CN105716958B - Simulate the foundation model experimental rig of artesian head lifting - Google Patents
Simulate the foundation model experimental rig of artesian head lifting Download PDFInfo
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- CN105716958B CN105716958B CN201610205933.3A CN201610205933A CN105716958B CN 105716958 B CN105716958 B CN 105716958B CN 201610205933 A CN201610205933 A CN 201610205933A CN 105716958 B CN105716958 B CN 105716958B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 102
- 239000002689 soil Substances 0.000 claims abstract description 90
- 239000011148 porous material Substances 0.000 claims abstract description 20
- 238000012360 testing method Methods 0.000 claims abstract description 20
- 230000035515 penetration Effects 0.000 claims abstract description 14
- 230000001105 regulatory effect Effects 0.000 claims abstract description 14
- 238000004088 simulation Methods 0.000 claims abstract description 13
- 241000272165 Charadriidae Species 0.000 claims abstract description 11
- 238000005259 measurement Methods 0.000 claims abstract description 10
- 238000002474 experimental method Methods 0.000 claims description 28
- 239000011521 glass Substances 0.000 claims description 18
- 239000004677 Nylon Substances 0.000 claims description 15
- 229920001778 nylon Polymers 0.000 claims description 15
- 229920003229 poly(methyl methacrylate) Polymers 0.000 claims description 13
- 239000004926 polymethyl methacrylate Substances 0.000 claims description 13
- 229910001220 stainless steel Inorganic materials 0.000 claims description 13
- 239000010935 stainless steel Substances 0.000 claims description 13
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 12
- VVQNEPGJFQJSBK-UHFFFAOYSA-N Methyl methacrylate Chemical compound COC(=O)C(C)=C VVQNEPGJFQJSBK-UHFFFAOYSA-N 0.000 claims description 11
- 229920005372 Plexiglas® Polymers 0.000 claims description 11
- 239000004576 sand Substances 0.000 claims description 8
- 229920006395 saturated elastomer Polymers 0.000 claims description 8
- 239000004746 geotextile Substances 0.000 claims description 7
- 238000009434 installation Methods 0.000 claims description 6
- 229910052757 nitrogen Inorganic materials 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 5
- 229910000831 Steel Inorganic materials 0.000 claims description 4
- 239000010959 steel Substances 0.000 claims description 4
- 239000004568 cement Substances 0.000 claims description 3
- 239000004927 clay Substances 0.000 claims description 3
- 238000000465 moulding Methods 0.000 claims description 2
- 230000003993 interaction Effects 0.000 abstract description 7
- 238000004458 analytical method Methods 0.000 abstract description 4
- 238000011161 development Methods 0.000 abstract description 2
- 230000001276 controlling effect Effects 0.000 abstract 1
- 238000000034 method Methods 0.000 description 7
- 239000002245 particle Substances 0.000 description 6
- 230000008859 change Effects 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 238000009412 basement excavation Methods 0.000 description 2
- 210000000476 body water Anatomy 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000001687 destabilization Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 238000010191 image analysis Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
- G01N3/10—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces generated by pneumatic or hydraulic pressure
- G01N3/12—Pressure testing
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0058—Kind of property studied
- G01N2203/0069—Fatigue, creep, strain-stress relations or elastic constants
- G01N2203/0075—Strain-stress relations or elastic constants
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/026—Specifications of the specimen
- G01N2203/0284—Bulk material, e.g. powders
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- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a kind of foundation model experimental rigs of simulation artesian head lifting.Including model casing, pressure-bearing Stilt layer, artesian head regulating system, sensor fastening device and measurement system；Pressure-bearing Stilt layer is arranged in model casing bottom；Pressure-bearing Stilt layer is connect with artesian head regulating system, by adjusting the mariotte flask of artesian head regulating system come the lifting of artesian head in Controlling model case；Measurement system includes miniature pore water pressure sensor, miniature soil pressure cell, multi-Channels Data Acquisition and digital camera；The interaction when present invention can simulate artesian head lifting between bearing course and the weak water penetration foundation soil body of overlying；Measure the Water And Earth Pressures of ground and deformation under different artesian heads, the problems such as arranging correlation test data and determining ground stress and development of deformation rule, ground Study on Problems caused by being lifted for artesian water provides effective test data and supports, and provides foundation for theoretical analysis model later.
