresh water tanks, will be light
Water height of water level is adjusted to h1, the water-stop sheet of freshwater room side is taken away, while ensuring in seawater room without other liquid and for closed-loop
Then the water-stop sheet of seawater room side is removed in border, fresh water tanks use small flow water injection mode instead, adjusts injection flow to guarantee water
Position is h1, fresh water seepage flow situation is observed, fresh water seepage direction enters in sea level fluctuations control room.When seawater room side, pressure-measuring pipe goes out
Start timing when existing head or when sea level fluctuations control room is covered by water membrane, records the Δ V after the Δ t time
(increasing fresh water volume), calculates discharge per unit width q.
B is dielectric chamber width in formula, is 10cm, records left and right end pressure-measuring pipe height at this time and respectively, and left end reads h2,
Right end reads h1, according to Dupuit's equation, ignore the vertical component velocity of seepage flow, have
Above-mentioned two formula of simultaneous, can obtain
In formula, kxFor horizontal direction water-bearing media infiltration coefficient；L is the distance between two pressure-measuring pipes；B is sandbox width, is
10cm；Δ V is increased water body volume；Δ t is the time used；h1For right end pressure-measuring pipe reading；h2For left end pressure-measuring pipe reading.
According to different Δ V volumes is obtained under the different Δ t time, h is brought into1And h2Value, can be obtained several groups of kxValue can use
Draw valueFor more accurate infiltration coefficient.But the injecting process is irreversible procedure, is completed during primary water filling to infiltration
The calculating of saturating coefficient.When the fresh water level in seawater room reaches predetermined altitude, terminate numeration, completes second step operation.
C. prefabricated dyeing seawater is injected.It needs to close fresh water seepage flow with the water-stop sheet of freshwater room side before this logical
Road, and the fresh water in seawater room is discharged, seawater room is wiped as far as possible with dry towel, guarantees not cause the injection of next seawater
It influences.To achieve the purpose that water-stop sheet perfection obstructs seawater and fresh water, can be wrapped up on the periphery of water-stop sheet with rubber layer, and use
Cross-brace equipment supports water-stop sheet, to arrive the purpose of complete water proof.Adjust overflow plate height, live into coloring seawater to make a reservation for
Highly, it uses small flow injection coloring seawater instead and guarantees that sea level fluctuations are constant, seawater and freshwater is only obstructed by water-stop sheet at this time.
D. the water-stop sheet for opening seawater room side starts seawater invasion test.Initial time is recorded, starts timing, often
The specific location of invasion degree of saltiness boundary line is marked in main tank body front with marking pen every 15min, and is recorded with camera shooting
Pattern is invaded, and determines the position for the piezometer tube joint that one will measure pressure and salt concentration, and complete each of marked
Primary record is completed in the measurement of pressure and salt concentration at piezometer tube joint at this time；It shoots, mark, measure and remembers every 15min
Record once uses after 120min and shoots, marks every 30min, measuring and recording once until 270min terminates.
E. it completes after recording and putting test data in order, carries out round-off work.Fresh water tanks and seawater water tank are first closed, is made
Separate porous plate and nylon wire with two sides water-stop sheet, opens the cock of water drain in seawater room and freshwater room, seawater and fresh water are led
Enter seawater recycling bins and fresh water recycling bins, to recycle；The intermediate attachment member of dielectric chamber is opened, from centre, taking-up contains
The quartz sand of water, is rinsed and is dried with running water, is prepared for test next time.
Obviously, the above embodiments are merely examples for clarifying the description, and does not limit the embodiments.It is right
For those of ordinary skill in the art, can also make on the basis of the above description it is other it is various forms of variation or
It changes.There is no necessity and possibility to exhaust all the enbodiments.And it is extended from this it is obvious variation or
It changes still within the protection scope of the invention.
Claims (9)
1. a kind of seawater invasion simulation test sandbox, including test sand box main body, test sand box main body middle position is provided with Sheng
The dielectric chamber (7) of the water-bearing medias such as sandstone, soil is put, is respectively arranged at left and right sides of test sand box main body and is loaded with dyeing seawater
Seawater room (5), be loaded with the freshwater room (6) of deionized water；It is characterized in that, seawater room (5) are divided with freshwater room (6) to be had
Tri- Room ABC；The room seawater C is separated with dielectric chamber by porous plate (11) and the nylon wire being arranged on porous plate (11)；The room seawater C
Pass through with the intermediate room seawater A with perforated steady liquid plate (12) connection；It is arranged between the room seawater A and the room seawater B of outermost end
There are lift overflow plate (8)；Seawater room (5) upper end is provided with seawater water tank (1), is discharged water out by seawater water tank (1) bottom end
Close the room (9) connection seawater A；Seawater room (5) lower end is provided with seawater recycling bins (2), by under the room seawater B lower end and the room seawater C
Two cock of water drain (9) connection seawater recycling bins (2) at end；The room fresh water C and the dielectric chamber (7) in test sand box middle position pass through
Porous plate (11) and the nylon wire being arranged on porous plate (11) separate；The room fresh water C and the intermediate room fresh water A pass through band perforation
Steady liquid plate (12) connection；Lift overflow plate (8) are provided between the room fresh water A and the room fresh water B of outermost end；Freshwater room (6)
Upper end is provided with fresh water tanks (3), passes through the room cock of water drain (9) connection fresh water A of fresh water tanks (3) bottom end；Under freshwater room (6)
End is provided with fresh water recycling bins (4), is returned by two cock of water drain (9) connection fresh water of the room fresh water B lower end and the room fresh water C lower end
It receives case (4).