Description
Technical field
The present invention relates to a kind of foundation model experimental rigs, more particularly to the foundation model under artesian head jacking conditions
Experimental rig, interaction when can be used for simulating artesian head lifting between bearing course and the weak water penetration foundation soil body of overlying,
Study Water And Earth Pressures response and the problem on deformation of ground under different artesian heads.
Background technology
In strand, riparian area, not only rich groundwater, the alternating layers between foundation soil Chang Chengqiang, aquiclude are distributed, work
Often face the case where Deep Foundation Pit bottom aquiclude or less still has bearing course in journey, foundation pit deformation caused by artesian water effect and
Destabilization problems are one of the material risk sources of such regional deep-foundation pit engineering.The central area of large-scale excavation can be simplified
For foundation model, hole bottom is weak caused by can disclosing the artesian head variation in the region by designing the method for foundation model experiment
Pervious bed water and soil responds and deformation rule.
Research compared to economics analysis method and finite element numerical method uses set soil constitutive model, calculates
Soil body Water And Earth Pressures and deformation size caused by the artesian head variation arrived have prodigious dependence to the selection of calculating parameter；
It is more difficult in Practical Project the Water And Earth Pressures at Foundation Pit bottom (being located in excavation of foundation pit region) are monitored in real time, carry out a large amount of phases
As engineering monitoring data statistic analysis with obtain artesian head variation caused by hole bottom aquiclude deformation rule method
It also is difficult to realize；In view of geotechnical model test under Chang Chongli, Soil Microstructure, phase between soil particle size and soil particle are not influenced
Interaction relationship is consistent with actual conditions, can objectively respond artesian water and cheat the interaction between the aquiclude soil particle of bottom,
It is widely used in considering the microexamination of resistance to shear of soil strain stress relation.The related geotechnical model test of traditional artesian water effect is ground
Study carefully, does not consider that gas enters unsaturated soil problem caused by experiment soil body possibility in water.
Invention content
In order to overcome the above-mentioned deficiencies of the prior art, the present invention provides the foundation model experiments of simulation artesian head lifting
Device solves the problem of modelling that artesian head lifts in experiment, and bearing course and overlying are weak when can simulate artesian head lifting
Interaction between aqueous foundation soil body measures the Water And Earth Pressures of ground and deformation under different artesian heads, arranges related examination
The problems such as testing data and determining the stress and development of deformation rule of the lower ground of artesian head lifting, for ground caused by artesian water lifting
Base Study on Problems provides effective test data and supports, and theoretical analysis model provides foundation for after.
The technical solution adopted by the present invention to solve the technical problems is：A kind of foundation model of simulation artesian head lifting
Experimental rig, including model casing, pressure-bearing Stilt layer, artesian head regulating system, sensor fastening device and measurement system five
Part；The model casing is by that all around and five pieces of bottom organic glass forms, can facilitate the deformation of the soil body in observation experiment；
The top of two sides of described model casing or so is respectively mounted flowing water Valve, and flowing water Valve bottom flushes with experiment soil body top surface, tries
Flowing water Valve stays open to drain in time during testing so that the water level line for testing the soil body is kept constant；The model casing
Bottom side the first water flowing valve is installed for being saturated the soil body, the second water flowing valve is installed for being connected to artesian head in the other side
Regulating system；The pressure-bearing Stilt layer is made of the poly (methyl methacrylate) plate with limbers, organic glass short column and anti-filter geotextile；
Organic glass short column is fixed in the poly (methyl methacrylate) plate bottom with limbers, is positioned in model casing, and with four of model casing
Side is tightly connected；The poly (methyl methacrylate) plate surface mount anti-filter geotextile with limbers, prevents artesian head from changing
The loss of the soil body is tested in journey；The artesian head regulating system is made of hydraulic gage, holder and mariotte flask；The hydraulic pressure
Meter passes through three-way pipe link model case and mariotte flask；Fixed pulley is installed on the top of the holder, and steel wire rope one end connects hand
Device is shaken, the other end connects mariotte flask around fixed pulley, and the lift adjustment artesian water of mariotte flask is controlled by hand-operated device
The size of head；The mariotte flask is by plexiglass cylinder, air intake valve, third water flowing valve, outlet valve and air bag group
At；Outlet valve is arranged in the plexiglass cylinder bottom setting air intake valve and third water flowing valve, top；The intake valve
Door is connect with air bag；The sensor fastening device is made of stainless steel stent, nylon sheet and bolt；The sensor fixes dress
It sets on the trailing flank being bolted in model casing；The nylon sheet is fixed on stainless steel stent, stainless steel stent and
It is provided with the circular hole of the perforative miniature pore water pressure sensor of installation in nylon sheet, the miniature soil pressure cell of installation is provided in nylon sheet
Circular hole, metallic channel is provided on stainless steel stent and nylon sheet for placing miniature pore water pressure sensor and miniature soil pressure
The signal transmssion line of box；The measurement system includes that miniature pore water pressure sensor, miniature soil pressure cell, multi-channel data are adopted
Collect instrument and digital camera；The miniature pore water pressure sensor is connected with miniature soil pressure cell by signal transmssion line mostly logical
Track data Acquisition Instrument；The digital camera is positioned over immediately ahead of model casing.
Further, the nitrogen of 1atm is housed in the air bag.
Further, the plexiglass cylinder is built-in air free water.
Further, the bottom experiment soil body in model casing is gravelly sand, to simulate pressure-bearing soil layer；It is weak that overlying, which tests the soil body,
The water penetration soil body, is saturated using air free water.
Further, the weak water penetration soil body is clay silt.
Further, the digital camera answers exclusive PCR, position that can not move during the test；It can root
It needs to add light source according to shooting.
Further, the position of the sensor fastening device can be adjusted according to the needs of experiment, and quantity can root
It needs to increase according to experiment；Sensor fastening device should be mounted on the model casing side for not influencing digital camera shooting.
Further, four sides of the poly (methyl methacrylate) plate with limbers and model casing are sealed by glass cement and are connected
It connects.
Further, the hand-operated device has self-locking function.
Compared with prior art, the beneficial effects of the invention are as follows：
1, the method for providing pressure-bearing gravel layer artesian head pressure using pressure-bearing Stilt layer in the present invention, with natural artesian water
Mode of occurence it is close；Pressure-bearing gravel layer is in direct contact with the weak water penetration soil layer of overlying by objective simulation artesian head lifting process
Interaction between middle bearing course and the weak water penetration soil layer of overlying is conducive to ground caused by further disclosing artesian head lifting
Base soil body Water And Earth Pressures respond and foundation soil body deformation rule；Experimental study is carried out under normal gravity condition, does not influence foundation soil body
Microstructure so that interaction relationship is consistent with actual conditions between soil particle size and soil particle, be conducive to carry out be related to
The microexamination to interact between soil particle.
2, the present invention uses the air free water saturation testing soil body before the test, is provided during experiment and presses water environment without air bearing,
So that the hole of the experiment soil body is full of air free water, as above operation has 2 benefits：First, underwater bubble is avoided to enter weak water penetration
Soil layer causes the unsaturation problem of the soil body, and (compared with saturated soil, there are larger differences and uncertain for the mechanical characteristic of unsaturated soil
Property)；Second is that avoiding underwater bubble that miniature pore water pressure sensor is interfered to influence its measurement accuracy.
3, the present invention uses improved mariotte flask, passes through the gas inside and outside the nitrogen balance mariotte flask in air bag
Pressure, the characteristic of water is insoluble in using nitrogen, is built for the experiment soil body and is pressed water environment without air bearing, effectively avoids conventional Marriot
Soil body unsaturated soil problem caused by bubble soluble in water when bottle supplies water；Marriot is fixed using the self-locking function of hand-operated device
The height of bottle ensures to provide stable artesian head pressure；Hydraulic gage link model case and artesian head regulating system, can be accurate
Read the size of the artesian head pressure applied.