2. a kind of seawater invasion simulation test sandbox according to claim 1, it is characterised in that: test sand box main body uses
The concave-convex section of being disconnected each other is arranged in acrylic board, dielectric chamber (7) middle position, and concave-convex section junction is bonded with rubber
Layer, dielectric chamber (7) pass through the insertion case (14) that concave-convex section grafting increases dielectric chamber (7) length.
3. a kind of seawater invasion simulation test sandbox according to claim 1, it is characterised in that: outside overflow plate (81) both ends
The fixing clamp (83) of two months dentition formulas is stretched, fixing clamp (83) is overlapped under lifting nut (85), and lifting nut (85) spiral connects
It connects on spiral (84).
4. a kind of seawater invasion simulation test sandbox according to claim 3, it is characterised in that: the room seawater A and the room seawater B
Between be provided with the overflow plate guide groove that baffle (82) in overflow plate (81) two sides form, overflow plate (81) summary be set by two pieces
It is wider than two side baffles (82), the spiral (84) is arranged except overflow plate guide groove both ends；The room fresh water A and the room fresh water B
Respectively there is one piece of plate washer (82) in adjacent overflow plate (81) side of closing in two Room, and overflow plate omits (81) and is wider than two side baffles (82), overflows
Flowing plate (81) and setting are provided with sealing joint strip between the baffle (82) of overflow plate (81) two sides.
5. a kind of seawater invasion simulation test sandbox according to claim 2, it is characterised in that: insertion case (14) two sides are set
Be equipped with dielectric chamber (7) matched concave-convex section, be provided on the outside of insertion case (14) and dielectric chamber (7) joint surface U-shaped outer
Involucrum (141), outer envelope (141) wrap the gap between insertion case (14) and dielectric chamber (7)；On the outside of outer envelope (141)
Fixing clamp (142) there are two downward opening inverted U-shaped structure is set, and two fixing clamps (142) are arranged symmetrically in dielectric chamber (7)
With the two sides on insertion case (14) joint surface.
6. a kind of seawater invasion simulation test sandbox according to claim 1, it is characterised in that: dielectric chamber (7) back side is set
Set the piezometer tube joint (15) that can be discharged；The piezometer tube joint (15) is uniformly distributed into pros at entire dielectric chamber (7) back side
Shape array.
7. a kind of seawater invasion simulation test sandbox according to claim 6, it is characterised in that: the piezometer tube joint
It (15) include the circular hole being provided on the shell wall at dielectric chamber (7) back side, the organic glass of bonding at the circular hole of dielectric chamber (7) outer surface
Glass piece (152), organic glass piece (152) the center hollow stainless steel tube of intercalation (151), stainless steel tube (151) inside are fixed with foot
Enough fine and close gauzes；Stainless steel tube (151) internal screw thread of piezometer tube joint (15) is connected with vice (153).
8. a kind of seawater invasion simulation test sandbox according to claim 5, it is characterised in that: on insertion case (14) side wall
It is provided with packaged type piezometer tube joint (16)；The packaged type piezometer tube joint (16) includes setting in insertion case (14) side
Rectangle frame hole (140) on wall, in the rectangle frame hole (140) sliding be provided with centre be equipped with tubular configured joint (161)
The slide block mechanism for sealing rectangle frame hole (140) in sliding process, slide block mechanism includes the organic glass slided in rectangle frame hole
The setting at glass piece (162) and organic glass piece (162) back is greater than rectangle frame hole (140) in the internal area of insertion case (14)
Rectangular tab (163).
9. a kind of seawater invasion simulation test sandbox according to claim 8, it is characterised in that: on insertion case (14) tank wall
It is provided with the rectangle frame slot slid laterally for rectangular tab (163)；The back side for being close to insertion case (14) is provided with one and insertion
The equal fine and close gauze of case lateral area.
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| CN112067793B (en) * | 2020-09-22 | 2022-11-11 | 山东科技大学 | Experimental device and method for simulating stratum subsidence rule in coastal mining |
| CN114814164A (en) * | 2022-04-06 | 2022-07-29 | 河海大学 | Device and method for simulating upstream invasion of coastal aquifer by seawater along river channel |
| CN114814164B (en) * | 2022-04-06 | 2023-03-14 | 河海大学 | Device and method for simulating upstream invasion of seawater into coastal aquifer along riverway |
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