4, the present invention fixes miniature pore water pressure sensor, miniature soil pressure cell using sensor fastening device, effectively
Soil deformation leads to sensor measurement change in location and influences measuring accuracy during avoiding experiment.
Description of the drawings
Fig. 1 is the foundation model experimental rig side view for simulating artesian head lifting.
Fig. 2 is the model casing vertical view before banketing.
Fig. 3 is that pressure-bearing makes somebody a mere figurehead schematic diagram of a layer structure.
Fig. 4 (a) is sensor fastening device side view.
Fig. 4 (b) is sensor fastening device vertical view.
Fig. 4 (c) is sensor fastening device sectional view.
In figure：Model casing 1；Pressure-bearing Stilt layer 2；Poly (methyl methacrylate) plate 2-1 with limbers；Organic glass short column 2-2；Anti-filter
Geotextile 2-3；Flowing water Valve 3；First water flowing valve 4-1；Second water flowing valve 4-2；Hydraulic gage 5；Holder 6；Fixed pulley 6-
1；Steel wire rope 6-2；Hand-operated device 6-3；Mariotte flask 7；Plexiglass cylinder 7-1；Air intake valve 7-2；Third water flowing valve 7-
3；Outlet valve 7-4；Air bag 7-5；Sensor fastening device 8；Stainless steel stent 8-1；Nylon sheet 8-2；Miniature pore water pressure
Sensor installs circular hole 8-3；Miniature soil pressure cell installation circular hole 8-4；Metallic channel 8-5；Bolt 8-6；Gravelly sand 9-1；Weak water penetration
Soil body 9-2；Air free water 10.
Specific implementation mode
Present invention will be further explained below with reference to the attached drawings and examples.
As shown in Figure 1 and Figure 2, the present invention simulates the foundation model experimental rig of artesian head lifting, including model casing 1, holds
Five pressure rack dead level 2, artesian head regulating system, sensor fastening device 8 and measurement system parts.
The model casing 1 is by that all around and five pieces of bottom organic glass forms, can facilitate the soil body in observation experiment
Deformation；The top of 1 or so two sides of the model casing is respectively mounted flowing water Valve 3,3 bottom of flowing water Valve and experiment soil body top surface
It flushes, flowing water Valve 3 stays open to drain in time during experiment so that the water level line for testing the soil body is kept constant；Institute
The bottom side for stating model casing 1 installs the first water flowing valve 4-1 for being saturated the soil body, the second water flowing valve of bottom other side installation
4-2 is for being connected to artesian head regulating system；The pressure-bearing Stilt layer 2 is by poly (methyl methacrylate) plate 2-1, organic glass with limbers
Short column 2-2 and anti-filter geotextile 2-3 compositions；Organic glass short column is fixed in the bottoms poly (methyl methacrylate) plate 2-1 with limbers
2-2 is positioned in model casing 1, and is tightly connected by glass cement with four sides of model casing 1；The having with limbers
Machine glass plate 2-1 surface mount anti-filter geotextile 2-3 prevent the loss that the soil body is tested in artesian head change procedure；It is described
Artesian head regulating system is made of hydraulic gage 5, holder 6 and mariotte flask 7；The hydraulic gage 5 connects mould by three-way pipe
Molding box 1 and mariotte flask 7；Fixed pulley 6-1 is installed on the top of the holder 6, and the one end steel wire rope 6-2 connects hand-operated device 6-3, separately
One end bypasses fixed pulley 6-1 connections mariotte flask 7, and the lift adjustment artesian water of mariotte flask 7 is controlled by hand-operated device 6-3
The size of head；The mariotte flask 7 is by plexiglass cylinder 7-1, air intake valve 7-2, third water flowing valve 7-3, air outlet valve
Door 7-4 and air bag 7-5 compositions；Air intake valve 7-2 and third water flowing valve 7-3, top is arranged in the bottoms the plexiglass cylinder 7-1
Outlet valve 7-4 is arranged in portion；The air intake valve 7-2 is connect with air bag 7-5；Liquid in the plexiglass cylinder 7-1 is
Air free water 10；The nitrogen of 1atm is housed in the air bag 7-5；The sensor fastening device 8 is by stainless steel stent 8-1, nylon
Plate 8-2 and bolt 8-6 compositions；The sensor fastening device 8 is fixed on by bolt 8-6 on the trailing flank in model casing 1；Institute
Stating the position of sensor fastening device 8 can be adjusted according to the needs of experiment, and quantity can need to increase according to experiment；Institute
1 side of model casing for not influencing digital camera shooting should be mounted on by stating sensor fastening device 8；The measurement system includes micro-
Type pore water pressure sensor, miniature soil pressure cell, multi-Channels Data Acquisition and digital camera；The miniature pore water pressure
The signal transmssion line of force snesor and miniature soil pressure cell is connected on multi-Channels Data Acquisition；The digital camera is placed
Immediately ahead of model casing, it can be needed to add light source according to shooting；The digital camera answers exclusive PCR during the test,
Position can not move；The bottom experiment soil body in model casing 1 is gravelly sand 9-1 (simulate pressure-bearing soil layer), overlying experiment soil
Body is weak water penetration soil body 9-2 (such as clay silt), is saturated using air free water.
As shown in figure 3, the poly (methyl methacrylate) plate 2-1 with limbers makes the air free water in pressure-bearing Stilt layer 2 and gravelly sand
9-1 bearing course hydraulic communications provide the artesian head pressure of gravelly sand 9-1 bearing courses；The poly (methyl methacrylate) plate 2-1 with limbers
Thickness, the arrangement of limbers and the arrangement of organic glass short column 2-2 should meet Force Calculation requirement so that pressure-bearing Stilt layer 2
It is enough to bear the weight of the experiment soil body.
As shown in Fig. 4 (a), 4 (b), 4 (c), the nylon sheet 8-2 is fixed on stainless steel stent 8-1, stainless steel stent
It is provided with the circular hole 8-3 of the perforative miniature pore water pressure sensor of installation on 8-1 and nylon sheet 8-2, peace is provided on nylon sheet 8-2
It fills and is provided with metallic channel 8-5 on the circular hole 8-4 of miniature soil pressure cell, stainless steel stent 8-1 and nylon sheet 8-2 for placing micro-hole
The signal transmssion line of gap water pressure sensor and miniature soil pressure cell.
The course of work of the present invention is as follows：The 9-1 compactings of layering filling gravelly sand, are filled to specified height first into model casing 1
Degree；Weak water penetration soil body 9-2 compactings are loaded in layering, and when being filled to 8 bottom of sensor fastening device, pause is banketed, and are grown in model casing 1
Sensor fastening device 8 is installed in the middle position of axis side, and fixation is tightened with bolt 8-6；Then on sensor fastening device 8
Miniature pore water pressure sensor and miniature soil pressure cell are installed, pore water pressure sensor and soil pressure are drawn by metallic channel 8-5
The signal transmssion line of power box, signal transmssion line is connected on multi-Channels Data Acquisition；Continue layering and loads weak water penetration soil
Body 9-2 compactings, until completion of banketing, leads to air free water saturation examination with 6L/ days speed from the first water flowing valve 4-1 to model casing 1
Soil body gravelly sand 9-1 and weak water penetration soil body 9-2 are tested, waits for closing the first water flowing valve 4-1 after the soil body is fully saturated, opens water outlet
Valve 3, flowing water Valve 3 is kept it turned on during entire experiment.
Third water flowing valve 7-3 and outlet valve 7-4 are opened, third water flowing valve 7-3 having to mariotte flask 7 is passed through
Air free water 10 is injected in machine glass cylinder 7-1, by the gas in outlet valve 7-4 discharge plexiglass cylinders 7-1；Wait for organic glass
Air free water is filled in glass cylinder 7-1, closes third water flowing valve 7-3 and outlet valve 7-4；It is filled by air intake valve 7-2 connections
There is the air bag 7-5 of 1atm nitrogen；Then pass through the second water flowing valve 4-2 link models case 1 and artesian head regulating system.
Digital camera is placed in 1 front of model casing, camera parameter is adjusted, when the automatic shooting of digital camera is set
Between between be divided into 20s；If laboratory insufficient light, Led light sources can be added in digital camera both sides；It is acquired using data collecting instrument
The reading of miniature pore water pressure sensor and miniature soil pressure cell, is shot using digital camera under record experiment original state
Test the experiment soil body photo under original state；Open the second water flowing valve 4-2, third water flowing valve 7-3 and air intake valve 7-
2, and keep it turned on during the test；The height that mariotte flask 7 is adjusted by hand-operated device 6-3, is read by hydraulic gage 5
Artesian head size；Artesian head is increased to first order head pressure, Mario is fixed using the self-locking function of hand-operated device 6-3
The height of special bottle 7 opens data collecting instrument continuous acquisition and records under this grade of head pressure miniature pore water pressure sensor and micro-
The reading of type soil pressure cell, while triggering digital camera；After the sensor reading that pending data Acquisition Instrument is shown is stablized, pause
Data acquire and image taking；The artesian head pressure of next stage is continued to increase to using foregoing method, until reaching
Until the artesian head pressure of test requirements document；Pass through miniature pore water under data collecting instrument acquisition and recording artesian head pressure at different levels
The reading of pressure sensor and miniature soil pressure cell is shot by digital camera and tests soil deformation under artesian head pressure at different levels
Photo.
By analyze data collecting instrument acquisition and recording artesian head pressure at different levels under miniature pore water pressure sensor and
The reading of miniature soil pressure cell obtains the Water And Earth Pressures response pattern in foundation soil under artesian heads at different levels；By shining number
Photo captured by camera carries out PIV image analyses, the displacement field of the soil body is obtained, to learn that foundation soil body becomes with artesian head
The deformation rule of change.
Claims (9)
1. a kind of foundation model experimental rig of simulation artesian head lifting, which is characterized in that including model casing (1), pressure-bearing frame
Five dead level (2), artesian head regulating system, sensor fastening device (8) and measurement system parts；The model casing (1) by
All around and five pieces of bottom organic glass forms；The top of two sides in model casing (1) left and right is respectively mounted outlet valve
Door (3), flowing water Valve (3) bottom are flushed with experiment soil body top surface；The bottom side of the model casing (1) installs the first water-through valve
Door (4-1) installs the second water flowing valve (4-2) for being connected to artesian head regulating system for being saturated the soil body, the other side；It is described
Pressure-bearing Stilt layer (2) is by the poly (methyl methacrylate) plate (2-1) with limbers, organic glass short column (2-2) and anti-filter geotextile (2-3)
Composition；Organic glass short column (2-2) is fixed in described bottom poly (methyl methacrylate) plate (2-1) with limbers, is positioned over model casing (1)
It is interior, and be tightly connected with four sides of model casing (1)；Described poly (methyl methacrylate) plate (2-1) surface mount anti-filter with limbers
Geotextile (2-3)；The artesian head regulating system is made of hydraulic gage (5), holder (6) and mariotte flask (7)；It is described
Hydraulic gage (5) passes through three-way pipe link model case (1) and mariotte flask (7)；The top of the holder (6) is installed by fixed pulley
(6-1), the one end steel wire rope (6-2) connect hand-operated device (6-3), and the other end connects mariotte flask (7) around fixed pulley (6-1),
The size of the lift adjustment artesian head of mariotte flask (7) is controlled by hand-operated device (6-3)；The mariotte flask (7) by
Plexiglass cylinder (7-1), air intake valve (7-2), third water flowing valve (7-3), outlet valve (7-4) and air bag (7-5) group
At；Outlet is arranged in plexiglass cylinder (7-1) the bottom setting air intake valve (7-2) and third water flowing valve (7-3), top
Valve (7-4)；The air intake valve (7-2) connect with air bag (7-5)；The sensor fastening device (8) is by stainless steel stent
(8-1), nylon sheet (8-2) and bolt (8-6) composition；The sensor fastening device (8) is fixed on model by bolt (8-6)
On trailing flank in case (1)；The nylon sheet (8-2) is fixed on stainless steel stent (8-1), stainless steel stent (8-1) and Buddhist nun
It is provided with the circular hole (8-3) of the perforative miniature pore water pressure sensor of installation on imperial plate (8-2), peace is provided in nylon sheet (8-2)
The circular hole (8-4) of miniature soil pressure cell is filled, metallic channel (8-5) is provided in stainless steel stent (8-1) and nylon sheet (8-2)；It is described
Measurement system includes miniature pore water pressure sensor, miniature soil pressure cell, multi-Channels Data Acquisition and digital camera；Institute
It states miniature pore water pressure sensor and miniature soil pressure cell and passes through signal transmssion line connecting multi-channel data collecting instrument；The number
Code camera is positioned over immediately ahead of model casing.
2. a kind of foundation model experimental rig of simulation artesian head lifting according to claim 1, which is characterized in that institute
State the nitrogen that 1atm is housed in air bag (7-5).
3. a kind of foundation model experimental rig of simulation artesian head lifting according to claim 1, which is characterized in that institute
State that plexiglass cylinder (7-1) is built-in air free water (10).
4. a kind of foundation model experimental rig of simulation artesian head lifting according to claim 1, which is characterized in that mould
The bottom experiment soil body in molding box (1) is gravelly sand (9-1), to simulate pressure-bearing soil layer；It is the weak water penetration soil body that overlying, which tests the soil body,
(9-2), is saturated using air free water.
5. a kind of foundation model experimental rig of simulation artesian head lifting according to claim 4, which is characterized in that institute
The weak water penetration soil body (9-2) stated is clay silt.
6. a kind of foundation model experimental rig of simulation artesian head lifting according to claim 1, which is characterized in that institute
State digital camera answers exclusive PCR, position that can not move during the test；It can be needed to add light source according to shooting.
7. a kind of foundation model experimental rig of simulation artesian head lifting according to claim 1, which is characterized in that institute
Stating the position of sensor fastening device (8) can be adjusted according to the needs of experiment, and quantity can need to increase according to experiment；
Sensor fastening device (8) should be mounted on model casing (1) side for not influencing digital camera shooting.
8. a kind of foundation model experimental rig of simulation artesian head lifting according to claim 1, which is characterized in that institute
Four sides for stating the poly (methyl methacrylate) plate (2-1) with limbers and model casing (1) are tightly connected by glass cement.
9. a kind of foundation model experimental rig of simulation artesian head lifting according to claim 1, which is characterized in that institute
Stating hand-operated device (6-3) has self-locking function.
Priority Applications (1)
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| CN107436280A (en) * | 2017-09-26 | 2017-12-05 | 中国科学院武汉岩土力学研究所 | Curtain withdrawal device and curtain withdrawal system |
| CN108267370A (en) * | 2018-01-31 | 2018-07-10 | 浙江大学 | A kind of one-dimensional cylinder test device and method for simulating the kinetic head boundary effect soil body |
| CN108593513A (en) * | 2018-01-31 | 2018-09-28 | 浙江大学 | A kind of experimental rig and method for simulating the dynamic artesian water effect soil body |
| CN108387710A (en) * | 2018-01-31 | 2018-08-10 | 浙江大学 | A kind of experimental rig and method for simulating the rectangle head boundary effect soil body |
| CN114414391A (en) * | 2022-01-26 | 2022-04-29 | 中国矿业大学 | Testing device for applying constant load on surface of soil layer by using liquid column pressure and working method |
| CN117110586B (en) * | 2023-10-25 | 2023-12-26 | 中国地质大学（北京） | Test equipment and method for simulating ground subsidence induced by bearing water exploitation |
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